tskvideoinput.c

基于DM642的mpeg2视频编码系统设计与实现 CCS下编写基于DSPBIOS的代码程序

/*
 *  Copyright 2003 by Texas Instruments Incorporated.
 *  All rights reserved. Property of Texas Instruments Incorporated.
 *  Restricted rights to use, duplicate or disclose this code are
 *  granted through contract.
 *  
 */
#include <std.h>
#include <csl.h>
#include <csl_dat.h>
#include <csl_cache.h>
#include <chan.h>
#include <scom.h>
#include <utl.h>
#include <fvid.h>
#include <tsk.h>

#include <edc.h>
#include <vport.h>
#include <vportcap.h>
#include <tvp51xx.h>    

#include <evmdm642.h>
#include <evmdm642_capParamsSDTVDefault.h>


#include "appMain.h"
#include "appThreads.h"
#include "tskVideoInput.h"

VPORT_PortParams EVMDM642_vCapParamsPort 
  = EVMDM642_CAP_PARAMS_PORT_EMBEDDED_DEFAULT;

#if defined _NTSC

static VPORTCAP_Params EVMDM642_vCapParamsChan 
  = EVMDM642_CAP_PARAMS_CHAN_EMBEDDED_DEFAULT(NTSC720);

static TVP51XX_ConfParams EVMDM642_vCapParamsTVP5146 
  = EVMDM642_CAP_PARAMS_TVP51XX_EMBEDDED_DEFAULT(NTSC601, COMPOSITE, 0);

#elif defined _PAL

static VPORTCAP_Params EVMDM642_vCapParamsChan 
  = EVMDM642_CAP_PARAMS_CHAN_EMBEDDED_DEFAULT(PAL720);

static TVP51XX_ConfParams EVMDM642_vCapParamsTVP5146 
  = EVMDM642_CAP_PARAMS_TVP51XX_EMBEDDED_DEFAULT(PAL601, COMPOSITE, 0);

#endif

ThrInput thrInput;
unsigned char* yuvBufIp[3];
unsigned char yBuf[LINE_SZ * NUM_LINES];
unsigned char cbBuf[LINE_SZ * NUM_LINES>>2];
unsigned char crBuf[LINE_SZ * NUM_LINES>>2];

FVID_Handle capChan;
FVID_Frame *capFrameBuf;

void tskVideoInputInit()
{
    
    int status;    

    yuvBufIp[0] = yBuf;
    yuvBufIp[1] = cbBuf;
    yuvBufIp[2] = crBuf;
    /******************************************************/
    /* allocate capture  frame buffers                    */
    /* in external heap memory                            */
    /******************************************************/
     EVMDM642_vCapParamsChan.segId = extHeap ;//EXTERNALHEAP;
     EVMDM642_vCapParamsTVP5146.hI2C = EVMDM642_I2C_hI2C;
     capChan = FVID_create("/VP0CAPTURE/A/0", 
        IOM_INPUT, &status, (Ptr)&EVMDM642_vCapParamsChan, NULL);

	 FVID_control(capChan, VPORT_CMD_EDC_BASE + EDC_CONFIG, 
      (Ptr)&EVMDM642_vCapParamsTVP5146);


	
}

/*-----------------------------------------------------------*/
/*Start the capturing                                        */
/*-----------------------------------------------------------*/
void tskVideoInputStart() 
{
	FVID_control(capChan, VPORT_CMD_START, NULL);
}

/*-----------------------------------------------------------*/
/* handle video capture, scaling and re-format               */
/*-----------------------------------------------------------*/
void tskVideoInput()
{
   	char *ycbcrBuf[3];    
   
    SCOM_Handle fromInputtoProc,fromOuttoInput;
    fromInputtoProc = SCOM_open("INTOPROC");
    fromOuttoInput = SCOM_open("OUTTOIN");


	FVID_alloc(capChan, &capFrameBuf);

 	while(1)
 	{

 		ycbcrBuf[0] = capFrameBuf->frame.iFrm.y1;
 		ycbcrBuf[1] = capFrameBuf->frame.iFrm.cb1;
 		ycbcrBuf[2] = capFrameBuf->frame.iFrm.cr1;				
		
 		/*-----------------------------------------------------------*/
		/* Call YUV422to420v to do chroma resampling                 */
 		/*-----------------------------------------------------------*/
		yuv422to420(ycbcrBuf,yuvBufIp,LINE_SZ, NUM_LINES);		 		

       	/*-----------------------------------------------------------*/
  		/* Send message to process task with pointers to captured frame*/
   		/*-----------------------------------------------------------*/
        (thrInput.scomMsgTx).bufChannel = (void *)&yuvBufIp[0];
    	SCOM_putMsg(fromInputtoProc, &(thrInput.scomMsgTx));

       	/*-----------------------------------------------------------*/
       	/* Capture a new frame.                                      */
      	/*-----------------------------------------------------------*/
    	FVID_exchange(capChan, &capFrameBuf);

		/*-----------------------------------------------------------*/
   		/* Wait for the message from the process task                */
   		/*-----------------------------------------------------------*/
       	SCOM_getMsg(fromOuttoInput, SYS_FOREVER);
	}	    
}