* @return the length of the allocated string, or a negative error code in case of error
* @see av_bprint_escape()
*/
+av_warn_unused_result
int av_escape(char **dst, const char *src, const char *special_chars,
enum AVEscapeMode mode, int flags);
* @return >= 0 in case a sequence was successfully read, a negative
* value in case of invalid sequence
*/
+av_warn_unused_result
int av_utf8_decode(int32_t *codep, const uint8_t **bufp, const uint8_t *buf_end,
unsigned int flags);