af_join.c File Reference

Audio join filter. More...

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

Classes
struct	ChannelMap
struct	JoinContext

Macros
#define	OFFSET(x)   offsetof(JoinContext, x)
#define	A   AV_OPT_FLAG_AUDIO_PARAM
#define	F   AV_OPT_FLAG_FILTERING_PARAM
#define	PARSE_CHANNEL(str, var, inout)

Typedefs
typedef struct ChannelMap	ChannelMap
typedef struct JoinContext	JoinContext

Functions
	AVFILTER_DEFINE_CLASS (join)

Variables
AVFilter	ff_af_join

Detailed Description

Audio join filter.

Join multiple audio inputs as different channels in a single output

Macro Definition Documentation

PARSE_CHANNEL

#define PARSE_CHANNEL	(		str,
			var,
			inout
	)

Value:

if (!(var = av_get_channel_layout(str))) {                             \
            av_log(ctx, AV_LOG_ERROR, "Invalid " inout " channel: %s.\n", str);\
            return AVERROR(EINVAL);                                            \
        }                                                                      \
        if (av_get_channel_layout_nb_channels(var) != 1) {                     \
            av_log(ctx, AV_LOG_ERROR, "Channel map describes more than one "   \
                   inout " channel.\n");                                       \
            return AVERROR(EINVAL);                                            \
        }

Variable Documentation

ff_af_join

AVFilter ff_af_join

Initial value:

= {
    .name           = "join",
    .description    = NULL_IF_CONFIG_SMALL("Join multiple audio streams into "
                                           "multi-channel output."),
    .priv_size      = sizeof(JoinContext),
    .priv_class     = &join_class,
    .init           = join_init,
    .uninit         = join_uninit,
    .activate       = activate,
    .query_formats  = join_query_formats,
    .inputs         = NULL,
    .outputs        = avfilter_af_join_outputs,
    .flags          = AVFILTER_FLAG_DYNAMIC_INPUTS,
}