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mpv/audio/mixer.c
wm4 7329101478 mixer: always restore volume (even with pulse), don't unmute
Be less clever, and restore the volume state even with AOs like pulse,
which have per-application audio.

Before this commit we didn't do this, because the volume is global (even
if per-application), so the volume will persist between invocations. But
to me it looks like always restoring is less tricky and makes for easier
to understand semantics.

Also, don't always unmute on exit. Unmuting was done even with ao_pulse,
and interfered with user expectations (see #1107).

This might annoy some users, because mpv will change the volume all the
time. We will see.

Fixes #1107.
2014-09-20 02:02:29 +02:00

382 lines
12 KiB
C

/*
* This file is part of MPlayer.
*
* MPlayer is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* MPlayer 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with MPlayer; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include <string.h>
#include <stdio.h>
#include <math.h>
#include <libavutil/common.h>
#include "config.h"
#include "audio/out/ao.h"
#include "audio/filter/af.h"
#include "common/global.h"
#include "common/msg.h"
#include "talloc.h"
#include "mixer.h"
struct mixer {
struct mp_log *log;
struct MPOpts *opts;
struct ao *ao;
struct af_stream *af;
// Static, dependent on ao/softvol settings
bool softvol; // use AO (true) or af_volume (false)
bool ao_softvol; // AO has private or per-app volume
bool emulate_mute; // if true, emulate mute with volume=0
// Last known values (possibly out of sync with reality)
float vol_l, vol_r;
bool muted;
// Used to decide whether we should unmute on uninit
bool muted_by_us;
/* Contains ao driver name or "softvol" if volume is not persistent
* and needs to be restored after the driver is reinitialized. */
const char *driver;
// Other stuff
float balance;
};
struct mixer *mixer_init(void *talloc_ctx, struct mpv_global *global)
{
struct mixer *mixer = talloc_ptrtype(talloc_ctx, mixer);
*mixer = (struct mixer) {
.log = mp_log_new(mixer, global->log, "mixer"),
.opts = global->opts,
.vol_l = 100,
.vol_r = 100,
.driver = "",
};
return mixer;
}
bool mixer_audio_initialized(struct mixer *mixer)
{
return !!mixer->ao;
}
float mixer_getneutralvolume(struct mixer *mixer)
{
// gain == 1
return 1.0 / mixer->opts->softvol_max * 100.0 * 100.0;
}
static void checkvolume(struct mixer *mixer)
{
if (!mixer->ao)
return;
ao_control_vol_t vol = {mixer->vol_l, mixer->vol_r};
if (mixer->softvol) {
float gain;
if (!af_control_any_rev(mixer->af, AF_CONTROL_GET_VOLUME, &gain))
gain = 1.0;
vol.left = (gain / (mixer->opts->softvol_max / 100.0)) * 100.0;
vol.right = (gain / (mixer->opts->softvol_max / 100.0)) * 100.0;
} else {
// Rely on the values not changing if the query is not supported
ao_control(mixer->ao, AOCONTROL_GET_VOLUME, &vol);
ao_control(mixer->ao, AOCONTROL_GET_MUTE, &mixer->muted);
}
float l = mixer->vol_l;
float r = mixer->vol_r;
if (mixer->emulate_mute && mixer->muted)
l = r = 0;
/* Try to detect cases where the volume has been changed by some external
* action (such as something else changing a shared system-wide volume).
* We don't test for exact equality, as some AOs may round the value
* we last set to some nearby supported value. 3 has been the default
* volume step for increase/decrease keys, and is apparently big enough
* to step to the next possible value in most setups.
*/
if (FFABS(vol.left - l) >= 3 || FFABS(vol.right - r) >= 3) {
mixer->vol_l = vol.left;
mixer->vol_r = vol.right;
if (mixer->emulate_mute)
mixer->muted = false;
}
mixer->muted_by_us &= mixer->muted;
}
void mixer_getvolume(struct mixer *mixer, float *l, float *r)
{
checkvolume(mixer);
*l = mixer->vol_l;
*r = mixer->vol_r;
}
static void setvolume_internal(struct mixer *mixer, float l, float r)
{
struct ao_control_vol vol = {.left = l, .right = r};
if (!mixer->softvol) {
if (ao_control(mixer->ao, AOCONTROL_SET_VOLUME, &vol) != CONTROL_OK)
MP_ERR(mixer, "Failed to change audio output volume.\n");
return;
}
float gain = (l + r) / 2.0 / 100.0 * mixer->opts->softvol_max / 100.0;
if (!af_control_any_rev(mixer->af, AF_CONTROL_SET_VOLUME, &gain)) {
MP_VERBOSE(mixer, "Inserting volume filter.\n");
if (!(af_add(mixer->af, "volume", NULL)
&& af_control_any_rev(mixer->af, AF_CONTROL_SET_VOLUME, &gain)))
MP_ERR(mixer, "No volume control available.\n");
}
}
void mixer_setvolume(struct mixer *mixer, float l, float r)
{
checkvolume(mixer); // to check mute status
if (mixer->vol_l == l && mixer->vol_r == r)
return; // just prevent af_volume insertion when not needed
mixer->vol_l = av_clipf(l, 0, 100);
mixer->vol_r = av_clipf(r, 0, 100);
if (mixer->ao && !(mixer->emulate_mute && mixer->muted))
setvolume_internal(mixer, mixer->vol_l, mixer->vol_r);
}
void mixer_getbothvolume(struct mixer *mixer, float *b)
{
float mixer_l, mixer_r;
mixer_getvolume(mixer, &mixer_l, &mixer_r);
*b = (mixer_l + mixer_r) / 2;
}
void mixer_setmute(struct mixer *mixer, bool mute)
{
checkvolume(mixer);
if (mute == mixer->muted)
return;
if (mixer->ao) {
mixer->muted = mute;
mixer->muted_by_us = mute;
if (mixer->emulate_mute) {
setvolume_internal(mixer, mixer->vol_l*!mute, mixer->vol_r*!mute);
} else {
ao_control(mixer->ao, AOCONTROL_SET_MUTE, &mute);
}
checkvolume(mixer);
} else {
mixer->muted = mute;
mixer->muted_by_us = mute;
}
}
bool mixer_getmute(struct mixer *mixer)
{
checkvolume(mixer);
return mixer->muted;
}
void mixer_addvolume(struct mixer *mixer, float step)
{
float vol_l, vol_r;
mixer_getvolume(mixer, &vol_l, &vol_r);
mixer_setvolume(mixer, vol_l + step, vol_r + step);
}
void mixer_getbalance(struct mixer *mixer, float *val)
{
if (mixer->af)
af_control_any_rev(mixer->af, AF_CONTROL_GET_PAN_BALANCE, &mixer->balance);
*val = mixer->balance;
}
/* NOTE: Currently the balance code is seriously buggy: it always changes
* the af_pan mapping between the first two input channels and first two
* output channels to particular values. These values make sense for an
* af_pan instance that was automatically inserted for balance control
* only and is otherwise an identity transform, but if the filter was
* there for another reason, then ignoring and overriding the original
* values is completely wrong.
*/
void mixer_setbalance(struct mixer *mixer, float val)
{
struct af_instance *af_pan_balance;
mixer->balance = val;
if (!mixer->af)
return;
if (af_control_any_rev(mixer->af, AF_CONTROL_SET_PAN_BALANCE, &val))
return;
if (val == 0)
return;
if (!(af_pan_balance = af_add(mixer->af, "pan", NULL))) {
MP_ERR(mixer, "No balance control available.\n");
return;
}
/* make all other channels pass thru since by default pan blocks all */
for (int i = 2; i < AF_NCH; i++) {
float level[AF_NCH] = {0};
level[i] = 1.f;
af_control_ext_t arg_ext = { .ch = i, .arg = level };
af_pan_balance->control(af_pan_balance, AF_CONTROL_SET_PAN_LEVEL,
&arg_ext);
}
af_pan_balance->control(af_pan_balance, AF_CONTROL_SET_PAN_BALANCE, &val);
}
char *mixer_get_volume_restore_data(struct mixer *mixer)
{
if (!mixer->driver[0])
return NULL;
return talloc_asprintf(NULL, "%s:%f:%f:%d:%f", mixer->driver, mixer->vol_l,
mixer->vol_r, mixer->muted_by_us,
mixer->opts->softvol_max);
}
static void probe_softvol(struct mixer *mixer)
{
mixer->ao_softvol =
ao_control(mixer->ao, AOCONTROL_HAS_SOFT_VOLUME, 0) == 1 ||
ao_control(mixer->ao, AOCONTROL_HAS_PER_APP_VOLUME, 0) == 1;
if (mixer->opts->softvol == SOFTVOL_AUTO) {
// No system-wide volume => fine with AO volume control.
mixer->softvol = !mixer->ao_softvol;
} else {
mixer->softvol = mixer->opts->softvol == SOFTVOL_YES;
}
// If we can't use real volume control => force softvol.
if (!mixer->softvol) {
ao_control_vol_t vol;
if (ao_control(mixer->ao, AOCONTROL_GET_VOLUME, &vol) != CONTROL_OK) {
mixer->softvol = true;
MP_WARN(mixer, "Hardware volume control unavailable.\n");
}
}
// Probe native mute support.
mixer->emulate_mute = true;
if (!mixer->softvol) {
if (ao_control(mixer->ao, AOCONTROL_GET_MUTE, &(bool){0}) == CONTROL_OK)
mixer->emulate_mute = false;
}
}
static void restore_volume(struct mixer *mixer)
{
struct MPOpts *opts = mixer->opts;
struct ao *ao = mixer->ao;
float force_vol_l = -1, force_vol_r = -1;
int force_mute = -1;
const char *prev_driver = mixer->driver;
mixer->driver = mixer->softvol ? "softvol" : ao_get_name(ao);
bool restore = mixer->softvol || mixer->ao_softvol;
// Restore old parameters if volume won't survive reinitialization.
// But not if volume scale is possibly different.
if (restore && strcmp(mixer->driver, prev_driver) == 0) {
force_vol_l = mixer->vol_l;
force_vol_r = mixer->vol_r;
}
// Set mute if we disabled it on uninit last time.
if (mixer->muted_by_us)
force_mute = 1;
// Set parameters from command line.
if (opts->mixer_init_volume >= 0)
force_vol_l = force_vol_r = opts->mixer_init_volume;
if (opts->mixer_init_mute >= 0)
force_mute = opts->mixer_init_mute;
// Set parameters from playback resume.
char *data = mixer->opts->mixer_restore_volume_data;
if (restore && data && data[0]) {
char drv[40];
float v_l, v_r, s;
int m;
if (sscanf(data, "%39[^:]:%f:%f:%d:%f", drv, &v_l, &v_r, &m, &s) == 5) {
float diff = fabs(mixer->opts->softvol_max - s);
if (strcmp(mixer->driver, drv) == 0 && diff < 0.01) {
force_vol_l = v_l;
force_vol_r = v_r;
force_mute = !!m;
}
}
talloc_free(mixer->opts->mixer_restore_volume_data);
mixer->opts->mixer_restore_volume_data = NULL;
}
// Using --volume should not reset the volume on every file (i.e. reinit),
// OTOH mpv --{ --volume 10 f1.mkv --} --{ --volume 20 f2.mkv --} must work.
// Resetting the option volumes to "auto" (-1) is easiest. If file local
// options (as shown above) are used, the option handler code will reset
// them to other values, and force the volume to be reset as well.
opts->mixer_init_volume = -1;
opts->mixer_init_mute = -1;
checkvolume(mixer);
if (force_vol_l >= 0 && force_vol_r >= 0)
mixer_setvolume(mixer, force_vol_l, force_vol_r);
if (force_mute >= 0)
mixer_setmute(mixer, force_mute);
}
// Called after the audio filter chain is built or rebuilt.
// (Can be called multiple times, even without mixer_uninit() in-between.)
void mixer_reinit_audio(struct mixer *mixer, struct ao *ao, struct af_stream *af)
{
if (!ao || !af)
return;
mixer->ao = ao;
mixer->af = af;
probe_softvol(mixer);
restore_volume(mixer);
if (mixer->balance != 0)
mixer_setbalance(mixer, mixer->balance);
}
/* Called before uninitializing the audio filter chain. The main purpose is to
* turn off mute, in case it's a global/persistent setting which might
* otherwise be left enabled even after this player instance exits.
*/
void mixer_uninit_audio(struct mixer *mixer)
{
if (!mixer->ao)
return;
checkvolume(mixer);
if (mixer->muted_by_us && !mixer->softvol && !mixer->ao_softvol) {
/* Current audio output API combines playing the remaining buffered
* audio and uninitializing the AO into one operation, even though
* ideally unmute would happen between those two steps. We can't do
* volume changes after uninitialization, but we don't want the
* remaining audio to play at full volume either. Thus this
* workaround to drop remaining audio first. */
ao_reset(mixer->ao);
mixer_setmute(mixer, false);
/* We remember mute status and re-enable it if we play more audio
* in the same process. */
mixer->muted_by_us = true;
}
mixer->ao = NULL;
mixer->af = NULL;
}