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/mem.h"
#include "libavutil/opt.h"
#include "libavutil/samplefmt.h"
#include "audio.h"
#include "avfilter.h"
#include "filters.h"
#include "formats.h"

Go to the source code of this file.

Data Structures
struct	ChannelMap
struct	ChannelMapContext

Macros
#define	OFFSET(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 void	channelmap_uninit (AVFilterContext *ctx)
static char *	split (char *message, char delim)
static int	get_channel_idx (char **map, int *ch, char delim)
static int	get_channel (char **map, int *ch, char delim)
static int	check_idx_and_id (AVFilterContext *ctx, int channel_idx, int channel, AVChannelLayout *ch_layout, const char *io)
static av_cold int	channelmap_init (AVFilterContext *ctx)
static int	channelmap_query_formats (const AVFilterContext *ctx, AVFilterFormatsConfig **cfg_in, AVFilterFormatsConfig **cfg_out)
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 []
const FFFilter	ff_af_channelmap

Detailed Description

audio channel mapping filter

Definition in file af_channelmap.c.

Macro Definition Documentation

OFFSET

#define OFFSET

(

x

)

Value:

offsetof(ChannelMapContext, x)

Definition at line 69 of file af_channelmap.c.

A

#define A   AV_OPT_FLAG_AUDIO_PARAM

Definition at line 70 of file af_channelmap.c.

F

#define F   AV_OPT_FLAG_FILTERING_PARAM

Definition at line 71 of file af_channelmap.c.

Enumeration Type Documentation

MappingMode

enum MappingMode

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 48 of file af_channelmap.c.

Function Documentation

AVFILTER_DEFINE_CLASS()

AVFILTER_DEFINE_CLASS

(

channelmap

)

channelmap_uninit()

static void channelmap_uninit ( AVFilterContext * ctx )

static

Definition at line 82 of file af_channelmap.c.

split()

static char * split ( char * message, char delim )

static

Definition at line 89 of file af_channelmap.c.

Referenced by arith2_get_scaled_value(), arith2_rescale_interval(), av1_frame_split_filter(), AVFILTER_DEFINE_CLASS_EXT(), can_split(), cbs_vp8_bool_decoder_read_bool(), decode_cu_r(), decode_filter(), derive_mode_type_condition(), dirac_unpack_block_motion_data(), encode_block(), get_channel(), get_channel_idx(), handle_file(), hls_coding_tree(), intra_prediction_unit(), main(), mode_type_decode(), mss4_decode_image_block(), output_client_manifest(), quant_band_template(), read_hybrid_uint(), read_mfra(), write_fragments(), and wv_unpack_dsd_high().

get_channel_idx()

static int get_channel_idx ( char ** map, int * ch, char delim )

static

Definition at line 96 of file af_channelmap.c.

Referenced by channelmap_init().

get_channel()

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

static

Definition at line 116 of file af_channelmap.c.

Referenced by channelmap_init().

check_idx_and_id()

static int check_idx_and_id ( AVFilterContext * ctx, int channel_idx, int channel, AVChannelLayout * ch_layout, const char * io )

static

Definition at line 128 of file af_channelmap.c.

Referenced by channelmap_config_input(), and channelmap_init().

channelmap_init()

static av_cold int channelmap_init ( AVFilterContext * ctx )

static

Definition at line 152 of file af_channelmap.c.

channelmap_query_formats()

static int channelmap_query_formats ( const AVFilterContext * ctx, AVFilterFormatsConfig ** cfg_in, AVFilterFormatsConfig ** cfg_out )

static

Definition at line 340 of file af_channelmap.c.

channelmap_filter_frame()

static int channelmap_filter_frame ( AVFilterLink * inlink, AVFrame * buf )

static

Definition at line 364 of file af_channelmap.c.

channelmap_config_input()

static int channelmap_config_input ( AVFilterLink * inlink )

static

Definition at line 411 of file af_channelmap.c.

Variable Documentation

channelmap_options

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(output_layout),      AV_OPT_TYPE_CHLAYOUT, .flags = A|F },
    { NULL }
}

Definition at line 72 of file af_channelmap.c.

avfilter_af_channelmap_inputs

const AVFilterPad avfilter_af_channelmap_inputs[]

static

Initial value:

= {
    {
        .name           = "default",
        .type           = AVMEDIA_TYPE_AUDIO,
        .flags          = AVFILTERPAD_FLAG_NEEDS_WRITABLE,
        .filter_frame   = channelmap_filter_frame,
        .config_props   = channelmap_config_input,
    },
}

Definition at line 438 of file af_channelmap.c.

ff_af_channelmap

const FFFilter ff_af_channelmap

Initial value:

= {
    .p.name        = "channelmap",
    .p.description = NULL_IF_CONFIG_SMALL("Remap audio channels."),
    .p.priv_class  = &channelmap_class,
    .init          = channelmap_init,
    .uninit        = channelmap_uninit,
    .priv_size     = sizeof(ChannelMapContext),
    FILTER_INPUTS(avfilter_af_channelmap_inputs),
    FILTER_OUTPUTS(ff_audio_default_filterpad),
    FILTER_QUERY_FUNC2(channelmap_query_formats),
}

Definition at line 448 of file af_channelmap.c.