player: add video-sync=display-tempo

So far there was no way to sync video to display and have audio sync to
video without changes in pitch.

With this option the audio does not get resampled (pitch change) and
instead the corrected audio speed is applied to audio filters.

1 files changed, 11 insertions, 3 deletions

diff --git a/player/audio.c b/player/audio.c
index 9e1bb708d5..40a6a3a32a 100644
--- a/player/audio.c
+++ b/player/audio.c
@@ -64,9 +64,17 @@ static void update_speed_filters(struct MPContext *mpctx)
         speed = 1.0;
     }
 
-    if (mpctx->display_sync_active && mpctx->video_out->opts->video_sync == VS_DISP_ADROP) {
-        drop *= speed * resample;
-        resample = speed = 1.0;
+    if (mpctx->display_sync_active) {
+        switch (mpctx->video_out->opts->video_sync) {
+            case VS_DISP_ADROP:
+                drop *= speed * resample;
+                resample = speed = 1.0;
+                break;
+            case VS_DISP_TEMPO:
+                speed = mpctx->audio_speed;
+                resample = 1.0;
+                break;
+        }
     }
 
     mp_output_chain_set_audio_speed(ao_c->filter, speed, resample, drop);