ffmpeg/libswresample/rematrix_template.c

   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
  21 #if defined(TEMPLATE_REMATRIX_FLT)
  22 #    define R(x) x
  23 #    define SAMPLE float
  24 #    define COEFF float
  25 #    define INTER float
  26 #    define RENAME(x) x ## _float
  27 #elif defined(TEMPLATE_REMATRIX_DBL)
  28 #    define R(x) x
  29 #    define SAMPLE double
  30 #    define COEFF double
  31 #    define INTER double
  32 #    define RENAME(x) x ## _double
  33 #elif defined(TEMPLATE_REMATRIX_S16)
  34 #    define R(x) (((x) + 16384)>>15)
  35 #    define SAMPLE int16_t
  36 #    define COEFF int
  37 #    define INTER int
  38 #    define RENAME(x) x ## _s16
  39 #elif defined(TEMPLATE_REMATRIX_S32)
  40 #    define R(x) (((x) + 16384)>>15)
  41 #    define SAMPLE int32_t
  42 #    define COEFF int
  43 #    define INTER int64_t
  44 #    define RENAME(x) x ## _s32
  45 #endif
  46
  47 typedef void (RENAME(mix_any_func_type))(SAMPLE **out, const SAMPLE **in1, COEFF *coeffp, integer len);
  48
  49 static void RENAME(sum2)(SAMPLE *out, const SAMPLE *in1, const SAMPLE *in2, COEFF *coeffp, integer index1, integer index2, integer len){
  50     int i;
  51     INTER coeff1 = coeffp[index1];
  52     INTER coeff2 = coeffp[index2];
  53
  54     for(i=0; i<len; i++)
  55         out[i] = R(coeff1*in1[i] + coeff2*in2[i]);
  56 }
  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
  65 static void RENAME(mix6to2)(SAMPLE **out, const SAMPLE **in, COEFF *coeffp, integer len){
  66     int i;
  67
  68     for(i=0; i<len; i++) {
  69         INTER t = in[2][i]*(INTER)coeffp[0*6+2] + in[3][i]*(INTER)coeffp[0*6+3];
  70         out[0][i] = R(t + in[0][i]*(INTER)coeffp[0*6+0] + in[4][i]*(INTER)coeffp[0*6+4]);
  71         out[1][i] = R(t + in[1][i]*(INTER)coeffp[1*6+1] + in[5][i]*(INTER)coeffp[1*6+5]);
  72     }
  73 }
  74
  75 static void RENAME(mix8to2)(SAMPLE **out, const SAMPLE **in, COEFF *coeffp, integer len){
  76     int i;
  77
  78     for(i=0; i<len; i++) {
  79         INTER t = in[2][i]*(INTER)coeffp[0*8+2] + in[3][i]*(INTER)coeffp[0*8+3];
  80         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]);
  81         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]);
  82     }
  83 }
  84
  85 static RENAME(mix_any_func_type) *RENAME(get_mix_any_func)(SwrContext *s){
  86     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)
  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     )
  90         return RENAME(mix6to2);
  91
  92     if(   s->out_ch_layout == AV_CH_LAYOUT_STEREO && s->in_ch_layout == AV_CH_LAYOUT_7POINT1
  93        && s->matrix[0][2] == s->matrix[1][2] && s->matrix[0][3] == s->matrix[1][3]
  94        && !s->matrix[0][1] && !s->matrix[0][5] && !s->matrix[1][0] && !s->matrix[1][4]
  95        && !s->matrix[0][7] && !s->matrix[1][6]
  96     )
  97         return RENAME(mix8to2);
  98
  99     return NULL;
 100 }
 101
 102 #undef R
 103 #undef SAMPLE
 104 #undef COEFF
 105 #undef INTER
 106 #undef RENAME