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  1. /*
  2.  * Copyright 2005 Balatoni Denes
  3.  * Copyright 2006 Loren Merritt
  4.  *
  5.  * This file is part of FFmpeg.
  6.  *
  7.  * FFmpeg is free software; you can redistribute it and/or
  8.  * modify it under the terms of the GNU Lesser General Public
  9.  * License as published by the Free Software Foundation; either
  10.  * version 2.1 of the License, or (at your option) any later version.
  11.  *
  12.  * FFmpeg is distributed in the hope that it will be useful,
  13.  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14.  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15.  * Lesser General Public License for more details.
  16.  *
  17.  * You should have received a copy of the GNU Lesser General Public
  18.  * License along with FFmpeg; if not, write to the Free Software
  19.  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  20.  */
  21.  
  22. #include "config.h"
  23. #include "attributes.h"
  24. #include "float_dsp.h"
  25.  
  26. static void vector_fmul_c(float *dst, const float *src0, const float *src1,
  27.                           int len)
  28. {
  29.     int i;
  30.     for (i = 0; i < len; i++)
  31.         dst[i] = src0[i] * src1[i];
  32. }
  33.  
  34. static void vector_fmac_scalar_c(float *dst, const float *src, float mul,
  35.                                  int len)
  36. {
  37.     int i;
  38.     for (i = 0; i < len; i++)
  39.         dst[i] += src[i] * mul;
  40. }
  41.  
  42. static void vector_fmul_scalar_c(float *dst, const float *src, float mul,
  43.                                  int len)
  44. {
  45.     int i;
  46.     for (i = 0; i < len; i++)
  47.         dst[i] = src[i] * mul;
  48. }
  49.  
  50. static void vector_dmul_scalar_c(double *dst, const double *src, double mul,
  51.                                  int len)
  52. {
  53.     int i;
  54.     for (i = 0; i < len; i++)
  55.         dst[i] = src[i] * mul;
  56. }
  57.  
  58. static void vector_fmul_window_c(float *dst, const float *src0,
  59.                                  const float *src1, const float *win, int len)
  60. {
  61.     int i, j;
  62.  
  63.     dst  += len;
  64.     win  += len;
  65.     src0 += len;
  66.  
  67.     for (i = -len, j = len - 1; i < 0; i++, j--) {
  68.         float s0 = src0[i];
  69.         float s1 = src1[j];
  70.         float wi = win[i];
  71.         float wj = win[j];
  72.         dst[i] = s0 * wj - s1 * wi;
  73.         dst[j] = s0 * wi + s1 * wj;
  74.     }
  75. }
  76.  
  77. static void vector_fmul_add_c(float *dst, const float *src0, const float *src1,
  78.                               const float *src2, int len){
  79.     int i;
  80.  
  81.     for (i = 0; i < len; i++)
  82.         dst[i] = src0[i] * src1[i] + src2[i];
  83. }
  84.  
  85. static void vector_fmul_reverse_c(float *dst, const float *src0,
  86.                                   const float *src1, int len)
  87. {
  88.     int i;
  89.  
  90.     src1 += len-1;
  91.     for (i = 0; i < len; i++)
  92.         dst[i] = src0[i] * src1[-i];
  93. }
  94.  
  95. static void butterflies_float_c(float *av_restrict v1, float *av_restrict v2,
  96.                                 int len)
  97. {
  98.     int i;
  99.  
  100.     for (i = 0; i < len; i++) {
  101.         float t = v1[i] - v2[i];
  102.         v1[i] += v2[i];
  103.         v2[i] = t;
  104.     }
  105. }
  106.  
  107. float avpriv_scalarproduct_float_c(const float *v1, const float *v2, int len)
  108. {
  109.     float p = 0.0;
  110.     int i;
  111.  
  112.     for (i = 0; i < len; i++)
  113.         p += v1[i] * v2[i];
  114.  
  115.     return p;
  116. }
  117.  
  118. av_cold void avpriv_float_dsp_init(AVFloatDSPContext *fdsp, int bit_exact)
  119. {
  120.     fdsp->vector_fmul = vector_fmul_c;
  121.     fdsp->vector_fmac_scalar = vector_fmac_scalar_c;
  122.     fdsp->vector_fmul_scalar = vector_fmul_scalar_c;
  123.     fdsp->vector_dmul_scalar = vector_dmul_scalar_c;
  124.     fdsp->vector_fmul_window = vector_fmul_window_c;
  125.     fdsp->vector_fmul_add = vector_fmul_add_c;
  126.     fdsp->vector_fmul_reverse = vector_fmul_reverse_c;
  127.     fdsp->butterflies_float = butterflies_float_c;
  128.     fdsp->scalarproduct_float = avpriv_scalarproduct_float_c;
  129.  
  130. #if ARCH_ARM
  131.     ff_float_dsp_init_arm(fdsp);
  132. #elif ARCH_PPC
  133.     ff_float_dsp_init_ppc(fdsp, bit_exact);
  134. #elif ARCH_X86
  135.     ff_float_dsp_init_x86(fdsp);
  136. #elif ARCH_MIPS
  137.     ff_float_dsp_init_mips(fdsp);
  138. #endif
  139. }
  140.