omxicjp_dctquantinv_s16.c

来自「The OpenMAX DL (Development Layer) APIs 」· C语言 代码 · 共 79 行

/**
 * 
 * File Name:  omxICJP_DCTQuantInv_S16.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 IDCT with de-quantization
 *
 */

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

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

/**
 * Function:  omxICJP_DCTQuantInv_S16   (5.1.3.3.2)
 *
 * Description:
 * Computes an inverse DCT and inverse quantization for 8-bit image data; 
 * processes one block (8x8). 
 *
 * Input Arguments:
 *   
 *   pSrc - pointer to the input coefficient block (8x8) buffer; 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:
 *   
 *   pDst - pointer to the 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: pSrc, pDst, 
 *              pQuantInvTable. 
 *
 */

OMXResult omxICJP_DCTQuantInv_S16(
     const OMX_S16 *pSrc,
     OMX_S16 *pDst,
     const OMX_U32 *pQuantInvTable
 )
{
    /* Argument Checks */
    armRetArgErrIf( pSrc == NULL, OMX_Sts_BadArgErr)
    armRetArgErrIf( pDst == NULL, OMX_Sts_BadArgErr)
    
    armRetArgErrIf( pQuantInvTable == NULL            , OMX_Sts_BadArgErr)
    armRetArgErrIf( armNot8ByteAligned(pSrc)          , OMX_Sts_BadArgErr)
    armRetArgErrIf( armNot8ByteAligned(pDst)          , OMX_Sts_BadArgErr)
    armRetArgErrIf( armNot8ByteAligned(pQuantInvTable), OMX_Sts_BadArgErr)

    /* Processing */
    armICJP_DCTQuantInv_S16(pSrc, pDst, pQuantInvTable);
 
    return OMX_Sts_NoErr;
}

/*End of File*/