a247ac640d
avcodec: Constify AVCodecs
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Given that the AVCodec.next pointer has now been removed, most of the
AVCodecs are not modified at all any more and can therefore be made
const (as this patch does); the only exceptions are the very few codecs
for external libraries that have a init_static_data callback.
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@gmail.com >
Signed-off-by: James Almer <jamrial@gmail.com >
2021-04-27 10:43:15 -03:00
17f91c07ef
avcodec/prosumer: Only memset(0) what is needed.
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Fixes: Timeout (11sec -> 0.08sec)
Fixes: 14406/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_PROSUMER_fuzzer-5151210148986880
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc >
2019-05-09 22:07:26 +02:00
c0ca67ba40
avcodec/prosumer: Check decoded size
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Fixes: Timeout (longer than i had patience for -> 2sec)
Fixes: 13205/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_PROSUMER_fuzzer-5105644481282048
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc >
2019-03-25 13:20:30 +01:00
62f8d27ef1
avcodec/prosumer: Error out if decompress() stops reading data
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if 0 is encountered in the LUT then decompress() will continue to output 0 bytes but never read more data.
Without a specification it is impossible to say if this is invalid or a feature.
None of the valid prosumer files tested cause a 0 to be read, so it is likely
not a intended feature.
Fixes: Timeout
Fixes: 11266/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_PROSUMER_fuzzer-5681827423977472
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc >
2019-01-20 21:42:20 +01:00
f0d48ac41f
avcodec/prosumer: Reduce lut size
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Signed-off-by: Michael Niedermayer <michael@niedermayer.cc >
2019-01-20 21:42:20 +01:00
d3b76c9993
avcodec/prosumer: Simplify code slightly in decompress()
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Signed-off-by: Michael Niedermayer <michael@niedermayer.cc >
2019-01-20 21:42:20 +01:00
66425add27
avcodec/prosumer: Simplify bit juggling of the c variable in decompress()
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Reviewed-by: Paul B Mahol <onemda@gmail.com >
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc >
2018-11-02 23:46:31 +01:00
1dfa0b6f36
avcodec/prosumer: Remove always true check in decompress()
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Reviewed-by: Paul B Mahol <onemda@gmail.com >
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc >
2018-11-02 23:46:31 +01:00
506839a3e9
avcodec/prosumer: Remove unneeded ()
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Reviewed-by: Paul B Mahol <onemda@gmail.com >
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc >
2018-11-02 23:46:31 +01:00
9acdf17b2c
avcodec/prosumer: Check for bytestream eof in decompress()
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Fixes: Infinite loop
Fixes: 10685/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_PROSUMER_fuzzer-5652236881887232
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Reviewed-by: Paul B Mahol <onemda@gmail.com >
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc >
2018-11-02 23:46:31 +01:00
0f36ad514c
avcodec/prosumer: Check remaining space in put byte context
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Fixes: Timeout
Fixes: 10053/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_PROSUMER_fuzzer-5636993883570176
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Reviewed-by: Paul B Mahol <onemda@gmail.com >
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc >
2018-09-24 00:49:30 +02:00
3b5945b146
avcodec/prosumer: Remove unused table element
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Reviewed-by: Paul B Mahol <onemda@gmail.com >
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc >
2018-09-24 00:49:30 +02:00
52b909b5c1
avcodec/prosumer: remove unneeded variable from vertical_predict
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Reviewed-by: Paul B Mahol <onemda@gmail.com >
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc >
2018-09-24 00:49:30 +02:00
093607f0cd
avcodec/prosumer: Rename do_shift() to vertical_predict()
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It seems what this function does is a vertical prediction filter, thus
the new name should improve understanding.
rename the related table_b too
Reviewed-by: Paul B Mahol <onemda@gmail.com >
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc >
2018-09-24 00:49:30 +02:00
0cd22fd752
avcodec/prosumer: mark src as const
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Reviewed-by: Paul B Mahol <onemda@gmail.com >
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc >
2018-09-24 00:49:30 +02:00
3c9ebcbc4d
avcodec/prosumer: Only scan as many elements as matter in fill_elements()
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Reviewed-by: Paul B Mahol <onemda@gmail.com >
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc >
2018-09-24 00:49:30 +02:00
fa1d3caef0
avcodec/prosumer: factorize e0 setting out
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Reviewed-by: Paul B Mahol <onemda@gmail.com >
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc >
2018-09-24 00:49:30 +02:00
e97951f458
avcodec/prosumer: Use 16bit instead of 32 for table
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Simplifies code and reduces needed memory
Reviewed-by: Paul B Mahol <onemda@gmail.com >
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc >
2018-09-24 00:49:30 +02:00
d3a9cb6bc8
avcodec/prosumer: Factorize the 2 loops in fill_elements()
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Reviewed-by: Paul B Mahol <onemda@gmail.com >
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc >
2018-09-24 00:49:30 +02:00
f24701b073
avcodec/prosumer: clean up loop end code in fill_elements()
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Reviewed-by: Paul B Mahol <onemda@gmail.com >
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc >
2018-09-24 00:49:30 +02:00
674727291b
avcodec/prosumer: Remove dead code
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Reviewed-by: Paul B Mahol <onemda@gmail.com >
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc >
2018-09-24 00:49:30 +02:00
4d87cd2882
avcodec/prosumer: fix some minor issues
2018-08-24 21:33:01 +02:00
aba720dce2
avcodec: add Brooktree ProSumer Video decoder
2018-08-24 21:07:01 +02:00
Andreas Rheinhardt