Changeset 626:f7076b318cdf in roaraudio

Timestamp:

08/20/08 13:09:58 (16 years ago)

Author:

phi

Branch:

default

Phase:

public

Message:

Added roar_conv_chans_nto18()

File:

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

libroardsp/convert.c

@@ -57 +57 @@
  } else if ( to == 1 ) {
   if ( bits == 8 ) {
-   return -1;
+   return roar_conv_chans_nto18(out, in, samples, from);
   } else if ( bits == 16 ) {
    return roar_conv_chans_nto116(out, in, samples, from);
@@ -88 +88 @@
   for (c = to - 1; c >= 0; c--)
    op[i*to + c] = ip[i];
+
+ return 0;
+}
+
+int roar_conv_chans_nto18  (void * out, void * in, int samples, int from) {
+ int8_t * ip = (int8_t*) in, * op = (int8_t*) out;
+ int i;
+ int c;
+ register int s;
+
+ samples /= from;
+
+ for (i = samples - 1; i >= 0; i--) {
+  s  = 0;
+
+  for (c = 0; c < from; c++)
+   s += ip[i*from + c];
+
+  s /= from;
+  op[i] = s;
+ }
 
  return 0;