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Commit Graph

15 Commits

Author SHA1 Message Date
Andreas Rheinhardt
8c6a67e6c4 avcodec/mv30: Inline constants
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@gmail.com>
2020-12-08 17:51:47 +01:00
Andreas Rheinhardt
90c4958640 avcodec/mv30: Reduce the size of tables used to initialize VLCs
By switching from ff_init_vlc_sparse() to ff_init_vlc_from_lengths() one
can remove the array of codes of type uint16_t here; given that the
symbols are the default ones (0,1,2,...), no explicit symbols table
needs to be added.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@gmail.com>
2020-12-08 17:51:47 +01:00
Andreas Rheinhardt
37f510d3f4 avcodec/mv30: Don't check for errors for complete VLCs
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@gmail.com>
2020-11-24 11:35:03 +01:00
Michael Niedermayer
2eb6417417 avcodec/mv30: Use unsigned in idct_1d()
Fixes: signed integer overflow: 2110302399 + 39074947 cannot be represented in type 'int'
Fixes: 27330/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_MV30_fuzzer-5664923153334272

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
2020-11-21 22:09:51 +01:00
Michael Niedermayer
77cdc68479 avcodec/mv30: Fix multiple integer overflows
Fixes: signed integer overflow: -895002 * 2400 cannot be represented in type 'int'
Fixes: 26052/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_MV30_fuzzer-5431812577558528

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
2020-10-17 14:36:11 +02:00
Michael Niedermayer
ddf2ba5497 avcodec/mv30: Fix several integer overflows in idct_1d()
Fixes: signed integer overflow: -1846510390 + -361755993 cannot be represented in type 'int'
Fixes: 23941/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_MV30_fuzzer-5654696631730176

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
2020-09-29 00:43:26 +02:00
Michael Niedermayer
142ae27b1d avcodec/mv30: Check remaining mask in decode_inter()
Fixes: timeout (too long -> 4sec)
Fixes: 25129/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_MV30_fuzzer-5642089713631232

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
2020-09-17 00:06:48 +02:00
Michael Niedermayer
3b8d5bcc31 avcodec/mv30: Fix integer overflows in idct2_1d()
Fixes: signed integer overflow: 6500736 * 473 cannot be represented in type 'int'
Fixes: 23259/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_MV30_fuzzer-5179394271477760

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
2020-07-02 17:18:55 +02:00
Michael Niedermayer
75e2ac4f07 avcodec/mv30: check mode_size vs. input space
Fixes: Timeout (longer than my patience vs 1sec)
Fixes: 22984/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_MV30_fuzzer-5630021988515840

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
2020-06-14 19:17:07 +02:00
Michael Niedermayer
7f817853cd avcodec/mv30: Fix multiple integer overflows in idct_1d()
Fixes: signed integer overflow: -4869937 * 473 cannot be represented in type 'int'
Fixes: 21934/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_MV30_fuzzer-5667289925156864

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
2020-06-04 23:58:49 +02:00
Michael Niedermayer
e73a251680 avcodec/mv30: Do not allow MVs outside the allocated image
Fixes: out of array read
Fixes: 21804/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_MV30_fuzzer-5673678898724864

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
2020-06-04 23:58:49 +02:00
Limin Wang
b1cc6b9496 avcodec/mv30: fix warning: suggest braces around initialization of subobject [-Wmissing-braces]
Signed-off-by: Limin Wang <lance.lmwang@gmail.com>
2020-05-14 09:15:25 +08:00
Peter Ross
1b59f3f844 avcodec/mv30: use aandcttables 2020-04-17 19:34:02 +10:00
Peter Ross
06dab51e68 avcodec/mv30: remove unused table elements 2020-04-17 19:34:02 +10:00
Paul B Mahol
481ebb1c8b avcodec: add MV30 decoder 2020-04-10 12:22:09 +02:00