avf_showfreqs.c File Reference

#include <float.h>
#include <math.h>
#include "libavutil/mem.h"
#include "libavutil/tx.h"
#include "libavutil/avassert.h"
#include "libavutil/avstring.h"
#include "libavutil/channel_layout.h"
#include "libavutil/intreadwrite.h"
#include "libavutil/opt.h"
#include "libavutil/parseutils.h"
#include "audio.h"
#include "filters.h"
#include "formats.h"
#include "video.h"
#include "avfilter.h"
#include "window_func.h"

Go to the source code of this file.

Data Structures
struct	ShowFreqsContext

Macros
#define	OFFSET(x)
#define	FLAGS   AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
#define	RE(x, ch)
#define	IM(x, ch)
#define	M(a, b)
#define	P(a, b)

Enumerations
enum	DataMode { MAGNITUDE , PHASE , DELAY , NB_DATA }
enum	DisplayMode { LINE , BAR , DOT , NB_MODES }
enum	ChannelMode { COMBINED , SEPARATE , NB_CMODES }
enum	FrequencyScale { FS_LINEAR , FS_LOG , FS_RLOG , NB_FSCALES }
enum	AmplitudeScale {   AS_LINEAR , AS_SQRT , AS_CBRT , AS_LOG ,   NB_ASCALES }

Functions
	AVFILTER_DEFINE_CLASS (showfreqs)
static int	query_formats (const AVFilterContext *ctx, AVFilterFormatsConfig **cfg_in, AVFilterFormatsConfig **cfg_out)
static int	config_output (AVFilterLink *outlink)
static void	draw_dot (AVFrame *out, int x, int y, uint8_t fg[4])
static int	get_sx (ShowFreqsContext *s, int f)
static float	get_bsize (ShowFreqsContext *s, int f)
static void	plot_freq (ShowFreqsContext *s, int ch, double a, int f, uint8_t fg[4], int *prev_y, AVFrame *out, AVFilterLink *outlink)
static int	plot_freqs (AVFilterLink *inlink, int64_t pts)
static int	filter_frame (AVFilterLink *inlink, AVFrame *in)
static int	activate (AVFilterContext *ctx)
static av_cold void	uninit (AVFilterContext *ctx)

Variables
static const AVOption	showfreqs_options []
static const AVFilterPad	showfreqs_outputs []
const FFFilter	ff_avf_showfreqs

Macro Definition Documentation

OFFSET

#define OFFSET

(

x

)

Value:

offsetof(ShowFreqsContext, x)

Definition at line 79 of file avf_showfreqs.c.

FLAGS

#define FLAGS   AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM

Definition at line 80 of file avf_showfreqs.c.

RE

#define RE	(		x,
			ch )

Value:

s->fft_data[ch][x].re

Referenced by cmul(), and plot_freqs().

IM

#define IM	(		x,
			ch )

Value:

s->fft_data[ch][x].im

Referenced by cmul(), and plot_freqs().

M

#define M	(		a,
			b )

Value:

(sqrt((a) * (a) + (b) * (b)))

Referenced by plot_freqs().

P

#define P	(		a,
			b )

Value:

(atan2((b), (a)))

Referenced by plot_freqs().

Enumeration Type Documentation

DataMode

enum DataMode

Enumerator
MAGNITUDE
PHASE
DELAY
NB_DATA

Definition at line 39 of file avf_showfreqs.c.

DisplayMode

enum DisplayMode

Enumerator
LINE
BAR
DOT
NB_MODES

Definition at line 40 of file avf_showfreqs.c.

ChannelMode

enum ChannelMode

Enumerator
COMBINED
SEPARATE
NB_CMODES

Definition at line 41 of file avf_showfreqs.c.

FrequencyScale

enum FrequencyScale

Enumerator
FS_LINEAR
FS_LOG
FS_RLOG
NB_FSCALES

Definition at line 42 of file avf_showfreqs.c.

AmplitudeScale

enum AmplitudeScale

Enumerator
AS_LINEAR
AS_SQRT
AS_CBRT
AS_LOG
NB_ASCALES

Definition at line 43 of file avf_showfreqs.c.

Function Documentation

AVFILTER_DEFINE_CLASS()

AVFILTER_DEFINE_CLASS

(

showfreqs

)

query_formats()

static int query_formats ( const AVFilterContext * ctx, AVFilterFormatsConfig ** cfg_in, AVFilterFormatsConfig ** cfg_out )

static

Definition at line 119 of file avf_showfreqs.c.

config_output()

static int config_output ( AVFilterLink * outlink )

static

Definition at line 141 of file avf_showfreqs.c.

draw_dot()

static void draw_dot ( AVFrame * out, int x, int y, uint8_t fg[4] )

inlinestatic

Definition at line 246 of file avf_showfreqs.c.

Referenced by plot_freq().

get_sx()

static int get_sx ( ShowFreqsContext * s, int f )

static

Definition at line 257 of file avf_showfreqs.c.

Referenced by plot_freq().

get_bsize()

static float get_bsize ( ShowFreqsContext * s, int f )

static

Definition at line 271 of file avf_showfreqs.c.

Referenced by plot_freq().

plot_freq()

static void plot_freq ( ShowFreqsContext * s, int ch, double a, int f, uint8_t fg[4], int * prev_y, AVFrame * out, AVFilterLink * outlink )

inlinestatic

Definition at line 287 of file avf_showfreqs.c.

Referenced by plot_freqs().

plot_freqs()

static int plot_freqs ( AVFilterLink * inlink, int64_t pts )

static

Definition at line 371 of file avf_showfreqs.c.

Referenced by filter_frame().

filter_frame()

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

static

Definition at line 471 of file avf_showfreqs.c.

Referenced by activate().

activate()

static int activate ( AVFilterContext * ctx )

static

Definition at line 491 of file avf_showfreqs.c.

uninit()

static av_cold void uninit ( AVFilterContext * ctx )

static

Definition at line 521 of file avf_showfreqs.c.

Variable Documentation

showfreqs_options

const AVOption showfreqs_options[]

static

Definition at line 82 of file avf_showfreqs.c.

showfreqs_outputs

const AVFilterPad showfreqs_outputs[]

static

Initial value:

= {
    {
        .name          = "default",
        .type          = AVMEDIA_TYPE_VIDEO,
        .config_props  = config_output,
    },
}

Definition at line 544 of file avf_showfreqs.c.

ff_avf_showfreqs

const FFFilter ff_avf_showfreqs

Initial value:

= {
    .p.name        = "showfreqs",
    .p.description = NULL_IF_CONFIG_SMALL("Convert input audio to a frequencies video output."),
    .p.priv_class  = &showfreqs_class,
    .uninit        = uninit,
    .priv_size     = sizeof(ShowFreqsContext),
    .activate      = activate,
    FILTER_INPUTS(ff_audio_default_filterpad),
    FILTER_OUTPUTS(showfreqs_outputs),
    FILTER_QUERY_FUNC2(query_formats),
}

Definition at line 552 of file avf_showfreqs.c.