Add MxPEG decoder

[ffmpeg] / libavcodec / fmtconvert.c

diff --git a/libavcodec/fmtconvert.c b/libavcodec/fmtconvert.c
index e27c1f69f4e93a5013d89a908e0d19aa8595e935..0e8aa5e909314c5a67bc98a5ff76ac11ca70f9d2 100644 (file)
--- a/libavcodec/fmtconvert.c
+++ b/libavcodec/fmtconvert.c
@@ -66,3 +66,34 @@ av_cold void ff_fmt_convert_init(FmtConvertContext *c, AVCodecContext *avctx)
     if (HAVE_ALTIVEC) ff_fmt_convert_init_altivec(c, avctx);
     if (HAVE_MMX) ff_fmt_convert_init_x86(c, avctx);
 }
+
+/* ffdshow custom code */
+void float_interleave(float *dst, const float **src, long len, int channels)
+{
+    int i,j,c;
+    if(channels==2){
+        for(i=0; i<len; i++){
+            dst[2*i]   = src[0][i] / 32768.0f;
+            dst[2*i+1] = src[1][i] / 32768.0f;
+        }
+    }else{
+        for(c=0; c<channels; c++)
+            for(i=0, j=c; i<len; i++, j+=channels)
+                dst[j] = src[c][i] / 32768.0f;
+    }
+}
+
+void float_interleave_noscale(float *dst, const float **src, long len, int channels)
+{
+    int i,j,c;
+    if(channels==2){
+        for(i=0; i<len; i++){
+            dst[2*i]   = src[0][i];
+            dst[2*i+1] = src[1][i];
+        }
+    }else{
+        for(c=0; c<channels; c++)
+            for(i=0, j=c; i<len; i++, j+=channels)
+                dst[j] = src[c][i];
+    }
+}