af_afftfilt.c File Reference

#include "libavutil/audio_fifo.h"
#include "libavutil/avstring.h"
#include "libavfilter/internal.h"
#include "libavutil/common.h"
#include "libavutil/cpu.h"
#include "libavutil/opt.h"
#include "libavutil/eval.h"
#include "libavutil/tx.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 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 []
const AVFilter	ff_af_afftfilt

Macro Definition Documentation

OFFSET

#define OFFSET

(

x

)

offsetof(AFFTFiltContext, x)

Definition at line 62 of file af_afftfilt.c.

A

#define A   AV_OPT_FLAG_AUDIO_PARAM|AV_OPT_FLAG_FILTERING_PARAM

Definition at line 63 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 60 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 76 of file af_afftfilt.c.

Referenced by realf().

getimag()

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

inlinestatic

Definition at line 87 of file af_afftfilt.c.

Referenced by imagf().

realf()

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

static

Definition at line 98 of file af_afftfilt.c.

imagf()

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

static

Definition at line 99 of file af_afftfilt.c.

config_input()

static int config_input ( AVFilterLink *  inlink )

static

Definition at line 104 of file af_afftfilt.c.

filter_frame()

static int filter_frame ( AVFilterLink *  inlink )

static

Definition at line 225 of file af_afftfilt.c.

Referenced by activate().

activate()

static int activate ( AVFilterContext *  ctx )

static

Definition at line 342 of file af_afftfilt.c.

uninit()

static av_cold void uninit ( AVFilterContext *  ctx )

static

Definition at line 399 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 59 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_OPTION("win_func", OFFSET(win_func), A, WFUNC_HANNING),
    { "overlap", "set window overlap", OFFSET(overlap), AV_OPT_TYPE_FLOAT, {.dbl=0.75}, 0,  1, A },
    { NULL },
}

Definition at line 65 of file af_afftfilt.c.

func2_names

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

static

Definition at line 101 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 102 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,
    },
}

Definition at line 432 of file af_afftfilt.c.

outputs

const AVFilterPad outputs[]

static

Initial value:

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

Definition at line 440 of file af_afftfilt.c.

ff_af_afftfilt

const 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,
    FILTER_INPUTS(inputs),
    FILTER_OUTPUTS(outputs),
    FILTER_SINGLE_SAMPLEFMT(AV_SAMPLE_FMT_FLTP),
    .activate        = activate,
    .uninit          = uninit,
    .flags           = AVFILTER_FLAG_SUPPORT_TIMELINE_INTERNAL,
}

Definition at line 447 of file af_afftfilt.c.