motion_detect.c

ADI的ADSP-BF561下实现多媒体开发的通用框架。

/********************************************************************
Function: motion_detect	
	
Description: Every macro-block of size 16*16 in the current frame is 
			 compared with the past_frame over a range of 3 macro-blocks
			 i.e. 3*16*16. The Y component is sub-sampled to 1/4.
********************************************************************/

#include <services/services.h>
#include <ezkitutilities.h>
#include <drivers/adi_dev.h>
#include <drivers/ppi/adi_ppi.h>
#include "../Buffer.h"
void motion_detect(unsigned char *ref_frame, unsigned char* curr_frame,unsigned int width, unsigned char* curr_out_frame)
{
	unsigned int i,j,k;
	int change=0;
	unsigned int W;
	W=1716;//width-5;
	char temp,temp1,temp2;
	
	for(k=18;k<104;k++)
	{
		change=0;
		for(j=0;j<L2NUMROWS;j++)
		{
			for (i=0;i<48;i+=8)
			{
				if(curr_frame[k*16+j*W+i+1]!=ref_frame[k*16+j*W+i+1])
				change++;
			}
			
		}
		
		if(change>47)
		{
			for(j=0;j<L2NUMROWS;j++)
			{
				for (i=0;i<16;i++)
				{
					curr_out_frame[k*16+j*W+i]=curr_frame[k*16+j*W+i];
				}
			}
			
		}//end of if
		else
		{
			for(j=0;j<L2NUMROWS;j++)
			{
				for (i=0;i<15;i+=2)
				{
					curr_out_frame[k*16+j*W+i+1]=0x10;
					curr_out_frame[k*16+j*W+i]=0x80;
				}
			}
		}//end of else
			
	
	}//end of k
}