av_string: add av_asprintf().

1 files changed, 10 insertions, 0 deletions

diff --git a/libavutil/avstring.h b/libavutil/avstring.h
index 662af6b70d..2be84a9ed0 100644
--- a/libavutil/avstring.h
+++ b/libavutil/avstring.h
@@ -111,6 +111,16 @@ size_t av_strlcat(char *dst, const char *src, size_t size);
 size_t av_strlcatf(char *dst, size_t size, const char *fmt, ...) av_printf_format(3, 4);
 
 /**
+ * Print arguments following specified format into a large enough auto
+ * allocated buffer. It is similar to GNU asprintf().
+ * @param fmt printf-compatible format string, specifying how the
+ *            following parameters are used.
+ * @return the allocated string
+ * @note You have to free the string yourself with av_free().
+ */
+char *av_asprintf(const char *fmt, ...) av_printf_format(1, 2);
+
+/**
  * Convert a number to a av_malloced string.
  */
 char *av_d2str(double d);