opt.h

dianzi shuju ,tai badao le ,my tian li a a

#ifndef AVOPT_H
#define AVOPT_H

enum AVOptionType{
    FF_OPT_TYPE_FLAGS,
    FF_OPT_TYPE_INT,
    FF_OPT_TYPE_INT64,
    FF_OPT_TYPE_DOUBLE,
    FF_OPT_TYPE_FLOAT,
    FF_OPT_TYPE_STRING,
    FF_OPT_TYPE_RATIONAL,
    FF_OPT_TYPE_CONST=128,
};

typedef struct AVOption {
    const char *name;

    const char *help;
    int offset;
    enum AVOptionType type;

    double default_val;
    double min;
    double max;

    int flags;
#define AV_OPT_FLAG_ENCODING_PARAM  1
#define AV_OPT_FLAG_DECODING_PARAM  2
#define AV_OPT_FLAG_METADATA        4
#define AV_OPT_FLAG_AUDIO_PARAM     8
#define AV_OPT_FLAG_VIDEO_PARAM     16
#define AV_OPT_FLAG_SUBTITLE_PARAM  32
    const char *unit;
} AVOption;


AVOption *av_set_string(void *obj, const char *name, const char *val);
AVOption *av_set_double(void *obj, const char *name, double n);
AVOption *av_set_q(void *obj, const char *name, AVRational n);
AVOption *av_set_int(void *obj, const char *name, int64_t n);
double av_get_double(void *obj, const char *name, AVOption **o_out);
AVRational av_get_q(void *obj, const char *name, AVOption **o_out);
int64_t av_get_int(void *obj, const char *name, AVOption **o_out);
const char *av_get_string(void *obj, const char *name, AVOption **o_out, char *buf, int buf_len);
AVOption *av_next_option(void *obj, AVOption *last);
int av_opt_show(void *obj, void *av_log_obj);
void av_opt_set_defaults(void *s);

#endif