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/*
* Copyright (c) 2017 Paul B Mahol
*
* 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
*/
#ifndef AVFILTER_AFIRDSP_H
#define AVFILTER_AFIRDSP_H
#include <stddef.h>
#include "config.h"
#include "libavutil/attributes.h"
typedef struct AudioFIRDSPContext {
void (*fcmul_add)(float *sum, const float *t, const float *c,
ptrdiff_t len);
void (*dcmul_add)(double *sum, const double *t, const double *c,
ptrdiff_t len);
} AudioFIRDSPContext;
void ff_afir_init_x86(AudioFIRDSPContext *s);
static void fcmul_add_c(float *sum, const float *t, const float *c, ptrdiff_t len)
{
int n;
for (n = 0; n < len; n++) {
const float cre = c[2 * n ];
const float cim = c[2 * n + 1];
const float tre = t[2 * n ];
const float tim = t[2 * n + 1];
sum[2 * n ] += tre * cre - tim * cim;
sum[2 * n + 1] += tre * cim + tim * cre;
}
sum[2 * n] += t[2 * n] * c[2 * n];
}
static void dcmul_add_c(double *sum, const double *t, const double *c, ptrdiff_t len)
{
int n;
for (n = 0; n < len; n++) {
const double cre = c[2 * n ];
const double cim = c[2 * n + 1];
const double tre = t[2 * n ];
const double tim = t[2 * n + 1];
sum[2 * n ] += tre * cre - tim * cim;
sum[2 * n + 1] += tre * cim + tim * cre;
}
sum[2 * n] += t[2 * n] * c[2 * n];
}
static av_unused void ff_afir_init(AudioFIRDSPContext *dsp)
{
dsp->fcmul_add = fcmul_add_c;
dsp->dcmul_add = dcmul_add_c;
#if ARCH_X86
ff_afir_init_x86(dsp);
#endif
}
#endif /* AVFILTER_AFIRDSP_H */
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