@@ -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;

                 }