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17 Commits

Author SHA1 Message Date
Michael Niedermayer
fc7c379060 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>
(cherry picked from commit d32ebce8fd79bb859ba4a04c92470a052f2aafa6)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
 2017-06-02 01:14:38 +02:00
Michael Niedermayer
9b33462dc4 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>
(cherry picked from commit 1f5b6c7e1ee604b1525b3ab84ea6e8817fe66f36)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
 2017-05-14 17:56:21 +02:00
Michael Niedermayer
611ef6381b 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>
(cherry picked from commit a453f5549a8c3f8307200b32d3b342f0b4af3153)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
 2017-05-14 17:56:20 +02:00
Michael Niedermayer
4a974cb595 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>
(cherry picked from commit 60765cc42e3eb4a1193ef352a89946113a6e5802)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
 2017-05-14 00:21:49 +02:00
Michael Niedermayer
c30d0ace65 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>
(cherry picked from commit c94d551ea7b39c4e467e146cd347c407e8eb38ee)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
 2017-04-11 23:39:21 +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