mirror of
https://git.ffmpeg.org/ffmpeg.git
synced 2024-12-11 09:35:22 +00:00
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
/*
|
|
* This file is part of FFmpeg.
|
|
*
|
|
* FFmpeg is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU Lesser General Public
|
|
* License as published by the Free Software Foundation; either
|
|
* version 2.1 of the License, or (at your option) any later version.
|
|
*
|
|
* FFmpeg is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
* Lesser General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Lesser General Public
|
|
* License along with FFmpeg; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
|
*/
|
|
|
|
#include "config.h"
|
|
#include "libavutil/attributes.h"
|
|
#include "vorbisdsp.h"
|
|
|
|
static void vorbis_inverse_coupling_c(float *mag, float *ang, ptrdiff_t blocksize)
|
|
{
|
|
for (ptrdiff_t i = 0; i < blocksize; i++) {
|
|
float angi = ang[i], magi = mag[i];
|
|
|
|
if (magi > 0.f) {
|
|
if (angi > 0.f) {
|
|
ang[i] = magi - angi;
|
|
} else {
|
|
ang[i] = magi;
|
|
mag[i] = magi + angi;
|
|
}
|
|
} else {
|
|
if (angi > 0.f) {
|
|
ang[i] = magi + angi;
|
|
} else {
|
|
ang[i] = magi;
|
|
mag[i] = magi - angi;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
av_cold void ff_vorbisdsp_init(VorbisDSPContext *dsp)
|
|
{
|
|
dsp->vorbis_inverse_coupling = vorbis_inverse_coupling_c;
|
|
|
|
#if ARCH_AARCH64
|
|
ff_vorbisdsp_init_aarch64(dsp);
|
|
#elif ARCH_ARM
|
|
ff_vorbisdsp_init_arm(dsp);
|
|
#elif ARCH_PPC
|
|
ff_vorbisdsp_init_ppc(dsp);
|
|
#elif ARCH_RISCV
|
|
ff_vorbisdsp_init_riscv(dsp);
|
|
#elif ARCH_X86
|
|
ff_vorbisdsp_init_x86(dsp);
|
|
#endif
|
|
}
|