FFmpeg

Commit Graph

Author	SHA1	Message	Date
Rémi Denis-Courmont	06fc919aad	lavc/sbrdsp: add support for 256-bit vectors hf_apply_noise_0_c: 35.7 hf_apply_noise_0_rvv_f32: 9.5 hf_apply_noise_1_c: 38.5 hf_apply_noise_1_rvv_f32: 10.0 hf_apply_noise_2_c: 35.5 hf_apply_noise_2_rvv_f32: 9.7 hf_apply_noise_3_c: 38.5 hf_apply_noise_3_rvv_f32: 10.0 Maybe extending the noise table manually is not such great idea, but I not quite sure how to deal with that otherwise? Allocating the table dynamically is possible but would require an ELF destructor to clean up.	8 months ago
Rémi Denis-Courmont	e6b38c944f	lavc/sbrdsp: fix potential overflow in noise table Since the SBR noise application optimisations are currently restricted to hardware with 128-bit vectors, and use a quadruple multipler, they can load up to 16 32-bit elements. But the "loads" are of 2 segments, or 16 pairs of single precision float. Thus we need to expand the dupiclated section of the noise table from 2x8 to 2x16 to avoid overflows.	8 months ago
Lynne	03cf101645	aacdec: remove AAC-specific MIPS optimizations The code was written in 2012, but seems to have been broken for just as long. Compilation is broken on every MIPS/MIPS64 system with an FPU (which the code depends on).	9 months ago
Andreas Rheinhardt	a6aa043baa	avcodec/aac: Split ChannelElement in decoder and encoder structs The AAC decoders share no common code with the AAC encoder, so they are not restricted to using the same structures. This implies that one can use different structs for each component and remove elements not used by the decoders/ the encoder. This leads to quite sizeable savings: sizeof(ChannelElement) for the encoder went down to 134432B here from 547552B; for the decoder it went down to 512800B. Reviewed-by: Lynne <dev@lynne.ee> Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>	11 months ago
Rémi Denis-Courmont	86bee42473	lavc/sbrdsp: R-V V sum64x5 sum64x5_c: 385.0 sum64x5_rvv_f32: 116.0	1 year ago
Andreas Rheinhardt	533ebe755a	avcodec/aacsbrdata: Move ff_sbr_noise_table to sbrdsp_template.c ff_sbr_noise_table is only used by SBR DSP code and sbrdsp.h is the header providing its declaration. Furthermore, this ensures that checkasm does not pull the whole AAC SBR and PS code in. Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>	1 year 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
Matthieu Bouron	0a24d7ca83	lavc/aarch64: add sbrdsp neon implementation autocorrelate_c: 644.0 autocorrelate_neon: 420.0 hf_apply_noise_0_c: 1688.5 hf_apply_noise_0_neon: 1498.6 hf_apply_noise_1_c: 1691.2 hf_apply_noise_1_neon: 1500.6 hf_apply_noise_2_c: 1688.1 hf_apply_noise_2_neon: 1500.3 hf_apply_noise_3_c: 1696.6 hf_apply_noise_3_neon: 1502.2 hf_g_filt_c: 2117.8 hf_g_filt_neon: 1218.7 hf_gen_c: 4573.4 hf_gen_neon: 2461.0 neg_odd_64_c: 72.0 neg_odd_64_neon: 64.7 qmf_deint_bfly_c: 1107.6 qmf_deint_bfly_neon: 291.6 qmf_deint_neg_c: 210.4 qmf_deint_neg_neon: 107.4 qmf_post_shuffle_c: 163.0 qmf_post_shuffle_neon: 107.7 qmf_pre_shuffle_c: 120.5 qmf_pre_shuffle_neon: 110.7 sum64x5_c: 1361.6 sum64x5_neon: 435.4 sum_square_c: 1686.4 sum_square_neon: 787.2	8 years ago
Michael Niedermayer	7c36ee216f	avcodec/sbrdsp_template: Fix: runtime error: signed integer overflow: 849815297 + 1315389781 cannot be represented in type 'int' Fixes: 1770/clusterfuzz-testcase-minimized-5285511235108864 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
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>	10 years ago
Djordje Pesut	5499467d5d	avcodec: Template creation for AAC decoder (SBR-module) Move the existing code to a new template file. Signed-off-by: Nedeljko Babic <nedeljko.babic@imgtec.com> Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>	10 years ago

11 Commits (e7d6300c10834b782a2e2b274d4a9f1fc4cf8efe)