1 | //mixer.c: |
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2 | |
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3 | /* |
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4 | * Copyright (C) Philipp 'ph3-der-loewe' Schafft - 2008 |
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5 | * |
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6 | * This file is part of roard 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 | * RoarAudio 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, 675 Mass Ave, Cambridge, MA 02139, USA. |
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22 | * |
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23 | */ |
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24 | |
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25 | #include "roard.h" |
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26 | |
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27 | int mix_clients (void * output, int bits, void ** input, int samples) { |
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28 | if ( bits == 8 ) { |
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29 | return mix_clients_8bit(output, input, samples); |
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30 | } else if ( bits == 16 ) { |
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31 | return mix_clients_16bit(output, input, samples); |
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32 | } else if ( bits == 24 ) { |
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33 | return mix_clients_24bit(output, input, samples); |
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34 | } else if ( bits == 32 ) { |
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35 | return mix_clients_32bit(output, input, samples); |
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36 | } else { |
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37 | return -1; |
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38 | } |
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39 | } |
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40 | |
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41 | int mix_clients_8bit (void * output, void ** input, int samples) { |
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42 | int i, s; |
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43 | register int c; |
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44 | |
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45 | for (s = 0; s < samples; s++) { |
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46 | c = 0; |
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47 | |
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48 | for (i = 0; input[i] != NULL; i++) |
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49 | c += ((char**)input)[i][s]; |
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50 | |
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51 | if ( c > 127 ) |
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52 | c = 127; |
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53 | else if ( c < -128 ) |
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54 | c = -128; |
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55 | ((char*)output)[s] = (char)c; |
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56 | } |
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57 | |
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58 | return 0; |
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59 | } |
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60 | |
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61 | int mix_clients_16bit (void * output, void ** input, int samples) { |
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62 | int i, s; |
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63 | register int_least32_t c; |
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64 | int16_t ** in = (int16_t**) input; |
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65 | int16_t * out = output; |
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66 | |
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67 | #ifdef DEBUG |
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68 | for (i = 0; input[i] != NULL; i++) |
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69 | ROAR_DBG("mix_clients_16bit(*): input[%i] = %p", i, input[i]); |
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70 | #endif |
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71 | |
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72 | /* |
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73 | if ( input[0] != NULL ) |
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74 | write(1, input[0], samples*2); |
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75 | */ |
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76 | |
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77 | /* |
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78 | if ( input[0] != NULL ) { |
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79 | memcpy(output, input[0], samples*2); |
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80 | return -1; |
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81 | } |
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82 | */ |
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83 | |
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84 | for (s = 0; s < samples; s++) { |
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85 | c = 0; |
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86 | for (i = 0; input[i] != NULL; i++) { |
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87 | // printf("D: input[i=%i] = %p\n", i, input[i]); |
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88 | c += in[i][s]; |
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89 | } |
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90 | |
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91 | if ( c > 32767 ) |
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92 | c = 32767; |
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93 | else if ( c < -32768 ) |
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94 | c = -32768; |
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95 | |
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96 | out[s] = c; |
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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 mix_clients_24bit (void * output, void ** input, int samples) { |
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103 | return -1; |
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104 | } |
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105 | |
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106 | int mix_clients_32bit (void * output, void ** input, int samples) { |
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107 | #ifdef ROAR_NATIVE_INT64 |
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108 | int32_t ** in = (int32_t**) input; |
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109 | int32_t * out = (int32_t* ) output; |
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110 | int i, s; |
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111 | ROAR_NATIVE_INT64 c; |
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112 | |
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113 | for (s = 0; s < samples; s++) { |
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114 | c = 0; |
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115 | |
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116 | for (i = 0; input[i]; i++) |
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117 | c += in[i][s]; |
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118 | |
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119 | if ( c > 21474836487LL ) |
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120 | c = 2147483647LL; |
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121 | else if ( c < -2147483648LL ) |
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122 | c = -2147483648LL; |
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123 | out[s] = (int32_t)c; |
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124 | } |
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125 | |
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126 | return 0; |
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127 | #else |
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128 | return -1; |
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129 | #endif |
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130 | } |
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131 | |
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132 | int change_vol (void * output, int bits, void * input, int samples, int channels, struct roar_mixer_settings * set) { |
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133 | |
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134 | ROAR_DBG("change_vol(*): mixer at %p", set->mixer); |
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135 | |
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136 | if ( bits == 8 ) { |
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137 | return change_vol_8bit(output, input, samples, channels, set); |
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138 | } else if ( bits == 16 ) { |
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139 | return change_vol_16bit(output, input, samples, channels, set); |
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140 | } else if ( bits == 24 ) { |
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141 | return change_vol_24bit(output, input, samples, channels, set); |
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142 | } else if ( bits == 32 ) { |
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143 | return change_vol_32bit(output, input, samples, channels, set); |
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144 | } else { |
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145 | return -1; |
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146 | } |
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147 | } |
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148 | |
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149 | int change_vol_8bit (void * output, void * input, int samples, int channels, struct roar_mixer_settings * set) { |
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150 | char * in = input, * out = output; |
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151 | int i; |
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152 | register int s; |
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153 | |
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154 | if ( !(in && out) ) |
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155 | return -1; |
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156 | |
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157 | if (set->rpg_mul == set->rpg_div) { |
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158 | for (i = 0; i < samples; i++) { |
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159 | s = in[i]; |
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160 | s *= set->mixer[i % channels]; |
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161 | s /= set->scale; |
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162 | out[i] = s; |
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163 | } |
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164 | } else { |
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165 | for (i = 0; i < samples; i++) { |
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166 | s = in[i]; |
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167 | s *= (set->mixer[i % channels] * set->rpg_mul) / set->rpg_div; |
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168 | s /= set->scale; |
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169 | out[i] = s; |
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170 | } |
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171 | } |
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172 | |
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173 | return 0; |
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174 | } |
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175 | |
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176 | int change_vol_16bit (void * output, void * input, int samples, int channels, struct roar_mixer_settings * set) { |
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177 | int16_t * in = input, * out = output; |
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178 | int i; |
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179 | register int s; |
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180 | |
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181 | if ( !(in && out) ) |
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182 | return -1; |
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183 | |
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184 | if (set->rpg_mul == set->rpg_div) { |
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185 | for (i = 0; i < samples; i++) { |
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186 | s = in[i]; |
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187 | s *= set->mixer[i % channels]; |
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188 | s /= set->scale; |
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189 | out[i] = s; |
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190 | } |
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191 | } else { |
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192 | for (i = 0; i < samples; i++) { |
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193 | s = in[i]; |
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194 | s *= (set->mixer[i % channels] * set->rpg_mul) / set->rpg_div; |
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195 | s /= set->scale; |
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196 | out[i] = s; |
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197 | } |
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198 | } |
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199 | |
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200 | return 0; |
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201 | } |
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202 | |
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203 | int change_vol_24bit (void * output, void * input, int samples, int channels, struct roar_mixer_settings * set) { |
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204 | return -1; |
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205 | } |
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206 | |
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207 | int change_vol_32bit (void * output, void * input, int samples, int channels, struct roar_mixer_settings * set) { |
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208 | #ifdef ROAR_NATIVE_INT64 |
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209 | int32_t * in = input, * out = output; |
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210 | int i; |
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211 | ROAR_NATIVE_INT64 s; |
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212 | |
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213 | if ( !(in && out) ) |
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214 | return -1; |
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215 | |
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216 | if (set->rpg_mul == set->rpg_div) { |
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217 | for (i = 0; i < samples; i++) { |
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218 | s = in[i]; |
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219 | s *= set->mixer[i % channels]; |
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220 | s /= set->scale; |
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221 | out[i] = s; |
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222 | } |
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223 | } else { |
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224 | for (i = 0; i < samples; i++) { |
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225 | s = in[i]; |
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226 | s *= (set->mixer[i % channels] * set->rpg_mul) / set->rpg_div; |
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227 | s /= set->scale; |
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228 | out[i] = s; |
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229 | } |
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230 | } |
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231 | |
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232 | return 0; |
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233 | #else |
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234 | return -1; |
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235 | #endif |
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236 | } |
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237 | |
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238 | int need_vol_change (int channels, struct roar_mixer_settings * set) { |
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239 | int i; |
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240 | |
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241 | if ( set == NULL || channels < 1 || channels > ROAR_MAX_CHANNELS ) |
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242 | return -1; |
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243 | |
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244 | if ( set->rpg_mul != set->rpg_div ) |
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245 | return 1; |
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246 | |
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247 | for (i = 0; i < channels; i++) |
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248 | if ( set->mixer[i] != set->scale ) |
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249 | return 1; |
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250 | |
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251 | return 0; |
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252 | } |
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253 | |
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254 | //ll |
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