libavutil/opt.c File Reference

AVOptions. More...

#include "avutil.h"
#include "avstring.h"
#include "opt.h"
#include "eval.h"
#include "dict.h"
#include "log.h"

Go to the source code of this file.

Defines

#define OPT_EVAL_NUMBER(name, opttype, vartype)

Functions

const AVOption * av_find_opt (void *v, const char *name, const char *unit, int mask, int flags)
 Look for an option in obj.
const AVOption * av_next_option (void *obj, const AVOption *last)
const AVOption * av_opt_next (void *obj, const AVOption *last)
 Iterate over all AVOptions belonging to obj.
static int read_number (const AVOption *o, void *dst, double *num, int *den, int64_t *intnum)
static int write_number (void *obj, const AVOption *o, void *dst, double num, int den, int64_t intnum)
static int hexchar2int (char c)
static int set_string_binary (void *obj, const AVOption *o, const char *val, uint8_t **dst)
static int set_string (void *obj, const AVOption *o, const char *val, uint8_t **dst)
static int set_string_number (void *obj, const AVOption *o, const char *val, void *dst)
int av_set_string3 (void *obj, const char *name, const char *val, int alloc, const AVOption **o_out)
 Set the field of obj with the given name to value.
int av_opt_set (void *obj, const char *name, const char *val, int search_flags)
static int set_number (void *obj, const char *name, double num, int den, int64_t intnum, int search_flags)
const AVOption * av_set_double (void *obj, const char *name, double n)
const AVOption * av_set_q (void *obj, const char *name, AVRational n)
const AVOption * av_set_int (void *obj, const char *name, int64_t n)
int av_opt_set_int (void *obj, const char *name, int64_t val, int search_flags)
int av_opt_set_double (void *obj, const char *name, double val, int search_flags)
int av_opt_set_q (void *obj, const char *name, AVRational val, int search_flags)
const char * av_get_string (void *obj, const char *name, const AVOption **o_out, char *buf, int buf_len)
int av_opt_get (void *obj, const char *name, int search_flags, uint8_t **out_val)
static int get_number (void *obj, const char *name, const AVOption **o_out, double *num, int *den, int64_t *intnum, int search_flags)
double av_get_double (void *obj, const char *name, const AVOption **o_out)
AVRational av_get_q (void *obj, const char *name, const AVOption **o_out)
int64_t av_get_int (void *obj, const char *name, const AVOption **o_out)
int av_opt_get_int (void *obj, const char *name, int search_flags, int64_t *out_val)
int av_opt_get_double (void *obj, const char *name, int search_flags, double *out_val)
int av_opt_get_q (void *obj, const char *name, int search_flags, AVRational *out_val)
int av_opt_flag_is_set (void *obj, const char *field_name, const char *flag_name)
 Check whether a particular flag is set in a flags field.
static void opt_list (void *obj, void *av_log_obj, const char *unit, int req_flags, int rej_flags)
int av_opt_show2 (void *obj, void *av_log_obj, int req_flags, int rej_flags)
 Show the obj options.
void av_opt_set_defaults (void *s)
 Set the values of all AVOption fields to their default values.
void av_opt_set_defaults2 (void *s, int mask, int flags)
static int parse_key_value_pair (void *ctx, const char **buf, const char *key_val_sep, const char *pairs_sep)
 Store the value in the field in ctx that is named like key.
int av_set_options_string (void *ctx, const char *opts, const char *key_val_sep, const char *pairs_sep)
 Parse the key/value pairs list in opts.
void av_opt_free (void *obj)
 Free all string and binary options in obj.
int av_opt_set_dict (void *obj, AVDictionary **options)
const AVOption * av_opt_find (void *obj, const char *name, const char *unit, int opt_flags, int search_flags)
 Look for an option in an object.
const AVOption * av_opt_find2 (void *obj, const char *name, const char *unit, int opt_flags, int search_flags, void **target_obj)
 Look for an option in an object.
void * av_opt_child_next (void *obj, void *prev)
 Iterate over AVOptions-enabled children of obj.
const AVClass * av_opt_child_class_next (const AVClass *parent, const AVClass *prev)
 Iterate over potential AVOptions-enabled children of parent.
void * av_opt_ptr (const AVClass *class, void *obj, const char *name)
 Gets a pointer to the requested field in a struct.

Variables

static const double const_values []
static const char *const const_names []

Detailed Description

AVOptions.

Author:
Michael Niedermayer <michaelni@gmx.at>

Definition in file opt.c.

Define Documentation

#define OPT_EVAL_NUMBER ( name,
opttype,
vartype   ) 

Value:

int av_opt_eval_ ## name(void *obj, const AVOption *o, const char *val, vartype *name ## _out)\
    {\
        if (!o || o->type != opttype)\
            return AVERROR(EINVAL);\
        return set_string_number(obj, o, val, name ## _out);\
    }

Definition at line 250 of file opt.c.

Function Documentation

static int get_number ( void *  obj,
const char *  name,
const AVOption **  o_out,
double *  num,
int *  den,
int64_t *  intnum,
int  search_flags 
) [static]

Definition at line 407 of file opt.c.

Referenced by av_get_double(), av_get_int(), av_get_q(), av_opt_get_double(), av_opt_get_int(), and av_opt_get_q().

static int hexchar2int ( char  c  )  [static]

Definition at line 117 of file opt.c.

Referenced by set_string_binary().

static void opt_list ( void *  obj,
void *  av_log_obj,
const char *  unit,
int  req_flags,
int  rej_flags 
) [static]

Definition at line 517 of file opt.c.

Referenced by av_opt_show2().

static int parse_key_value_pair ( void *  ctx,
const char **  buf,
const char *  key_val_sep,
const char *  pairs_sep 
) [static]

Store the value in the field in ctx that is named like key.

ctx must be an AVClass context, storing is done using AVOptions.

Parameters:
buf the string to parse, buf will be updated to point at the separator just after the parsed key/value pair
key_val_sep a 0-terminated list of characters used to separate key from value
pairs_sep a 0-terminated list of characters used to separate two pairs from each other
Returns:
0 if the key/value pair has been successfully parsed and set, or a negative value corresponding to an AVERROR code in case of error: AVERROR(EINVAL) if the key/value pair cannot be parsed, the error code issued by av_opt_set() if the key/value pair cannot be set

Definition at line 671 of file opt.c.

Referenced by av_set_options_string().

static int read_number ( const AVOption *  o,
void *  dst,
double *  num,
int *  den,
int64_t *  intnum 
) [static]

Definition at line 64 of file opt.c.

Referenced by get_number(), and set_string_number().

static int set_number ( void *  obj,
const char *  name,
double  num,
int  den,
int64_t  intnum,
int  search_flags 
) [static]

Definition at line 265 of file opt.c.

Referenced by av_opt_set_double(), av_opt_set_int(), av_opt_set_q(), av_set_double(), av_set_int(), and av_set_q().

static int set_string ( void *  obj,
const AVOption *  o,
const char *  val,
uint8_t **  dst 
) [static]

Definition at line 153 of file opt.c.

Referenced by av_opt_set().

static int set_string_binary ( void *  obj,
const AVOption *  o,
const char *  val,
uint8_t **  dst 
) [static]

Definition at line 124 of file opt.c.

Referenced by av_opt_set().

static int set_string_number ( void *  obj,
const AVOption *  o,
const char *  val,
void *  dst 
) [static]

Definition at line 160 of file opt.c.

Referenced by av_opt_set().

static int write_number ( void *  obj,
const AVOption *  o,
void *  dst,
double  num,
int  den,
int64_t  intnum 
) [static]

Definition at line 80 of file opt.c.

Referenced by set_number(), and set_string_number().

Variable Documentation

const char* const const_names[] [static]

Initial value:

 {
    "PI",
    "E",
    "QP2LAMBDA",
    0
}

Definition at line 110 of file opt.c.

Referenced by config(), ff_rate_control_init(), set_string_number(), and vf_open().

const double const_values[] [static]

Initial value:

 {
    M_PI,
    M_E,
    FF_QP2LAMBDA,
    0
}

Definition at line 103 of file opt.c.

Referenced by config(), get_qscale(), put_image(), and set_string_number().

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