17 FF_OPT_TYPE_CONST=128,
23 typedef struct AVOption {
27 * short English text help.
28 * @fixme what about other languages
31 int offset; ///< offset to context structure where the parsed value should be stored
32 enum AVOptionType type;
39 #define AV_OPT_FLAG_ENCODING_PARAM 1 ///< a generic parameter which can be set by the user for muxing or encoding
40 #define AV_OPT_FLAG_DECODING_PARAM 2 ///< a generic parameter which can be set by the user for demuxing or decoding
41 #define AV_OPT_FLAG_METADATA 4 ///< some data extracted or inserted into the file like title, comment, ...
42 #define AV_OPT_FLAG_AUDIO_PARAM 8
43 #define AV_OPT_FLAG_VIDEO_PARAM 16
44 #define AV_OPT_FLAG_SUBTITLE_PARAM 32
45 //FIXME think about enc-audio, ... style flags
50 AVOption *av_set_string(void *obj, const char *name, const char *val);
51 AVOption *av_set_double(void *obj, const char *name, double n);
52 AVOption *av_set_q(void *obj, const char *name, AVRational n);
53 AVOption *av_set_int(void *obj, const char *name, int64_t n);
54 double av_get_double(void *obj, const char *name, AVOption **o_out);
55 AVRational av_get_q(void *obj, const char *name, AVOption **o_out);
56 int64_t av_get_int(void *obj, const char *name, AVOption **o_out);
57 const char *av_get_string(void *obj, const char *name, AVOption **o_out, char *buf, int buf_len);
58 AVOption *av_next_option(void *obj, AVOption *last);
59 int av_opt_show(void *obj, void *av_log_obj);