rematrix_template.c 3.9 KB

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  1. /*
  2. * Copyright (C) 2011-2012 Michael Niedermayer (michaelni@gmx.at)
  3. *
  4. * This file is part of libswresample
  5. *
  6. * libswresample is free software; you can redistribute it and/or
  7. * modify it under the terms of the GNU Lesser General Public
  8. * License as published by the Free Software Foundation; either
  9. * version 2.1 of the License, or (at your option) any later version.
  10. *
  11. * libswresample is distributed in the hope that it will be useful,
  12. * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13. * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  14. * Lesser General Public License for more details.
  15. *
  16. * You should have received a copy of the GNU Lesser General Public
  17. * License along with libswresample; if not, write to the Free Software
  18. * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  19. */
  20. #if defined(TEMPLATE_REMATRIX_FLT)
  21. # define R(x) x
  22. # define SAMPLE float
  23. # define COEFF float
  24. # define INTER float
  25. # define RENAME(x) x ## _float
  26. #elif defined(TEMPLATE_REMATRIX_DBL)
  27. # define R(x) x
  28. # define SAMPLE double
  29. # define COEFF double
  30. # define INTER double
  31. # define RENAME(x) x ## _double
  32. #elif defined(TEMPLATE_REMATRIX_S16)
  33. # define SAMPLE int16_t
  34. # define COEFF int
  35. # define INTER int
  36. # ifdef TEMPLATE_CLIP
  37. # define R(x) av_clip_int16(((x) + 16384)>>15)
  38. # define RENAME(x) x ## _clip_s16
  39. # else
  40. # define R(x) (((x) + 16384)>>15)
  41. # define RENAME(x) x ## _s16
  42. # endif
  43. #elif defined(TEMPLATE_REMATRIX_S32)
  44. # define R(x) (((x) + 16384)>>15)
  45. # define SAMPLE int32_t
  46. # define COEFF int
  47. # define INTER int64_t
  48. # define RENAME(x) x ## _s32
  49. #endif
  50. typedef void (RENAME(mix_any_func_type))(SAMPLE **out, const SAMPLE **in1, COEFF *coeffp, integer len);
  51. static void RENAME(sum2)(SAMPLE *out, const SAMPLE *in1, const SAMPLE *in2, COEFF *coeffp, integer index1, integer index2, integer len){
  52. int i;
  53. INTER coeff1 = coeffp[index1];
  54. INTER coeff2 = coeffp[index2];
  55. for(i=0; i<len; i++)
  56. out[i] = R(coeff1*in1[i] + coeff2*in2[i]);
  57. }
  58. static void RENAME(copy)(SAMPLE *out, const SAMPLE *in, COEFF *coeffp, integer index, integer len){
  59. int i;
  60. INTER coeff = coeffp[index];
  61. for(i=0; i<len; i++)
  62. out[i] = R(coeff*in[i]);
  63. }
  64. static void RENAME(mix6to2)(SAMPLE **out, const SAMPLE **in, COEFF *coeffp, integer len){
  65. int i;
  66. for(i=0; i<len; i++) {
  67. INTER t = in[2][i]*(INTER)coeffp[0*6+2] + in[3][i]*(INTER)coeffp[0*6+3];
  68. out[0][i] = R(t + in[0][i]*(INTER)coeffp[0*6+0] + in[4][i]*(INTER)coeffp[0*6+4]);
  69. out[1][i] = R(t + in[1][i]*(INTER)coeffp[1*6+1] + in[5][i]*(INTER)coeffp[1*6+5]);
  70. }
  71. }
  72. static void RENAME(mix8to2)(SAMPLE **out, const SAMPLE **in, COEFF *coeffp, integer len){
  73. int i;
  74. for(i=0; i<len; i++) {
  75. INTER t = in[2][i]*(INTER)coeffp[0*8+2] + in[3][i]*(INTER)coeffp[0*8+3];
  76. out[0][i] = R(t + in[0][i]*(INTER)coeffp[0*8+0] + in[4][i]*(INTER)coeffp[0*8+4] + in[6][i]*(INTER)coeffp[0*8+6]);
  77. out[1][i] = R(t + in[1][i]*(INTER)coeffp[1*8+1] + in[5][i]*(INTER)coeffp[1*8+5] + in[7][i]*(INTER)coeffp[1*8+7]);
  78. }
  79. }
  80. static RENAME(mix_any_func_type) *RENAME(get_mix_any_func)(SwrContext *s){
  81. if( s->out_ch_layout == AV_CH_LAYOUT_STEREO && (s->in_ch_layout == AV_CH_LAYOUT_5POINT1 || s->in_ch_layout == AV_CH_LAYOUT_5POINT1_BACK)
  82. && s->matrix[0][2] == s->matrix[1][2] && s->matrix[0][3] == s->matrix[1][3]
  83. && !s->matrix[0][1] && !s->matrix[0][5] && !s->matrix[1][0] && !s->matrix[1][4]
  84. )
  85. return RENAME(mix6to2);
  86. if( s->out_ch_layout == AV_CH_LAYOUT_STEREO && s->in_ch_layout == AV_CH_LAYOUT_7POINT1
  87. && s->matrix[0][2] == s->matrix[1][2] && s->matrix[0][3] == s->matrix[1][3]
  88. && !s->matrix[0][1] && !s->matrix[0][5] && !s->matrix[1][0] && !s->matrix[1][4]
  89. && !s->matrix[0][7] && !s->matrix[1][6]
  90. )
  91. return RENAME(mix8to2);
  92. return NULL;
  93. }
  94. #undef R
  95. #undef SAMPLE
  96. #undef COEFF
  97. #undef INTER
  98. #undef RENAME