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16 Commits
Author SHA1 Message Date
Michael Niedermayer bdea5aec2d avcodec/jpeg2000dec: Handle M_b = -1 
Fixes: runtime error: shift exponent -1 is negative
Fixes: runtime error: shift exponent 32 is too large for 32-bit type 'int'
Fixes: 471846062/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_JPEG2000_DEC_fuzzer-5835290976780288

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
 2026-03-02 18:12:40 +01:00
Michael Niedermayer 99515a3342 avcodec/jpeg2000htdec: Check Lcup and Lref 
Fixes: use of uninitialized memory
Fixes: 482494999/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_JPEG2000_DEC_fuzzer-6467586186608640

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
 2026-02-22 02:31:06 +00:00
Michael Niedermayer e1472a4e0c avcodec/jpeg2000dec: allow M_b == 31 
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
 2026-02-03 12:39:32 +01:00
Michael Niedermayer 224b3ff82a avcodec/jpeg2000htdec: Check pLSB 
Fixes: negative shift and other undefined shifts
Fixes: 462335934/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_JPEG2000_DEC_fuzzer-4538493775970304

Found-by:  continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
 2025-12-27 21:42:20 +00:00
Osamu WatanabeandPierre-Anthony Lemieux c893dcce31 avcodec/jpeg2000: Fix undefined behaviour in left shift operations 
Signed-off-by: Pierre-Anthony Lemieux <pal@palemieux.com>
 2024-12-07 15:41:30 -08:00
Osamu WatanabeandPierre-Anthony Lemieux 82467b635e avcodec/jpeg2000: Improve FF_DWT97_INT to pass ISO/IEC 15444-4 conformance tests 
Fixes https://trac.ffmpeg.org/ticket/10123

Signed-off-by: Pierre-Anthony Lemieux <pal@palemieux.com>
 2024-11-08 08:30:07 -08:00
Osamu WatanabeandPierre-Anthony Lemieux d88a988d3d avcodec/jpeg2000dec: Fix HT decoding 
Fixes incorrect handling of MAGB_P value in Ccap15.
Fixes bugs in HT block decoding.

Signed-off-by: Pierre-Anthony Lemieux <pal@palemieux.com>
 2024-08-10 09:22:51 -07:00
Osamu WatanabeandPierre-Anthony Lemieux 48b14732d8 avcodec/jpeg2000dec: Add support for placeholder passes 
See Rec. ITU-T T.814 | ISO/IEC 15444-15, Annex B.

Signed-off-by: Pierre-Anthony Lemieux <pal@palemieux.com>
 2024-08-10 09:22:44 -07:00
Pierre-Anthony LemieuxandOsamu Watanabe 249c66bb22 avcodec/jpeg2000dec: fix HT block decoder 
Addresses https://trac.ffmpeg.org/ticket/10905

Co-authored-by: Osamu Watanabe <owatanab@es.takushoku-u.ac.jp>
Signed-off-by: Pierre-Anthony Lemieux <pal@palemieux.com>
 2024-05-30 21:30:52 -07:00
Michael Niedermayer 7b7eea8e63 avcodec/jpeg2000htdec: warn about non zero roi shift 
Suggested-by: Tomas Härdin <git@haerdin.se>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
 2024-04-01 18:17:27 +02:00
Andreas Rheinhardt 790f793844 avutil/common: Don't auto-include mem.h 
There are lots of files that don't need it: The number of object
files that actually need it went down from 2011 to 884 here.

Keep it for external users in order to not cause breakages.

Also improve the other headers a bit while just at it.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
 2024-03-31 00:08:43 +01:00
Pierre-Anthony LemieuxandMichael Niedermayer a1384b4e86 avcodec/jpeg2000htdec: check if block decoding will exceed internal precision 
Intended to replace https://patchwork.ffmpeg.org/project/ffmpeg/patch/20230802000135.26482-3-michael@niedermayer.cc/
with a more accurate block decoding magnitude bound.

Fixes: 62433/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_JPEG2000_fuzzer-5828618092937216
Fixes: 58299/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_JPEG2000_fuzzer-5828618092937216
Previous-version-reviewed-by: Tomas Härdin <git@haerdin.se>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
 2023-12-14 23:53:10 +01:00
Michael Niedermayer 9549712056 avcodec/jpeg2000htdec: Consolidate jpeg2000 spec bits in jpeg2000_bitbuf_refill_backwards() 
Code should make more sense now

Fixes: out of array access
Fixes: 58299/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_JPEG2000_fuzzer-6627570448465920

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Reviewed-by: Pierre-Anthony Lemieux <pal@sandflow.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
 2023-08-05 19:52:00 +02:00
Michael Niedermayer 044ab532fc avcodec/jpeg2000htdec: Avoid freeing uninitialized pointers in ff_jpeg2000_decode_htj2k() 
Fixes: freeing of uninitialized pointers
Fixes: part of 58299

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Reviewed-by: Tomas Härdin <git@haerdin.se>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
 2023-08-04 00:06:26 +02:00
calebandMichael Niedermayer 043a9d09cb avcodec/jpeg2000htdec: Check for invalid magref length. 
Fixes: shift exponent -8 is negative
Fixes: 58328/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_JPEG2000_fuzzer-6007789196804096

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
 2023-06-23 02:06:45 +02:00
calebandPierre-Anthony Lemieux b9c42cdf8d avcodec/jpeg2000dec: add support for HTJ2K block decoding 
Signed-off-by: Pierre-Anthony Lemieux <pal@palemieux.com>
 2023-04-22 15:57:40 -07:00