avf_showspectrum.c File Reference

#include "config_components.h"
#include <float.h>
#include <math.h>
#include "libavutil/tx.h"
#include "libavutil/avassert.h"
#include "libavutil/avstring.h"
#include "libavutil/channel_layout.h"
#include "libavutil/cpu.h"
#include "libavutil/opt.h"
#include "libavutil/parseutils.h"
#include "libavutil/xga_font_data.h"
#include "audio.h"
#include "video.h"
#include "avfilter.h"
#include "filters.h"
#include "internal.h"
#include "window_func.h"

Go to the source code of this file.

Data Structures
struct	ShowSpectrumContext
struct	ColorTable

Macros
#define	DEFAULT_LENGTH   300
#define	OFFSET(x)   offsetof(ShowSpectrumContext, x)
#define	FLAGS   AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
#define	RE(y, ch)   s->fft_data[ch][y].re
#define	IM(y, ch)   s->fft_data[ch][y].im
#define	MAGNITUDE(y, ch)   hypotf(RE(y, ch), IM(y, ch))
#define	PHASE(y, ch)   atan2f(IM(y, ch), RE(y, ch))

Enumerations
enum	DisplayMode {   SINGLE, SEPARATE, NB_DMODES, LINE,   BAR, DOT, NB_MODES, COMBINED,   SEPARATE, NB_MODES }
enum	DataMode {   MAGNITUDE, PHASE, DELAY, NB_DATA,   D_MAGNITUDE, D_PHASE, D_UPHASE, NB_DMODES }
enum	FrequencyScale {   FSCALE_LINEAR, FSCALE_LOG2, FSCALE_BARK, FSCALE_MEL,   FSCALE_ERBS, NB_FSCALE, FS_LINEAR, FS_LOG,   FS_RLOG, NB_FSCALES, F_LINEAR, F_LOG,   NB_FSCALES }
enum	DisplayScale {   LINEAR, SQRT, CBRT, LOG,   RLOG, NB_SCALES, LINEAR, SQRT,   CBRT, LOG, FOURTHRT, FIFTHRT,   NB_SCALES, LINEAR, LOG, NB_DISPLAY_SCALE }
enum	ColorMode {   CHANNEL, INTENSITY, RAINBOW, MORELAND,   NEBULAE, FIRE, FIERY, FRUIT,   COOL, MAGMA, GREEN, VIRIDIS,   PLASMA, CIVIDIS, TERRAIN, NB_CLMODES,   COLOR_MODE_NONE = -1, COLOR_MODE_BT709, COLOR_MODE_FCC, COLOR_MODE_BT601,   COLOR_MODE_SMPTE240M, COLOR_MODE_BT2020, COLOR_MODE_COUNT }
enum	SlideMode {   REPLACE, SCROLL, NB_SLIDES, SLIDE_REPLACE,   SLIDE_SCROLL, SLIDE_FRAME, NB_SLIDE, REPLACE,   SCROLL, FULLFRAME, RSCROLL, LREPLACE,   NB_SLIDES, REPLACE, SCROLL, FULLFRAME,   RSCROLL, NB_SLIDES }
enum	Orientation {   VERTICAL, HORIZONTAL, NB_ORIENTATIONS, VERTICAL,   HORIZONTAL, NB_ORIENTATIONS }

Functions
	AVFILTER_DEFINE_CLASS (showspectrum)
static av_cold void	uninit (AVFilterContext *ctx)
static int	query_formats (AVFilterContext *ctx)
static int	run_channel_fft (AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
static void	drawtext (AVFrame *pic, int x, int y, const char *txt, int o)
static void	color_range (ShowSpectrumContext *s, int ch, float *yf, float *uf, float *vf)
static void	pick_color (ShowSpectrumContext *s, float yf, float uf, float vf, float a, float *out)
static char *	get_time (AVFilterContext *ctx, float seconds, int x)
static float	log_scale (const float bin, const float bmin, const float bmax, const float min, const float max)
static float	get_hz (const float bin, const float bmax, const float min, const float max, int fscale)
static float	inv_log_scale (float bin, float bmin, float bmax, float min, float max)
static float	bin_pos (const int bin, const int num_bins, const float min, const float max)
static float	get_scale (AVFilterContext *ctx, int scale, float a)
static float	get_iscale (AVFilterContext *ctx, int scale, float a)
static int	draw_legend (AVFilterContext *ctx, uint64_t samples)
static float	get_value (AVFilterContext *ctx, int ch, int y)
static int	plot_channel_lin (AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
static int	plot_channel_log (AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
static int	config_output (AVFilterLink *outlink)
static int	calc_channel_magnitudes (AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
static int	calc_channel_phases (AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
static void	unwrap (float *x, int N, float tol, float *mi, float *ma)
static int	calc_channel_uphases (AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
static void	acalc_magnitudes (ShowSpectrumContext *s)
static void	scale_magnitudes (ShowSpectrumContext *s, float scale)
static void	clear_combine_buffer (ShowSpectrumContext *s, int size)
static int	plot_spectrum_column (AVFilterLink *inlink, AVFrame *insamples)

Variables
static const AVOption	showspectrum_options []
static const struct ColorTable	color_table [][8]

Detailed Description

audio to spectrum (video) transmedia filter, based on ffplay rdft showmode (by Michael Niedermayer) and lavfi/avf_showwaves (by Stefano Sabatini).

Definition in file avf_showspectrum.c.

Macro Definition Documentation

DEFAULT_LENGTH

#define DEFAULT_LENGTH   300

Definition at line 57 of file avf_showspectrum.c.

OFFSET

#define OFFSET

(

x

)

offsetof(ShowSpectrumContext, x)

Definition at line 120 of file avf_showspectrum.c.

FLAGS

#define FLAGS   AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM

Definition at line 121 of file avf_showspectrum.c.

RE

#define RE	(		y,
			ch
	)		s->fft_data[ch][y].re

Definition at line 1311 of file avf_showspectrum.c.

IM

#define IM	(		y,
			ch
	)		s->fft_data[ch][y].im

Definition at line 1312 of file avf_showspectrum.c.

MAGNITUDE

#define MAGNITUDE	(		y,
			ch
	)		hypotf(RE(y, ch), IM(y, ch))

Definition at line 1313 of file avf_showspectrum.c.

PHASE

#define PHASE	(		y,
			ch
	)		atan2f(IM(y, ch), RE(y, ch))

Definition at line 1314 of file avf_showspectrum.c.

Enumeration Type Documentation

DisplayMode

enum DisplayMode

Enumerator
SINGLE
SEPARATE
NB_DMODES
LINE
BAR
DOT
NB_MODES
COMBINED
SEPARATE
NB_MODES

Definition at line 49 of file avf_showspectrum.c.

DataMode

enum DataMode

Enumerator
MAGNITUDE
PHASE
DELAY
NB_DATA
D_MAGNITUDE
D_PHASE
D_UPHASE
NB_DMODES

Definition at line 50 of file avf_showspectrum.c.

FrequencyScale

enum FrequencyScale

Enumerator
FSCALE_LINEAR
FSCALE_LOG2
FSCALE_BARK
FSCALE_MEL
FSCALE_ERBS
NB_FSCALE
FS_LINEAR
FS_LOG
FS_RLOG
NB_FSCALES
F_LINEAR
F_LOG
NB_FSCALES

Definition at line 51 of file avf_showspectrum.c.

DisplayScale

enum DisplayScale

Enumerator
LINEAR
SQRT
CBRT
LOG
RLOG
NB_SCALES
LINEAR
SQRT
CBRT
LOG
FOURTHRT
FIFTHRT
NB_SCALES
LINEAR
LOG
NB_DISPLAY_SCALE

Definition at line 52 of file avf_showspectrum.c.

ColorMode

enum ColorMode

Enumerator
CHANNEL
INTENSITY
RAINBOW
MORELAND
NEBULAE
FIRE
FIERY
FRUIT
COOL
MAGMA
GREEN
VIRIDIS
PLASMA
CIVIDIS
TERRAIN
NB_CLMODES
COLOR_MODE_NONE
COLOR_MODE_BT709
COLOR_MODE_FCC
COLOR_MODE_BT601
COLOR_MODE_SMPTE240M
COLOR_MODE_BT2020
COLOR_MODE_COUNT

Definition at line 53 of file avf_showspectrum.c.

SlideMode

enum SlideMode

Enumerator
REPLACE
SCROLL
NB_SLIDES
SLIDE_REPLACE
SLIDE_SCROLL
SLIDE_FRAME
NB_SLIDE
REPLACE
SCROLL
FULLFRAME
RSCROLL
LREPLACE
NB_SLIDES
REPLACE
SCROLL
FULLFRAME
RSCROLL
NB_SLIDES

Definition at line 54 of file avf_showspectrum.c.

Orientation

enum Orientation

Enumerator
VERTICAL
HORIZONTAL
NB_ORIENTATIONS
VERTICAL
HORIZONTAL
NB_ORIENTATIONS

Definition at line 55 of file avf_showspectrum.c.

Function Documentation

AVFILTER_DEFINE_CLASS()

AVFILTER_DEFINE_CLASS

(

showspectrum

)

uninit()

static av_cold void uninit ( AVFilterContext *  ctx )

static

Definition at line 301 of file avf_showspectrum.c.

query_formats()

static int query_formats ( AVFilterContext *  ctx )

static

Definition at line 359 of file avf_showspectrum.c.

run_channel_fft()

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

static

Definition at line 390 of file avf_showspectrum.c.

drawtext()

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

static

Definition at line 497 of file avf_showspectrum.c.

Referenced by draw_legend(), and plot_spectrum_column().

color_range()

static void color_range ( ShowSpectrumContext *  s, int  ch, float *  yf, float *  uf, float *  vf  )

static

Definition at line 552 of file avf_showspectrum.c.

Referenced by plot_channel_lin(), and plot_channel_log().

pick_color()

static void pick_color ( ShowSpectrumContext *  s, float  yf, float  uf, float  vf, float  a, float *  out  )

static

Definition at line 614 of file avf_showspectrum.c.

Referenced by draw_legend(), plot_channel_lin(), and plot_channel_log().

get_time()

static char* get_time ( AVFilterContext *  ctx, float  seconds, int  x  )

static

Definition at line 662 of file avf_showspectrum.c.

Referenced by draw_legend(), and plot_spectrum_column().

log_scale()

static float log_scale ( const float  bin, const float  bmin, const float  bmax, const float  min, const float  max  )

static

Definition at line 677 of file avf_showspectrum.c.

Referenced by get_hz().

get_hz()

static float get_hz ( const float  bin, const float  bmax, const float  min, const float  max, int  fscale  )

static

Definition at line 684 of file avf_showspectrum.c.

Referenced by draw_legend().

inv_log_scale()

static float inv_log_scale ( float  bin, float  bmin, float  bmax, float  min, float  max  )

static

Definition at line 698 of file avf_showspectrum.c.

Referenced by bin_pos().

bin_pos()

static float bin_pos ( const int  bin, const int  num_bins, const float  min, const float  max  )

static

Definition at line 705 of file avf_showspectrum.c.

Referenced by plot_channel_log().

get_scale()

static float get_scale ( AVFilterContext *  ctx, int  scale, float  a  )

static

Definition at line 710 of file avf_showspectrum.c.

Referenced by get_value().

get_iscale()

static float get_iscale ( AVFilterContext *  ctx, int  scale, float  a  )

static

Definition at line 745 of file avf_showspectrum.c.

Referenced by draw_legend().

draw_legend()

static int draw_legend ( AVFilterContext *  ctx, uint64_t  samples  )

static

Definition at line 779 of file avf_showspectrum.c.

Referenced by config_output().

get_value()

static float get_value ( AVFilterContext *  ctx, int  ch, int  y  )

static

Definition at line 981 of file avf_showspectrum.c.

Referenced by plot_channel_lin(), and plot_channel_log().

plot_channel_lin()

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

static

Definition at line 1005 of file avf_showspectrum.c.

Referenced by config_output().

plot_channel_log()

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

static

Definition at line 1028 of file avf_showspectrum.c.

Referenced by config_output().

config_output()

static int config_output ( AVFilterLink *  outlink )

static

Definition at line 1059 of file avf_showspectrum.c.

calc_channel_magnitudes()

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

static

Definition at line 1316 of file avf_showspectrum.c.

calc_channel_phases()

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

static

Definition at line 1331 of file avf_showspectrum.c.

unwrap()

static void unwrap ( float *  x, int  N, float  tol, float *  mi, float *  ma  )

static

Definition at line 1345 of file avf_showspectrum.c.

Referenced by calc_channel_uphases().

calc_channel_uphases()

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

static

Definition at line 1366 of file avf_showspectrum.c.

acalc_magnitudes()

static void acalc_magnitudes ( ShowSpectrumContext *  s )

static

Definition at line 1385 of file avf_showspectrum.c.

scale_magnitudes()

static void scale_magnitudes ( ShowSpectrumContext *  s, float  scale  )

static

Definition at line 1399 of file avf_showspectrum.c.

clear_combine_buffer()

static void clear_combine_buffer ( ShowSpectrumContext *  s, int  size  )

static

Definition at line 1411 of file avf_showspectrum.c.

Referenced by plot_spectrum_column().

plot_spectrum_column()

static int plot_spectrum_column ( AVFilterLink *  inlink, AVFrame *  insamples  )

static

Definition at line 1423 of file avf_showspectrum.c.

Variable Documentation

showspectrum_options

const AVOption showspectrum_options[]

static

Definition at line 123 of file avf_showspectrum.c.

color_table

const struct ColorTable color_table[][8]

static

Referenced by pick_color().