Implement avcodec_get_channel_layout().

Patch by S.N. Hemanth Meenakshisundaram smeenaks:ucsd+edu.

Originally committed as revision 24936 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavcodec/audioconvert.c

@@ -121,6 +121,18 @@ static const struct {
     { 0 }
 };
 
+int64_t avcodec_get_channel_layout(const char *name)
+{
+    int i = 0;
+    do {
+        if (!strcmp(channel_layout_map[i].name, name))
+            return channel_layout_map[i].layout;
+        i++;
+    } while (channel_layout_map[i].name);
+
+    return 0;
+}
+
 void avcodec_get_channel_layout_string(char *buf, int buf_size, int nb_channels, int64_t channel_layout)
 {
     int i;

libavcodec/audioconvert.h

@@ -59,6 +59,11 @@ enum SampleFormat avcodec_get_sample_fmt(const char* name);
  */
 const char *avcodec_get_channel_name(int channel_id);
 
+/**
+ * @return channel layout that matches name, 0 if no match
+ */
+int64_t avcodec_get_channel_layout(const char *name);
+
 /**
  * Return description of channel layout
  */

libavcodec/avcodec.h

@@ -30,8 +30,8 @@
 #include "libavutil/avutil.h"
 
 #define LIBAVCODEC_VERSION_MAJOR 52
-#define LIBAVCODEC_VERSION_MINOR 86
-#define LIBAVCODEC_VERSION_MICRO  1
+#define LIBAVCODEC_VERSION_MINOR 87
+#define LIBAVCODEC_VERSION_MICRO  0
 
 #define LIBAVCODEC_VERSION_INT  AV_VERSION_INT(LIBAVCODEC_VERSION_MAJOR, \
                                                LIBAVCODEC_VERSION_MINOR, \