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| author | Mark Harris <mark.hsj@gmail.com> | 2015-12-28 23:04:08 -0800 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2015-12-29 13:11:51 +0100 |
| commit | c51c08e0e70c186971385bdbb225f69edd4e3375 (patch) | |
| tree | cdced95a7ae4749374e575984e7e5c956c45f8a2 /libavcodec/golomb.h | |
| parent | efa666e0da5e5fd2ded2e7dce4191bf04ac35952 (diff) | |
| download | ffmpeg-c51c08e0e70c186971385bdbb225f69edd4e3375.tar.gz | |
avcodec: Use get_ue_golomb_long() when needed
get_ue_golomb() cannot decode values larger than 8190 (the maximum
value that can be golomb encoded in 25 bits) and produces the error
"Invalid UE golomb code" if a larger value is encountered. Use
get_ue_golomb_long() instead (which supports 63 bits, up to 4294967294)
when valid h264/hevc values can exceed 8190.
This updates decoding of the following values: (maximum)
first_mb_in_slice 36863* for level 5.2
abs_diff_pic_num_minus1 131071
difference_of_pic_nums_minus1 131071
idr_pic_id 65535
recovery_frame_cnt 65535
frame_packing_arrangement_id 4294967294
frame_packing_arrangement_repetition_period 16384
display_orientation_repetition_period 16384
An alternative would be to modify get_ue_golomb() to handle encoded
values of up to 49 bits as was done for get_se_golomb() in a92816c.
In that case get_ue_golomb() could continue to be used for all of
these except frame_packing_arrangement_id.
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
Diffstat (limited to 'libavcodec/golomb.h')
| -rw-r--r-- | libavcodec/golomb.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/libavcodec/golomb.h b/libavcodec/golomb.h index 5136a04845..d4df0b39c0 100644 --- a/libavcodec/golomb.h +++ b/libavcodec/golomb.h @@ -48,7 +48,7 @@ extern const int8_t ff_interleaved_se_golomb_vlc_code[256]; extern const uint8_t ff_interleaved_dirac_golomb_vlc_code[256]; /** - * read unsigned exp golomb code. + * Read an unsigned Exp-Golomb code in the range 0 to 8190. */ static inline int get_ue_golomb(GetBitContext *gb) { |