FFmpeg
Data Fields
AVOptionRanges Struct Reference

List of AVOptionRange structs. More...

#include <opt.h>

Data Fields

AVOptionRange ** range
 Array of option ranges. More...
 
int nb_ranges
 Number of ranges per component. More...
 
int nb_components
 Number of componentes. More...
 

Detailed Description

List of AVOptionRange structs.

Definition at line 333 of file opt.h.

Field Documentation

◆ range

AVOptionRange** AVOptionRanges::range

Array of option ranges.

Most of option types use just one component. Following describes multi-component option types:

AV_OPT_TYPE_IMAGE_SIZE: component index 0: range of pixel count (width * height). component index 1: range of width. component index 2: range of height.

Note
To obtain multi-component version of this structure, user must provide AV_OPT_MULTI_COMPONENT_RANGE to av_opt_query_ranges or av_opt_query_ranges_default function.

Multi-component range can be read as in following example:

int range_index, component_index;
AVOptionRange *range[3]; //may require more than 3 in the future.
for (range_index = 0; range_index < ranges->nb_ranges; range_index++) {
for (component_index = 0; component_index < ranges->nb_components; component_index++)
range[component_index] = ranges->range[ranges->nb_ranges * component_index + range_index];
//do something with range here.
}

Definition at line 364 of file opt.h.

Referenced by av_opt_freep_ranges(), and av_opt_query_ranges_default().

◆ nb_ranges

int AVOptionRanges::nb_ranges

Number of ranges per component.

Definition at line 368 of file opt.h.

Referenced by av_opt_freep_ranges(), and av_opt_query_ranges_default().

◆ nb_components

int AVOptionRanges::nb_components

Number of componentes.

Definition at line 372 of file opt.h.

Referenced by av_opt_freep_ranges(), and av_opt_query_ranges_default().


The documentation for this struct was generated from the following file:
AVOptionRanges::nb_components
int nb_components
Number of componentes.
Definition: opt.h:372
AVOptionRanges::nb_ranges
int nb_ranges
Number of ranges per component.
Definition: opt.h:368
key
const char * key
Definition: hwcontext_opencl.c:168
AVOptionRanges::range
AVOptionRange ** range
Array of option ranges.
Definition: opt.h:364
AVOptionRange
A single allowed range of values, or a single allowed value.
Definition: opt.h:310
AV_OPT_MULTI_COMPONENT_RANGE
#define AV_OPT_MULTI_COMPONENT_RANGE
Allows av_opt_query_ranges and av_opt_query_ranges_default to return more than one component for cert...
Definition: opt.h:581
AVOptionRanges
List of AVOptionRange structs.
Definition: opt.h:333
av_opt_query_ranges
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.
Definition: opt.c:1827
av_opt_freep_ranges
void av_opt_freep_ranges(AVOptionRanges **rangesp)
Free an AVOptionRanges struct and set it to NULL.
Definition: opt.c:1920