af_aiir.c File Reference

#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"

Go to the source code of this file.

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 []
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.

PARALLEL_IIR_CH

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

Definition at line 238 of file af_aiir.c.

LATTICE_IIR_CH

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

Definition at line 302 of file af_aiir.c.

OFFSET

#define OFFSET

(

x

)

offsetof(AudioIIRContext, x)

Definition at line 1535 of file af_aiir.c.

AF

#define AF   AV_OPT_FLAG_AUDIO_PARAM|AV_OPT_FLAG_FILTERING_PARAM

Definition at line 1536 of file af_aiir.c.

VF

#define VF   AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM

Definition at line 1537 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 359 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 373 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 406 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 431 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 458 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 505 of file af_aiir.c.

Referenced by expand().

expand()

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

static

Definition at line 511 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 538 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 566 of file af_aiir.c.

Referenced by config_output().

decompose_zp2biquads()

static int decompose_zp2biquads ( AVFilterContext *  ctx, int  channels  )

static

Definition at line 614 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 776 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 794 of file af_aiir.c.

Referenced by convert_serial2parallel().

convert_serial2parallel()

static int convert_serial2parallel ( AVFilterContext *  ctx, int  channels  )

static

Definition at line 828 of file af_aiir.c.

Referenced by config_output().

convert_pr2zp()

static void convert_pr2zp ( AVFilterContext *  ctx, int  channels  )

static

Definition at line 898 of file af_aiir.c.

Referenced by config_output().

convert_sp2zp()

static void convert_sp2zp ( AVFilterContext *  ctx, int  channels  )

static

Definition at line 925 of file af_aiir.c.

Referenced by config_output().

fact()

static double fact ( double  i )

static

Definition at line 952 of file af_aiir.c.

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

coef_sf2zf()

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

static

Definition at line 959 of file af_aiir.c.

Referenced by convert_sf2tf().

convert_sf2tf()

static void convert_sf2tf ( AVFilterContext *  ctx, int  channels  )

static

Definition at line 978 of file af_aiir.c.

Referenced by config_output().

convert_pd2zp()

static void convert_pd2zp ( AVFilterContext *  ctx, int  channels  )

static

Definition at line 1006 of file af_aiir.c.

Referenced by config_output().

check_stability()

static void check_stability ( AVFilterContext *  ctx, int  channels  )

static

Definition at line 1033 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 1052 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 1075 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 1101 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 1106 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 1153 of file af_aiir.c.

Referenced by config_output().

config_output()

static int config_output ( AVFilterLink *  outlink )

static

Definition at line 1270 of file af_aiir.c.

Referenced by init().

filter_frame()

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

static

Definition at line 1393 of file af_aiir.c.

config_video()

static int config_video ( AVFilterLink *  outlink )

static

Definition at line 1448 of file af_aiir.c.

Referenced by init().

init()

static av_cold int init ( AVFilterContext *  ctx )

static

Definition at line 1462 of file af_aiir.c.

uninit()

static av_cold void uninit ( AVFilterContext *  ctx )

static

Definition at line 1506 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 456 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 1526 of file af_aiir.c.

aiir_options

const AVOption aiir_options[]

static

Definition at line 1539 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 1580 of file af_aiir.c.