libavfilter/af_amerge.c File Reference

Audio merging filter. More...

#include "libswresample/swresample.h"
#include "avfilter.h"
#include "audio.h"
#include "internal.h"

Go to the source code of this file.

Data Structures
struct	AMergeContext
struct	AMergeContext::AMergeContext::amerge_queue
Defines
#define	QUEUE_SIZE   16
Functions
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_in_ch[2], int *route, uint8_t *ins[2], uint8_t **outs, int ns, int bps)
	Copy samples from two input streams to one output stream.
static void	filter_samples (AVFilterLink *inlink, AVFilterBufferRef *insamples)
Variables
AVFilter	avfilter_af_amerge

---

Detailed Description

Audio merging filter.

Definition in file af_amerge.c.

---

Define Documentation

#define QUEUE_SIZE   16

Definition at line 31 of file af_amerge.c.

---

Function Documentation

static int config_output

(

AVFilterLink *

outlink

)

[static]

Definition at line 113 of file af_amerge.c.

static void copy_samples	(	int	nb_in_ch[2],
		int *	route,
		uint8_t *	ins[2],
		uint8_t **	outs,
		int	ns,
		int	bps
	)			[inline, static]

Copy samples from two input streams to one output stream.

Parameters:

	nb_in_ch	number of channels in each input stream
	route	routing values; input channel i goes to output channel route[i]; i < nb_in_ch[0] are the channels from the first output; i >= nb_in_ch[0] 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 168 of file af_amerge.c.

static void filter_samples	(	AVFilterLink *	inlink,
		AVFilterBufferRef *	insamples
	)			[static]

Definition at line 186 of file af_amerge.c.

static int query_formats

(

AVFilterContext *

ctx

)

[static]

Definition at line 53 of file af_amerge.c.

static int request_frame

(

AVFilterLink *

outlink

)

[static]

Definition at line 140 of file af_amerge.c.

Referenced by avfilter_request_frame().

static av_cold void uninit

(

AVFilterContext *

ctx

)

[static]

Definition at line 43 of file af_amerge.c.

---

Variable Documentation

AVFilter avfilter_af_amerge

Initial value:

 {
    .name          = "amerge",
    .description   = NULL_IF_CONFIG_SMALL("Merge two audio streams into "
                                          "a single multi-channel stream."),
    .priv_size     = sizeof(AMergeContext),
    .uninit        = uninit,
    .query_formats = query_formats,

    .inputs    = (const AVFilterPad[]) {
        { .name             = "in1",
          .type             = AVMEDIA_TYPE_AUDIO,
          .filter_samples   = filter_samples,
          .min_perms        = AV_PERM_READ, },
        { .name             = "in2",
          .type             = AVMEDIA_TYPE_AUDIO,
          .filter_samples   = filter_samples,
          .min_perms        = AV_PERM_READ, },
        { .name = NULL }
    },
    .outputs   = (const AVFilterPad[]) {
        { .name             = "default",
          .type             = AVMEDIA_TYPE_AUDIO,
          .config_props     = config_output,
          .request_frame    = request_frame, },
        { .name = NULL }
    },
}

Definition at line 274 of file af_amerge.c.