af_amerge.c File Reference

#include "libavutil/avstring.h"
#include "libavutil/bprint.h"
#include "libavutil/channel_layout.h"
#include "libavutil/opt.h"
#include "avfilter.h"
#include "filters.h"
#include "audio.h"
#include "internal.h"

Go to the source code of this file.

Data Structures
struct	AMergeContext
struct	AMergeContext::amerge_input

Macros
#define	SWR_CH_MAX   64
#define	OFFSET(x)   offsetof(AMergeContext, x)
#define	FLAGS   AV_OPT_FLAG_AUDIO_PARAM|AV_OPT_FLAG_FILTERING_PARAM

Functions
	AVFILTER_DEFINE_CLASS (amerge)
static av_cold void	uninit (AVFilterContext *ctx)
static int	query_formats (AVFilterContext *ctx)
static int	config_output (AVFilterLink *outlink)
static void	copy_samples (int nb_inputs, struct amerge_input in[], int *route, uint8_t *ins[], uint8_t **outs, int ns, int bps)
	Copy samples from several input streams to one output stream. More...
static void	free_frames (int nb_inputs, AVFrame **input_frames)
static int	try_push_frame (AVFilterContext *ctx, int nb_samples)
static int	activate (AVFilterContext *ctx)
static av_cold int	init (AVFilterContext *ctx)

Variables
static const AVOption	amerge_options []
static const AVFilterPad	amerge_outputs []
AVFilter	ff_af_amerge

Detailed Description

Audio merging filter

Definition in file af_amerge.c.

Macro Definition Documentation

SWR_CH_MAX

#define SWR_CH_MAX   64

Definition at line 35 of file af_amerge.c.

OFFSET

#define OFFSET

(

x

)

offsetof(AMergeContext, x)

Definition at line 47 of file af_amerge.c.

FLAGS

#define FLAGS   AV_OPT_FLAG_AUDIO_PARAM|AV_OPT_FLAG_FILTERING_PARAM

Definition at line 48 of file af_amerge.c.

Function Documentation

AVFILTER_DEFINE_CLASS()

AVFILTER_DEFINE_CLASS

(

amerge

)

uninit()

static av_cold void uninit ( AVFilterContext *  ctx )

static

Definition at line 58 of file af_amerge.c.

query_formats()

static int query_formats ( AVFilterContext *  ctx )

static

Definition at line 70 of file af_amerge.c.

config_output()

static int config_output ( AVFilterLink *  outlink )

static

Definition at line 146 of file af_amerge.c.

copy_samples()

static void copy_samples ( int  nb_inputs, struct amerge_input  in[], int *  route, uint8_t *  ins[], uint8_t **  outs, int  ns, int  bps  )

inlinestatic

Copy samples from several input streams to one output stream.

Parameters

nb_inputs	number of inputs
in	inputs; used only for the nb_ch field;
route	routing values; input channel i goes to output channel route[i]; i < in[0].nb_ch are the channels from the first output; i >= in[0].nb_ch are the channels from the second output
ins	pointer to the samples of each inputs, in packed format; will be left at the end of the copied samples
outs	pointer to the samples of the output, in packet format; must point to a buffer big enough; will be left at the end of the copied samples
ns	number of samples to copy
bps	bytes per sample

Definition at line 194 of file af_amerge.c.

Referenced by try_push_frame().

free_frames()

static void free_frames ( int  nb_inputs, AVFrame **  input_frames  )

static

Definition at line 215 of file af_amerge.c.

Referenced by try_push_frame().

try_push_frame()

static int try_push_frame ( AVFilterContext *  ctx, int  nb_samples  )

static

Definition at line 222 of file af_amerge.c.

Referenced by activate().

activate()

static int activate ( AVFilterContext *  ctx )

static

Definition at line 277 of file af_amerge.c.

init()

static av_cold int init ( AVFilterContext *  ctx )

static

Definition at line 312 of file af_amerge.c.

Variable Documentation

amerge_options

const AVOption amerge_options[]

static

Initial value:

= {
    { "inputs", "specify the number of inputs", OFFSET(nb_inputs),
      AV_OPT_TYPE_INT, { .i64 = 2 }, 1, SWR_CH_MAX, FLAGS },
    { NULL }
}

Definition at line 50 of file af_amerge.c.

amerge_outputs

const AVFilterPad amerge_outputs[]

static

Initial value:

= {
    {
        .name          = "default",
        .type          = AVMEDIA_TYPE_AUDIO,
        .config_props  = config_output,
    },
    { NULL }
}

Definition at line 336 of file af_amerge.c.

ff_af_amerge

AVFilter ff_af_amerge

Initial value:

= {
    .name          = "amerge",
    .description   = NULL_IF_CONFIG_SMALL("Merge two or more audio streams into "
                                          "a single multi-channel stream."),
    .priv_size     = sizeof(AMergeContext),
    .init          = init,
    .uninit        = uninit,
    .query_formats = query_formats,
    .activate      = activate,
    .inputs        = NULL,
    .outputs       = amerge_outputs,
    .priv_class    = &amerge_class,
    .flags         = AVFILTER_FLAG_DYNAMIC_INPUTS,
}

Definition at line 345 of file af_amerge.c.