1 | //mixer.c: |
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2 | |
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3 | #include "roard.h" |
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4 | |
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5 | int mix_clients (void * output, int bits, void ** input, int samples) { |
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6 | if ( bits == 8 ) { |
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7 | return mix_clients_8bit(output, input, samples); |
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8 | } else if ( bits == 16 ) { |
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9 | return mix_clients_16bit(output, input, samples); |
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10 | } else if ( bits == 24 ) { |
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11 | return mix_clients_24bit(output, input, samples); |
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12 | } else if ( bits == 32 ) { |
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13 | return mix_clients_32bit(output, input, samples); |
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14 | } else { |
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15 | return -1; |
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16 | } |
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17 | } |
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18 | |
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19 | int mix_clients_8bit (void * output, void ** input, int samples) { |
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20 | int i, s; |
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21 | register int c; |
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22 | |
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23 | for (s = 0; s < samples; s++) { |
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24 | c = 0; |
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25 | |
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26 | for (i = 0; input[i] != NULL; i++) |
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27 | c += ((char**)input)[i][s]; |
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28 | |
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29 | if ( c > 127 ) |
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30 | c = 127; |
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31 | else if ( c < -128 ) |
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32 | c = -128; |
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33 | ((char*)output)[s] = (char)c; |
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34 | } |
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35 | |
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36 | return 0; |
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37 | } |
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38 | |
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39 | int mix_clients_16bit (void * output, void ** input, int samples) { |
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40 | int i, s; |
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41 | register int c; |
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42 | int16_t ** in = (int16_t**) input; |
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43 | int16_t * out = output; |
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44 | |
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45 | #ifdef DEBUG |
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46 | for (i = 0; input[i] != NULL; i++) |
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47 | ROAR_DBG("mix_clients_16bit(*): input[%i] = %p", i, input[i]); |
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48 | #endif |
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49 | |
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50 | /* |
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51 | if ( input[0] != NULL ) |
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52 | write(1, input[0], samples*2); |
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53 | */ |
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54 | |
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55 | /* |
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56 | if ( input[0] != NULL ) { |
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57 | memcpy(output, input[0], samples*2); |
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58 | return -1; |
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59 | } |
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60 | */ |
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61 | |
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62 | for (s = 0; s < samples; s++) { |
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63 | c = 0; |
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64 | for (i = 0; input[i] != NULL; i++) { |
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65 | // printf("D: input[i=%i] = %p\n", i, input[i]); |
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66 | c += in[i][s]; |
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67 | } |
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68 | |
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69 | if ( c > 32767 ) |
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70 | c = 32767; |
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71 | else if ( c < -32768 ) |
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72 | c = -32768; |
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73 | |
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74 | out[s] = c; |
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75 | } |
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76 | |
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77 | return 0; |
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78 | } |
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79 | |
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80 | int mix_clients_24bit (void * output, void ** input, int samples) { |
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81 | return -1; |
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82 | } |
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83 | |
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84 | int mix_clients_32bit (void * output, void ** input, int samples) { |
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85 | /* |
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86 | int i, s; |
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87 | int c; |
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88 | |
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89 | for (s = 0; s < samples; s++) { |
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90 | c = 0; |
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91 | |
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92 | for (i = 0; input[i]; i++) |
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93 | c += ((int**)input)[i][s]; |
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94 | |
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95 | if ( c > 127 ) |
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96 | c = 127; |
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97 | else if ( c < -128 ) |
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98 | c = -128; |
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99 | ((int*)output)[s] = (char)c; |
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100 | } |
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101 | |
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102 | return 0; |
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103 | */ |
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104 | return 1; |
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105 | } |
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106 | |
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107 | int change_vol (void * output, int bits, void * input, int samples, int channels, struct roar_mixer_settings * set) { |
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108 | |
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109 | ROAR_DBG("change_vol(*): mixer at %p", set->mixer); |
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110 | |
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111 | if ( bits == 8 ) { |
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112 | return change_vol_8bit(output, input, samples, channels, set); |
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113 | } else if ( bits == 16 ) { |
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114 | return change_vol_16bit(output, input, samples, channels, set); |
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115 | } else if ( bits == 24 ) { |
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116 | return change_vol_24bit(output, input, samples, channels, set); |
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117 | } else if ( bits == 32 ) { |
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118 | return change_vol_32bit(output, input, samples, channels, set); |
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119 | } else { |
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120 | return -1; |
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121 | } |
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122 | } |
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123 | |
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124 | int change_vol_8bit (void * output, void * input, int samples, int channels, struct roar_mixer_settings * set) { |
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125 | char * in = input, * out = output; |
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126 | int i; |
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127 | register int s; |
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128 | |
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129 | if ( !(in && out) ) |
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130 | return -1; |
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131 | |
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132 | if (set->rpg_mul == set->rpg_div) { |
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133 | for (i = 0; i < samples; i++) { |
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134 | s = in[i]; |
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135 | s *= set->mixer[i % channels]; |
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136 | s /= set->scale; |
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137 | out[i] = s; |
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138 | } |
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139 | } else { |
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140 | for (i = 0; i < samples; i++) { |
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141 | s = in[i]; |
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142 | s *= (set->mixer[i % channels] * set->rpg_mul) / set->rpg_div; |
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143 | s /= set->scale; |
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144 | out[i] = s; |
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145 | } |
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146 | } |
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147 | |
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148 | return 0; |
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149 | } |
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150 | |
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151 | int change_vol_16bit (void * output, void * input, int samples, int channels, struct roar_mixer_settings * set) { |
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152 | int16_t * in = input, * out = output; |
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153 | int i; |
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154 | register int s; |
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155 | |
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156 | if ( !(in && out) ) |
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157 | return -1; |
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158 | |
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159 | if (set->rpg_mul == set->rpg_div) { |
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160 | for (i = 0; i < samples; i++) { |
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161 | s = in[i]; |
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162 | s *= set->mixer[i % channels]; |
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163 | s /= set->scale; |
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164 | out[i] = s; |
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165 | } |
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166 | } else { |
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167 | for (i = 0; i < samples; i++) { |
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168 | s = in[i]; |
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169 | s *= (set->mixer[i % channels] * set->rpg_mul) / set->rpg_div; |
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170 | s /= set->scale; |
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171 | out[i] = s; |
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172 | } |
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173 | } |
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174 | |
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175 | return 0; |
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176 | } |
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177 | |
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178 | int change_vol_24bit (void * output, void * input, int samples, int channels, struct roar_mixer_settings * set) { |
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179 | return -1; |
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180 | } |
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181 | |
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182 | int change_vol_32bit (void * output, void * input, int samples, int channels, struct roar_mixer_settings * set) { |
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183 | return -1; |
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184 | } |
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185 | |
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186 | |
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187 | //ll |
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