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af_amerge.c File Reference

Audio merging filter. More...

#include "libavutil/avstring.h"
#include "libavutil/bprint.h"
#include "libavutil/channel_layout.h"
#include "libavutil/opt.h"
#include "avfilter.h"
#include "audio.h"
#include "bufferqueue.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 int request_frame (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 int filter_frame (AVFilterLink *inlink, AVFrame *insamples)
 
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

#define SWR_CH_MAX   64
#define OFFSET (   x)    offsetof(AMergeContext, x)

Definition at line 50 of file af_amerge.c.

Definition at line 51 of file af_amerge.c.

Function Documentation

AVFILTER_DEFINE_CLASS ( amerge  )
static av_cold void uninit ( AVFilterContext ctx)
static

Definition at line 61 of file af_amerge.c.

static int query_formats ( AVFilterContext ctx)
static

Definition at line 75 of file af_amerge.c.

static int config_output ( AVFilterLink outlink)
static

Definition at line 146 of file af_amerge.c.

static int request_frame ( AVFilterLink outlink)
static

Definition at line 178 of file af_amerge.c.

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_inputsnumber of inputs
ininputs; used only for the nb_ch field;
routerouting 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
inspointer to the samples of each inputs, in packed format; will be left at the end of the copied samples
outspointer 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
nsnumber of samples to copy
bpsbytes per sample

Definition at line 207 of file af_amerge.c.

Referenced by filter_frame().

static int filter_frame ( AVFilterLink inlink,
AVFrame insamples 
)
static

Definition at line 228 of file af_amerge.c.

Referenced by init().

static av_cold int init ( AVFilterContext ctx)
static

Definition at line 312 of file af_amerge.c.

Variable Documentation

const AVOption amerge_options[]
static
Initial value:
= {
{ "inputs", "specify the number of inputs", OFFSET(nb_inputs),
AV_OPT_TYPE_INT, { .i64 = 2 }, 2, SWR_CH_MAX, FLAGS },
{ NULL }
}
#define NULL
Definition: coverity.c:32
#define SWR_CH_MAX
Definition: af_amerge.c:35
#define FLAGS
Definition: af_amerge.c:51
#define OFFSET(x)
Definition: af_amerge.c:50

Definition at line 53 of file af_amerge.c.

const AVFilterPad amerge_outputs[]
static
Initial value:
= {
{
.name = "default",
.config_props = config_output,
.request_frame = request_frame,
},
{ NULL }
}
#define NULL
Definition: coverity.c:32
static int request_frame(AVFilterLink *outlink)
Definition: af_amerge.c:178
static int config_output(AVFilterLink *outlink)
Definition: af_amerge.c:146

Definition at line 334 of file af_amerge.c.

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,
.priv_class = &amerge_class,
}
#define NULL
Definition: coverity.c:32
#define AVFILTER_FLAG_DYNAMIC_INPUTS
The number of the filter inputs is not determined just by AVFilter.inputs.
Definition: avfilter.h:105
static av_cold int init(AVFilterContext *ctx)
Definition: af_amerge.c:312
static av_cold void uninit(AVFilterContext *ctx)
Definition: af_amerge.c:61
static const AVFilterPad amerge_outputs[]
Definition: af_amerge.c:334
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:176
static const AVFilterPad outputs[]
Definition: af_afftfilt.c:386
static int query_formats(AVFilterContext *ctx)
Definition: af_amerge.c:75
static const AVFilterPad inputs[]
Definition: af_afftfilt.c:376
static int flags
Definition: cpu.c:47

Definition at line 344 of file af_amerge.c.