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vsrc_mandelbrot: Mandel morphing support 

Example: ffplay -f lavfi "mandelbrot=outer=outz:morphamp=1:end_scale=2:maxiter=100"

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2013-03-27 19:24:21 +01:00
parent 79938a4e97
commit 0d6e5a1712
1 changed files with 12 additions and 3 deletions
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15
libavfilter/vsrc_mandelbrot.c
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@ -77,6 +77,10 @@ typedef struct {
Point *next_cache;
double (*zyklus)[2];
uint32_t dither;
double morphxf;
double morphyf;
double morphamp;
} MBContext;
#define OFFSET(x) offsetof(MBContext, x)
@ -94,6 +98,9 @@ static const AVOption mandelbrot_options[] = {
{"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 },
{"morphxf", "set morph x frequency", OFFSET(morphxf), AV_OPT_TYPE_DOUBLE, {.dbl=0.01}, -FLT_MAX, FLT_MAX, FLAGS },
{"morphyf", "set morph y frequency", OFFSET(morphyf), AV_OPT_TYPE_DOUBLE, {.dbl=0.0123}, -FLT_MAX, FLT_MAX, FLAGS },
{"morphamp", "set morph amplitude", OFFSET(morphamp), AV_OPT_TYPE_DOUBLE, {.dbl=0}, -FLT_MAX, 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" },
@ -173,6 +180,8 @@ 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){
MBContext *mb = ctx->priv;
if(mb->morphamp)
return;
for(; *in_cidx < mb->cache_used; (*in_cidx)++){
Point *p= &mb->point_cache[*in_cidx];
int x;
@ -262,15 +271,15 @@ static void draw_mandelbrot(AVFilterContext *ctx, uint32_t *color, int linesize,
for(x=0; x<mb->w; x++){
float av_uninit(epsilon);
const double cr=mb->start_x+scale*(x-mb->w/2);
double zr=cr;
double zi=ci;
double zr=cr + cos(pts * mb->morphxf) * mb->morphamp;
double zi=ci + sin(pts * mb->morphyf) * mb->morphamp;
uint32_t c=0;
double dv= mb->dither / (double)(1LL<<32);
mb->dither= mb->dither*1664525+1013904223;
if(color[x + y*linesize] & 0xFF000000)
continue;
if(interpol(mb, color, x, y, linesize)){
if(!mb->morphamp && interpol(mb, color, x, y, linesize)){
if(next_cidx < mb->cache_allocated){
mb->next_cache[next_cidx ].p[0]= cr;
mb->next_cache[next_cidx ].p[1]= ci;