Changeset 5469:23c09a8dc701 in roaraudio

Timestamp:

04/11/12 10:24:14 (11 years ago)

Author:

phi

Branch:

default

Phase:

public

Message:

added an filter to do: r = -(l = (l+r)/2.1) (usefull for broken headphones

Files:

• include/libroardsp/filter.h (modified) (1 diff)
• libroardsp/filter_downmix.c (modified) (1 diff)

include/libroardsp/filter.h

@@ -83 +83 @@
 #define ROARDSP_DOWNMIX_ARITHMETIC    3
 #define ROARDSP_DOWNMIX_RMS           4
+#define ROARDSP_DOWNMIX_ARITHMETIC_INVERSE    5
 
 #define ROARDSP_DCBLOCK_NUMBLOCKS     100

libroardsp/filter_downmix.c

@@ -52 +52 @@
      samp[i  ] = s.i32;
      samp[i+1] = s.i32;
+    }
+   break;
+  case ROARDSP_DOWNMIX_ARITHMETIC_INVERSE:
+    for (i = 0; i < samples; i += 2) {
+     s.i32     = (float)(samp[i] + samp[i+1])/2.1;
+     samp[i  ] = s.i32;
+     samp[i+1] = -s.i32;
     }
    break;