vaf_spectrumsynth.c File Reference

SpectrumSynth filter. More...

#include "libavcodec/avfft.h"
#include "libavutil/avassert.h"
#include "libavutil/channel_layout.h"
#include "libavutil/opt.h"
#include "libavutil/parseutils.h"
#include "avfilter.h"
#include "formats.h"
#include "audio.h"
#include "video.h"
#include "internal.h"
#include "window_func.h"

Go to the source code of this file.

Data Structures
struct	SpectrumSynthContext

Macros
#define	OFFSET(x)   offsetof(SpectrumSynthContext, x)
#define	A   AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_AUDIO_PARAM
#define	V   AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM

Enumerations
enum	MagnitudeScale { LINEAR, LOG, NB_SCALES }
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 (spectrumsynth)
static int	query_formats (AVFilterContext *ctx)
static int	config_output (AVFilterLink *outlink)
static int	request_frame (AVFilterLink *outlink)
static void	read16_fft_bin (SpectrumSynthContext *s, int x, int y, int f, int ch)
static void	read8_fft_bin (SpectrumSynthContext *s, int x, int y, int f, int ch)
static void	read_fft_data (AVFilterContext *ctx, int x, int h, int ch)
static void	synth_window (AVFilterContext *ctx, int x)
static int	try_push_frame (AVFilterContext *ctx, int x)
static int	try_push_frames (AVFilterContext *ctx)
static int	filter_frame_magnitude (AVFilterLink *inlink, AVFrame *magnitude)
static int	filter_frame_phase (AVFilterLink *inlink, AVFrame *phase)
static av_cold void	uninit (AVFilterContext *ctx)

Variables
static const AVOption	spectrumsynth_options []
static const AVFilterPad	spectrumsynth_inputs []
static const AVFilterPad	spectrumsynth_outputs []
AVFilter	ff_vaf_spectrumsynth

Detailed Description

SpectrumSynth filter.

Todo:

support float pixel format

Definition in file vaf_spectrumsynth.c.

Macro Definition Documentation

#define OFFSET

(

x

)

offsetof(SpectrumSynthContext, x)

Definition at line 70 of file vaf_spectrumsynth.c.

#define A   AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_AUDIO_PARAM

Definition at line 71 of file vaf_spectrumsynth.c.

#define V   AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM

Definition at line 72 of file vaf_spectrumsynth.c.

Enumeration Type Documentation

enum MagnitudeScale

Enumerator
LINEAR
LOG
NB_SCALES

Definition at line 39 of file vaf_spectrumsynth.c.

enum SlideMode

Enumerator
REPLACE
SCROLL
NB_SLIDES
REPLACE
SCROLL
FULLFRAME
RSCROLL
NB_SLIDES
REPLACE
SCROLL
FULLFRAME
RSCROLL
NB_SLIDES

Definition at line 40 of file vaf_spectrumsynth.c.

enum Orientation

Enumerator
VERTICAL
HORIZONTAL
NB_ORIENTATIONS
VERTICAL
HORIZONTAL
NB_ORIENTATIONS

Definition at line 41 of file vaf_spectrumsynth.c.

Function Documentation

AVFILTER_DEFINE_CLASS

(

spectrumsynth

)

static int query_formats ( AVFilterContext *  ctx )

static

Definition at line 101 of file vaf_spectrumsynth.c.

static int config_output ( AVFilterLink *  outlink )

static

Definition at line 143 of file vaf_spectrumsynth.c.

static int request_frame ( AVFilterLink *  outlink )

static

Definition at line 224 of file vaf_spectrumsynth.c.

static void read16_fft_bin ( SpectrumSynthContext *  s, int  x, int  y, int  f, int  ch  )

static

Definition at line 243 of file vaf_spectrumsynth.c.

Referenced by read_fft_data().

static void read8_fft_bin ( SpectrumSynthContext *  s, int  x, int  y, int  f, int  ch  )

static

Definition at line 268 of file vaf_spectrumsynth.c.

Referenced by read_fft_data().

static void read_fft_data ( AVFilterContext *  ctx, int  x, int  h, int  ch  )

static

Definition at line 293 of file vaf_spectrumsynth.c.

Referenced by synth_window().

static void synth_window ( AVFilterContext *  ctx, int  x  )

static

Definition at line 339 of file vaf_spectrumsynth.c.

Referenced by try_push_frame().

static int try_push_frame ( AVFilterContext *  ctx, int  x  )

static

Definition at line 364 of file vaf_spectrumsynth.c.

Referenced by try_push_frames().

static int try_push_frames ( AVFilterContext *  ctx )

static

Definition at line 431 of file vaf_spectrumsynth.c.

Referenced by filter_frame_magnitude(), and filter_frame_phase().

static int filter_frame_magnitude ( AVFilterLink *  inlink, AVFrame *  magnitude  )

static

Definition at line 470 of file vaf_spectrumsynth.c.

static int filter_frame_phase ( AVFilterLink *  inlink, AVFrame *  phase  )

static

Definition at line 479 of file vaf_spectrumsynth.c.

static av_cold void uninit ( AVFilterContext *  ctx )

static

Definition at line 488 of file vaf_spectrumsynth.c.

Variable Documentation

const AVOption spectrumsynth_options[]

static

Initial value:

= {
    { "sample_rate", "set sample rate",  OFFSET(sample_rate), AV_OPT_TYPE_INT, {.i64 = 44100}, 15,  INT_MAX, A },
    { "channels",    "set channels",     OFFSET(channels), AV_OPT_TYPE_INT, {.i64 = 1}, 1, 8, A },
    { "scale",       "set input amplitude scale", OFFSET(scale), AV_OPT_TYPE_INT, {.i64 = LOG}, 0, NB_SCALES-1, V, "scale" },
        { "lin",  "linear",      0, AV_OPT_TYPE_CONST, {.i64=LINEAR}, 0, 0, V, "scale" },
        { "log",  "logarithmic", 0, AV_OPT_TYPE_CONST, {.i64=LOG},    0, 0, V, "scale" },
    { "slide", "set input sliding mode", OFFSET(sliding), AV_OPT_TYPE_INT, {.i64 = FULLFRAME}, 0, NB_SLIDES-1, V, "slide" },
        { "replace",   "consume old columns with new",   0, AV_OPT_TYPE_CONST, {.i64=REPLACE},   0, 0, V, "slide" },
        { "scroll",    "consume only most right column", 0, AV_OPT_TYPE_CONST, {.i64=SCROLL},    0, 0, V, "slide" },
        { "fullframe", "consume full frames",            0, AV_OPT_TYPE_CONST, {.i64=FULLFRAME}, 0, 0, V, "slide" },
        { "rscroll",   "consume only most left column",  0, AV_OPT_TYPE_CONST, {.i64=RSCROLL},   0, 0, V, "slide" },
    { "win_func", "set window function", OFFSET(win_func), AV_OPT_TYPE_INT, {.i64 = 0}, 0, NB_WFUNC-1, A, "win_func" },
        { "rect",     "Rectangular",      0, AV_OPT_TYPE_CONST, {.i64=WFUNC_RECT},     0, 0, A, "win_func" },
        { "bartlett", "Bartlett",         0, AV_OPT_TYPE_CONST, {.i64=WFUNC_BARTLETT}, 0, 0, A, "win_func" },
        { "hann",     "Hann",             0, AV_OPT_TYPE_CONST, {.i64=WFUNC_HANNING},  0, 0, A, "win_func" },
        { "hanning",  "Hanning",          0, AV_OPT_TYPE_CONST, {.i64=WFUNC_HANNING},  0, 0, A, "win_func" },
        { "hamming",  "Hamming",          0, AV_OPT_TYPE_CONST, {.i64=WFUNC_HAMMING},  0, 0, A, "win_func" },
        { "sine",     "Sine",             0, AV_OPT_TYPE_CONST, {.i64=WFUNC_SINE},     0, 0, A, "win_func" },
    { "overlap", "set window overlap",  OFFSET(overlap), AV_OPT_TYPE_FLOAT, {.dbl=1}, 0,  1, A },
    { "orientation", "set orientation", OFFSET(orientation), AV_OPT_TYPE_INT, {.i64=VERTICAL}, 0, NB_ORIENTATIONS-1, V, "orientation" },
        { "vertical",   NULL, 0, AV_OPT_TYPE_CONST, {.i64=VERTICAL},   0, 0, V, "orientation" },
        { "horizontal", NULL, 0, AV_OPT_TYPE_CONST, {.i64=HORIZONTAL}, 0, 0, V, "orientation" },
    { NULL }
}

Definition at line 74 of file vaf_spectrumsynth.c.

const AVFilterPad spectrumsynth_inputs[]

static

Initial value:

= {
    {
        .name         = "magnitude",
        .type         = AVMEDIA_TYPE_VIDEO,
        .filter_frame = filter_frame_magnitude,
        .needs_fifo   = 1,
    },
    {
        .name         = "phase",
        .type         = AVMEDIA_TYPE_VIDEO,
        .filter_frame = filter_frame_phase,
        .needs_fifo   = 1,
    },
    { NULL }
}

Definition at line 505 of file vaf_spectrumsynth.c.

const AVFilterPad spectrumsynth_outputs[]

static

Initial value:

= {
    {
        .name          = "default",
        .type          = AVMEDIA_TYPE_AUDIO,
        .config_props  = config_output,
        .request_frame = request_frame,
    },
    { NULL }
}

Definition at line 521 of file vaf_spectrumsynth.c.

AVFilter ff_vaf_spectrumsynth

Initial value:

= {
    .name          = "spectrumsynth",
    .description   = NULL_IF_CONFIG_SMALL("Convert input spectrum videos to audio output."),
    .uninit        = uninit,
    .query_formats = query_formats,
    .priv_size     = sizeof(SpectrumSynthContext),
    .inputs        = spectrumsynth_inputs,
    .outputs       = spectrumsynth_outputs,
    .priv_class    = &spectrumsynth_class,
}

Definition at line 531 of file vaf_spectrumsynth.c.