af_aresample.c File Reference

resampling audio filter More...

#include "libavutil/avstring.h"
#include "libavutil/channel_layout.h"
#include "libavutil/downmix_info.h"
#include "libavutil/opt.h"
#include "libavutil/samplefmt.h"
#include "libavutil/avassert.h"
#include "libswresample/swresample.h"
#include "avfilter.h"
#include "audio.h"
#include "filters.h"
#include "formats.h"

Go to the source code of this file.

Data Structures
struct	AResampleContext

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

Functions
static av_cold int	preinit (AVFilterContext *ctx)
static av_cold void	uninit (AVFilterContext *ctx)
static int	query_formats (const AVFilterContext *ctx, AVFilterFormatsConfig **cfg_in, AVFilterFormatsConfig **cfg_out)
static int	config_output (AVFilterLink *outlink)
static int	filter_frame (AVFilterLink *inlink, AVFrame *insamplesref, AVFrame **outsamplesref_ret)
static int	flush_frame (AVFilterLink *outlink, int final, AVFrame **outsamplesref_ret)
static int	activate (AVFilterContext *ctx)
static const AVClass *	resample_child_class_iterate (void **iter)
static void *	resample_child_next (void *obj, void *prev)

Variables
static const AVOption	options []
static const AVClass	aresample_class
static const AVFilterPad	aresample_outputs []
const FFFilter	ff_af_aresample

Detailed Description

resampling audio filter

Definition in file af_aresample.c.

Macro Definition Documentation

SWR_CH_MAX

#define SWR_CH_MAX   64

Definition at line 126 of file af_aresample.c.

OFFSET

#define OFFSET

(

x

)

Value:

offsetof(AResampleContext, x)

Definition at line 411 of file af_aresample.c.

FLAGS

#define FLAGS   AV_OPT_FLAG_AUDIO_PARAM|AV_OPT_FLAG_FILTERING_PARAM

Definition at line 412 of file af_aresample.c.

Function Documentation

preinit()

static av_cold int preinit ( AVFilterContext * ctx )

static

Definition at line 48 of file af_aresample.c.

uninit()

static av_cold void uninit ( AVFilterContext * ctx )

static

Definition at line 60 of file af_aresample.c.

query_formats()

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

static

Definition at line 66 of file af_aresample.c.

config_output()

static int config_output ( AVFilterLink * outlink )

static

Definition at line 128 of file af_aresample.c.

filter_frame()

static int filter_frame ( AVFilterLink * inlink, AVFrame * insamplesref, AVFrame ** outsamplesref_ret )

static

Definition at line 255 of file af_aresample.c.

Referenced by activate().

flush_frame()

static int flush_frame ( AVFilterLink * outlink, int final, AVFrame ** outsamplesref_ret )

static

Definition at line 311 of file af_aresample.c.

Referenced by activate().

activate()

static int activate ( AVFilterContext * ctx )

static

Definition at line 342 of file af_aresample.c.

resample_child_class_iterate()

static const AVClass * resample_child_class_iterate ( void ** iter )

static

Definition at line 398 of file af_aresample.c.

resample_child_next()

static void * resample_child_next ( void * obj, void * prev )

static

Definition at line 405 of file af_aresample.c.

Variable Documentation

options

const AVOption options[]

static

Initial value:

= {
    {"sample_rate", NULL, OFFSET(sample_rate_arg), AV_OPT_TYPE_INT, {.i64=0},  0,        INT_MAX, FLAGS },
    {NULL}
}

Definition at line 414 of file af_aresample.c.

aresample_class

const AVClass aresample_class

static

Initial value:

= {
    .class_name       = "aresample",
    .item_name        = av_default_item_name,
    .option           = options,
    .version          = LIBAVUTIL_VERSION_INT,
    .child_class_iterate = resample_child_class_iterate,
    .child_next       = resample_child_next,
}

Definition at line 419 of file af_aresample.c.

aresample_outputs

const AVFilterPad aresample_outputs[]

static

Initial value:

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

Definition at line 428 of file af_aresample.c.

ff_af_aresample

const FFFilter ff_af_aresample

Initial value:

= {
    .p.name        = "aresample",
    .p.description = NULL_IF_CONFIG_SMALL("Resample audio data."),
    .p.priv_class  = &aresample_class,
    .preinit       = preinit,
    .activate      = activate,
    .uninit        = uninit,
    .priv_size     = sizeof(AResampleContext),
    FILTER_INPUTS(ff_audio_default_filterpad),
    FILTER_OUTPUTS(aresample_outputs),
    FILTER_QUERY_FUNC2(query_formats),
}

Definition at line 436 of file af_aresample.c.