video_scaling.c

TI evm642的源码,给那些没有买TI的评估板,却想要评估板程序的人.

/*
 *  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.
 *  
 */
/* "@(#) DDK 1.10.00.21 06-26-03 (ddk-b10)" */
#include <std.h>
#include <tsk.h>  
#include <sem.h>   
#include <gio.h>

#include <csl_dat.h>
#include <csl_cache.h>


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

#include <evmdm642.h>

#include "colorbar.h"
#include "evmdm642_vcapparams.h"
#include "evmdm642_vdisparams.h"   


#ifdef _NTSC_SRC
#include "../settings/evmdm642_vdisparamsNTSC.c"  
#endif

#ifdef _PAL_SRC
#include "../settings/evmdm642_vdisparamsPAL.c"
#endif


/* heap IDs defined in the BIOS configuration file */
extern Int EXTERNALHEAP;


/*
 * ======== main ========
 */
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);          
}

/*
 * ======== tskVideoLoopback ========
 * video loopback function.
 */
void tskVideoLoopback()
{
    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;                 
    Int xOffset;
    Int yOffset;

    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;


    /* since the default setting is for NTSC, we need to adjust */
    /* that if capture input is in PAL format                   */
    #ifdef _PAL
    EVMDM642_vCapParamsSAA7115.inMode = SAA7115_MODE_PAL720;
    #endif
    
    
    if(EVMDM642_vCapParamsChan.fldOp == VPORT_FLDOP_FRAME) {    
        numLinesCap *= 2; /* account for both fields */
    }                         
    if(EVMDM642_vDisParamsChan.fldOp == VPORT_FLDOP_FRAME) {    
        numLinesDis *= 2; /* account for both fields */
    }                         
    numLines = (numLinesCap < numLinesDis) ? numLinesCap : numLinesDis;
    
    xOffset = (disLinePitch - capLinePitch) >> 1;
    yOffset = (numLinesDis - numLinesCap ) >> 1;
    yOffset &= ~1; /* make sure it is even */
    if( xOffset < 0) {
        xOffset = 0;
    }
    if( yOffset < 0) {
        yOffset = 0;
    }
    /******************************************************/
    /* 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 */
        Int i;
        /* copy data from capture buffer to display buffer */
        /***************************************************/

        for(i = 0; i < numLines; i ++) {
            DAT_copy(capFrameBuf->frame.iFrm.y1 + i * capLinePitch, 
                     disFrameBuf->frame.iFrm.y1 + i * disLinePitch 
                     + xOffset + yOffset * disLinePitch,
                     numPixels);
            DAT_copy(capFrameBuf->frame.iFrm.cb1 + i * (capLinePitch >> 1), 
                     disFrameBuf->frame.iFrm.cb1 + 
                     (i + yOffset) * (disLinePitch >> 1) + (xOffset >> 1),
                     numPixels>>1);

            DAT_copy(capFrameBuf->frame.iFrm.cr1 + i * (capLinePitch >> 1), 
                     disFrameBuf->frame.iFrm.cr1 + 
                     (i + yOffset) * (disLinePitch >> 1) + (xOffset >> 1),
                     numPixels>>1);
        }
        FVID_exchange(capChan, &capFrameBuf);
        FVID_exchange(disChan, &disFrameBuf);
        
        frames ++;              
   }
}