af_atilt.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	Coeffs
struct	ATiltContext
struct	ThreadData
	Used for passing data between threads. More...

Macros
#define	MAX_ORDER   30
#define	FILTER(name, type)
#define	OFFSET(x)   offsetof(ATiltContext, x)
#define	FLAGS   AV_OPT_FLAG_AUDIO_PARAM|AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_RUNTIME_PARAM

Functions
static double	prewarp (double w, double T, double wp)
static double	mz (int i, double w0, double r, double alpha)
static double	mp (int i, double w0, double r)
static double	mzh (int i, double T, double w0, double r, double alpha)
static double	mph (int i, double T, double w0, double r)
static void	set_tf1s (Coeffs *coeffs, double b1, double b0, double a0, double w1, double sr, double alpha)
static void	set_filter (AVFilterContext *ctx, int order, double sr, double f0, double bw, double alpha)
static int	get_coeffs (AVFilterContext *ctx)
static int	config_input (AVFilterLink *inlink)
static int	filter_frame (AVFilterLink *inlink, AVFrame *in)
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)
	AVFILTER_DEFINE_CLASS (atilt)

Variables
static const AVOption	atilt_options []
static const AVFilterPad	inputs []
const AVFilter	ff_af_atilt

Macro Definition Documentation

MAX_ORDER

#define MAX_ORDER   30

Definition at line 26 of file af_atilt.c.

FILTER

#define FILTER	(		name,
			type
	)

Definition at line 120 of file af_atilt.c.

OFFSET

#define OFFSET

(

x

)

offsetof(ATiltContext, x)

Definition at line 226 of file af_atilt.c.

FLAGS

#define FLAGS   AV_OPT_FLAG_AUDIO_PARAM|AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_RUNTIME_PARAM

Definition at line 227 of file af_atilt.c.

Function Documentation

prewarp()

static double prewarp ( double  w, double  T, double  wp  )

static

Definition at line 50 of file af_atilt.c.

Referenced by mph(), and mzh().

mz()

static double mz ( int  i, double  w0, double  r, double  alpha  )

static

Definition at line 55 of file af_atilt.c.

Referenced by mzh().

mp()

static double mp ( int  i, double  w0, double  r  )

static

Definition at line 60 of file af_atilt.c.

Referenced by code_matrix_coeffs(), compare_decoding_params(), compare_matrix_params(), compute_metric(), config_input(), estimate_coeff(), lossless_matrix_coeffs(), mlp_parse(), mp_decode_end(), mp_decode_frame(), mp_decode_frame_helper(), mp_decode_init(), mp_decode_line(), mp_get_code(), mp_get_vlc(), mp_get_yuv_from_rgb(), mp_gradient(), mp_read_changes_map(), mp_read_codes_table(), mp_set_rgb_from_yuv(), mph(), rematrix_channels(), write_block_data(), and write_matrix_params().

mzh()

static double mzh ( int  i, double  T, double  w0, double  r, double  alpha  )

static

Definition at line 65 of file af_atilt.c.

Referenced by set_filter().

mph()

static double mph ( int  i, double  T, double  w0, double  r  )

static

Definition at line 70 of file af_atilt.c.

Referenced by set_filter().

set_tf1s()

static void set_tf1s ( Coeffs *  coeffs, double  b1, double  b0, double  a0, double  w1, double  sr, double  alpha  )

static

Definition at line 75 of file af_atilt.c.

Referenced by set_filter().

set_filter()

static void set_filter ( AVFilterContext *  ctx, int  order, double  sr, double  f0, double  bw, double  alpha  )

static

Definition at line 87 of file af_atilt.c.

Referenced by get_coeffs().

get_coeffs()

static int get_coeffs ( AVFilterContext *  ctx )

static

Definition at line 106 of file af_atilt.c.

Referenced by config_input(), and process_command().

config_input()

static int config_input ( AVFilterLink *  inlink )

static

Definition at line 162 of file af_atilt.c.

filter_frame()

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

static

Definition at line 179 of file af_atilt.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 207 of file af_atilt.c.

uninit()

static av_cold void uninit ( AVFilterContext *  ctx )

static

Definition at line 219 of file af_atilt.c.

AVFILTER_DEFINE_CLASS()

AVFILTER_DEFINE_CLASS

(

atilt

)

Variable Documentation

atilt_options

const AVOption atilt_options[]

static

Initial value:

= {
    { "freq",   "set central frequency",OFFSET(freq),   AV_OPT_TYPE_DOUBLE, {.dbl=10000},    20, 192000, FLAGS },
    { "slope",  "set filter slope",     OFFSET(slope),  AV_OPT_TYPE_DOUBLE, {.dbl=0},        -1,      1, FLAGS },
    { "width",  "set filter width",     OFFSET(width),  AV_OPT_TYPE_DOUBLE, {.dbl=1000},    100,  10000, FLAGS },
    { "order",  "set filter order",     OFFSET(order),  AV_OPT_TYPE_INT,    {.i64=5},       2,MAX_ORDER, FLAGS },
    { "level",  "set input level",      OFFSET(level),  AV_OPT_TYPE_DOUBLE, {.dbl=1.},        0.,    4., FLAGS },
    { NULL }
}

Definition at line 229 of file af_atilt.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 240 of file af_atilt.c.

ff_af_atilt

const AVFilter ff_af_atilt

Initial value:

= {
    .name            = "atilt",
    .description     = NULL_IF_CONFIG_SMALL("Apply spectral tilt to audio."),
    .priv_size       = sizeof(ATiltContext),
    .priv_class      = &atilt_class,
    .uninit          = uninit,
    FILTER_INPUTS(inputs),
    FILTER_OUTPUTS(ff_audio_default_filterpad),
    FILTER_SAMPLEFMTS(AV_SAMPLE_FMT_FLTP, AV_SAMPLE_FMT_DBLP),
    .process_command = process_command,
    .flags           = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC |
                       AVFILTER_FLAG_SLICE_THREADS,
}

Definition at line 249 of file af_atilt.c.