FFmpeg
Data Structures | Macros | Enumerations | Functions | Variables
af_biquads.c File Reference
#include "libavutil/avassert.h"
#include "libavutil/ffmath.h"
#include "libavutil/opt.h"
#include "audio.h"
#include "avfilter.h"
#include "internal.h"

Go to the source code of this file.

Data Structures

struct  ChanCache
 
struct  BiquadsContext
 
struct  ThreadData
 Used for passing data between threads. More...
 

Macros

#define BIQUAD_FILTER(name, type, min, max, need_clipping)
 
#define BIQUAD_DII_FILTER(name, type, min, max, need_clipping)
 
#define BIQUAD_TDII_FILTER(name, type, min, max, need_clipping)
 
#define BIQUAD_LATT_FILTER(name, type, min, max, need_clipping)
 
#define OFFSET(x)   offsetof(BiquadsContext, x)
 
#define FLAGS   AV_OPT_FLAG_AUDIO_PARAM|AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_RUNTIME_PARAM
 
#define AF   AV_OPT_FLAG_AUDIO_PARAM|AV_OPT_FLAG_FILTERING_PARAM
 
#define DEFINE_BIQUAD_FILTER(name_, description_)
 

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
}
 
enum  WidthType {
  NONE, HERTZ, OCTAVE, QFACTOR,
  SLOPE, KHERTZ, NB_WTYPE
}
 
enum  TransformType {
  PREDICTOR_TRANSFORM = 0, COLOR_TRANSFORM = 1, SUBTRACT_GREEN = 2, COLOR_INDEXING_TRANSFORM = 3,
  DI, DII, TDII, LATT,
  NB_TTYPE
}
 

Functions

static int query_formats (AVFilterContext *ctx)
 
static void convert_dir2latt (BiquadsContext *s)
 
static int config_filter (AVFilterLink *outlink, int reset)
 
static int config_output (AVFilterLink *outlink)
 
static int filter_channel (AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
 
static int filter_frame (AVFilterLink *inlink, AVFrame *buf)
 
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)
 

Variables

static const AVFilterPad inputs []
 
static const AVFilterPad outputs []
 

Macro Definition Documentation

#define BIQUAD_FILTER (   name,
  type,
  min,
  max,
  need_clipping 
)

Definition at line 203 of file af_biquads.c.

#define BIQUAD_DII_FILTER (   name,
  type,
  min,
  max,
  need_clipping 
)

Definition at line 286 of file af_biquads.c.

#define BIQUAD_TDII_FILTER (   name,
  type,
  min,
  max,
  need_clipping 
)

Definition at line 334 of file af_biquads.c.

#define BIQUAD_LATT_FILTER (   name,
  type,
  min,
  max,
  need_clipping 
)

Definition at line 381 of file af_biquads.c.

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

Definition at line 867 of file af_biquads.c.

#define FLAGS   AV_OPT_FLAG_AUDIO_PARAM|AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_RUNTIME_PARAM

Definition at line 868 of file af_biquads.c.

#define AF   AV_OPT_FLAG_AUDIO_PARAM|AV_OPT_FLAG_FILTERING_PARAM

Definition at line 869 of file af_biquads.c.

#define DEFINE_BIQUAD_FILTER (   name_,
  description_ 
)
Value:
AVFILTER_DEFINE_CLASS(name_); \
static av_cold int name_##_init(AVFilterContext *ctx) \
{ \
BiquadsContext *s = ctx->priv; \
s->filter_type = name_; \
return 0; \
} \
\
AVFilter ff_af_##name_ = { \
.name = #name_, \
.description = NULL_IF_CONFIG_SMALL(description_), \
.priv_size = sizeof(BiquadsContext), \
.init = name_##_init, \
.uninit = uninit, \
.query_formats = query_formats, \
.inputs = inputs, \
.outputs = outputs, \
.priv_class = &name_##_class, \
.process_command = process_command, \
.flags = AVFILTER_FLAG_SLICE_THREADS | AVFILTER_FLAG_SUPPORT_TIMELINE_INTERNAL, \
}
init
static av_cold int init(AVCodecContext *avctx)
Definition: avrndec.c:35
inputs
static const AVFilterPad inputs[]
Definition: af_biquads.c:849
av_cold
#define av_cold
Definition: attributes.h:88
outputs
static const AVFilterPad outputs[]
Definition: af_biquads.c:858
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:115
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
ctx
AVFormatContext * ctx
Definition: movenc.c:48
s
#define s(width, name)
Definition: cbs_vp9.c:257
query_formats
static int query_formats(AVFilterContext *ctx)
Definition: af_biquads.c:145
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
uninit
static av_cold void uninit(AVFilterContext *ctx)
Definition: af_biquads.c:842
AVFILTER_DEFINE_CLASS
#define AVFILTER_DEFINE_CLASS(fname)
Definition: internal.h:288
AVFilterContext
An instance of a filter.
Definition: avfilter.h:341
return
these buffered frames must be flushed immediately if a new input produces new the filter must not call request_frame to get more It must just process the frame or queue it The task of requesting more frames is left to the filter s request_frame method or the application If a filter has several the filter must be ready for frames arriving randomly on any input any filter with several inputs will most likely require some kind of queuing mechanism It is perfectly acceptable to have a limited queue and to drop frames when the inputs are too unbalanced request_frame For filters that do not use the this method is called when a frame is wanted on an output For a it should directly call filter_frame on the corresponding output For a if there are queued frames already one of these frames should be pushed If the filter should request a frame on one of its repeatedly until at least one frame has been pushed Return or at least make progress towards producing a it should return
Definition: filter_design.txt:255
process_command
static int process_command(AVFilterContext *ctx, const char *cmd, const char *args, char *res, int res_len, int flags)
Definition: af_biquads.c:829

Definition at line 871 of file af_biquads.c.

Enumeration Type Documentation

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 72 of file af_biquads.c.

enum WidthType
Enumerator
NONE 
HERTZ 
OCTAVE 
QFACTOR 
SLOPE 
KHERTZ 
NB_WTYPE 

Definition at line 86 of file af_biquads.c.

enum TransformType
Enumerator
PREDICTOR_TRANSFORM 
COLOR_TRANSFORM 
SUBTRACT_GREEN 
COLOR_INDEXING_TRANSFORM 
DI 
DII 
TDII 
LATT 
NB_TTYPE 

Definition at line 96 of file af_biquads.c.

Function Documentation

static int query_formats ( AVFilterContext *  ctx)
static

Definition at line 145 of file af_biquads.c.

static void convert_dir2latt ( BiquadsContext *  s)
static

Definition at line 436 of file af_biquads.c.

Referenced by config_filter().

static int config_filter ( AVFilterLink *  outlink,
int  reset 
)
static

Definition at line 453 of file af_biquads.c.

Referenced by config_output(), and process_command().

static int config_output ( AVFilterLink *  outlink)
static

Definition at line 753 of file af_biquads.c.

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

Definition at line 762 of file af_biquads.c.

Referenced by filter_frame().

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

Definition at line 789 of file af_biquads.c.

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

Definition at line 829 of file af_biquads.c.

static av_cold void uninit ( AVFilterContext *  ctx)
static

Definition at line 842 of file af_biquads.c.

Variable Documentation

const AVFilterPad inputs[]
static
Initial value:
= {
{
.name = "default",
.type = AVMEDIA_TYPE_AUDIO,
.filter_frame = filter_frame,
},
{ NULL }
}
NULL
#define NULL
Definition: coverity.c:32
AVMEDIA_TYPE_AUDIO
Definition: avutil.h:202
filter_frame
static int filter_frame(AVFilterLink *inlink, AVFrame *buf)
Definition: af_biquads.c:789

Definition at line 849 of file af_biquads.c.

const AVFilterPad outputs[]
static
Initial value:
= {
{
.name = "default",
.type = AVMEDIA_TYPE_AUDIO,
.config_props = config_output,
},
{ NULL }
}
NULL
#define NULL
Definition: coverity.c:32
AVMEDIA_TYPE_AUDIO
Definition: avutil.h:202
config_output
static int config_output(AVFilterLink *outlink)
Definition: af_biquads.c:753

Definition at line 858 of file af_biquads.c.

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