| /* |
| * 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 */ |