tskvideocapturevp2b.c

在DM642上实现双通道采集并实现了实时匹配

/*
 *  Copyright 2004 by SEED Incorporated.
 *  All rights reserved. Property of SEED Incorporated.
 *  Restricted rights to use, duplicate or disclose this code are
 *  granted through contract.
 *  
 */
#include <std.h>
#include <tsk.h>
#include <vport.h>
#include <vportcap.h>
#include <tvp51xx.h> 
#include <csl_edma.h>
#include <fvid.h>
#include <csl_dat.h>
#include <csl_cache.h>

#include <scom.h>
#include "seeddm642.h"
#include "seedvpm642cfg.h"
#include "seedvpm642_vcapparams.h"
#include "seedvpm642_tskvp2b.h"

extern int EXTERNALHEAP;
FVID_Handle capChanCh2b;
/*
 * ======== tskVideoCaptureVp2a init ========
 * video capture function init.
 */
void VideoCaptureVp2bInit()
{
	int status;
	
	SEEDVPM642_vCapParamsChan2b.segId = EXTERNALHEAP ;//EXTERNALHEAP;
    SEEDVPM642_vCapParamsTVP5150.hI2C = SEEDVPM642_I2C_hI2C; /*打开驱动程序*/

	/******************************************************/
    /* initialization of capture driver                   */
    /******************************************************/
	/*打开第一通路*/
	capChanCh2b  = FVID_create(	"/VP2BCAPTURE/B/2", 
            				    IOM_INPUT, 
            				    &status, 
            				    (Ptr)&SEEDVPM642_vCapParamsChan2b, 
            				    NULL);   	
    /******************************************************/
    /* configure video encoder 			                  */
    /******************************************************/
    /*配置第一通路的TVP5150*/
    FVID_control( capChanCh2b, 
    			  VPORT_CMD_EDC_BASE+EDC_CONFIG, 
        		  (Ptr)&SEEDVPM642_vCapParamsTVP5150);
}
/*
 * ======== tskVideoCaptureVp2a start ========
 * video capture function start.
 */
void VideocaptureVp2bStart()
{
	/*启动采集*/     		  
    FVID_control(capChanCh2b, VPORT_CMD_START, NULL);
}
/*
 * ======== tskVideoCaptureVp2a ========
 * video capture function.
 */
void tskVideoCaptureVp2b()
{
	FVID_Frame *capFrameBuf;
    SCOM_Handle fromInput2btoDIS,fromDIStoInput2b;
    
    /*打开SCOM模块*/
    fromInput2btoDIS = SCOM_open("IN2BTODIS");
    fromDIStoInput2b = SCOM_open("DISTOIN2B");
    /*申请一个空间*/
    FVID_alloc(capChanCh2b, &capFrameBuf);
	
	while(1)
    {		
		/*-----------------------------------------------------------*/
   		/* Send message to process task with pointers to captured frame*/
   		/*-----------------------------------------------------------*/
    	SCOM_putMsg(fromInput2btoDIS, (FVID_Frame *)capFrameBuf);
		
		/*-----------------------------------------------------------*/
   		/* Wait for the message from the process task                */
   		/*-----------------------------------------------------------*/
    	SCOM_getMsg(fromDIStoInput2b, SYS_FOREVER);
    	
    	/*-----------------------------------------------------------*/
    	/* Capture a new frame.                                      */
    	/*-----------------------------------------------------------*/
    	FVID_exchange(capChanCh2b, &capFrameBuf);	    
	}	
}