Discussion:
[PATCH] matroska: Decode the seek preroll tag
(too old to reply)
Luca Barbato
2018-06-27 23:08:12 UTC
Permalink
Defined in https://datatracker.ietf.org/doc/html/draft-lhomme-cellar-matroska-04#section-8.2.86
---
libavformat/matroska.h | 1 +
libavformat/matroskadec.c | 2 ++
2 files changed, 3 insertions(+)

diff --git a/libavformat/matroska.h b/libavformat/matroska.h
index 4e9f96e530..eda1dafa91 100644
--- a/libavformat/matroska.h
+++ b/libavformat/matroska.h
@@ -87,6 +87,7 @@
#define MATROSKA_ID_CODECDOWNLOADURL 0x26B240
#define MATROSKA_ID_CODECDECODEALL 0xAA
#define MATROSKA_ID_CODECDELAY 0x56AA
+#define MATROSKA_ID_SEEKPREROLL 0x56BB
#define MATROSKA_ID_TRACKNAME 0x536E
#define MATROSKA_ID_TRACKLANGUAGE 0x22B59C
#define MATROSKA_ID_TRACKFLAGENABLED 0xB9
diff --git a/libavformat/matroskadec.c b/libavformat/matroskadec.c
index 9c8aea36ff..2c29a3e909 100644
--- a/libavformat/matroskadec.c
+++ b/libavformat/matroskadec.c
@@ -171,6 +171,7 @@ typedef struct MatroskaTrack {
MatroskaTrackAudio audio;
EbmlList encodings;
uint64_t codec_delay;
+ uint64_t seek_preroll;

AVStream *stream;
int64_t end_timecode;
@@ -383,6 +384,7 @@ static EbmlSyntax matroska_track[] = {
{ MATROSKA_ID_CODECID, EBML_STR, 0, offsetof(MatroskaTrack, codec_id) },
{ MATROSKA_ID_CODECPRIVATE, EBML_BIN, 0, offsetof(MatroskaTrack, codec_priv) },
{ MATROSKA_ID_CODECDELAY, EBML_UINT, 0, offsetof(MatroskaTrack, codec_delay) },
+ { MATROSKA_ID_SEEKPREROLL, EBML_UINT, 0, offsetof(MatroskaTrack, seek_preroll) },
{ MATROSKA_ID_TRACKLANGUAGE, EBML_UTF8, 0, offsetof(MatroskaTrack, language), { .s = "eng" } },
{ MATROSKA_ID_TRACKDEFAULTDURATION, EBML_UINT, 0, offsetof(MatroskaTrack, default_duration) },
{ MATROSKA_ID_TRACKTIMECODESCALE, EBML_FLOAT, 0, offsetof(MatroskaTrack, time_scale), { .f = 1.0 } },
--
2.12.2
Luca Barbato
2018-07-13 00:06:30 UTC
Permalink
Post by Luca Barbato
Defined in https://datatracker.ietf.org/doc/html/draft-lhomme-cellar-matroska-04#section-8.2.86
---
libavformat/matroska.h | 1 +
libavformat/matroskadec.c | 2 ++
2 files changed, 3 insertions(+)
diff --git a/libavformat/matroska.h b/libavformat/matroska.h
index 4e9f96e530..eda1dafa91 100644
--- a/libavformat/matroska.h
+++ b/libavformat/matroska.h
@@ -87,6 +87,7 @@
#define MATROSKA_ID_CODECDOWNLOADURL 0x26B240
#define MATROSKA_ID_CODECDECODEALL 0xAA
#define MATROSKA_ID_CODECDELAY 0x56AA
+#define MATROSKA_ID_SEEKPREROLL 0x56BB
#define MATROSKA_ID_TRACKNAME 0x536E
#define MATROSKA_ID_TRACKLANGUAGE 0x22B59C
#define MATROSKA_ID_TRACKFLAGENABLED 0xB9
diff --git a/libavformat/matroskadec.c b/libavformat/matroskadec.c
index 9c8aea36ff..2c29a3e909 100644
--- a/libavformat/matroskadec.c
+++ b/libavformat/matroskadec.c
@@ -171,6 +171,7 @@ typedef struct MatroskaTrack {
MatroskaTrackAudio audio;
EbmlList encodings;
uint64_t codec_delay;
+ uint64_t seek_preroll;
AVStream *stream;
int64_t end_timecode;
@@ -383,6 +384,7 @@ static EbmlSyntax matroska_track[] = {
{ MATROSKA_ID_CODECID, EBML_STR, 0, offsetof(MatroskaTrack, codec_id) },
{ MATROSKA_ID_CODECPRIVATE, EBML_BIN, 0, offsetof(MatroskaTrack, codec_priv) },
{ MATROSKA_ID_CODECDELAY, EBML_UINT, 0, offsetof(MatroskaTrack, codec_delay) },
+ { MATROSKA_ID_SEEKPREROLL, EBML_UINT, 0, offsetof(MatroskaTrack, seek_preroll) },
{ MATROSKA_ID_TRACKLANGUAGE, EBML_UTF8, 0, offsetof(MatroskaTrack, language), { .s = "eng" } },
{ MATROSKA_ID_TRACKDEFAULTDURATION, EBML_UINT, 0, offsetof(MatroskaTrack, default_duration) },
{ MATROSKA_ID_TRACKTIMECODESCALE, EBML_FLOAT, 0, offsetof(MatroskaTrack, time_scale), { .f = 1.0 } },
Ping.

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