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12 Commits

Author SHA1 Message Date
Tomas Härdin cb204f007b libavcodec/jpeg2000_parser: Localize m->bytes_read 
Another 6%
 2022-06-10 10:50:12 +02:00
Tomas Härdin ffc2d95674 libavcodec/jpeg2000_parser: Reindent 2022-06-10 10:50:12 +02:00
Tomas Härdin d6d7b78c46 libavcodec/jpeg2000_parser: Rearrange ifs 
A modest 8% improvement
 2022-06-10 10:50:12 +02:00
Tomas Härdin 01827beb70 libavcodec/jpeg2000_parser: LUTify info_marker() 
This speeds find_frame_end() up by 39% according to valgrind
 2022-06-10 10:50:12 +02:00
Tomas Härdin 6704c2dd19 libavcodec/jpeg2000_parser: next_state is just a temporary 2022-06-10 10:50:12 +02:00
Tomas Härdin 5cfc1b0595 libavcodec/jpeg2000_parser: Simplify, fix reset_context() 2022-06-10 10:50:12 +02:00
Tomas Härdin 1ee994e168 libavcodec/jpeg2000_parser: Speed up long skips 2022-06-10 10:50:12 +02:00
Michael Niedermayer 7dfa8040d6 avcodec/jpeg2000_parser: Check state!=0 
Fixes: out of array read
Fixes: 37664/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_JPEG2000_fuzzer-5893420460146688

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>
 2021-09-14 17:34:33 +02:00
Shaun Simpson 16102cada5 avcodec/jpeg2000_parser: Fix skipping of JP2 info markers by correctly reading marker size 
Signed-off-by: Shaun Simpson <shauns2029@gmail.com>
 2021-08-25 15:12:09 +02:00
Shaun Simpson 01284c01c1 avcodec/jpeg2000_parser: Fix parsing of tile-part header 
And frames where the end of frame marker is at the end of the buffer.

Signed-off-by: Shaun Simpson <shauns2029@gmail.com>
 2021-08-25 14:47:03 +02:00
Andreas Rheinhardt e625ae6092 avcodec: Constify all the AVCodecParsers 
Possible now that the next pointer no longer exists.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@gmail.com>
Signed-off-by: James Almer <jamrial@gmail.com>
 2021-04-27 10:43:16 -03:00
Gautam Ramakrishnan d09c35677d libavcodec/jpeg2000_parser: Add jpeg2000 parser 
I have attempted to write a JPEG2000 Parser. Have tested
by generating a file containing 14 frames, as mentioned
by Micheal. Have also tried testing with various packet
sizes by setting -frame_size option. Additionally,
fixed a few formatting issues as pointed out by Micheal.

Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
 2020-06-07 01:23:40 +02:00