Add a function to convert a number to a av_malloced string.

Originally committed as revision 20829 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavutil/avstring.c

@@ -76,3 +76,9 @@ size_t av_strlcatf(char *dst, size_t size, const char *fmt, ...)
 
     return len;
 }
+
+char *av_d2str(double d){
+    char *str= av_malloc(16);
+    if(str) snprintf(str, 16, "%f", d);
+    return str;
+}

libavutil/avstring.h

@@ -22,6 +22,7 @@
 #define AVUTIL_AVSTRING_H
 
 #include <stddef.h>
+#include "mem.h"
 
 /**
  * Return non-zero if pfx is a prefix of str. If it is, *ptr is set to
@@ -95,4 +96,9 @@ size_t av_strlcat(char *dst, const char *src, size_t size);
  */
 size_t av_strlcatf(char *dst, size_t size, const char *fmt, ...);
 
+/**
+ * Convert a number to a av_malloced string.
+ */
+char *av_d2str(double d);
+
 #endif /* AVUTIL_AVSTRING_H */

libavutil/avutil.h

@@ -35,7 +35,7 @@
 #define AV_VERSION(a, b, c) AV_VERSION_DOT(a, b, c)
 
 #define LIBAVUTIL_VERSION_MAJOR 50
-#define LIBAVUTIL_VERSION_MINOR  6
+#define LIBAVUTIL_VERSION_MINOR  7
 #define LIBAVUTIL_VERSION_MICRO  0
 
 #define LIBAVUTIL_VERSION_INT   AV_VERSION_INT(LIBAVUTIL_VERSION_MAJOR, \