Changeset 2750:3b5c1d0d75e0 in roaraudio for libroardsp/convert.c
- Timestamp:
- 09/22/09 02:15:50 (15 years ago)
- Branch:
- default
- Phase:
- public
- File:
-
- 1 edited
Legend:
- Unmodified
- Added
- Removed
-
libroardsp/convert.c
r2749 r2750 221 221 } 222 222 break; 223 case 4: 224 switch (to) { 225 case 1: return roar_conv_chans_nto116(out, in, samples, 4); 226 case 2: return roar_conv_chans_4to216(out, in, samples); 227 default: return -1; 228 } 229 break; 223 230 default: 224 231 switch (to) { … … 440 447 int roar_conv_chans_3to216 (void * out, void * in, int samples); 441 448 int roar_conv_chans_4to28 (void * out, void * in, int samples); 442 int roar_conv_chans_4to216 (void * out, void * in, int samples); 449 int roar_conv_chans_4to216 (void * out, void * in, int samples) { 450 int16_t * ip = (int16_t*) in, * op = (int16_t*) out; 451 int i, h; 452 453 samples -= 4; 454 455 for (i = h = 0; i < samples; i += 4, h += 2) { 456 op[h+0] = ((int)ip[i + 0] + (int)ip[i + 2]) / 2; 457 op[h+1] = ((int)ip[i + 1] + (int)ip[i + 3]) / 2; 458 } 459 460 return 0; 461 } 462 443 463 int roar_conv_chans_5to28 (void * out, void * in, int samples); 444 464 int roar_conv_chans_5to216 (void * out, void * in, int samples);
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