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af_afir.c File Reference

An arbitrary audio FIR filter. More...

#include <float.h>
#include "libavutil/common.h"
#include "libavutil/float_dsp.h"
#include "libavutil/intreadwrite.h"
#include "libavutil/opt.h"
#include "libavutil/xga_font_data.h"
#include "libavcodec/avfft.h"
#include "audio.h"
#include "avfilter.h"
#include "filters.h"
#include "formats.h"
#include "internal.h"
#include "af_afir.h"

Go to the source code of this file.

Macros

#define AF   AV_OPT_FLAG_AUDIO_PARAM|AV_OPT_FLAG_FILTERING_PARAM
 
#define VF   AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM
 
#define OFFSET(x)   offsetof(AudioFIRContext, x)
 

Functions

static void fcmul_add_c (float *sum, const float *t, const float *c, ptrdiff_t len)
 
static int fir_channel (AVFilterContext *ctx, void *arg, int ch, int nb_jobs)
 
static int fir_frame (AudioFIRContext *s, AVFrame *in, AVFilterLink *outlink)
 
static void drawtext (AVFrame *pic, int x, int y, const char *txt, uint32_t color)
 
static void draw_line (AVFrame *out, int x0, int y0, int x1, int y1, uint32_t color)
 
static void draw_response (AVFilterContext *ctx, AVFrame *out)
 
static int convert_coeffs (AVFilterContext *ctx)
 
static int check_ir (AVFilterLink *link, AVFrame *frame)
 
static int activate (AVFilterContext *ctx)
 
static int query_formats (AVFilterContext *ctx)
 
static int config_output (AVFilterLink *outlink)
 
static av_cold void uninit (AVFilterContext *ctx)
 
static int config_video (AVFilterLink *outlink)
 
static av_cold int init (AVFilterContext *ctx)
 
 AVFILTER_DEFINE_CLASS (afir)
 

Variables

static const AVFilterPad afir_inputs []
 
static const AVOption afir_options []
 
AVFilter ff_af_afir
 

Detailed Description

An arbitrary audio FIR filter.

Definition in file af_afir.c.

Macro Definition Documentation

#define AF   AV_OPT_FLAG_AUDIO_PARAM|AV_OPT_FLAG_FILTERING_PARAM

Definition at line 756 of file af_afir.c.

#define VF   AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM

Definition at line 757 of file af_afir.c.

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

Definition at line 758 of file af_afir.c.

Function Documentation

static void fcmul_add_c ( float *  sum,
const float *  t,
const float *  c,
ptrdiff_t  len 
)
static

Definition at line 42 of file af_afir.c.

Referenced by init().

static int fir_channel ( AVFilterContext *  ctx,
void *  arg,
int  ch,
int  nb_jobs 
)
static

Definition at line 59 of file af_afir.c.

Referenced by fir_frame().

static int fir_frame ( AudioFIRContext *  s,
AVFrame *  in,
AVFilterLink *  outlink 
)
static

Definition at line 119 of file af_afir.c.

Referenced by activate().

static void drawtext ( AVFrame *  pic,
int  x,
int  y,
const char *  txt,
uint32_t  color 
)
static

Definition at line 162 of file af_afir.c.

Referenced by draw_response().

static void draw_line ( AVFrame *  out,
int  x0,
int  y0,
int  x1,
int  y1,
uint32_t  color 
)
static

Definition at line 185 of file af_afir.c.

Referenced by draw_response().

static void draw_response ( AVFilterContext *  ctx,
AVFrame *  out 
)
static

Definition at line 211 of file af_afir.c.

Referenced by convert_coeffs().

static int convert_coeffs ( AVFilterContext *  ctx)
static

Definition at line 300 of file af_afir.c.

Referenced by activate().

static int check_ir ( AVFilterLink *  link,
AVFrame *  frame 
)
static

Definition at line 446 of file af_afir.c.

Referenced by activate().

static int activate ( AVFilterContext *  ctx)
static

Definition at line 462 of file af_afir.c.

static int query_formats ( AVFilterContext *  ctx)
static

Definition at line 546 of file af_afir.c.

static int config_output ( AVFilterLink *  outlink)
static

Definition at line 599 of file af_afir.c.

Referenced by init().

static av_cold void uninit ( AVFilterContext *  ctx)
static

Definition at line 627 of file af_afir.c.

static int config_video ( AVFilterLink *  outlink)
static

Definition at line 677 of file af_afir.c.

Referenced by init().

static av_cold int init ( AVFilterContext *  ctx)
static

Definition at line 694 of file af_afir.c.

AVFILTER_DEFINE_CLASS ( afir  )

Variable Documentation

const AVFilterPad afir_inputs[]
static
Initial value:
= {
{
.name = "main",
.type = AVMEDIA_TYPE_AUDIO,
},{
.name = "ir",
.type = AVMEDIA_TYPE_AUDIO,
},
{ NULL }
}
NULL
#define NULL
Definition: coverity.c:32
AVMEDIA_TYPE_AUDIO
Definition: avutil.h:202

Definition at line 745 of file af_afir.c.

const AVOption afir_options[]
static
Initial value:
= {
{ "dry", "set dry gain", OFFSET(dry_gain), AV_OPT_TYPE_FLOAT, {.dbl=1}, 0, 10, AF },
{ "wet", "set wet gain", OFFSET(wet_gain), AV_OPT_TYPE_FLOAT, {.dbl=1}, 0, 10, AF },
{ "length", "set IR length", OFFSET(length), AV_OPT_TYPE_FLOAT, {.dbl=1}, 0, 1, AF },
{ "gtype", "set IR auto gain type",OFFSET(gtype), AV_OPT_TYPE_INT, {.i64=0}, -1, 2, AF, "gtype" },
{ "none", "without auto gain", 0, AV_OPT_TYPE_CONST, {.i64=-1}, 0, 0, AF, "gtype" },
{ "peak", "peak gain", 0, AV_OPT_TYPE_CONST, {.i64=0}, 0, 0, AF, "gtype" },
{ "dc", "DC gain", 0, AV_OPT_TYPE_CONST, {.i64=1}, 0, 0, AF, "gtype" },
{ "gn", "gain to noise", 0, AV_OPT_TYPE_CONST, {.i64=2}, 0, 0, AF, "gtype" },
{ "irgain", "set IR gain", OFFSET(ir_gain), AV_OPT_TYPE_FLOAT, {.dbl=1}, 0, 1, AF },
{ "irfmt", "set IR format", OFFSET(ir_format), AV_OPT_TYPE_INT, {.i64=1}, 0, 1, AF, "irfmt" },
{ "mono", "single channel", 0, AV_OPT_TYPE_CONST, {.i64=0}, 0, 0, AF, "irfmt" },
{ "input", "same as input", 0, AV_OPT_TYPE_CONST, {.i64=1}, 0, 0, AF, "irfmt" },
{ "maxir", "set max IR length", OFFSET(max_ir_len), AV_OPT_TYPE_FLOAT, {.dbl=30}, 0.1, 60, AF },
{ "response", "show IR frequency response", OFFSET(response), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, VF },
{ "channel", "set IR channel to display frequency response", OFFSET(ir_channel), AV_OPT_TYPE_INT, {.i64=0}, 0, 1024, VF },
{ "size", "set video size", OFFSET(w), AV_OPT_TYPE_IMAGE_SIZE, {.str = "hd720"}, 0, 0, VF },
{ NULL }
}
NULL
#define NULL
Definition: coverity.c:32
AV_OPT_TYPE_INT
Definition: opt.h:223
AV_OPT_TYPE_CONST
Definition: opt.h:232
AV_OPT_TYPE_FLOAT
Definition: opt.h:226
length
GLsizei GLsizei * length
Definition: opengl_enc.c:115
AF
#define AF
Definition: af_afir.c:756
w
uint8_t w
Definition: llviddspenc.c:38
AV_OPT_TYPE_BOOL
Definition: opt.h:240
VF
#define VF
Definition: af_afir.c:757
AV_OPT_TYPE_IMAGE_SIZE
offset must point to two consecutive integers
Definition: opt.h:233
OFFSET
#define OFFSET(x)
Definition: af_afir.c:758

Definition at line 760 of file af_afir.c.

AVFilter ff_af_afir
Initial value:
= {
.name = "afir",
.description = NULL_IF_CONFIG_SMALL("Apply Finite Impulse Response filter with supplied coefficients in 2nd stream."),
.priv_size = sizeof(AudioFIRContext),
.priv_class = &afir_class,
.query_formats = query_formats,
.init = init,
.activate = activate,
.uninit = uninit,
.inputs = afir_inputs,
.flags = AVFILTER_FLAG_DYNAMIC_OUTPUTS |
AVFILTER_FLAG_SLICE_THREADS,
}
init
static av_cold int init(AVFilterContext *ctx)
Definition: af_afir.c:694
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:111
query_formats
static int query_formats(AVFilterContext *ctx)
Definition: af_afir.c:546
activate
static int activate(AVFilterContext *ctx)
Definition: af_afir.c:462
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:186
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:116
inputs
static const AVFilterPad inputs[]
Definition: af_acontrast.c:193
uninit
static av_cold void uninit(AVFilterContext *ctx)
Definition: af_afir.c:627
flags
#define flags(name, subs,...)
Definition: cbs_av1.c:596
afir_inputs
static const AVFilterPad afir_inputs[]
Definition: af_afir.c:745

Definition at line 782 of file af_afir.c.

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