RepoMirrors
/
ffmpeg
mirror of https://git.ffmpeg.org/ffmpeg.git
1
0
Fork 0
Code Issues Projects Releases Wiki Activity

vsrc_mandelbrot: factorize main calculation out into a macro. 

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2011-11-19 13:51:44 +01:00
parent 0af8d20755
commit cf670fbc96
1 changed files with 6 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

10
libavfilter/vsrc_mandelbrot.c
View File

@ -233,6 +233,10 @@ static void draw_mandelbrot(AVFilterContext *ctx, uint32_t *color, int linesize,
use_zyklus= (x==0 || mb->inner!=BLACK ||color[x-1 + y*linesize] == 0xFF000000); use_zyklus= (x==0 || mb->inner!=BLACK ||color[x-1 + y*linesize] == 0xFF000000);
#define Z_Z2_C(outr,outi,inr,ini)\
outr= inr*inr - ini*ini + cr;\
outi= 2*inr*ini + ci;
for(i=0; i<mb->maxiter; i++){ for(i=0; i<mb->maxiter; i++){
double t; double t;
if(zr*zr + zi*zi > mb->bailout){ if(zr*zr + zi*zi > mb->bailout){
@ -243,15 +247,13 @@ static void draw_mandelbrot(AVFilterContext *ctx, uint32_t *color, int linesize,
c= lrintf((sin(zr)+1)*127) + lrintf((sin(zr/1.234)+1)*127)*256*256 + lrintf((sin(zr/100)+1)*127)*256; c= lrintf((sin(zr)+1)*127) + lrintf((sin(zr/1.234)+1)*127)*256*256 + lrintf((sin(zr/100)+1)*127)*256;
break; break;
} }
t= zr*zr - zi*zi + cr; Z_Z2_C(t, zi, zr, zi)
zi= 2*zr*zi + ci;
if(use_zyklus){ if(use_zyklus){
mb->zyklus[i][0]= t; mb->zyklus[i][0]= t;
mb->zyklus[i][1]= zi; mb->zyklus[i][1]= zi;
} }
i++; i++;
zr= t*t - zi*zi+cr; Z_Z2_C(zr, zi, t, zi)
zi= 2*t*zi + ci;
if(use_zyklus){ if(use_zyklus){
if(mb->zyklus[i>>1][0]==zr && mb->zyklus[i>>1][1]==zi) if(mb->zyklus[i>>1][0]==zr && mb->zyklus[i>>1][1]==zi)
break; break;