#include <float.h>
#include <math.h>
#include "libavutil/opt.h"
#include "libavutil/tx.h"
#include "audio.h"
#include "avfilter.h"
#include "filters.h"
#include "internal.h"
#include "window_func.h"

Data Structures
struct	ChannelSpectralStats

struct	AudioSpectralStatsContext

Macros
#define	OFFSET(x) offsetof(AudioSpectralStatsContext, x)

#define	A AV_OPT_FLAG_AUDIO_PARAM\|AV_OPT_FLAG_FILTERING_PARAM

Functions
	AVFILTER_DEFINE_CLASS (aspectralstats)

static int	config_output (AVFilterLink *outlink)

static void	set_meta (AVDictionary *metadata, int chan, const char key, const char *fmt, float val)

static void	set_metadata (AudioSpectralStatsContext s, AVDictionary *metadata)

static float	spectral_mean (const float *const spectral, int size, int max_freq)

static float	sqrf (float a)

static float	spectral_variance (const float *const spectral, int size, int max_freq, float mean)

static float	spectral_centroid (const float *const spectral, int size, int max_freq)

static float	spectral_spread (const float *const spectral, int size, int max_freq, float centroid)

static float	cbrf (float a)

static float	spectral_skewness (const float *const spectral, int size, int max_freq, float centroid, float spread)

static float	spectral_kurtosis (const float *const spectral, int size, int max_freq, float centroid, float spread)

static float	spectral_entropy (const float *const spectral, int size, int max_freq)

static float	spectral_flatness (const float *const spectral, int size, int max_freq)

static float	spectral_crest (const float *const spectral, int size, int max_freq)

static float	spectral_flux (const float const spectral, const float const prev_spectral, int size, int max_freq)

static float	spectral_slope (const float *const spectral, int size, int max_freq)

static float	spectral_decrease (const float *const spectral, int size, int max_freq)

static float	spectral_rolloff (const float *const spectral, int size, int max_freq)

static int	filter_channel (AVFilterContext ctx, void arg, int jobnr, int nb_jobs)

static int	filter_frame (AVFilterLink inlink, AVFrame in)

static int	activate (AVFilterContext *ctx)

static av_cold void	uninit (AVFilterContext *ctx)

Variables
static const AVOption	aspectralstats_options []

static const AVFilterPad	aspectralstats_inputs []

static const AVFilterPad	aspectralstats_outputs []

const AVFilter	ff_af_aspectralstats

Macro Definition Documentation

◆ OFFSET

#define OFFSET ( x ) offsetof(AudioSpectralStatsContext, x)

Definition at line 66 of file af_aspectralstats.c.

◆ A

#define A AV_OPT_FLAG_AUDIO_PARAM|AV_OPT_FLAG_FILTERING_PARAM

Definition at line 67 of file af_aspectralstats.c.

Function Documentation

◆ AVFILTER_DEFINE_CLASS()

AVFILTER_DEFINE_CLASS ( aspectralstats )

◆ config_output()

static int config_output ( AVFilterLink * outlink )

static

Definition at line 78 of file af_aspectralstats.c.

◆ set_meta()

static void set_meta	(	AVDictionary **	metadata,
		int	chan,
		const char *	key,
		const char *	fmt,
		float	val
	)

static

Definition at line 150 of file af_aspectralstats.c.

Referenced by do_vif(), and set_metadata().

◆ set_metadata()

static void set_metadata	(	AudioSpectralStatsContext *	s,
		AVDictionary **	metadata
	)

static

Definition at line 164 of file af_aspectralstats.c.

Referenced by filter_frame().

◆ spectral_mean()

static float spectral_mean	(	const float *const	spectral,
		int	size,
		int	max_freq
	)

static

Definition at line 185 of file af_aspectralstats.c.

Referenced by filter_channel().

◆ sqrf()

static float sqrf ( float a )

static

Definition at line 195 of file af_aspectralstats.c.

Referenced by spectral_flux(), spectral_kurtosis(), spectral_slope(), spectral_spread(), and spectral_variance().

◆ spectral_variance()

static float spectral_variance	(	const float *const	spectral,
		int	size,
		int	max_freq,
		float	mean
	)

static

Definition at line 200 of file af_aspectralstats.c.

Referenced by filter_channel().

◆ spectral_centroid()

static float spectral_centroid	(	const float *const	spectral,
		int	size,
		int	max_freq
	)

static

Definition at line 210 of file af_aspectralstats.c.

Referenced by filter_channel().

◆ spectral_spread()

static float spectral_spread	(	const float *const	spectral,
		int	size,
		int	max_freq,
		float	centroid
	)

static

Definition at line 225 of file af_aspectralstats.c.

Referenced by filter_channel().

◆ cbrf()

static float cbrf ( float a )

static

Definition at line 240 of file af_aspectralstats.c.

Referenced by spectral_skewness().

◆ spectral_skewness()

static float spectral_skewness	(	const float *const	spectral,
		int	size,
		int	max_freq,
		float	centroid,
		float	spread
	)

static

Definition at line 245 of file af_aspectralstats.c.

Referenced by filter_channel().

◆ spectral_kurtosis()

static float spectral_kurtosis	(	const float *const	spectral,
		int	size,
		int	max_freq,
		float	centroid,
		float	spread
	)

static

Definition at line 261 of file af_aspectralstats.c.

Referenced by filter_channel().

◆ spectral_entropy()

static float spectral_entropy	(	const float *const	spectral,
		int	size,
		int	max_freq
	)

static

Definition at line 277 of file af_aspectralstats.c.

Referenced by filter_channel().

◆ spectral_flatness()

static float spectral_flatness	(	const float *const	spectral,
		int	size,
		int	max_freq
	)

static

Definition at line 291 of file af_aspectralstats.c.

Referenced by filter_channel().

◆ spectral_crest()

static float spectral_crest	(	const float *const	spectral,
		int	size,
		int	max_freq
	)

static

Definition at line 309 of file af_aspectralstats.c.

Referenced by filter_channel().

◆ spectral_flux()

static float spectral_flux	(	const float *const	spectral,
		const float *const	prev_spectral,
		int	size,
		int	max_freq
	)

static

Definition at line 324 of file af_aspectralstats.c.

Referenced by filter_channel().

◆ spectral_slope()

static float spectral_slope	(	const float *const	spectral,
		int	size,
		int	max_freq
	)

static

Definition at line 335 of file af_aspectralstats.c.

Referenced by filter_channel().

◆ spectral_decrease()

static float spectral_decrease	(	const float *const	spectral,
		int	size,
		int	max_freq
	)

static

Definition at line 354 of file af_aspectralstats.c.

Referenced by filter_channel().

◆ spectral_rolloff()

static float spectral_rolloff	(	const float *const	spectral,
		int	size,
		int	max_freq
	)

static

Definition at line 368 of file af_aspectralstats.c.

Referenced by filter_channel().

◆ filter_channel()

static int filter_channel	(	AVFilterContext *	ctx,
		void *	arg,
		int	jobnr,
		int	nb_jobs
	)

static

Definition at line 389 of file af_aspectralstats.c.

Referenced by filter_frame().

◆ filter_frame()

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

static

Definition at line 447 of file af_aspectralstats.c.

Referenced by activate().

◆ activate()

static int activate ( AVFilterContext * ctx )

static

Definition at line 487 of file af_aspectralstats.c.

◆ uninit()

static av_cold void uninit ( AVFilterContext * ctx )

static

Definition at line 516 of file af_aspectralstats.c.

Variable Documentation

◆ aspectralstats_options

const AVOption aspectralstats_options[]

static

Initial value:

= {
    { "win_size", "set the window size", OFFSET(win_size), AV_OPT_TYPE_INT, {.i64=2048}, 32, 65536, A },
    WIN_FUNC_OPTION("win_func", OFFSET(win_func), A, WFUNC_HANNING),
    { "overlap", "set window overlap", OFFSET(overlap), AV_OPT_TYPE_FLOAT, {.dbl=0.5}, 0,  1, A },
    { NULL }
}

Definition at line 69 of file af_aspectralstats.c.

◆ aspectralstats_inputs

const AVFilterPad aspectralstats_inputs[]

static

Initial value:

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

Definition at line 544 of file af_aspectralstats.c.

◆ aspectralstats_outputs

const AVFilterPad aspectralstats_outputs[]

static

Initial value:

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

Definition at line 551 of file af_aspectralstats.c.

◆ ff_af_aspectralstats

const AVFilter ff_af_aspectralstats

Initial value:

= {
    .name          = "aspectralstats",
    .description   = NULL_IF_CONFIG_SMALL("Show frequency domain statistics about audio frames."),
    .priv_size     = sizeof(AudioSpectralStatsContext),
    .priv_class    = &aspectralstats_class,
    .uninit        = uninit,
    .activate      = activate,
    FILTER_INPUTS(aspectralstats_inputs),
    FILTER_OUTPUTS(aspectralstats_outputs),
    FILTER_SINGLE_SAMPLEFMT(AV_SAMPLE_FMT_FLTP),
    .flags         = AVFILTER_FLAG_SLICE_THREADS,
}

Definition at line 559 of file af_aspectralstats.c.

Data Structures

Macros

Functions

Variables

Macro Definition Documentation

◆ OFFSET

◆ A

Function Documentation

◆ AVFILTER_DEFINE_CLASS()

◆ config_output()

◆ set_meta()

◆ set_metadata()

◆ spectral_mean()

◆ sqrf()

◆ spectral_variance()

◆ spectral_centroid()

◆ spectral_spread()

◆ cbrf()

◆ spectral_skewness()

◆ spectral_kurtosis()

◆ spectral_entropy()

◆ spectral_flatness()

◆ spectral_crest()

◆ spectral_flux()

◆ spectral_slope()

◆ spectral_decrease()

◆ spectral_rolloff()

◆ filter_channel()

◆ filter_frame()

◆ activate()

◆ uninit()

Variable Documentation

◆ aspectralstats_options

◆ aspectralstats_inputs

◆ aspectralstats_outputs

◆ ff_af_aspectralstats