xref: /frameworks/av/media/libstagefright/codecs/on2/h264dec/omxdl/reference/vc/m4p10/src/omxVCM4P10_InterpolateHalfVer_Luma.c

/**
 *
 * File Name:  omxVCM4P10_InterpolateHalfVer_Luma.c
 * OpenMAX DL: v1.0.2
 * Revision:   9641
 * Date:       Thursday, February 7, 2008
 *
 * (c) Copyright 2007-2008 ARM Limited. All Rights Reserved.
 *
 *
 * Description:
 * This function will calculate SAD for 4x4 blocks
 *
 */

#include "omxtypes.h"
#include "armOMX.h"
#include "omxVC.h"

#include "armCOMM.h"
#include "armVC.h"


/**
 * Function:  omxVCM4P10_InterpolateHalfVer_Luma   (6.3.5.5.2)
 *
 * Description:
 * This function performs interpolation for two vertical 1/2-pel positions -
 * (0, -1/2) and (0, 1/2) - around a full-pel position.
 *
 * Input Arguments:
 *
 *   pSrc - Pointer to top-left corner of block used to interpolate in the
 *            reconstructed frame plane
 *   iSrcStep - Step of the source buffer.
 *   iDstStep - Step of the destination (interpolation) buffer; must be a
 *            multiple of iWidth.
 *   iWidth - Width of the current block; must be equal to either 4, 8, or 16
 *   iHeight - Height of the current block; must be equal to either 4, 8, or 16
 *
 * Output Arguments:
 *
 *   pDstUp -Pointer to the interpolation buffer of the -pel position above
 *            the current full-pel position (0, -1/2)
 *                If iWidth==4, 4-byte alignment required.
 *                If iWidth==8, 8-byte alignment required.
 *                If iWidth==16, 16-byte alignment required.
 *   pDstDown -Pointer to the interpolation buffer of the -pel position below
 *            the current full-pel position (0, 1/2)
 *                If iWidth==4, 4-byte alignment required.
 *                If iWidth==8, 8-byte alignment required.
 *                If iWidth==16, 16-byte alignment required.
 *
 * Return Value:
 *
 *    OMX_Sts_NoErr - no error
 *    OMX_Sts_BadArgErr - bad arguments; returned if any of the following
 *              conditions are true:
 *    -    at least one of the following pointers is NULL:
 *            pSrc, pDstUp, or pDstDown
 *    -    iWidth or iHeight have values other than 4, 8, or 16
 *    -    iWidth==4 but pDstUp and/or pDstDown is/are not aligned on a 4-byte boundary
 *    -    iWidth==8 but pDstUp and/or pDstDown is/are not aligned on a 8-byte boundary
 *    -    iWidth==16 but pDstUp and/or pDstDown is/are not aligned on a 16-byte boundary
 *
 */
 OMXResult omxVCM4P10_InterpolateHalfVer_Luma(
     const OMX_U8*    pSrc,
     OMX_U32    iSrcStep,
     OMX_U8*    pDstUp,
     OMX_U8*    pDstDown,
     OMX_U32    iDstStep,
     OMX_U32    iWidth,
     OMX_U32    iHeight
)
{
    OMXResult   RetValue;

    /* check for argument error */
    armRetArgErrIf(pSrc == NULL, OMX_Sts_BadArgErr)
    armRetArgErrIf(pDstUp == NULL, OMX_Sts_BadArgErr)
    armRetArgErrIf(pDstDown == NULL, OMX_Sts_BadArgErr)
    armRetArgErrIf((iWidth == 4) &&
                   armNot4ByteAligned(pDstUp) &&
                   armNot4ByteAligned(pDstDown), OMX_Sts_BadArgErr)
    armRetArgErrIf((iWidth == 8) &&
                   armNot8ByteAligned(pDstUp) &&
                   armNot8ByteAligned(pDstDown), OMX_Sts_BadArgErr)
    armRetArgErrIf((iWidth == 16) &&
                   armNot16ByteAligned(pDstUp) &&
                   armNot16ByteAligned(pDstDown), OMX_Sts_BadArgErr)

    armRetArgErrIf((iHeight != 16) && (iHeight != 8)&& (iHeight != 4), OMX_Sts_BadArgErr)
	armRetArgErrIf((iWidth != 16) && (iWidth != 8)&& (iWidth != 4), OMX_Sts_BadArgErr)

    RetValue = armVCM4P10_InterpolateHalfVer_Luma(
        pSrc - iSrcStep,
        iSrcStep,
        pDstUp,
        iDstStep,
        iWidth,
        iHeight);

    if (RetValue != OMX_Sts_NoErr)
    {
        return RetValue;
    }

    RetValue = armVCM4P10_InterpolateHalfVer_Luma(
        pSrc,
        iSrcStep,
        pDstDown,
        iDstStep,
        iWidth,
        iHeight);

    return RetValue;
}

/*****************************************************************************
 *                              END OF FILE
 *****************************************************************************/