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7 Commits

Author SHA1 Message Date
Andreas Rheinhardt
691f9cd428 avcodec/apv_dsp: Reindent after previous commit 
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
 2026-03-14 19:31:45 +01:00
Andreas Rheinhardt
59b119023f avcodec/apv_dsp: Remove dead 8 bit code 
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
 2026-03-14 19:31:45 +01:00
Andreas Rheinhardt
ba94177242 avcodec/x86/Makefile: Only compile ASM init files when X86ASM is enabled 
To do so, simply add these init files to X86ASM-OBJS instead of OBJS
in the Makefile. The former is already used for the actual assembly
files, but using them for the C init files just works, because the build
system uses file extensions to derive whether it is a C or a NASM file.

This avoids compiling unused function stubs and also reduces our
reliance on DCE: We don't add %if checks to the asm files except
for AVX, AVX2, FMA3, FMA4, XOP and AVX512, so all the MMX-SSE4
functions will be available. It also allows to remove HAVE_X86ASM checks
in these init files.

Reviewed-by: Kacper Michajłow <kasper93@gmail.com>
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
 2025-11-30 22:20:13 +01:00
Michael Niedermayer
b2858d462d avcodec/apv_dsp: Avoid UB overflow in dequant 
Fixes: signed integer overflow: 33632416 * 64 cannot be represented in type 'int'
Fixes: 421817631/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_APV_fuzzer-4957386534354944

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
 2025-07-06 19:20:24 +02:00
Andreas Rheinhardt
0b588bfb51 avcodec/apv_dsp: Fix left-shift of negative value 
Reviewed-by: Mark Thompson <sw@jkqxz.net>
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
 2025-04-30 23:38:21 +02:00
Mark Thompson
d03c99441d lavc/apv: AVX2 transquant for x86-64 
Typical checkasm result on Alder Lake:

decode_transquant_8_c:                                 464.2 ( 1.00x)
decode_transquant_8_avx2:                               86.2 ( 5.38x)
decode_transquant_10_c:                                481.6 ( 1.00x)
decode_transquant_10_avx2:                              83.5 ( 5.77x)
 2025-04-27 15:52:30 +01:00
Mark Thompson
483cadf8d7 lavc: APV decoder 2025-04-27 15:52:30 +01:00