af_biquads.c File Reference

#include "config_components.h"
#include "libavutil/avassert.h"
#include "libavutil/channel_layout.h"
#include "libavutil/ffmath.h"
#include "libavutil/opt.h"
#include "audio.h"
#include "avfilter.h"
#include "filters.h"
#include "formats.h"
#include "internal.h"

Go to the source code of this file.

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

Macros
#define	BIQUAD_FILTER(name, type, ftype, min, max, need_clipping)
#define	BIQUAD_DII_FILTER(name, type, ftype, min, max, need_clipping)
#define	BIQUAD_TDI_FILTER(name, type, ftype, min, max, need_clipping)
#define	BIQUAD_TDII_FILTER(name, type, ftype, min, max, need_clipping)
#define	BIQUAD_LATT_FILTER(name, type, ftype, min, max, need_clipping)
#define	BIQUAD_SVF_FILTER(name, type, ftype, min, max, need_clipping)
#define	BIQUAD_ZDF_FILTER(name, type, ftype, min, max, need_clipping, two)
#define	OFFSET(x)   offsetof(BiquadsContext, x)
#define	FLAGS   AV_OPT_FLAG_AUDIO_PARAM|AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_RUNTIME_PARAM
#define	AF   AV_OPT_FLAG_AUDIO_PARAM|AV_OPT_FLAG_FILTERING_PARAM
#define	DEFINE_BIQUAD_FILTER_2(name_, description_, priv_class_)
#define	DEFINE_BIQUAD_FILTER(name, description)
#define	WIDTH_OPTION(x)
#define	WIDTH_TYPE_OPTION(x)
#define	MIX_CHANNELS_NORMALIZE_OPTION(x, y, z)
#define	TRANSFORM_OPTION(x)
#define	PRECISION_OPTION(x)
#define	BLOCKSIZE_OPTION(x)

Enumerations
enum	FilterType {   DC_TYPE, AC_TYPE, SQ_TYPE, PS_TYPE,   NB_TYPES, BUTTERWORTH, CHEBYSHEV1, CHEBYSHEV2,   NB_TYPES, biquad, equalizer, bass,   treble, bandpass, bandreject, allpass,   highpass, lowpass, lowshelf, highshelf,   tiltshelf, WEAK, STRONG, NB_FILTER,   LOWPASS, FLAT, AFLAT, CHROMA,   COLOR, ACOLOR, XFLAT, YFLAT,   NB_FILTERS }
enum	WidthType {   NONE, HERTZ, OCTAVE, QFACTOR,   SLOPE, KHERTZ, NB_WTYPE }
enum	TransformType {   PREDICTOR_TRANSFORM = 0, COLOR_TRANSFORM = 1, SUBTRACT_GREEN = 2, COLOR_INDEXING_TRANSFORM = 3,   DI, DII, TDI, TDII,   LATT, SVF, ZDF, NB_TTYPE }

Functions
static int	query_formats (AVFilterContext *ctx)
static void	convert_dir2latt (BiquadsContext *s)
static void	convert_dir2svf (BiquadsContext *s)
static double	convert_width2qfactor (double width, double frequency, double gain, double sample_rate, int width_type)
static void	convert_dir2zdf (BiquadsContext *s, int sample_rate)
static int	config_filter (AVFilterLink *outlink, int reset)
static int	config_output (AVFilterLink *outlink)
static void	reverse_samples (AVFrame *out, AVFrame *in, int p, int oo, int io, int nb_samples)
static int	filter_channel (AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
static int	filter_frame (AVFilterLink *inlink, AVFrame *buf, int eof)
static int	activate (AVFilterContext *ctx)
static int	process_command (AVFilterContext *ctx, const char *cmd, const char *args, char *res, int res_len, int flags)
static av_cold void	uninit (AVFilterContext *ctx)

Variables
static const AVFilterPad	outputs []

Macro Definition Documentation

BIQUAD_FILTER

#define BIQUAD_FILTER	(		name,
			type,
			ftype,
			min,
			max,
			need_clipping
	)

Definition at line 200 of file af_biquads.c.

BIQUAD_DII_FILTER

#define BIQUAD_DII_FILTER	(		name,
			type,
			ftype,
			min,
			max,
			need_clipping
	)

Definition at line 282 of file af_biquads.c.

BIQUAD_TDI_FILTER

#define BIQUAD_TDI_FILTER	(		name,
			type,
			ftype,
			min,
			max,
			need_clipping
	)

Definition at line 331 of file af_biquads.c.

BIQUAD_TDII_FILTER

#define BIQUAD_TDII_FILTER	(		name,
			type,
			ftype,
			min,
			max,
			need_clipping
	)

Definition at line 388 of file af_biquads.c.

BIQUAD_LATT_FILTER

#define BIQUAD_LATT_FILTER	(		name,
			type,
			ftype,
			min,
			max,
			need_clipping
	)

Definition at line 436 of file af_biquads.c.

BIQUAD_SVF_FILTER

#define BIQUAD_SVF_FILTER	(		name,
			type,
			ftype,
			min,
			max,
			need_clipping
	)

Definition at line 495 of file af_biquads.c.

BIQUAD_ZDF_FILTER

#define BIQUAD_ZDF_FILTER	(		name,
			type,
			ftype,
			min,
			max,
			need_clipping,
			two
	)

Definition at line 547 of file af_biquads.c.

OFFSET

#define OFFSET

(

x

)

offsetof(BiquadsContext, x)

Definition at line 1443 of file af_biquads.c.

FLAGS

#define FLAGS   AV_OPT_FLAG_AUDIO_PARAM|AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_RUNTIME_PARAM

Definition at line 1444 of file af_biquads.c.

AF

#define AF   AV_OPT_FLAG_AUDIO_PARAM|AV_OPT_FLAG_FILTERING_PARAM

Definition at line 1445 of file af_biquads.c.

DEFINE_BIQUAD_FILTER_2

#define DEFINE_BIQUAD_FILTER_2	(		name_,
			description_,
			priv_class_
	)

Value:

static av_cold int name_##_init(AVFilterContext *ctx)                   \
{                                                                       \
    BiquadsContext *s = ctx->priv;                                      \
    s->filter_type = name_;                                             \
    s->pts = AV_NOPTS_VALUE;                                            \
    return 0;                                                           \
}                                                                       \
                                                         \
const AVFilter ff_af_##name_ = {                         \
    .name          = #name_,                             \
    .description   = NULL_IF_CONFIG_SMALL(description_), \
    .priv_class    = &priv_class_##_class,               \
    .priv_size     = sizeof(BiquadsContext),             \
    .init          = name_##_init,                       \
    .activate      = activate,                           \
    .uninit        = uninit,                             \
    FILTER_INPUTS(ff_audio_default_filterpad),           \
    FILTER_OUTPUTS(outputs),                             \
    FILTER_QUERY_FUNC(query_formats),                    \
    .process_command = process_command,                  \
    .flags         = AVFILTER_FLAG_SLICE_THREADS | AVFILTER_FLAG_SUPPORT_TIMELINE_INTERNAL, \
}

Definition at line 1447 of file af_biquads.c.

DEFINE_BIQUAD_FILTER

#define DEFINE_BIQUAD_FILTER	(		name,
			description
	)

Value:

    AVFILTER_DEFINE_CLASS(name);                                        \
    DEFINE_BIQUAD_FILTER_2(name, description, name)

Definition at line 1471 of file af_biquads.c.

WIDTH_OPTION

#define WIDTH_OPTION

(

x

)

Value:

    {"width", "set width", OFFSET(width), AV_OPT_TYPE_DOUBLE, {.dbl=x}, 0, 99999, FLAGS}, \
    {"w",     "set width", OFFSET(width), AV_OPT_TYPE_DOUBLE, {.dbl=x}, 0, 99999, FLAGS}

Definition at line 1475 of file af_biquads.c.

WIDTH_TYPE_OPTION

#define WIDTH_TYPE_OPTION

(

x

)

Value:

    {"width_type", "set filter-width type", OFFSET(width_type), AV_OPT_TYPE_INT, {.i64=x}, HERTZ, NB_WTYPE-1, FLAGS, .unit = "width_type"}, \
    {"t",          "set filter-width type", OFFSET(width_type), AV_OPT_TYPE_INT, {.i64=x}, HERTZ, NB_WTYPE-1, FLAGS, .unit = "width_type"}, \
    {"h", "Hz", 0, AV_OPT_TYPE_CONST, {.i64=HERTZ}, 0, 0, FLAGS, .unit = "width_type"},                                                     \
    {"q", "Q-Factor", 0, AV_OPT_TYPE_CONST, {.i64=QFACTOR}, 0, 0, FLAGS, .unit = "width_type"},                                             \
    {"o", "octave", 0, AV_OPT_TYPE_CONST, {.i64=OCTAVE}, 0, 0, FLAGS, .unit = "width_type"},                                                \
    {"s", "slope", 0, AV_OPT_TYPE_CONST, {.i64=SLOPE}, 0, 0, FLAGS, .unit = "width_type"},                                                  \
    {"k", "kHz", 0, AV_OPT_TYPE_CONST, {.i64=KHERTZ}, 0, 0, FLAGS, .unit = "width_type"}

Definition at line 1479 of file af_biquads.c.

MIX_CHANNELS_NORMALIZE_OPTION

#define MIX_CHANNELS_NORMALIZE_OPTION	(		x,
			y,
			z
	)

Value:

    {"mix", "set mix", OFFSET(mix), AV_OPT_TYPE_DOUBLE, {.dbl=x}, 0, 1, FLAGS},                               \
    {"m",   "set mix", OFFSET(mix), AV_OPT_TYPE_DOUBLE, {.dbl=x}, 0, 1, FLAGS},                               \
    {"channels", "set channels to filter", OFFSET(ch_layout_str), AV_OPT_TYPE_STRING, {.str=y}, 0, 0, FLAGS}, \
    {"c",        "set channels to filter", OFFSET(ch_layout_str), AV_OPT_TYPE_STRING, {.str=y}, 0, 0, FLAGS}, \
    {"normalize", "normalize coefficients", OFFSET(normalize), AV_OPT_TYPE_BOOL, {.i64=z}, 0, 1, FLAGS},      \
    {"n",         "normalize coefficients", OFFSET(normalize), AV_OPT_TYPE_BOOL, {.i64=z}, 0, 1, FLAGS}

Definition at line 1488 of file af_biquads.c.

TRANSFORM_OPTION

#define TRANSFORM_OPTION

(

x

)

Value:

    {"transform", "set transform type", OFFSET(transform_type), AV_OPT_TYPE_INT, {.i64=x}, 0, NB_TTYPE-1, AF, .unit = "transform_type"}, \
    {"a",         "set transform type", OFFSET(transform_type), AV_OPT_TYPE_INT, {.i64=x}, 0, NB_TTYPE-1, AF, .unit = "transform_type"}, \
    {"di",   "direct form I",  0, AV_OPT_TYPE_CONST, {.i64=DI}, 0, 0, AF, .unit = "transform_type"},                                     \
    {"dii",  "direct form II", 0, AV_OPT_TYPE_CONST, {.i64=DII}, 0, 0, AF, .unit = "transform_type"},                                    \
    {"tdi",  "transposed direct form I",  0, AV_OPT_TYPE_CONST, {.i64=TDI},  0, 0, AF, .unit = "transform_type"},                        \
    {"tdii", "transposed direct form II", 0, AV_OPT_TYPE_CONST, {.i64=TDII}, 0, 0, AF, .unit = "transform_type"},                        \
    {"latt", "lattice-ladder form", 0, AV_OPT_TYPE_CONST, {.i64=LATT}, 0, 0, AF, .unit = "transform_type"},                              \
    {"svf",  "state variable filter form", 0, AV_OPT_TYPE_CONST, {.i64=SVF}, 0, 0, AF, .unit = "transform_type"},                        \
    {"zdf",  "zero-delay filter form", 0, AV_OPT_TYPE_CONST, {.i64=ZDF}, 0, 0, AF, .unit = "transform_type"}

Definition at line 1496 of file af_biquads.c.

PRECISION_OPTION

#define PRECISION_OPTION

(

x

)

Value:

    {"precision", "set filtering precision", OFFSET(precision), AV_OPT_TYPE_INT, {.i64=x}, -1, 3, AF, .unit = "precision"},   \
    {"r",         "set filtering precision", OFFSET(precision), AV_OPT_TYPE_INT, {.i64=x}, -1, 3, AF, .unit = "precision"},   \
    {"auto", "automatic",            0, AV_OPT_TYPE_CONST, {.i64=-1}, 0, 0, AF, .unit = "precision"},                         \
    {"s16", "signed 16-bit",         0, AV_OPT_TYPE_CONST, {.i64=0},  0, 0, AF, .unit = "precision"},                         \
    {"s32", "signed 32-bit",         0, AV_OPT_TYPE_CONST, {.i64=1},  0, 0, AF, .unit = "precision"},                         \
    {"f32", "floating-point single", 0, AV_OPT_TYPE_CONST, {.i64=2},  0, 0, AF, .unit = "precision"},                         \
    {"f64", "floating-point double", 0, AV_OPT_TYPE_CONST, {.i64=3},  0, 0, AF, .unit = "precision"}

Definition at line 1507 of file af_biquads.c.

BLOCKSIZE_OPTION

#define BLOCKSIZE_OPTION

(

x

)

Value:

    {"blocksize", "set the block size", OFFSET(block_samples), AV_OPT_TYPE_INT, {.i64=x}, 0, 32768, AF}, \
    {"b",         "set the block size", OFFSET(block_samples), AV_OPT_TYPE_INT, {.i64=x}, 0, 32768, AF}

Definition at line 1516 of file af_biquads.c.

Enumeration Type Documentation

FilterType

enum FilterType

Enumerator
DC_TYPE
AC_TYPE
SQ_TYPE
PS_TYPE
NB_TYPES
BUTTERWORTH
CHEBYSHEV1
CHEBYSHEV2
NB_TYPES
biquad
equalizer
bass
treble
bandpass
bandreject
allpass
highpass
lowpass
lowshelf
highshelf
tiltshelf
WEAK
STRONG
NB_FILTER
LOWPASS
FLAT
AFLAT
CHROMA
COLOR
ACOLOR
XFLAT
YFLAT
NB_FILTERS

Definition at line 77 of file af_biquads.c.

WidthType

enum WidthType

Enumerator
NONE
HERTZ
OCTAVE
QFACTOR
SLOPE
KHERTZ
NB_WTYPE

Definition at line 92 of file af_biquads.c.

TransformType

enum TransformType

Enumerator
PREDICTOR_TRANSFORM
COLOR_TRANSFORM
SUBTRACT_GREEN
COLOR_INDEXING_TRANSFORM
DI
DII
TDI
TDII
LATT
SVF
ZDF
NB_TTYPE

Definition at line 102 of file af_biquads.c.

Function Documentation

query_formats()

static int query_formats ( AVFilterContext *  ctx )

static

Definition at line 157 of file af_biquads.c.

convert_dir2latt()

static void convert_dir2latt ( BiquadsContext *  s )

static

Definition at line 602 of file af_biquads.c.

Referenced by config_filter().

convert_dir2svf()

static void convert_dir2svf ( BiquadsContext *  s )

static

Definition at line 619 of file af_biquads.c.

Referenced by config_filter().

convert_width2qfactor()

static double convert_width2qfactor ( double  width, double  frequency, double  gain, double  sample_rate, int  width_type  )

static

Definition at line 637 of file af_biquads.c.

Referenced by convert_dir2zdf().

convert_dir2zdf()

static void convert_dir2zdf ( BiquadsContext *  s, int  sample_rate  )

static

Definition at line 672 of file af_biquads.c.

Referenced by config_filter().

config_filter()

static int config_filter ( AVFilterLink *  outlink, int  reset  )

static

Definition at line 796 of file af_biquads.c.

Referenced by config_output(), and process_command().

config_output()

static int config_output ( AVFilterLink *  outlink )

static

Definition at line 1193 of file af_biquads.c.

reverse_samples()

static void reverse_samples ( AVFrame *  out, AVFrame *  in, int  p, int  oo, int  io, int  nb_samples  )

static

Definition at line 1203 of file af_biquads.c.

Referenced by filter_channel().

filter_channel()

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

static

Definition at line 1238 of file af_biquads.c.

Referenced by filter_frame().

filter_frame()

static int filter_frame ( AVFilterLink *  inlink, AVFrame *  buf, int  eof  )

static

Definition at line 1295 of file af_biquads.c.

Referenced by activate().

activate()

static int activate ( AVFilterContext *  ctx )

static

Definition at line 1364 of file af_biquads.c.

process_command()

static int process_command ( AVFilterContext *  ctx, const char *  cmd, const char *  args, char *  res, int  res_len, int  flags  )

static

Definition at line 1410 of file af_biquads.c.

uninit()

static av_cold void uninit ( AVFilterContext *  ctx )

static

Definition at line 1423 of file af_biquads.c.

Variable Documentation

outputs

const AVFilterPad outputs[]

static

Initial value:

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

Definition at line 1435 of file af_biquads.c.