vaf_spectrumsynth.c File Reference

SpectrumSynth filter. More...

#include "libavutil/mem.h"
#include "libavutil/tx.h"
#include "libavutil/avassert.h"
#include "libavutil/cpu.h"
#include "libavutil/ffmath.h"
#include "libavutil/opt.h"
#include "avfilter.h"
#include "formats.h"
#include "audio.h"
#include "filters.h"
#include "window_func.h"

Go to the source code of this file.

Data Structures
struct	SpectrumSynthContext

Macros
#define	OFFSET(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 , FULLFRAME , RSCROLL ,   NB_SLIDES }
enum	Orientation { VERTICAL , HORIZONTAL , NB_ORIENTATIONS }
enum	{ MAGNITUDE = 0 , PHASE = 1 }

Functions
	AVFILTER_DEFINE_CLASS (spectrumsynth)
static int	query_formats (const AVFilterContext *ctx, AVFilterFormatsConfig **cfg_in, AVFilterFormatsConfig **cfg_out)
static int	config_output (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	activate (AVFilterContext *ctx)
static av_cold void	uninit (AVFilterContext *ctx)

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

Detailed Description

SpectrumSynth filter.

Todo

support float pixel format

Definition in file vaf_spectrumsynth.c.

Macro Definition Documentation

OFFSET

#define OFFSET

(

x

)

Value:

offsetof(SpectrumSynthContext, x)

Definition at line 71 of file vaf_spectrumsynth.c.

A

#define A   AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_AUDIO_PARAM

Definition at line 72 of file vaf_spectrumsynth.c.

V

#define V   AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM

Definition at line 73 of file vaf_spectrumsynth.c.

Enumeration Type Documentation

MagnitudeScale

enum MagnitudeScale

Enumerator
LINEAR
LOG
NB_SCALES

Definition at line 39 of file vaf_spectrumsynth.c.

SlideMode

enum SlideMode

Enumerator
REPLACE
SCROLL
FULLFRAME
RSCROLL
NB_SLIDES

Definition at line 40 of file vaf_spectrumsynth.c.

Orientation

enum Orientation

Enumerator
VERTICAL
HORIZONTAL
NB_ORIENTATIONS

Definition at line 41 of file vaf_spectrumsynth.c.

anonymous enum

anonymous enum

Enumerator
MAGNITUDE
PHASE

Definition at line 96 of file vaf_spectrumsynth.c.

Function Documentation

AVFILTER_DEFINE_CLASS()

AVFILTER_DEFINE_CLASS

(

spectrumsynth

)

query_formats()

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

static

Definition at line 101 of file vaf_spectrumsynth.c.

config_output()

static int config_output ( AVFilterLink * outlink )

static

Definition at line 137 of file vaf_spectrumsynth.c.

read16_fft_bin()

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

static

Definition at line 227 of file vaf_spectrumsynth.c.

Referenced by read_fft_data().

read8_fft_bin()

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

static

Definition at line 252 of file vaf_spectrumsynth.c.

Referenced by read_fft_data().

read_fft_data()

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

static

Definition at line 277 of file vaf_spectrumsynth.c.

Referenced by synth_window().

synth_window()

static void synth_window ( AVFilterContext * ctx, int x )

static

Definition at line 323 of file vaf_spectrumsynth.c.

Referenced by try_push_frame().

try_push_frame()

static int try_push_frame ( AVFilterContext * ctx, int x )

static

Definition at line 347 of file vaf_spectrumsynth.c.

Referenced by try_push_frames().

try_push_frames()

static int try_push_frames ( AVFilterContext * ctx )

static

Definition at line 416 of file vaf_spectrumsynth.c.

Referenced by activate().

activate()

static int activate ( AVFilterContext * ctx )

static

Definition at line 455 of file vaf_spectrumsynth.c.

uninit()

static av_cold void uninit ( AVFilterContext * ctx )

static

Definition at line 494 of file vaf_spectrumsynth.c.

Variable Documentation

spectrumsynth_options

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, .unit = "scale" },
        { "lin",  "linear",      0, AV_OPT_TYPE_CONST, {.i64=LINEAR}, 0, 0, V, .unit = "scale" },
        { "log",  "logarithmic", 0, AV_OPT_TYPE_CONST, {.i64=LOG},    0, 0, V, .unit = "scale" },
    { "slide", "set input sliding mode", OFFSET(sliding), AV_OPT_TYPE_INT, {.i64 = FULLFRAME}, 0, NB_SLIDES-1, V, .unit = "slide" },
        { "replace",   "consume old columns with new",   0, AV_OPT_TYPE_CONST, {.i64=REPLACE},   0, 0, V, .unit = "slide" },
        { "scroll",    "consume only most right column", 0, AV_OPT_TYPE_CONST, {.i64=SCROLL},    0, 0, V, .unit = "slide" },
        { "fullframe", "consume full frames",            0, AV_OPT_TYPE_CONST, {.i64=FULLFRAME}, 0, 0, V, .unit = "slide" },
        { "rscroll",   "consume only most left column",  0, AV_OPT_TYPE_CONST, {.i64=RSCROLL},   0, 0, V, .unit = "slide" },
    WIN_FUNC_OPTION("win_func", OFFSET(win_func), A, 0),
    { "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, .unit = "orientation" },
        { "vertical",   NULL, 0, AV_OPT_TYPE_CONST, {.i64=VERTICAL},   0, 0, V, .unit = "orientation" },
        { "horizontal", NULL, 0, AV_OPT_TYPE_CONST, {.i64=HORIZONTAL}, 0, 0, V, .unit = "orientation" },
    { NULL }
}

Definition at line 75 of file vaf_spectrumsynth.c.

spectrumsynth_inputs

const AVFilterPad spectrumsynth_inputs[]

static

Initial value:

= {
    {
        .name         = "magnitude",
        .type         = AVMEDIA_TYPE_VIDEO,
    },
    {
        .name         = "phase",
        .type         = AVMEDIA_TYPE_VIDEO,
    },
}

Definition at line 518 of file vaf_spectrumsynth.c.

spectrumsynth_outputs

const AVFilterPad spectrumsynth_outputs[]

static

Initial value:

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

Definition at line 529 of file vaf_spectrumsynth.c.

ff_vaf_spectrumsynth

const FFFilter ff_vaf_spectrumsynth

Initial value:

= {
    .p.name        = "spectrumsynth",
    .p.description = NULL_IF_CONFIG_SMALL("Convert input spectrum videos to audio output."),
    .p.priv_class  = &spectrumsynth_class,
    .uninit        = uninit,
    .activate      = activate,
    .priv_size     = sizeof(SpectrumSynthContext),
    FILTER_INPUTS(spectrumsynth_inputs),
    FILTER_OUTPUTS(spectrumsynth_outputs),
    FILTER_QUERY_FUNC2(query_formats),
}

Definition at line 537 of file vaf_spectrumsynth.c.