xref: /frameworks/av/media/libstagefright/codecs/on2/h264dec/omxdl/reference/vc/comm/src/omxVCCOMM_SAD_8x.c

/**
 *
 * File Name:  omxVCCOMM_SAD_8x.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 8x16, 8x8, 8x4 blocks
 *
 */

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

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

/**
 * Function:  omxVCCOMM_SAD_8x   (6.1.4.1.5)
 *
 * Description:
 * This function calculates the SAD for 8x16, 8x8, 8x4 blocks.
 *
 * Input Arguments:
 *
 *   pSrcOrg  - Pointer to the original block; must be aligned on a 8-byte
 *              boundary.
 *   iStepOrg - Step of the original block buffer
 *   pSrcRef  - Pointer to the reference block
 *   iStepRef - Step of the reference block buffer
 *   iHeight  - Height of the block
 *
 * Output Arguments:
 *
 *   pDstSAD -Pointer of result SAD
 *
 * Return Value:
 *
 *    OMX_Sts_NoErr - no error
 *    OMX_Sts_BadArgErr - bad arguments.  Returned if one or more of the
 *              following conditions is true:
 *    -    at least one of the following pointers is NULL:
 *         pSrcOrg, pDstSAD, or pSrcRef
 *    -    pSrcOrg is not 8-byte aligned.
 *    -    iStepOrg  <= 0 or iStepOrg is not a multiple of 8
 *    -    iStepRef <= 0 or iStepRef is not a multiple of 8
 *    -    iHeight is not 4, 8 or 16
 *
 */
OMXResult omxVCCOMM_SAD_8x(
	const OMX_U8* 	pSrcOrg,
	OMX_U32 	iStepOrg,
	const OMX_U8* 	pSrcRef,
	OMX_U32 	iStepRef,
	OMX_S32*	pDstSAD,
	OMX_U32		iHeight
)
{
    /* check for argument error */
    armRetArgErrIf(pSrcOrg == NULL, OMX_Sts_BadArgErr)
    armRetArgErrIf(pSrcRef == NULL, OMX_Sts_BadArgErr)
    armRetArgErrIf(pDstSAD == NULL, OMX_Sts_BadArgErr)
    armRetArgErrIf((iHeight != 16) && (iHeight != 8) && (iHeight != 4), OMX_Sts_BadArgErr)
    armRetArgErrIf(armNot8ByteAligned(pSrcOrg), OMX_Sts_BadArgErr)
    armRetArgErrIf((iStepOrg == 0) || (iStepOrg & 7), OMX_Sts_BadArgErr)
    armRetArgErrIf((iStepRef == 0) || (iStepRef & 7), OMX_Sts_BadArgErr)

    return armVCCOMM_SAD
        (pSrcOrg, iStepOrg, pSrcRef, iStepRef, pDstSAD, iHeight, 8);
}

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