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Code Issues Releases Wiki Activity

Always try to resync if the clock difference is large

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This commit is contained in:
Chris Robinson 2012-12-14 07:40:19 -08:00
parent f97eaec7ab
commit 582efcdb9b
1 changed files with 24 additions and 38 deletions
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62
apps/openmw/mwrender/videoplayer.cpp
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@ -11,7 +11,6 @@
#define MAX_AUDIOQ_SIZE (5 * 16 * 1024)
#define MAX_VIDEOQ_SIZE (5 * 256 * 1024)
#define AV_SYNC_THRESHOLD 0.01
#define AV_NOSYNC_THRESHOLD 10.0
#define SAMPLE_CORRECTION_PERCENT_MAX 10
#define AUDIO_DIFF_AVG_NB 20
@ -161,36 +160,26 @@ class MovieAudioDecoder : public MWSound::Sound_Decoder
if(is->av_sync_type == AV_SYNC_AUDIO_MASTER)
return samples_size;
double ref_clock = get_master_clock(is);
double diff = get_audio_clock(is) - ref_clock;
if(diff < AV_NOSYNC_THRESHOLD)
{
// accumulate the diffs
is->audio_diff_cum = diff + is->audio_diff_avg_coef *
is->audio_diff_cum;
if(is->audio_diff_avg_count < AUDIO_DIFF_AVG_NB)
is->audio_diff_avg_count++;
else
{
double avg_diff = is->audio_diff_cum * (1.0 - is->audio_diff_avg_coef);
if(fabs(avg_diff) >= is->audio_diff_threshold)
{
int n = av_get_bytes_per_sample(is->audio_st->codec->sample_fmt) *
is->audio_st->codec->channels;
int wanted_size = samples_size + ((int)(diff * is->audio_st->codec->sample_rate) * n);
wanted_size = std::max(0, wanted_size);
wanted_size = std::min(wanted_size, samples_size*2);
samples_size = wanted_size;
}
}
}
// accumulate the clock difference
double diff = get_audio_clock(is) - get_master_clock(is);
is->audio_diff_cum = diff + is->audio_diff_avg_coef *
is->audio_diff_cum;
if(is->audio_diff_avg_count < AUDIO_DIFF_AVG_NB)
is->audio_diff_avg_count++;
else
{
/* difference is TOO big; reset diff stuff */
is->audio_diff_avg_count = 0;
is->audio_diff_cum = 0;
double avg_diff = is->audio_diff_cum * (1.0 - is->audio_diff_avg_coef);
if(fabs(avg_diff) >= is->audio_diff_threshold)
{
int n = av_get_bytes_per_sample(is->audio_st->codec->sample_fmt) *
is->audio_st->codec->channels;
int wanted_size = samples_size + ((int)(diff * is->audio_st->codec->sample_rate) * n);
wanted_size = std::max(0, wanted_size);
wanted_size = std::min(wanted_size, samples_size*2);
samples_size = wanted_size;
}
}
return samples_size;
@ -499,15 +488,12 @@ void VideoState::video_refresh_timer()
diff = vp->pts - ref_clock;
/* Skip or repeat the frame. Take delay into account
FFPlay still doesn't "know if this is the best guess." */
sync_threshold = (delay > AV_SYNC_THRESHOLD) ? delay : AV_SYNC_THRESHOLD;
if(fabs(diff) < AV_NOSYNC_THRESHOLD)
{
if(diff <= -sync_threshold)
delay = 0;
else if(diff >= sync_threshold)
delay = 2 * delay;
}
* FFPlay still doesn't "know if this is the best guess." */
sync_threshold = std::max(delay, AV_SYNC_THRESHOLD);
if(diff <= -sync_threshold)
delay = 0;
else if(diff >= sync_threshold)
delay = 2 * delay;
}
this->frame_timer += delay;