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6 commits

Author SHA1 Message Date
Michael Niedermayer
2c7975fe6f avcodec/qdmc: Check input space in qdmc_get_vlc() 
Fixes: Timeout (125sec -> 0.4sec)
Fixes: 18059/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_QDMC_fuzzer-5656195825664000

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>
 2019-10-12 13:21:50 +02:00
Michael Niedermayer
2921b45a38 avcodec/qdmc: Fix integer overflows in PRNG 
Fixes: signed integer overflow: 214013 * 2531011 cannot be represented in type 'int'
Fixes: 15254/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_QDMC_fuzzer-5698137026461696

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
 2019-06-26 21:25:56 +02:00
Paul B Mahol
d8ad8fd8bd avcodec/qdmc: check return code of ff_fft_init() 2018-09-08 15:43:46 +02:00
Muhammad Faiz
3caecf7ce8 avcodec: do not use init_static_data on some codecs 
They don't modify AVCodec, no needs to call it at register. They will be
wasteful if these codecs are unused. Instead, call static data initialization
at codecs' init.

Benchmark:
old: 51281340 decicycles in avcodec_register_all,       1 runs,      0 skips
new:  6738960 decicycles in avcodec_register_all,       1 runs,      0 skips

Reviewed-by: wm4 <nfxjfg@googlemail.com>
Reviewed-by: Michael Niedermayer <michael@niedermayer.cc>
Signed-off-by: Muhammad Faiz <mfcc64@gmail.com>
 2018-02-04 06:11:07 +07:00
Paul B Mahol
ba632efa93 avcodec/qdmc: silence gcc 6.2.0 warning 
Signed-off-by: Paul B Mahol <onemda@gmail.com>
 2017-02-10 17:04:56 +01:00
Paul B Mahol
90ac9f4094 avcodec: add QDMC decoder 
Signed-off-by: Paul B Mahol <onemda@gmail.com>
 2017-01-06 22:05:45 +01:00