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audio: do not require full audio chain reinit for speed changes

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Actually, it didn't really require that before (most work was avoided),
but some bits had to be run anyway. Separate the speed change into a
light-weight function, which merely updates already created filters, and
a heavy-weight one which messes with filter insertion.

This also happens to fix the case where the filters would "forget" the
current speed (force resampling, change speed, hit a volume control to
force af_volume insertion - it will reset speed and desync).

Since we now always run the light-weight function, remove the
af_scaletempo verbose message that is printed on speed setting. Other
than that, all setters are cheap.
This commit is contained in:
wm4 2015-11-04 21:31:53 +01:00
parent 8f7cf9443f
commit 3108a3a001
2 changed files with 65 additions and 59 deletions
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3
audio/filter/af_scaletempo.c
View File

@ -286,9 +286,6 @@ static void update_speed(struct af_instance *af, float speed)
s->frames_stride_scaled = s->scale * s->frames_stride;
s->frames_stride_error = MPMIN(s->frames_stride_error, s->frames_stride_scaled);
MP_VERBOSE(af, "%.3f speed * %.3f scale_nominal = %.3f\n",
s->speed, s->scale_nominal, s->scale);
}
// Initialization and runtime control

121
player/audio.c
View File

@ -43,16 +43,23 @@
#include "core.h"
#include "command.h"
static int update_playback_speed_filters(struct MPContext *mpctx)
// Use pitch correction only for speed adjustments by the user, not minor sync
// correction ones.
static int get_speed_method(struct MPContext *mpctx)
{
struct MPOpts *opts = mpctx->opts;
double speed = mpctx->audio_speed;
struct af_stream *afs = mpctx->d_audio->afilter;
return mpctx->opts->pitch_correction && mpctx->opts->playback_speed != 1.0
? AF_CONTROL_SET_PLAYBACK_SPEED : AF_CONTROL_SET_PLAYBACK_SPEED_RESAMPLE;
}
// Use pitch correction only for speed adjustments by the user, not minor
// sync correction ones.
bool use_pitch_correction = opts->pitch_correction &&
opts->playback_speed != 1.0;
// Try to reuse the existing filters to change playback speed. If it works,
// return true; if filter recreation is needed, return false.
static bool update_speed_filters(struct MPContext *mpctx)
{
struct af_stream *afs = mpctx->d_audio->afilter;
double speed = mpctx->audio_speed;
if (afs->initialized < 1)
return false;
// Make sure only exactly one filter changes speed; resetting them all
// and setting 1 filter is the easiest way to achieve this.
@ -60,54 +67,69 @@ static int update_playback_speed_filters(struct MPContext *mpctx)
af_control_all(afs, AF_CONTROL_SET_PLAYBACK_SPEED_RESAMPLE, &(double){1});
if (speed == 1.0)
return af_remove_by_label(afs, "playback-speed");
return !af_find_by_label(afs, "playback-speed");
// Compatibility: if the user uses --af=scaletempo, always use this
// filter to change speed. Don't insert a second filter (any) either.
if (!af_find_by_label(afs, "playback-speed") &&
af_control_any_rev(afs, AF_CONTROL_SET_PLAYBACK_SPEED, &speed))
return 0;
return true;
int method = AF_CONTROL_SET_PLAYBACK_SPEED_RESAMPLE;
if (use_pitch_correction)
method = AF_CONTROL_SET_PLAYBACK_SPEED;
return !!af_control_any_rev(afs, get_speed_method(mpctx), &speed);
}
if (!af_control_any_rev(afs, method, &speed)) {
if (af_remove_by_label(afs, "playback-speed") < 0)
return -1;
// Update speed, and insert/remove filters if necessary.
static void recreate_speed_filters(struct MPContext *mpctx)
{
struct af_stream *afs = mpctx->d_audio->afilter;
char *filter = method == AF_CONTROL_SET_PLAYBACK_SPEED
? "scaletempo" : "lavrresample";
if (af_add(afs, filter, "playback-speed", NULL) < 0)
return -1;
// Try again.
if (!af_control_any_rev(afs, method, &speed))
return -1;
}
if (update_speed_filters(mpctx))
return;
return 0;
if (af_remove_by_label(afs, "playback-speed") < 0)
goto fail;
if (mpctx->audio_speed == 1.0)
return;
int method = get_speed_method(mpctx);
char *filter = method == AF_CONTROL_SET_PLAYBACK_SPEED
? "scaletempo" : "lavrresample";
if (!af_add(afs, filter, "playback-speed", NULL))
goto fail;
if (!update_speed_filters(mpctx))
goto fail;
return;
fail:
mpctx->opts->playback_speed = 1.0;
mpctx->speed_factor_a = 1.0;
mpctx->audio_speed = 1.0;
mp_notify(mpctx, MP_EVENT_CHANGE_ALL, NULL);
}
static int recreate_audio_filters(struct MPContext *mpctx)
{
assert(mpctx->d_audio);
if (update_playback_speed_filters(mpctx) < 0) {
mpctx->opts->playback_speed = 1.0;
mpctx->speed_factor_a = 1.0;
mpctx->audio_speed = 1.0;
mp_notify(mpctx, MP_EVENT_CHANGE_ALL, NULL);
}
struct af_stream *afs = mpctx->d_audio->afilter;
if (afs->initialized < 1 && af_init(afs) < 0) {
MP_ERR(mpctx, "Couldn't find matching filter/ao format!\n");
return -1;
}
if (afs->initialized < 1 && af_init(afs) < 0)
goto fail;
recreate_speed_filters(mpctx);
if (afs->initialized < 1 && af_init(afs) < 0)
goto fail;
mixer_reinit_audio(mpctx->mixer, mpctx->ao, afs);
return 0;
fail:
MP_ERR(mpctx, "Couldn't find matching filter/ao format!\n");
return -1;
}
int reinit_audio_filters(struct MPContext *mpctx)
@ -117,33 +139,20 @@ int reinit_audio_filters(struct MPContext *mpctx)
return 0;
af_uninit(mpctx->d_audio->afilter);
if (af_init(mpctx->d_audio->afilter) < 0)
return -1;
if (recreate_audio_filters(mpctx) < 0)
return -1;
return 1;
return recreate_audio_filters(mpctx) < 0 ? -1 : 1;
}
// Call this if opts->playback_speed or mpctx->speed_correction changes.
// Call this if opts->playback_speed or mpctx->speed_factor_* change.
void update_playback_speed(struct MPContext *mpctx)
{
struct MPOpts *opts = mpctx->opts;
mpctx->audio_speed = mpctx->opts->playback_speed * mpctx->speed_factor_a;
mpctx->video_speed = mpctx->opts->playback_speed * mpctx->speed_factor_v;
double old_speed_factor_a = mpctx->speed_factor_a;
double old_audio_speed = mpctx->audio_speed;
mpctx->audio_speed = opts->playback_speed * mpctx->speed_factor_a;
mpctx->video_speed = opts->playback_speed * mpctx->speed_factor_v;
if (mpctx->speed_factor_a == old_speed_factor_a &&
mpctx->audio_speed == old_audio_speed)
if (!mpctx->d_audio)
return;
if (!mpctx->d_audio || mpctx->d_audio->afilter->initialized < 1)
return;
recreate_audio_filters(mpctx);
if (!update_speed_filters(mpctx))
recreate_audio_filters(mpctx);
}
void reset_audio_state(struct MPContext *mpctx)