opt.c File Reference

AVOptions. More...

#include "avutil.h"
#include "avassert.h"
#include "avstring.h"
#include "channel_layout.h"
#include "common.h"
#include "dict.h"
#include "eval.h"
#include "log.h"
#include "parseutils.h"
#include "pixdesc.h"
#include "mathematics.h"
#include "opt.h"
#include "samplefmt.h"
#include "bprint.h"
#include <float.h>

Go to the source code of this file.

Macros
#define	DEFAULT_NUMVAL(opt)
#define	OPT_EVAL_NUMBER(name, opttype, vartype)
#define	WHITESPACES   " \n\t\r"

Functions
const AVOption *	av_opt_next (const void *obj, const AVOption *last)
	Iterate over all AVOptions belonging to obj. More...
static int	read_number (const AVOption *o, const 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, void *target_obj, const AVOption *o, const char *val, void *dst)
static int	set_string_image_size (void *obj, const AVOption *o, const char *val, int *dst)
static int	set_string_video_rate (void *obj, const AVOption *o, const char *val, AVRational *dst)
static int	set_string_color (void *obj, const AVOption *o, const char *val, uint8_t *dst)
static const char *	get_bool_name (int val)
static int	set_string_bool (void *obj, const AVOption *o, const char *val, int *dst)
static int	set_string_fmt (void *obj, const AVOption *o, const char *val, uint8_t *dst, int fmt_nb, int((*get_fmt)(const char *)), const char *desc)
static int	set_string_pixel_fmt (void *obj, const AVOption *o, const char *val, uint8_t *dst)
static int	set_string_sample_fmt (void *obj, const AVOption *o, const char *val, uint8_t *dst)
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)
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)
int	av_opt_set_bin (void *obj, const char *name, const uint8_t *val, int len, int search_flags)
int	av_opt_set_image_size (void *obj, const char *name, int w, int h, int search_flags)
int	av_opt_set_video_rate (void *obj, const char *name, AVRational val, int search_flags)
static int	set_format (void *obj, const char *name, int fmt, int search_flags, enum AVOptionType type, const char *desc, int nb_fmts)
int	av_opt_set_pixel_fmt (void *obj, const char *name, enum AVPixelFormat fmt, int search_flags)
int	av_opt_set_sample_fmt (void *obj, const char *name, enum AVSampleFormat fmt, int search_flags)
int	av_opt_set_channel_layout (void *obj, const char *name, int64_t cl, int search_flags)
int	av_opt_set_dict_val (void *obj, const char *name, const AVDictionary *val, int search_flags)
static void	format_duration (char *buf, size_t size, int64_t d)
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)
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_get_image_size (void *obj, const char *name, int search_flags, int *w_out, int *h_out)
int	av_opt_get_video_rate (void *obj, const char *name, int search_flags, AVRational *out_val)
static int	get_format (void *obj, const char *name, int search_flags, int *out_fmt, enum AVOptionType type, const char *desc)
int	av_opt_get_pixel_fmt (void *obj, const char *name, int search_flags, enum AVPixelFormat *out_fmt)
int	av_opt_get_sample_fmt (void *obj, const char *name, int search_flags, enum AVSampleFormat *out_fmt)
int	av_opt_get_channel_layout (void *obj, const char *name, int search_flags, int64_t *cl)
int	av_opt_get_dict_val (void *obj, const char *name, int search_flags, AVDictionary **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. More...
static void	log_value (void *av_log_obj, int level, double d)
static const char *	get_opt_const_name (void *obj, const char *unit, int64_t value)
static char *	get_opt_flags_string (void *obj, const char *unit, int64_t value)
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. More...
void	av_opt_set_defaults (void *s)
	Set the values of all AVOption fields to their default values. More...
void	av_opt_set_defaults2 (void *s, int mask, int flags)
	Set the values of all AVOption fields to their default values. More...
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. More...
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. More...
static int	is_key_char (char c)
static int	get_key (const char **ropts, const char *delim, char **rkey)
	Read a key from a string. More...
int	av_opt_get_key_value (const char **ropts, const char *key_val_sep, const char *pairs_sep, unsigned flags, char **rkey, char **rval)
	Extract a key-value pair from the beginning of a string. More...
int	av_opt_set_from_string (void *ctx, const char *opts, const char *const *shorthand, const char *key_val_sep, const char *pairs_sep)
	Parse the key-value pairs list in opts. More...
void	av_opt_free (void *obj)
	Free all allocated objects in obj. More...
int	av_opt_set_dict2 (void *obj, AVDictionary **options, int search_flags)
	Set all the options from a given dictionary on an object. More...
int	av_opt_set_dict (void *obj, AVDictionary **options)
	Set all the options from a given dictionary on an object. More...
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. More...
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. More...
void *	av_opt_child_next (void *obj, void *prev)
	Iterate over AVOptions-enabled children of obj. More...
const AVClass *	av_opt_child_class_next (const AVClass *parent, const AVClass *prev)
	Iterate over potential AVOptions-enabled children of parent. More...
void *	av_opt_ptr (const AVClass *class, void *obj, const char *name)
	Gets a pointer to the requested field in a struct. More...
static int	opt_size (enum AVOptionType type)
int	av_opt_copy (void *dst, const void *src)
	Copy options from src object into dest object. More...
int	av_opt_query_ranges (AVOptionRanges **ranges_arg, void *obj, const char *key, int flags)
	Get a list of allowed ranges for the given option. More...
int	av_opt_query_ranges_default (AVOptionRanges **ranges_arg, void *obj, const char *key, int flags)
	Get a default list of allowed ranges for the given option. More...
void	av_opt_freep_ranges (AVOptionRanges **rangesp)
	Free an AVOptionRanges struct and set it to NULL. More...
int	av_opt_is_set_to_default (void *obj, const AVOption *o)
	Check if given option is set to its default value. More...
int	av_opt_is_set_to_default_by_name (void *obj, const char *name, int search_flags)
	Check if given option is set to its default value. More...
int	av_opt_serialize (void *obj, int opt_flags, int flags, char **buffer, const char key_val_sep, const char pairs_sep)
	Serialize object's options. More...

Detailed Description

AVOptions.

Author

Michael Niedermayer micha.nosp@m.elni.nosp@m.@gmx..nosp@m.at

Definition in file opt.c.

Macro Definition Documentation

#define DEFAULT_NUMVAL

(

opt

)

Value:

((opt->type == AV_OPT_TYPE_INT64 || \
                              opt->type == AV_OPT_TYPE_CONST || \
                              opt->type == AV_OPT_TYPE_FLAGS || \
                              opt->type == AV_OPT_TYPE_INT)     \
                             ? opt->default_val.i64             \
                             : opt->default_val.dbl)

Definition at line 202 of file opt.c.

Referenced by set_string_number().

#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 || o->flags & AV_OPT_FLAG_READONLY)    \
        return AVERROR(EINVAL);                                         \
    return set_string_number(obj, obj, o, val, name ## _out);           \
}

Definition at line 507 of file opt.c.

#define WHITESPACES   " \n\t\r"

Definition at line 1404 of file opt.c.

Referenced by get_key().

Function Documentation

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

static

Definition at line 58 of file opt.c.

Referenced by av_opt_is_set_to_default(), get_number(), and set_string_number().

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

static

Definition at line 96 of file opt.c.

Referenced by av_opt_set(), av_opt_set_defaults2(), set_number(), and set_string_number().

static int hexchar2int ( char  c )

static

Definition at line 151 of file opt.c.

Referenced by set_string_binary().

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

static

Definition at line 161 of file opt.c.

Referenced by av_opt_is_set_to_default(), av_opt_set(), and av_opt_set_defaults2().

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

static

Definition at line 195 of file opt.c.

Referenced by av_opt_set(), and av_opt_set_defaults2().

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

static

Definition at line 209 of file opt.c.

Referenced by av_opt_set().

static int set_string_image_size ( void *  obj, const AVOption *  o, const char *  val, int *  dst  )

static

Definition at line 298 of file opt.c.

Referenced by av_opt_set(), and av_opt_set_defaults2().

static int set_string_video_rate ( void *  obj, const AVOption *  o, const char *  val, AVRational *  dst  )

static

Definition at line 313 of file opt.c.

Referenced by av_opt_set(), and av_opt_set_defaults2().

static int set_string_color ( void *  obj, const AVOption *  o, const char *  val, uint8_t *  dst  )

static

Definition at line 326 of file opt.c.

Referenced by av_opt_set(), and av_opt_set_defaults2().

static const char* get_bool_name ( int  val )

static

Definition at line 341 of file opt.c.

Referenced by av_opt_get(), and opt_list().

static int set_string_bool ( void *  obj, const AVOption *  o, const char *  val, int *  dst  )

static

Definition at line 348 of file opt.c.

Referenced by av_opt_set().

static int set_string_fmt ( void *  obj, const AVOption *  o, const char *  val, uint8_t *  dst, int  fmt_nb, int((*get_fmt)(const char *))  , const char *  desc  )

static

Definition at line 379 of file opt.c.

Referenced by set_string_pixel_fmt(), and set_string_sample_fmt().

static int set_string_pixel_fmt ( void *  obj, const AVOption *  o, const char *  val, uint8_t *  dst  )

static

Definition at line 419 of file opt.c.

Referenced by av_opt_set().

static int set_string_sample_fmt ( void *  obj, const AVOption *  o, const char *  val, uint8_t *  dst  )

static

Definition at line 425 of file opt.c.

Referenced by av_opt_set().

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

static

Definition at line 523 of file opt.c.

Referenced by av_opt_set_double(), av_opt_set_int(), av_opt_set_q(), and av_opt_set_video_rate().

static int set_format ( void *  obj, const char *  name, int  fmt, int  search_flags, enum AVOptionType  type, const char *  desc, int  nb_fmts  )

static

Definition at line 623 of file opt.c.

Referenced by av_opt_set_pixel_fmt(), av_opt_set_sample_fmt(), and dshow_cycle_pins().

static void format_duration ( char *  buf, size_t  size, int64_t  d  )

static

Definition at line 697 of file opt.c.

Referenced by av_opt_get(), and opt_list().

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 833 of file opt.c.

Referenced by av_opt_get_double(), av_opt_get_int(), av_opt_get_q(), and av_opt_get_video_rate().

static int get_format ( void *  obj, const char *  name, int  search_flags, int *  out_fmt, enum AVOptionType  type, const char *  desc  )

static

Definition at line 927 of file opt.c.

Referenced by av_opt_get_pixel_fmt(), and av_opt_get_sample_fmt().

static void log_value ( void *  av_log_obj, int  level, double  d  )

static

Definition at line 1002 of file opt.c.

Referenced by opt_list().

static const char* get_opt_const_name ( void *  obj, const char *  unit, int64_t  value  )

static

Definition at line 1035 of file opt.c.

Referenced by opt_list().

static char* get_opt_flags_string ( void *  obj, const char *  unit, int64_t  value  )

static

Definition at line 1048 of file opt.c.

Referenced by opt_list().

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

static

Definition at line 1069 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 1350 of file opt.c.

Referenced by av_set_options_string().

static int is_key_char ( char  c )

static

Definition at line 1406 of file opt.c.

Referenced by get_key().

static int get_key ( const char **  ropts, const char *  delim, char **  rkey  )

static

Read a key from a string.

The key consists of is_key_char characters and must be terminated by a character from the delim string; spaces are ignored.

Returns

0 for success (even with ellipsis), <0 for failure

Definition at line 1421 of file opt.c.

Referenced by av_opt_get_key_value().

static int opt_size ( enum AVOptionType  type )

static

Definition at line 1639 of file opt.c.

Referenced by av_opt_copy(), and av_opt_is_set_to_default().