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| author | Andreas Rheinhardt <andreas.rheinhardt@outlook.com> | 2022-06-17 01:54:22 +0200 |
|---|---|---|
| committer | Andreas Rheinhardt <andreas.rheinhardt@outlook.com> | 2022-06-24 18:33:18 +0200 |
| commit | a367e435d816dfe6939ab9932e87c089fb1f3f73 (patch) | |
| tree | c0b3fdcfb8745cc11f2803df1be6e36e5214795a /libavcodec/av1.h | |
| parent | 67eea6cf026a70940ea402d54685d67c660b49cd (diff) | |
| download | ffmpeg-a367e435d816dfe6939ab9932e87c089fb1f3f73.tar.gz | |
avcodec/av1: Add upper bound for the size of a sane sequence header
It will be used by the Matroska muxer to reserve a certain number
of bytes for the CodecPrivate in case no extradata is initially
available (as it is for the libaom-av1 encoder).
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
Diffstat (limited to 'libavcodec/av1.h')
| -rw-r--r-- | libavcodec/av1.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/libavcodec/av1.h b/libavcodec/av1.h index 951a18ecb2..384f7cddc7 100644 --- a/libavcodec/av1.h +++ b/libavcodec/av1.h @@ -175,4 +175,10 @@ enum { AV1_RESTORE_SWITCHABLE = 3, }; +// Sequence Headers are actually unbounded because one can use +// an arbitrary number of leading zeroes when encoding via uvlc. +// The following estimate is based around using the lowest number +// of bits for uvlc encoding. +#define AV1_SANE_SEQUENCE_HEADER_MAX_BITS 3138 + #endif /* AVCODEC_AV1_H */ |