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command: add vsync-ratio property

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This is very "illustrative", unlike the video-speed-correction
property, and thus useful. It can also be used to observe scheduling
errors, which are not detected by the core. (These happen due to
rounding errors; possibly not evne our fault, but coming from
files with rounded timestamps and so on.)
This commit is contained in:
wm4
2015-11-13 22:48:32 +01:00
parent 62b386c2fd
commit d5981924fe
5 changed files with 42 additions and 6 deletions
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11
player/video.c
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@@ -1001,6 +1001,8 @@ static void handle_display_sync_frame(struct MPContext *mpctx,
mpctx->total_avsync_change = 0;
update_av_diff(mpctx, time_left * opts->playback_speed);
mpctx->past_frames[0].num_vsyncs = num_vsyncs;
if (resample)
adjust_audio_speed(mpctx, vsync);
@@ -1177,9 +1179,10 @@ void write_video(struct MPContext *mpctx, double endpts)
mpctx->num_past_frames--;
MP_TARRAY_INSERT_AT(mpctx, mpctx->past_frames, mpctx->num_past_frames, 0,
(struct frame_info){0});
struct frame_info *frame_info = &mpctx->past_frames[0];
frame_info->pts = mpctx->next_frames[0]->pts;
mpctx->past_frames[0] = (struct frame_info){
.pts = mpctx->next_frames[0]->pts,
.num_vsyncs = -1,
};
calculate_frame_duration(mpctx);
struct vo_frame dummy = {
@@ -1193,7 +1196,7 @@ void write_video(struct MPContext *mpctx, double endpts)
dummy.frames[n] = mpctx->next_frames[n];
struct vo_frame *frame = vo_frame_ref(&dummy);
double diff = frame_info->approx_duration;
double diff = mpctx->past_frames[0].approx_duration;
if (opts->untimed || vo->driver->untimed)
diff = -1; // disable frame dropping and aspects of frame timing
if (diff >= 0) {