af_channelsplit.c File Reference

Channel split filter. More...

#include "libavutil/channel_layout.h"
#include "libavutil/internal.h"
#include "libavutil/opt.h"
#include "audio.h"
#include "avfilter.h"
#include "formats.h"
#include "internal.h"

Go to the source code of this file.

Data Structures
struct	ChannelSplitContext

Macros
#define	OFFSET(x)   offsetof(ChannelSplitContext, x)
#define	A   AV_OPT_FLAG_AUDIO_PARAM

Typedefs
typedef struct ChannelSplitContext	ChannelSplitContext

Functions
static int	init (AVFilterContext *ctx, const char *arg)
static int	query_formats (AVFilterContext *ctx)
static int	filter_frame (AVFilterLink *inlink, AVFilterBufferRef *buf)

Variables
static const AVOption	options []
static const AVClass	channelsplit_class
static const AVFilterPad	avfilter_af_channelsplit_inputs []
AVFilter	avfilter_af_channelsplit

Detailed Description

Channel split filter.

Split an audio stream into per-channel streams.

Definition in file af_channelsplit.c.

Macro Definition Documentation

#define A   AV_OPT_FLAG_AUDIO_PARAM

Definition at line 43 of file af_channelsplit.c.

#define OFFSET

(

x

)

offsetof(ChannelSplitContext, x)

Definition at line 42 of file af_channelsplit.c.

Typedef Documentation

typedef struct ChannelSplitContext ChannelSplitContext

Function Documentation

static int filter_frame ( AVFilterLink *  inlink, AVFilterBufferRef *  buf  )

static

Definition at line 114 of file af_channelsplit.c.

static int init ( AVFilterContext *  ctx, const char *  arg  )

static

Definition at line 56 of file af_channelsplit.c.

static int query_formats ( AVFilterContext *  ctx )

static

Definition at line 91 of file af_channelsplit.c.

Variable Documentation

AVFilter avfilter_af_channelsplit

Initial value:

= {
    .name           = "channelsplit",
    .description    = NULL_IF_CONFIG_SMALL("Split audio into per-channel streams"),
    .priv_size      = sizeof(ChannelSplitContext),

    .init           = init,
    .query_formats  = query_formats,

    .inputs  = avfilter_af_channelsplit_inputs,
    .outputs = NULL,
}

Definition at line 148 of file af_channelsplit.c.

const AVFilterPad avfilter_af_channelsplit_inputs[]

static

Initial value:

= {
    {
        .name           = "default",
        .type           = AVMEDIA_TYPE_AUDIO,
        .filter_frame   = filter_frame,
    },
    { NULL }
}

Definition at line 139 of file af_channelsplit.c.

const AVClass channelsplit_class

static

Initial value:

= {
    .class_name = "channelsplit filter",
    .item_name  = av_default_item_name,
    .option     = options,
    .version    = LIBAVUTIL_VERSION_INT,
}

Definition at line 49 of file af_channelsplit.c.

Referenced by init().

const AVOption options[]

static

Initial value:

= {
    { "channel_layout", "Input channel layout.", OFFSET(channel_layout_str), AV_OPT_TYPE_STRING, { .str = "stereo" }, .flags = A },
    { NULL },
}

Definition at line 44 of file af_channelsplit.c.