#include <float.h>
#include "libavutil/avassert.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	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	convert_pr2zp (AVFilterContext *ctx, int channels)

static void	convert_sp2zp (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 *	format [] = { "%lf", "%lf %lfi", "%lf %lfr", "%lf %lfd", "%lf %lfi" }

static const AVFilterPad	inputs []

static const AVOption	aiir_options []

AVFilter	ff_af_aiir

Macro Definition Documentation

◆ IIR_CH

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

Definition at line 123 of file af_aiir.c.

◆ SERIAL_IIR_CH

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

Definition at line 179 of file af_aiir.c.

◆ OFFSET

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

Definition at line 1215 of file af_aiir.c.

◆ AF

#define AF AV_OPT_FLAG_AUDIO_PARAM|AV_OPT_FLAG_FILTERING_PARAM

Definition at line 1216 of file af_aiir.c.

◆ VF

#define VF AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM

Definition at line 1217 of file af_aiir.c.

Function Documentation

◆ query_formats()

static int query_formats ( AVFilterContext * ctx )

static

Definition at line 79 of file af_aiir.c.

◆ count_coefficients()

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

static

Definition at line 242 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 256 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 289 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 314 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 341 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 388 of file af_aiir.c.

Referenced by expand().

◆ expand()

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

static

Definition at line 394 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 421 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 449 of file af_aiir.c.

Referenced by config_output().

◆ decompose_zp2biquads()

static int decompose_zp2biquads	(	AVFilterContext *	ctx,
		int	channels
	)

static

Definition at line 497 of file af_aiir.c.

Referenced by config_output().

◆ convert_pr2zp()

static void convert_pr2zp	(	AVFilterContext *	ctx,
		int	channels
	)

static

Definition at line 659 of file af_aiir.c.

Referenced by config_output().

◆ convert_sp2zp()

static void convert_sp2zp	(	AVFilterContext *	ctx,
		int	channels
	)

static

Definition at line 686 of file af_aiir.c.

Referenced by config_output().

◆ convert_pd2zp()

static void convert_pd2zp	(	AVFilterContext *	ctx,
		int	channels
	)

static

Definition at line 719 of file af_aiir.c.

Referenced by config_output().

◆ check_stability()

static void check_stability	(	AVFilterContext *	ctx,
		int	channels
	)

static

Definition at line 746 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 765 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 788 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 814 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 819 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 866 of file af_aiir.c.

Referenced by config_output().

◆ config_output()

static int config_output ( AVFilterLink * outlink )

static

Definition at line 983 of file af_aiir.c.

Referenced by init().

◆ filter_frame()

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

static

Definition at line 1073 of file af_aiir.c.

◆ config_video()

static int config_video ( AVFilterLink * outlink )

static

Definition at line 1128 of file af_aiir.c.

Referenced by init().

◆ init()

static av_cold int init ( AVFilterContext * ctx )

static

Definition at line 1142 of file af_aiir.c.

◆ uninit()

static av_cold void uninit ( AVFilterContext * ctx )

static

Definition at line 1186 of file af_aiir.c.

◆ AVFILTER_DEFINE_CLASS()

AVFILTER_DEFINE_CLASS ( aiir )

Variable Documentation

◆ format

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

static

Definition at line 339 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,
    },
    { NULL }
}

Definition at line 1206 of file af_aiir.c.

◆ aiir_options

const AVOption aiir_options[]

static

Definition at line 1219 of file af_aiir.c.

◆ ff_af_aiir

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,
    .query_formats = query_formats,
    .inputs        = inputs,
    .flags         = AVFILTER_FLAG_DYNAMIC_OUTPUTS |
                     AVFILTER_FLAG_SLICE_THREADS,
}

Definition at line 1257 of file af_aiir.c.

Data Structures

Macros

Functions

Variables

Macro Definition Documentation

◆ IIR_CH

◆ SERIAL_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()

◆ convert_pr2zp()

◆ convert_sp2zp()

◆ 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