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Code Issues Releases Activity

nicer looking arrows for the motion vector vissualization

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Originally committed as revision 2950 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Michael Niedermayer 2004-04-03 01:55:24 +00:00
parent 13d1512c43
commit 8100cab9c6
1 changed files with 11 additions and 7 deletions
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18
libavcodec/mpegvideo.c
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@ -815,9 +815,9 @@ void MPV_common_end(MpegEncContext *s)
s->last_picture_ptr=
s->next_picture_ptr=
s->current_picture_ptr= NULL;
for(i=0; i<3; i++)
if (s->visualization_buffer[i])
av_free(s->visualization_buffer[i]);
av_freep(&s->visualization_buffer[i]);
}
#ifdef CONFIG_ENCODERS
@ -1486,7 +1486,7 @@ void MPV_frame_end(MpegEncContext *s)
* @param color color of the arrow
*/
static void draw_line(uint8_t *buf, int sx, int sy, int ex, int ey, int w, int h, int stride, int color){
int t, x, y, f;
int t, x, y, fr, f;
sx= clip(sx, 0, w-1);
sy= clip(sy, 0, h-1);
@ -1504,8 +1504,10 @@ static void draw_line(uint8_t *buf, int sx, int sy, int ex, int ey, int w, int h
ex-= sx;
f= ((ey-sy)<<16)/ex;
for(x= 0; x <= ex; x++){
y= ((x*f) + (1<<15))>>16;
buf[y*stride + x]+= color;
y = (x*f)>>16;
fr= (x*f)&0xFFFF;
buf[ y *stride + x]+= (color*(0x10000-fr))>>16;
buf[(y+1)*stride + x]+= (color* fr )>>16;
}
}else{
if(sy > ey){
@ -1517,8 +1519,10 @@ static void draw_line(uint8_t *buf, int sx, int sy, int ex, int ey, int w, int h
if(ey) f= ((ex-sx)<<16)/ey;
else f= 0;
for(y= 0; y <= ey; y++){
x= ((y*f) + (1<<15))>>16;
buf[y*stride + x]+= color;
x = (y*f)>>16;
fr= (y*f)&0xFFFF;
buf[y*stride + x ]+= (color*(0x10000-fr))>>16;;
buf[y*stride + x+1]+= (color* fr )>>16;;
}
}
}