tskloopback.c

ｄｓｐ平台的一路采集显示算法源码。详细介绍路采集显示。

/*
 *  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.
 *  
 */
/* "@(#) DDK 1.11.00.00 23-12-04 (ddk-b13)" */
#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 "appData.h"
#include "seeddm642.h"
#include "seedvpm642cfg.h"
#include "seedvpm642_vcapparams.h"
#include "seedvpm642_vdisparams.h"
#include "seedvpm642_loopback.h"

extern int EXTERNALHEAP;
FVID_Handle  disChan;
Bool Ch1run =TRUE;
Bool Ch2arun =TRUE;
Bool Ch2brun =TRUE;
/*
 * ======== VideoLoopbackInit ========
 * video loopback function init.
 */
void VideoLoopbackInit()
{
	    
	Int status;
	
	EVMDM642_vDisParamsChan.segId = EXTERNALHEAP; //EXTERNALHEAP;
    EVMDM642_vDisParamsSAA7105.hI2C = SEEDVPM642_I2C_hI2C;
	/******************************************************/
    /* initialization of display driver                   */
    /******************************************************/     
    disChan = FVID_create("/VP0DISPLAY/A/0", 
    					  IOM_OUTPUT, 
        				  &status, 
        				  (Ptr)&EVMDM642_vDisParamsChan, 
        				  NULL);
    /******************************************************/
    /* configure video decoder      			          */
    /******************************************************/
    FVID_control(disChan, 
    			 VPORT_CMD_EDC_BASE + EDC_CONFIG, 
        		(Ptr)&EVMDM642_vDisParamsSAA7105);   
    /******************************************************/
    /* configure video encoder & decoder                  */
    /******************************************************/
    /*配置SAA7121*/
    FVID_control(disChan, 
    			 VPORT_CMD_EDC_BASE + EDC_CONFIG, 
                 (Ptr)&EVMDM642_vDisParamsSAA7105);
}
/*
 * ======== tskVideoLoopback start========
 * video loopback function start.
 */
void VideoLoopbackStart()
{
	/*启动显示*/
    FVID_control(disChan, VPORT_CMD_START, NULL);  	
}
/*
 * ======== tskVideoLoopback ========
 * video loopback function.
 */
void tskVideoLoopback()
{
	Int i;
	
	SCOM_Handle fromInput1toDIS,fromDIStoInput1;
	SCOM_Handle fromInput2atoDIS,fromDIStoInput2a;
	SCOM_Handle fromInput2btoDIS,fromDIStoInput2b;
		
	FVID_Frame *capFrameBuf;
	FVID_Frame *disFrameBuf;
    /*设置显示的行数*/
    Int numLinesDis = EVMDM642_vDisParamsChan.imgVSizeFld1;
    /*设置采集的行数*/
    Int numLinesCap = (SEEDVPM642_vCapParamsChan.fldYStop1 -
       			      SEEDVPM642_vCapParamsChan.fldYStrt1+1)/2;
    /*判断是显示区域大，还是采集区域大，取其小者*/   
    Int numLines = (numLinesDis > numLinesCap) ? numLinesCap : numLinesDis;
    /*设置采集像素数*/
    Int numPixels = (SEEDVPM642_vCapParamsChan.fldXStop1 - 
       			    SEEDVPM642_vCapParamsChan.fldXStrt1+1)/2;
    /*设置采集行的增量*/
    Int capLinePitch = (SEEDVPM642_vCapParamsChan.fldXStop1 - 
                       SEEDVPM642_vCapParamsChan.fldXStrt1+1)/2;
    /*设置显示行的增量*/
    Int disLinePitch = EVMDM642_vDisParamsChan.imgHSizeFld1;
    
    numLines *= 2; /* both fields */
      		         
    /*打开SCOM模块*/
    fromInput1toDIS = SCOM_open("IN1TODIS");
	fromDIStoInput1 = SCOM_open("DISTOIN1");

    /*申请一个空间*/
    FVID_alloc(disChan, &disFrameBuf); 
    
    while(1)
    {
	 	/*-----------------------------------------------------------*/
	  	/* Wait for the message from the process task to recieve new */
	  	/* frame to be displayed.                                    */
	   	/*-----------------------------------------------------------*/
	 	capFrameBuf = (FVID_Frame *)SCOM_getMsg(fromInput1toDIS, SYS_FOREVER);
		
		/*将数据放入相应的显示缓冲区*/
    	for(i = 0; i < numLines; i ++) 
        {
            DAT_copy(capFrameBuf->frame.iFrm.y1 + i * capLinePitch, 
                     disFrameBuf->frame.iFrm.y1 + i * disLinePitch+360,
                     numPixels);
            DAT_copy(capFrameBuf->frame.iFrm.cb1 + i * (capLinePitch >> 1), 
                     disFrameBuf->frame.iFrm.cb1 + i * (disLinePitch >> 1)+180,
                     numPixels>>1);

            DAT_copy(capFrameBuf->frame.iFrm.cr1 + i * (capLinePitch >> 1), 
                     disFrameBuf->frame.iFrm.cr1 + i * (disLinePitch >> 1)+180,
                     numPixels>>1);
        }
        DAT_wait(DAT_XFRID_WAITALL);		         
		CACHE_clean(CACHE_L2ALL,NULL,NULL);	
	   	/*-----------------------------------------------------------*/
	   	/* Display the decoded frame.                                */
	  	/*-----------------------------------------------------------*/
	    FVID_exchange(disChan, &disFrameBuf);
	
	  	/*-----------------------------------------------------------*/
		/* Send message to process task to continue                  */ 
		/*-----------------------------------------------------------*/
	 	SCOM_putMsg(fromDIStoInput1, NULL);/* loop forever */
    }
}