raw_number_select.c

在YUV的序列中

/*--------------------------------------------------------
brief	:	select N frame from X frame
author	:	Jun Wang
data	:	2008.08.8   																				    																				
--------------------------------------------------------*/

#include <stdio.h>
#include <time.h>
#include <math.h>
#include <stdlib.h>
#include <malloc.h>

typedef unsigned char	UCHAR;
typedef unsigned long	ULONG;

#define	Width 1280		//352, 1920, 1280
#define Height 720		//288, 1080, 720
 
#define RAW_FILE "720p50_shields_ter.yuv" 
#define RAW_CUT_FILE "shields_720p500f.yuv" 
#define SIZE (Width*Height)
#define Frame_num 500
#define Start_num 2	// count from 0

/*-----------------------------------------
brief	:  Main function.
-----------------------------------------*/ 

void main()
{
	int i;
	FILE 	*fraw, *fraw_t;
	UCHAR	*Y, *Cr, *Cb;	

	Y  = (UCHAR*)malloc(Width * Height);
	Cr = (UCHAR*)malloc((Width/2)*(Height/2));
	Cb = (UCHAR*)malloc((Width/2)*(Height/2));

	if ((fraw = fopen(RAW_FILE, "rb")) ==NULL)
	{       
			fprintf(stderr, "error: cannot open raw file!\n"); 
			exit(1); 
	}
		
	fraw_t = fopen(RAW_CUT_FILE, "wb");	
	
	for (i=0; i < (Frame_num+Start_num); i++)
	{		
		fread(Y , 1, SIZE  , fraw); 
		fread(Cr, 1, SIZE/4, fraw); 
		fread(Cb, 1, SIZE/4, fraw); 
			
		if(i>=Start_num)
		{
			fwrite(Y , 1, SIZE  , fraw_t);
			fwrite(Cr, 1, SIZE/4, fraw_t);
			fwrite(Cb, 1, SIZE/4, fraw_t);
		}	
									
	}									


	fclose (fraw);
	fclose (fraw_t);
	
	free(Y);
	free(Cr);
	free(Cb);

printf ("raw2bmp is success!!!\nyou are great!!!\n");	
}	//the end of main  //