libavfilter/vsrc_mandelbrot.c File Reference

Mandelbrot fraktal renderer. More...

#include "avfilter.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

Defines

#define SQR(a)   ((a)*(a))
#define OFFSET(x)   offsetof(MBContext, x)
#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

static const char * mandelbrot_get_name (void *ctx)
static av_cold int init (AVFilterContext *ctx, const char *args, void *opaque)
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 AVClass mandelbrot_class
AVFilter avfilter_vsrc_mandelbrot

Detailed Description

Mandelbrot fraktal renderer.

Definition in file vsrc_mandelbrot.c.

Define Documentation

#define OFFSET ( x   )     offsetof(MBContext, x)

Definition at line 78 of file vsrc_mandelbrot.c.

#define SQR ( a   )     ((a)*(a))

Definition at line 36 of file vsrc_mandelbrot.c.

Referenced by draw_mandelbrot().

#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 Inner

Enumerator:
BLACK 
PERIOD 
CONVTIME 
MINCOL 

Definition at line 43 of file vsrc_mandelbrot.c.

enum Outer

Enumerator:
ITERATION_COUNT 
NORMALIZED_ITERATION_COUNT 

Definition at line 38 of file vsrc_mandelbrot.c.

Function Documentation

static int config_props ( AVFilterLink *  inlink  )  [static]

Definition at line 178 of file vsrc_mandelbrot.c.

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

Definition at line 263 of file vsrc_mandelbrot.c.

Referenced by request_frame().

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

Definition at line 193 of file vsrc_mandelbrot.c.

Referenced by draw_mandelbrot().

static av_cold int init ( AVFilterContext *  ctx,
const char *  args,
void *  opaque 
) [static]

Definition at line 117 of file vsrc_mandelbrot.c.

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

Definition at line 209 of file vsrc_mandelbrot.c.

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

static const char* mandelbrot_get_name ( void *  ctx  )  [static]

Definition at line 106 of file vsrc_mandelbrot.c.

static int query_formats ( AVFilterContext *  ctx  )  [static]

Definition at line 167 of file vsrc_mandelbrot.c.

static int request_frame ( AVFilterLink *  link  )  [static]

Definition at line 395 of file vsrc_mandelbrot.c.

static av_cold void uninit ( AVFilterContext *  ctx  )  [static]

Definition at line 156 of file vsrc_mandelbrot.c.

Variable Documentation

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    = (const AVFilterPad[]) {{ .name = NULL}},

    .outputs   = (const AVFilterPad[]) {{ .name      = "default",
                                    .type            = AVMEDIA_TYPE_VIDEO,
                                    .request_frame   = request_frame,
                                    .config_props    = config_props },
                                  { .name = NULL}},
}

Definition at line 412 of file vsrc_mandelbrot.c.

const AVClass mandelbrot_class [static]

Initial value:

 {
    "MBContext",
    mandelbrot_get_name,
    mandelbrot_options
}

Definition at line 111 of file vsrc_mandelbrot.c.

const AVOption mandelbrot_options[] [static]

Initial value:

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

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

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

    {NULL},
}

Definition at line 80 of file vsrc_mandelbrot.c.

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