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 "formats.h"

Go to the source code of this file.

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

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

Functions
static int	query_formats (AVFilterContext *ctx)
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 const AVOption	afreqshift_options []
static const AVFilterPad	inputs []
static const AVFilterPad	outputs []
AVFilter	ff_af_afreqshift
static const AVOption	aphaseshift_options []
AVFilter	ff_af_aphaseshift

Macro Definition Documentation

NB_COEFS

#define NB_COEFS   16

Definition at line 29 of file af_afreqshift.c.

PFILTER

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

Definition at line 80 of file af_afreqshift.c.

FFILTER

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

Definition at line 129 of file af_afreqshift.c.

OFFSET

#define OFFSET

(

x

)

offsetof(AFreqShift, x)

Definition at line 364 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 365 of file af_afreqshift.c.

Function Documentation

query_formats()

static int query_formats ( AVFilterContext *  ctx )

static

Definition at line 50 of file af_afreqshift.c.

compute_transition_param()

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

static

Definition at line 179 of file af_afreqshift.c.

Referenced by compute_coefs().

ipowp()

static double ipowp ( double  x, int64_t  n  )

static

Definition at line 195 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 209 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 228 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 247 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 261 of file af_afreqshift.c.

Referenced by config_input().

config_input()

static int config_input ( AVFilterLink *  inlink )

static

Definition at line 276 of file af_afreqshift.c.

filter_channels()

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

static

Definition at line 309 of file af_afreqshift.c.

Referenced by filter_frame().

filter_frame()

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

static

Definition at line 324 of file af_afreqshift.c.

uninit()

static av_cold void uninit ( AVFilterContext *  ctx )

static

Definition at line 354 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

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 },
    { NULL }
}

Definition at line 367 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,
    },
    { NULL }
}

Definition at line 375 of file af_afreqshift.c.

outputs

const AVFilterPad outputs[]

static

Initial value:

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

Definition at line 385 of file af_afreqshift.c.

ff_af_afreqshift

AVFilter ff_af_afreqshift

Initial value:

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

Definition at line 393 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 },
    { NULL }
}

Definition at line 407 of file af_afreqshift.c.

ff_af_aphaseshift

AVFilter ff_af_aphaseshift

Initial value:

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

Definition at line 415 of file af_afreqshift.c.