omxicjp_dctinv_s16.c

来自「The OpenMAX DL (Development Layer) APIs 」· C语言 代码 · 共 73 行

/**
 * 
 * File Name:  omxICJP_DCTInv_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
 *
 */

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

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

/**
 * Function:  omxICJP_DCTInv_S16   (5.1.3.3.4)
 *
 * Description:
 * This function implements inverse DCT for 8-bit image data.  It processes 
 * one block (8x8). 
 *
 * Input Arguments:
 *   
 *   pSrc - pointer to the input DCT coefficient block (8x8) buffer; must be 
 *            arranged in raster scan order, and the start address must be 
 *            8-byte aligned.  Buffer values should lie in the range [-2040, 
 *            2040]. 
 *
 * Output Arguments:
 *   
 *   pDst - pointer to the output image pixel data block(8x8) buffer.  The 
 *            start address 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 the start address of a pointer 
 *              was not 8-byte aligned. 
 *
 */
 
OMXResult omxICJP_DCTInv_S16(
     const OMX_S16 *pSrc,
     OMX_S16 *pDst
 )
{

    /* Argument Checks */
    armRetArgErrIf( pSrc == NULL, OMX_Sts_BadArgErr)
    armRetArgErrIf( pDst == NULL, OMX_Sts_BadArgErr)
    
    armRetArgErrIf( armNot8ByteAligned(pSrc), OMX_Sts_BadArgErr)
    armRetArgErrIf( armNot8ByteAligned(pDst), OMX_Sts_BadArgErr)

    /* Processing */
    armICJP_DCTQuantInv_S16(pSrc, pDst, NULL);

    return OMX_Sts_NoErr;
}

/*End of File*/