af_afftfilt.c File Reference

#include "libavutil/audio_fifo.h"
#include "libavutil/avstring.h"
#include "libavfilter/internal.h"
#include "libavutil/common.h"
#include "libavutil/opt.h"
#include "libavcodec/avfft.h"
#include "libavutil/eval.h"
#include "audio.h"
#include "filters.h"
#include "window_func.h"

Go to the source code of this file.

Data Structures
struct	AFFTFiltContext

Macros
#define	OFFSET(x)   offsetof(AFFTFiltContext, x)
#define	A   AV_OPT_FLAG_AUDIO_PARAM|AV_OPT_FLAG_FILTERING_PARAM

Enumerations
enum	{   VAR_SAMPLE_RATE, VAR_BIN, VAR_NBBINS, VAR_CHANNEL,   VAR_CHANNELS, VAR_PTS, VAR_REAL, VAR_IMAG,   VAR_VARS_NB }

Functions
	AVFILTER_DEFINE_CLASS (afftfilt)
static double	getreal (void *priv, double x, double ch)
static double	getimag (void *priv, double x, double ch)
static double	realf (void *priv, double x, double ch)
static double	imagf (void *priv, double x, double ch)
static int	config_input (AVFilterLink *inlink)
static int	filter_frame (AVFilterLink *inlink)
static int	activate (AVFilterContext *ctx)
static int	query_formats (AVFilterContext *ctx)
static av_cold void	uninit (AVFilterContext *ctx)

Variables
static const char *const	var_names [] = { "sr", "b", "nb", "ch", "chs", "pts", "re", "im", NULL }
static const AVOption	afftfilt_options []
static const char *const	func2_names [] = { "real", "imag", NULL }
static double(*const	func2 [])(void *, double, double) = { realf, imagf, NULL }
static const AVFilterPad	inputs []
static const AVFilterPad	outputs []
AVFilter	ff_af_afftfilt

Macro Definition Documentation

OFFSET

#define OFFSET

(

x

)

offsetof(AFFTFiltContext, x)

Definition at line 60 of file af_afftfilt.c.

A

#define A   AV_OPT_FLAG_AUDIO_PARAM|AV_OPT_FLAG_FILTERING_PARAM

Definition at line 61 of file af_afftfilt.c.

Enumeration Type Documentation

anonymous enum

anonymous enum

Enumerator
VAR_SAMPLE_RATE
VAR_BIN
VAR_NBBINS
VAR_CHANNEL
VAR_CHANNELS
VAR_PTS
VAR_REAL
VAR_IMAG
VAR_VARS_NB

Definition at line 58 of file af_afftfilt.c.

Function Documentation

AVFILTER_DEFINE_CLASS()

AVFILTER_DEFINE_CLASS

(

afftfilt

)

getreal()

static double getreal ( void *  priv, double  x, double  ch  )

inlinestatic

Definition at line 95 of file af_afftfilt.c.

Referenced by realf().

getimag()

static double getimag ( void *  priv, double  x, double  ch  )

inlinestatic

Definition at line 106 of file af_afftfilt.c.

Referenced by imagf().

realf()

static double realf ( void *  priv, double  x, double  ch  )

static

Definition at line 117 of file af_afftfilt.c.

imagf()

static double imagf ( void *  priv, double  x, double  ch  )

static

Definition at line 118 of file af_afftfilt.c.

config_input()

static int config_input ( AVFilterLink *  inlink )

static

Definition at line 123 of file af_afftfilt.c.

filter_frame()

static int filter_frame ( AVFilterLink *  inlink )

static

Definition at line 234 of file af_afftfilt.c.

Referenced by activate().

activate()

static int activate ( AVFilterContext *  ctx )

static

Definition at line 345 of file af_afftfilt.c.

query_formats()

static int query_formats ( AVFilterContext *  ctx )

static

Definition at line 402 of file af_afftfilt.c.

uninit()

static av_cold void uninit ( AVFilterContext *  ctx )

static

Definition at line 432 of file af_afftfilt.c.

Variable Documentation

var_names

const char* const var_names[] = { "sr", "b", "nb", "ch", "chs", "pts", "re", "im", NULL }

static

Definition at line 57 of file af_afftfilt.c.

Referenced by config_input().

afftfilt_options

const AVOption afftfilt_options[]

static

Initial value:

= {
    { "real", "set channels real expressions",       OFFSET(real_str), AV_OPT_TYPE_STRING, {.str = "re" }, 0, 0, A },
    { "imag", "set channels imaginary expressions",  OFFSET(img_str),  AV_OPT_TYPE_STRING, {.str = "im" }, 0, 0, A },
    { "win_size", "set window size", OFFSET(fft_size), AV_OPT_TYPE_INT, {.i64=4096}, 16, 131072, A },
    { "win_func", "set window function", OFFSET(win_func), AV_OPT_TYPE_INT, {.i64 = WFUNC_HANNING}, 0, NB_WFUNC-1, A, "win_func" },
        { "rect",     "Rectangular",      0, AV_OPT_TYPE_CONST, {.i64=WFUNC_RECT},     0, 0, A, "win_func" },
        { "bartlett", "Bartlett",         0, AV_OPT_TYPE_CONST, {.i64=WFUNC_BARTLETT}, 0, 0, A, "win_func" },
        { "hann",     "Hann",             0, AV_OPT_TYPE_CONST, {.i64=WFUNC_HANNING},  0, 0, A, "win_func" },
        { "hanning",  "Hanning",          0, AV_OPT_TYPE_CONST, {.i64=WFUNC_HANNING},  0, 0, A, "win_func" },
        { "hamming",  "Hamming",          0, AV_OPT_TYPE_CONST, {.i64=WFUNC_HAMMING},  0, 0, A, "win_func" },
        { "blackman", "Blackman",         0, AV_OPT_TYPE_CONST, {.i64=WFUNC_BLACKMAN}, 0, 0, A, "win_func" },
        { "welch",    "Welch",            0, AV_OPT_TYPE_CONST, {.i64=WFUNC_WELCH},    0, 0, A, "win_func" },
        { "flattop",  "Flat-top",         0, AV_OPT_TYPE_CONST, {.i64=WFUNC_FLATTOP},  0, 0, A, "win_func" },
        { "bharris",  "Blackman-Harris",  0, AV_OPT_TYPE_CONST, {.i64=WFUNC_BHARRIS},  0, 0, A, "win_func" },
        { "bnuttall", "Blackman-Nuttall", 0, AV_OPT_TYPE_CONST, {.i64=WFUNC_BNUTTALL}, 0, 0, A, "win_func" },
        { "bhann",    "Bartlett-Hann",    0, AV_OPT_TYPE_CONST, {.i64=WFUNC_BHANN},    0, 0, A, "win_func" },
        { "sine",     "Sine",             0, AV_OPT_TYPE_CONST, {.i64=WFUNC_SINE},     0, 0, A, "win_func" },
        { "nuttall",  "Nuttall",          0, AV_OPT_TYPE_CONST, {.i64=WFUNC_NUTTALL},  0, 0, A, "win_func" },
        { "lanczos",  "Lanczos",          0, AV_OPT_TYPE_CONST, {.i64=WFUNC_LANCZOS},  0, 0, A, "win_func" },
        { "gauss",    "Gauss",            0, AV_OPT_TYPE_CONST, {.i64=WFUNC_GAUSS},    0, 0, A, "win_func" },
        { "tukey",    "Tukey",            0, AV_OPT_TYPE_CONST, {.i64=WFUNC_TUKEY},    0, 0, A, "win_func" },
        { "dolph",    "Dolph-Chebyshev",  0, AV_OPT_TYPE_CONST, {.i64=WFUNC_DOLPH},    0, 0, A, "win_func" },
        { "cauchy",   "Cauchy",           0, AV_OPT_TYPE_CONST, {.i64=WFUNC_CAUCHY},   0, 0, A, "win_func" },
        { "parzen",   "Parzen",           0, AV_OPT_TYPE_CONST, {.i64=WFUNC_PARZEN},   0, 0, A, "win_func" },
        { "poisson",  "Poisson",          0, AV_OPT_TYPE_CONST, {.i64=WFUNC_POISSON},  0, 0, A, "win_func" },
        { "bohman",   "Bohman",           0, AV_OPT_TYPE_CONST, {.i64=WFUNC_BOHMAN},   0, 0, A, "win_func" },
    { "overlap", "set window overlap", OFFSET(overlap), AV_OPT_TYPE_FLOAT, {.dbl=0.75}, 0,  1, A },
    { NULL },
}

Definition at line 63 of file af_afftfilt.c.

func2_names

const char* const func2_names[] = { "real", "imag", NULL }

static

Definition at line 120 of file af_afftfilt.c.

Referenced by av_expr_parse(), av_expr_parse_and_eval(), config_input(), config_output(), geq_init(), and initialize().

func2

double(*const func2[])(void *, double, double) = { realf, imagf, NULL }

static

Definition at line 121 of file af_afftfilt.c.

Referenced by config_input(), config_output(), ff_slice_thread_execute_with_mainfunc(), geq_init(), initialize(), and thread_execute2().

inputs

const AVFilterPad inputs[]

static

Initial value:

= {
    {
        .name         = "default",
        .type         = AVMEDIA_TYPE_AUDIO,
        .config_props = config_input,
    },
    { NULL }
}

Definition at line 462 of file af_afftfilt.c.

outputs

const AVFilterPad outputs[]

static

Initial value:

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

Definition at line 471 of file af_afftfilt.c.

ff_af_afftfilt

AVFilter ff_af_afftfilt

Initial value:

= {
    .name            = "afftfilt",
    .description     = NULL_IF_CONFIG_SMALL("Apply arbitrary expressions to samples in frequency domain."),
    .priv_size       = sizeof(AFFTFiltContext),
    .priv_class      = &afftfilt_class,
    .inputs          = inputs,
    .outputs         = outputs,
    .activate        = activate,
    .query_formats   = query_formats,
    .uninit          = uninit,
}

Definition at line 479 of file af_afftfilt.c.