omxicjp_dctfwd_s16_i.c

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

/**
 * 
 * File Name:  omxICJP_DCTFwd_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 
 *
 */

#include "omxtypes.h"
#include "armOMX.h"
#include "armCOMM.h"

#include "omxIC.h"

/**
 * Function:  omxICJP_DCTFwd_S16_I   (5.1.3.2.5)
 *
 * Description:
 * This function implements forward DCT for the 8-bit image data (packed into 
 * signed 16-bit). It processes one block (8x8) in-place. The output matrix is 
 * the transpose of the explicit result.  As a result, the Huffman coding 
 * functions in this library handle transpose as well. 
 *
 * Input Arguments:
 *   
 *   pSrcDst - pointer to the input data block (8x8) buffer for in-place 
 *            processing.  The data must be arranged in raster scan order, and 
 *            the buffer base address must be 8-byte aligned.  The input 
 *            components are bounded on the interval [-128, 127] within a 
 *            16-bit container.  The output 8x8 matrix is the transpose of the 
 *            explicit result.  This transpose can be handled in later 
 *            processing stages (e.g. Huffman encoding). 
 *
 * Output Arguments:
 *
 * Return Value:
 *    
 *    OMX_Sts_NoErr - no error 
 *    OMX_Sts_BadArgErr - Bad arguments.  Returned for any of the following 
 *              conditions: a pointer was NULL pSrcDst was not 8-byte aligned. 
 *
 */

OMXResult omxICJP_DCTFwd_S16_I(
     OMX_S16* pSrc
 )
{
    OMXResult errorCode;
    OMX_S16   tempBuffer[67]; /*3 dummy elements for alignment consideration*/
    OMX_S16   *pBuffer;
    OMX_INT   i;
    
    pBuffer = armAlignTo8Bytes(tempBuffer);
    
    errorCode = omxICJP_DCTFwd_S16((const OMX_S16 *)pSrc,pBuffer);
                                                
    armRetArgErrIf(errorCode != OMX_Sts_NoErr, errorCode);
    
    for ( i = 0 ; i < 64 ; i++)
    {
        pSrc[i] = pBuffer[i];
    }

    return OMX_Sts_NoErr;
}

/*End of File*/