www.pudn.com > SobelEdge_all_2.rar > tskVideoOutput.c

/* 
 *  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  
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#include   
 
#include "seeddm642.h" 
#include "seedvpm642_vcapparams.h" 
#include "seedvpm642_vdisparams.h" 
 
#include "edc.h" 
#include "vportdis.h" 
#include "evmdm642.h"                           
#include "evmdm642_vdisparams.h" 
#include "appMain.h" 
#include "appThreads.h" 
#include "tskVideoOutput.h" 
#include "prepost.h" 
 
 
 
ScomBufChannels MsgOutput; 
 
/* heap IDs defined in the BIOS configuration file */ 
FVID_Handle  disChan; 
 
#pragma DATA_SECTION(scratch2,".internal_data1"); 
#pragma DATA_ALIGN(scratch2,8); 
unsigned char scratch2[20*LINE_SZ]; 
 
 
FVID_Handle  disChan; 
FVID_Frame *disFrameBuf; 
 
 
/*-------------------------------------------------------*/ 
/* Initialize the display channel                        */ 
/*-------------------------------------------------------*/ 
void tskVideoOutputInit() 
{ 
    int status;     
	 
	EVMDM642_vDisParamsChan.segId = EXTERNALHEAP; //EXTERNALHEAP; 
    EVMDM642_vDisParamsSAA7121.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_vDisParamsSAA7121);    
    /******************************************************/ 
    /* configure video encoder & decoder                  */ 
    /******************************************************/ 
    /*ÅäÖÃSAA7121*/ 
    FVID_control(disChan,  
    			 VPORT_CMD_EDC_BASE + EDC_CONFIG,  
                 (Ptr)&EVMDM642_vDisParamsSAA7121); 
 
} 
 
 
/*-------------------------------------------------------*/ 
/* Start the display channel                             */ 
/*-------------------------------------------------------*/ 
void tskVideoOutputStart()  
{ 
	FVID_control(disChan, VPORT_CMD_START, NULL); 
} 
 
 
 
/*-------------------------------------------------------*/ 
/* handle video display, scaling and re-format           */ 
/*-------------------------------------------------------*/ 
void tskVideoOutput() 
{ 
 
    unsigned char   *frame; 
    IMG in1,out1; 
    SCRATCH scr; 
     
    SCOM_Handle fromProctoOut,fromOuttoProc; 
	ScomBufChannels *pMsgBuf;  
    fromProctoOut = SCOM_open("PROCTOOUT"); 
	fromOuttoProc = SCOM_open("OUTTOPROC"); 
	FVID_alloc(disChan, &disFrameBuf); 
 
 	while(1) 
 	{ 
		/*-----------------------------------------------------------*/ 
  		/* Wait for the message from the process task to recieve new */ 
  		/* frame to be displayed.*/ 
   		/*-----------------------------------------------------------*/ 
 		pMsgBuf = SCOM_getMsg(fromProctoOut, SYS_FOREVER); 
        frame = (unsigned char *)pMsgBuf->bufChannel; 
            		    
 		in1.Y_data  = frame; 
 		in1.Cb_data = in1.Y_data + FRM_WIDTH*FRM_HEIGHT; 
		in1.Cr_data = in1.Cb_data + ((FRM_WIDTH*FRM_HEIGHT)>>2); 
 
		out1.Y_data = disFrameBuf->frame.iFrm.y1; 
		out1.Cb_data = disFrameBuf->frame.iFrm.cr1; 
		out1.Cr_data = disFrameBuf->frame.iFrm.cb1; 
 
 		scr.in_data = scratch2;	 
 		CACHE_clean(CACHE_L2ALL,NULL,NULL); 
 
 		/*-----------------------------------------------------------*/ 
 		/* Call YUV420to422v to do chroma resampling                 */ 
 		/*-----------------------------------------------------------*/ 
 		yuv420to422(&in1,&out1,FRM_WIDTH,FRM_HEIGHT,&scr);	 
 	 
		memset(out1.Cb_data,0x80,((FRM_WIDTH*FRM_HEIGHT)>>1)); 
 		memset(out1.Cr_data,0x80,((FRM_WIDTH*FRM_HEIGHT)>>1)); 
 		CACHE_clean(CACHE_L2ALL,NULL,NULL); 
 
       	/*-----------------------------------------------------------*/ 
       	/* Display the decoded frame.                                */ 
      	/*-----------------------------------------------------------*/ 
	    FVID_exchange(disChan, &disFrameBuf); 
   
 	  	/*-----------------------------------------------------------*/ 
   		/* Send message to process task to continue                  */ 
   		/*-----------------------------------------------------------*/ 
 	  	SCOM_putMsg(fromOuttoProc, NULL); 
	}	     
}