Chiebot-Mirror/FFmpeg - FFmpeg - Gitea: Git with a cup of tea

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>	3 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>	3 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