af_axcorrelate.c File Reference

#include "libavutil/avassert.h"
#include "libavutil/audio_fifo.h"
#include "libavutil/channel_layout.h"
#include "libavutil/common.h"
#include "libavutil/opt.h"
#include "audio.h"
#include "avfilter.h"
#include "formats.h"
#include "filters.h"
#include "internal.h"

Go to the source code of this file.

Data Structures
struct	AudioXCorrelateContext

Macros
#define	AF   AV_OPT_FLAG_AUDIO_PARAM|AV_OPT_FLAG_FILTERING_PARAM
#define	OFFSET(x)   offsetof(AudioXCorrelateContext, x)

Functions
static int	query_formats (AVFilterContext *ctx)
static float	mean_sum (const float *in, int size)
static float	square_sum (const float *x, const float *y, int size)
static float	xcorrelate (const float *x, const float *y, float sumx, float sumy, int size)
static int	xcorrelate_slow (AVFilterContext *ctx, AVFrame *out)
static int	xcorrelate_fast (AVFilterContext *ctx, AVFrame *out)
static int	activate (AVFilterContext *ctx)
static int	config_output (AVFilterLink *outlink)
static av_cold void	uninit (AVFilterContext *ctx)
	AVFILTER_DEFINE_CLASS (axcorrelate)

Variables
static const AVFilterPad	inputs []
static const AVFilterPad	outputs []
static const AVOption	axcorrelate_options []
AVFilter	ff_af_axcorrelate

Macro Definition Documentation

AF

#define AF   AV_OPT_FLAG_AUDIO_PARAM|AV_OPT_FLAG_FILTERING_PARAM

Definition at line 355 of file af_axcorrelate.c.

OFFSET

#define OFFSET

(

x

)

offsetof(AudioXCorrelateContext, x)

Definition at line 356 of file af_axcorrelate.c.

Function Documentation

query_formats()

static int query_formats ( AVFilterContext *  ctx )

static

Definition at line 50 of file af_axcorrelate.c.

mean_sum()

static float mean_sum ( const float *  in, int  size  )

static

Definition at line 80 of file af_axcorrelate.c.

Referenced by xcorrelate_slow().

square_sum()

static float square_sum ( const float *  x, const float *  y, int  size  )

static

Definition at line 90 of file af_axcorrelate.c.

Referenced by vp6_block_variance(), and xcorrelate_fast().

xcorrelate()

static float xcorrelate ( const float *  x, const float *  y, float  sumx, float  sumy, int  size  )

static

Definition at line 100 of file af_axcorrelate.c.

Referenced by xcorrelate_slow().

xcorrelate_slow()

static int xcorrelate_slow ( AVFilterContext *  ctx, AVFrame *  out  )

static

Definition at line 120 of file af_axcorrelate.c.

Referenced by config_output().

xcorrelate_fast()

static int xcorrelate_fast ( AVFilterContext *  ctx, AVFrame *  out  )

static

Definition at line 153 of file af_axcorrelate.c.

Referenced by config_output().

activate()

static int activate ( AVFilterContext *  ctx )

static

Definition at line 197 of file af_axcorrelate.c.

config_output()

static int config_output ( AVFilterLink *  outlink )

static

Definition at line 287 of file af_axcorrelate.c.

uninit()

static av_cold void uninit ( AVFilterContext *  ctx )

static

Definition at line 319 of file af_axcorrelate.c.

AVFILTER_DEFINE_CLASS()

AVFILTER_DEFINE_CLASS

(

axcorrelate

)

Variable Documentation

inputs

const AVFilterPad inputs[]

static

Initial value:

= {
    {
        .name = "axcorrelate0",
        .type = AVMEDIA_TYPE_AUDIO,
    },
    {
        .name = "axcorrelate1",
        .type = AVMEDIA_TYPE_AUDIO,
    },
    { NULL }
}

Definition at line 334 of file af_axcorrelate.c.

outputs

const AVFilterPad outputs[]

static

Initial value:

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

Definition at line 346 of file af_axcorrelate.c.

axcorrelate_options

const AVOption axcorrelate_options[]

static

Initial value:

= {
    { "size", "set segment size", OFFSET(size), AV_OPT_TYPE_INT,   {.i64=256}, 2, 131072, AF },
    { "algo", "set alghorithm",   OFFSET(algo), AV_OPT_TYPE_INT,   {.i64=0},   0,      1, AF, "algo" },
    { "slow", "slow algorithm",   0,            AV_OPT_TYPE_CONST, {.i64=0},   0,      0, AF, "algo" },
    { "fast", "fast algorithm",   0,            AV_OPT_TYPE_CONST, {.i64=1},   0,      0, AF, "algo" },
    { NULL }
}

Definition at line 358 of file af_axcorrelate.c.

ff_af_axcorrelate

AVFilter ff_af_axcorrelate

Initial value:

= {
    .name           = "axcorrelate",
    .description    = NULL_IF_CONFIG_SMALL("Cross-correlate two audio streams."),
    .priv_size      = sizeof(AudioXCorrelateContext),
    .priv_class     = &axcorrelate_class,
    .query_formats  = query_formats,
    .activate       = activate,
    .uninit         = uninit,
    .inputs         = inputs,
    .outputs        = outputs,
}

Definition at line 368 of file af_axcorrelate.c.