af_afreqshift.c File Reference

#include "libavutil/channel_layout.h"
#include "libavutil/ffmath.h"
#include "libavutil/opt.h"
#include "avfilter.h"
#include "audio.h"
#include "filters.h"

Go to the source code of this file.

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

Macros
#define	MAX_NB_COEFFS   16
#define	PFILTER(name, type, sin, cos, cc)
#define	FFILTER(name, type, sin, cos, fmod, cc)
#define	OFFSET(x)
#define	FLAGS   AV_OPT_FLAG_AUDIO_PARAM|AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_RUNTIME_PARAM

Functions
static void	compute_transition_param (double *K, double *Q, double transition)
static double	ipowp (double x, int64_t n)
static double	compute_acc_num (double q, int order, int c)
static double	compute_acc_den (double q, int order, int c)
static double	compute_coef (int index, double k, double q, int order)
static void	compute_coefs (double *coef_arrd, float *coef_arrf, int nbr_coefs, double transition)
static int	config_input (AVFilterLink *inlink)
static int	filter_channels (AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
static int	filter_frame (AVFilterLink *inlink, AVFrame *in)
static av_cold void	uninit (AVFilterContext *ctx)
	AVFILTER_DEFINE_CLASS (afreqshift)
	AVFILTER_DEFINE_CLASS (aphaseshift)

Variables
static enum AVSampleFormat	sample_fmts []
static const AVOption	afreqshift_options []
static const AVFilterPad	inputs []
const FFFilter	ff_af_afreqshift
static const AVOption	aphaseshift_options []
const FFFilter	ff_af_aphaseshift

Macro Definition Documentation

MAX_NB_COEFFS

#define MAX_NB_COEFFS   16

Definition at line 29 of file af_afreqshift.c.

Referenced by config_input().

PFILTER

#define PFILTER	(		name,
			type,
			sin,
			cos,
			cc )

Definition at line 56 of file af_afreqshift.c.

FFILTER

#define FFILTER	(		name,
			type,
			sin,
			cos,
			fmod,
			cc )

Definition at line 106 of file af_afreqshift.c.

OFFSET

#define OFFSET

(

x

)

Value:

offsetof(AFreqShift, x)

Definition at line 348 of file af_afreqshift.c.

FLAGS

#define FLAGS   AV_OPT_FLAG_AUDIO_PARAM|AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_RUNTIME_PARAM

Definition at line 349 of file af_afreqshift.c.

Function Documentation

compute_transition_param()

static void compute_transition_param ( double * K, double * Q, double transition )

static

Definition at line 157 of file af_afreqshift.c.

Referenced by compute_coefs(), and compute_transition_param().

ipowp()

static double ipowp ( double x, int64_t n )

static

Definition at line 173 of file af_afreqshift.c.

Referenced by compute_acc_den(), and compute_acc_num().

compute_acc_num()

static double compute_acc_num ( double q, int order, int c )

static

Definition at line 187 of file af_afreqshift.c.

Referenced by compute_coef().

compute_acc_den()

static double compute_acc_den ( double q, int order, int c )

static

Definition at line 206 of file af_afreqshift.c.

Referenced by compute_coef().

compute_coef()

static double compute_coef ( int index, double k, double q, int order )

static

Definition at line 225 of file af_afreqshift.c.

Referenced by compute_coefs().

compute_coefs()

static void compute_coefs ( double * coef_arrd, float * coef_arrf, int nbr_coefs, double transition )

static

Definition at line 239 of file af_afreqshift.c.

Referenced by config_input(), and filter_frame().

config_input()

static int config_input ( AVFilterLink * inlink )

static

Definition at line 254 of file af_afreqshift.c.

filter_channels()

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

static

Definition at line 289 of file af_afreqshift.c.

filter_frame()

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

static

Definition at line 304 of file af_afreqshift.c.

uninit()

static av_cold void uninit ( AVFilterContext * ctx )

static

Definition at line 338 of file af_afreqshift.c.

AVFILTER_DEFINE_CLASS() [1/2]

AVFILTER_DEFINE_CLASS

(

afreqshift

)

AVFILTER_DEFINE_CLASS() [2/2]

AVFILTER_DEFINE_CLASS

(

aphaseshift

)

Variable Documentation

sample_fmts

enum AVSampleFormat sample_fmts[]

static

Initial value:

= {
    AV_SAMPLE_FMT_FLTP, AV_SAMPLE_FMT_DBLP, AV_SAMPLE_FMT_NONE
}

Definition at line 52 of file af_afreqshift.c.

afreqshift_options

const AVOption afreqshift_options[]

static

Initial value:

= {
    { "shift", "set frequency shift", OFFSET(shift), AV_OPT_TYPE_DOUBLE, {.dbl=0}, -INT_MAX, INT_MAX, FLAGS },
    { "level", "set output level",    OFFSET(level), AV_OPT_TYPE_DOUBLE, {.dbl=1},      0.0,     1.0, FLAGS },
    { "order", "set filter order",    OFFSET(nb_coeffs),AV_OPT_TYPE_INT, {.i64=8},  1, MAX_NB_COEFFS, FLAGS },
    { NULL }
}

Definition at line 351 of file af_afreqshift.c.

inputs

const AVFilterPad inputs[]

static

Initial value:

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

Definition at line 360 of file af_afreqshift.c.

ff_af_afreqshift

const FFFilter ff_af_afreqshift

Initial value:

= {
    .p.name          = "afreqshift",
    .p.description   = NULL_IF_CONFIG_SMALL("Apply frequency shifting to input audio."),
    .p.priv_class    = &afreqshift_class,
    .p.flags         = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC |
                       AVFILTER_FLAG_SLICE_THREADS,
    .priv_size       = sizeof(AFreqShift),
    .uninit          = uninit,
    FILTER_INPUTS(inputs),
    FILTER_OUTPUTS(ff_audio_default_filterpad),
    FILTER_SAMPLEFMTS_ARRAY(sample_fmts),
    .process_command = ff_filter_process_command,
}

Definition at line 369 of file af_afreqshift.c.

aphaseshift_options

const AVOption aphaseshift_options[]

static

Initial value:

= {
    { "shift", "set phase shift", OFFSET(shift), AV_OPT_TYPE_DOUBLE, {.dbl=0}, -1.0, 1.0, FLAGS },
    { "level", "set output level",OFFSET(level), AV_OPT_TYPE_DOUBLE, {.dbl=1},  0.0, 1.0, FLAGS },
    { "order", "set filter order",OFFSET(nb_coeffs), AV_OPT_TYPE_INT,{.i64=8},    1, MAX_NB_COEFFS, FLAGS },
    { NULL }
}

Definition at line 383 of file af_afreqshift.c.

ff_af_aphaseshift

const FFFilter ff_af_aphaseshift

Initial value:

= {
    .p.name          = "aphaseshift",
    .p.description   = NULL_IF_CONFIG_SMALL("Apply phase shifting to input audio."),
    .p.priv_class    = &aphaseshift_class,
    .p.flags         = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC |
                       AVFILTER_FLAG_SLICE_THREADS,
    .priv_size       = sizeof(AFreqShift),
    .uninit          = uninit,
    FILTER_INPUTS(inputs),
    FILTER_OUTPUTS(ff_audio_default_filterpad),
    FILTER_SAMPLEFMTS_ARRAY(sample_fmts),
    .process_command = ff_filter_process_command,
}

Definition at line 392 of file af_afreqshift.c.