diff options
| author | Michael Niedermayer <michaelni@gmx.at> | 2011-11-11 23:22:04 +0100 |
|---|---|---|
| committer | Michael Niedermayer <michaelni@gmx.at> | 2011-11-11 23:22:04 +0100 |
| commit | 4ccd898af2a5cf86a005c5f9861676c1b63448d4 (patch) | |
| tree | 8e5018ab574d0fe1767aff29a0e05037a3e5ce70 /libavfilter | |
| parent | 75e309160bae8071575aae0d7eb81a58a7322e45 (diff) | |
mandelbrot: support different outer coloring methods.
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
Diffstat (limited to 'libavfilter')
| -rw-r--r-- | libavfilter/vsrc_mandelbrot.c | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/libavfilter/vsrc_mandelbrot.c b/libavfilter/vsrc_mandelbrot.c index 6987501888..fef5733bed 100644 --- a/libavfilter/vsrc_mandelbrot.c +++ b/libavfilter/vsrc_mandelbrot.c @@ -30,6 +30,11 @@ #include "libavutil/imgutils.h" #include "libavutil/parseutils.h" +enum Outer{ + ITERATION_COUNT, + NORMALIZED_ITERATION_COUNT, +}; + typedef struct { int w, h; AVRational time_base; @@ -39,6 +44,7 @@ typedef struct { double start_y; double start_scale; double bailout; + enum Outer outer; } MBContext; static av_cold int init(AVFilterContext *ctx, const char *args, void *opaque) @@ -54,6 +60,7 @@ static av_cold int init(AVFilterContext *ctx, const char *args, void *opaque) mb->start_y=-1.5; mb->start_scale=3.0; mb->bailout=100; + mb->outer= NORMALIZED_ITERATION_COUNT; if (args) sscanf(args, "%127[^:]:%127[^:]:%d,%lf:%lf:%lf", frame_size, frame_rate, &mb->maxiter, &mb->start_x, &mb->start_y, &mb->start_scale); @@ -123,7 +130,10 @@ static void draw_mandelbrot(AVFilterContext *ctx, uint32_t *color, int linesize, for(i=0; i<256; i++){ double t; if(zr*zr + zi*zi > mb->bailout){ - zr= i + (log(log(mb->bailout)) - log(log(sqrt(zr*zr + zi*zi))))/log(2); break; + switch(mb->outer){ + case ITERATION_COUNT: zr= i; break; + case NORMALIZED_ITERATION_COUNT: zr= i + (log(log(mb->bailout)) - log(log(sqrt(zr*zr + zi*zi))))/log(2); break; + } c= lrintf((sin(zr)+1)*127) + lrintf((sin(zr/1.234)+1)*127)*256*256 + lrintf((sin(zr/100)+1)*127)*256; break; } |