video.c

基于dsp的图像重现

#include <std.h>  //DSP/BIOS head file
#include <tsk.h>  
#include <sem.h>   
#include <gio.h>

#include <csl_dat.h> //CSL head file
#include <csl_cache.h>


#include <fvid.h>   //fvid head file
#include <edc.h>
#include <vport.h>
#include <vportcap.h>
#include <vportdis.h>
#include <saa7105.h>
#include <saa7115.h>    

#include "evmdm642.h"
#include "evmdm642_vcapparams.h"
#include "evmdm642_vdisparams.h"


extern Int EXTERNALHEAP;
static const  short coeffs[5] = {0x2543, 0x3313, -0x0C8A, -0x1A04, 0x408D}; //transfer matrix


main()
{
    /******************************************************/
    /* open CSL DAT module for fast copy                  */
    /******************************************************/
    CSL_init();                                             
    CACHE_clean(CACHE_L2ALL, 0, 0);
    CACHE_setL2Mode(CACHE_256KCACHE);       
    CACHE_enableCaching(CACHE_EMIFA_CE00);
    CACHE_enableCaching(CACHE_EMIFA_CE01);
   DAT_open(DAT_CHAANY, DAT_PRI_LOW, DAT_OPEN_2D);

}


void tskVideoLoopback()
{
    //initial display params
    Int status;
    FVID_Handle disChan; 
    Int frames = 0;
    FVID_Frame *disFrameBuf;
    Int numLinesDis = EVMDM642_vDisParamsChan.imgVSizeFld1;
    Int numLinesCap = EVMDM642_vCapParamsChan.fldYStop1 -
       EVMDM642_vCapParamsChan.fldYStrt1+1;

    
    Int numLines = (numLinesDis > numLinesCap) ? numLinesCap : numLinesDis;
    
    //initial capture params
    Int i;
    FVID_Handle capChan; 
    Int numPixels = EVMDM642_vCapParamsChan.fldXStop1 - 
       EVMDM642_vCapParamsChan.fldXStrt1+1;
    FVID_Frame *capFrameBuf;
    Int capLinePitch = EVMDM642_vCapParamsChan.fldXStop1 - 
       EVMDM642_vCapParamsChan.fldXStrt1+1;
    Int disLinePitch = EVMDM642_vDisParamsChan.imgHSizeFld1;
    
    
    numLines *= 2; /* both fields */
    
    /******************************************************/
    /* allocate both capture and display frame buffers    */
    /* in external heap memory                            */
    /******************************************************/
        EVMDM642_vCapParamsChan.segId = EXTERNALHEAP;
        EVMDM642_vDisParamsChan.segId = EXTERNALHEAP;
        EVMDM642_vDisParamsSAA7105.hI2C = EVMDM642_I2C_hI2C;
        EVMDM642_vCapParamsSAA7115.hI2C = EVMDM642_I2C_hI2C;
        
        
    /******************************************************/
    /* initialization of capture driver                   */
    /******************************************************/
    capChan = FVID_create("/VP0CAPTURE/A/0", 
            IOM_INPUT, &status, (Ptr)&EVMDM642_vCapParamsChan, NULL);
            
    /******************************************************/
    /* initialization of display driver                   */
    /******************************************************/
    disChan = FVID_create("/VP2DISPLAY", IOM_OUTPUT, 
        &status, (Ptr)&EVMDM642_vDisParamsChan, NULL);
        
       /******************************************************/
    /* configure video encoder & decoder                  */
    /******************************************************/
    FVID_control(disChan, VPORT_CMD_EDC_BASE + EDC_CONFIG, 
        (Ptr)&EVMDM642_vDisParamsSAA7105);

    FVID_control(capChan, VPORT_CMD_EDC_BASE + EDC_CONFIG, 
        (Ptr)&EVMDM642_vCapParamsSAA7115);
        
    /******************************************************/
    /* start capture & display operation                  */    
    /******************************************************/
    FVID_control(disChan, VPORT_CMD_START, NULL);
    FVID_control(capChan, VPORT_CMD_START, NULL);
    
    /********************************************************/
    /* request a frame buffer from display & capture driver */
    /********************************************************/
    FVID_alloc(disChan, &disFrameBuf);
    FVID_alloc(capChan, &capFrameBuf);
    
    frames ++;
    
    
    while(1){/* loop forever */

        /* copy data from capture buffer to display buffer */
        /***************************************************/
        for(i = 0; i < numLines; i++) 
        {
            yc2rgb16(coeffs, capFrameBuf->frame.iFrm.y1 + i * (capLinePitch),
                capFrameBuf->frame.iFrm.cb1 + (capLinePitch >> 1) * i, 
                capFrameBuf->frame.iFrm.cr1 + (capLinePitch >>1 ) * i, 
                disFrameBuf->frame.rpFrm.buf + (disLinePitch <<1) * i, 
                numPixels);
        }
        
        FVID_exchange(capChan, &capFrameBuf);
        
        
        CACHE_clean(CACHE_L2ALL, 0, 0);
        FVID_exchange(disChan, &disFrameBuf); 
        
        frames ++;              
   }
}