mirror of
https://github.com/mpv-player/mpv
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b74c09efbf
This replaces the two buffers (ao_chain.ao_buffer in the core, and buffer_state.buffers in the AO) with a single queue. Instead of having a byte based buffer, the queue is simply a list of audio frames, as output by the decoder. This should make dataflow simpler and reduce copying. It also attempts to simplify fill_audio_out_buffers(), the function I always hated most, because it's full of subtle and buggy logic. Unfortunately, I got assaulted by corner cases, dumb features (attempt at seamless looping, really?), and other crap, so it got pretty complicated again. fill_audio_out_buffers() is still full of subtle and buggy logic. Maybe it got worse. On the other hand, maybe there really is some progress. Who knows. Originally, the data flow parts was meant to be in f_output_chain, but due to tricky interactions with the playloop code, it's now in the dummy filter in audio.c. At least this improves the way the audio PTS is passed to the encoder in encoding mode. Now it attempts to pass frames directly, along with the pts, which should minimize timestamp problems. But to be honest, encoder mode is one big kludge that shouldn't exist in this way. This commit should be considered pre-alpha code. There are lots of bugs still hiding.
127 lines
4.1 KiB
C
127 lines
4.1 KiB
C
/*
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* This file is part of mpv.
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*
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* mpv is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* mpv is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with mpv. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef MPLAYER_AUDIO_OUT_H
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#define MPLAYER_AUDIO_OUT_H
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#include <stdbool.h>
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#include "misc/bstr.h"
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#include "common/common.h"
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#include "audio/chmap.h"
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#include "audio/chmap_sel.h"
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enum aocontrol {
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// _VOLUME commands take struct ao_control_vol pointer for input/output.
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// If there's only one volume, SET should use average of left/right.
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AOCONTROL_GET_VOLUME,
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AOCONTROL_SET_VOLUME,
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// _MUTE commands take a pointer to bool
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AOCONTROL_GET_MUTE,
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AOCONTROL_SET_MUTE,
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// Has char* as argument, which contains the desired stream title.
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AOCONTROL_UPDATE_STREAM_TITLE,
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};
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// If set, then the queued audio data is the last. Note that after a while, new
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// data might be written again, instead of closing the AO.
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#define PLAYER_FINAL_CHUNK 1
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enum {
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AO_EVENT_RELOAD = 1,
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AO_EVENT_HOTPLUG = 2,
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AO_EVENT_INITIAL_UNBLOCK = 4,
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};
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enum {
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// Allow falling back to ao_null if nothing else works.
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AO_INIT_NULL_FALLBACK = 1 << 0,
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// Only accept multichannel configurations that are guaranteed to work
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// (i.e. not sending arbitrary layouts over HDMI).
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AO_INIT_SAFE_MULTICHANNEL_ONLY = 1 << 1,
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// Stream silence as long as no audio is playing.
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AO_INIT_STREAM_SILENCE = 1 << 2,
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// Force exclusive mode, i.e. lock out the system mixer.
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AO_INIT_EXCLUSIVE = 1 << 3,
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};
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typedef struct ao_control_vol {
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float left;
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float right;
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} ao_control_vol_t;
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struct ao_device_desc {
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const char *name; // symbolic name; will be set on ao->device
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const char *desc; // verbose human readable name
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};
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struct ao_device_list {
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struct ao_device_desc *devices;
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int num_devices;
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};
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struct ao;
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struct mpv_global;
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struct input_ctx;
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struct encode_lavc_context;
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struct ao_opts {
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struct m_obj_settings *audio_driver_list;
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char *audio_device;
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char *audio_client_name;
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double audio_buffer;
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};
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struct ao *ao_init_best(struct mpv_global *global,
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int init_flags,
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void (*wakeup_cb)(void *ctx), void *wakeup_ctx,
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struct encode_lavc_context *encode_lavc_ctx,
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int samplerate, int format, struct mp_chmap channels);
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void ao_uninit(struct ao *ao);
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void ao_get_format(struct ao *ao,
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int *samplerate, int *format, struct mp_chmap *channels);
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const char *ao_get_name(struct ao *ao);
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const char *ao_get_description(struct ao *ao);
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bool ao_untimed(struct ao *ao);
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int ao_control(struct ao *ao, enum aocontrol cmd, void *arg);
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void ao_set_gain(struct ao *ao, float gain);
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double ao_get_delay(struct ao *ao);
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void ao_reset(struct ao *ao);
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void ao_start(struct ao *ao);
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void ao_set_paused(struct ao *ao, bool paused);
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void ao_drain(struct ao *ao);
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bool ao_is_playing(struct ao *ao);
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struct mp_async_queue;
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struct mp_async_queue *ao_get_queue(struct ao *ao);
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int ao_query_and_reset_events(struct ao *ao, int events);
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int ao_add_events(struct ao *ao, int events);
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void ao_unblock(struct ao *ao);
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void ao_request_reload(struct ao *ao);
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void ao_hotplug_event(struct ao *ao);
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struct ao_hotplug;
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struct ao_hotplug *ao_hotplug_create(struct mpv_global *global,
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void (*wakeup_cb)(void *ctx),
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void *wakeup_ctx);
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void ao_hotplug_destroy(struct ao_hotplug *hp);
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bool ao_hotplug_check_update(struct ao_hotplug *hp);
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struct ao_device_list *ao_hotplug_get_device_list(struct ao_hotplug *hp);
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void ao_print_devices(struct mpv_global *global, struct mp_log *log);
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#endif /* MPLAYER_AUDIO_OUT_H */
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