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22 Commits

Author SHA1 Message Date
Andreas Rheinhardt
a247ac640d avcodec: Constify AVCodecs 
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
Anton Khirnov
e15371061d lavu/mem: move the DECLARE_ALIGNED macro family to mem_internal on next+1 bump 
They are not properly namespaced and not intended for public use.
 2021-01-01 14:14:57 +01:00
Michael Niedermayer
6d71a25cc4 avcodec/agm: Fix off by 1 error in decode_inter_plane() 
Fixes: Regression since 1f20969457
Found-by: Paul B Mahol <onemda@gmail.com>
Reviewed-by: Paul B Mahol <onemda@gmail.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
 2020-09-10 23:31:10 +02:00
Michael Niedermayer
6d7e522103 avcodec/agm: Mark fill_pixels() as av_always_inline 
Speedup from 275sec to 142sec
Testcase: 24426/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_AGM_fuzzer-5639724379930624

Reviewed-by: Paul B Mahol <onemda@gmail.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
 2020-08-11 14:21:56 +02:00
Michael Niedermayer
a98eeb0c1e avcodec/agm: YUV420 without DCT needs even dimensions 
Fixes: out of array access
Fixes: 19892/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_AGM_fuzzer-5707525924323328

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
 2020-02-09 23:33:18 +01:00
Michael Niedermayer
5c151e1491 avcodec/agm: Test remaining data in decode_raw_intra_rgb() 
Fixes: Timeout (270sec -> 25ms)
Fixes: 20485/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_AGM_fuzzer-5636954207289344

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>
 2020-02-09 23:33:18 +01:00
Michael Niedermayer
1f20969457 avcodec/agm: Include block size in the MV check for flags == 3 
Fixes: out of array read
Fixes: 19331/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_AGM_fuzzer-5644115983466496

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
 2019-12-28 11:20:48 +01:00
Michael Niedermayer
7a1b30c871 avcodec/agm: Do not allow MVs out of the picture area as no edge is allocated 
Fixes: out of array access
Fixes: 18499/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_AGM_fuzzer-5749038406434816

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
 2019-12-10 16:09:14 +01:00
Michael Niedermayer
bfa8272f40 vcodec/agm: Alloc based on coded dimensions 
Fixes: out of array read
Fixes: 18715/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_AGM_fuzzer-5659333417500672

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>
 2019-11-15 21:31:43 +01:00
Michael Niedermayer
315a445933 avcodec/agm: Check for reference frame earlier 
Fixes: Timeout (14sec -  120ms)
Fixes: 17824/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_AGM_fuzzer-5639825457152000

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
 2019-10-20 19:57:51 +02:00
Michael Niedermayer
6ebbfb377f avcodec/agm: Fix overflow of signed shift 
Fixes: left shift of 1 by 31 places cannot be represented in type 'int'
Fixes: 15328/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_AGM_fuzzer-5637545171353600

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
 2019-07-19 21:42:38 +02:00
Michael Niedermayer
19af948e53 avcodec/agm: Check output size before allocation 
Fixes: OOM
Fixes: 14198/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_AGM_fuzzer-5723579234123776

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
 2019-04-30 21:25:01 +02:00
Michael Niedermayer
caa9b4ff89 avcodec/agm: Check that there is available input in read_code() 
Fixes: Timeout (46sec -> 7ms)
Fixes: 14030/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_AGM_fuzzer-5721258760601600

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
 2019-04-24 17:05:02 +02:00
Michael Niedermayer
df9ef925f9 avcodec/agm: remove ;; 
Reviewed-by: Paul B Mahol <onemda@gmail.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
 2019-04-21 23:29:04 +02:00
Michael Niedermayer
7ee7bb92e6 avcodec/agm: Check for too many too short codes in make_new_tree() 
Fixes: SEGV on unknown address
Fixes: 14198/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_AGM_fuzzer-5723579234123776

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>
 2019-04-21 23:29:04 +02:00
Michael Niedermayer
158efc045c avcodec/agm: Do not crash on invalid codes 
I do not know if such vlc trees are allowed in agm, I have no specification
So i do not know if these should be treated as error, or not.
But the code does contain a check for idx < 0 already ...

Fixes: Stack-buffer-overflow in get_tree_codes
Fixes: 14189/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_AGM_fuzzer-5745747003179008

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>
 2019-04-21 23:29:04 +02:00
Michael Niedermayer
3308e3da04 avcodec/agm: Check frame dimensions 
Fixes: out of array access
Fixes: 14110/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_AGM_fuzzer-5649184864075776

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>
 2019-04-11 19:25:42 +02:00
Paul B Mahol
7be8f7ac81 avcodec/agm: add support for non-dct coding 2019-04-11 11:49:43 +02:00
Paul B Mahol
0f28355974 avcodec/agm: add support for higher compression 2019-04-11 11:49:43 +02:00
Michael Niedermayer
2169a3f262 avcodec/agm: Fix integer overflow with w/h 
Fixes: negation of -2147483648 cannot be represented in type 'int'; cast to an unsigned type to negate this value to itself
Fixes: 13999/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_AGM_fuzzer-5644405991538688

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>
 2019-04-05 12:05:47 +02:00
Michael Niedermayer
8e3b01e20e avcodec/agm: More completely check size before using it 
Fixes: out of array access
Fixes: 13997/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_AGM_fuzzer-5701427252428800

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>
 2019-04-04 11:31:17 +02:00
Paul B Mahol
4e8cbbf70e avcodec: add Amuse Graphics decoder 
This work is sponsored by VideoLAN.
 2019-03-31 10:48:43 +02:00