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 {
  DC_TYPE, AC_TYPE, SQ_TYPE, PS_TYPE,
  NB_TYPES, 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_channels (AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
 
static int filter_frame (AVFilterLink *inlink, AVFrame *buf)
 

Variables

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

Macro Definition Documentation

◆ FILTER_ORDER

#define FILTER_ORDER   4

Definition at line 31 of file af_anequalizer.c.

◆ OFFSET

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

Definition at line 75 of file af_anequalizer.c.

◆ A

#define A   AV_OPT_FLAG_AUDIO_PARAM

Definition at line 76 of file af_anequalizer.c.

◆ V

#define V   AV_OPT_FLAG_VIDEO_PARAM

Definition at line 77 of file af_anequalizer.c.

◆ F

Definition at line 78 of file af_anequalizer.c.

Enumeration Type Documentation

◆ FilterType

enum FilterType
Enumerator
DC_TYPE 
AC_TYPE 
SQ_TYPE 
PS_TYPE 
NB_TYPES 
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()

AVFILTER_DEFINE_CLASS ( anequalizer  )

◆ draw_curves()

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().

◆ config_video()

static int config_video ( AVFilterLink outlink)
static

Definition at line 167 of file af_anequalizer.c.

Referenced by init().

◆ init()

static av_cold int init ( AVFilterContext ctx)
static

Definition at line 188 of file af_anequalizer.c.

◆ query_formats()

static int query_formats ( AVFilterContext ctx)
static

Definition at line 217 of file af_anequalizer.c.

◆ uninit()

static av_cold void uninit ( AVFilterContext ctx)
static

Definition at line 256 of file af_anequalizer.c.

◆ butterworth_fo_section()

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

Definition at line 266 of file af_anequalizer.c.

Referenced by butterworth_bp_filter().

◆ 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 297 of file af_anequalizer.c.

Referenced by equalizer().

◆ chebyshev1_fo_section()

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 334 of file af_anequalizer.c.

Referenced by chebyshev1_bp_filter().

◆ 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 366 of file af_anequalizer.c.

Referenced by equalizer().

◆ chebyshev2_fo_section()

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 407 of file af_anequalizer.c.

Referenced by chebyshev2_bp_filter().

◆ 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 439 of file af_anequalizer.c.

Referenced by equalizer().

◆ butterworth_compute_bw_gain_db()

static double butterworth_compute_bw_gain_db ( double  gain)
static

Definition at line 480 of file af_anequalizer.c.

Referenced by equalizer().

◆ chebyshev1_compute_bw_gain_db()

static double chebyshev1_compute_bw_gain_db ( double  gain)
static

Definition at line 494 of file af_anequalizer.c.

Referenced by equalizer().

◆ chebyshev2_compute_bw_gain_db()

static double chebyshev2_compute_bw_gain_db ( double  gain)
static

Definition at line 508 of file af_anequalizer.c.

Referenced by equalizer().

◆ hz_2_rad()

static double hz_2_rad ( double  x,
double  fs 
)
inlinestatic

Definition at line 522 of file af_anequalizer.c.

Referenced by equalizer().

◆ equalizer()

static void equalizer ( EqualizatorFilter f,
double  sample_rate 
)
static

Definition at line 527 of file af_anequalizer.c.

Referenced by add_filter(), and process_command().

◆ add_filter()

static int add_filter ( AudioNEqualizerContext s,
AVFilterLink inlink 
)
static

Definition at line 550 of file af_anequalizer.c.

Referenced by config_input().

◆ config_input()

static int config_input ( AVFilterLink inlink)
static

Definition at line 569 of file af_anequalizer.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 627 of file af_anequalizer.c.

◆ section_process()

static double section_process ( FoSection S,
double  in 
)
inlinestatic

Definition at line 660 of file af_anequalizer.c.

Referenced by process_sample().

◆ process_sample()

static double process_sample ( FoSection s1,
double  in 
)
static

Definition at line 683 of file af_anequalizer.c.

Referenced by filter_channels().

◆ filter_channels()

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

Definition at line 696 of file af_anequalizer.c.

Referenced by filter_frame().

◆ filter_frame()

static int filter_frame ( AVFilterLink inlink,
AVFrame buf 
)
static

Definition at line 726 of file af_anequalizer.c.

Variable Documentation

◆ anequalizer_options

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 }
}

Definition at line 80 of file af_anequalizer.c.

◆ inputs

const AVFilterPad inputs[]
static
Initial value:
= {
{
.name = "default",
.config_props = config_input,
.filter_frame = filter_frame,
.needs_writable = 1,
},
{ NULL }
}

Definition at line 756 of file af_anequalizer.c.

◆ ff_af_anequalizer

const 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,
}

Definition at line 767 of file af_anequalizer.c.

F
#define F
Definition: af_anequalizer.c:78
w
uint8_t w
Definition: llviddspenc.c:39
filter_frame
static int filter_frame(AVFilterLink *inlink, AVFrame *buf)
Definition: af_anequalizer.c:726
config_input
static int config_input(AVFilterLink *inlink)
Definition: af_anequalizer.c:569
AV_OPT_TYPE_DOUBLE
@ AV_OPT_TYPE_DOUBLE
Definition: opt.h:227
AVMEDIA_TYPE_AUDIO
@ AVMEDIA_TYPE_AUDIO
Definition: avutil.h:202
query_formats
static int query_formats(AVFilterContext *ctx)
Definition: af_anequalizer.c:217
outputs
static const AVFilterPad outputs[]
Definition: af_acontrast.c:203
A
#define A
Definition: af_anequalizer.c:76
uninit
static av_cold void uninit(AVFilterContext *ctx)
Definition: af_anequalizer.c:256
AudioNEqualizerContext
Definition: af_anequalizer.c:60
NULL
#define NULL
Definition: coverity.c:32
inputs
static const AVFilterPad inputs[]
Definition: af_anequalizer.c:756
AV_OPT_TYPE_IMAGE_SIZE
@ AV_OPT_TYPE_IMAGE_SIZE
offset must point to two consecutive integers
Definition: opt.h:235
process_command
static int process_command(AVFilterContext *ctx, const char *cmd, const char *args, char *res, int res_len, int flags)
Definition: af_anequalizer.c:627
AVFILTER_FLAG_DYNAMIC_OUTPUTS
#define AVFILTER_FLAG_DYNAMIC_OUTPUTS
The number of the filter outputs is not determined just by AVFilter.outputs.
Definition: avfilter.h:112
draw_curves
static void draw_curves(AVFilterContext *ctx, AVFilterLink *inlink, AVFrame *out)
Definition: af_anequalizer.c:94
NULL_IF_CONFIG_SMALL
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification.
Definition: internal.h:117
V
#define V
Definition: af_anequalizer.c:77
OFFSET
#define OFFSET(x)
Definition: af_anequalizer.c:75
AV_OPT_TYPE_INT
@ AV_OPT_TYPE_INT
Definition: opt.h:225
AVFILTER_FLAG_SLICE_THREADS
#define AVFILTER_FLAG_SLICE_THREADS
The filter supports multithreading by splitting frames into multiple parts and processing them concur...
Definition: avfilter.h:117
AV_OPT_TYPE_BOOL
@ AV_OPT_TYPE_BOOL
Definition: opt.h:242
AVFILTER_FLAG_SUPPORT_TIMELINE_INTERNAL
#define AVFILTER_FLAG_SUPPORT_TIMELINE_INTERNAL
Same as AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC, except that the filter will have its filter_frame() c...
Definition: avfilter.h:134
flags
#define flags(name, subs,...)
Definition: cbs_av1.c:561
AV_OPT_TYPE_STRING
@ AV_OPT_TYPE_STRING
Definition: opt.h:229
init
static av_cold int init(AVFilterContext *ctx)
Definition: af_anequalizer.c:188
AV_OPT_TYPE_CONST
@ AV_OPT_TYPE_CONST
Definition: opt.h:234