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https://github.com/FFmpeg/FFmpeg.git
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453aba71e6
This uses the following vectorisation:
for (i = 0; i < blocksize; i++) {
ang[i] = mag[i] - copysignf(fmaxf(ang[i], 0.f), mag[i]);
mag[i] = mag[i] - copysignf(fminf(ang[i], 0.f), mag[i]);
}
62 lines
1.8 KiB
C
62 lines
1.8 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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#include "config.h"
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#include "libavutil/attributes.h"
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#include "vorbisdsp.h"
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static void vorbis_inverse_coupling_c(float *mag, float *ang, ptrdiff_t blocksize)
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{
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for (ptrdiff_t i = 0; i < blocksize; i++) {
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float angi = ang[i], magi = mag[i];
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if (magi > 0.f) {
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if (angi > 0.f) {
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ang[i] = magi - angi;
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} else {
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ang[i] = magi;
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mag[i] = magi + angi;
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}
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} else {
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if (angi > 0.f) {
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ang[i] = magi + angi;
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} else {
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ang[i] = magi;
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mag[i] = magi - angi;
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}
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}
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}
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}
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av_cold void ff_vorbisdsp_init(VorbisDSPContext *dsp)
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{
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dsp->vorbis_inverse_coupling = vorbis_inverse_coupling_c;
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#if ARCH_AARCH64
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ff_vorbisdsp_init_aarch64(dsp);
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#elif ARCH_ARM
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ff_vorbisdsp_init_arm(dsp);
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#elif ARCH_PPC
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ff_vorbisdsp_init_ppc(dsp);
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#elif ARCH_RISCV
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ff_vorbisdsp_init_riscv(dsp);
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#elif ARCH_X86
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ff_vorbisdsp_init_x86(dsp);
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#endif
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}
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