ff_subtitles_read_line 45 libavformat/srtdec.c if (ff_subtitles_read_line(&tr, buf, sizeof(buf)) < 0 || ff_subtitles_read_line 50 libavformat/srtdec.c if (ff_subtitles_read_line(&tr, buf, sizeof(buf)) < 0) ff_subtitles_read_line 208 libavformat/subtitles.h ptrdiff_t ff_subtitles_read_line(FFTextReader *tr, char *buf, size_t size);