omxicjp_dctquantinv_s16_i.c

The OpenMAX DL (Development Layer) APIs contain a comprehensive set of audio, video, signal processi

/**
 * 
 * File Name:  omxICJP_DCTQuantInv_S16_I.c
 * OpenMAX DL: v1.0.2
 * Revision:   10586
 * Date:       Wednesday, March 5, 2008
 * 
 * (c) Copyright 2007-2008 ARM Limited. All Rights Reserved.
 * 
 * 
 *
 * Description:
 * This file contains module for inplace IDCT with de-quantization
 *
 */

#include "omxtypes.h"
#include "armOMX.h"
#include "omxIC.h"

#include "armCOMM.h"

/**
 * Function:  omxICJP_DCTQuantInv_S16_I   (5.1.3.3.3)
 *
 * Description:
 * Computes an inverse DCT and inverse quantization for 8-bit image data; 
 * processes one block (8x8) in-place. 
 *
 * Input Arguments:
 *   
 *   pSrcDst - pointer to the input coefficient block/output pixel block 
 *            buffer (8x8) for in-place processing; must be arranged in raster 
 *            scan order and 8-byte aligned.  Buffer values should lie in the 
 *            range [-2040, 2040]. 
 *   pQuantInvTable - pointer to the quantization table initialized using the 
 *            function DCTQuantInvTableInit. The table contains 64 entries and 
 *            the start address must be 8-byte aligned. 
 *
 * Output Arguments:
 *   
 *   pSrcDst - pointer to the in-place output pixel block(8x8) buffer; must 
 *            be 8-byte aligned. 
 *
 * Return Value:
 *    
 *    OMX_Sts_NoErr - no error 
 *    OMX_Sts_BadArgErr - Bad arguments. Returned for any of the following 
 *              conditions: 
 *    -    a pointer was NULL 
 *    -    one of the following pointers was not 8-byte aligned: pSrcDst, 
 *              pQuantInvTable. 
 *
 */

OMXResult omxICJP_DCTQuantInv_S16_I(
     OMX_S16* pSrcDst,
     const OMX_U32 *pQuantInvTable
 )
{
    OMXResult errorCode;
    OMX_S16   tempBuffer[67]; /*3 elements for alignment consideration*/
    OMX_S16   *pBuffer;
    OMX_INT   i;
    
    pBuffer = armAlignTo8Bytes(tempBuffer);
    
    errorCode = omxICJP_DCTQuantInv_S16((const OMX_S16 *)pSrcDst,pBuffer,
                                                pQuantInvTable);
 
    armRetArgErrIf(errorCode != OMX_Sts_NoErr, errorCode);
    
    for ( i = 0 ; i < 64 ; i++)
    {
        pSrcDst[i] = pBuffer[i];
    }

    return OMX_Sts_NoErr;
}

/*End of File*/