1 | //channels.c: |
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2 | |
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3 | /* |
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4 | * Copyright (C) Philipp 'ph3-der-loewe' Schafft - 2010 |
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5 | * |
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6 | * This file is part of libroardsp a part of RoarAudio, |
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7 | * a cross-platform sound system for both, home and professional use. |
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8 | * See README for details. |
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9 | * |
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10 | * This file is free software; you can redistribute it and/or modify |
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11 | * it under the terms of the GNU General Public License version 3 |
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12 | * as published by the Free Software Foundation. |
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13 | * |
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14 | * libroardsp is distributed in the hope that it will be useful, |
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15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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17 | * GNU General Public License for more details. |
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18 | * |
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19 | * You should have received a copy of the GNU General Public License |
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20 | * along with this software; see the file COPYING. If not, write to |
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21 | * the Free Software Foundation, 51 Franklin Street, Fifth Floor, |
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22 | * Boston, MA 02110-1301, USA. |
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23 | * |
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24 | */ |
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25 | |
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26 | #include "libroardsp.h" |
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27 | |
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28 | static struct { |
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29 | int id; |
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30 | char * name; |
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31 | char * sn; |
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32 | } _g_chans[] = { |
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33 | {ROARDSP_CHAN_NONE, "NONE", "NONE" }, |
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34 | {ROARDSP_CHAN_FRONT_LEFT, "FRONT_LEFT", "FL" }, |
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35 | {ROARDSP_CHAN_FRONT_RIGHT, "FRONT_RIGHT", "FR" }, |
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36 | {ROARDSP_CHAN_SIDE_LEFT, "SIDE_LEFT", "SL" }, |
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37 | {ROARDSP_CHAN_SIDE_RIGHT, "SIDE_RIGHT", "SR" }, |
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38 | {ROARDSP_CHAN_BACK_LEFT, "BACK_LEFT", "BL" }, |
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39 | {ROARDSP_CHAN_BACK_RIGHT, "BACK_RIGHT", "BR" }, |
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40 | {ROARDSP_CHAN_FRONT_CENTER, "FRONT_CENTER", "FC" }, |
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41 | {ROARDSP_CHAN_SIDE_CENTER, "SIDE_CENTER", "SC" }, |
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42 | {ROARDSP_CHAN_BACK_CENTER, "BACK_CENTER", "BC" }, |
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43 | {ROARDSP_CHAN_LEFT, "LEFT", "L" }, // alias |
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44 | {ROARDSP_CHAN_RIGHT, "RIGHT", "R" }, // alias |
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45 | {ROARDSP_CHAN_CENTER, "CENTER", "C" }, // alias |
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46 | {ROARDSP_CHAN_MONO, "MONO", "M" }, // alias |
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47 | {ROARDSP_CHAN_MS_MID, "MS_MID", "MID" }, |
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48 | {ROARDSP_CHAN_MS_SIDE, "MS_SIDE", "SIDE" }, |
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49 | {ROARDSP_CHAN_LFE, "LFE", "LFE" }, |
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50 | {ROARDSP_CHAN_EOL, NULL, NULL} |
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51 | }; |
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52 | |
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53 | char * roardsp_chan2str (int chan) { |
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54 | int i; |
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55 | |
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56 | for (i = 0; _g_chans[i].id != ROARDSP_CHAN_EOL; i++) |
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57 | if ( _g_chans[i].id == chan ) |
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58 | return _g_chans[i].name; |
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59 | |
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60 | return NULL; |
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61 | } |
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62 | |
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63 | int roardsp_str2chan(char * str) { |
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64 | int i; |
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65 | |
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66 | for (i = 0; _g_chans[i].id != ROARDSP_CHAN_EOL; i++) |
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67 | if ( !strcasecmp(_g_chans[i].name, str) || !strcasecmp(_g_chans[i].sn, str) ) |
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68 | return _g_chans[i].id; |
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69 | |
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70 | return -1; |
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71 | } |
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72 | |
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73 | int roardsp_chanlist2str(char * list, size_t len, char * str, size_t strlen) { |
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74 | int i; |
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75 | |
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76 | if ( list == NULL && len > 0 ) |
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77 | return -1; |
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78 | |
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79 | if ( (str == NULL || strlen == 0) && len > 0 ) |
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80 | return -1; |
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81 | |
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82 | if ( len == 0 ) { |
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83 | if ( str != NULL && strlen > 0 ) |
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84 | *str = 0; |
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85 | |
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86 | return 0; |
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87 | } |
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88 | |
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89 | // TODO: FIXME: do not ignore strlen from here |
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90 | *str = 0; |
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91 | |
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92 | for (i = 0; i < len; i++) { |
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93 | if ( i != 0 ) |
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94 | strcat(str, ","); |
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95 | |
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96 | strcat(str, roardsp_chan2str(list[i])); |
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97 | } |
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98 | |
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99 | return 0; |
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100 | } |
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101 | |
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102 | int roardsp_chanlist_init(char * list, int channels, int map) { |
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103 | if ( channels == 0 ) |
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104 | return 0; |
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105 | |
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106 | if ( list == NULL ) |
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107 | return -1; |
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108 | |
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109 | if ( channels > ROAR_MAX_CHANNELS ) |
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110 | return -1; |
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111 | |
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112 | // test for common maps: |
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113 | if ( channels == 1 ) { |
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114 | list[0] = ROARDSP_CHAN_MONO; |
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115 | return 0; |
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116 | } |
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117 | |
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118 | if ( channels == 2 ) { |
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119 | list[0] = ROARDSP_CHAN_LEFT; |
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120 | list[1] = ROARDSP_CHAN_RIGHT; |
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121 | return 0; |
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122 | } |
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123 | |
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124 | // test for specific maps: |
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125 | switch (map) { |
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126 | case ROARDSP_CHANLIST_MAP_ROARAUDIO: |
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127 | case ROARDSP_CHANLIST_MAP_FLAC: |
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128 | if ( map == ROARDSP_CHANLIST_MAP_FLAC && channels > 6 ) { |
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129 | // FLAC only has a fixed mapping for up to 6 channels. |
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130 | return -1; |
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131 | } |
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132 | |
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133 | switch (channels) { |
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134 | // FLAC or RoarAudio: |
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135 | case 3: |
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136 | list[0] = ROARDSP_CHAN_LEFT; |
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137 | list[1] = ROARDSP_CHAN_RIGHT; |
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138 | list[2] = ROARDSP_CHAN_CENTER; |
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139 | break; |
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140 | case 4: |
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141 | list[0] = ROARDSP_CHAN_FRONT_LEFT; |
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142 | list[1] = ROARDSP_CHAN_FRONT_RIGHT; |
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143 | list[2] = ROARDSP_CHAN_BACK_LEFT; |
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144 | list[3] = ROARDSP_CHAN_BACK_RIGHT; |
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145 | break; |
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146 | case 5: |
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147 | list[0] = ROARDSP_CHAN_FRONT_LEFT; |
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148 | list[1] = ROARDSP_CHAN_FRONT_RIGHT; |
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149 | list[2] = ROARDSP_CHAN_CENTER; |
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150 | list[3] = ROARDSP_CHAN_BACK_LEFT; |
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151 | list[4] = ROARDSP_CHAN_BACK_RIGHT; |
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152 | break; |
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153 | case 6: |
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154 | list[0] = ROARDSP_CHAN_FRONT_LEFT; |
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155 | list[1] = ROARDSP_CHAN_FRONT_RIGHT; |
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156 | list[2] = ROARDSP_CHAN_CENTER; |
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157 | list[3] = ROARDSP_CHAN_LFE; |
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158 | list[4] = ROARDSP_CHAN_BACK_LEFT; |
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159 | list[5] = ROARDSP_CHAN_BACK_RIGHT; |
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160 | break; |
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161 | // RoarAudio: |
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162 | case 7: |
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163 | list[0] = ROARDSP_CHAN_FRONT_LEFT; |
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164 | list[1] = ROARDSP_CHAN_FRONT_RIGHT; |
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165 | list[2] = ROARDSP_CHAN_CENTER; |
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166 | list[3] = ROARDSP_CHAN_LFE; |
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167 | list[4] = ROARDSP_CHAN_SIDE_LEFT; |
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168 | list[5] = ROARDSP_CHAN_SIDE_RIGHT; |
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169 | list[6] = ROARDSP_CHAN_BACK_CENTER; |
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170 | break; |
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171 | case 8: |
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172 | list[0] = ROARDSP_CHAN_FRONT_LEFT; |
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173 | list[1] = ROARDSP_CHAN_FRONT_RIGHT; |
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174 | list[2] = ROARDSP_CHAN_CENTER; |
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175 | list[3] = ROARDSP_CHAN_LFE; |
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176 | list[4] = ROARDSP_CHAN_SIDE_LEFT; |
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177 | list[5] = ROARDSP_CHAN_SIDE_RIGHT; |
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178 | list[6] = ROARDSP_CHAN_BACK_LEFT; |
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179 | list[7] = ROARDSP_CHAN_BACK_RIGHT; |
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180 | break; |
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181 | default: |
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182 | return -1; |
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183 | break; |
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184 | } |
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185 | break; |
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186 | case ROARDSP_CHANLIST_MAP_VORBIS: |
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187 | switch (channels) { |
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188 | case 3: |
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189 | list[0] = ROARDSP_CHAN_LEFT; |
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190 | list[1] = ROARDSP_CHAN_CENTER; |
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191 | list[2] = ROARDSP_CHAN_RIGHT; |
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192 | break; |
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193 | case 4: |
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194 | list[0] = ROARDSP_CHAN_FRONT_LEFT; |
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195 | list[1] = ROARDSP_CHAN_FRONT_RIGHT; |
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196 | list[2] = ROARDSP_CHAN_BACK_LEFT; |
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197 | list[3] = ROARDSP_CHAN_BACK_RIGHT; |
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198 | break; |
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199 | case 5: |
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200 | list[0] = ROARDSP_CHAN_FRONT_LEFT; |
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201 | list[1] = ROARDSP_CHAN_CENTER; |
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202 | list[2] = ROARDSP_CHAN_FRONT_RIGHT; |
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203 | list[3] = ROARDSP_CHAN_BACK_LEFT; |
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204 | list[4] = ROARDSP_CHAN_BACK_RIGHT; |
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205 | break; |
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206 | case 6: |
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207 | list[0] = ROARDSP_CHAN_FRONT_LEFT; |
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208 | list[1] = ROARDSP_CHAN_CENTER; |
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209 | list[2] = ROARDSP_CHAN_FRONT_RIGHT; |
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210 | list[3] = ROARDSP_CHAN_BACK_LEFT; |
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211 | list[4] = ROARDSP_CHAN_BACK_RIGHT; |
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212 | list[5] = ROARDSP_CHAN_LFE; |
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213 | break; |
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214 | case 7: |
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215 | list[0] = ROARDSP_CHAN_FRONT_LEFT; |
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216 | list[1] = ROARDSP_CHAN_CENTER; |
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217 | list[2] = ROARDSP_CHAN_FRONT_RIGHT; |
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218 | list[3] = ROARDSP_CHAN_SIDE_LEFT; |
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219 | list[4] = ROARDSP_CHAN_SIDE_RIGHT; |
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220 | list[5] = ROARDSP_CHAN_BACK_CENTER; |
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221 | list[6] = ROARDSP_CHAN_LFE; |
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222 | break; |
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223 | case 8: |
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224 | list[0] = ROARDSP_CHAN_FRONT_LEFT; |
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225 | list[1] = ROARDSP_CHAN_CENTER; |
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226 | list[2] = ROARDSP_CHAN_FRONT_RIGHT; |
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227 | list[3] = ROARDSP_CHAN_SIDE_LEFT; |
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228 | list[4] = ROARDSP_CHAN_SIDE_RIGHT; |
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229 | list[5] = ROARDSP_CHAN_BACK_LEFT; |
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230 | list[6] = ROARDSP_CHAN_BACK_RIGHT; |
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231 | list[7] = ROARDSP_CHAN_LFE; |
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232 | break; |
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233 | default: |
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234 | return -1; |
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235 | break; |
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236 | } |
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237 | break; |
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238 | case ROARDSP_CHANLIST_MAP_OSS: |
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239 | switch (channels) { |
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240 | case 8: |
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241 | list[7] = ROARDSP_CHAN_BACK_RIGHT; |
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242 | case 7: |
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243 | list[6] = ROARDSP_CHAN_BACK_LEFT; |
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244 | case 6: |
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245 | list[5] = ROARDSP_CHAN_SIDE_RIGHT; |
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246 | case 5: |
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247 | list[4] = ROARDSP_CHAN_SIDE_LEFT; |
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248 | case 4: |
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249 | list[3] = ROARDSP_CHAN_LFE; |
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250 | case 3: |
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251 | list[2] = ROARDSP_CHAN_CENTER; |
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252 | list[1] = ROARDSP_CHAN_RIGHT; |
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253 | list[0] = ROARDSP_CHAN_LEFT; |
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254 | break; |
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255 | default: |
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256 | return -1; |
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257 | break; |
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258 | } |
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259 | break; |
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260 | case ROARDSP_CHANLIST_MAP_ALSA: |
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261 | // we guess: L,R,BL,BR,C,LFE,SL,SR (really, just guessing, see ALSA plugin of libao) |
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262 | switch (channels) { |
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263 | case 8: |
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264 | list[7] = ROARDSP_CHAN_BACK_RIGHT; |
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265 | case 7: |
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266 | list[6] = ROARDSP_CHAN_BACK_LEFT; |
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267 | case 6: |
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268 | list[5] = ROARDSP_CHAN_LFE; |
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269 | case 5: |
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270 | list[4] = ROARDSP_CHAN_CENTER; |
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271 | case 4: |
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272 | list[3] = ROARDSP_CHAN_BACK_RIGHT; |
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273 | case 3: |
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274 | list[2] = ROARDSP_CHAN_BACK_LEFT; |
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275 | list[1] = ROARDSP_CHAN_RIGHT; |
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276 | list[0] = ROARDSP_CHAN_LEFT; |
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277 | break; |
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278 | default: |
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279 | return -1; |
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280 | break; |
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281 | } |
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282 | break; |
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283 | case ROARDSP_CHANLIST_MAP_RIFF_WAVE: |
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284 | // here we are again, guessing: L,R,C,LFE,BL,BR,CL,CR,BC,SL,SR |
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285 | // strange, C, LFE on 4 channel file? |
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286 | // return -1 to be sure.... |
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287 | switch (channels) { |
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288 | default: |
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289 | return -1; |
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290 | break; |
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291 | } |
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292 | break; |
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293 | default: |
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294 | return -1; |
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295 | break; |
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296 | } |
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297 | |
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298 | return 0; |
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299 | } |
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300 | |
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301 | int roardsp_chanmap_calc(struct roardsp_chanmap * map, int what, int err_on_none) { |
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302 | int a, b; |
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303 | |
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304 | if ( map == NULL ) |
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305 | return -1; |
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306 | |
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307 | switch (what) { |
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308 | case ROARDSP_CHANMAP_MAP: |
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309 | memset(map->map, (char)-1, sizeof(map->map)); |
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310 | |
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311 | for (a = 0; a < ROAR_MAX_CHANNELS; a++) { |
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312 | if ( map->in[a] == ROARDSP_CHAN_NONE ) |
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313 | continue; |
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314 | |
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315 | for (b = 0; b < ROAR_MAX_CHANNELS; b++) { |
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316 | if ( map->in[a] == map->out[b] ) { |
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317 | map->map[a] = b; |
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318 | break; |
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319 | } |
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320 | } |
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321 | if ( b == ROAR_MAX_CHANNELS ) { // src not found in dest |
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322 | if ( err_on_none ) |
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323 | return -1; |
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324 | |
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325 | map->map[a] = -1; |
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326 | } |
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327 | } |
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328 | break; |
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329 | case ROARDSP_CHANMAP_IN: |
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330 | case ROARDSP_CHANMAP_OUT: |
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331 | default: |
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332 | return -1; |
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333 | break; |
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334 | } |
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335 | |
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336 | return 0; |
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337 | } |
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338 | |
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339 | //ll |
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