af_join.c File Reference

Audio join filter. More...

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

Go to the source code of this file.

Data Structures
struct	ChannelMap
struct	JoinContext
struct	ChannelList

Macros
#define	OFFSET(x)
#define	A   AV_OPT_FLAG_AUDIO_PARAM
#define	F   AV_OPT_FLAG_FILTERING_PARAM
#define	MAP_SEPARATOR   '|'

Functions
	AVFILTER_DEFINE_CLASS (join)
static int	parse_maps (AVFilterContext *ctx)
static av_cold int	join_init (AVFilterContext *ctx)
static av_cold void	join_uninit (AVFilterContext *ctx)
static int	join_query_formats (const AVFilterContext *ctx, AVFilterFormatsConfig **cfg_in, AVFilterFormatsConfig **cfg_out)
static enum AVChannel	channel_list_pop (ChannelList *chl, int idx)
static enum AVChannel	channel_list_pop_ch (ChannelList *chl, enum AVChannel ch)
static void	guess_map_matching (AVFilterContext *ctx, ChannelMap *ch, ChannelList *inputs)
static void	guess_map_any (AVFilterContext *ctx, ChannelMap *ch, ChannelList *inputs)
static int	join_config_output (AVFilterLink *outlink)
static int	try_push_frame (AVFilterContext *ctx)
static int	activate (AVFilterContext *ctx)

Variables
static const AVOption	join_options []
static const AVFilterPad	avfilter_af_join_outputs []
const FFFilter	ff_af_join

Detailed Description

Audio join filter.

Join multiple audio inputs as different channels in a single output

Definition in file af_join.c.

Macro Definition Documentation

OFFSET

#define OFFSET

(

x

)

Value:

offsetof(JoinContext, x)

Definition at line 69 of file af_join.c.

A

#define A   AV_OPT_FLAG_AUDIO_PARAM

Definition at line 70 of file af_join.c.

F

#define F   AV_OPT_FLAG_FILTERING_PARAM

Definition at line 71 of file af_join.c.

MAP_SEPARATOR

#define MAP_SEPARATOR   '|'

Definition at line 82 of file af_join.c.

Referenced by parse_maps().

Function Documentation

AVFILTER_DEFINE_CLASS()

AVFILTER_DEFINE_CLASS

(

join

)

parse_maps()

static int parse_maps ( AVFilterContext * ctx )

static

Definition at line 86 of file af_join.c.

Referenced by join_init().

join_init()

static av_cold int join_init ( AVFilterContext * ctx )

static

Definition at line 154 of file af_join.c.

join_uninit()

static av_cold void join_uninit ( AVFilterContext * ctx )

static

Definition at line 190 of file af_join.c.

join_query_formats()

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

static

Definition at line 204 of file af_join.c.

channel_list_pop()

static enum AVChannel channel_list_pop ( ChannelList * chl, int idx )

static

Definition at line 233 of file af_join.c.

Referenced by channel_list_pop_ch(), and guess_map_any().

channel_list_pop_ch()

static enum AVChannel channel_list_pop_ch ( ChannelList * chl, enum AVChannel ch )

static

Definition at line 246 of file af_join.c.

Referenced by guess_map_matching(), and join_config_output().

guess_map_matching()

static void guess_map_matching ( AVFilterContext * ctx, ChannelMap * ch, ChannelList * inputs )

static

Definition at line 254 of file af_join.c.

Referenced by join_config_output().

guess_map_any()

static void guess_map_any ( AVFilterContext * ctx, ChannelMap * ch, ChannelList * inputs )

static

Definition at line 268 of file af_join.c.

Referenced by join_config_output().

join_config_output()

static int join_config_output ( AVFilterLink * outlink )

static

Definition at line 282 of file af_join.c.

try_push_frame()

static int try_push_frame ( AVFilterContext * ctx )

static

Definition at line 419 of file af_join.c.

Referenced by activate().

activate()

static int activate ( AVFilterContext * ctx )

static

Definition at line 545 of file af_join.c.

Variable Documentation

join_options

const AVOption join_options[]

static

Initial value:

= {
    { "inputs",         "Number of input streams.", OFFSET(inputs),             AV_OPT_TYPE_INT,    { .i64 = 2 }, 1, INT_MAX,       A|F },
    { "channel_layout", "Channel layout of the "
                        "output stream.",           OFFSET(ch_layout),          AV_OPT_TYPE_CHLAYOUT, {.str = "stereo"}, 0, 0, A|F },
    { "map",            "A comma-separated list of channels maps in the format "
                        "'input_stream.input_channel-output_channel.",
                                                    OFFSET(map),                AV_OPT_TYPE_STRING,                 .flags = A|F },
    { NULL }
}

Definition at line 72 of file af_join.c.

avfilter_af_join_outputs

const AVFilterPad avfilter_af_join_outputs[]

static

Initial value:

= {
    {
        .name          = "default",
        .type          = AVMEDIA_TYPE_AUDIO,
        .config_props  = join_config_output,
    },
}

Definition at line 590 of file af_join.c.

ff_af_join

const FFFilter ff_af_join

Initial value:

= {
    .p.name         = "join",
    .p.description  = NULL_IF_CONFIG_SMALL("Join multiple audio streams into "
                                           "multi-channel output."),
    .p.priv_class   = &join_class,
    .p.flags        = AVFILTER_FLAG_DYNAMIC_INPUTS,
    .priv_size      = sizeof(JoinContext),
    .init           = join_init,
    .uninit         = join_uninit,
    .activate       = activate,
    FILTER_OUTPUTS(avfilter_af_join_outputs),
    FILTER_QUERY_FUNC2(join_query_formats),
}

Definition at line 598 of file af_join.c.