Changeset 2741:09f063a4a56e in roaraudio

Timestamp:

09/21/09 02:18:37 (15 years ago)

Author:

phi

Branch:

default

Phase:

public

Message:

added roar_conv_chans_2to316()

File:

• libroardsp/convert.c (modified) (2 diffs)

libroardsp/convert.c

@@ -214 +214 @@
      switch (to) {
       case  1: return roar_conv_chans_2to116(out, in, samples);
+      case  3: return roar_conv_chans_2to316(out, in, samples);
       default: return -1;
      }
@@ -351 +352 @@
  return 0;
 }
+
+int roar_conv_chans_2to38  (void * out, void * in, int samples);
+int roar_conv_chans_2to316 (void * out, void * in, int samples) {
+ int16_t * ip = (int16_t*) in, * op = (int16_t*) out;
+ int i, h;
+
+ samples -= 2;
+
+ i  = samples;
+ h  = (samples / 2) * 3;
+
+ for (; i >= 0; i -= 2, h -= 3) {
+  op[h+0] = ip[i+0];
+  op[h+1] = ip[i+1];
+  op[h+2] = ((int)ip[i + 0] + (int)ip[i + 1]) / 2;
+ }
+
+ return 0;
+}
+
+int roar_conv_chans_2to48  (void * out, void * in, int samples);
+int roar_conv_chans_2to416 (void * out, void * in, int samples);
+int roar_conv_chans_2to58  (void * out, void * in, int samples);
+int roar_conv_chans_2to516 (void * out, void * in, int samples);
+int roar_conv_chans_2to68  (void * out, void * in, int samples);
+int roar_conv_chans_2to616 (void * out, void * in, int samples);
+
 
 int roar_conv_rate (void * out, void * in, int samples, int from, int to, int bits, int channels) {