From 0d6e5a17124d0452c3fb6482a3c6c9150ae9af68 Mon Sep 17 00:00:00 2001 From: Michael Niedermayer Date: Wed, 27 Mar 2013 19:24:21 +0100 Subject: vsrc_mandelbrot: Mandel morphing support Example: ffplay -f lavfi "mandelbrot=outer=outz:morphamp=1:end_scale=2:maxiter=100" Signed-off-by: Michael Niedermayer --- libavfilter/vsrc_mandelbrot.c | 15 ++++++++++++--- 1 file changed, 12 insertions(+), 3 deletions(-) (limited to 'libavfilter') diff --git a/libavfilter/vsrc_mandelbrot.c b/libavfilter/vsrc_mandelbrot.c index c323d10..b36301e 100644 --- a/libavfilter/vsrc_mandelbrot.c +++ b/libavfilter/vsrc_mandelbrot.c @@ -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; xw; 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; -- cgit v1.1