[0] | 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 | 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 | 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 | c += in[i][s]; |
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| 66 | |
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| 67 | if ( c > 32767 ) |
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| 68 | c = 32767; |
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| 69 | else if ( c < -32768 ) |
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| 70 | c = -32768; |
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| 71 | |
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| 72 | out[s] = c; |
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| 73 | } |
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| 74 | |
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| 75 | return 0; |
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| 76 | } |
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| 77 | |
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| 78 | int mix_clients_24bit (void * output, void ** input, int samples) { |
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| 79 | return -1; |
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| 80 | } |
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| 81 | |
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| 82 | int mix_clients_32bit (void * output, void ** input, int samples) { |
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| 83 | /* |
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| 84 | int i, s; |
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| 85 | int c; |
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| 86 | |
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| 87 | for (s = 0; s < samples; s++) { |
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| 88 | c = 0; |
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| 89 | |
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| 90 | for (i = 0; input[i]; i++) |
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| 91 | c += ((int**)input)[i][s]; |
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| 92 | |
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| 93 | if ( c > 127 ) |
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| 94 | c = 127; |
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| 95 | else if ( c < -128 ) |
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| 96 | c = -128; |
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| 97 | ((int*)output)[s] = (char)c; |
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| 98 | } |
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| 99 | |
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| 100 | return 0; |
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| 101 | */ |
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| 102 | return 1; |
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| 103 | } |
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| 104 | |
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[16] | 105 | int change_vol (void * output, int bits, void * input, int samples, int channels, struct roar_mixer_settings * set) { |
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[18] | 106 | |
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| 107 | ROAR_DBG("change_vol(*): mixer at %p", set->mixer); |
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| 108 | |
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[16] | 109 | if ( bits == 8 ) { |
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| 110 | return change_vol_8bit(output, input, samples, channels, set); |
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| 111 | } else if ( bits == 16 ) { |
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| 112 | return change_vol_16bit(output, input, samples, channels, set); |
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| 113 | } else if ( bits == 24 ) { |
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| 114 | return change_vol_24bit(output, input, samples, channels, set); |
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| 115 | } else if ( bits == 32 ) { |
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| 116 | return change_vol_32bit(output, input, samples, channels, set); |
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| 117 | } else { |
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| 118 | return -1; |
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| 119 | } |
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| 120 | } |
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| 121 | |
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| 122 | int change_vol_8bit (void * output, void * input, int samples, int channels, struct roar_mixer_settings * set) { |
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[17] | 123 | char * in = input, * out = output; |
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[16] | 124 | int i; |
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| 125 | int s; |
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| 126 | |
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| 127 | if ( !(in && out) ) |
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| 128 | return -1; |
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| 129 | |
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| 130 | for (i = 0; i < samples; i++) { |
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| 131 | s = in[i]; |
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| 132 | s *= set->mixer[i % channels]; |
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| 133 | s /= set->scale; |
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| 134 | out[i] = s; |
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| 135 | } |
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| 136 | |
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| 137 | return 0; |
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| 138 | } |
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| 139 | |
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| 140 | int change_vol_16bit (void * output, void * input, int samples, int channels, struct roar_mixer_settings * set) { |
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[17] | 141 | int16_t * in = input, * out = output; |
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[16] | 142 | int i; |
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| 143 | int s; |
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| 144 | |
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| 145 | if ( !(in && out) ) |
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| 146 | return -1; |
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| 147 | |
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| 148 | for (i = 0; i < samples; i++) { |
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| 149 | s = in[i]; |
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| 150 | s *= set->mixer[i % channels]; |
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| 151 | s /= set->scale; |
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| 152 | out[i] = s; |
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| 153 | } |
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| 154 | |
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| 155 | return 0; |
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| 156 | } |
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| 157 | |
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| 158 | int change_vol_24bit (void * output, void * input, int samples, int channels, struct roar_mixer_settings * set) { |
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| 159 | return -1; |
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| 160 | } |
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| 161 | |
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| 162 | int change_vol_32bit (void * output, void * input, int samples, int channels, struct roar_mixer_settings * set) { |
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| 163 | return -1; |
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| 164 | } |
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| 165 | |
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| 166 | |
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[0] | 167 | //ll |
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