audio: fix timestamps

Accidentally broken in b6af44d3. For ad_lavc (and in general), the PTS
was not updated correctly when filtering only parts of audio frames,
and for ad_mpg123 and ad_spdif the PTS was additionally offset by the
frame size.

This could lead to incorrect time display, and possibly broken A/V sync.

1 files changed, 1 insertions, 0 deletions

diff --git a/audio/decode/dec_audio.c b/audio/decode/dec_audio.c
index a090f9a707..38044b4657 100644
--- a/audio/decode/dec_audio.c
+++ b/audio/decode/dec_audio.c
@@ -262,6 +262,7 @@ static int filter_n_bytes(struct dec_audio *da, struct mp_audio_buffer *outbuf,
             append.samples = copy;
             mp_audio_buffer_append(da->decode_buffer, &append);
             mp_audio_skip_samples(&da->decoded, copy);
+            da->pts_offset += copy;
             continue;
         }
         error = da->ad_driver->decode_packet(da);