omxicjp_dctquantfwd_s16_i.c

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

/**
 * 
 * File Name:  omxICJP_DCTQuantFwd_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 FDCT with quantization
 *
 */

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

#include "armCOMM.h"

/**
 * Function:  omxICJP_DCTQuantFwd_S16_I   (5.1.3.2.3)
 *
 * Description:
 * Computes the forward DCT and quantizes the output coefficients for the 
 * 8-bit image data in-place; processes a single 8x8 block. 
 *
 * Input Arguments:
 *   
 *   pSrcDst - pointer to input data block (8x8) buffer for in-place 
 *            processing; must be arranged in raster scan order and 8-byte 
 *            aligned.  The input components should be bounded on the interval 
 *            [-128, 127]. 
 *   pQuantFwdTable - pointer to the 64 entry quantization table generated 
 *            using DCTQuantFwdTableInit; must be aligned on an 8-byte 
 *            boundary. 
 *
 * Output Arguments:
 *   
 *   pSrcDst - pointer to the in-place output coefficient block (8x8) buffer; 
 *            must be 8-byte aligned.  The output 8x8 matrix is the transpose 
 *            of the explicit result; this transpose will be handled in 
 *            Huffman encoding. 
 *
 * 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 not 8-byte aligned: pSrcDst, 
 *              pQuantFwdTable. 
 *
 */
 
OMXResult omxICJP_DCTQuantFwd_S16_I(
     OMX_S16* pSrcDst,
     const OMX_U16 *pQuantFwdTable
 )
{
    OMXResult errorCode;
    OMX_S16   tempBuffer[67]; /*3 elements for alignment consideration*/
    OMX_S16   *pBuffer;
    OMX_INT   i;
    
    pBuffer = armAlignTo8Bytes(tempBuffer);
    
    errorCode = omxICJP_DCTQuantFwd_S16((const OMX_S16 *)pSrcDst,pBuffer,
                                                pQuantFwdTable);
 
    armRetArgErrIf(errorCode != OMX_Sts_NoErr, errorCode);
    
    for ( i = 0 ; i < 64 ; i++)
    {
        pSrcDst[i] = pBuffer[i];
    }

    return OMX_Sts_NoErr;
    
}

/* End of File */