forked from FFmpeg/FFmpeg
83e4b068d9
This patch supplies handwritten NEON code for AAC. The benchmarks below were collected by invoking these two commands on each of my boards, A78, A72 and Thinkpad x13s: 1) ./tests/checkasm/checkasm --test=aacencdsp --bench --runs=12 2) ./ffmpeg -y -t 10:00 -f lavfi -i sine /tmp/foo.aac (the first line is speed without the patch, second, with) - A78 abs_pow34_c: 4161.5 ( 1.00x) abs_pow34_neon: 3586.2 ( 1.16x) quant_bands_signed_c: 5548.0 ( 1.00x) quant_bands_signed_neon: 1126.8 ( 4.92x) quant_bands_unsigned_c: 3979.2 ( 1.00x) quant_bands_unsigned_neon: 800.2 ( 4.97x) size= 5251KiB time=00:10:00.00 bitrate= 71.7kbits/s speed=71.6x size= 5251KiB time=00:10:00.00 bitrate= 71.7kbits/s speed=82.3x - A72 abs_pow34_c: 15362.2 ( 1.00x) abs_pow34_neon: 15382.5 ( 1.00x) quant_bands_signed_c: 9926.5 ( 1.00x) quant_bands_signed_neon: 2467.8 ( 4.02x) quant_bands_unsigned_c: 5469.8 ( 1.00x) quant_bands_unsigned_neon: 2089.5 ( 2.62x) size= 5251KiB time=00:10:00.00 bitrate= 71.7kbits/s speed=34.3x size= 5251KiB time=00:10:00.00 bitrate= 71.7kbits/s speed=37.8 - x13s abs_pow34_c: 2413.4 ( 1.00x) abs_pow34_neon: 1796.2 ( 1.34x) quant_bands_signed_c: 2968.9 ( 1.00x) quant_bands_signed_neon: 675.6 ( 4.39x) quant_bands_unsigned_c: 2311.9 ( 1.00x) quant_bands_unsigned_neon: 477.1 ( 4.85x) size= 5251KiB time=00:10:00.00 bitrate= 71.7kbits/s speed= 135x size= 5251KiB time=00:10:00.00 bitrate= 71.7kbits/s speed= 159x Signed-off-by: Martin Storsjö <martin@martin.st>
75 lines
2.3 KiB
C
75 lines
2.3 KiB
C
/*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifndef AVCODEC_AACENCDSP_H
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#define AVCODEC_AACENCDSP_H
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#include <math.h>
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#include "config.h"
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#include "libavutil/macros.h"
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typedef struct AACEncDSPContext {
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void (*abs_pow34)(float *out, const float *in, const int size);
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void (*quant_bands)(int *out, const float *in, const float *scaled,
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int size, int is_signed, int maxval, const float Q34,
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const float rounding);
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} AACEncDSPContext;
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void ff_aacenc_dsp_init_riscv(AACEncDSPContext *s);
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void ff_aacenc_dsp_init_x86(AACEncDSPContext *s);
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void ff_aacenc_dsp_init_aarch64(AACEncDSPContext *s);
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static inline void abs_pow34_v(float *out, const float *in, const int size)
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{
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for (int i = 0; i < size; i++) {
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float a = fabsf(in[i]);
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out[i] = sqrtf(a * sqrtf(a));
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}
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}
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static inline void quantize_bands(int *out, const float *in, const float *scaled,
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int size, int is_signed, int maxval, const float Q34,
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const float rounding)
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{
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for (int i = 0; i < size; i++) {
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float qc = scaled[i] * Q34;
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int tmp = (int)FFMIN(qc + rounding, (float)maxval);
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if (is_signed && in[i] < 0.0f) {
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tmp = -tmp;
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}
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out[i] = tmp;
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}
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}
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static inline void ff_aacenc_dsp_init(AACEncDSPContext *s)
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{
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s->abs_pow34 = abs_pow34_v;
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s->quant_bands = quantize_bands;
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#if ARCH_RISCV
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ff_aacenc_dsp_init_riscv(s);
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#elif ARCH_X86
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ff_aacenc_dsp_init_x86(s);
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#elif ARCH_AARCH64
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ff_aacenc_dsp_init_aarch64(s);
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#endif
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}
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#endif
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