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

#include <math.h>
#include "libavcodec/avfft.h"
#include "libavutil/audio_fifo.h"
#include "libavutil/avassert.h"
#include "libavutil/avstring.h"
#include "libavutil/channel_layout.h"
#include "libavutil/opt.h"
#include "libavutil/xga_font_data.h"
#include "audio.h"
#include "video.h"
#include "avfilter.h"
#include "internal.h"
#include "window_func.h"

Classes
struct	ShowSpectrumContext

struct	ColorTable

Macros
#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) hypot(RE(y, ch), IM(y, ch))

#define	PHASE(y, ch) atan2(IM(y, ch), RE(y, ch))

Typedefs
typedef struct ShowSpectrumContext	ShowSpectrumContext

Enumerations
enum	DisplayMode { SINGLE, SEPARATE, NB_DMODES, LINE, BAR, DOT, NB_MODES, COMBINED, SEPARATE, NB_MODES }

enum	DataMode { D_MAGNITUDE, D_PHASE, NB_DMODES }

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, 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, REPLACE, SCROLL, FULLFRAME, RSCROLL, NB_SLIDES, REPLACE, SCROLL, FULLFRAME, RSCROLL, NB_SLIDES }

enum	Orientation { VERTICAL, HORIZONTAL, NB_ORIENTATIONS, VERTICAL, HORIZONTAL, NB_ORIENTATIONS }

Functions
	AVFILTER_DEFINE_CLASS (showspectrum)

Detailed Description

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

Classes

Macros

Typedefs

Enumerations

Functions

Detailed Description