FFmpeg
Data Structures | Macros | Functions | Variables
af_replaygain.c File Reference
#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 []
 
const AVFilter ff_af_replaygain
 

Detailed Description

ReplayGain scanner

Definition in file af_replaygain.c.

Macro Definition Documentation

◆ HISTOGRAM_SLOTS

#define HISTOGRAM_SLOTS   12000

Definition at line 32 of file af_replaygain.c.

◆ BUTTER_ORDER

#define BUTTER_ORDER   2

Definition at line 33 of file af_replaygain.c.

◆ YULE_ORDER

#define YULE_ORDER   10

Definition at line 34 of file af_replaygain.c.

Function Documentation

◆ query_formats()

static int query_formats ( AVFilterContext ctx)
static

Definition at line 322 of file af_replaygain.c.

◆ config_input()

static int config_input ( AVFilterLink inlink)
static

Definition at line 343 of file af_replaygain.c.

◆ calc_stereo_peak()

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

Definition at line 371 of file af_replaygain.c.

Referenced by filter_frame().

◆ calc_stereo_rms()

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

Definition at line 398 of file af_replaygain.c.

Referenced by filter_frame().

◆ butter_filter_stereo_samples()

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

Definition at line 414 of file af_replaygain.c.

Referenced by filter_frame().

◆ yule_filter_stereo_samples()

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

Definition at line 463 of file af_replaygain.c.

Referenced by filter_frame().

◆ calc_replaygain()

static float calc_replaygain ( uint32_t *  histogram)
static

Definition at line 530 of file af_replaygain.c.

Referenced by uninit().

◆ filter_frame()

static int filter_frame ( AVFilterLink inlink,
AVFrame in 
)
static

Definition at line 548 of file af_replaygain.c.

◆ uninit()

static av_cold void uninit ( AVFilterContext ctx)
static

Definition at line 579 of file af_replaygain.c.

Variable Documentation

◆ freqinfos

const ReplayGainFreqInfo freqinfos[]
static

Definition at line 44 of file af_replaygain.c.

Referenced by config_input(), and query_formats().

◆ replaygain_inputs

const AVFilterPad replaygain_inputs[]
static
Initial value:
= {
{
.name = "default",
.filter_frame = filter_frame,
.config_props = config_input,
},
}

Definition at line 588 of file af_replaygain.c.

◆ replaygain_outputs

const AVFilterPad replaygain_outputs[]
static
Initial value:
= {
{
.name = "default",
},
}

Definition at line 597 of file af_replaygain.c.

◆ ff_af_replaygain

const AVFilter ff_af_replaygain
Initial value:
= {
.name = "replaygain",
.description = NULL_IF_CONFIG_SMALL("ReplayGain scanner."),
.uninit = uninit,
.priv_size = sizeof(ReplayGainContext),
}

Definition at line 604 of file af_replaygain.c.

query_formats
static int query_formats(AVFilterContext *ctx)
Definition: af_replaygain.c:322
FILTER_QUERY_FUNC
#define FILTER_QUERY_FUNC(func)
Definition: internal.h:167
ReplayGainContext
Definition: af_replaygain.c:308
AVMEDIA_TYPE_AUDIO
@ AVMEDIA_TYPE_AUDIO
Definition: avutil.h:202
FILTER_INPUTS
#define FILTER_INPUTS(array)
Definition: internal.h:190
filter_frame
static int filter_frame(AVFilterLink *inlink, AVFrame *in)
Definition: af_replaygain.c:548
replaygain_inputs
static const AVFilterPad replaygain_inputs[]
Definition: af_replaygain.c:588
config_input
static int config_input(AVFilterLink *inlink)
Definition: af_replaygain.c:343
uninit
static av_cold void uninit(AVFilterContext *ctx)
Definition: af_replaygain.c:579
NULL_IF_CONFIG_SMALL
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification.
Definition: internal.h:115
replaygain_outputs
static const AVFilterPad replaygain_outputs[]
Definition: af_replaygain.c:597
AVFILTER_FLAG_METADATA_ONLY
#define AVFILTER_FLAG_METADATA_ONLY
The filter is a "metadata" filter - it does not modify the frame data in any way.
Definition: avfilter.h:143
FILTER_OUTPUTS
#define FILTER_OUTPUTS(array)
Definition: internal.h:191
flags
#define flags(name, subs,...)
Definition: cbs_av1.c:561