af_replaygain.c File Reference

ReplayGain scanner. More...

#include "libavutil/avassert.h"
#include "libavutil/channel_layout.h"
#include "audio.h"
#include "avfilter.h"
#include "internal.h"

Go to the source code of this file.

Data Structures
struct	ReplayGainFreqInfo
struct	ReplayGainContext

Macros
#define	HISTOGRAM_SLOTS   12000
#define	BUTTER_ORDER   2
#define	YULE_ORDER   10

Functions
static int	query_formats (AVFilterContext *ctx)
static int	config_input (AVFilterLink *inlink)
static void	calc_stereo_peak (const float *samples, int nb_samples, float *peak_p)
static double	calc_stereo_rms (const float *samples, int nb_samples)
static void	butter_filter_stereo_samples (ReplayGainContext *s, float *samples, int nb_samples)
static void	yule_filter_stereo_samples (ReplayGainContext *s, const float *src, float *dst, int nb_samples)
static float	calc_replaygain (uint32_t *histogram)
static int	filter_frame (AVFilterLink *inlink, AVFrame *in)
static av_cold void	uninit (AVFilterContext *ctx)

Variables
static const ReplayGainFreqInfo	freqinfos []
static const AVFilterPad	replaygain_inputs []
static const AVFilterPad	replaygain_outputs []
AVFilter	ff_af_replaygain

Detailed Description

ReplayGain scanner.

Definition in file af_replaygain.c.

Macro Definition Documentation

#define HISTOGRAM_SLOTS   12000

Definition at line 32 of file af_replaygain.c.

Referenced by calc_replaygain(), and filter_frame().

#define BUTTER_ORDER   2

Definition at line 33 of file af_replaygain.c.

#define YULE_ORDER   10

Definition at line 34 of file af_replaygain.c.

Function Documentation

static int query_formats ( AVFilterContext *  ctx )

static

Definition at line 322 of file af_replaygain.c.

static int config_input ( AVFilterLink *  inlink )

static

Definition at line 343 of file af_replaygain.c.

static void calc_stereo_peak ( const float *  samples, int  nb_samples, float *  peak_p  )

static

Definition at line 372 of file af_replaygain.c.

Referenced by filter_frame().

static double calc_stereo_rms ( const float *  samples, int  nb_samples  )

static

Definition at line 399 of file af_replaygain.c.

Referenced by filter_frame().

static void butter_filter_stereo_samples ( ReplayGainContext *  s, float *  samples, int  nb_samples  )

static

Definition at line 415 of file af_replaygain.c.

Referenced by filter_frame().

static void yule_filter_stereo_samples ( ReplayGainContext *  s, const float *  src, float *  dst, int  nb_samples  )

static

Definition at line 464 of file af_replaygain.c.

Referenced by filter_frame().

static float calc_replaygain ( uint32_t *  histogram )

static

Definition at line 531 of file af_replaygain.c.

Referenced by uninit().

static int filter_frame ( AVFilterLink *  inlink, AVFrame *  in  )

static

Definition at line 549 of file af_replaygain.c.

static av_cold void uninit ( AVFilterContext *  ctx )

static

Definition at line 580 of file af_replaygain.c.

Variable Documentation

const ReplayGainFreqInfo freqinfos[]

static

Definition at line 44 of file af_replaygain.c.

const AVFilterPad replaygain_inputs[]

static

Initial value:

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

Definition at line 589 of file af_replaygain.c.

const AVFilterPad replaygain_outputs[]

static

Initial value:

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

Definition at line 599 of file af_replaygain.c.

AVFilter ff_af_replaygain

Initial value:

= {
    .name          = "replaygain",
    .description   = NULL_IF_CONFIG_SMALL("ReplayGain scanner."),
    .query_formats = query_formats,
    .uninit        = uninit,
    .priv_size     = sizeof(ReplayGainContext),
    .inputs        = replaygain_inputs,
    .outputs       = replaygain_outputs,
}

Definition at line 607 of file af_replaygain.c.