vsrc_mandelbrot.c File Reference

Mandelbrot fraktal renderer. More...

#include "avfilter.h"
#include "formats.h"
#include "video.h"
#include "internal.h"
#include "libavutil/imgutils.h"
#include "libavutil/opt.h"
#include "libavutil/parseutils.h"
#include <float.h>
#include <math.h>

Go to the source code of this file.

Data Structures
struct	Point
struct	MBContext

Macros
#define	SQR(a)   ((a)*(a))
#define	OFFSET(x)   offsetof(MBContext, x)
#define	FLAGS   AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM
#define	Z_Z2_C(outr, outi, inr, ini)
#define	Z_Z2_C_ZYKLUS(outr, outi, inr, ini, Z)

Enumerations
enum	Outer { ITERATION_COUNT, NORMALIZED_ITERATION_COUNT }
enum	Inner { BLACK, PERIOD, CONVTIME, MINCOL }

Functions
	AVFILTER_DEFINE_CLASS (mandelbrot)
static av_cold int	init (AVFilterContext *ctx, const char *args)
static av_cold void	uninit (AVFilterContext *ctx)
static int	query_formats (AVFilterContext *ctx)
static int	config_props (AVFilterLink *inlink)
static void	fill_from_cache (AVFilterContext *ctx, uint32_t *color, int *in_cidx, int *out_cidx, double py, double scale)
static int	interpol (MBContext *mb, uint32_t *color, int x, int y, int linesize)
static void	draw_mandelbrot (AVFilterContext *ctx, uint32_t *color, int linesize, int64_t pts)
static int	request_frame (AVFilterLink *link)

Variables
static const AVOption	mandelbrot_options []
static const AVFilterPad	mandelbrot_outputs []
AVFilter	avfilter_vsrc_mandelbrot

Detailed Description

Mandelbrot fraktal renderer.

Definition in file vsrc_mandelbrot.c.

Macro Definition Documentation

#define SQR

(

a

)

((a)*(a))

Definition at line 39 of file vsrc_mandelbrot.c.

Referenced by draw_mandelbrot().

#define OFFSET

(

x

)

offsetof(MBContext, x)

Definition at line 81 of file vsrc_mandelbrot.c.

#define FLAGS   AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM

Definition at line 82 of file vsrc_mandelbrot.c.

#define Z_Z2_C	(		outr,
			outi,
			inr,
			ini
	)

Value:

outr= inr*inr - ini*ini + cr;\
            outi= 2*inr*ini + ci;

#define Z_Z2_C_ZYKLUS	(		outr,
			outi,
			inr,
			ini,
			Z
	)

Value:

Z_Z2_C(outr,outi,inr,ini)\
            if(use_zyklus){\
                if(Z && fabs(mb->zyklus[i>>1][0]-outr)+fabs(mb->zyklus[i>>1][1]-outi) <= epsilon)\
                    break;\
            }\
            mb->zyklus[i][0]= outr;\
            mb->zyklus[i][1]= outi;\

Referenced by draw_mandelbrot().

Enumeration Type Documentation

enum Outer

Enumerator:

ITERATION_COUNT
NORMALIZED_ITERATION_COUNT

Definition at line 41 of file vsrc_mandelbrot.c.

enum Inner

Enumerator:

BLACK
PERIOD
CONVTIME
MINCOL

Definition at line 46 of file vsrc_mandelbrot.c.

Function Documentation

AVFILTER_DEFINE_CLASS

(

mandelbrot

)

static av_cold int init ( AVFilterContext *  ctx, const char *  args  )

static

Definition at line 112 of file vsrc_mandelbrot.c.

static av_cold void uninit ( AVFilterContext *  ctx )

static

Definition at line 144 of file vsrc_mandelbrot.c.

static int query_formats ( AVFilterContext *  ctx )

static

Definition at line 154 of file vsrc_mandelbrot.c.

static int config_props ( AVFilterLink *  inlink )

static

Definition at line 165 of file vsrc_mandelbrot.c.

static void fill_from_cache ( AVFilterContext *  ctx, uint32_t *  color, int *  in_cidx, int *  out_cidx, double  py, double  scale  )

static

Definition at line 180 of file vsrc_mandelbrot.c.

Referenced by draw_mandelbrot().

static int interpol ( MBContext *  mb, uint32_t *  color, int  x, int  y, int  linesize  )

static

Definition at line 196 of file vsrc_mandelbrot.c.

Referenced by dequant_lsp10r(), dequant_lsp16r(), and draw_mandelbrot().

static void draw_mandelbrot ( AVFilterContext *  ctx, uint32_t *  color, int  linesize, int64_t  pts  )

static

Definition at line 250 of file vsrc_mandelbrot.c.

Referenced by request_frame().

static int request_frame ( AVFilterLink *  link )

static

Definition at line 382 of file vsrc_mandelbrot.c.

Variable Documentation

const AVOption mandelbrot_options[]

static

Initial value:

= {
    {"size",        "set frame size",                OFFSET(w),       AV_OPT_TYPE_IMAGE_SIZE, {.str="640x480"},  CHAR_MIN, CHAR_MAX, FLAGS },
    {"s",           "set frame size",                OFFSET(w),       AV_OPT_TYPE_IMAGE_SIZE, {.str="640x480"},  CHAR_MIN, CHAR_MAX, FLAGS },
    {"rate",        "set frame rate",                OFFSET(rate),    AV_OPT_TYPE_STRING,     {.str="25"},  CHAR_MIN, CHAR_MAX, FLAGS },
    {"r",           "set frame rate",                OFFSET(rate),    AV_OPT_TYPE_STRING,     {.str="25"},  CHAR_MIN, CHAR_MAX, FLAGS },
    {"maxiter",     "set max iterations number",     OFFSET(maxiter), AV_OPT_TYPE_INT,        {.i64=7189},  1,        INT_MAX, FLAGS },
    {"start_x",     "set the initial x position",    OFFSET(start_x), AV_OPT_TYPE_DOUBLE,     {.dbl=-0.743643887037158704752191506114774}, -100, 100, FLAGS },
    {"start_y",     "set the initial y position",    OFFSET(start_y), AV_OPT_TYPE_DOUBLE,     {.dbl=-0.131825904205311970493132056385139}, -100, 100, FLAGS },
    {"start_scale", "set the initial scale value",   OFFSET(start_scale), AV_OPT_TYPE_DOUBLE, {.dbl=3.0},  0, FLT_MAX, FLAGS },
    {"end_scale",   "set the terminal scale value",  OFFSET(end_scale), AV_OPT_TYPE_DOUBLE,   {.dbl=0.3},  0, FLT_MAX, FLAGS },
    {"end_pts",     "set the terminal pts value",    OFFSET(end_pts), AV_OPT_TYPE_DOUBLE,     {.dbl=400},  0, INT64_MAX, FLAGS },
    {"bailout",     "set the bailout value",         OFFSET(bailout), AV_OPT_TYPE_DOUBLE,     {.dbl=10},   0, FLT_MAX, FLAGS },

    {"outer",       "set outer coloring mode",       OFFSET(outer), AV_OPT_TYPE_INT, {.i64=NORMALIZED_ITERATION_COUNT}, 0, INT_MAX, FLAGS, "outer" },
    {"iteration_count", "set iteration count mode",  0, AV_OPT_TYPE_CONST, {.i64=ITERATION_COUNT}, INT_MIN, INT_MAX, FLAGS, "outer" },
    {"normalized_iteration_count", "set normalized iteration count mode",   0, AV_OPT_TYPE_CONST, {.i64=NORMALIZED_ITERATION_COUNT}, INT_MIN, INT_MAX, FLAGS, "outer" },

    {"inner",       "set inner coloring mode",       OFFSET(inner), AV_OPT_TYPE_INT, {.i64=MINCOL}, 0, INT_MAX, FLAGS, "inner" },
    {"black",       "set black mode",                0, AV_OPT_TYPE_CONST, {.i64=BLACK}, INT_MIN, INT_MAX, FLAGS, "inner"},
    {"period",      "set period mode",               0, AV_OPT_TYPE_CONST, {.i64=PERIOD}, INT_MIN, INT_MAX, FLAGS, "inner"},
    {"convergence", "show time until convergence",   0, AV_OPT_TYPE_CONST, {.i64=CONVTIME}, INT_MIN, INT_MAX, FLAGS, "inner"},
    {"mincol",      "color based on point closest to the origin of the iterations",   0, AV_OPT_TYPE_CONST, {.i64=MINCOL}, INT_MIN, INT_MAX, FLAGS, "inner"},

    {NULL},
}

Definition at line 84 of file vsrc_mandelbrot.c.

const AVFilterPad mandelbrot_outputs[]

static

Initial value:

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

Definition at line 396 of file vsrc_mandelbrot.c.

AVFilter avfilter_vsrc_mandelbrot

Initial value:

= {
    .name        = "mandelbrot",
    .description = NULL_IF_CONFIG_SMALL("Render a Mandelbrot fractal."),

    .priv_size = sizeof(MBContext),
    .init      = init,
    .uninit    = uninit,

    .query_formats = query_formats,
    .inputs        = NULL,
    .outputs       = mandelbrot_outputs,
    .priv_class    = &mandelbrot_class,
}

Definition at line 406 of file vsrc_mandelbrot.c.