mirror of
https://github.com/FFmpeg/FFmpeg.git
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140 lines
3.7 KiB
C
140 lines
3.7 KiB
C
/*
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* Copyright 2005 Balatoni Denes
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* Copyright 2006 Loren Merritt
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*
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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 "float_dsp.h"
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static void vector_fmul_c(float *dst, const float *src0, const float *src1,
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int len)
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{
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int i;
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for (i = 0; i < len; i++)
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dst[i] = src0[i] * src1[i];
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}
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static void vector_fmac_scalar_c(float *dst, const float *src, float mul,
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int len)
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{
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int i;
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for (i = 0; i < len; i++)
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dst[i] += src[i] * mul;
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}
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static void vector_fmul_scalar_c(float *dst, const float *src, float mul,
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int len)
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{
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int i;
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for (i = 0; i < len; i++)
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dst[i] = src[i] * mul;
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}
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static void vector_dmul_scalar_c(double *dst, const double *src, double mul,
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int len)
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{
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int i;
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for (i = 0; i < len; i++)
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dst[i] = src[i] * mul;
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}
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static void vector_fmul_window_c(float *dst, const float *src0,
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const float *src1, const float *win, int len)
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{
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int i, j;
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dst += len;
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win += len;
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src0 += len;
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for (i = -len, j = len - 1; i < 0; i++, j--) {
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float s0 = src0[i];
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float s1 = src1[j];
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float wi = win[i];
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float wj = win[j];
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dst[i] = s0 * wj - s1 * wi;
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dst[j] = s0 * wi + s1 * wj;
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}
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}
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static void vector_fmul_add_c(float *dst, const float *src0, const float *src1,
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const float *src2, int len){
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int i;
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for (i = 0; i < len; i++)
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dst[i] = src0[i] * src1[i] + src2[i];
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}
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static void vector_fmul_reverse_c(float *dst, const float *src0,
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const float *src1, int len)
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{
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int i;
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src1 += len-1;
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for (i = 0; i < len; i++)
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dst[i] = src0[i] * src1[-i];
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}
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static void butterflies_float_c(float *av_restrict v1, float *av_restrict v2,
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int len)
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{
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int i;
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for (i = 0; i < len; i++) {
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float t = v1[i] - v2[i];
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v1[i] += v2[i];
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v2[i] = t;
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}
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}
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float avpriv_scalarproduct_float_c(const float *v1, const float *v2, int len)
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{
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float p = 0.0;
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int i;
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for (i = 0; i < len; i++)
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p += v1[i] * v2[i];
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return p;
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}
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void avpriv_float_dsp_init(AVFloatDSPContext *fdsp, int bit_exact)
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{
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fdsp->vector_fmul = vector_fmul_c;
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fdsp->vector_fmac_scalar = vector_fmac_scalar_c;
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fdsp->vector_fmul_scalar = vector_fmul_scalar_c;
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fdsp->vector_dmul_scalar = vector_dmul_scalar_c;
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fdsp->vector_fmul_window = vector_fmul_window_c;
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fdsp->vector_fmul_add = vector_fmul_add_c;
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fdsp->vector_fmul_reverse = vector_fmul_reverse_c;
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fdsp->butterflies_float = butterflies_float_c;
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fdsp->scalarproduct_float = avpriv_scalarproduct_float_c;
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#if ARCH_ARM
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ff_float_dsp_init_arm(fdsp);
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#elif ARCH_PPC
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ff_float_dsp_init_ppc(fdsp, bit_exact);
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#elif ARCH_X86
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ff_float_dsp_init_x86(fdsp);
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#elif ARCH_MIPS
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ff_float_dsp_init_mips(fdsp);
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#endif
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}
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