-void ff_hls_write_audio_rendition(AVIOContext *out, char *agroup,
- char *filename, char *language, int name_id, int is_default);
-void ff_hls_write_stream_info(AVStream *st, AVIOContext *out,
- int bandwidth, char *filename, char *agroup,
- char *codecs, char *ccgroup);
+void ff_hls_write_audio_rendition(AVIOContext *out, const char *agroup,
+ const char *filename, const char *language,
+ int name_id, int is_default);
+void ff_hls_write_subtitle_rendition(AVIOContext *out, const char *sgroup,
+ const char *filename, const char *language,
+ int name_id, int is_default);
+void ff_hls_write_stream_info(AVStream *st, AVIOContext *out, int bandwidth,
+ const char *filename, const char *agroup,
+ const char *codecs, const char *ccgroup,
+ const char *sgroup);