[0] | 1 | //mixer.c: |
---|
| 2 | |
---|
| 3 | #include "roard.h" |
---|
| 4 | |
---|
| 5 | int mix_clients (void * output, int bits, void ** input, int samples) { |
---|
| 6 | if ( bits == 8 ) { |
---|
| 7 | return mix_clients_8bit(output, input, samples); |
---|
| 8 | } else if ( bits == 16 ) { |
---|
| 9 | return mix_clients_16bit(output, input, samples); |
---|
| 10 | } else if ( bits == 24 ) { |
---|
| 11 | return mix_clients_24bit(output, input, samples); |
---|
| 12 | } else if ( bits == 32 ) { |
---|
| 13 | return mix_clients_32bit(output, input, samples); |
---|
| 14 | } else { |
---|
| 15 | return -1; |
---|
| 16 | } |
---|
| 17 | } |
---|
| 18 | |
---|
| 19 | int mix_clients_8bit (void * output, void ** input, int samples) { |
---|
| 20 | int i, s; |
---|
| 21 | int c; |
---|
| 22 | |
---|
| 23 | for (s = 0; s < samples; s++) { |
---|
| 24 | c = 0; |
---|
| 25 | |
---|
| 26 | for (i = 0; input[i] != NULL; i++) |
---|
| 27 | c += ((char**)input)[i][s]; |
---|
| 28 | |
---|
| 29 | if ( c > 127 ) |
---|
| 30 | c = 127; |
---|
| 31 | else if ( c < -128 ) |
---|
| 32 | c = -128; |
---|
| 33 | ((char*)output)[s] = (char)c; |
---|
| 34 | } |
---|
| 35 | |
---|
| 36 | return 0; |
---|
| 37 | } |
---|
| 38 | |
---|
| 39 | int mix_clients_16bit (void * output, void ** input, int samples) { |
---|
| 40 | int i, s; |
---|
| 41 | int c; |
---|
| 42 | int16_t ** in = (int16_t**) input; |
---|
| 43 | int16_t * out = output; |
---|
| 44 | |
---|
| 45 | #ifdef DEBUG |
---|
| 46 | for (i = 0; input[i] != NULL; i++) |
---|
| 47 | ROAR_DBG("mix_clients_16bit(*): input[%i] = %p", i, input[i]); |
---|
| 48 | #endif |
---|
| 49 | |
---|
| 50 | /* |
---|
| 51 | if ( input[0] != NULL ) |
---|
| 52 | write(1, input[0], samples*2); |
---|
| 53 | */ |
---|
| 54 | |
---|
| 55 | /* |
---|
| 56 | if ( input[0] != NULL ) { |
---|
| 57 | memcpy(output, input[0], samples*2); |
---|
| 58 | return -1; |
---|
| 59 | } |
---|
| 60 | */ |
---|
| 61 | |
---|
| 62 | for (s = 0; s < samples; s++) { |
---|
| 63 | c = 0; |
---|
| 64 | for (i = 0; input[i] != NULL; i++) |
---|
| 65 | c += in[i][s]; |
---|
| 66 | |
---|
| 67 | if ( c > 32767 ) |
---|
| 68 | c = 32767; |
---|
| 69 | else if ( c < -32768 ) |
---|
| 70 | c = -32768; |
---|
| 71 | |
---|
| 72 | out[s] = c; |
---|
| 73 | } |
---|
| 74 | |
---|
| 75 | return 0; |
---|
| 76 | } |
---|
| 77 | |
---|
| 78 | int mix_clients_24bit (void * output, void ** input, int samples) { |
---|
| 79 | return -1; |
---|
| 80 | } |
---|
| 81 | |
---|
| 82 | int mix_clients_32bit (void * output, void ** input, int samples) { |
---|
| 83 | /* |
---|
| 84 | int i, s; |
---|
| 85 | int c; |
---|
| 86 | |
---|
| 87 | for (s = 0; s < samples; s++) { |
---|
| 88 | c = 0; |
---|
| 89 | |
---|
| 90 | for (i = 0; input[i]; i++) |
---|
| 91 | c += ((int**)input)[i][s]; |
---|
| 92 | |
---|
| 93 | if ( c > 127 ) |
---|
| 94 | c = 127; |
---|
| 95 | else if ( c < -128 ) |
---|
| 96 | c = -128; |
---|
| 97 | ((int*)output)[s] = (char)c; |
---|
| 98 | } |
---|
| 99 | |
---|
| 100 | return 0; |
---|
| 101 | */ |
---|
| 102 | return 1; |
---|
| 103 | } |
---|
| 104 | |
---|
| 105 | //ll |
---|