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rematrix_template.c
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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 
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