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21 Commits

Author SHA1 Message Date
Michael Niedermayer
8754ccd3b3 avcodec/pixlet: Fixes: undefined shift in av_mod_uintp2() 
Fixes: runtime error: shift exponent 4294967289 is too large for 32-bit type 'int'
Fixes: 3030/clusterfuzz-testcase-minimized-4649809254285312

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
 2017-08-20 21:14:47 +02:00
Michael Niedermayer
cadab5a2a7 avcodec/pixlet: fixes integer overflow in read_highpass() 
Fixes: runtime error: negation of -2147483648 cannot be represented in type 'int32_t' (aka 'int'); cast to an unsigned type to negate this value to itself
Fixes: 2879/clusterfuzz-testcase-minimized-6317542639403008

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
 2017-08-18 11:34:01 +02:00
Michael Niedermayer
aeddb3607b avcodec/pixlet: Simplify nbits computation 
Fixes multiple integer overflows
Fixes: runtime error: signed integer overflow: 1 + 2147483647 cannot be represented in type 'int'

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>
 2017-07-28 03:35:22 +02:00
Michael Niedermayer
77d9889821 avcodec/pixlet: Fix runtime error: signed integer overflow: 2147483647 + 32 cannot be represented in type 'int' 
Fixes: 1829/clusterfuzz-testcase-minimized-5527165321871360

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
 2017-05-27 13:04:23 +02:00
Michael Niedermayer
d32ebce8fd avcodec/pixlet: Fix reading invalid numbers of bits 
Fixes: asertion failure
Fixes: 1664/clusterfuzz-testcase-minimized-6587801187385344

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/targets/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
 2017-05-18 18:08:23 +02:00
Michael Niedermayer
a453f5549a avcodec/pixlet: Fixes: runtime error: signed integer overflow: 9203954323419769657 + 29897660706736950 cannot be represented in type 'long' 
Fixes: 1569/clusterfuzz-testcase-minimized-6328690508038144

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/targets/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
 2017-05-14 17:03:30 +02:00
Michael Niedermayer
60765cc42e avcodec/pixlet: Fix runtime error: signed integer overflow: 436207616 * -5160230545260541 cannot be represented in type 'long' 
Fixes: 1462/clusterfuzz-testcase-minimized-6558894463647744

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/targets/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
 2017-05-11 00:02:41 +02:00
Michael Niedermayer
1f5b6c7e1e avcodec/pixlet: Fix shift exponent 4294967268 is too large for 32-bit type 'int' 
Fixes: 1336/clusterfuzz-testcase-minimized-4761381930795008

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/targets/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
 2017-05-05 13:36:52 +02:00
Michael Niedermayer
c94d551ea7 avcodec/pixlet: Reorder rlen check 
This changes nothing but is nicer looking as this checks rlen

Maybe this helps coverity remove CID1397743

Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
 2017-04-10 13:11:15 +02:00
Clément Bœsch
549045254c Fix all -Wformat warnings raised by DJGPP 2017-03-29 14:49:29 +02:00
Vittorio Giovara
a6b1180e39 avcodec/pixlet: fix architecture-dependent code and values 
The constants used in the decoder used floating point precision,
and this caused different values to be generated on different
architectures.

So, eradicate floating point numbers and use fixed point (32.32)
arithmetics everywhere, replacing constants with precomputed integer
values.

Signed-off-by: Vittorio Giovara <vittorio.giovara at gmail.com>
Signed-off-by: Paul B Mahol <onemda@gmail.com>
 2017-03-07 14:04:01 +01:00
Paul B Mahol
0fe50e56e9 avcodec/pixlet: use av_clip_uintp2_c explicitly 
Found-by: Clément Bœsch <u@pkh.me>
Signed-off-by: Paul B Mahol <onemda@gmail.com>
 2017-01-19 13:32:21 +01:00
Paul B Mahol
a340987e37 avcodec/pixlet: use av_clip_uintp2() 
Found-by: Clément Bœsch <u@pkh.me>
Signed-off-by: Paul B Mahol <onemda@gmail.com>
 2017-01-19 13:19:10 +01:00
Paul B Mahol
be46eb7101 avcodec/pixlet: clip chroma before shifting 
Fixes artifacts.

Signed-off-by: Paul B Mahol <onemda@gmail.com>
 2017-01-19 12:49:41 +01:00
Paul B Mahol
25c4035529 avcodec/pixlet: simplify lowpass_prediction() function 
Signed-off-by: Paul B Mahol <onemda@gmail.com>
 2016-12-24 16:42:00 +01:00
Paul B Mahol
6cedd20b97 avcodec/pixlet: make sure scaling factors are not zero 
Signed-off-by: Paul B Mahol <onemda@gmail.com>
 2016-12-24 10:31:43 +01:00
Paul B Mahol
ab31b46b89 avcodec/pixlet: avoid some overflows 
Signed-off-by: Paul B Mahol <onemda@gmail.com>
 2016-12-24 10:26:27 +01:00
Paul B Mahol
43cd33be16 avcodec/pixlet: fix undefined behaviour in postprocess_chroma 
Signed-off-by: Paul B Mahol <onemda@gmail.com>
 2016-12-24 10:22:39 +01:00
Paul B Mahol
51ed1a7dd4 avcodec/pixlet: check out of bounds pfx value 
Signed-off-by: Paul B Mahol <onemda@gmail.com>
 2016-12-23 09:41:06 +01:00
James Almer
41de965e31 avcodec/pixlet: remove unnecessary double to float conversion 
Signed-off-by: James Almer <jamrial@gmail.com>
 2016-12-23 09:19:34 +01:00
Paul B Mahol
73651090ca avcodec: add Apple Pixlet decoder 
Signed-off-by: Paul B Mahol <onemda@gmail.com>
 2016-12-22 22:47:06 +01:00