mpv/audio/out/buffer.c

737 lines
21 KiB
C
Raw Normal View History

audio: merge pull/push ring buffer glue code This is preparation to further cleanups (and eventually actual improvements) of the audio output code. AOs are split into two classes: pull and push. Pull AOs let an audio callback of the native audio API read from a ring buffer. Push AOs expose a function that works similar to write(), and for which we start a "feeder" thread. It seems making this split was beneficial, because of the different data flow, and emulating the one or other in the AOs directly would have created code duplication (all the "pull" AOs had their own ring buffer implementation before it was cleaned up). Unfortunately, both types had completely separate implementations (in pull.c and push.c). The idea was that little can be shared anyway. But that's very annoying now, because I want to change the API between AO and player. This commit attempts to merge them. I've moved everything from push.c to pull.c, the trivial entrypoints from ao.c to pull.c, and attempted to reconcile the differences. It's a mess, but at least there's only one ring buffer within the AO code now. Everything should work mostly the same. Pull AOs now always copy the audio data under a lock; before this commit, all ring buffer access was lock-free (except for the decoder wakeup callback, which acquired a mutex). In theory, this is "bad", and people obsessed with lock-free stuff will hate me, but in practice probably won't matter. The planned change will probably remove this copying-under-lock again, but who knows when this will happen. One change for the push AOs now makes it drop audio, where before only a warning was logged. This is only in case of AOs or drivers which exhibit unexpected (and now unsupported) behavior. This is a risky change. Although it's completely trivial conceptually, there are too many special cases. In addition, I barely tested it, and I've messed with it in a half-motivated state over a longer time, barely making any progress, and finishing it under a rush when I already should have been asleep. Most things seem to work, and I made superficial tests with alsa, sdl, and encode mode. This should cover most things, but there are a lot of tricky things that received no coverage. All this text means you should be prepared to roll back to an older commit and report your problem.
2020-05-24 23:53:41 +00:00
/*
* This file is part of mpv.
*
* mpv is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* mpv is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with mpv. If not, see <http://www.gnu.org/licenses/>.
*/
#include <stddef.h>
#include <inttypes.h>
#include <math.h>
audio: merge pull/push ring buffer glue code This is preparation to further cleanups (and eventually actual improvements) of the audio output code. AOs are split into two classes: pull and push. Pull AOs let an audio callback of the native audio API read from a ring buffer. Push AOs expose a function that works similar to write(), and for which we start a "feeder" thread. It seems making this split was beneficial, because of the different data flow, and emulating the one or other in the AOs directly would have created code duplication (all the "pull" AOs had their own ring buffer implementation before it was cleaned up). Unfortunately, both types had completely separate implementations (in pull.c and push.c). The idea was that little can be shared anyway. But that's very annoying now, because I want to change the API between AO and player. This commit attempts to merge them. I've moved everything from push.c to pull.c, the trivial entrypoints from ao.c to pull.c, and attempted to reconcile the differences. It's a mess, but at least there's only one ring buffer within the AO code now. Everything should work mostly the same. Pull AOs now always copy the audio data under a lock; before this commit, all ring buffer access was lock-free (except for the decoder wakeup callback, which acquired a mutex). In theory, this is "bad", and people obsessed with lock-free stuff will hate me, but in practice probably won't matter. The planned change will probably remove this copying-under-lock again, but who knows when this will happen. One change for the push AOs now makes it drop audio, where before only a warning was logged. This is only in case of AOs or drivers which exhibit unexpected (and now unsupported) behavior. This is a risky change. Although it's completely trivial conceptually, there are too many special cases. In addition, I barely tested it, and I've messed with it in a half-motivated state over a longer time, barely making any progress, and finishing it under a rush when I already should have been asleep. Most things seem to work, and I made superficial tests with alsa, sdl, and encode mode. This should cover most things, but there are a lot of tricky things that received no coverage. All this text means you should be prepared to roll back to an older commit and report your problem.
2020-05-24 23:53:41 +00:00
#include <unistd.h>
#include <errno.h>
#include <assert.h>
#include "ao.h"
#include "internal.h"
#include "audio/aframe.h"
#include "audio/format.h"
#include "common/msg.h"
#include "common/common.h"
#include "filters/f_async_queue.h"
#include "filters/filter_internal.h"
audio: merge pull/push ring buffer glue code This is preparation to further cleanups (and eventually actual improvements) of the audio output code. AOs are split into two classes: pull and push. Pull AOs let an audio callback of the native audio API read from a ring buffer. Push AOs expose a function that works similar to write(), and for which we start a "feeder" thread. It seems making this split was beneficial, because of the different data flow, and emulating the one or other in the AOs directly would have created code duplication (all the "pull" AOs had their own ring buffer implementation before it was cleaned up). Unfortunately, both types had completely separate implementations (in pull.c and push.c). The idea was that little can be shared anyway. But that's very annoying now, because I want to change the API between AO and player. This commit attempts to merge them. I've moved everything from push.c to pull.c, the trivial entrypoints from ao.c to pull.c, and attempted to reconcile the differences. It's a mess, but at least there's only one ring buffer within the AO code now. Everything should work mostly the same. Pull AOs now always copy the audio data under a lock; before this commit, all ring buffer access was lock-free (except for the decoder wakeup callback, which acquired a mutex). In theory, this is "bad", and people obsessed with lock-free stuff will hate me, but in practice probably won't matter. The planned change will probably remove this copying-under-lock again, but who knows when this will happen. One change for the push AOs now makes it drop audio, where before only a warning was logged. This is only in case of AOs or drivers which exhibit unexpected (and now unsupported) behavior. This is a risky change. Although it's completely trivial conceptually, there are too many special cases. In addition, I barely tested it, and I've messed with it in a half-motivated state over a longer time, barely making any progress, and finishing it under a rush when I already should have been asleep. Most things seem to work, and I made superficial tests with alsa, sdl, and encode mode. This should cover most things, but there are a lot of tricky things that received no coverage. All this text means you should be prepared to roll back to an older commit and report your problem.
2020-05-24 23:53:41 +00:00
#include "osdep/timer.h"
#include "osdep/threads.h"
struct buffer_state {
// Buffer and AO
2023-10-21 02:55:41 +00:00
mp_mutex lock;
mp_cond wakeup;
audio: merge pull/push ring buffer glue code This is preparation to further cleanups (and eventually actual improvements) of the audio output code. AOs are split into two classes: pull and push. Pull AOs let an audio callback of the native audio API read from a ring buffer. Push AOs expose a function that works similar to write(), and for which we start a "feeder" thread. It seems making this split was beneficial, because of the different data flow, and emulating the one or other in the AOs directly would have created code duplication (all the "pull" AOs had their own ring buffer implementation before it was cleaned up). Unfortunately, both types had completely separate implementations (in pull.c and push.c). The idea was that little can be shared anyway. But that's very annoying now, because I want to change the API between AO and player. This commit attempts to merge them. I've moved everything from push.c to pull.c, the trivial entrypoints from ao.c to pull.c, and attempted to reconcile the differences. It's a mess, but at least there's only one ring buffer within the AO code now. Everything should work mostly the same. Pull AOs now always copy the audio data under a lock; before this commit, all ring buffer access was lock-free (except for the decoder wakeup callback, which acquired a mutex). In theory, this is "bad", and people obsessed with lock-free stuff will hate me, but in practice probably won't matter. The planned change will probably remove this copying-under-lock again, but who knows when this will happen. One change for the push AOs now makes it drop audio, where before only a warning was logged. This is only in case of AOs or drivers which exhibit unexpected (and now unsupported) behavior. This is a risky change. Although it's completely trivial conceptually, there are too many special cases. In addition, I barely tested it, and I've messed with it in a half-motivated state over a longer time, barely making any progress, and finishing it under a rush when I already should have been asleep. Most things seem to work, and I made superficial tests with alsa, sdl, and encode mode. This should cover most things, but there are a lot of tricky things that received no coverage. All this text means you should be prepared to roll back to an older commit and report your problem.
2020-05-24 23:53:41 +00:00
// Playthread sleep
2023-10-21 02:55:41 +00:00
mp_mutex pt_lock;
mp_cond pt_wakeup;
audio: merge pull/push ring buffer glue code This is preparation to further cleanups (and eventually actual improvements) of the audio output code. AOs are split into two classes: pull and push. Pull AOs let an audio callback of the native audio API read from a ring buffer. Push AOs expose a function that works similar to write(), and for which we start a "feeder" thread. It seems making this split was beneficial, because of the different data flow, and emulating the one or other in the AOs directly would have created code duplication (all the "pull" AOs had their own ring buffer implementation before it was cleaned up). Unfortunately, both types had completely separate implementations (in pull.c and push.c). The idea was that little can be shared anyway. But that's very annoying now, because I want to change the API between AO and player. This commit attempts to merge them. I've moved everything from push.c to pull.c, the trivial entrypoints from ao.c to pull.c, and attempted to reconcile the differences. It's a mess, but at least there's only one ring buffer within the AO code now. Everything should work mostly the same. Pull AOs now always copy the audio data under a lock; before this commit, all ring buffer access was lock-free (except for the decoder wakeup callback, which acquired a mutex). In theory, this is "bad", and people obsessed with lock-free stuff will hate me, but in practice probably won't matter. The planned change will probably remove this copying-under-lock again, but who knows when this will happen. One change for the push AOs now makes it drop audio, where before only a warning was logged. This is only in case of AOs or drivers which exhibit unexpected (and now unsupported) behavior. This is a risky change. Although it's completely trivial conceptually, there are too many special cases. In addition, I barely tested it, and I've messed with it in a half-motivated state over a longer time, barely making any progress, and finishing it under a rush when I already should have been asleep. Most things seem to work, and I made superficial tests with alsa, sdl, and encode mode. This should cover most things, but there are a lot of tricky things that received no coverage. All this text means you should be prepared to roll back to an older commit and report your problem.
2020-05-24 23:53:41 +00:00
// Access from AO driver's thread only.
char *convert_buffer;
// Immutable.
struct mp_async_queue *queue;
audio: merge pull/push ring buffer glue code This is preparation to further cleanups (and eventually actual improvements) of the audio output code. AOs are split into two classes: pull and push. Pull AOs let an audio callback of the native audio API read from a ring buffer. Push AOs expose a function that works similar to write(), and for which we start a "feeder" thread. It seems making this split was beneficial, because of the different data flow, and emulating the one or other in the AOs directly would have created code duplication (all the "pull" AOs had their own ring buffer implementation before it was cleaned up). Unfortunately, both types had completely separate implementations (in pull.c and push.c). The idea was that little can be shared anyway. But that's very annoying now, because I want to change the API between AO and player. This commit attempts to merge them. I've moved everything from push.c to pull.c, the trivial entrypoints from ao.c to pull.c, and attempted to reconcile the differences. It's a mess, but at least there's only one ring buffer within the AO code now. Everything should work mostly the same. Pull AOs now always copy the audio data under a lock; before this commit, all ring buffer access was lock-free (except for the decoder wakeup callback, which acquired a mutex). In theory, this is "bad", and people obsessed with lock-free stuff will hate me, but in practice probably won't matter. The planned change will probably remove this copying-under-lock again, but who knows when this will happen. One change for the push AOs now makes it drop audio, where before only a warning was logged. This is only in case of AOs or drivers which exhibit unexpected (and now unsupported) behavior. This is a risky change. Although it's completely trivial conceptually, there are too many special cases. In addition, I barely tested it, and I've messed with it in a half-motivated state over a longer time, barely making any progress, and finishing it under a rush when I already should have been asleep. Most things seem to work, and I made superficial tests with alsa, sdl, and encode mode. This should cover most things, but there are a lot of tricky things that received no coverage. All this text means you should be prepared to roll back to an older commit and report your problem.
2020-05-24 23:53:41 +00:00
// --- protected by lock
audio: merge pull/push ring buffer glue code This is preparation to further cleanups (and eventually actual improvements) of the audio output code. AOs are split into two classes: pull and push. Pull AOs let an audio callback of the native audio API read from a ring buffer. Push AOs expose a function that works similar to write(), and for which we start a "feeder" thread. It seems making this split was beneficial, because of the different data flow, and emulating the one or other in the AOs directly would have created code duplication (all the "pull" AOs had their own ring buffer implementation before it was cleaned up). Unfortunately, both types had completely separate implementations (in pull.c and push.c). The idea was that little can be shared anyway. But that's very annoying now, because I want to change the API between AO and player. This commit attempts to merge them. I've moved everything from push.c to pull.c, the trivial entrypoints from ao.c to pull.c, and attempted to reconcile the differences. It's a mess, but at least there's only one ring buffer within the AO code now. Everything should work mostly the same. Pull AOs now always copy the audio data under a lock; before this commit, all ring buffer access was lock-free (except for the decoder wakeup callback, which acquired a mutex). In theory, this is "bad", and people obsessed with lock-free stuff will hate me, but in practice probably won't matter. The planned change will probably remove this copying-under-lock again, but who knows when this will happen. One change for the push AOs now makes it drop audio, where before only a warning was logged. This is only in case of AOs or drivers which exhibit unexpected (and now unsupported) behavior. This is a risky change. Although it's completely trivial conceptually, there are too many special cases. In addition, I barely tested it, and I've messed with it in a half-motivated state over a longer time, barely making any progress, and finishing it under a rush when I already should have been asleep. Most things seem to work, and I made superficial tests with alsa, sdl, and encode mode. This should cover most things, but there are a lot of tricky things that received no coverage. All this text means you should be prepared to roll back to an older commit and report your problem.
2020-05-24 23:53:41 +00:00
struct mp_filter *filter_root;
struct mp_filter *input; // connected to queue
struct mp_aframe *pending; // last, not fully consumed output
audio: merge pull/push ring buffer glue code This is preparation to further cleanups (and eventually actual improvements) of the audio output code. AOs are split into two classes: pull and push. Pull AOs let an audio callback of the native audio API read from a ring buffer. Push AOs expose a function that works similar to write(), and for which we start a "feeder" thread. It seems making this split was beneficial, because of the different data flow, and emulating the one or other in the AOs directly would have created code duplication (all the "pull" AOs had their own ring buffer implementation before it was cleaned up). Unfortunately, both types had completely separate implementations (in pull.c and push.c). The idea was that little can be shared anyway. But that's very annoying now, because I want to change the API between AO and player. This commit attempts to merge them. I've moved everything from push.c to pull.c, the trivial entrypoints from ao.c to pull.c, and attempted to reconcile the differences. It's a mess, but at least there's only one ring buffer within the AO code now. Everything should work mostly the same. Pull AOs now always copy the audio data under a lock; before this commit, all ring buffer access was lock-free (except for the decoder wakeup callback, which acquired a mutex). In theory, this is "bad", and people obsessed with lock-free stuff will hate me, but in practice probably won't matter. The planned change will probably remove this copying-under-lock again, but who knows when this will happen. One change for the push AOs now makes it drop audio, where before only a warning was logged. This is only in case of AOs or drivers which exhibit unexpected (and now unsupported) behavior. This is a risky change. Although it's completely trivial conceptually, there are too many special cases. In addition, I barely tested it, and I've messed with it in a half-motivated state over a longer time, barely making any progress, and finishing it under a rush when I already should have been asleep. Most things seem to work, and I made superficial tests with alsa, sdl, and encode mode. This should cover most things, but there are a lot of tricky things that received no coverage. All this text means you should be prepared to roll back to an older commit and report your problem.
2020-05-24 23:53:41 +00:00
bool streaming; // AO streaming active
bool playing; // logically playing audio from buffer
bool paused; // logically paused
audio: merge pull/push ring buffer glue code This is preparation to further cleanups (and eventually actual improvements) of the audio output code. AOs are split into two classes: pull and push. Pull AOs let an audio callback of the native audio API read from a ring buffer. Push AOs expose a function that works similar to write(), and for which we start a "feeder" thread. It seems making this split was beneficial, because of the different data flow, and emulating the one or other in the AOs directly would have created code duplication (all the "pull" AOs had their own ring buffer implementation before it was cleaned up). Unfortunately, both types had completely separate implementations (in pull.c and push.c). The idea was that little can be shared anyway. But that's very annoying now, because I want to change the API between AO and player. This commit attempts to merge them. I've moved everything from push.c to pull.c, the trivial entrypoints from ao.c to pull.c, and attempted to reconcile the differences. It's a mess, but at least there's only one ring buffer within the AO code now. Everything should work mostly the same. Pull AOs now always copy the audio data under a lock; before this commit, all ring buffer access was lock-free (except for the decoder wakeup callback, which acquired a mutex). In theory, this is "bad", and people obsessed with lock-free stuff will hate me, but in practice probably won't matter. The planned change will probably remove this copying-under-lock again, but who knows when this will happen. One change for the push AOs now makes it drop audio, where before only a warning was logged. This is only in case of AOs or drivers which exhibit unexpected (and now unsupported) behavior. This is a risky change. Although it's completely trivial conceptually, there are too many special cases. In addition, I barely tested it, and I've messed with it in a half-motivated state over a longer time, barely making any progress, and finishing it under a rush when I already should have been asleep. Most things seem to work, and I made superficial tests with alsa, sdl, and encode mode. This should cover most things, but there are a lot of tricky things that received no coverage. All this text means you should be prepared to roll back to an older commit and report your problem.
2020-05-24 23:53:41 +00:00
int64_t end_time_ns; // absolute output time of last played sample
audio: merge pull/push ring buffer glue code This is preparation to further cleanups (and eventually actual improvements) of the audio output code. AOs are split into two classes: pull and push. Pull AOs let an audio callback of the native audio API read from a ring buffer. Push AOs expose a function that works similar to write(), and for which we start a "feeder" thread. It seems making this split was beneficial, because of the different data flow, and emulating the one or other in the AOs directly would have created code duplication (all the "pull" AOs had their own ring buffer implementation before it was cleaned up). Unfortunately, both types had completely separate implementations (in pull.c and push.c). The idea was that little can be shared anyway. But that's very annoying now, because I want to change the API between AO and player. This commit attempts to merge them. I've moved everything from push.c to pull.c, the trivial entrypoints from ao.c to pull.c, and attempted to reconcile the differences. It's a mess, but at least there's only one ring buffer within the AO code now. Everything should work mostly the same. Pull AOs now always copy the audio data under a lock; before this commit, all ring buffer access was lock-free (except for the decoder wakeup callback, which acquired a mutex). In theory, this is "bad", and people obsessed with lock-free stuff will hate me, but in practice probably won't matter. The planned change will probably remove this copying-under-lock again, but who knows when this will happen. One change for the push AOs now makes it drop audio, where before only a warning was logged. This is only in case of AOs or drivers which exhibit unexpected (and now unsupported) behavior. This is a risky change. Although it's completely trivial conceptually, there are too many special cases. In addition, I barely tested it, and I've messed with it in a half-motivated state over a longer time, barely making any progress, and finishing it under a rush when I already should have been asleep. Most things seem to work, and I made superficial tests with alsa, sdl, and encode mode. This should cover most things, but there are a lot of tricky things that received no coverage. All this text means you should be prepared to roll back to an older commit and report your problem.
2020-05-24 23:53:41 +00:00
bool initial_unblocked;
// "Push" AOs only (AOs with driver->write).
bool hw_paused; // driver->set_pause() was used successfully
bool recover_pause; // non-hw_paused: needs to recover delay
struct mp_pcm_state prepause_state;
2023-10-21 02:55:41 +00:00
mp_thread thread; // thread shoveling data to AO
audio: merge pull/push ring buffer glue code This is preparation to further cleanups (and eventually actual improvements) of the audio output code. AOs are split into two classes: pull and push. Pull AOs let an audio callback of the native audio API read from a ring buffer. Push AOs expose a function that works similar to write(), and for which we start a "feeder" thread. It seems making this split was beneficial, because of the different data flow, and emulating the one or other in the AOs directly would have created code duplication (all the "pull" AOs had their own ring buffer implementation before it was cleaned up). Unfortunately, both types had completely separate implementations (in pull.c and push.c). The idea was that little can be shared anyway. But that's very annoying now, because I want to change the API between AO and player. This commit attempts to merge them. I've moved everything from push.c to pull.c, the trivial entrypoints from ao.c to pull.c, and attempted to reconcile the differences. It's a mess, but at least there's only one ring buffer within the AO code now. Everything should work mostly the same. Pull AOs now always copy the audio data under a lock; before this commit, all ring buffer access was lock-free (except for the decoder wakeup callback, which acquired a mutex). In theory, this is "bad", and people obsessed with lock-free stuff will hate me, but in practice probably won't matter. The planned change will probably remove this copying-under-lock again, but who knows when this will happen. One change for the push AOs now makes it drop audio, where before only a warning was logged. This is only in case of AOs or drivers which exhibit unexpected (and now unsupported) behavior. This is a risky change. Although it's completely trivial conceptually, there are too many special cases. In addition, I barely tested it, and I've messed with it in a half-motivated state over a longer time, barely making any progress, and finishing it under a rush when I already should have been asleep. Most things seem to work, and I made superficial tests with alsa, sdl, and encode mode. This should cover most things, but there are a lot of tricky things that received no coverage. All this text means you should be prepared to roll back to an older commit and report your problem.
2020-05-24 23:53:41 +00:00
bool thread_valid; // thread is running
struct mp_aframe *temp_buf;
// --- protected by pt_lock
bool need_wakeup;
bool terminate; // exit thread
audio: merge pull/push ring buffer glue code This is preparation to further cleanups (and eventually actual improvements) of the audio output code. AOs are split into two classes: pull and push. Pull AOs let an audio callback of the native audio API read from a ring buffer. Push AOs expose a function that works similar to write(), and for which we start a "feeder" thread. It seems making this split was beneficial, because of the different data flow, and emulating the one or other in the AOs directly would have created code duplication (all the "pull" AOs had their own ring buffer implementation before it was cleaned up). Unfortunately, both types had completely separate implementations (in pull.c and push.c). The idea was that little can be shared anyway. But that's very annoying now, because I want to change the API between AO and player. This commit attempts to merge them. I've moved everything from push.c to pull.c, the trivial entrypoints from ao.c to pull.c, and attempted to reconcile the differences. It's a mess, but at least there's only one ring buffer within the AO code now. Everything should work mostly the same. Pull AOs now always copy the audio data under a lock; before this commit, all ring buffer access was lock-free (except for the decoder wakeup callback, which acquired a mutex). In theory, this is "bad", and people obsessed with lock-free stuff will hate me, but in practice probably won't matter. The planned change will probably remove this copying-under-lock again, but who knows when this will happen. One change for the push AOs now makes it drop audio, where before only a warning was logged. This is only in case of AOs or drivers which exhibit unexpected (and now unsupported) behavior. This is a risky change. Although it's completely trivial conceptually, there are too many special cases. In addition, I barely tested it, and I've messed with it in a half-motivated state over a longer time, barely making any progress, and finishing it under a rush when I already should have been asleep. Most things seem to work, and I made superficial tests with alsa, sdl, and encode mode. This should cover most things, but there are a lot of tricky things that received no coverage. All this text means you should be prepared to roll back to an older commit and report your problem.
2020-05-24 23:53:41 +00:00
};
2023-10-21 02:55:41 +00:00
static MP_THREAD_VOID playthread(void *arg);
audio: merge pull/push ring buffer glue code This is preparation to further cleanups (and eventually actual improvements) of the audio output code. AOs are split into two classes: pull and push. Pull AOs let an audio callback of the native audio API read from a ring buffer. Push AOs expose a function that works similar to write(), and for which we start a "feeder" thread. It seems making this split was beneficial, because of the different data flow, and emulating the one or other in the AOs directly would have created code duplication (all the "pull" AOs had their own ring buffer implementation before it was cleaned up). Unfortunately, both types had completely separate implementations (in pull.c and push.c). The idea was that little can be shared anyway. But that's very annoying now, because I want to change the API between AO and player. This commit attempts to merge them. I've moved everything from push.c to pull.c, the trivial entrypoints from ao.c to pull.c, and attempted to reconcile the differences. It's a mess, but at least there's only one ring buffer within the AO code now. Everything should work mostly the same. Pull AOs now always copy the audio data under a lock; before this commit, all ring buffer access was lock-free (except for the decoder wakeup callback, which acquired a mutex). In theory, this is "bad", and people obsessed with lock-free stuff will hate me, but in practice probably won't matter. The planned change will probably remove this copying-under-lock again, but who knows when this will happen. One change for the push AOs now makes it drop audio, where before only a warning was logged. This is only in case of AOs or drivers which exhibit unexpected (and now unsupported) behavior. This is a risky change. Although it's completely trivial conceptually, there are too many special cases. In addition, I barely tested it, and I've messed with it in a half-motivated state over a longer time, barely making any progress, and finishing it under a rush when I already should have been asleep. Most things seem to work, and I made superficial tests with alsa, sdl, and encode mode. This should cover most things, but there are a lot of tricky things that received no coverage. All this text means you should be prepared to roll back to an older commit and report your problem.
2020-05-24 23:53:41 +00:00
void ao_wakeup_playthread(struct ao *ao)
audio: merge pull/push ring buffer glue code This is preparation to further cleanups (and eventually actual improvements) of the audio output code. AOs are split into two classes: pull and push. Pull AOs let an audio callback of the native audio API read from a ring buffer. Push AOs expose a function that works similar to write(), and for which we start a "feeder" thread. It seems making this split was beneficial, because of the different data flow, and emulating the one or other in the AOs directly would have created code duplication (all the "pull" AOs had their own ring buffer implementation before it was cleaned up). Unfortunately, both types had completely separate implementations (in pull.c and push.c). The idea was that little can be shared anyway. But that's very annoying now, because I want to change the API between AO and player. This commit attempts to merge them. I've moved everything from push.c to pull.c, the trivial entrypoints from ao.c to pull.c, and attempted to reconcile the differences. It's a mess, but at least there's only one ring buffer within the AO code now. Everything should work mostly the same. Pull AOs now always copy the audio data under a lock; before this commit, all ring buffer access was lock-free (except for the decoder wakeup callback, which acquired a mutex). In theory, this is "bad", and people obsessed with lock-free stuff will hate me, but in practice probably won't matter. The planned change will probably remove this copying-under-lock again, but who knows when this will happen. One change for the push AOs now makes it drop audio, where before only a warning was logged. This is only in case of AOs or drivers which exhibit unexpected (and now unsupported) behavior. This is a risky change. Although it's completely trivial conceptually, there are too many special cases. In addition, I barely tested it, and I've messed with it in a half-motivated state over a longer time, barely making any progress, and finishing it under a rush when I already should have been asleep. Most things seem to work, and I made superficial tests with alsa, sdl, and encode mode. This should cover most things, but there are a lot of tricky things that received no coverage. All this text means you should be prepared to roll back to an older commit and report your problem.
2020-05-24 23:53:41 +00:00
{
struct buffer_state *p = ao->buffer_state;
2023-10-21 02:55:41 +00:00
mp_mutex_lock(&p->pt_lock);
audio: merge pull/push ring buffer glue code This is preparation to further cleanups (and eventually actual improvements) of the audio output code. AOs are split into two classes: pull and push. Pull AOs let an audio callback of the native audio API read from a ring buffer. Push AOs expose a function that works similar to write(), and for which we start a "feeder" thread. It seems making this split was beneficial, because of the different data flow, and emulating the one or other in the AOs directly would have created code duplication (all the "pull" AOs had their own ring buffer implementation before it was cleaned up). Unfortunately, both types had completely separate implementations (in pull.c and push.c). The idea was that little can be shared anyway. But that's very annoying now, because I want to change the API between AO and player. This commit attempts to merge them. I've moved everything from push.c to pull.c, the trivial entrypoints from ao.c to pull.c, and attempted to reconcile the differences. It's a mess, but at least there's only one ring buffer within the AO code now. Everything should work mostly the same. Pull AOs now always copy the audio data under a lock; before this commit, all ring buffer access was lock-free (except for the decoder wakeup callback, which acquired a mutex). In theory, this is "bad", and people obsessed with lock-free stuff will hate me, but in practice probably won't matter. The planned change will probably remove this copying-under-lock again, but who knows when this will happen. One change for the push AOs now makes it drop audio, where before only a warning was logged. This is only in case of AOs or drivers which exhibit unexpected (and now unsupported) behavior. This is a risky change. Although it's completely trivial conceptually, there are too many special cases. In addition, I barely tested it, and I've messed with it in a half-motivated state over a longer time, barely making any progress, and finishing it under a rush when I already should have been asleep. Most things seem to work, and I made superficial tests with alsa, sdl, and encode mode. This should cover most things, but there are a lot of tricky things that received no coverage. All this text means you should be prepared to roll back to an older commit and report your problem.
2020-05-24 23:53:41 +00:00
p->need_wakeup = true;
2023-10-21 02:55:41 +00:00
mp_cond_broadcast(&p->pt_wakeup);
mp_mutex_unlock(&p->pt_lock);
}
// called locked
static void get_dev_state(struct ao *ao, struct mp_pcm_state *state)
{
struct buffer_state *p = ao->buffer_state;
if (p->paused && p->playing && !ao->stream_silence) {
*state = p->prepause_state;
return;
}
*state = (struct mp_pcm_state){
.free_samples = -1,
.queued_samples = -1,
.delay = -1,
};
ao->driver->get_state(ao, state);
audio: merge pull/push ring buffer glue code This is preparation to further cleanups (and eventually actual improvements) of the audio output code. AOs are split into two classes: pull and push. Pull AOs let an audio callback of the native audio API read from a ring buffer. Push AOs expose a function that works similar to write(), and for which we start a "feeder" thread. It seems making this split was beneficial, because of the different data flow, and emulating the one or other in the AOs directly would have created code duplication (all the "pull" AOs had their own ring buffer implementation before it was cleaned up). Unfortunately, both types had completely separate implementations (in pull.c and push.c). The idea was that little can be shared anyway. But that's very annoying now, because I want to change the API between AO and player. This commit attempts to merge them. I've moved everything from push.c to pull.c, the trivial entrypoints from ao.c to pull.c, and attempted to reconcile the differences. It's a mess, but at least there's only one ring buffer within the AO code now. Everything should work mostly the same. Pull AOs now always copy the audio data under a lock; before this commit, all ring buffer access was lock-free (except for the decoder wakeup callback, which acquired a mutex). In theory, this is "bad", and people obsessed with lock-free stuff will hate me, but in practice probably won't matter. The planned change will probably remove this copying-under-lock again, but who knows when this will happen. One change for the push AOs now makes it drop audio, where before only a warning was logged. This is only in case of AOs or drivers which exhibit unexpected (and now unsupported) behavior. This is a risky change. Although it's completely trivial conceptually, there are too many special cases. In addition, I barely tested it, and I've messed with it in a half-motivated state over a longer time, barely making any progress, and finishing it under a rush when I already should have been asleep. Most things seem to work, and I made superficial tests with alsa, sdl, and encode mode. This should cover most things, but there are a lot of tricky things that received no coverage. All this text means you should be prepared to roll back to an older commit and report your problem.
2020-05-24 23:53:41 +00:00
}
struct mp_async_queue *ao_get_queue(struct ao *ao)
audio: merge pull/push ring buffer glue code This is preparation to further cleanups (and eventually actual improvements) of the audio output code. AOs are split into two classes: pull and push. Pull AOs let an audio callback of the native audio API read from a ring buffer. Push AOs expose a function that works similar to write(), and for which we start a "feeder" thread. It seems making this split was beneficial, because of the different data flow, and emulating the one or other in the AOs directly would have created code duplication (all the "pull" AOs had their own ring buffer implementation before it was cleaned up). Unfortunately, both types had completely separate implementations (in pull.c and push.c). The idea was that little can be shared anyway. But that's very annoying now, because I want to change the API between AO and player. This commit attempts to merge them. I've moved everything from push.c to pull.c, the trivial entrypoints from ao.c to pull.c, and attempted to reconcile the differences. It's a mess, but at least there's only one ring buffer within the AO code now. Everything should work mostly the same. Pull AOs now always copy the audio data under a lock; before this commit, all ring buffer access was lock-free (except for the decoder wakeup callback, which acquired a mutex). In theory, this is "bad", and people obsessed with lock-free stuff will hate me, but in practice probably won't matter. The planned change will probably remove this copying-under-lock again, but who knows when this will happen. One change for the push AOs now makes it drop audio, where before only a warning was logged. This is only in case of AOs or drivers which exhibit unexpected (and now unsupported) behavior. This is a risky change. Although it's completely trivial conceptually, there are too many special cases. In addition, I barely tested it, and I've messed with it in a half-motivated state over a longer time, barely making any progress, and finishing it under a rush when I already should have been asleep. Most things seem to work, and I made superficial tests with alsa, sdl, and encode mode. This should cover most things, but there are a lot of tricky things that received no coverage. All this text means you should be prepared to roll back to an older commit and report your problem.
2020-05-24 23:53:41 +00:00
{
struct buffer_state *p = ao->buffer_state;
return p->queue;
audio: merge pull/push ring buffer glue code This is preparation to further cleanups (and eventually actual improvements) of the audio output code. AOs are split into two classes: pull and push. Pull AOs let an audio callback of the native audio API read from a ring buffer. Push AOs expose a function that works similar to write(), and for which we start a "feeder" thread. It seems making this split was beneficial, because of the different data flow, and emulating the one or other in the AOs directly would have created code duplication (all the "pull" AOs had their own ring buffer implementation before it was cleaned up). Unfortunately, both types had completely separate implementations (in pull.c and push.c). The idea was that little can be shared anyway. But that's very annoying now, because I want to change the API between AO and player. This commit attempts to merge them. I've moved everything from push.c to pull.c, the trivial entrypoints from ao.c to pull.c, and attempted to reconcile the differences. It's a mess, but at least there's only one ring buffer within the AO code now. Everything should work mostly the same. Pull AOs now always copy the audio data under a lock; before this commit, all ring buffer access was lock-free (except for the decoder wakeup callback, which acquired a mutex). In theory, this is "bad", and people obsessed with lock-free stuff will hate me, but in practice probably won't matter. The planned change will probably remove this copying-under-lock again, but who knows when this will happen. One change for the push AOs now makes it drop audio, where before only a warning was logged. This is only in case of AOs or drivers which exhibit unexpected (and now unsupported) behavior. This is a risky change. Although it's completely trivial conceptually, there are too many special cases. In addition, I barely tested it, and I've messed with it in a half-motivated state over a longer time, barely making any progress, and finishing it under a rush when I already should have been asleep. Most things seem to work, and I made superficial tests with alsa, sdl, and encode mode. This should cover most things, but there are a lot of tricky things that received no coverage. All this text means you should be prepared to roll back to an older commit and report your problem.
2020-05-24 23:53:41 +00:00
}
// Special behavior with data==NULL: caller uses p->pending.
static int read_buffer(struct ao *ao, void **data, int samples, bool *eof,
bool pad_silence)
audio: merge pull/push ring buffer glue code This is preparation to further cleanups (and eventually actual improvements) of the audio output code. AOs are split into two classes: pull and push. Pull AOs let an audio callback of the native audio API read from a ring buffer. Push AOs expose a function that works similar to write(), and for which we start a "feeder" thread. It seems making this split was beneficial, because of the different data flow, and emulating the one or other in the AOs directly would have created code duplication (all the "pull" AOs had their own ring buffer implementation before it was cleaned up). Unfortunately, both types had completely separate implementations (in pull.c and push.c). The idea was that little can be shared anyway. But that's very annoying now, because I want to change the API between AO and player. This commit attempts to merge them. I've moved everything from push.c to pull.c, the trivial entrypoints from ao.c to pull.c, and attempted to reconcile the differences. It's a mess, but at least there's only one ring buffer within the AO code now. Everything should work mostly the same. Pull AOs now always copy the audio data under a lock; before this commit, all ring buffer access was lock-free (except for the decoder wakeup callback, which acquired a mutex). In theory, this is "bad", and people obsessed with lock-free stuff will hate me, but in practice probably won't matter. The planned change will probably remove this copying-under-lock again, but who knows when this will happen. One change for the push AOs now makes it drop audio, where before only a warning was logged. This is only in case of AOs or drivers which exhibit unexpected (and now unsupported) behavior. This is a risky change. Although it's completely trivial conceptually, there are too many special cases. In addition, I barely tested it, and I've messed with it in a half-motivated state over a longer time, barely making any progress, and finishing it under a rush when I already should have been asleep. Most things seem to work, and I made superficial tests with alsa, sdl, and encode mode. This should cover most things, but there are a lot of tricky things that received no coverage. All this text means you should be prepared to roll back to an older commit and report your problem.
2020-05-24 23:53:41 +00:00
{
struct buffer_state *p = ao->buffer_state;
int pos = 0;
*eof = false;
while (p->playing && !p->paused && pos < samples) {
if (!p->pending || !mp_aframe_get_size(p->pending)) {
TA_FREEP(&p->pending);
struct mp_frame frame = mp_pin_out_read(p->input->pins[0]);
if (!frame.type)
break; // we can't/don't want to block
if (frame.type != MP_FRAME_AUDIO) {
if (frame.type == MP_FRAME_EOF)
*eof = true;
mp_frame_unref(&frame);
continue;
}
p->pending = frame.data;
}
audio: merge pull/push ring buffer glue code This is preparation to further cleanups (and eventually actual improvements) of the audio output code. AOs are split into two classes: pull and push. Pull AOs let an audio callback of the native audio API read from a ring buffer. Push AOs expose a function that works similar to write(), and for which we start a "feeder" thread. It seems making this split was beneficial, because of the different data flow, and emulating the one or other in the AOs directly would have created code duplication (all the "pull" AOs had their own ring buffer implementation before it was cleaned up). Unfortunately, both types had completely separate implementations (in pull.c and push.c). The idea was that little can be shared anyway. But that's very annoying now, because I want to change the API between AO and player. This commit attempts to merge them. I've moved everything from push.c to pull.c, the trivial entrypoints from ao.c to pull.c, and attempted to reconcile the differences. It's a mess, but at least there's only one ring buffer within the AO code now. Everything should work mostly the same. Pull AOs now always copy the audio data under a lock; before this commit, all ring buffer access was lock-free (except for the decoder wakeup callback, which acquired a mutex). In theory, this is "bad", and people obsessed with lock-free stuff will hate me, but in practice probably won't matter. The planned change will probably remove this copying-under-lock again, but who knows when this will happen. One change for the push AOs now makes it drop audio, where before only a warning was logged. This is only in case of AOs or drivers which exhibit unexpected (and now unsupported) behavior. This is a risky change. Although it's completely trivial conceptually, there are too many special cases. In addition, I barely tested it, and I've messed with it in a half-motivated state over a longer time, barely making any progress, and finishing it under a rush when I already should have been asleep. Most things seem to work, and I made superficial tests with alsa, sdl, and encode mode. This should cover most things, but there are a lot of tricky things that received no coverage. All this text means you should be prepared to roll back to an older commit and report your problem.
2020-05-24 23:53:41 +00:00
if (!data)
break;
audio: merge pull/push ring buffer glue code This is preparation to further cleanups (and eventually actual improvements) of the audio output code. AOs are split into two classes: pull and push. Pull AOs let an audio callback of the native audio API read from a ring buffer. Push AOs expose a function that works similar to write(), and for which we start a "feeder" thread. It seems making this split was beneficial, because of the different data flow, and emulating the one or other in the AOs directly would have created code duplication (all the "pull" AOs had their own ring buffer implementation before it was cleaned up). Unfortunately, both types had completely separate implementations (in pull.c and push.c). The idea was that little can be shared anyway. But that's very annoying now, because I want to change the API between AO and player. This commit attempts to merge them. I've moved everything from push.c to pull.c, the trivial entrypoints from ao.c to pull.c, and attempted to reconcile the differences. It's a mess, but at least there's only one ring buffer within the AO code now. Everything should work mostly the same. Pull AOs now always copy the audio data under a lock; before this commit, all ring buffer access was lock-free (except for the decoder wakeup callback, which acquired a mutex). In theory, this is "bad", and people obsessed with lock-free stuff will hate me, but in practice probably won't matter. The planned change will probably remove this copying-under-lock again, but who knows when this will happen. One change for the push AOs now makes it drop audio, where before only a warning was logged. This is only in case of AOs or drivers which exhibit unexpected (and now unsupported) behavior. This is a risky change. Although it's completely trivial conceptually, there are too many special cases. In addition, I barely tested it, and I've messed with it in a half-motivated state over a longer time, barely making any progress, and finishing it under a rush when I already should have been asleep. Most things seem to work, and I made superficial tests with alsa, sdl, and encode mode. This should cover most things, but there are a lot of tricky things that received no coverage. All this text means you should be prepared to roll back to an older commit and report your problem.
2020-05-24 23:53:41 +00:00
int copy = mp_aframe_get_size(p->pending);
uint8_t **fdata = mp_aframe_get_data_ro(p->pending);
copy = MPMIN(copy, samples - pos);
for (int n = 0; n < ao->num_planes; n++) {
memcpy((char *)data[n] + pos * ao->sstride,
fdata[n], copy * ao->sstride);
audio: merge pull/push ring buffer glue code This is preparation to further cleanups (and eventually actual improvements) of the audio output code. AOs are split into two classes: pull and push. Pull AOs let an audio callback of the native audio API read from a ring buffer. Push AOs expose a function that works similar to write(), and for which we start a "feeder" thread. It seems making this split was beneficial, because of the different data flow, and emulating the one or other in the AOs directly would have created code duplication (all the "pull" AOs had their own ring buffer implementation before it was cleaned up). Unfortunately, both types had completely separate implementations (in pull.c and push.c). The idea was that little can be shared anyway. But that's very annoying now, because I want to change the API between AO and player. This commit attempts to merge them. I've moved everything from push.c to pull.c, the trivial entrypoints from ao.c to pull.c, and attempted to reconcile the differences. It's a mess, but at least there's only one ring buffer within the AO code now. Everything should work mostly the same. Pull AOs now always copy the audio data under a lock; before this commit, all ring buffer access was lock-free (except for the decoder wakeup callback, which acquired a mutex). In theory, this is "bad", and people obsessed with lock-free stuff will hate me, but in practice probably won't matter. The planned change will probably remove this copying-under-lock again, but who knows when this will happen. One change for the push AOs now makes it drop audio, where before only a warning was logged. This is only in case of AOs or drivers which exhibit unexpected (and now unsupported) behavior. This is a risky change. Although it's completely trivial conceptually, there are too many special cases. In addition, I barely tested it, and I've messed with it in a half-motivated state over a longer time, barely making any progress, and finishing it under a rush when I already should have been asleep. Most things seem to work, and I made superficial tests with alsa, sdl, and encode mode. This should cover most things, but there are a lot of tricky things that received no coverage. All this text means you should be prepared to roll back to an older commit and report your problem.
2020-05-24 23:53:41 +00:00
}
mp_aframe_skip_samples(p->pending, copy);
pos += copy;
*eof = false;
}
audio: merge pull/push ring buffer glue code This is preparation to further cleanups (and eventually actual improvements) of the audio output code. AOs are split into two classes: pull and push. Pull AOs let an audio callback of the native audio API read from a ring buffer. Push AOs expose a function that works similar to write(), and for which we start a "feeder" thread. It seems making this split was beneficial, because of the different data flow, and emulating the one or other in the AOs directly would have created code duplication (all the "pull" AOs had their own ring buffer implementation before it was cleaned up). Unfortunately, both types had completely separate implementations (in pull.c and push.c). The idea was that little can be shared anyway. But that's very annoying now, because I want to change the API between AO and player. This commit attempts to merge them. I've moved everything from push.c to pull.c, the trivial entrypoints from ao.c to pull.c, and attempted to reconcile the differences. It's a mess, but at least there's only one ring buffer within the AO code now. Everything should work mostly the same. Pull AOs now always copy the audio data under a lock; before this commit, all ring buffer access was lock-free (except for the decoder wakeup callback, which acquired a mutex). In theory, this is "bad", and people obsessed with lock-free stuff will hate me, but in practice probably won't matter. The planned change will probably remove this copying-under-lock again, but who knows when this will happen. One change for the push AOs now makes it drop audio, where before only a warning was logged. This is only in case of AOs or drivers which exhibit unexpected (and now unsupported) behavior. This is a risky change. Although it's completely trivial conceptually, there are too many special cases. In addition, I barely tested it, and I've messed with it in a half-motivated state over a longer time, barely making any progress, and finishing it under a rush when I already should have been asleep. Most things seem to work, and I made superficial tests with alsa, sdl, and encode mode. This should cover most things, but there are a lot of tricky things that received no coverage. All this text means you should be prepared to roll back to an older commit and report your problem.
2020-05-24 23:53:41 +00:00
if (!data) {
if (!p->pending)
return 0;
void **pd = (void *)mp_aframe_get_data_rw(p->pending);
if (pd)
ao_post_process_data(ao, pd, mp_aframe_get_size(p->pending));
return 1;
audio: merge pull/push ring buffer glue code This is preparation to further cleanups (and eventually actual improvements) of the audio output code. AOs are split into two classes: pull and push. Pull AOs let an audio callback of the native audio API read from a ring buffer. Push AOs expose a function that works similar to write(), and for which we start a "feeder" thread. It seems making this split was beneficial, because of the different data flow, and emulating the one or other in the AOs directly would have created code duplication (all the "pull" AOs had their own ring buffer implementation before it was cleaned up). Unfortunately, both types had completely separate implementations (in pull.c and push.c). The idea was that little can be shared anyway. But that's very annoying now, because I want to change the API between AO and player. This commit attempts to merge them. I've moved everything from push.c to pull.c, the trivial entrypoints from ao.c to pull.c, and attempted to reconcile the differences. It's a mess, but at least there's only one ring buffer within the AO code now. Everything should work mostly the same. Pull AOs now always copy the audio data under a lock; before this commit, all ring buffer access was lock-free (except for the decoder wakeup callback, which acquired a mutex). In theory, this is "bad", and people obsessed with lock-free stuff will hate me, but in practice probably won't matter. The planned change will probably remove this copying-under-lock again, but who knows when this will happen. One change for the push AOs now makes it drop audio, where before only a warning was logged. This is only in case of AOs or drivers which exhibit unexpected (and now unsupported) behavior. This is a risky change. Although it's completely trivial conceptually, there are too many special cases. In addition, I barely tested it, and I've messed with it in a half-motivated state over a longer time, barely making any progress, and finishing it under a rush when I already should have been asleep. Most things seem to work, and I made superficial tests with alsa, sdl, and encode mode. This should cover most things, but there are a lot of tricky things that received no coverage. All this text means you should be prepared to roll back to an older commit and report your problem.
2020-05-24 23:53:41 +00:00
}
// pad with silence (underflow/paused/eof)
if (pad_silence) {
for (int n = 0; n < ao->num_planes; n++) {
af_fill_silence((char *)data[n] + pos * ao->sstride,
(samples - pos) * ao->sstride,
ao->format);
}
}
ao_post_process_data(ao, data, pos);
return pos;
audio: merge pull/push ring buffer glue code This is preparation to further cleanups (and eventually actual improvements) of the audio output code. AOs are split into two classes: pull and push. Pull AOs let an audio callback of the native audio API read from a ring buffer. Push AOs expose a function that works similar to write(), and for which we start a "feeder" thread. It seems making this split was beneficial, because of the different data flow, and emulating the one or other in the AOs directly would have created code duplication (all the "pull" AOs had their own ring buffer implementation before it was cleaned up). Unfortunately, both types had completely separate implementations (in pull.c and push.c). The idea was that little can be shared anyway. But that's very annoying now, because I want to change the API between AO and player. This commit attempts to merge them. I've moved everything from push.c to pull.c, the trivial entrypoints from ao.c to pull.c, and attempted to reconcile the differences. It's a mess, but at least there's only one ring buffer within the AO code now. Everything should work mostly the same. Pull AOs now always copy the audio data under a lock; before this commit, all ring buffer access was lock-free (except for the decoder wakeup callback, which acquired a mutex). In theory, this is "bad", and people obsessed with lock-free stuff will hate me, but in practice probably won't matter. The planned change will probably remove this copying-under-lock again, but who knows when this will happen. One change for the push AOs now makes it drop audio, where before only a warning was logged. This is only in case of AOs or drivers which exhibit unexpected (and now unsupported) behavior. This is a risky change. Although it's completely trivial conceptually, there are too many special cases. In addition, I barely tested it, and I've messed with it in a half-motivated state over a longer time, barely making any progress, and finishing it under a rush when I already should have been asleep. Most things seem to work, and I made superficial tests with alsa, sdl, and encode mode. This should cover most things, but there are a lot of tricky things that received no coverage. All this text means you should be prepared to roll back to an older commit and report your problem.
2020-05-24 23:53:41 +00:00
}
static int ao_read_data_locked(struct ao *ao, void **data, int samples,
int64_t out_time_ns, bool pad_silence)
{
struct buffer_state *p = ao->buffer_state;
assert(!ao->driver->write);
int pos = read_buffer(ao, data, samples, &(bool){0}, pad_silence);
if (pos > 0)
p->end_time_ns = out_time_ns;
if (pos < samples && p->playing && !p->paused) {
p->playing = false;
ao->wakeup_cb(ao->wakeup_ctx);
// For ao_drain().
mp_cond_broadcast(&p->wakeup);
}
return pos;
}
audio: merge pull/push ring buffer glue code This is preparation to further cleanups (and eventually actual improvements) of the audio output code. AOs are split into two classes: pull and push. Pull AOs let an audio callback of the native audio API read from a ring buffer. Push AOs expose a function that works similar to write(), and for which we start a "feeder" thread. It seems making this split was beneficial, because of the different data flow, and emulating the one or other in the AOs directly would have created code duplication (all the "pull" AOs had their own ring buffer implementation before it was cleaned up). Unfortunately, both types had completely separate implementations (in pull.c and push.c). The idea was that little can be shared anyway. But that's very annoying now, because I want to change the API between AO and player. This commit attempts to merge them. I've moved everything from push.c to pull.c, the trivial entrypoints from ao.c to pull.c, and attempted to reconcile the differences. It's a mess, but at least there's only one ring buffer within the AO code now. Everything should work mostly the same. Pull AOs now always copy the audio data under a lock; before this commit, all ring buffer access was lock-free (except for the decoder wakeup callback, which acquired a mutex). In theory, this is "bad", and people obsessed with lock-free stuff will hate me, but in practice probably won't matter. The planned change will probably remove this copying-under-lock again, but who knows when this will happen. One change for the push AOs now makes it drop audio, where before only a warning was logged. This is only in case of AOs or drivers which exhibit unexpected (and now unsupported) behavior. This is a risky change. Although it's completely trivial conceptually, there are too many special cases. In addition, I barely tested it, and I've messed with it in a half-motivated state over a longer time, barely making any progress, and finishing it under a rush when I already should have been asleep. Most things seem to work, and I made superficial tests with alsa, sdl, and encode mode. This should cover most things, but there are a lot of tricky things that received no coverage. All this text means you should be prepared to roll back to an older commit and report your problem.
2020-05-24 23:53:41 +00:00
// Read the given amount of samples in the user-provided data buffer. Returns
// the number of samples copied. If there is not enough data (buffer underrun
// or EOF), return the number of samples that could be copied, and fill the
// rest of the user-provided buffer with silence.
// This basically assumes that the audio device doesn't care about underruns.
// If this is called in paused mode, it will always return 0.
// The caller should set out_time_ns to the expected delay until the last sample
// reaches the speakers, in nanoseconds, using mp_time_ns() as reference.
int ao_read_data(struct ao *ao, void **data, int samples, int64_t out_time_ns)
audio: merge pull/push ring buffer glue code This is preparation to further cleanups (and eventually actual improvements) of the audio output code. AOs are split into two classes: pull and push. Pull AOs let an audio callback of the native audio API read from a ring buffer. Push AOs expose a function that works similar to write(), and for which we start a "feeder" thread. It seems making this split was beneficial, because of the different data flow, and emulating the one or other in the AOs directly would have created code duplication (all the "pull" AOs had their own ring buffer implementation before it was cleaned up). Unfortunately, both types had completely separate implementations (in pull.c and push.c). The idea was that little can be shared anyway. But that's very annoying now, because I want to change the API between AO and player. This commit attempts to merge them. I've moved everything from push.c to pull.c, the trivial entrypoints from ao.c to pull.c, and attempted to reconcile the differences. It's a mess, but at least there's only one ring buffer within the AO code now. Everything should work mostly the same. Pull AOs now always copy the audio data under a lock; before this commit, all ring buffer access was lock-free (except for the decoder wakeup callback, which acquired a mutex). In theory, this is "bad", and people obsessed with lock-free stuff will hate me, but in practice probably won't matter. The planned change will probably remove this copying-under-lock again, but who knows when this will happen. One change for the push AOs now makes it drop audio, where before only a warning was logged. This is only in case of AOs or drivers which exhibit unexpected (and now unsupported) behavior. This is a risky change. Although it's completely trivial conceptually, there are too many special cases. In addition, I barely tested it, and I've messed with it in a half-motivated state over a longer time, barely making any progress, and finishing it under a rush when I already should have been asleep. Most things seem to work, and I made superficial tests with alsa, sdl, and encode mode. This should cover most things, but there are a lot of tricky things that received no coverage. All this text means you should be prepared to roll back to an older commit and report your problem.
2020-05-24 23:53:41 +00:00
{
struct buffer_state *p = ao->buffer_state;
2023-10-21 02:55:41 +00:00
mp_mutex_lock(&p->lock);
audio: merge pull/push ring buffer glue code This is preparation to further cleanups (and eventually actual improvements) of the audio output code. AOs are split into two classes: pull and push. Pull AOs let an audio callback of the native audio API read from a ring buffer. Push AOs expose a function that works similar to write(), and for which we start a "feeder" thread. It seems making this split was beneficial, because of the different data flow, and emulating the one or other in the AOs directly would have created code duplication (all the "pull" AOs had their own ring buffer implementation before it was cleaned up). Unfortunately, both types had completely separate implementations (in pull.c and push.c). The idea was that little can be shared anyway. But that's very annoying now, because I want to change the API between AO and player. This commit attempts to merge them. I've moved everything from push.c to pull.c, the trivial entrypoints from ao.c to pull.c, and attempted to reconcile the differences. It's a mess, but at least there's only one ring buffer within the AO code now. Everything should work mostly the same. Pull AOs now always copy the audio data under a lock; before this commit, all ring buffer access was lock-free (except for the decoder wakeup callback, which acquired a mutex). In theory, this is "bad", and people obsessed with lock-free stuff will hate me, but in practice probably won't matter. The planned change will probably remove this copying-under-lock again, but who knows when this will happen. One change for the push AOs now makes it drop audio, where before only a warning was logged. This is only in case of AOs or drivers which exhibit unexpected (and now unsupported) behavior. This is a risky change. Although it's completely trivial conceptually, there are too many special cases. In addition, I barely tested it, and I've messed with it in a half-motivated state over a longer time, barely making any progress, and finishing it under a rush when I already should have been asleep. Most things seem to work, and I made superficial tests with alsa, sdl, and encode mode. This should cover most things, but there are a lot of tricky things that received no coverage. All this text means you should be prepared to roll back to an older commit and report your problem.
2020-05-24 23:53:41 +00:00
int pos = ao_read_data_locked(ao, data, samples, out_time_ns, true);
audio: merge pull/push ring buffer glue code This is preparation to further cleanups (and eventually actual improvements) of the audio output code. AOs are split into two classes: pull and push. Pull AOs let an audio callback of the native audio API read from a ring buffer. Push AOs expose a function that works similar to write(), and for which we start a "feeder" thread. It seems making this split was beneficial, because of the different data flow, and emulating the one or other in the AOs directly would have created code duplication (all the "pull" AOs had their own ring buffer implementation before it was cleaned up). Unfortunately, both types had completely separate implementations (in pull.c and push.c). The idea was that little can be shared anyway. But that's very annoying now, because I want to change the API between AO and player. This commit attempts to merge them. I've moved everything from push.c to pull.c, the trivial entrypoints from ao.c to pull.c, and attempted to reconcile the differences. It's a mess, but at least there's only one ring buffer within the AO code now. Everything should work mostly the same. Pull AOs now always copy the audio data under a lock; before this commit, all ring buffer access was lock-free (except for the decoder wakeup callback, which acquired a mutex). In theory, this is "bad", and people obsessed with lock-free stuff will hate me, but in practice probably won't matter. The planned change will probably remove this copying-under-lock again, but who knows when this will happen. One change for the push AOs now makes it drop audio, where before only a warning was logged. This is only in case of AOs or drivers which exhibit unexpected (and now unsupported) behavior. This is a risky change. Although it's completely trivial conceptually, there are too many special cases. In addition, I barely tested it, and I've messed with it in a half-motivated state over a longer time, barely making any progress, and finishing it under a rush when I already should have been asleep. Most things seem to work, and I made superficial tests with alsa, sdl, and encode mode. This should cover most things, but there are a lot of tricky things that received no coverage. All this text means you should be prepared to roll back to an older commit and report your problem.
2020-05-24 23:53:41 +00:00
mp_mutex_unlock(&p->lock);
audio: merge pull/push ring buffer glue code This is preparation to further cleanups (and eventually actual improvements) of the audio output code. AOs are split into two classes: pull and push. Pull AOs let an audio callback of the native audio API read from a ring buffer. Push AOs expose a function that works similar to write(), and for which we start a "feeder" thread. It seems making this split was beneficial, because of the different data flow, and emulating the one or other in the AOs directly would have created code duplication (all the "pull" AOs had their own ring buffer implementation before it was cleaned up). Unfortunately, both types had completely separate implementations (in pull.c and push.c). The idea was that little can be shared anyway. But that's very annoying now, because I want to change the API between AO and player. This commit attempts to merge them. I've moved everything from push.c to pull.c, the trivial entrypoints from ao.c to pull.c, and attempted to reconcile the differences. It's a mess, but at least there's only one ring buffer within the AO code now. Everything should work mostly the same. Pull AOs now always copy the audio data under a lock; before this commit, all ring buffer access was lock-free (except for the decoder wakeup callback, which acquired a mutex). In theory, this is "bad", and people obsessed with lock-free stuff will hate me, but in practice probably won't matter. The planned change will probably remove this copying-under-lock again, but who knows when this will happen. One change for the push AOs now makes it drop audio, where before only a warning was logged. This is only in case of AOs or drivers which exhibit unexpected (and now unsupported) behavior. This is a risky change. Although it's completely trivial conceptually, there are too many special cases. In addition, I barely tested it, and I've messed with it in a half-motivated state over a longer time, barely making any progress, and finishing it under a rush when I already should have been asleep. Most things seem to work, and I made superficial tests with alsa, sdl, and encode mode. This should cover most things, but there are a lot of tricky things that received no coverage. All this text means you should be prepared to roll back to an older commit and report your problem.
2020-05-24 23:53:41 +00:00
return pos;
}
// Like ao_read_data() but does not block and also may return partial data.
// Callers have to check the return value.
int ao_read_data_nonblocking(struct ao *ao, void **data, int samples, int64_t out_time_ns)
{
struct buffer_state *p = ao->buffer_state;
if (mp_mutex_trylock(&p->lock))
return 0;
int pos = ao_read_data_locked(ao, data, samples, out_time_ns, false);
audio: merge pull/push ring buffer glue code This is preparation to further cleanups (and eventually actual improvements) of the audio output code. AOs are split into two classes: pull and push. Pull AOs let an audio callback of the native audio API read from a ring buffer. Push AOs expose a function that works similar to write(), and for which we start a "feeder" thread. It seems making this split was beneficial, because of the different data flow, and emulating the one or other in the AOs directly would have created code duplication (all the "pull" AOs had their own ring buffer implementation before it was cleaned up). Unfortunately, both types had completely separate implementations (in pull.c and push.c). The idea was that little can be shared anyway. But that's very annoying now, because I want to change the API between AO and player. This commit attempts to merge them. I've moved everything from push.c to pull.c, the trivial entrypoints from ao.c to pull.c, and attempted to reconcile the differences. It's a mess, but at least there's only one ring buffer within the AO code now. Everything should work mostly the same. Pull AOs now always copy the audio data under a lock; before this commit, all ring buffer access was lock-free (except for the decoder wakeup callback, which acquired a mutex). In theory, this is "bad", and people obsessed with lock-free stuff will hate me, but in practice probably won't matter. The planned change will probably remove this copying-under-lock again, but who knows when this will happen. One change for the push AOs now makes it drop audio, where before only a warning was logged. This is only in case of AOs or drivers which exhibit unexpected (and now unsupported) behavior. This is a risky change. Although it's completely trivial conceptually, there are too many special cases. In addition, I barely tested it, and I've messed with it in a half-motivated state over a longer time, barely making any progress, and finishing it under a rush when I already should have been asleep. Most things seem to work, and I made superficial tests with alsa, sdl, and encode mode. This should cover most things, but there are a lot of tricky things that received no coverage. All this text means you should be prepared to roll back to an older commit and report your problem.
2020-05-24 23:53:41 +00:00
2023-10-21 02:55:41 +00:00
mp_mutex_unlock(&p->lock);
audio: merge pull/push ring buffer glue code This is preparation to further cleanups (and eventually actual improvements) of the audio output code. AOs are split into two classes: pull and push. Pull AOs let an audio callback of the native audio API read from a ring buffer. Push AOs expose a function that works similar to write(), and for which we start a "feeder" thread. It seems making this split was beneficial, because of the different data flow, and emulating the one or other in the AOs directly would have created code duplication (all the "pull" AOs had their own ring buffer implementation before it was cleaned up). Unfortunately, both types had completely separate implementations (in pull.c and push.c). The idea was that little can be shared anyway. But that's very annoying now, because I want to change the API between AO and player. This commit attempts to merge them. I've moved everything from push.c to pull.c, the trivial entrypoints from ao.c to pull.c, and attempted to reconcile the differences. It's a mess, but at least there's only one ring buffer within the AO code now. Everything should work mostly the same. Pull AOs now always copy the audio data under a lock; before this commit, all ring buffer access was lock-free (except for the decoder wakeup callback, which acquired a mutex). In theory, this is "bad", and people obsessed with lock-free stuff will hate me, but in practice probably won't matter. The planned change will probably remove this copying-under-lock again, but who knows when this will happen. One change for the push AOs now makes it drop audio, where before only a warning was logged. This is only in case of AOs or drivers which exhibit unexpected (and now unsupported) behavior. This is a risky change. Although it's completely trivial conceptually, there are too many special cases. In addition, I barely tested it, and I've messed with it in a half-motivated state over a longer time, barely making any progress, and finishing it under a rush when I already should have been asleep. Most things seem to work, and I made superficial tests with alsa, sdl, and encode mode. This should cover most things, but there are a lot of tricky things that received no coverage. All this text means you should be prepared to roll back to an older commit and report your problem.
2020-05-24 23:53:41 +00:00
return pos;
audio: merge pull/push ring buffer glue code This is preparation to further cleanups (and eventually actual improvements) of the audio output code. AOs are split into two classes: pull and push. Pull AOs let an audio callback of the native audio API read from a ring buffer. Push AOs expose a function that works similar to write(), and for which we start a "feeder" thread. It seems making this split was beneficial, because of the different data flow, and emulating the one or other in the AOs directly would have created code duplication (all the "pull" AOs had their own ring buffer implementation before it was cleaned up). Unfortunately, both types had completely separate implementations (in pull.c and push.c). The idea was that little can be shared anyway. But that's very annoying now, because I want to change the API between AO and player. This commit attempts to merge them. I've moved everything from push.c to pull.c, the trivial entrypoints from ao.c to pull.c, and attempted to reconcile the differences. It's a mess, but at least there's only one ring buffer within the AO code now. Everything should work mostly the same. Pull AOs now always copy the audio data under a lock; before this commit, all ring buffer access was lock-free (except for the decoder wakeup callback, which acquired a mutex). In theory, this is "bad", and people obsessed with lock-free stuff will hate me, but in practice probably won't matter. The planned change will probably remove this copying-under-lock again, but who knows when this will happen. One change for the push AOs now makes it drop audio, where before only a warning was logged. This is only in case of AOs or drivers which exhibit unexpected (and now unsupported) behavior. This is a risky change. Although it's completely trivial conceptually, there are too many special cases. In addition, I barely tested it, and I've messed with it in a half-motivated state over a longer time, barely making any progress, and finishing it under a rush when I already should have been asleep. Most things seem to work, and I made superficial tests with alsa, sdl, and encode mode. This should cover most things, but there are a lot of tricky things that received no coverage. All this text means you should be prepared to roll back to an older commit and report your problem.
2020-05-24 23:53:41 +00:00
}
// Same as ao_read_data(), but convert data according to *fmt.
// fmt->src_fmt and fmt->channels must be the same as the AO parameters.
int ao_read_data_converted(struct ao *ao, struct ao_convert_fmt *fmt,
void **data, int samples, int64_t out_time_ns)
audio: merge pull/push ring buffer glue code This is preparation to further cleanups (and eventually actual improvements) of the audio output code. AOs are split into two classes: pull and push. Pull AOs let an audio callback of the native audio API read from a ring buffer. Push AOs expose a function that works similar to write(), and for which we start a "feeder" thread. It seems making this split was beneficial, because of the different data flow, and emulating the one or other in the AOs directly would have created code duplication (all the "pull" AOs had their own ring buffer implementation before it was cleaned up). Unfortunately, both types had completely separate implementations (in pull.c and push.c). The idea was that little can be shared anyway. But that's very annoying now, because I want to change the API between AO and player. This commit attempts to merge them. I've moved everything from push.c to pull.c, the trivial entrypoints from ao.c to pull.c, and attempted to reconcile the differences. It's a mess, but at least there's only one ring buffer within the AO code now. Everything should work mostly the same. Pull AOs now always copy the audio data under a lock; before this commit, all ring buffer access was lock-free (except for the decoder wakeup callback, which acquired a mutex). In theory, this is "bad", and people obsessed with lock-free stuff will hate me, but in practice probably won't matter. The planned change will probably remove this copying-under-lock again, but who knows when this will happen. One change for the push AOs now makes it drop audio, where before only a warning was logged. This is only in case of AOs or drivers which exhibit unexpected (and now unsupported) behavior. This is a risky change. Although it's completely trivial conceptually, there are too many special cases. In addition, I barely tested it, and I've messed with it in a half-motivated state over a longer time, barely making any progress, and finishing it under a rush when I already should have been asleep. Most things seem to work, and I made superficial tests with alsa, sdl, and encode mode. This should cover most things, but there are a lot of tricky things that received no coverage. All this text means you should be prepared to roll back to an older commit and report your problem.
2020-05-24 23:53:41 +00:00
{
struct buffer_state *p = ao->buffer_state;
void *ndata[MP_NUM_CHANNELS] = {0};
if (!ao_need_conversion(fmt))
return ao_read_data(ao, data, samples, out_time_ns);
audio: merge pull/push ring buffer glue code This is preparation to further cleanups (and eventually actual improvements) of the audio output code. AOs are split into two classes: pull and push. Pull AOs let an audio callback of the native audio API read from a ring buffer. Push AOs expose a function that works similar to write(), and for which we start a "feeder" thread. It seems making this split was beneficial, because of the different data flow, and emulating the one or other in the AOs directly would have created code duplication (all the "pull" AOs had their own ring buffer implementation before it was cleaned up). Unfortunately, both types had completely separate implementations (in pull.c and push.c). The idea was that little can be shared anyway. But that's very annoying now, because I want to change the API between AO and player. This commit attempts to merge them. I've moved everything from push.c to pull.c, the trivial entrypoints from ao.c to pull.c, and attempted to reconcile the differences. It's a mess, but at least there's only one ring buffer within the AO code now. Everything should work mostly the same. Pull AOs now always copy the audio data under a lock; before this commit, all ring buffer access was lock-free (except for the decoder wakeup callback, which acquired a mutex). In theory, this is "bad", and people obsessed with lock-free stuff will hate me, but in practice probably won't matter. The planned change will probably remove this copying-under-lock again, but who knows when this will happen. One change for the push AOs now makes it drop audio, where before only a warning was logged. This is only in case of AOs or drivers which exhibit unexpected (and now unsupported) behavior. This is a risky change. Although it's completely trivial conceptually, there are too many special cases. In addition, I barely tested it, and I've messed with it in a half-motivated state over a longer time, barely making any progress, and finishing it under a rush when I already should have been asleep. Most things seem to work, and I made superficial tests with alsa, sdl, and encode mode. This should cover most things, but there are a lot of tricky things that received no coverage. All this text means you should be prepared to roll back to an older commit and report your problem.
2020-05-24 23:53:41 +00:00
assert(ao->format == fmt->src_fmt);
assert(ao->channels.num == fmt->channels);
bool planar = af_fmt_is_planar(fmt->src_fmt);
int planes = planar ? fmt->channels : 1;
int plane_samples = samples * (planar ? 1: fmt->channels);
int src_plane_size = plane_samples * af_fmt_to_bytes(fmt->src_fmt);
int dst_plane_size = plane_samples * fmt->dst_bits / 8;
int needed = src_plane_size * planes;
if (needed > talloc_get_size(p->convert_buffer) || !p->convert_buffer) {
talloc_free(p->convert_buffer);
p->convert_buffer = talloc_size(NULL, needed);
}
for (int n = 0; n < planes; n++)
ndata[n] = p->convert_buffer + n * src_plane_size;
int res = ao_read_data(ao, ndata, samples, out_time_ns);
audio: merge pull/push ring buffer glue code This is preparation to further cleanups (and eventually actual improvements) of the audio output code. AOs are split into two classes: pull and push. Pull AOs let an audio callback of the native audio API read from a ring buffer. Push AOs expose a function that works similar to write(), and for which we start a "feeder" thread. It seems making this split was beneficial, because of the different data flow, and emulating the one or other in the AOs directly would have created code duplication (all the "pull" AOs had their own ring buffer implementation before it was cleaned up). Unfortunately, both types had completely separate implementations (in pull.c and push.c). The idea was that little can be shared anyway. But that's very annoying now, because I want to change the API between AO and player. This commit attempts to merge them. I've moved everything from push.c to pull.c, the trivial entrypoints from ao.c to pull.c, and attempted to reconcile the differences. It's a mess, but at least there's only one ring buffer within the AO code now. Everything should work mostly the same. Pull AOs now always copy the audio data under a lock; before this commit, all ring buffer access was lock-free (except for the decoder wakeup callback, which acquired a mutex). In theory, this is "bad", and people obsessed with lock-free stuff will hate me, but in practice probably won't matter. The planned change will probably remove this copying-under-lock again, but who knows when this will happen. One change for the push AOs now makes it drop audio, where before only a warning was logged. This is only in case of AOs or drivers which exhibit unexpected (and now unsupported) behavior. This is a risky change. Although it's completely trivial conceptually, there are too many special cases. In addition, I barely tested it, and I've messed with it in a half-motivated state over a longer time, barely making any progress, and finishing it under a rush when I already should have been asleep. Most things seem to work, and I made superficial tests with alsa, sdl, and encode mode. This should cover most things, but there are a lot of tricky things that received no coverage. All this text means you should be prepared to roll back to an older commit and report your problem.
2020-05-24 23:53:41 +00:00
ao_convert_inplace(fmt, ndata, samples);
for (int n = 0; n < planes; n++)
memcpy(data[n], ndata[n], dst_plane_size);
return res;
}
int ao_control(struct ao *ao, enum aocontrol cmd, void *arg)
{
struct buffer_state *p = ao->buffer_state;
int r = CONTROL_UNKNOWN;
if (ao->driver->control) {
// Only need to lock in push mode.
if (ao->driver->write)
2023-10-21 02:55:41 +00:00
mp_mutex_lock(&p->lock);
audio: merge pull/push ring buffer glue code This is preparation to further cleanups (and eventually actual improvements) of the audio output code. AOs are split into two classes: pull and push. Pull AOs let an audio callback of the native audio API read from a ring buffer. Push AOs expose a function that works similar to write(), and for which we start a "feeder" thread. It seems making this split was beneficial, because of the different data flow, and emulating the one or other in the AOs directly would have created code duplication (all the "pull" AOs had their own ring buffer implementation before it was cleaned up). Unfortunately, both types had completely separate implementations (in pull.c and push.c). The idea was that little can be shared anyway. But that's very annoying now, because I want to change the API between AO and player. This commit attempts to merge them. I've moved everything from push.c to pull.c, the trivial entrypoints from ao.c to pull.c, and attempted to reconcile the differences. It's a mess, but at least there's only one ring buffer within the AO code now. Everything should work mostly the same. Pull AOs now always copy the audio data under a lock; before this commit, all ring buffer access was lock-free (except for the decoder wakeup callback, which acquired a mutex). In theory, this is "bad", and people obsessed with lock-free stuff will hate me, but in practice probably won't matter. The planned change will probably remove this copying-under-lock again, but who knows when this will happen. One change for the push AOs now makes it drop audio, where before only a warning was logged. This is only in case of AOs or drivers which exhibit unexpected (and now unsupported) behavior. This is a risky change. Although it's completely trivial conceptually, there are too many special cases. In addition, I barely tested it, and I've messed with it in a half-motivated state over a longer time, barely making any progress, and finishing it under a rush when I already should have been asleep. Most things seem to work, and I made superficial tests with alsa, sdl, and encode mode. This should cover most things, but there are a lot of tricky things that received no coverage. All this text means you should be prepared to roll back to an older commit and report your problem.
2020-05-24 23:53:41 +00:00
r = ao->driver->control(ao, cmd, arg);
if (ao->driver->write)
2023-10-21 02:55:41 +00:00
mp_mutex_unlock(&p->lock);
audio: merge pull/push ring buffer glue code This is preparation to further cleanups (and eventually actual improvements) of the audio output code. AOs are split into two classes: pull and push. Pull AOs let an audio callback of the native audio API read from a ring buffer. Push AOs expose a function that works similar to write(), and for which we start a "feeder" thread. It seems making this split was beneficial, because of the different data flow, and emulating the one or other in the AOs directly would have created code duplication (all the "pull" AOs had their own ring buffer implementation before it was cleaned up). Unfortunately, both types had completely separate implementations (in pull.c and push.c). The idea was that little can be shared anyway. But that's very annoying now, because I want to change the API between AO and player. This commit attempts to merge them. I've moved everything from push.c to pull.c, the trivial entrypoints from ao.c to pull.c, and attempted to reconcile the differences. It's a mess, but at least there's only one ring buffer within the AO code now. Everything should work mostly the same. Pull AOs now always copy the audio data under a lock; before this commit, all ring buffer access was lock-free (except for the decoder wakeup callback, which acquired a mutex). In theory, this is "bad", and people obsessed with lock-free stuff will hate me, but in practice probably won't matter. The planned change will probably remove this copying-under-lock again, but who knows when this will happen. One change for the push AOs now makes it drop audio, where before only a warning was logged. This is only in case of AOs or drivers which exhibit unexpected (and now unsupported) behavior. This is a risky change. Although it's completely trivial conceptually, there are too many special cases. In addition, I barely tested it, and I've messed with it in a half-motivated state over a longer time, barely making any progress, and finishing it under a rush when I already should have been asleep. Most things seem to work, and I made superficial tests with alsa, sdl, and encode mode. This should cover most things, but there are a lot of tricky things that received no coverage. All this text means you should be prepared to roll back to an older commit and report your problem.
2020-05-24 23:53:41 +00:00
}
return r;
}
double ao_get_delay(struct ao *ao)
audio: merge pull/push ring buffer glue code This is preparation to further cleanups (and eventually actual improvements) of the audio output code. AOs are split into two classes: pull and push. Pull AOs let an audio callback of the native audio API read from a ring buffer. Push AOs expose a function that works similar to write(), and for which we start a "feeder" thread. It seems making this split was beneficial, because of the different data flow, and emulating the one or other in the AOs directly would have created code duplication (all the "pull" AOs had their own ring buffer implementation before it was cleaned up). Unfortunately, both types had completely separate implementations (in pull.c and push.c). The idea was that little can be shared anyway. But that's very annoying now, because I want to change the API between AO and player. This commit attempts to merge them. I've moved everything from push.c to pull.c, the trivial entrypoints from ao.c to pull.c, and attempted to reconcile the differences. It's a mess, but at least there's only one ring buffer within the AO code now. Everything should work mostly the same. Pull AOs now always copy the audio data under a lock; before this commit, all ring buffer access was lock-free (except for the decoder wakeup callback, which acquired a mutex). In theory, this is "bad", and people obsessed with lock-free stuff will hate me, but in practice probably won't matter. The planned change will probably remove this copying-under-lock again, but who knows when this will happen. One change for the push AOs now makes it drop audio, where before only a warning was logged. This is only in case of AOs or drivers which exhibit unexpected (and now unsupported) behavior. This is a risky change. Although it's completely trivial conceptually, there are too many special cases. In addition, I barely tested it, and I've messed with it in a half-motivated state over a longer time, barely making any progress, and finishing it under a rush when I already should have been asleep. Most things seem to work, and I made superficial tests with alsa, sdl, and encode mode. This should cover most things, but there are a lot of tricky things that received no coverage. All this text means you should be prepared to roll back to an older commit and report your problem.
2020-05-24 23:53:41 +00:00
{
struct buffer_state *p = ao->buffer_state;
2023-10-21 02:55:41 +00:00
mp_mutex_lock(&p->lock);
double driver_delay;
if (ao->driver->write) {
struct mp_pcm_state state;
get_dev_state(ao, &state);
driver_delay = state.delay;
} else {
int64_t end = p->end_time_ns;
int64_t now = mp_time_ns();
driver_delay = MPMAX(0, MP_TIME_NS_TO_S(end - now));
audio: merge pull/push ring buffer glue code This is preparation to further cleanups (and eventually actual improvements) of the audio output code. AOs are split into two classes: pull and push. Pull AOs let an audio callback of the native audio API read from a ring buffer. Push AOs expose a function that works similar to write(), and for which we start a "feeder" thread. It seems making this split was beneficial, because of the different data flow, and emulating the one or other in the AOs directly would have created code duplication (all the "pull" AOs had their own ring buffer implementation before it was cleaned up). Unfortunately, both types had completely separate implementations (in pull.c and push.c). The idea was that little can be shared anyway. But that's very annoying now, because I want to change the API between AO and player. This commit attempts to merge them. I've moved everything from push.c to pull.c, the trivial entrypoints from ao.c to pull.c, and attempted to reconcile the differences. It's a mess, but at least there's only one ring buffer within the AO code now. Everything should work mostly the same. Pull AOs now always copy the audio data under a lock; before this commit, all ring buffer access was lock-free (except for the decoder wakeup callback, which acquired a mutex). In theory, this is "bad", and people obsessed with lock-free stuff will hate me, but in practice probably won't matter. The planned change will probably remove this copying-under-lock again, but who knows when this will happen. One change for the push AOs now makes it drop audio, where before only a warning was logged. This is only in case of AOs or drivers which exhibit unexpected (and now unsupported) behavior. This is a risky change. Although it's completely trivial conceptually, there are too many special cases. In addition, I barely tested it, and I've messed with it in a half-motivated state over a longer time, barely making any progress, and finishing it under a rush when I already should have been asleep. Most things seem to work, and I made superficial tests with alsa, sdl, and encode mode. This should cover most things, but there are a lot of tricky things that received no coverage. All this text means you should be prepared to roll back to an older commit and report your problem.
2020-05-24 23:53:41 +00:00
}
int pending = mp_async_queue_get_samples(p->queue);
if (p->pending)
pending += mp_aframe_get_size(p->pending);
audio: merge pull/push ring buffer glue code This is preparation to further cleanups (and eventually actual improvements) of the audio output code. AOs are split into two classes: pull and push. Pull AOs let an audio callback of the native audio API read from a ring buffer. Push AOs expose a function that works similar to write(), and for which we start a "feeder" thread. It seems making this split was beneficial, because of the different data flow, and emulating the one or other in the AOs directly would have created code duplication (all the "pull" AOs had their own ring buffer implementation before it was cleaned up). Unfortunately, both types had completely separate implementations (in pull.c and push.c). The idea was that little can be shared anyway. But that's very annoying now, because I want to change the API between AO and player. This commit attempts to merge them. I've moved everything from push.c to pull.c, the trivial entrypoints from ao.c to pull.c, and attempted to reconcile the differences. It's a mess, but at least there's only one ring buffer within the AO code now. Everything should work mostly the same. Pull AOs now always copy the audio data under a lock; before this commit, all ring buffer access was lock-free (except for the decoder wakeup callback, which acquired a mutex). In theory, this is "bad", and people obsessed with lock-free stuff will hate me, but in practice probably won't matter. The planned change will probably remove this copying-under-lock again, but who knows when this will happen. One change for the push AOs now makes it drop audio, where before only a warning was logged. This is only in case of AOs or drivers which exhibit unexpected (and now unsupported) behavior. This is a risky change. Although it's completely trivial conceptually, there are too many special cases. In addition, I barely tested it, and I've messed with it in a half-motivated state over a longer time, barely making any progress, and finishing it under a rush when I already should have been asleep. Most things seem to work, and I made superficial tests with alsa, sdl, and encode mode. This should cover most things, but there are a lot of tricky things that received no coverage. All this text means you should be prepared to roll back to an older commit and report your problem.
2020-05-24 23:53:41 +00:00
2023-10-21 02:55:41 +00:00
mp_mutex_unlock(&p->lock);
return driver_delay + pending / (double)ao->samplerate;
audio: merge pull/push ring buffer glue code This is preparation to further cleanups (and eventually actual improvements) of the audio output code. AOs are split into two classes: pull and push. Pull AOs let an audio callback of the native audio API read from a ring buffer. Push AOs expose a function that works similar to write(), and for which we start a "feeder" thread. It seems making this split was beneficial, because of the different data flow, and emulating the one or other in the AOs directly would have created code duplication (all the "pull" AOs had their own ring buffer implementation before it was cleaned up). Unfortunately, both types had completely separate implementations (in pull.c and push.c). The idea was that little can be shared anyway. But that's very annoying now, because I want to change the API between AO and player. This commit attempts to merge them. I've moved everything from push.c to pull.c, the trivial entrypoints from ao.c to pull.c, and attempted to reconcile the differences. It's a mess, but at least there's only one ring buffer within the AO code now. Everything should work mostly the same. Pull AOs now always copy the audio data under a lock; before this commit, all ring buffer access was lock-free (except for the decoder wakeup callback, which acquired a mutex). In theory, this is "bad", and people obsessed with lock-free stuff will hate me, but in practice probably won't matter. The planned change will probably remove this copying-under-lock again, but who knows when this will happen. One change for the push AOs now makes it drop audio, where before only a warning was logged. This is only in case of AOs or drivers which exhibit unexpected (and now unsupported) behavior. This is a risky change. Although it's completely trivial conceptually, there are too many special cases. In addition, I barely tested it, and I've messed with it in a half-motivated state over a longer time, barely making any progress, and finishing it under a rush when I already should have been asleep. Most things seem to work, and I made superficial tests with alsa, sdl, and encode mode. This should cover most things, but there are a lot of tricky things that received no coverage. All this text means you should be prepared to roll back to an older commit and report your problem.
2020-05-24 23:53:41 +00:00
}
// Fully stop playback; clear buffers, including queue.
audio: merge pull/push ring buffer glue code This is preparation to further cleanups (and eventually actual improvements) of the audio output code. AOs are split into two classes: pull and push. Pull AOs let an audio callback of the native audio API read from a ring buffer. Push AOs expose a function that works similar to write(), and for which we start a "feeder" thread. It seems making this split was beneficial, because of the different data flow, and emulating the one or other in the AOs directly would have created code duplication (all the "pull" AOs had their own ring buffer implementation before it was cleaned up). Unfortunately, both types had completely separate implementations (in pull.c and push.c). The idea was that little can be shared anyway. But that's very annoying now, because I want to change the API between AO and player. This commit attempts to merge them. I've moved everything from push.c to pull.c, the trivial entrypoints from ao.c to pull.c, and attempted to reconcile the differences. It's a mess, but at least there's only one ring buffer within the AO code now. Everything should work mostly the same. Pull AOs now always copy the audio data under a lock; before this commit, all ring buffer access was lock-free (except for the decoder wakeup callback, which acquired a mutex). In theory, this is "bad", and people obsessed with lock-free stuff will hate me, but in practice probably won't matter. The planned change will probably remove this copying-under-lock again, but who knows when this will happen. One change for the push AOs now makes it drop audio, where before only a warning was logged. This is only in case of AOs or drivers which exhibit unexpected (and now unsupported) behavior. This is a risky change. Although it's completely trivial conceptually, there are too many special cases. In addition, I barely tested it, and I've messed with it in a half-motivated state over a longer time, barely making any progress, and finishing it under a rush when I already should have been asleep. Most things seem to work, and I made superficial tests with alsa, sdl, and encode mode. This should cover most things, but there are a lot of tricky things that received no coverage. All this text means you should be prepared to roll back to an older commit and report your problem.
2020-05-24 23:53:41 +00:00
void ao_reset(struct ao *ao)
{
struct buffer_state *p = ao->buffer_state;
bool wakeup = false;
bool do_reset = false;
audio: merge pull/push ring buffer glue code This is preparation to further cleanups (and eventually actual improvements) of the audio output code. AOs are split into two classes: pull and push. Pull AOs let an audio callback of the native audio API read from a ring buffer. Push AOs expose a function that works similar to write(), and for which we start a "feeder" thread. It seems making this split was beneficial, because of the different data flow, and emulating the one or other in the AOs directly would have created code duplication (all the "pull" AOs had their own ring buffer implementation before it was cleaned up). Unfortunately, both types had completely separate implementations (in pull.c and push.c). The idea was that little can be shared anyway. But that's very annoying now, because I want to change the API between AO and player. This commit attempts to merge them. I've moved everything from push.c to pull.c, the trivial entrypoints from ao.c to pull.c, and attempted to reconcile the differences. It's a mess, but at least there's only one ring buffer within the AO code now. Everything should work mostly the same. Pull AOs now always copy the audio data under a lock; before this commit, all ring buffer access was lock-free (except for the decoder wakeup callback, which acquired a mutex). In theory, this is "bad", and people obsessed with lock-free stuff will hate me, but in practice probably won't matter. The planned change will probably remove this copying-under-lock again, but who knows when this will happen. One change for the push AOs now makes it drop audio, where before only a warning was logged. This is only in case of AOs or drivers which exhibit unexpected (and now unsupported) behavior. This is a risky change. Although it's completely trivial conceptually, there are too many special cases. In addition, I barely tested it, and I've messed with it in a half-motivated state over a longer time, barely making any progress, and finishing it under a rush when I already should have been asleep. Most things seem to work, and I made superficial tests with alsa, sdl, and encode mode. This should cover most things, but there are a lot of tricky things that received no coverage. All this text means you should be prepared to roll back to an older commit and report your problem.
2020-05-24 23:53:41 +00:00
2023-10-21 02:55:41 +00:00
mp_mutex_lock(&p->lock);
audio: merge pull/push ring buffer glue code This is preparation to further cleanups (and eventually actual improvements) of the audio output code. AOs are split into two classes: pull and push. Pull AOs let an audio callback of the native audio API read from a ring buffer. Push AOs expose a function that works similar to write(), and for which we start a "feeder" thread. It seems making this split was beneficial, because of the different data flow, and emulating the one or other in the AOs directly would have created code duplication (all the "pull" AOs had their own ring buffer implementation before it was cleaned up). Unfortunately, both types had completely separate implementations (in pull.c and push.c). The idea was that little can be shared anyway. But that's very annoying now, because I want to change the API between AO and player. This commit attempts to merge them. I've moved everything from push.c to pull.c, the trivial entrypoints from ao.c to pull.c, and attempted to reconcile the differences. It's a mess, but at least there's only one ring buffer within the AO code now. Everything should work mostly the same. Pull AOs now always copy the audio data under a lock; before this commit, all ring buffer access was lock-free (except for the decoder wakeup callback, which acquired a mutex). In theory, this is "bad", and people obsessed with lock-free stuff will hate me, but in practice probably won't matter. The planned change will probably remove this copying-under-lock again, but who knows when this will happen. One change for the push AOs now makes it drop audio, where before only a warning was logged. This is only in case of AOs or drivers which exhibit unexpected (and now unsupported) behavior. This is a risky change. Although it's completely trivial conceptually, there are too many special cases. In addition, I barely tested it, and I've messed with it in a half-motivated state over a longer time, barely making any progress, and finishing it under a rush when I already should have been asleep. Most things seem to work, and I made superficial tests with alsa, sdl, and encode mode. This should cover most things, but there are a lot of tricky things that received no coverage. All this text means you should be prepared to roll back to an older commit and report your problem.
2020-05-24 23:53:41 +00:00
TA_FREEP(&p->pending);
mp_async_queue_reset(p->queue);
mp_filter_reset(p->filter_root);
mp_async_queue_resume_reading(p->queue);
audio: merge pull/push ring buffer glue code This is preparation to further cleanups (and eventually actual improvements) of the audio output code. AOs are split into two classes: pull and push. Pull AOs let an audio callback of the native audio API read from a ring buffer. Push AOs expose a function that works similar to write(), and for which we start a "feeder" thread. It seems making this split was beneficial, because of the different data flow, and emulating the one or other in the AOs directly would have created code duplication (all the "pull" AOs had their own ring buffer implementation before it was cleaned up). Unfortunately, both types had completely separate implementations (in pull.c and push.c). The idea was that little can be shared anyway. But that's very annoying now, because I want to change the API between AO and player. This commit attempts to merge them. I've moved everything from push.c to pull.c, the trivial entrypoints from ao.c to pull.c, and attempted to reconcile the differences. It's a mess, but at least there's only one ring buffer within the AO code now. Everything should work mostly the same. Pull AOs now always copy the audio data under a lock; before this commit, all ring buffer access was lock-free (except for the decoder wakeup callback, which acquired a mutex). In theory, this is "bad", and people obsessed with lock-free stuff will hate me, but in practice probably won't matter. The planned change will probably remove this copying-under-lock again, but who knows when this will happen. One change for the push AOs now makes it drop audio, where before only a warning was logged. This is only in case of AOs or drivers which exhibit unexpected (and now unsupported) behavior. This is a risky change. Although it's completely trivial conceptually, there are too many special cases. In addition, I barely tested it, and I've messed with it in a half-motivated state over a longer time, barely making any progress, and finishing it under a rush when I already should have been asleep. Most things seem to work, and I made superficial tests with alsa, sdl, and encode mode. This should cover most things, but there are a lot of tricky things that received no coverage. All this text means you should be prepared to roll back to an older commit and report your problem.
2020-05-24 23:53:41 +00:00
if (!ao->stream_silence && ao->driver->reset) {
if (ao->driver->write) {
ao->driver->reset(ao);
} else {
// Pull AOs may wait for ao_read_data() to return.
// That would deadlock if called from within the lock.
do_reset = true;
}
audio: merge pull/push ring buffer glue code This is preparation to further cleanups (and eventually actual improvements) of the audio output code. AOs are split into two classes: pull and push. Pull AOs let an audio callback of the native audio API read from a ring buffer. Push AOs expose a function that works similar to write(), and for which we start a "feeder" thread. It seems making this split was beneficial, because of the different data flow, and emulating the one or other in the AOs directly would have created code duplication (all the "pull" AOs had their own ring buffer implementation before it was cleaned up). Unfortunately, both types had completely separate implementations (in pull.c and push.c). The idea was that little can be shared anyway. But that's very annoying now, because I want to change the API between AO and player. This commit attempts to merge them. I've moved everything from push.c to pull.c, the trivial entrypoints from ao.c to pull.c, and attempted to reconcile the differences. It's a mess, but at least there's only one ring buffer within the AO code now. Everything should work mostly the same. Pull AOs now always copy the audio data under a lock; before this commit, all ring buffer access was lock-free (except for the decoder wakeup callback, which acquired a mutex). In theory, this is "bad", and people obsessed with lock-free stuff will hate me, but in practice probably won't matter. The planned change will probably remove this copying-under-lock again, but who knows when this will happen. One change for the push AOs now makes it drop audio, where before only a warning was logged. This is only in case of AOs or drivers which exhibit unexpected (and now unsupported) behavior. This is a risky change. Although it's completely trivial conceptually, there are too many special cases. In addition, I barely tested it, and I've messed with it in a half-motivated state over a longer time, barely making any progress, and finishing it under a rush when I already should have been asleep. Most things seem to work, and I made superficial tests with alsa, sdl, and encode mode. This should cover most things, but there are a lot of tricky things that received no coverage. All this text means you should be prepared to roll back to an older commit and report your problem.
2020-05-24 23:53:41 +00:00
p->streaming = false;
}
wakeup = p->playing;
audio: merge pull/push ring buffer glue code This is preparation to further cleanups (and eventually actual improvements) of the audio output code. AOs are split into two classes: pull and push. Pull AOs let an audio callback of the native audio API read from a ring buffer. Push AOs expose a function that works similar to write(), and for which we start a "feeder" thread. It seems making this split was beneficial, because of the different data flow, and emulating the one or other in the AOs directly would have created code duplication (all the "pull" AOs had their own ring buffer implementation before it was cleaned up). Unfortunately, both types had completely separate implementations (in pull.c and push.c). The idea was that little can be shared anyway. But that's very annoying now, because I want to change the API between AO and player. This commit attempts to merge them. I've moved everything from push.c to pull.c, the trivial entrypoints from ao.c to pull.c, and attempted to reconcile the differences. It's a mess, but at least there's only one ring buffer within the AO code now. Everything should work mostly the same. Pull AOs now always copy the audio data under a lock; before this commit, all ring buffer access was lock-free (except for the decoder wakeup callback, which acquired a mutex). In theory, this is "bad", and people obsessed with lock-free stuff will hate me, but in practice probably won't matter. The planned change will probably remove this copying-under-lock again, but who knows when this will happen. One change for the push AOs now makes it drop audio, where before only a warning was logged. This is only in case of AOs or drivers which exhibit unexpected (and now unsupported) behavior. This is a risky change. Although it's completely trivial conceptually, there are too many special cases. In addition, I barely tested it, and I've messed with it in a half-motivated state over a longer time, barely making any progress, and finishing it under a rush when I already should have been asleep. Most things seem to work, and I made superficial tests with alsa, sdl, and encode mode. This should cover most things, but there are a lot of tricky things that received no coverage. All this text means you should be prepared to roll back to an older commit and report your problem.
2020-05-24 23:53:41 +00:00
p->playing = false;
p->recover_pause = false;
p->hw_paused = false;
p->end_time_ns = 0;
audio: merge pull/push ring buffer glue code This is preparation to further cleanups (and eventually actual improvements) of the audio output code. AOs are split into two classes: pull and push. Pull AOs let an audio callback of the native audio API read from a ring buffer. Push AOs expose a function that works similar to write(), and for which we start a "feeder" thread. It seems making this split was beneficial, because of the different data flow, and emulating the one or other in the AOs directly would have created code duplication (all the "pull" AOs had their own ring buffer implementation before it was cleaned up). Unfortunately, both types had completely separate implementations (in pull.c and push.c). The idea was that little can be shared anyway. But that's very annoying now, because I want to change the API between AO and player. This commit attempts to merge them. I've moved everything from push.c to pull.c, the trivial entrypoints from ao.c to pull.c, and attempted to reconcile the differences. It's a mess, but at least there's only one ring buffer within the AO code now. Everything should work mostly the same. Pull AOs now always copy the audio data under a lock; before this commit, all ring buffer access was lock-free (except for the decoder wakeup callback, which acquired a mutex). In theory, this is "bad", and people obsessed with lock-free stuff will hate me, but in practice probably won't matter. The planned change will probably remove this copying-under-lock again, but who knows when this will happen. One change for the push AOs now makes it drop audio, where before only a warning was logged. This is only in case of AOs or drivers which exhibit unexpected (and now unsupported) behavior. This is a risky change. Although it's completely trivial conceptually, there are too many special cases. In addition, I barely tested it, and I've messed with it in a half-motivated state over a longer time, barely making any progress, and finishing it under a rush when I already should have been asleep. Most things seem to work, and I made superficial tests with alsa, sdl, and encode mode. This should cover most things, but there are a lot of tricky things that received no coverage. All this text means you should be prepared to roll back to an older commit and report your problem.
2020-05-24 23:53:41 +00:00
2023-10-21 02:55:41 +00:00
mp_mutex_unlock(&p->lock);
if (do_reset)
ao->driver->reset(ao);
if (wakeup)
ao_wakeup_playthread(ao);
audio: merge pull/push ring buffer glue code This is preparation to further cleanups (and eventually actual improvements) of the audio output code. AOs are split into two classes: pull and push. Pull AOs let an audio callback of the native audio API read from a ring buffer. Push AOs expose a function that works similar to write(), and for which we start a "feeder" thread. It seems making this split was beneficial, because of the different data flow, and emulating the one or other in the AOs directly would have created code duplication (all the "pull" AOs had their own ring buffer implementation before it was cleaned up). Unfortunately, both types had completely separate implementations (in pull.c and push.c). The idea was that little can be shared anyway. But that's very annoying now, because I want to change the API between AO and player. This commit attempts to merge them. I've moved everything from push.c to pull.c, the trivial entrypoints from ao.c to pull.c, and attempted to reconcile the differences. It's a mess, but at least there's only one ring buffer within the AO code now. Everything should work mostly the same. Pull AOs now always copy the audio data under a lock; before this commit, all ring buffer access was lock-free (except for the decoder wakeup callback, which acquired a mutex). In theory, this is "bad", and people obsessed with lock-free stuff will hate me, but in practice probably won't matter. The planned change will probably remove this copying-under-lock again, but who knows when this will happen. One change for the push AOs now makes it drop audio, where before only a warning was logged. This is only in case of AOs or drivers which exhibit unexpected (and now unsupported) behavior. This is a risky change. Although it's completely trivial conceptually, there are too many special cases. In addition, I barely tested it, and I've messed with it in a half-motivated state over a longer time, barely making any progress, and finishing it under a rush when I already should have been asleep. Most things seem to work, and I made superficial tests with alsa, sdl, and encode mode. This should cover most things, but there are a lot of tricky things that received no coverage. All this text means you should be prepared to roll back to an older commit and report your problem.
2020-05-24 23:53:41 +00:00
}
// Initiate playback. This moves from the stop/underrun state to actually
// playing (orthogonally taking the paused state into account). Plays all
// data in the queue, and goes into underrun state if no more data available.
// No-op if already running.
void ao_start(struct ao *ao)
{
struct buffer_state *p = ao->buffer_state;
bool do_start = false;
2023-10-21 02:55:41 +00:00
mp_mutex_lock(&p->lock);
p->playing = true;
if (!ao->driver->write && !p->paused && !p->streaming) {
p->streaming = true;
do_start = true;
}
2023-10-21 02:55:41 +00:00
mp_mutex_unlock(&p->lock);
// Pull AOs might call ao_read_data() so do this outside the lock.
if (do_start)
ao->driver->start(ao);
ao_wakeup_playthread(ao);
}
void ao_set_paused(struct ao *ao, bool paused, bool eof)
audio: merge pull/push ring buffer glue code This is preparation to further cleanups (and eventually actual improvements) of the audio output code. AOs are split into two classes: pull and push. Pull AOs let an audio callback of the native audio API read from a ring buffer. Push AOs expose a function that works similar to write(), and for which we start a "feeder" thread. It seems making this split was beneficial, because of the different data flow, and emulating the one or other in the AOs directly would have created code duplication (all the "pull" AOs had their own ring buffer implementation before it was cleaned up). Unfortunately, both types had completely separate implementations (in pull.c and push.c). The idea was that little can be shared anyway. But that's very annoying now, because I want to change the API between AO and player. This commit attempts to merge them. I've moved everything from push.c to pull.c, the trivial entrypoints from ao.c to pull.c, and attempted to reconcile the differences. It's a mess, but at least there's only one ring buffer within the AO code now. Everything should work mostly the same. Pull AOs now always copy the audio data under a lock; before this commit, all ring buffer access was lock-free (except for the decoder wakeup callback, which acquired a mutex). In theory, this is "bad", and people obsessed with lock-free stuff will hate me, but in practice probably won't matter. The planned change will probably remove this copying-under-lock again, but who knows when this will happen. One change for the push AOs now makes it drop audio, where before only a warning was logged. This is only in case of AOs or drivers which exhibit unexpected (and now unsupported) behavior. This is a risky change. Although it's completely trivial conceptually, there are too many special cases. In addition, I barely tested it, and I've messed with it in a half-motivated state over a longer time, barely making any progress, and finishing it under a rush when I already should have been asleep. Most things seem to work, and I made superficial tests with alsa, sdl, and encode mode. This should cover most things, but there are a lot of tricky things that received no coverage. All this text means you should be prepared to roll back to an older commit and report your problem.
2020-05-24 23:53:41 +00:00
{
struct buffer_state *p = ao->buffer_state;
bool wakeup = false;
bool do_reset = false, do_start = false;
audio: merge pull/push ring buffer glue code This is preparation to further cleanups (and eventually actual improvements) of the audio output code. AOs are split into two classes: pull and push. Pull AOs let an audio callback of the native audio API read from a ring buffer. Push AOs expose a function that works similar to write(), and for which we start a "feeder" thread. It seems making this split was beneficial, because of the different data flow, and emulating the one or other in the AOs directly would have created code duplication (all the "pull" AOs had their own ring buffer implementation before it was cleaned up). Unfortunately, both types had completely separate implementations (in pull.c and push.c). The idea was that little can be shared anyway. But that's very annoying now, because I want to change the API between AO and player. This commit attempts to merge them. I've moved everything from push.c to pull.c, the trivial entrypoints from ao.c to pull.c, and attempted to reconcile the differences. It's a mess, but at least there's only one ring buffer within the AO code now. Everything should work mostly the same. Pull AOs now always copy the audio data under a lock; before this commit, all ring buffer access was lock-free (except for the decoder wakeup callback, which acquired a mutex). In theory, this is "bad", and people obsessed with lock-free stuff will hate me, but in practice probably won't matter. The planned change will probably remove this copying-under-lock again, but who knows when this will happen. One change for the push AOs now makes it drop audio, where before only a warning was logged. This is only in case of AOs or drivers which exhibit unexpected (and now unsupported) behavior. This is a risky change. Although it's completely trivial conceptually, there are too many special cases. In addition, I barely tested it, and I've messed with it in a half-motivated state over a longer time, barely making any progress, and finishing it under a rush when I already should have been asleep. Most things seem to work, and I made superficial tests with alsa, sdl, and encode mode. This should cover most things, but there are a lot of tricky things that received no coverage. All this text means you should be prepared to roll back to an older commit and report your problem.
2020-05-24 23:53:41 +00:00
// If we are going to pause on eof and ao is still playing,
// be sure to drain the ao first for gapless.
if (eof && paused && ao_is_playing(ao))
ao_drain(ao);
2023-10-21 02:55:41 +00:00
mp_mutex_lock(&p->lock);
audio: merge pull/push ring buffer glue code This is preparation to further cleanups (and eventually actual improvements) of the audio output code. AOs are split into two classes: pull and push. Pull AOs let an audio callback of the native audio API read from a ring buffer. Push AOs expose a function that works similar to write(), and for which we start a "feeder" thread. It seems making this split was beneficial, because of the different data flow, and emulating the one or other in the AOs directly would have created code duplication (all the "pull" AOs had their own ring buffer implementation before it was cleaned up). Unfortunately, both types had completely separate implementations (in pull.c and push.c). The idea was that little can be shared anyway. But that's very annoying now, because I want to change the API between AO and player. This commit attempts to merge them. I've moved everything from push.c to pull.c, the trivial entrypoints from ao.c to pull.c, and attempted to reconcile the differences. It's a mess, but at least there's only one ring buffer within the AO code now. Everything should work mostly the same. Pull AOs now always copy the audio data under a lock; before this commit, all ring buffer access was lock-free (except for the decoder wakeup callback, which acquired a mutex). In theory, this is "bad", and people obsessed with lock-free stuff will hate me, but in practice probably won't matter. The planned change will probably remove this copying-under-lock again, but who knows when this will happen. One change for the push AOs now makes it drop audio, where before only a warning was logged. This is only in case of AOs or drivers which exhibit unexpected (and now unsupported) behavior. This is a risky change. Although it's completely trivial conceptually, there are too many special cases. In addition, I barely tested it, and I've messed with it in a half-motivated state over a longer time, barely making any progress, and finishing it under a rush when I already should have been asleep. Most things seem to work, and I made superficial tests with alsa, sdl, and encode mode. This should cover most things, but there are a lot of tricky things that received no coverage. All this text means you should be prepared to roll back to an older commit and report your problem.
2020-05-24 23:53:41 +00:00
if ((p->playing || !ao->driver->write) && !p->paused && paused) {
audio: merge pull/push ring buffer glue code This is preparation to further cleanups (and eventually actual improvements) of the audio output code. AOs are split into two classes: pull and push. Pull AOs let an audio callback of the native audio API read from a ring buffer. Push AOs expose a function that works similar to write(), and for which we start a "feeder" thread. It seems making this split was beneficial, because of the different data flow, and emulating the one or other in the AOs directly would have created code duplication (all the "pull" AOs had their own ring buffer implementation before it was cleaned up). Unfortunately, both types had completely separate implementations (in pull.c and push.c). The idea was that little can be shared anyway. But that's very annoying now, because I want to change the API between AO and player. This commit attempts to merge them. I've moved everything from push.c to pull.c, the trivial entrypoints from ao.c to pull.c, and attempted to reconcile the differences. It's a mess, but at least there's only one ring buffer within the AO code now. Everything should work mostly the same. Pull AOs now always copy the audio data under a lock; before this commit, all ring buffer access was lock-free (except for the decoder wakeup callback, which acquired a mutex). In theory, this is "bad", and people obsessed with lock-free stuff will hate me, but in practice probably won't matter. The planned change will probably remove this copying-under-lock again, but who knows when this will happen. One change for the push AOs now makes it drop audio, where before only a warning was logged. This is only in case of AOs or drivers which exhibit unexpected (and now unsupported) behavior. This is a risky change. Although it's completely trivial conceptually, there are too many special cases. In addition, I barely tested it, and I've messed with it in a half-motivated state over a longer time, barely making any progress, and finishing it under a rush when I already should have been asleep. Most things seem to work, and I made superficial tests with alsa, sdl, and encode mode. This should cover most things, but there are a lot of tricky things that received no coverage. All this text means you should be prepared to roll back to an older commit and report your problem.
2020-05-24 23:53:41 +00:00
if (p->streaming && !ao->stream_silence) {
if (ao->driver->write) {
if (!p->recover_pause)
get_dev_state(ao, &p->prepause_state);
if (ao->driver->set_pause && ao->driver->set_pause(ao, true)) {
p->hw_paused = true;
} else {
ao->driver->reset(ao);
p->streaming = false;
p->recover_pause = !ao->untimed;
}
audio: merge pull/push ring buffer glue code This is preparation to further cleanups (and eventually actual improvements) of the audio output code. AOs are split into two classes: pull and push. Pull AOs let an audio callback of the native audio API read from a ring buffer. Push AOs expose a function that works similar to write(), and for which we start a "feeder" thread. It seems making this split was beneficial, because of the different data flow, and emulating the one or other in the AOs directly would have created code duplication (all the "pull" AOs had their own ring buffer implementation before it was cleaned up). Unfortunately, both types had completely separate implementations (in pull.c and push.c). The idea was that little can be shared anyway. But that's very annoying now, because I want to change the API between AO and player. This commit attempts to merge them. I've moved everything from push.c to pull.c, the trivial entrypoints from ao.c to pull.c, and attempted to reconcile the differences. It's a mess, but at least there's only one ring buffer within the AO code now. Everything should work mostly the same. Pull AOs now always copy the audio data under a lock; before this commit, all ring buffer access was lock-free (except for the decoder wakeup callback, which acquired a mutex). In theory, this is "bad", and people obsessed with lock-free stuff will hate me, but in practice probably won't matter. The planned change will probably remove this copying-under-lock again, but who knows when this will happen. One change for the push AOs now makes it drop audio, where before only a warning was logged. This is only in case of AOs or drivers which exhibit unexpected (and now unsupported) behavior. This is a risky change. Although it's completely trivial conceptually, there are too many special cases. In addition, I barely tested it, and I've messed with it in a half-motivated state over a longer time, barely making any progress, and finishing it under a rush when I already should have been asleep. Most things seem to work, and I made superficial tests with alsa, sdl, and encode mode. This should cover most things, but there are a lot of tricky things that received no coverage. All this text means you should be prepared to roll back to an older commit and report your problem.
2020-05-24 23:53:41 +00:00
} else if (ao->driver->reset) {
// See ao_reset() why this is done outside of the lock.
do_reset = true;
audio: merge pull/push ring buffer glue code This is preparation to further cleanups (and eventually actual improvements) of the audio output code. AOs are split into two classes: pull and push. Pull AOs let an audio callback of the native audio API read from a ring buffer. Push AOs expose a function that works similar to write(), and for which we start a "feeder" thread. It seems making this split was beneficial, because of the different data flow, and emulating the one or other in the AOs directly would have created code duplication (all the "pull" AOs had their own ring buffer implementation before it was cleaned up). Unfortunately, both types had completely separate implementations (in pull.c and push.c). The idea was that little can be shared anyway. But that's very annoying now, because I want to change the API between AO and player. This commit attempts to merge them. I've moved everything from push.c to pull.c, the trivial entrypoints from ao.c to pull.c, and attempted to reconcile the differences. It's a mess, but at least there's only one ring buffer within the AO code now. Everything should work mostly the same. Pull AOs now always copy the audio data under a lock; before this commit, all ring buffer access was lock-free (except for the decoder wakeup callback, which acquired a mutex). In theory, this is "bad", and people obsessed with lock-free stuff will hate me, but in practice probably won't matter. The planned change will probably remove this copying-under-lock again, but who knows when this will happen. One change for the push AOs now makes it drop audio, where before only a warning was logged. This is only in case of AOs or drivers which exhibit unexpected (and now unsupported) behavior. This is a risky change. Although it's completely trivial conceptually, there are too many special cases. In addition, I barely tested it, and I've messed with it in a half-motivated state over a longer time, barely making any progress, and finishing it under a rush when I already should have been asleep. Most things seem to work, and I made superficial tests with alsa, sdl, and encode mode. This should cover most things, but there are a lot of tricky things that received no coverage. All this text means you should be prepared to roll back to an older commit and report your problem.
2020-05-24 23:53:41 +00:00
p->streaming = false;
}
}
wakeup = true;
} else if (p->playing && p->paused && !paused) {
if (ao->driver->write) {
if (p->hw_paused)
ao->driver->set_pause(ao, false);
p->hw_paused = false;
} else {
if (!p->streaming)
do_start = true;
p->streaming = true;
}
wakeup = true;
audio: merge pull/push ring buffer glue code This is preparation to further cleanups (and eventually actual improvements) of the audio output code. AOs are split into two classes: pull and push. Pull AOs let an audio callback of the native audio API read from a ring buffer. Push AOs expose a function that works similar to write(), and for which we start a "feeder" thread. It seems making this split was beneficial, because of the different data flow, and emulating the one or other in the AOs directly would have created code duplication (all the "pull" AOs had their own ring buffer implementation before it was cleaned up). Unfortunately, both types had completely separate implementations (in pull.c and push.c). The idea was that little can be shared anyway. But that's very annoying now, because I want to change the API between AO and player. This commit attempts to merge them. I've moved everything from push.c to pull.c, the trivial entrypoints from ao.c to pull.c, and attempted to reconcile the differences. It's a mess, but at least there's only one ring buffer within the AO code now. Everything should work mostly the same. Pull AOs now always copy the audio data under a lock; before this commit, all ring buffer access was lock-free (except for the decoder wakeup callback, which acquired a mutex). In theory, this is "bad", and people obsessed with lock-free stuff will hate me, but in practice probably won't matter. The planned change will probably remove this copying-under-lock again, but who knows when this will happen. One change for the push AOs now makes it drop audio, where before only a warning was logged. This is only in case of AOs or drivers which exhibit unexpected (and now unsupported) behavior. This is a risky change. Although it's completely trivial conceptually, there are too many special cases. In addition, I barely tested it, and I've messed with it in a half-motivated state over a longer time, barely making any progress, and finishing it under a rush when I already should have been asleep. Most things seem to work, and I made superficial tests with alsa, sdl, and encode mode. This should cover most things, but there are a lot of tricky things that received no coverage. All this text means you should be prepared to roll back to an older commit and report your problem.
2020-05-24 23:53:41 +00:00
}
p->paused = paused;
audio: merge pull/push ring buffer glue code This is preparation to further cleanups (and eventually actual improvements) of the audio output code. AOs are split into two classes: pull and push. Pull AOs let an audio callback of the native audio API read from a ring buffer. Push AOs expose a function that works similar to write(), and for which we start a "feeder" thread. It seems making this split was beneficial, because of the different data flow, and emulating the one or other in the AOs directly would have created code duplication (all the "pull" AOs had their own ring buffer implementation before it was cleaned up). Unfortunately, both types had completely separate implementations (in pull.c and push.c). The idea was that little can be shared anyway. But that's very annoying now, because I want to change the API between AO and player. This commit attempts to merge them. I've moved everything from push.c to pull.c, the trivial entrypoints from ao.c to pull.c, and attempted to reconcile the differences. It's a mess, but at least there's only one ring buffer within the AO code now. Everything should work mostly the same. Pull AOs now always copy the audio data under a lock; before this commit, all ring buffer access was lock-free (except for the decoder wakeup callback, which acquired a mutex). In theory, this is "bad", and people obsessed with lock-free stuff will hate me, but in practice probably won't matter. The planned change will probably remove this copying-under-lock again, but who knows when this will happen. One change for the push AOs now makes it drop audio, where before only a warning was logged. This is only in case of AOs or drivers which exhibit unexpected (and now unsupported) behavior. This is a risky change. Although it's completely trivial conceptually, there are too many special cases. In addition, I barely tested it, and I've messed with it in a half-motivated state over a longer time, barely making any progress, and finishing it under a rush when I already should have been asleep. Most things seem to work, and I made superficial tests with alsa, sdl, and encode mode. This should cover most things, but there are a lot of tricky things that received no coverage. All this text means you should be prepared to roll back to an older commit and report your problem.
2020-05-24 23:53:41 +00:00
2023-10-21 02:55:41 +00:00
mp_mutex_unlock(&p->lock);
if (do_reset)
ao->driver->reset(ao);
if (do_start)
ao->driver->start(ao);
if (wakeup)
ao_wakeup_playthread(ao);
audio: merge pull/push ring buffer glue code This is preparation to further cleanups (and eventually actual improvements) of the audio output code. AOs are split into two classes: pull and push. Pull AOs let an audio callback of the native audio API read from a ring buffer. Push AOs expose a function that works similar to write(), and for which we start a "feeder" thread. It seems making this split was beneficial, because of the different data flow, and emulating the one or other in the AOs directly would have created code duplication (all the "pull" AOs had their own ring buffer implementation before it was cleaned up). Unfortunately, both types had completely separate implementations (in pull.c and push.c). The idea was that little can be shared anyway. But that's very annoying now, because I want to change the API between AO and player. This commit attempts to merge them. I've moved everything from push.c to pull.c, the trivial entrypoints from ao.c to pull.c, and attempted to reconcile the differences. It's a mess, but at least there's only one ring buffer within the AO code now. Everything should work mostly the same. Pull AOs now always copy the audio data under a lock; before this commit, all ring buffer access was lock-free (except for the decoder wakeup callback, which acquired a mutex). In theory, this is "bad", and people obsessed with lock-free stuff will hate me, but in practice probably won't matter. The planned change will probably remove this copying-under-lock again, but who knows when this will happen. One change for the push AOs now makes it drop audio, where before only a warning was logged. This is only in case of AOs or drivers which exhibit unexpected (and now unsupported) behavior. This is a risky change. Although it's completely trivial conceptually, there are too many special cases. In addition, I barely tested it, and I've messed with it in a half-motivated state over a longer time, barely making any progress, and finishing it under a rush when I already should have been asleep. Most things seem to work, and I made superficial tests with alsa, sdl, and encode mode. This should cover most things, but there are a lot of tricky things that received no coverage. All this text means you should be prepared to roll back to an older commit and report your problem.
2020-05-24 23:53:41 +00:00
}
// Whether audio is playing. This means that there is still data in the buffers,
// and ao_start() was called. This returns true even if playback was logically
// paused. On false, EOF was reached, or an underrun happened, or ao_reset()
// was called.
bool ao_is_playing(struct ao *ao)
audio: merge pull/push ring buffer glue code This is preparation to further cleanups (and eventually actual improvements) of the audio output code. AOs are split into two classes: pull and push. Pull AOs let an audio callback of the native audio API read from a ring buffer. Push AOs expose a function that works similar to write(), and for which we start a "feeder" thread. It seems making this split was beneficial, because of the different data flow, and emulating the one or other in the AOs directly would have created code duplication (all the "pull" AOs had their own ring buffer implementation before it was cleaned up). Unfortunately, both types had completely separate implementations (in pull.c and push.c). The idea was that little can be shared anyway. But that's very annoying now, because I want to change the API between AO and player. This commit attempts to merge them. I've moved everything from push.c to pull.c, the trivial entrypoints from ao.c to pull.c, and attempted to reconcile the differences. It's a mess, but at least there's only one ring buffer within the AO code now. Everything should work mostly the same. Pull AOs now always copy the audio data under a lock; before this commit, all ring buffer access was lock-free (except for the decoder wakeup callback, which acquired a mutex). In theory, this is "bad", and people obsessed with lock-free stuff will hate me, but in practice probably won't matter. The planned change will probably remove this copying-under-lock again, but who knows when this will happen. One change for the push AOs now makes it drop audio, where before only a warning was logged. This is only in case of AOs or drivers which exhibit unexpected (and now unsupported) behavior. This is a risky change. Although it's completely trivial conceptually, there are too many special cases. In addition, I barely tested it, and I've messed with it in a half-motivated state over a longer time, barely making any progress, and finishing it under a rush when I already should have been asleep. Most things seem to work, and I made superficial tests with alsa, sdl, and encode mode. This should cover most things, but there are a lot of tricky things that received no coverage. All this text means you should be prepared to roll back to an older commit and report your problem.
2020-05-24 23:53:41 +00:00
{
struct buffer_state *p = ao->buffer_state;
2023-10-21 02:55:41 +00:00
mp_mutex_lock(&p->lock);
bool playing = p->playing;
2023-10-21 02:55:41 +00:00
mp_mutex_unlock(&p->lock);
audio: merge pull/push ring buffer glue code This is preparation to further cleanups (and eventually actual improvements) of the audio output code. AOs are split into two classes: pull and push. Pull AOs let an audio callback of the native audio API read from a ring buffer. Push AOs expose a function that works similar to write(), and for which we start a "feeder" thread. It seems making this split was beneficial, because of the different data flow, and emulating the one or other in the AOs directly would have created code duplication (all the "pull" AOs had their own ring buffer implementation before it was cleaned up). Unfortunately, both types had completely separate implementations (in pull.c and push.c). The idea was that little can be shared anyway. But that's very annoying now, because I want to change the API between AO and player. This commit attempts to merge them. I've moved everything from push.c to pull.c, the trivial entrypoints from ao.c to pull.c, and attempted to reconcile the differences. It's a mess, but at least there's only one ring buffer within the AO code now. Everything should work mostly the same. Pull AOs now always copy the audio data under a lock; before this commit, all ring buffer access was lock-free (except for the decoder wakeup callback, which acquired a mutex). In theory, this is "bad", and people obsessed with lock-free stuff will hate me, but in practice probably won't matter. The planned change will probably remove this copying-under-lock again, but who knows when this will happen. One change for the push AOs now makes it drop audio, where before only a warning was logged. This is only in case of AOs or drivers which exhibit unexpected (and now unsupported) behavior. This is a risky change. Although it's completely trivial conceptually, there are too many special cases. In addition, I barely tested it, and I've messed with it in a half-motivated state over a longer time, barely making any progress, and finishing it under a rush when I already should have been asleep. Most things seem to work, and I made superficial tests with alsa, sdl, and encode mode. This should cover most things, but there are a lot of tricky things that received no coverage. All this text means you should be prepared to roll back to an older commit and report your problem.
2020-05-24 23:53:41 +00:00
return playing;
audio: merge pull/push ring buffer glue code This is preparation to further cleanups (and eventually actual improvements) of the audio output code. AOs are split into two classes: pull and push. Pull AOs let an audio callback of the native audio API read from a ring buffer. Push AOs expose a function that works similar to write(), and for which we start a "feeder" thread. It seems making this split was beneficial, because of the different data flow, and emulating the one or other in the AOs directly would have created code duplication (all the "pull" AOs had their own ring buffer implementation before it was cleaned up). Unfortunately, both types had completely separate implementations (in pull.c and push.c). The idea was that little can be shared anyway. But that's very annoying now, because I want to change the API between AO and player. This commit attempts to merge them. I've moved everything from push.c to pull.c, the trivial entrypoints from ao.c to pull.c, and attempted to reconcile the differences. It's a mess, but at least there's only one ring buffer within the AO code now. Everything should work mostly the same. Pull AOs now always copy the audio data under a lock; before this commit, all ring buffer access was lock-free (except for the decoder wakeup callback, which acquired a mutex). In theory, this is "bad", and people obsessed with lock-free stuff will hate me, but in practice probably won't matter. The planned change will probably remove this copying-under-lock again, but who knows when this will happen. One change for the push AOs now makes it drop audio, where before only a warning was logged. This is only in case of AOs or drivers which exhibit unexpected (and now unsupported) behavior. This is a risky change. Although it's completely trivial conceptually, there are too many special cases. In addition, I barely tested it, and I've messed with it in a half-motivated state over a longer time, barely making any progress, and finishing it under a rush when I already should have been asleep. Most things seem to work, and I made superficial tests with alsa, sdl, and encode mode. This should cover most things, but there are a lot of tricky things that received no coverage. All this text means you should be prepared to roll back to an older commit and report your problem.
2020-05-24 23:53:41 +00:00
}
// Block until the current audio buffer has played completely.
void ao_drain(struct ao *ao)
{
struct buffer_state *p = ao->buffer_state;
2023-10-21 02:55:41 +00:00
mp_mutex_lock(&p->lock);
while (!p->paused && p->playing) {
2023-10-21 02:55:41 +00:00
mp_mutex_unlock(&p->lock);
double delay = ao_get_delay(ao);
2023-10-21 02:55:41 +00:00
mp_mutex_lock(&p->lock);
// Limit to buffer + arbitrary ~250ms max. waiting for robustness.
delay += mp_async_queue_get_samples(p->queue) / (double)ao->samplerate;
// Wait for EOF signal from AO.
2023-10-21 02:55:41 +00:00
if (mp_cond_timedwait(&p->wakeup, &p->lock,
MP_TIME_S_TO_NS(MPMAX(delay, 0) + 0.25)))
{
MP_VERBOSE(ao, "drain timeout\n");
break;
}
audio: merge pull/push ring buffer glue code This is preparation to further cleanups (and eventually actual improvements) of the audio output code. AOs are split into two classes: pull and push. Pull AOs let an audio callback of the native audio API read from a ring buffer. Push AOs expose a function that works similar to write(), and for which we start a "feeder" thread. It seems making this split was beneficial, because of the different data flow, and emulating the one or other in the AOs directly would have created code duplication (all the "pull" AOs had their own ring buffer implementation before it was cleaned up). Unfortunately, both types had completely separate implementations (in pull.c and push.c). The idea was that little can be shared anyway. But that's very annoying now, because I want to change the API between AO and player. This commit attempts to merge them. I've moved everything from push.c to pull.c, the trivial entrypoints from ao.c to pull.c, and attempted to reconcile the differences. It's a mess, but at least there's only one ring buffer within the AO code now. Everything should work mostly the same. Pull AOs now always copy the audio data under a lock; before this commit, all ring buffer access was lock-free (except for the decoder wakeup callback, which acquired a mutex). In theory, this is "bad", and people obsessed with lock-free stuff will hate me, but in practice probably won't matter. The planned change will probably remove this copying-under-lock again, but who knows when this will happen. One change for the push AOs now makes it drop audio, where before only a warning was logged. This is only in case of AOs or drivers which exhibit unexpected (and now unsupported) behavior. This is a risky change. Although it's completely trivial conceptually, there are too many special cases. In addition, I barely tested it, and I've messed with it in a half-motivated state over a longer time, barely making any progress, and finishing it under a rush when I already should have been asleep. Most things seem to work, and I made superficial tests with alsa, sdl, and encode mode. This should cover most things, but there are a lot of tricky things that received no coverage. All this text means you should be prepared to roll back to an older commit and report your problem.
2020-05-24 23:53:41 +00:00
if (!p->playing && mp_async_queue_get_samples(p->queue)) {
MP_WARN(ao, "underrun during draining\n");
2023-10-21 02:55:41 +00:00
mp_mutex_unlock(&p->lock);
ao_start(ao);
2023-10-21 02:55:41 +00:00
mp_mutex_lock(&p->lock);
}
}
2023-10-21 02:55:41 +00:00
mp_mutex_unlock(&p->lock);
audio: merge pull/push ring buffer glue code This is preparation to further cleanups (and eventually actual improvements) of the audio output code. AOs are split into two classes: pull and push. Pull AOs let an audio callback of the native audio API read from a ring buffer. Push AOs expose a function that works similar to write(), and for which we start a "feeder" thread. It seems making this split was beneficial, because of the different data flow, and emulating the one or other in the AOs directly would have created code duplication (all the "pull" AOs had their own ring buffer implementation before it was cleaned up). Unfortunately, both types had completely separate implementations (in pull.c and push.c). The idea was that little can be shared anyway. But that's very annoying now, because I want to change the API between AO and player. This commit attempts to merge them. I've moved everything from push.c to pull.c, the trivial entrypoints from ao.c to pull.c, and attempted to reconcile the differences. It's a mess, but at least there's only one ring buffer within the AO code now. Everything should work mostly the same. Pull AOs now always copy the audio data under a lock; before this commit, all ring buffer access was lock-free (except for the decoder wakeup callback, which acquired a mutex). In theory, this is "bad", and people obsessed with lock-free stuff will hate me, but in practice probably won't matter. The planned change will probably remove this copying-under-lock again, but who knows when this will happen. One change for the push AOs now makes it drop audio, where before only a warning was logged. This is only in case of AOs or drivers which exhibit unexpected (and now unsupported) behavior. This is a risky change. Although it's completely trivial conceptually, there are too many special cases. In addition, I barely tested it, and I've messed with it in a half-motivated state over a longer time, barely making any progress, and finishing it under a rush when I already should have been asleep. Most things seem to work, and I made superficial tests with alsa, sdl, and encode mode. This should cover most things, but there are a lot of tricky things that received no coverage. All this text means you should be prepared to roll back to an older commit and report your problem.
2020-05-24 23:53:41 +00:00
ao_reset(ao);
}
static void wakeup_filters(void *ctx)
{
struct ao *ao = ctx;
ao_wakeup_playthread(ao);
}
audio: merge pull/push ring buffer glue code This is preparation to further cleanups (and eventually actual improvements) of the audio output code. AOs are split into two classes: pull and push. Pull AOs let an audio callback of the native audio API read from a ring buffer. Push AOs expose a function that works similar to write(), and for which we start a "feeder" thread. It seems making this split was beneficial, because of the different data flow, and emulating the one or other in the AOs directly would have created code duplication (all the "pull" AOs had their own ring buffer implementation before it was cleaned up). Unfortunately, both types had completely separate implementations (in pull.c and push.c). The idea was that little can be shared anyway. But that's very annoying now, because I want to change the API between AO and player. This commit attempts to merge them. I've moved everything from push.c to pull.c, the trivial entrypoints from ao.c to pull.c, and attempted to reconcile the differences. It's a mess, but at least there's only one ring buffer within the AO code now. Everything should work mostly the same. Pull AOs now always copy the audio data under a lock; before this commit, all ring buffer access was lock-free (except for the decoder wakeup callback, which acquired a mutex). In theory, this is "bad", and people obsessed with lock-free stuff will hate me, but in practice probably won't matter. The planned change will probably remove this copying-under-lock again, but who knows when this will happen. One change for the push AOs now makes it drop audio, where before only a warning was logged. This is only in case of AOs or drivers which exhibit unexpected (and now unsupported) behavior. This is a risky change. Although it's completely trivial conceptually, there are too many special cases. In addition, I barely tested it, and I've messed with it in a half-motivated state over a longer time, barely making any progress, and finishing it under a rush when I already should have been asleep. Most things seem to work, and I made superficial tests with alsa, sdl, and encode mode. This should cover most things, but there are a lot of tricky things that received no coverage. All this text means you should be prepared to roll back to an older commit and report your problem.
2020-05-24 23:53:41 +00:00
void ao_uninit(struct ao *ao)
{
struct buffer_state *p = ao->buffer_state;
if (p && p->thread_valid) {
2023-10-21 02:55:41 +00:00
mp_mutex_lock(&p->pt_lock);
audio: merge pull/push ring buffer glue code This is preparation to further cleanups (and eventually actual improvements) of the audio output code. AOs are split into two classes: pull and push. Pull AOs let an audio callback of the native audio API read from a ring buffer. Push AOs expose a function that works similar to write(), and for which we start a "feeder" thread. It seems making this split was beneficial, because of the different data flow, and emulating the one or other in the AOs directly would have created code duplication (all the "pull" AOs had their own ring buffer implementation before it was cleaned up). Unfortunately, both types had completely separate implementations (in pull.c and push.c). The idea was that little can be shared anyway. But that's very annoying now, because I want to change the API between AO and player. This commit attempts to merge them. I've moved everything from push.c to pull.c, the trivial entrypoints from ao.c to pull.c, and attempted to reconcile the differences. It's a mess, but at least there's only one ring buffer within the AO code now. Everything should work mostly the same. Pull AOs now always copy the audio data under a lock; before this commit, all ring buffer access was lock-free (except for the decoder wakeup callback, which acquired a mutex). In theory, this is "bad", and people obsessed with lock-free stuff will hate me, but in practice probably won't matter. The planned change will probably remove this copying-under-lock again, but who knows when this will happen. One change for the push AOs now makes it drop audio, where before only a warning was logged. This is only in case of AOs or drivers which exhibit unexpected (and now unsupported) behavior. This is a risky change. Although it's completely trivial conceptually, there are too many special cases. In addition, I barely tested it, and I've messed with it in a half-motivated state over a longer time, barely making any progress, and finishing it under a rush when I already should have been asleep. Most things seem to work, and I made superficial tests with alsa, sdl, and encode mode. This should cover most things, but there are a lot of tricky things that received no coverage. All this text means you should be prepared to roll back to an older commit and report your problem.
2020-05-24 23:53:41 +00:00
p->terminate = true;
2023-10-21 02:55:41 +00:00
mp_cond_broadcast(&p->pt_wakeup);
mp_mutex_unlock(&p->pt_lock);
audio: merge pull/push ring buffer glue code This is preparation to further cleanups (and eventually actual improvements) of the audio output code. AOs are split into two classes: pull and push. Pull AOs let an audio callback of the native audio API read from a ring buffer. Push AOs expose a function that works similar to write(), and for which we start a "feeder" thread. It seems making this split was beneficial, because of the different data flow, and emulating the one or other in the AOs directly would have created code duplication (all the "pull" AOs had their own ring buffer implementation before it was cleaned up). Unfortunately, both types had completely separate implementations (in pull.c and push.c). The idea was that little can be shared anyway. But that's very annoying now, because I want to change the API between AO and player. This commit attempts to merge them. I've moved everything from push.c to pull.c, the trivial entrypoints from ao.c to pull.c, and attempted to reconcile the differences. It's a mess, but at least there's only one ring buffer within the AO code now. Everything should work mostly the same. Pull AOs now always copy the audio data under a lock; before this commit, all ring buffer access was lock-free (except for the decoder wakeup callback, which acquired a mutex). In theory, this is "bad", and people obsessed with lock-free stuff will hate me, but in practice probably won't matter. The planned change will probably remove this copying-under-lock again, but who knows when this will happen. One change for the push AOs now makes it drop audio, where before only a warning was logged. This is only in case of AOs or drivers which exhibit unexpected (and now unsupported) behavior. This is a risky change. Although it's completely trivial conceptually, there are too many special cases. In addition, I barely tested it, and I've messed with it in a half-motivated state over a longer time, barely making any progress, and finishing it under a rush when I already should have been asleep. Most things seem to work, and I made superficial tests with alsa, sdl, and encode mode. This should cover most things, but there are a lot of tricky things that received no coverage. All this text means you should be prepared to roll back to an older commit and report your problem.
2020-05-24 23:53:41 +00:00
2023-10-21 02:55:41 +00:00
mp_thread_join(p->thread);
audio: merge pull/push ring buffer glue code This is preparation to further cleanups (and eventually actual improvements) of the audio output code. AOs are split into two classes: pull and push. Pull AOs let an audio callback of the native audio API read from a ring buffer. Push AOs expose a function that works similar to write(), and for which we start a "feeder" thread. It seems making this split was beneficial, because of the different data flow, and emulating the one or other in the AOs directly would have created code duplication (all the "pull" AOs had their own ring buffer implementation before it was cleaned up). Unfortunately, both types had completely separate implementations (in pull.c and push.c). The idea was that little can be shared anyway. But that's very annoying now, because I want to change the API between AO and player. This commit attempts to merge them. I've moved everything from push.c to pull.c, the trivial entrypoints from ao.c to pull.c, and attempted to reconcile the differences. It's a mess, but at least there's only one ring buffer within the AO code now. Everything should work mostly the same. Pull AOs now always copy the audio data under a lock; before this commit, all ring buffer access was lock-free (except for the decoder wakeup callback, which acquired a mutex). In theory, this is "bad", and people obsessed with lock-free stuff will hate me, but in practice probably won't matter. The planned change will probably remove this copying-under-lock again, but who knows when this will happen. One change for the push AOs now makes it drop audio, where before only a warning was logged. This is only in case of AOs or drivers which exhibit unexpected (and now unsupported) behavior. This is a risky change. Although it's completely trivial conceptually, there are too many special cases. In addition, I barely tested it, and I've messed with it in a half-motivated state over a longer time, barely making any progress, and finishing it under a rush when I already should have been asleep. Most things seem to work, and I made superficial tests with alsa, sdl, and encode mode. This should cover most things, but there are a lot of tricky things that received no coverage. All this text means you should be prepared to roll back to an older commit and report your problem.
2020-05-24 23:53:41 +00:00
p->thread_valid = false;
}
if (ao->driver_initialized)
ao->driver->uninit(ao);
if (p) {
talloc_free(p->filter_root);
talloc_free(p->queue);
talloc_free(p->pending);
talloc_free(p->convert_buffer);
talloc_free(p->temp_buf);
audio: merge pull/push ring buffer glue code This is preparation to further cleanups (and eventually actual improvements) of the audio output code. AOs are split into two classes: pull and push. Pull AOs let an audio callback of the native audio API read from a ring buffer. Push AOs expose a function that works similar to write(), and for which we start a "feeder" thread. It seems making this split was beneficial, because of the different data flow, and emulating the one or other in the AOs directly would have created code duplication (all the "pull" AOs had their own ring buffer implementation before it was cleaned up). Unfortunately, both types had completely separate implementations (in pull.c and push.c). The idea was that little can be shared anyway. But that's very annoying now, because I want to change the API between AO and player. This commit attempts to merge them. I've moved everything from push.c to pull.c, the trivial entrypoints from ao.c to pull.c, and attempted to reconcile the differences. It's a mess, but at least there's only one ring buffer within the AO code now. Everything should work mostly the same. Pull AOs now always copy the audio data under a lock; before this commit, all ring buffer access was lock-free (except for the decoder wakeup callback, which acquired a mutex). In theory, this is "bad", and people obsessed with lock-free stuff will hate me, but in practice probably won't matter. The planned change will probably remove this copying-under-lock again, but who knows when this will happen. One change for the push AOs now makes it drop audio, where before only a warning was logged. This is only in case of AOs or drivers which exhibit unexpected (and now unsupported) behavior. This is a risky change. Although it's completely trivial conceptually, there are too many special cases. In addition, I barely tested it, and I've messed with it in a half-motivated state over a longer time, barely making any progress, and finishing it under a rush when I already should have been asleep. Most things seem to work, and I made superficial tests with alsa, sdl, and encode mode. This should cover most things, but there are a lot of tricky things that received no coverage. All this text means you should be prepared to roll back to an older commit and report your problem.
2020-05-24 23:53:41 +00:00
2023-10-21 02:55:41 +00:00
mp_cond_destroy(&p->wakeup);
mp_mutex_destroy(&p->lock);
audio: merge pull/push ring buffer glue code This is preparation to further cleanups (and eventually actual improvements) of the audio output code. AOs are split into two classes: pull and push. Pull AOs let an audio callback of the native audio API read from a ring buffer. Push AOs expose a function that works similar to write(), and for which we start a "feeder" thread. It seems making this split was beneficial, because of the different data flow, and emulating the one or other in the AOs directly would have created code duplication (all the "pull" AOs had their own ring buffer implementation before it was cleaned up). Unfortunately, both types had completely separate implementations (in pull.c and push.c). The idea was that little can be shared anyway. But that's very annoying now, because I want to change the API between AO and player. This commit attempts to merge them. I've moved everything from push.c to pull.c, the trivial entrypoints from ao.c to pull.c, and attempted to reconcile the differences. It's a mess, but at least there's only one ring buffer within the AO code now. Everything should work mostly the same. Pull AOs now always copy the audio data under a lock; before this commit, all ring buffer access was lock-free (except for the decoder wakeup callback, which acquired a mutex). In theory, this is "bad", and people obsessed with lock-free stuff will hate me, but in practice probably won't matter. The planned change will probably remove this copying-under-lock again, but who knows when this will happen. One change for the push AOs now makes it drop audio, where before only a warning was logged. This is only in case of AOs or drivers which exhibit unexpected (and now unsupported) behavior. This is a risky change. Although it's completely trivial conceptually, there are too many special cases. In addition, I barely tested it, and I've messed with it in a half-motivated state over a longer time, barely making any progress, and finishing it under a rush when I already should have been asleep. Most things seem to work, and I made superficial tests with alsa, sdl, and encode mode. This should cover most things, but there are a lot of tricky things that received no coverage. All this text means you should be prepared to roll back to an older commit and report your problem.
2020-05-24 23:53:41 +00:00
2023-10-21 02:55:41 +00:00
mp_cond_destroy(&p->pt_wakeup);
mp_mutex_destroy(&p->pt_lock);
}
audio: merge pull/push ring buffer glue code This is preparation to further cleanups (and eventually actual improvements) of the audio output code. AOs are split into two classes: pull and push. Pull AOs let an audio callback of the native audio API read from a ring buffer. Push AOs expose a function that works similar to write(), and for which we start a "feeder" thread. It seems making this split was beneficial, because of the different data flow, and emulating the one or other in the AOs directly would have created code duplication (all the "pull" AOs had their own ring buffer implementation before it was cleaned up). Unfortunately, both types had completely separate implementations (in pull.c and push.c). The idea was that little can be shared anyway. But that's very annoying now, because I want to change the API between AO and player. This commit attempts to merge them. I've moved everything from push.c to pull.c, the trivial entrypoints from ao.c to pull.c, and attempted to reconcile the differences. It's a mess, but at least there's only one ring buffer within the AO code now. Everything should work mostly the same. Pull AOs now always copy the audio data under a lock; before this commit, all ring buffer access was lock-free (except for the decoder wakeup callback, which acquired a mutex). In theory, this is "bad", and people obsessed with lock-free stuff will hate me, but in practice probably won't matter. The planned change will probably remove this copying-under-lock again, but who knows when this will happen. One change for the push AOs now makes it drop audio, where before only a warning was logged. This is only in case of AOs or drivers which exhibit unexpected (and now unsupported) behavior. This is a risky change. Although it's completely trivial conceptually, there are too many special cases. In addition, I barely tested it, and I've messed with it in a half-motivated state over a longer time, barely making any progress, and finishing it under a rush when I already should have been asleep. Most things seem to work, and I made superficial tests with alsa, sdl, and encode mode. This should cover most things, but there are a lot of tricky things that received no coverage. All this text means you should be prepared to roll back to an older commit and report your problem.
2020-05-24 23:53:41 +00:00
talloc_free(ao);
}
void init_buffer_pre(struct ao *ao)
{
ao->buffer_state = talloc_zero(ao, struct buffer_state);
}
bool init_buffer_post(struct ao *ao)
{
struct buffer_state *p = ao->buffer_state;
assert(ao->driver->start);
if (ao->driver->write) {
assert(ao->driver->reset);
assert(ao->driver->get_state);
}
audio: merge pull/push ring buffer glue code This is preparation to further cleanups (and eventually actual improvements) of the audio output code. AOs are split into two classes: pull and push. Pull AOs let an audio callback of the native audio API read from a ring buffer. Push AOs expose a function that works similar to write(), and for which we start a "feeder" thread. It seems making this split was beneficial, because of the different data flow, and emulating the one or other in the AOs directly would have created code duplication (all the "pull" AOs had their own ring buffer implementation before it was cleaned up). Unfortunately, both types had completely separate implementations (in pull.c and push.c). The idea was that little can be shared anyway. But that's very annoying now, because I want to change the API between AO and player. This commit attempts to merge them. I've moved everything from push.c to pull.c, the trivial entrypoints from ao.c to pull.c, and attempted to reconcile the differences. It's a mess, but at least there's only one ring buffer within the AO code now. Everything should work mostly the same. Pull AOs now always copy the audio data under a lock; before this commit, all ring buffer access was lock-free (except for the decoder wakeup callback, which acquired a mutex). In theory, this is "bad", and people obsessed with lock-free stuff will hate me, but in practice probably won't matter. The planned change will probably remove this copying-under-lock again, but who knows when this will happen. One change for the push AOs now makes it drop audio, where before only a warning was logged. This is only in case of AOs or drivers which exhibit unexpected (and now unsupported) behavior. This is a risky change. Although it's completely trivial conceptually, there are too many special cases. In addition, I barely tested it, and I've messed with it in a half-motivated state over a longer time, barely making any progress, and finishing it under a rush when I already should have been asleep. Most things seem to work, and I made superficial tests with alsa, sdl, and encode mode. This should cover most things, but there are a lot of tricky things that received no coverage. All this text means you should be prepared to roll back to an older commit and report your problem.
2020-05-24 23:53:41 +00:00
2023-10-21 02:55:41 +00:00
mp_mutex_init(&p->lock);
mp_cond_init(&p->wakeup);
audio: merge pull/push ring buffer glue code This is preparation to further cleanups (and eventually actual improvements) of the audio output code. AOs are split into two classes: pull and push. Pull AOs let an audio callback of the native audio API read from a ring buffer. Push AOs expose a function that works similar to write(), and for which we start a "feeder" thread. It seems making this split was beneficial, because of the different data flow, and emulating the one or other in the AOs directly would have created code duplication (all the "pull" AOs had their own ring buffer implementation before it was cleaned up). Unfortunately, both types had completely separate implementations (in pull.c and push.c). The idea was that little can be shared anyway. But that's very annoying now, because I want to change the API between AO and player. This commit attempts to merge them. I've moved everything from push.c to pull.c, the trivial entrypoints from ao.c to pull.c, and attempted to reconcile the differences. It's a mess, but at least there's only one ring buffer within the AO code now. Everything should work mostly the same. Pull AOs now always copy the audio data under a lock; before this commit, all ring buffer access was lock-free (except for the decoder wakeup callback, which acquired a mutex). In theory, this is "bad", and people obsessed with lock-free stuff will hate me, but in practice probably won't matter. The planned change will probably remove this copying-under-lock again, but who knows when this will happen. One change for the push AOs now makes it drop audio, where before only a warning was logged. This is only in case of AOs or drivers which exhibit unexpected (and now unsupported) behavior. This is a risky change. Although it's completely trivial conceptually, there are too many special cases. In addition, I barely tested it, and I've messed with it in a half-motivated state over a longer time, barely making any progress, and finishing it under a rush when I already should have been asleep. Most things seem to work, and I made superficial tests with alsa, sdl, and encode mode. This should cover most things, but there are a lot of tricky things that received no coverage. All this text means you should be prepared to roll back to an older commit and report your problem.
2020-05-24 23:53:41 +00:00
2023-10-21 02:55:41 +00:00
mp_mutex_init(&p->pt_lock);
mp_cond_init(&p->pt_wakeup);
audio: merge pull/push ring buffer glue code This is preparation to further cleanups (and eventually actual improvements) of the audio output code. AOs are split into two classes: pull and push. Pull AOs let an audio callback of the native audio API read from a ring buffer. Push AOs expose a function that works similar to write(), and for which we start a "feeder" thread. It seems making this split was beneficial, because of the different data flow, and emulating the one or other in the AOs directly would have created code duplication (all the "pull" AOs had their own ring buffer implementation before it was cleaned up). Unfortunately, both types had completely separate implementations (in pull.c and push.c). The idea was that little can be shared anyway. But that's very annoying now, because I want to change the API between AO and player. This commit attempts to merge them. I've moved everything from push.c to pull.c, the trivial entrypoints from ao.c to pull.c, and attempted to reconcile the differences. It's a mess, but at least there's only one ring buffer within the AO code now. Everything should work mostly the same. Pull AOs now always copy the audio data under a lock; before this commit, all ring buffer access was lock-free (except for the decoder wakeup callback, which acquired a mutex). In theory, this is "bad", and people obsessed with lock-free stuff will hate me, but in practice probably won't matter. The planned change will probably remove this copying-under-lock again, but who knows when this will happen. One change for the push AOs now makes it drop audio, where before only a warning was logged. This is only in case of AOs or drivers which exhibit unexpected (and now unsupported) behavior. This is a risky change. Although it's completely trivial conceptually, there are too many special cases. In addition, I barely tested it, and I've messed with it in a half-motivated state over a longer time, barely making any progress, and finishing it under a rush when I already should have been asleep. Most things seem to work, and I made superficial tests with alsa, sdl, and encode mode. This should cover most things, but there are a lot of tricky things that received no coverage. All this text means you should be prepared to roll back to an older commit and report your problem.
2020-05-24 23:53:41 +00:00
p->queue = mp_async_queue_create();
p->filter_root = mp_filter_create_root(ao->global);
p->input = mp_async_queue_create_filter(p->filter_root, MP_PIN_OUT, p->queue);
mp_async_queue_resume_reading(p->queue);
struct mp_async_queue_config cfg = {
.sample_unit = AQUEUE_UNIT_SAMPLES,
.max_samples = ao->buffer,
.max_bytes = INT64_MAX,
};
mp_async_queue_set_config(p->queue, cfg);
if (ao->driver->write) {
mp_filter_graph_set_wakeup_cb(p->filter_root, wakeup_filters, ao);
audio: merge pull/push ring buffer glue code This is preparation to further cleanups (and eventually actual improvements) of the audio output code. AOs are split into two classes: pull and push. Pull AOs let an audio callback of the native audio API read from a ring buffer. Push AOs expose a function that works similar to write(), and for which we start a "feeder" thread. It seems making this split was beneficial, because of the different data flow, and emulating the one or other in the AOs directly would have created code duplication (all the "pull" AOs had their own ring buffer implementation before it was cleaned up). Unfortunately, both types had completely separate implementations (in pull.c and push.c). The idea was that little can be shared anyway. But that's very annoying now, because I want to change the API between AO and player. This commit attempts to merge them. I've moved everything from push.c to pull.c, the trivial entrypoints from ao.c to pull.c, and attempted to reconcile the differences. It's a mess, but at least there's only one ring buffer within the AO code now. Everything should work mostly the same. Pull AOs now always copy the audio data under a lock; before this commit, all ring buffer access was lock-free (except for the decoder wakeup callback, which acquired a mutex). In theory, this is "bad", and people obsessed with lock-free stuff will hate me, but in practice probably won't matter. The planned change will probably remove this copying-under-lock again, but who knows when this will happen. One change for the push AOs now makes it drop audio, where before only a warning was logged. This is only in case of AOs or drivers which exhibit unexpected (and now unsupported) behavior. This is a risky change. Although it's completely trivial conceptually, there are too many special cases. In addition, I barely tested it, and I've messed with it in a half-motivated state over a longer time, barely making any progress, and finishing it under a rush when I already should have been asleep. Most things seem to work, and I made superficial tests with alsa, sdl, and encode mode. This should cover most things, but there are a lot of tricky things that received no coverage. All this text means you should be prepared to roll back to an older commit and report your problem.
2020-05-24 23:53:41 +00:00
p->thread_valid = true;
2023-10-21 02:55:41 +00:00
if (mp_thread_create(&p->thread, playthread, ao)) {
audio: merge pull/push ring buffer glue code This is preparation to further cleanups (and eventually actual improvements) of the audio output code. AOs are split into two classes: pull and push. Pull AOs let an audio callback of the native audio API read from a ring buffer. Push AOs expose a function that works similar to write(), and for which we start a "feeder" thread. It seems making this split was beneficial, because of the different data flow, and emulating the one or other in the AOs directly would have created code duplication (all the "pull" AOs had their own ring buffer implementation before it was cleaned up). Unfortunately, both types had completely separate implementations (in pull.c and push.c). The idea was that little can be shared anyway. But that's very annoying now, because I want to change the API between AO and player. This commit attempts to merge them. I've moved everything from push.c to pull.c, the trivial entrypoints from ao.c to pull.c, and attempted to reconcile the differences. It's a mess, but at least there's only one ring buffer within the AO code now. Everything should work mostly the same. Pull AOs now always copy the audio data under a lock; before this commit, all ring buffer access was lock-free (except for the decoder wakeup callback, which acquired a mutex). In theory, this is "bad", and people obsessed with lock-free stuff will hate me, but in practice probably won't matter. The planned change will probably remove this copying-under-lock again, but who knows when this will happen. One change for the push AOs now makes it drop audio, where before only a warning was logged. This is only in case of AOs or drivers which exhibit unexpected (and now unsupported) behavior. This is a risky change. Although it's completely trivial conceptually, there are too many special cases. In addition, I barely tested it, and I've messed with it in a half-motivated state over a longer time, barely making any progress, and finishing it under a rush when I already should have been asleep. Most things seem to work, and I made superficial tests with alsa, sdl, and encode mode. This should cover most things, but there are a lot of tricky things that received no coverage. All this text means you should be prepared to roll back to an older commit and report your problem.
2020-05-24 23:53:41 +00:00
p->thread_valid = false;
return false;
}
} else {
if (ao->stream_silence) {
ao->driver->start(ao);
audio: merge pull/push ring buffer glue code This is preparation to further cleanups (and eventually actual improvements) of the audio output code. AOs are split into two classes: pull and push. Pull AOs let an audio callback of the native audio API read from a ring buffer. Push AOs expose a function that works similar to write(), and for which we start a "feeder" thread. It seems making this split was beneficial, because of the different data flow, and emulating the one or other in the AOs directly would have created code duplication (all the "pull" AOs had their own ring buffer implementation before it was cleaned up). Unfortunately, both types had completely separate implementations (in pull.c and push.c). The idea was that little can be shared anyway. But that's very annoying now, because I want to change the API between AO and player. This commit attempts to merge them. I've moved everything from push.c to pull.c, the trivial entrypoints from ao.c to pull.c, and attempted to reconcile the differences. It's a mess, but at least there's only one ring buffer within the AO code now. Everything should work mostly the same. Pull AOs now always copy the audio data under a lock; before this commit, all ring buffer access was lock-free (except for the decoder wakeup callback, which acquired a mutex). In theory, this is "bad", and people obsessed with lock-free stuff will hate me, but in practice probably won't matter. The planned change will probably remove this copying-under-lock again, but who knows when this will happen. One change for the push AOs now makes it drop audio, where before only a warning was logged. This is only in case of AOs or drivers which exhibit unexpected (and now unsupported) behavior. This is a risky change. Although it's completely trivial conceptually, there are too many special cases. In addition, I barely tested it, and I've messed with it in a half-motivated state over a longer time, barely making any progress, and finishing it under a rush when I already should have been asleep. Most things seem to work, and I made superficial tests with alsa, sdl, and encode mode. This should cover most things, but there are a lot of tricky things that received no coverage. All this text means you should be prepared to roll back to an older commit and report your problem.
2020-05-24 23:53:41 +00:00
p->streaming = true;
}
}
if (ao->stream_silence) {
MP_WARN(ao, "The --audio-stream-silence option is set. This will break "
"certain player behavior.\n");
}
audio: merge pull/push ring buffer glue code This is preparation to further cleanups (and eventually actual improvements) of the audio output code. AOs are split into two classes: pull and push. Pull AOs let an audio callback of the native audio API read from a ring buffer. Push AOs expose a function that works similar to write(), and for which we start a "feeder" thread. It seems making this split was beneficial, because of the different data flow, and emulating the one or other in the AOs directly would have created code duplication (all the "pull" AOs had their own ring buffer implementation before it was cleaned up). Unfortunately, both types had completely separate implementations (in pull.c and push.c). The idea was that little can be shared anyway. But that's very annoying now, because I want to change the API between AO and player. This commit attempts to merge them. I've moved everything from push.c to pull.c, the trivial entrypoints from ao.c to pull.c, and attempted to reconcile the differences. It's a mess, but at least there's only one ring buffer within the AO code now. Everything should work mostly the same. Pull AOs now always copy the audio data under a lock; before this commit, all ring buffer access was lock-free (except for the decoder wakeup callback, which acquired a mutex). In theory, this is "bad", and people obsessed with lock-free stuff will hate me, but in practice probably won't matter. The planned change will probably remove this copying-under-lock again, but who knows when this will happen. One change for the push AOs now makes it drop audio, where before only a warning was logged. This is only in case of AOs or drivers which exhibit unexpected (and now unsupported) behavior. This is a risky change. Although it's completely trivial conceptually, there are too many special cases. In addition, I barely tested it, and I've messed with it in a half-motivated state over a longer time, barely making any progress, and finishing it under a rush when I already should have been asleep. Most things seem to work, and I made superficial tests with alsa, sdl, and encode mode. This should cover most things, but there are a lot of tricky things that received no coverage. All this text means you should be prepared to roll back to an older commit and report your problem.
2020-05-24 23:53:41 +00:00
return true;
}
static bool realloc_buf(struct ao *ao, int samples)
{
struct buffer_state *p = ao->buffer_state;
samples = MPMAX(1, samples);
if (!p->temp_buf || samples > mp_aframe_get_size(p->temp_buf)) {
TA_FREEP(&p->temp_buf);
p->temp_buf = mp_aframe_create();
if (!mp_aframe_set_format(p->temp_buf, ao->format) ||
!mp_aframe_set_chmap(p->temp_buf, &ao->channels) ||
!mp_aframe_set_rate(p->temp_buf, ao->samplerate) ||
!mp_aframe_alloc_data(p->temp_buf, samples))
{
TA_FREEP(&p->temp_buf);
return false;
}
}
return true;
}
// called locked
static bool ao_play_data(struct ao *ao)
audio: merge pull/push ring buffer glue code This is preparation to further cleanups (and eventually actual improvements) of the audio output code. AOs are split into two classes: pull and push. Pull AOs let an audio callback of the native audio API read from a ring buffer. Push AOs expose a function that works similar to write(), and for which we start a "feeder" thread. It seems making this split was beneficial, because of the different data flow, and emulating the one or other in the AOs directly would have created code duplication (all the "pull" AOs had their own ring buffer implementation before it was cleaned up). Unfortunately, both types had completely separate implementations (in pull.c and push.c). The idea was that little can be shared anyway. But that's very annoying now, because I want to change the API between AO and player. This commit attempts to merge them. I've moved everything from push.c to pull.c, the trivial entrypoints from ao.c to pull.c, and attempted to reconcile the differences. It's a mess, but at least there's only one ring buffer within the AO code now. Everything should work mostly the same. Pull AOs now always copy the audio data under a lock; before this commit, all ring buffer access was lock-free (except for the decoder wakeup callback, which acquired a mutex). In theory, this is "bad", and people obsessed with lock-free stuff will hate me, but in practice probably won't matter. The planned change will probably remove this copying-under-lock again, but who knows when this will happen. One change for the push AOs now makes it drop audio, where before only a warning was logged. This is only in case of AOs or drivers which exhibit unexpected (and now unsupported) behavior. This is a risky change. Although it's completely trivial conceptually, there are too many special cases. In addition, I barely tested it, and I've messed with it in a half-motivated state over a longer time, barely making any progress, and finishing it under a rush when I already should have been asleep. Most things seem to work, and I made superficial tests with alsa, sdl, and encode mode. This should cover most things, but there are a lot of tricky things that received no coverage. All this text means you should be prepared to roll back to an older commit and report your problem.
2020-05-24 23:53:41 +00:00
{
struct buffer_state *p = ao->buffer_state;
if ((!p->playing || p->paused) && !ao->stream_silence)
return false;
struct mp_pcm_state state;
get_dev_state(ao, &state);
if (p->streaming && !state.playing && !ao->untimed)
goto eof;
void **planes = NULL;
int space = state.free_samples;
if (!space)
return false;
assert(space >= 0);
int samples = 0;
bool got_eof = false;
if (ao->driver->write_frames) {
TA_FREEP(&p->pending);
samples = read_buffer(ao, NULL, 1, &got_eof, false);
planes = (void **)&p->pending;
} else {
if (!realloc_buf(ao, space)) {
MP_ERR(ao, "Failed to allocate buffer.\n");
return false;
}
planes = (void **)mp_aframe_get_data_rw(p->temp_buf);
assert(planes);
if (p->recover_pause) {
samples = MPCLAMP(p->prepause_state.delay * ao->samplerate, 0, space);
p->recover_pause = false;
mp_aframe_set_silence(p->temp_buf, 0, space);
}
if (!samples) {
samples = read_buffer(ao, planes, space, &got_eof, true);
if (p->paused || (ao->stream_silence && !p->playing))
samples = space; // read_buffer() sets remainder to silent
}
}
if (samples) {
MP_STATS(ao, "start ao fill");
if (!ao->driver->write(ao, planes, samples))
MP_ERR(ao, "Error writing audio to device.\n");
MP_STATS(ao, "end ao fill");
if (!p->streaming) {
MP_VERBOSE(ao, "starting AO\n");
ao->driver->start(ao);
p->streaming = true;
state.playing = true;
}
audio: merge pull/push ring buffer glue code This is preparation to further cleanups (and eventually actual improvements) of the audio output code. AOs are split into two classes: pull and push. Pull AOs let an audio callback of the native audio API read from a ring buffer. Push AOs expose a function that works similar to write(), and for which we start a "feeder" thread. It seems making this split was beneficial, because of the different data flow, and emulating the one or other in the AOs directly would have created code duplication (all the "pull" AOs had their own ring buffer implementation before it was cleaned up). Unfortunately, both types had completely separate implementations (in pull.c and push.c). The idea was that little can be shared anyway. But that's very annoying now, because I want to change the API between AO and player. This commit attempts to merge them. I've moved everything from push.c to pull.c, the trivial entrypoints from ao.c to pull.c, and attempted to reconcile the differences. It's a mess, but at least there's only one ring buffer within the AO code now. Everything should work mostly the same. Pull AOs now always copy the audio data under a lock; before this commit, all ring buffer access was lock-free (except for the decoder wakeup callback, which acquired a mutex). In theory, this is "bad", and people obsessed with lock-free stuff will hate me, but in practice probably won't matter. The planned change will probably remove this copying-under-lock again, but who knows when this will happen. One change for the push AOs now makes it drop audio, where before only a warning was logged. This is only in case of AOs or drivers which exhibit unexpected (and now unsupported) behavior. This is a risky change. Although it's completely trivial conceptually, there are too many special cases. In addition, I barely tested it, and I've messed with it in a half-motivated state over a longer time, barely making any progress, and finishing it under a rush when I already should have been asleep. Most things seem to work, and I made superficial tests with alsa, sdl, and encode mode. This should cover most things, but there are a lot of tricky things that received no coverage. All this text means you should be prepared to roll back to an older commit and report your problem.
2020-05-24 23:53:41 +00:00
}
MP_TRACE(ao, "in=%d space=%d(%d) pl=%d, eof=%d\n",
samples, space, state.free_samples, p->playing, got_eof);
if (got_eof)
goto eof;
return samples > 0 && (samples < space || ao->untimed);
eof:
MP_VERBOSE(ao, "audio end or underrun\n");
// Normal AOs signal EOF on underrun, untimed AOs never signal underruns.
if (ao->untimed || !state.playing || ao->stream_silence) {
p->streaming = state.playing && !ao->untimed;
p->playing = false;
}
ao->wakeup_cb(ao->wakeup_ctx);
// For ao_drain().
2023-10-21 02:55:41 +00:00
mp_cond_broadcast(&p->wakeup);
return true;
audio: merge pull/push ring buffer glue code This is preparation to further cleanups (and eventually actual improvements) of the audio output code. AOs are split into two classes: pull and push. Pull AOs let an audio callback of the native audio API read from a ring buffer. Push AOs expose a function that works similar to write(), and for which we start a "feeder" thread. It seems making this split was beneficial, because of the different data flow, and emulating the one or other in the AOs directly would have created code duplication (all the "pull" AOs had their own ring buffer implementation before it was cleaned up). Unfortunately, both types had completely separate implementations (in pull.c and push.c). The idea was that little can be shared anyway. But that's very annoying now, because I want to change the API between AO and player. This commit attempts to merge them. I've moved everything from push.c to pull.c, the trivial entrypoints from ao.c to pull.c, and attempted to reconcile the differences. It's a mess, but at least there's only one ring buffer within the AO code now. Everything should work mostly the same. Pull AOs now always copy the audio data under a lock; before this commit, all ring buffer access was lock-free (except for the decoder wakeup callback, which acquired a mutex). In theory, this is "bad", and people obsessed with lock-free stuff will hate me, but in practice probably won't matter. The planned change will probably remove this copying-under-lock again, but who knows when this will happen. One change for the push AOs now makes it drop audio, where before only a warning was logged. This is only in case of AOs or drivers which exhibit unexpected (and now unsupported) behavior. This is a risky change. Although it's completely trivial conceptually, there are too many special cases. In addition, I barely tested it, and I've messed with it in a half-motivated state over a longer time, barely making any progress, and finishing it under a rush when I already should have been asleep. Most things seem to work, and I made superficial tests with alsa, sdl, and encode mode. This should cover most things, but there are a lot of tricky things that received no coverage. All this text means you should be prepared to roll back to an older commit and report your problem.
2020-05-24 23:53:41 +00:00
}
2023-10-21 02:55:41 +00:00
static MP_THREAD_VOID playthread(void *arg)
audio: merge pull/push ring buffer glue code This is preparation to further cleanups (and eventually actual improvements) of the audio output code. AOs are split into two classes: pull and push. Pull AOs let an audio callback of the native audio API read from a ring buffer. Push AOs expose a function that works similar to write(), and for which we start a "feeder" thread. It seems making this split was beneficial, because of the different data flow, and emulating the one or other in the AOs directly would have created code duplication (all the "pull" AOs had their own ring buffer implementation before it was cleaned up). Unfortunately, both types had completely separate implementations (in pull.c and push.c). The idea was that little can be shared anyway. But that's very annoying now, because I want to change the API between AO and player. This commit attempts to merge them. I've moved everything from push.c to pull.c, the trivial entrypoints from ao.c to pull.c, and attempted to reconcile the differences. It's a mess, but at least there's only one ring buffer within the AO code now. Everything should work mostly the same. Pull AOs now always copy the audio data under a lock; before this commit, all ring buffer access was lock-free (except for the decoder wakeup callback, which acquired a mutex). In theory, this is "bad", and people obsessed with lock-free stuff will hate me, but in practice probably won't matter. The planned change will probably remove this copying-under-lock again, but who knows when this will happen. One change for the push AOs now makes it drop audio, where before only a warning was logged. This is only in case of AOs or drivers which exhibit unexpected (and now unsupported) behavior. This is a risky change. Although it's completely trivial conceptually, there are too many special cases. In addition, I barely tested it, and I've messed with it in a half-motivated state over a longer time, barely making any progress, and finishing it under a rush when I already should have been asleep. Most things seem to work, and I made superficial tests with alsa, sdl, and encode mode. This should cover most things, but there are a lot of tricky things that received no coverage. All this text means you should be prepared to roll back to an older commit and report your problem.
2020-05-24 23:53:41 +00:00
{
struct ao *ao = arg;
struct buffer_state *p = ao->buffer_state;
2023-10-21 02:55:41 +00:00
mp_thread_set_name("ao");
while (1) {
2023-10-21 02:55:41 +00:00
mp_mutex_lock(&p->lock);
bool retry = false;
if (!ao->driver->initially_blocked || p->initial_unblocked)
retry = ao_play_data(ao);
audio: merge pull/push ring buffer glue code This is preparation to further cleanups (and eventually actual improvements) of the audio output code. AOs are split into two classes: pull and push. Pull AOs let an audio callback of the native audio API read from a ring buffer. Push AOs expose a function that works similar to write(), and for which we start a "feeder" thread. It seems making this split was beneficial, because of the different data flow, and emulating the one or other in the AOs directly would have created code duplication (all the "pull" AOs had their own ring buffer implementation before it was cleaned up). Unfortunately, both types had completely separate implementations (in pull.c and push.c). The idea was that little can be shared anyway. But that's very annoying now, because I want to change the API between AO and player. This commit attempts to merge them. I've moved everything from push.c to pull.c, the trivial entrypoints from ao.c to pull.c, and attempted to reconcile the differences. It's a mess, but at least there's only one ring buffer within the AO code now. Everything should work mostly the same. Pull AOs now always copy the audio data under a lock; before this commit, all ring buffer access was lock-free (except for the decoder wakeup callback, which acquired a mutex). In theory, this is "bad", and people obsessed with lock-free stuff will hate me, but in practice probably won't matter. The planned change will probably remove this copying-under-lock again, but who knows when this will happen. One change for the push AOs now makes it drop audio, where before only a warning was logged. This is only in case of AOs or drivers which exhibit unexpected (and now unsupported) behavior. This is a risky change. Although it's completely trivial conceptually, there are too many special cases. In addition, I barely tested it, and I've messed with it in a half-motivated state over a longer time, barely making any progress, and finishing it under a rush when I already should have been asleep. Most things seem to work, and I made superficial tests with alsa, sdl, and encode mode. This should cover most things, but there are a lot of tricky things that received no coverage. All this text means you should be prepared to roll back to an older commit and report your problem.
2020-05-24 23:53:41 +00:00
// Wait until the device wants us to write more data to it.
// Fallback to guessing.
int64_t timeout = INT64_MAX;
if (p->streaming && !retry && (!p->paused || ao->stream_silence)) {
// Wake up again if half of the audio buffer has been played.
// Since audio could play at a faster or slower pace, wake up twice
// as often as ideally needed.
timeout = MP_TIME_S_TO_NS(ao->device_buffer / (double)ao->samplerate * 0.25);
}
audio: merge pull/push ring buffer glue code This is preparation to further cleanups (and eventually actual improvements) of the audio output code. AOs are split into two classes: pull and push. Pull AOs let an audio callback of the native audio API read from a ring buffer. Push AOs expose a function that works similar to write(), and for which we start a "feeder" thread. It seems making this split was beneficial, because of the different data flow, and emulating the one or other in the AOs directly would have created code duplication (all the "pull" AOs had their own ring buffer implementation before it was cleaned up). Unfortunately, both types had completely separate implementations (in pull.c and push.c). The idea was that little can be shared anyway. But that's very annoying now, because I want to change the API between AO and player. This commit attempts to merge them. I've moved everything from push.c to pull.c, the trivial entrypoints from ao.c to pull.c, and attempted to reconcile the differences. It's a mess, but at least there's only one ring buffer within the AO code now. Everything should work mostly the same. Pull AOs now always copy the audio data under a lock; before this commit, all ring buffer access was lock-free (except for the decoder wakeup callback, which acquired a mutex). In theory, this is "bad", and people obsessed with lock-free stuff will hate me, but in practice probably won't matter. The planned change will probably remove this copying-under-lock again, but who knows when this will happen. One change for the push AOs now makes it drop audio, where before only a warning was logged. This is only in case of AOs or drivers which exhibit unexpected (and now unsupported) behavior. This is a risky change. Although it's completely trivial conceptually, there are too many special cases. In addition, I barely tested it, and I've messed with it in a half-motivated state over a longer time, barely making any progress, and finishing it under a rush when I already should have been asleep. Most things seem to work, and I made superficial tests with alsa, sdl, and encode mode. This should cover most things, but there are a lot of tricky things that received no coverage. All this text means you should be prepared to roll back to an older commit and report your problem.
2020-05-24 23:53:41 +00:00
2023-10-21 02:55:41 +00:00
mp_mutex_unlock(&p->lock);
audio: merge pull/push ring buffer glue code This is preparation to further cleanups (and eventually actual improvements) of the audio output code. AOs are split into two classes: pull and push. Pull AOs let an audio callback of the native audio API read from a ring buffer. Push AOs expose a function that works similar to write(), and for which we start a "feeder" thread. It seems making this split was beneficial, because of the different data flow, and emulating the one or other in the AOs directly would have created code duplication (all the "pull" AOs had their own ring buffer implementation before it was cleaned up). Unfortunately, both types had completely separate implementations (in pull.c and push.c). The idea was that little can be shared anyway. But that's very annoying now, because I want to change the API between AO and player. This commit attempts to merge them. I've moved everything from push.c to pull.c, the trivial entrypoints from ao.c to pull.c, and attempted to reconcile the differences. It's a mess, but at least there's only one ring buffer within the AO code now. Everything should work mostly the same. Pull AOs now always copy the audio data under a lock; before this commit, all ring buffer access was lock-free (except for the decoder wakeup callback, which acquired a mutex). In theory, this is "bad", and people obsessed with lock-free stuff will hate me, but in practice probably won't matter. The planned change will probably remove this copying-under-lock again, but who knows when this will happen. One change for the push AOs now makes it drop audio, where before only a warning was logged. This is only in case of AOs or drivers which exhibit unexpected (and now unsupported) behavior. This is a risky change. Although it's completely trivial conceptually, there are too many special cases. In addition, I barely tested it, and I've messed with it in a half-motivated state over a longer time, barely making any progress, and finishing it under a rush when I already should have been asleep. Most things seem to work, and I made superficial tests with alsa, sdl, and encode mode. This should cover most things, but there are a lot of tricky things that received no coverage. All this text means you should be prepared to roll back to an older commit and report your problem.
2020-05-24 23:53:41 +00:00
2023-10-21 02:55:41 +00:00
mp_mutex_lock(&p->pt_lock);
if (p->terminate) {
2023-10-21 02:55:41 +00:00
mp_mutex_unlock(&p->pt_lock);
break;
}
if (!p->need_wakeup && !retry) {
MP_STATS(ao, "start audio wait");
mp_cond_timedwait(&p->pt_wakeup, &p->pt_lock, timeout);
audio: merge pull/push ring buffer glue code This is preparation to further cleanups (and eventually actual improvements) of the audio output code. AOs are split into two classes: pull and push. Pull AOs let an audio callback of the native audio API read from a ring buffer. Push AOs expose a function that works similar to write(), and for which we start a "feeder" thread. It seems making this split was beneficial, because of the different data flow, and emulating the one or other in the AOs directly would have created code duplication (all the "pull" AOs had their own ring buffer implementation before it was cleaned up). Unfortunately, both types had completely separate implementations (in pull.c and push.c). The idea was that little can be shared anyway. But that's very annoying now, because I want to change the API between AO and player. This commit attempts to merge them. I've moved everything from push.c to pull.c, the trivial entrypoints from ao.c to pull.c, and attempted to reconcile the differences. It's a mess, but at least there's only one ring buffer within the AO code now. Everything should work mostly the same. Pull AOs now always copy the audio data under a lock; before this commit, all ring buffer access was lock-free (except for the decoder wakeup callback, which acquired a mutex). In theory, this is "bad", and people obsessed with lock-free stuff will hate me, but in practice probably won't matter. The planned change will probably remove this copying-under-lock again, but who knows when this will happen. One change for the push AOs now makes it drop audio, where before only a warning was logged. This is only in case of AOs or drivers which exhibit unexpected (and now unsupported) behavior. This is a risky change. Although it's completely trivial conceptually, there are too many special cases. In addition, I barely tested it, and I've messed with it in a half-motivated state over a longer time, barely making any progress, and finishing it under a rush when I already should have been asleep. Most things seem to work, and I made superficial tests with alsa, sdl, and encode mode. This should cover most things, but there are a lot of tricky things that received no coverage. All this text means you should be prepared to roll back to an older commit and report your problem.
2020-05-24 23:53:41 +00:00
MP_STATS(ao, "end audio wait");
}
p->need_wakeup = false;
2023-10-21 02:55:41 +00:00
mp_mutex_unlock(&p->pt_lock);
audio: merge pull/push ring buffer glue code This is preparation to further cleanups (and eventually actual improvements) of the audio output code. AOs are split into two classes: pull and push. Pull AOs let an audio callback of the native audio API read from a ring buffer. Push AOs expose a function that works similar to write(), and for which we start a "feeder" thread. It seems making this split was beneficial, because of the different data flow, and emulating the one or other in the AOs directly would have created code duplication (all the "pull" AOs had their own ring buffer implementation before it was cleaned up). Unfortunately, both types had completely separate implementations (in pull.c and push.c). The idea was that little can be shared anyway. But that's very annoying now, because I want to change the API between AO and player. This commit attempts to merge them. I've moved everything from push.c to pull.c, the trivial entrypoints from ao.c to pull.c, and attempted to reconcile the differences. It's a mess, but at least there's only one ring buffer within the AO code now. Everything should work mostly the same. Pull AOs now always copy the audio data under a lock; before this commit, all ring buffer access was lock-free (except for the decoder wakeup callback, which acquired a mutex). In theory, this is "bad", and people obsessed with lock-free stuff will hate me, but in practice probably won't matter. The planned change will probably remove this copying-under-lock again, but who knows when this will happen. One change for the push AOs now makes it drop audio, where before only a warning was logged. This is only in case of AOs or drivers which exhibit unexpected (and now unsupported) behavior. This is a risky change. Although it's completely trivial conceptually, there are too many special cases. In addition, I barely tested it, and I've messed with it in a half-motivated state over a longer time, barely making any progress, and finishing it under a rush when I already should have been asleep. Most things seem to work, and I made superficial tests with alsa, sdl, and encode mode. This should cover most things, but there are a lot of tricky things that received no coverage. All this text means you should be prepared to roll back to an older commit and report your problem.
2020-05-24 23:53:41 +00:00
}
2023-10-21 02:55:41 +00:00
MP_THREAD_RETURN();
audio: merge pull/push ring buffer glue code This is preparation to further cleanups (and eventually actual improvements) of the audio output code. AOs are split into two classes: pull and push. Pull AOs let an audio callback of the native audio API read from a ring buffer. Push AOs expose a function that works similar to write(), and for which we start a "feeder" thread. It seems making this split was beneficial, because of the different data flow, and emulating the one or other in the AOs directly would have created code duplication (all the "pull" AOs had their own ring buffer implementation before it was cleaned up). Unfortunately, both types had completely separate implementations (in pull.c and push.c). The idea was that little can be shared anyway. But that's very annoying now, because I want to change the API between AO and player. This commit attempts to merge them. I've moved everything from push.c to pull.c, the trivial entrypoints from ao.c to pull.c, and attempted to reconcile the differences. It's a mess, but at least there's only one ring buffer within the AO code now. Everything should work mostly the same. Pull AOs now always copy the audio data under a lock; before this commit, all ring buffer access was lock-free (except for the decoder wakeup callback, which acquired a mutex). In theory, this is "bad", and people obsessed with lock-free stuff will hate me, but in practice probably won't matter. The planned change will probably remove this copying-under-lock again, but who knows when this will happen. One change for the push AOs now makes it drop audio, where before only a warning was logged. This is only in case of AOs or drivers which exhibit unexpected (and now unsupported) behavior. This is a risky change. Although it's completely trivial conceptually, there are too many special cases. In addition, I barely tested it, and I've messed with it in a half-motivated state over a longer time, barely making any progress, and finishing it under a rush when I already should have been asleep. Most things seem to work, and I made superficial tests with alsa, sdl, and encode mode. This should cover most things, but there are a lot of tricky things that received no coverage. All this text means you should be prepared to roll back to an older commit and report your problem.
2020-05-24 23:53:41 +00:00
}
void ao_unblock(struct ao *ao)
{
if (ao->driver->write) {
audio: merge pull/push ring buffer glue code This is preparation to further cleanups (and eventually actual improvements) of the audio output code. AOs are split into two classes: pull and push. Pull AOs let an audio callback of the native audio API read from a ring buffer. Push AOs expose a function that works similar to write(), and for which we start a "feeder" thread. It seems making this split was beneficial, because of the different data flow, and emulating the one or other in the AOs directly would have created code duplication (all the "pull" AOs had their own ring buffer implementation before it was cleaned up). Unfortunately, both types had completely separate implementations (in pull.c and push.c). The idea was that little can be shared anyway. But that's very annoying now, because I want to change the API between AO and player. This commit attempts to merge them. I've moved everything from push.c to pull.c, the trivial entrypoints from ao.c to pull.c, and attempted to reconcile the differences. It's a mess, but at least there's only one ring buffer within the AO code now. Everything should work mostly the same. Pull AOs now always copy the audio data under a lock; before this commit, all ring buffer access was lock-free (except for the decoder wakeup callback, which acquired a mutex). In theory, this is "bad", and people obsessed with lock-free stuff will hate me, but in practice probably won't matter. The planned change will probably remove this copying-under-lock again, but who knows when this will happen. One change for the push AOs now makes it drop audio, where before only a warning was logged. This is only in case of AOs or drivers which exhibit unexpected (and now unsupported) behavior. This is a risky change. Although it's completely trivial conceptually, there are too many special cases. In addition, I barely tested it, and I've messed with it in a half-motivated state over a longer time, barely making any progress, and finishing it under a rush when I already should have been asleep. Most things seem to work, and I made superficial tests with alsa, sdl, and encode mode. This should cover most things, but there are a lot of tricky things that received no coverage. All this text means you should be prepared to roll back to an older commit and report your problem.
2020-05-24 23:53:41 +00:00
struct buffer_state *p = ao->buffer_state;
2023-10-21 02:55:41 +00:00
mp_mutex_lock(&p->lock);
audio: merge pull/push ring buffer glue code This is preparation to further cleanups (and eventually actual improvements) of the audio output code. AOs are split into two classes: pull and push. Pull AOs let an audio callback of the native audio API read from a ring buffer. Push AOs expose a function that works similar to write(), and for which we start a "feeder" thread. It seems making this split was beneficial, because of the different data flow, and emulating the one or other in the AOs directly would have created code duplication (all the "pull" AOs had their own ring buffer implementation before it was cleaned up). Unfortunately, both types had completely separate implementations (in pull.c and push.c). The idea was that little can be shared anyway. But that's very annoying now, because I want to change the API between AO and player. This commit attempts to merge them. I've moved everything from push.c to pull.c, the trivial entrypoints from ao.c to pull.c, and attempted to reconcile the differences. It's a mess, but at least there's only one ring buffer within the AO code now. Everything should work mostly the same. Pull AOs now always copy the audio data under a lock; before this commit, all ring buffer access was lock-free (except for the decoder wakeup callback, which acquired a mutex). In theory, this is "bad", and people obsessed with lock-free stuff will hate me, but in practice probably won't matter. The planned change will probably remove this copying-under-lock again, but who knows when this will happen. One change for the push AOs now makes it drop audio, where before only a warning was logged. This is only in case of AOs or drivers which exhibit unexpected (and now unsupported) behavior. This is a risky change. Although it's completely trivial conceptually, there are too many special cases. In addition, I barely tested it, and I've messed with it in a half-motivated state over a longer time, barely making any progress, and finishing it under a rush when I already should have been asleep. Most things seem to work, and I made superficial tests with alsa, sdl, and encode mode. This should cover most things, but there are a lot of tricky things that received no coverage. All this text means you should be prepared to roll back to an older commit and report your problem.
2020-05-24 23:53:41 +00:00
p->initial_unblocked = true;
2023-10-21 02:55:41 +00:00
mp_mutex_unlock(&p->lock);
ao_wakeup_playthread(ao);
audio: merge pull/push ring buffer glue code This is preparation to further cleanups (and eventually actual improvements) of the audio output code. AOs are split into two classes: pull and push. Pull AOs let an audio callback of the native audio API read from a ring buffer. Push AOs expose a function that works similar to write(), and for which we start a "feeder" thread. It seems making this split was beneficial, because of the different data flow, and emulating the one or other in the AOs directly would have created code duplication (all the "pull" AOs had their own ring buffer implementation before it was cleaned up). Unfortunately, both types had completely separate implementations (in pull.c and push.c). The idea was that little can be shared anyway. But that's very annoying now, because I want to change the API between AO and player. This commit attempts to merge them. I've moved everything from push.c to pull.c, the trivial entrypoints from ao.c to pull.c, and attempted to reconcile the differences. It's a mess, but at least there's only one ring buffer within the AO code now. Everything should work mostly the same. Pull AOs now always copy the audio data under a lock; before this commit, all ring buffer access was lock-free (except for the decoder wakeup callback, which acquired a mutex). In theory, this is "bad", and people obsessed with lock-free stuff will hate me, but in practice probably won't matter. The planned change will probably remove this copying-under-lock again, but who knows when this will happen. One change for the push AOs now makes it drop audio, where before only a warning was logged. This is only in case of AOs or drivers which exhibit unexpected (and now unsupported) behavior. This is a risky change. Although it's completely trivial conceptually, there are too many special cases. In addition, I barely tested it, and I've messed with it in a half-motivated state over a longer time, barely making any progress, and finishing it under a rush when I already should have been asleep. Most things seem to work, and I made superficial tests with alsa, sdl, and encode mode. This should cover most things, but there are a lot of tricky things that received no coverage. All this text means you should be prepared to roll back to an older commit and report your problem.
2020-05-24 23:53:41 +00:00
}
}