FFmpeg

Commit Graph

Author	SHA1	Message	Date
Lynne	469cd8d7fa	aacdec: convert to lavu/tx and support fixed-point 960-sample decoding This patch replaces the transform used in AAC with lavu/tx and removes the limitation on only being able to decode 960-sample files with the float decoder. This commit also removes a whole bunch of unnecessary and slow lifting steps the decoder did to compensate for the poor accuracy of the old integer transformation code. Overall float decoder speedup on Zen 3 for 64kbps: 32%	2 years ago
Andreas Rheinhardt	211619ad7f	avcodec: Remove the FFT_FIXED_32 define Since the removal of the 16-bit FFT said define is unnecessary as FFT_FIXED_32 is always !FFT_FLOAT. But one wouldn't believe it when looking at the code. Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>	3 years ago
Andreas Rheinhardt	698a4b22d0	avcodec/aacdec_fixed: Move fixed-point sinewin tables to its only user The fixed-point AAC decoder is the only user of the fixed-point sinewin tables from sinewin; and it only uses a few of them (about 10% when counting by size). This means that guarding initializing these tables by an AVOnce (as done in `3719122065`) is unnecessary for them. Furthermore the array of pointers to the individual arrays is also unneeded. Therefore this commit moves these tables directly into aacdec_fixed.c; this is done by ridding the original sinewin.h and sinewin_tablegen.h headers completely of any fixed-point code at the cost of a bit of duplicated code (the alternative is an ugly ifdef-mess). This saves about 58KB from the binary when using hardcoded tables (as these tables are hardcoded in this scenario); when not using hardcoded tables, most of these savings only affect the .bss segment, but the rest (< 1KB) contains relocations (i.e. savings in .data.rel.ro). Reviewed-by: Lynne <dev@lynne.ee> Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@gmail.com>	4 years ago
Andreas Rheinhardt	fc5d22abe4	avcodec/aacdec, aactab: Move kbd tables to their only user The floating point kbd tables for 120 and 960 samples are only used by the floating point decoder whereas the fixed point kbd tables for 128 and 1024 samples are only used by the fixed point AAC decoder. So move these tables to their only users. This ensures that they are not accidentally used somewhere else without ensuring that initializing these tables stays thread-safe (as it is now because the only place from where they are initialized is guarded by an AVOnce). Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@gmail.com>	4 years ago
Michael Niedermayer	0ef8f03133	avcodec/aacdec_template: Fix undefined integer overflow in apply_tns() Fixes: runtime error: signed integer overflow: -2147483648 - 1202286525 cannot be represented in type 'int' Fixes: 2071/clusterfuzz-testcase-minimized-6036414271586304 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>	7 years ago
Michael Niedermayer	872bac8159	avcodec/aac_defines: Add missing () to AAC_HALF_SUM() macro Fixes: runtime error: shift exponent 1073741848 is too large for 32-bit type 'INTFLOAT' (aka 'int') Fixes: 1880/clusterfuzz-testcase-minimized-4900645322620928 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>	8 years ago
Michael Niedermayer	c3547dcbc3	avcodec/aac_defines: Fix: runtime error: left shift of negative value -2 Fixes: 1716/clusterfuzz-testcase-minimized-4691012196761600 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>	8 years ago
Marton Balint	67bef4cffa	avcodec/aactab: do not use floats for constants This may improve the precision of the fixed point encoder/decoder for some compilers and architectures. Reviewed-by: Michael Niedermayer <michael@niedermayer.cc> Signed-off-by: Marton Balint <cus@passwd.hu>	9 years ago
Ganesh Ajjanagadde	5472de5ca8	avcodec/aac_defines: replace #define by typedef See e.g https://stackoverflow.com/questions/1666353/are-typedef-and-define-the-same-in-c for rationale. Signed-off-by: Ganesh Ajjanagadde <gajjanagadde@gmail.com>	9 years ago
Djordje Pesut	5fd81cf6f0	avcodec: Implementation of AAC_fixed_decoder (PS-module) Add fixed point implementation. Signed-off-by: Nedeljko Babic <nedeljko.babic@imgtec.com> Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>	9 years ago
Djordje Pesut	f85bc147fb	avcodec: Implementation of AAC_fixed_decoder (SBR-module) Add fixed poind code. Signed-off-by: Nedeljko Babic <nedeljko.babic@imgtec.com> Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>	9 years ago

11 Commits (ea49c83badf5ad43793813c426d2049f38d5bf65)