omxicjp_dctquantinvtableinit.c

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

/**
 * 
 * File Name:  omxICJP_DCTQuantInvTableInit.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 table initialization for IDCT
 *
 */

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

#include "armIC.h"
#include "armCOMM.h"

/**
 * Function:  omxICJP_DCTQuantInvTableInit   (5.1.3.3.1)
 *
 * Description:
 * Initializes the JPEG IDCT inverse quantization table for 8-bit image data. 
 *
 * Input Arguments:
 *   
 *   pQuantRawTable - pointer to the raw (unprocessed) quantization table, 
 *            containing 64 entries; must be arranged in raster scan order and 
 *            aligned on an 8-byte boundary.  Table entries should lie within 
 *            the range [1,255]. 
 *
 * Output Arguments:
 *   
 *   pQuantInvTable - pointer to the initialized inverse quantization table; 
 *            must be aligned on an 8 byte boundary.  The table must contain 
 *            64 entries, and the implementation-specific contents must match 
 *            the table contents expected by the associated set of inverse DCT 
 *            quantization functions in the same OpenMAX DL implementation, 
 *            including the functions DCTQuantInv_S16, DCTQuantInv_S16_I, and 
 *            DCTQuantInv_Multiple_S16. 
 *
 * Return Value:
 *    
 *    OMX_Sts_NoErr - no error 
 *    OMX_Sts_BadArgErr - Bad arguments. Returned for any of the following 
 *              conditions: a pointer was NULL the start address of a pointer 
 *              was not 8-byte aligned. 
 *    -    one or more of the entries is equal to 0 in the table referenced 
 *              by pQuantRawTable. 
 *
 */

OMXResult omxICJP_DCTQuantInvTableInit (
     const OMX_U8 *pQuantRawTable,
     OMX_U32 *pQuantInvTable
 )
{
    OMX_INT i;
    OMX_U8  j;
    
    /* Argument Checks */
    armRetArgErrIf( pQuantRawTable == NULL, OMX_Sts_BadArgErr)
    armRetArgErrIf( pQuantInvTable == NULL, OMX_Sts_BadArgErr)
    
    armRetArgErrIf( armNot8ByteAligned(pQuantInvTable), OMX_Sts_BadArgErr)
    armRetArgErrIf( armNot8ByteAligned(pQuantRawTable), OMX_Sts_BadArgErr)

    /* Processing */
    for (i = 0; i < 64 ; i++ )
    {
        pQuantInvTable[i] = (OMX_U32) pQuantRawTable[i];
    }


    return OMX_Sts_NoErr;
}

/*End of File*/