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Code Issues Releases Activity

avformat/matroskadec: Add support for FlagCommentary

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Hint: Matroska actually provides a way to distinguish the cases of
"track is no commentary track" and "it is unknown whether the track
is a commentary track", but our disposition flags do not. Therefore
we need not use a CountedElement.

Reviewed-by: Ridley Combs <rcombs@rcombs.me>
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@gmail.com>
This commit is contained in:
Andreas Rheinhardt 2021-02-16 18:23:59 +01:00
parent 05ae0b239f
commit 18b3deee22
2 changed files with 6 additions and 1 deletions
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1
libavformat/matroska.h
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@ -98,6 +98,7 @@
#define MATROSKA_ID_TRACKFLAGENABLED 0xB9
#define MATROSKA_ID_TRACKFLAGDEFAULT 0x88
#define MATROSKA_ID_TRACKFLAGFORCED 0x55AA
#define MATROSKA_ID_TRACKFLAGCOMMENTARY 0x55AF
#define MATROSKA_ID_TRACKFLAGLACING 0x9C
#define MATROSKA_ID_TRACKMINCACHE 0x6DE7
#define MATROSKA_ID_TRACKMAXCACHE 0x6DF8

6
libavformat/matroskadec.c
View File

@ -250,6 +250,7 @@ typedef struct MatroskaTrack {
uint64_t default_duration;
uint64_t flag_default;
uint64_t flag_forced;
uint64_t flag_comment;
uint64_t seek_preroll;
MatroskaTrackVideo video;
MatroskaTrackAudio audio;
@ -409,7 +410,7 @@ typedef struct MatroskaDemuxContext {
// incomplete type (6.7.2 in C90, 6.9.2 in C99).
// Removing the sizes breaks MSVC.
static EbmlSyntax ebml_syntax[3], matroska_segment[9], matroska_track_video_color[15], matroska_track_video[19],
matroska_track[27], matroska_track_encoding[6], matroska_track_encodings[2],
matroska_track[28], matroska_track_encoding[6], matroska_track_encodings[2],
matroska_track_combine_planes[2], matroska_track_operation[2], matroska_tracks[2],
matroska_attachments[2], matroska_chapter_entry[9], matroska_chapter[6], matroska_chapters[2],
matroska_index_entry[3], matroska_index[2], matroska_tag[3], matroska_tags[2], matroska_seekhead[2],
@ -571,6 +572,7 @@ static EbmlSyntax matroska_track[] = {
{ MATROSKA_ID_TRACKLANGUAGE, EBML_STR, 0, 0, offsetof(MatroskaTrack, language), { .s = "eng" } },
{ MATROSKA_ID_TRACKDEFAULTDURATION, EBML_UINT, 0, 0, offsetof(MatroskaTrack, default_duration) },
{ MATROSKA_ID_TRACKTIMECODESCALE, EBML_FLOAT, 0, 0, offsetof(MatroskaTrack, time_scale), { .f = 1.0 } },
{ MATROSKA_ID_TRACKFLAGCOMMENTARY, EBML_UINT, 0, 0, offsetof(MatroskaTrack, flag_comment), { .u = 0 } },
{ MATROSKA_ID_TRACKFLAGDEFAULT, EBML_UINT, 0, 0, offsetof(MatroskaTrack, flag_default), { .u = 1 } },
{ MATROSKA_ID_TRACKFLAGFORCED, EBML_UINT, 0, 0, offsetof(MatroskaTrack, flag_forced), { .u = 0 } },
{ MATROSKA_ID_TRACKVIDEO, EBML_NEST, 0, 0, offsetof(MatroskaTrack, video), { .n = matroska_track_video } },
@ -2742,6 +2744,8 @@ static int matroska_parse_tracks(AVFormatContext *s)
st->disposition |= AV_DISPOSITION_DEFAULT;
if (track->flag_forced)
st->disposition |= AV_DISPOSITION_FORCED;
if (track->flag_comment)
st->disposition |= AV_DISPOSITION_COMMENT;
if (!st->codecpar->extradata) {
if (extradata) {