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qtdemux: Add a comment why only positive cslg shifts are considered

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Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/1294>
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Sebastian Dröge 2021-11-12 11:36:31 +02:00 committed by GStreamer Marge Bot
parent a33e30cfc4
commit a6f3391c81
1 changed files with 9 additions and 1 deletions
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10
subprojects/gst-plugins-good/gst/isomp4/qtdemux.h
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@ -477,7 +477,15 @@ struct _QtDemuxStream
guint32 ctts_count;
gint32 ctts_soffset;
/* cslg */
/* cslg composition_to_dts_shift or based on the smallest negative
* composition time offset.
*
* This is unsigned because only negative composition time offsets /
* positive composition_to_dts_shift matter here. In all other cases,
* DTS/PTS can be inferred directly without ending up with PTS>DTS.
*
* See 14496-12 6.4
*/
guint64 cslg_shift;
/* fragmented */