FFmpeg
Data Structures | Macros | Enumerations | Functions | Variables
af_anequalizer.c File Reference
#include "libavutil/intreadwrite.h"
#include "libavutil/avstring.h"
#include "libavutil/ffmath.h"
#include "libavutil/opt.h"
#include "libavutil/parseutils.h"
#include "avfilter.h"
#include "internal.h"
#include "audio.h"

Go to the source code of this file.

Data Structures

struct  FoSection
 
struct  EqualizatorFilter
 
struct  AudioNEqualizerContext
 

Macros

#define FILTER_ORDER   4
 
#define OFFSET(x)   offsetof(AudioNEqualizerContext, x)
 
#define A   AV_OPT_FLAG_AUDIO_PARAM
 
#define V   AV_OPT_FLAG_VIDEO_PARAM
 
#define F   AV_OPT_FLAG_FILTERING_PARAM
 

Enumerations

enum  FilterType {
  BUTTERWORTH, CHEBYSHEV1, CHEBYSHEV2, NB_TYPES,
  biquad, equalizer, bass, treble,
  bandpass, bandreject, allpass, highpass,
  lowpass, lowshelf, highshelf, WEAK,
  STRONG, NB_FILTER, LOWPASS, FLAT,
  AFLAT, CHROMA, COLOR, ACOLOR,
  XFLAT, YFLAT, NB_FILTERS
}
 

Functions

 AVFILTER_DEFINE_CLASS (anequalizer)
 
static void draw_curves (AVFilterContext *ctx, AVFilterLink *inlink, AVFrame *out)
 
static int config_video (AVFilterLink *outlink)
 
static av_cold int init (AVFilterContext *ctx)
 
static int query_formats (AVFilterContext *ctx)
 
static av_cold void uninit (AVFilterContext *ctx)
 
static void butterworth_fo_section (FoSection *S, double beta, double si, double g, double g0, double D, double c0)
 
static void butterworth_bp_filter (EqualizatorFilter *f, int N, double w0, double wb, double G, double Gb, double G0)
 
static void chebyshev1_fo_section (FoSection *S, double a, double c, double tetta_b, double g0, double si, double b, double D, double c0)
 
static void chebyshev1_bp_filter (EqualizatorFilter *f, int N, double w0, double wb, double G, double Gb, double G0)
 
static void chebyshev2_fo_section (FoSection *S, double a, double c, double tetta_b, double g, double si, double b, double D, double c0)
 
static void chebyshev2_bp_filter (EqualizatorFilter *f, int N, double w0, double wb, double G, double Gb, double G0)
 
static double butterworth_compute_bw_gain_db (double gain)
 
static double chebyshev1_compute_bw_gain_db (double gain)
 
static double chebyshev2_compute_bw_gain_db (double gain)
 
static double hz_2_rad (double x, double fs)
 
static void equalizer (EqualizatorFilter *f, double sample_rate)
 
static int add_filter (AudioNEqualizerContext *s, AVFilterLink *inlink)
 
static int config_input (AVFilterLink *inlink)
 
static int process_command (AVFilterContext *ctx, const char *cmd, const char *args, char *res, int res_len, int flags)
 
static double section_process (FoSection *S, double in)
 
static double process_sample (FoSection *s1, double in)
 
static int filter_frame (AVFilterLink *inlink, AVFrame *buf)
 

Variables

static const AVOption anequalizer_options []
 
static const AVFilterPad inputs []
 
AVFilter ff_af_anequalizer
 

Macro Definition Documentation

#define FILTER_ORDER   4

Definition at line 31 of file af_anequalizer.c.

Referenced by draw_curves(), equalizer(), and process_sample().

#define OFFSET (   x)    offsetof(AudioNEqualizerContext, x)

Definition at line 75 of file af_anequalizer.c.

#define A   AV_OPT_FLAG_AUDIO_PARAM

Definition at line 76 of file af_anequalizer.c.

#define V   AV_OPT_FLAG_VIDEO_PARAM

Definition at line 77 of file af_anequalizer.c.

Definition at line 78 of file af_anequalizer.c.

Enumeration Type Documentation

enum FilterType
Enumerator
BUTTERWORTH 
CHEBYSHEV1 
CHEBYSHEV2 
NB_TYPES 
biquad 
equalizer 
bass 
treble 
bandpass 
bandreject 
allpass 
highpass 
lowpass 
lowshelf 
highshelf 
WEAK 
STRONG 
NB_FILTER 
LOWPASS 
FLAT 
AFLAT 
CHROMA 
COLOR 
ACOLOR 
XFLAT 
YFLAT 
NB_FILTERS 

Definition at line 33 of file af_anequalizer.c.

Function Documentation

AVFILTER_DEFINE_CLASS ( anequalizer  )
static void draw_curves ( AVFilterContext ctx,
AVFilterLink inlink,
AVFrame out 
)
static

Definition at line 94 of file af_anequalizer.c.

Referenced by config_video(), and process_command().

static int config_video ( AVFilterLink outlink)
static

Definition at line 167 of file af_anequalizer.c.

Referenced by init().

static av_cold int init ( AVFilterContext ctx)
static

Definition at line 188 of file af_anequalizer.c.

static int query_formats ( AVFilterContext ctx)
static

Definition at line 231 of file af_anequalizer.c.

static av_cold void uninit ( AVFilterContext ctx)
static

Definition at line 270 of file af_anequalizer.c.

static void butterworth_fo_section ( FoSection S,
double  beta,
double  si,
double  g,
double  g0,
double  D,
double  c0 
)
static

Definition at line 282 of file af_anequalizer.c.

Referenced by butterworth_bp_filter().

static void butterworth_bp_filter ( EqualizatorFilter f,
int  N,
double  w0,
double  wb,
double  G,
double  Gb,
double  G0 
)
static

Definition at line 313 of file af_anequalizer.c.

Referenced by equalizer().

static void chebyshev1_fo_section ( FoSection S,
double  a,
double  c,
double  tetta_b,
double  g0,
double  si,
double  b,
double  D,
double  c0 
)
static

Definition at line 350 of file af_anequalizer.c.

Referenced by chebyshev1_bp_filter().

static void chebyshev1_bp_filter ( EqualizatorFilter f,
int  N,
double  w0,
double  wb,
double  G,
double  Gb,
double  G0 
)
static

Definition at line 382 of file af_anequalizer.c.

Referenced by equalizer().

static void chebyshev2_fo_section ( FoSection S,
double  a,
double  c,
double  tetta_b,
double  g,
double  si,
double  b,
double  D,
double  c0 
)
static

Definition at line 423 of file af_anequalizer.c.

Referenced by chebyshev2_bp_filter().

static void chebyshev2_bp_filter ( EqualizatorFilter f,
int  N,
double  w0,
double  wb,
double  G,
double  Gb,
double  G0 
)
static

Definition at line 455 of file af_anequalizer.c.

Referenced by equalizer().

static double butterworth_compute_bw_gain_db ( double  gain)
static

Definition at line 496 of file af_anequalizer.c.

Referenced by equalizer().

static double chebyshev1_compute_bw_gain_db ( double  gain)
static

Definition at line 510 of file af_anequalizer.c.

Referenced by equalizer().

static double chebyshev2_compute_bw_gain_db ( double  gain)
static

Definition at line 524 of file af_anequalizer.c.

Referenced by equalizer().

static double hz_2_rad ( double  x,
double  fs 
)
inlinestatic

Definition at line 538 of file af_anequalizer.c.

Referenced by equalizer().

static void equalizer ( EqualizatorFilter f,
double  sample_rate 
)
static

Definition at line 543 of file af_anequalizer.c.

Referenced by add_filter(), and process_command().

static int add_filter ( AudioNEqualizerContext s,
AVFilterLink inlink 
)
static

Definition at line 566 of file af_anequalizer.c.

Referenced by config_input().

static int config_input ( AVFilterLink inlink)
static

Definition at line 585 of file af_anequalizer.c.

static int process_command ( AVFilterContext ctx,
const char *  cmd,
const char *  args,
char *  res,
int  res_len,
int  flags 
)
static

Definition at line 643 of file af_anequalizer.c.

static double section_process ( FoSection S,
double  in 
)
inlinestatic

Definition at line 676 of file af_anequalizer.c.

Referenced by process_sample().

static double process_sample ( FoSection s1,
double  in 
)
static

Definition at line 699 of file af_anequalizer.c.

Referenced by filter_frame().

static int filter_frame ( AVFilterLink inlink,
AVFrame buf 
)
static

Definition at line 712 of file af_anequalizer.c.

Variable Documentation

const AVOption anequalizer_options[]
static
Initial value:
= {
{ "params", NULL, OFFSET(args), AV_OPT_TYPE_STRING, {.str=""}, 0, 0, A|F },
{ "curves", "draw frequency response curves", OFFSET(draw_curves), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, V|F },
{ "size", "set video size", OFFSET(w), AV_OPT_TYPE_IMAGE_SIZE, {.str = "hd720"}, 0, 0, V|F },
{ "mgain", "set max gain", OFFSET(mag), AV_OPT_TYPE_DOUBLE, {.dbl=60}, -900, 900, V|F },
{ "fscale", "set frequency scale", OFFSET(fscale), AV_OPT_TYPE_INT, {.i64=1}, 0, 1, V|F, "fscale" },
{ "lin", "linear", 0, AV_OPT_TYPE_CONST, {.i64=0}, 0, 0, V|F, "fscale" },
{ "log", "logarithmic", 0, AV_OPT_TYPE_CONST, {.i64=1}, 0, 0, V|F, "fscale" },
{ "colors", "set channels curves colors", OFFSET(colors), AV_OPT_TYPE_STRING, {.str = "red|green|blue|yellow|orange|lime|pink|magenta|brown" }, 0, 0, V|F },
{ NULL }
}
#define NULL
Definition: coverity.c:32
#define A
#define F
#define V
static void draw_curves(AVFilterContext *ctx, AVFilterLink *inlink, AVFrame *out)
uint8_t w
Definition: llviddspenc.c:38
offset must point to two consecutive integers
Definition: opt.h:233
#define OFFSET(x)

Definition at line 80 of file af_anequalizer.c.

const AVFilterPad inputs[]
static
Initial value:
= {
{
.name = "default",
.config_props = config_input,
.filter_frame = filter_frame,
.needs_writable = 1,
},
{ NULL }
}
#define NULL
Definition: coverity.c:32
static int filter_frame(AVFilterLink *inlink, AVFrame *buf)
static int config_input(AVFilterLink *inlink)

Definition at line 750 of file af_anequalizer.c.

AVFilter ff_af_anequalizer
Initial value:
= {
.name = "anequalizer",
.description = NULL_IF_CONFIG_SMALL("Apply high-order audio parametric multi band equalizer."),
.priv_size = sizeof(AudioNEqualizerContext),
.priv_class = &anequalizer_class,
.init = init,
}
#define NULL
Definition: coverity.c:32
static av_cold void uninit(AVFilterContext *ctx)
#define AVFILTER_FLAG_DYNAMIC_OUTPUTS
The number of the filter outputs is not determined just by AVFilter.outputs.
Definition: avfilter.h:111
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:186
static int query_formats(AVFilterContext *ctx)
static const AVFilterPad inputs[]
static const AVFilterPad outputs[]
Definition: af_acontrast.c:203
static int process_command(AVFilterContext *ctx, const char *cmd, const char *args, char *res, int res_len, int flags)
#define flags(name, subs,...)
Definition: cbs_av1.c:561
static av_cold int init(AVFilterContext *ctx)

Definition at line 761 of file af_anequalizer.c.