#include <float.h>
#include "libavutil/avstring.h"
#include "libavutil/intreadwrite.h"
#include "libavutil/opt.h"
#include "libavutil/xga_font_data.h"
#include "audio.h"
#include "avfilter.h"
#include "internal.h"

Data Structures
struct	ThreadData
	Used for passing data between threads. More...

struct	Pair

struct	BiquadContext

struct	IIRChannel

struct	AudioIIRContext

Macros
#define	IIR_CH(name, type, min, max, need_clipping)

#define	SERIAL_IIR_CH(name, type, min, max, need_clipping)

#define	PARALLEL_IIR_CH(name, type, min, max, need_clipping)

#define	LATTICE_IIR_CH(name, type, min, max, need_clipping)

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

#define	AF AV_OPT_FLAG_AUDIO_PARAM\|AV_OPT_FLAG_FILTERING_PARAM

#define	VF AV_OPT_FLAG_VIDEO_PARAM\|AV_OPT_FLAG_FILTERING_PARAM

Functions
static int	query_formats (AVFilterContext *ctx)

static void	count_coefficients (char item_str, int nb_items)

static int	read_gains (AVFilterContext ctx, char item_str, int nb_items)

static int	read_tf_coefficients (AVFilterContext ctx, char item_str, int nb_items, double *dst)

static int	read_zp_coefficients (AVFilterContext ctx, char item_str, int nb_items, double dst, const char format)

static int	read_channels (AVFilterContext ctx, int channels, uint8_t item_str, int ab)

static void	cmul (double re, double im, double re2, double im2, double RE, double IM)

static int	expand (AVFilterContext ctx, double pz, int n, double *coefs)

static void	normalize_coeffs (AVFilterContext *ctx, int ch)

static int	convert_zp2tf (AVFilterContext *ctx, int channels)

static int	decompose_zp2biquads (AVFilterContext *ctx, int channels)

static void	biquad_process (double x, double y, int length, double b0, double b1, double b2, double a1, double a2)

static void	solve (double matrix, double vector, int n, double y, double x, double *lu)

static int	convert_serial2parallel (AVFilterContext *ctx, int channels)

static void	convert_pr2zp (AVFilterContext *ctx, int channels)

static void	convert_sp2zp (AVFilterContext *ctx, int channels)

static double	fact (double i)

static double	coef_sf2zf (double *a, int N, int n)

static void	convert_sf2tf (AVFilterContext *ctx, int channels)

static void	convert_pd2zp (AVFilterContext *ctx, int channels)

static void	check_stability (AVFilterContext *ctx, int channels)

static void	drawtext (AVFrame pic, int x, int y, const char txt, uint32_t color)

static void	draw_line (AVFrame *out, int x0, int y0, int x1, int y1, uint32_t color)

static double	distance (double x0, double x1, double y0, double y1)

static void	get_response (int channel, int format, double w, const double b, const double a, int nb_b, int nb_a, double magnitude, double phase)

static void	draw_response (AVFilterContext ctx, AVFrame out, int sample_rate)

static int	config_output (AVFilterLink *outlink)

static int	filter_frame (AVFilterLink inlink, AVFrame in)

static int	config_video (AVFilterLink *outlink)

static av_cold int	init (AVFilterContext *ctx)

static av_cold void	uninit (AVFilterContext *ctx)

	AVFILTER_DEFINE_CLASS (aiir)

Variables
static const char *const	format [] = { "%lf", "%lf %lfi", "%lf %lfr", "%lf %lfd", "%lf %lfi" }

static const AVFilterPad	inputs []

static const AVOption	aiir_options []

const AVFilter	ff_af_aiir

Macro Definition Documentation

◆ IIR_CH

#define IIR_CH	(	name,
		type,
		min,
		max,
		need_clipping
	)

Definition at line 112 of file af_aiir.c.

◆ SERIAL_IIR_CH

#define SERIAL_IIR_CH	(	name,
		type,
		min,
		max,
		need_clipping
	)

Definition at line 168 of file af_aiir.c.

◆ PARALLEL_IIR_CH

#define PARALLEL_IIR_CH	(	name,
		type,
		min,
		max,
		need_clipping
	)

Definition at line 227 of file af_aiir.c.

◆ LATTICE_IIR_CH

#define LATTICE_IIR_CH	(	name,
		type,
		min,
		max,
		need_clipping
	)

Definition at line 291 of file af_aiir.c.

◆ OFFSET

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

Definition at line 1523 of file af_aiir.c.

◆ AF

#define AF AV_OPT_FLAG_AUDIO_PARAM|AV_OPT_FLAG_FILTERING_PARAM

Definition at line 1524 of file af_aiir.c.

◆ VF

#define VF AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM

Definition at line 1525 of file af_aiir.c.

Function Documentation

◆ query_formats()

static int query_formats ( AVFilterContext * ctx )

static

Definition at line 78 of file af_aiir.c.

◆ count_coefficients()

static void count_coefficients	(	char *	item_str,
		int *	nb_items
	)

static

Definition at line 348 of file af_aiir.c.

Referenced by read_channels().

◆ read_gains()

static int read_gains	(	AVFilterContext *	ctx,
		char *	item_str,
		int	nb_items
	)

static

Definition at line 362 of file af_aiir.c.

Referenced by config_output().

◆ read_tf_coefficients()

static int read_tf_coefficients	(	AVFilterContext *	ctx,
		char *	item_str,
		int	nb_items,
		double *	dst
	)

static

Definition at line 395 of file af_aiir.c.

Referenced by read_channels().

◆ read_zp_coefficients()

static int read_zp_coefficients	(	AVFilterContext *	ctx,
		char *	item_str,
		int	nb_items,
		double *	dst,
		const char *	format
	)

static

Definition at line 420 of file af_aiir.c.

Referenced by read_channels().

◆ read_channels()

static int read_channels	(	AVFilterContext *	ctx,
		int	channels,
		uint8_t *	item_str,
		int	ab
	)

static

Definition at line 447 of file af_aiir.c.

Referenced by config_output().

◆ cmul()

static void cmul	(	double	re,
		double	im,
		double	re2,
		double	im2,
		double *	RE,
		double *	IM
	)

static

Definition at line 494 of file af_aiir.c.

Referenced by expand().

◆ expand()

static int expand	(	AVFilterContext *	ctx,
		double *	pz,
		int	n,
		double *	coefs
	)

static

Definition at line 500 of file af_aiir.c.

Referenced by convert_zp2tf(), and decompose_zp2biquads().

◆ normalize_coeffs()

static void normalize_coeffs	(	AVFilterContext *	ctx,
		int	ch
	)

static

Definition at line 527 of file af_aiir.c.

Referenced by config_output(), and convert_zp2tf().

◆ convert_zp2tf()

static int convert_zp2tf	(	AVFilterContext *	ctx,
		int	channels
	)

static

Definition at line 555 of file af_aiir.c.

Referenced by config_output().

◆ decompose_zp2biquads()

static int decompose_zp2biquads	(	AVFilterContext *	ctx,
		int	channels
	)

static

Definition at line 603 of file af_aiir.c.

Referenced by config_output().

◆ biquad_process()

static void biquad_process	(	double *	x,
		double *	y,
		int	length,
		double	b0,
		double	b1,
		double	b2,
		double	a1,
		double	a2
	)

static

Definition at line 765 of file af_aiir.c.

Referenced by convert_serial2parallel().

◆ solve()

static void solve	(	double *	matrix,
		double *	vector,
		int	n,
		double *	y,
		double *	x,
		double *	lu
	)

static

Definition at line 783 of file af_aiir.c.

Referenced by convert_serial2parallel().

◆ convert_serial2parallel()

static int convert_serial2parallel	(	AVFilterContext *	ctx,
		int	channels
	)

static

Definition at line 817 of file af_aiir.c.

Referenced by config_output().

◆ convert_pr2zp()

static void convert_pr2zp	(	AVFilterContext *	ctx,
		int	channels
	)

static

Definition at line 887 of file af_aiir.c.

Referenced by config_output().

◆ convert_sp2zp()

static void convert_sp2zp	(	AVFilterContext *	ctx,
		int	channels
	)

static

Definition at line 914 of file af_aiir.c.

Referenced by config_output().

◆ fact()

static double fact ( double i )

static

Definition at line 941 of file af_aiir.c.

Referenced by apply_tilt_comp(), coef_sf2zf(), ftp_parse_entry_mlsd(), nb_decode(), pitch_unquant_3tap(), and pred_angular().

◆ coef_sf2zf()

static double coef_sf2zf	(	double *	a,
		int	N,
		int	n
	)

static

Definition at line 948 of file af_aiir.c.

Referenced by convert_sf2tf().

◆ convert_sf2tf()

static void convert_sf2tf	(	AVFilterContext *	ctx,
		int	channels
	)

static

Definition at line 967 of file af_aiir.c.

Referenced by config_output().

◆ convert_pd2zp()

static void convert_pd2zp	(	AVFilterContext *	ctx,
		int	channels
	)

static

Definition at line 995 of file af_aiir.c.

Referenced by config_output().

◆ check_stability()

static void check_stability	(	AVFilterContext *	ctx,
		int	channels
	)

static

Definition at line 1022 of file af_aiir.c.

Referenced by config_output().

◆ drawtext()

static void drawtext	(	AVFrame *	pic,
		int	x,
		int	y,
		const char *	txt,
		uint32_t	color
	)

static

Definition at line 1041 of file af_aiir.c.

Referenced by draw_response().

◆ draw_line()

static void draw_line	(	AVFrame *	out,
		int	x0,
		int	y0,
		int	x1,
		int	y1,
		uint32_t	color
	)

static

Definition at line 1064 of file af_aiir.c.

Referenced by draw_response().

◆ distance()

static double distance	(	double	x0,
		double	x1,
		double	y0,
		double	y1
	)

static

Definition at line 1090 of file af_aiir.c.

Referenced by decompose_zp2biquads(), and get_response().

◆ get_response()

static void get_response	(	int	channel,
		int	format,
		double	w,
		const double *	b,
		const double *	a,
		int	nb_b,
		int	nb_a,
		double *	magnitude,
		double *	phase
	)

static

Definition at line 1095 of file af_aiir.c.

Referenced by draw_response().

◆ draw_response()

static void draw_response	(	AVFilterContext *	ctx,
		AVFrame *	out,
		int	sample_rate
	)

static

Definition at line 1142 of file af_aiir.c.

Referenced by config_output().

◆ config_output()

static int config_output ( AVFilterLink * outlink )

static

Definition at line 1259 of file af_aiir.c.

Referenced by init().

◆ filter_frame()

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

static

Definition at line 1382 of file af_aiir.c.

◆ config_video()

static int config_video ( AVFilterLink * outlink )

static

Definition at line 1437 of file af_aiir.c.

Referenced by init().

◆ init()

static av_cold int init ( AVFilterContext * ctx )

static

Definition at line 1451 of file af_aiir.c.

◆ uninit()

static av_cold void uninit ( AVFilterContext * ctx )

static

Definition at line 1495 of file af_aiir.c.

◆ AVFILTER_DEFINE_CLASS()

AVFILTER_DEFINE_CLASS ( aiir )

Variable Documentation

◆ format

const char* const format[] = { "%lf", "%lf %lfi", "%lf %lfr", "%lf %lfd", "%lf %lfi" }

static

Definition at line 445 of file af_aiir.c.

Referenced by get_response(), read_channels(), and read_zp_coefficients().

◆ inputs

const AVFilterPad inputs[]

static

Initial value:

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

Definition at line 1515 of file af_aiir.c.

◆ aiir_options

const AVOption aiir_options[]

static

Definition at line 1527 of file af_aiir.c.

◆ ff_af_aiir

const AVFilter ff_af_aiir

Initial value:

= {
    .name          = "aiir",
    .description   = NULL_IF_CONFIG_SMALL("Apply Infinite Impulse Response filter with supplied coefficients."),
    .priv_size     = sizeof(AudioIIRContext),
    .priv_class    = &aiir_class,
    .init          = init,
    .uninit        = uninit,
    FILTER_INPUTS(inputs),
    FILTER_QUERY_FUNC(query_formats),
    .flags         = AVFILTER_FLAG_DYNAMIC_OUTPUTS |
                     AVFILTER_FLAG_SLICE_THREADS,
}

Definition at line 1568 of file af_aiir.c.

Data Structures

Macros

Functions

Variables

Macro Definition Documentation

◆ IIR_CH

◆ SERIAL_IIR_CH

◆ PARALLEL_IIR_CH

◆ LATTICE_IIR_CH

◆ OFFSET

◆ AF

◆ VF

Function Documentation

◆ query_formats()

◆ count_coefficients()

◆ read_gains()

◆ read_tf_coefficients()

◆ read_zp_coefficients()

◆ read_channels()

◆ cmul()

◆ expand()

◆ normalize_coeffs()

◆ convert_zp2tf()

◆ decompose_zp2biquads()

◆ biquad_process()

◆ solve()

◆ convert_serial2parallel()

◆ convert_pr2zp()

◆ convert_sp2zp()

◆ fact()

◆ coef_sf2zf()

◆ convert_sf2tf()

◆ convert_pd2zp()

◆ check_stability()

◆ drawtext()

◆ draw_line()

◆ distance()

◆ get_response()

◆ draw_response()

◆ config_output()

◆ filter_frame()

◆ config_video()

◆ init()

◆ uninit()

◆ AVFILTER_DEFINE_CLASS()

Variable Documentation

◆ format

◆ inputs

◆ aiir_options

◆ ff_af_aiir