FFmpeg
 All Data Structures Namespaces Files Functions Variables Typedefs Enumerations Enumerator Macros Groups Pages
Data Structures | Macros | Enumerations | Functions | Variables
af_channelmap.c File Reference

audio channel mapping filter More...

#include <ctype.h>
#include "libavutil/avstring.h"
#include "libavutil/channel_layout.h"
#include "libavutil/common.h"
#include "libavutil/mathematics.h"
#include "libavutil/opt.h"
#include "libavutil/samplefmt.h"
#include "audio.h"
#include "avfilter.h"
#include "formats.h"
#include "internal.h"

Go to the source code of this file.

Data Structures

struct  ChannelMap
 
struct  ChannelMapContext
 

Macros

#define MAX_CH   64
 
#define OFFSET(x)   offsetof(ChannelMapContext, x)
 
#define A   AV_OPT_FLAG_AUDIO_PARAM
 
#define F   AV_OPT_FLAG_FILTERING_PARAM
 

Enumerations

enum  MappingMode {
  MAP_NONE, MAP_ONE_INT, MAP_ONE_STR, MAP_PAIR_INT_INT,
  MAP_PAIR_INT_STR, MAP_PAIR_STR_INT, MAP_PAIR_STR_STR
}
 

Functions

 AVFILTER_DEFINE_CLASS (channelmap)
 
static char * split (char *message, char delim)
 
static int get_channel_idx (char **map, int *ch, char delim, int max_ch)
 
static int get_channel (char **map, uint64_t *ch, char delim)
 
static av_cold int channelmap_init (AVFilterContext *ctx)
 
static int channelmap_query_formats (AVFilterContext *ctx)
 
static int channelmap_filter_frame (AVFilterLink *inlink, AVFrame *buf)
 
static int channelmap_config_input (AVFilterLink *inlink)
 

Variables

static const AVOption channelmap_options []
 
static const AVFilterPad avfilter_af_channelmap_inputs []
 
static const AVFilterPad avfilter_af_channelmap_outputs []
 
AVFilter ff_af_channelmap
 

Detailed Description

audio channel mapping filter

Definition in file af_channelmap.c.

Macro Definition Documentation

#define MAX_CH   64

Definition at line 57 of file af_channelmap.c.

Referenced by channelmap_filter_frame(), and channelmap_init().

#define OFFSET (   x)    offsetof(ChannelMapContext, x)

Definition at line 69 of file af_channelmap.c.

#define A   AV_OPT_FLAG_AUDIO_PARAM

Definition at line 70 of file af_channelmap.c.

Definition at line 71 of file af_channelmap.c.

Enumeration Type Documentation

Enumerator:
MAP_NONE 
MAP_ONE_INT 
MAP_ONE_STR 
MAP_PAIR_INT_INT 
MAP_PAIR_INT_STR 
MAP_PAIR_STR_INT 
MAP_PAIR_STR_STR 

Definition at line 47 of file af_channelmap.c.

Function Documentation

AVFILTER_DEFINE_CLASS ( channelmap  )
static char* split ( char *  message,
char  delim 
)
static
static int get_channel_idx ( char **  map,
int *  ch,
char  delim,
int  max_ch 
)
static

Definition at line 89 of file af_channelmap.c.

Referenced by channelmap_init().

static int get_channel ( char **  map,
uint64_t *  ch,
char  delim 
)
static

Definition at line 108 of file af_channelmap.c.

Referenced by channelmap_init().

static av_cold int channelmap_init ( AVFilterContext ctx)
static

Definition at line 120 of file af_channelmap.c.

static int channelmap_query_formats ( AVFilterContext ctx)
static

Definition at line 289 of file af_channelmap.c.

static int channelmap_filter_frame ( AVFilterLink inlink,
AVFrame buf 
)
static

Definition at line 307 of file af_channelmap.c.

static int channelmap_config_input ( AVFilterLink inlink)
static

Definition at line 354 of file af_channelmap.c.

Variable Documentation

const AVOption channelmap_options[]
static
Initial value:
= {
{ "map", "A comma-separated list of input channel numbers in output order.",
OFFSET(mapping_str), AV_OPT_TYPE_STRING, .flags = A|F },
{ "channel_layout", "Output channel layout.",
OFFSET(channel_layout_str), AV_OPT_TYPE_STRING, .flags = A|F },
{ NULL }
}

Definition at line 72 of file af_channelmap.c.

const AVFilterPad avfilter_af_channelmap_inputs[]
static
Initial value:
= {
{
.name = "default",
.filter_frame = channelmap_filter_frame,
.config_props = channelmap_config_input,
.needs_writable = 1,
},
{ NULL }
}

Definition at line 391 of file af_channelmap.c.

const AVFilterPad avfilter_af_channelmap_outputs[]
static
Initial value:
= {
{
.name = "default",
},
{ NULL }
}

Definition at line 402 of file af_channelmap.c.

AVFilter ff_af_channelmap
Initial value:
= {
.name = "channelmap",
.description = NULL_IF_CONFIG_SMALL("Remap audio channels."),
.init = channelmap_init,
.query_formats = channelmap_query_formats,
.priv_size = sizeof(ChannelMapContext),
.priv_class = &channelmap_class,
}

Definition at line 410 of file af_channelmap.c.