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${ noResults }
7 Commits (13129f1af4340944291e0e291cb38d1c1ea3aad2)
| Author | SHA1 | Message | Date |
|---|---|---|---|
Rémi Denis-Courmont
|
64ab577954 |
lavc/alacdsp: RISC-V V decorrelate_stereo
To avoid data dependencies, this does the following unroll, which
requires one extra but probably free addition:
coeff = (b * left_weight) >> decorr_shift;
b += a;
a -= coeff;
b -= coeff;
swap(a, b);
|
2 years ago |
Michael Niedermayer
|
8709f4c10a |
avcodec/alacdsp: Make intermediates unsigned
Fixes: signed integer overflow: -14914387 + -2147418648 cannot be represented in type 'int' Fixes: 46464/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_ALAC_fuzzer-474307197311385 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer <michael@niedermayer.cc> |
2 years ago |
Andreas Rheinhardt
|
40e6575aa3 |
all: Replace if (ARCH_FOO) checks by #if ARCH_FOO
This is more spec-compliant because it does not rely on dead-code elimination by the compiler. Especially MSVC has problems with this, as can be seen in https://ffmpeg.org/pipermail/ffmpeg-devel/2022-May/296373.html or https://ffmpeg.org/pipermail/ffmpeg-devel/2022-May/297022.html This commit does not eliminate every instance where we rely on dead code elimination: It only tackles branching to the initialization of arch-specific dsp code, not e.g. all uses of CONFIG_ and HAVE_ checks. But maybe it is already enough to compile FFmpeg with MSVC with whole-programm-optimizations enabled (if one does not disable too many components). Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com> |
2 years ago |
|
Michael Niedermayer
|
68457c1e85 |
avcodec/alacdsp: fix integer overflow in decorrelate_stereo()
Fixes: signed integer overflow: -16777216 * 131 cannot be represented in type 'int' Fixes: 23835/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_ALAC_fuzzer-5669943160078336 Fixes: 41101/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_ALAC_fuzzer-4636330705944576 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer <michael@niedermayer.cc> |
3 years ago |
|
Michael Niedermayer
|
49ae034b42 |
avcodec/alacdsp: Fix invalid shift in append_extra_bits()
Fixes: left shift of negative value -1 Fixes: 21390/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_ALAC_fuzzer-6242539519868928 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer <michael@niedermayer.cc> |
5 years ago |
James Almer
|
72254b19b8 |
x86/alacdsp: add simd optimized functions
Signed-off-by: James Almer <jamrial@gmail.com> |
9 years ago |
|
James Almer
|
b70566d6ca |
avcodec/alacdec: split off decorrelate_stereo and append_extra_bits as alacdsp
Reviewed-by: Michael Niedermayer <michaelni@gmx.at> Signed-off-by: James Almer <jamrial@gmail.com> |
9 years ago |