celljpegdec_ti.c

图像处理的应用实例

/*
 *  Copyright 2002 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.
 *
 */
/* "@(#) RF5_IEK 1.20.07 09-26-02 (swat-c12)" */
/*
 *  ======== celljpegdec.c ========
 */

#include <stdio.h>
#include <stdlib.h>


#include <std.h>

#include <log.h>
#include <tsk.h>

#include <algrf.h>
#include <icell.h>
#include <utl.h>

#include "celljpegdec_ti.h"
#include "ijpegdec.h"

#include <dman.h>

#include "appThreads.h"
#include "appResources.h"

extern far IDMA2_Fxns JPEGDEC_IDMA2;        /* the algorithm's IDMA2 v-table */

// v-table for this cell
ICELL_Fxns JPEGDEC_CELLFXNS =
{
    JPEGDEC_cellClose,      // cellClose
    NULL,                  // cellControl
    JPEGDEC_cellExecute,    // cellExecute
    JPEGDEC_cellOpen        // cellOpen
};

/*
 *  ======== JPEGDEC_cellClose ========
 *
 */
Bool JPEGDEC_cellClose( ICELL_Handle handle )
{
    // Withdraw DMA resources from algorithm
    return (DMAN_removeAlg((IALG_Handle)handle->algHandle, &JPEGDEC_IDMA2));
}



/*
 *  ======== JPEGDEC_cellExecute ========
 *
 */
Bool JPEGDEC_cellExecute( ICELL_Handle handle, Arg arg )
{
    int ret_val;
    unsigned int **Input = handle->inputIcc[0]->buffer;

    UTL_stsStart( stsExeTimeChJpegDec );

    // activate instance object
    ALGRF_activate( handle->algHandle );

    // call JPEG decode through IALG layer

    ret_val = ((IJPEGDEC_Fxns *)(handle->algFxns))->decode
                        (
                           (IJPEGDEC_Handle)handle->algHandle,
                           (XDAS_Int8 *)(Input[1]),
                           (XDAS_Int8 **)handle->outputIcc[0]->buffer
                        );

    // negative value here, implies incorrect decode.
    UTL_assert(ret_val >= 0);

    // deactivate instance object
    ALGRF_deactivate( handle->algHandle );

    UTL_stsStop( stsExeTimeChJpegDec );

    return(1);
}

/*
 *  ======== JPEGDEC_cellOpen ========
 *
 */
Bool JPEGDEC_cellOpen( ICELL_Handle handle )
{
    // Grant DMA resources
    return (DMAN_addAlg((IALG_Handle)handle->algHandle, &JPEGDEC_IDMA2));
}

/*------------------------------------------------------------------*/
/* Texas Instruments Incorporated 1997-2003.                        */
/*==================================================================*/
/*                                                                  */
/*------------------------------------------------------------------*/