av/media/libstagefright/codecs/on2/h264dec/omxdl/reference/vc/m4p10/src/omxVCM4P10_DeblockLuma_I.c

/*
 * Copyright (C) 2007-2008 ARM Limited
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 */
/* ----------------------------------------------------------------
 *
 * 
 * File Name:  omxVCM4P10_DeblockLuma_I.c
 * OpenMAX DL: v1.0.2
 * Revision:   9641
 * Date:       Thursday, February 7, 2008
 * 
 * 
 * 
 *
 * H.264 luma deblock
 * 
 */
 
#include "omxtypes.h"
#include "armOMX.h"
#include "omxVC.h"

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

/**
 * Function:  omxVCM4P10_DeblockLuma_I   (6.3.3.3.5)
 *
 * Description:
 * This function performs in-place deblock filtering the horizontal and 
 * vertical edges of a luma macroblock (16x16). 
 *
 * Input Arguments:
 *   
 *   pSrcDst - pointer to the input macroblock; must be 16-byte aligned. 
 *   srcdstStep - image width; must be a multiple of 16. 
 *   pAlpha - pointer to a 2x2 table of alpha thresholds, organized as 
 *            follows: {external vertical edge, internal vertical edge, 
 *            external horizontal edge, internal horizontal edge }.  Per 
 *            [ISO14496-10] alpha values must be in the range [0,255]. 
 *   pBeta - pointer to a 2x2 table of beta thresholds, organized as follows: 
 *            {external vertical edge, internal vertical edge, external 
 *            horizontal edge, internal horizontal edge }.  Per [ISO14496-10] 
 *            beta values must be in the range [0,18]. 
 *   pThresholds - pointer to a 16x2 table of threshold (TC0), organized as 
 *            follows: {values for the left or above edge of each 4x4 block, 
 *            arranged in vertical block order and then in horizontal block 
 *            order}; must be aligned on a 4-byte boundary.  Per [ISO14496-10] 
 *            values must be in the range [0,25]. 
 *   pBS - pointer to a 16x2 table of BS parameters arranged in scan block 
 *            order for vertical edges and then horizontal edges; valid in the 
 *            range [0,4] with the following restrictions: i) pBS[i]== 4 may 
 *            occur only for 0<=i<=3, ii) pBS[i]== 4 if and only if pBS[i^3]== 
 *            4. Must be 4-byte aligned. 
 *
 * Output Arguments:
 *   
 *   pSrcDst - pointer to filtered output macroblock. 
 *
 * Return Value:
 *    
 *    OMX_Sts_NoErr - no error 
 *    OMX_Sts_BadArgErr - bad arguments 
 *    -     one or more of the following pointers is NULL: pSrcDst, pAlpha, 
 *              pBeta, pThresholds or pBS. pSrcDst is not 16-byte aligned. 
 *              either pThresholds or pBS is not aligned on a 4-byte boundary. 
 *    -    one or more entries in the table pAlpha[0..3] is outside the range 
 *              [0,255]. 
 *    -    one or more entries in the table pBeta[0..3] is outside the range 
 *              [0,18]. 
 *    -    one or more entries in the table pThresholds[0..31]is outside of 
 *              the range [0,25]. 
 *    -    pBS is out of range, i.e., one of the following conditions is true: 
 *              pBS[i]<0, pBS[i]>4, pBS[i]==4 for i>=4, or 
 *             (pBS[i]==4 && pBS[i^3]!=4) for 0<=i<=3. 
 *    -    srcdstStep is not a multiple of 16. 
 *
 */

OMXResult omxVCM4P10_DeblockLuma_I(
	OMX_U8* pSrcDst, 
	OMX_S32 srcdstStep, 
	const OMX_U8* pAlpha, 
	const OMX_U8* pBeta, 
	const OMX_U8* pThresholds, 
	const OMX_U8 *pBS
)
{
    OMXResult errorCode;
    
    armRetArgErrIf(pSrcDst == NULL,             OMX_Sts_BadArgErr);
    armRetArgErrIf(armNot16ByteAligned(pSrcDst), OMX_Sts_BadArgErr);
    armRetArgErrIf(srcdstStep & 15,              OMX_Sts_BadArgErr);    
    armRetArgErrIf(pAlpha == NULL,              OMX_Sts_BadArgErr);
    armRetArgErrIf(pBeta == NULL,               OMX_Sts_BadArgErr);
    armRetArgErrIf(pThresholds == NULL,         OMX_Sts_BadArgErr);
    armRetArgErrIf(armNot4ByteAligned(pThresholds), OMX_Sts_BadArgErr);
    armRetArgErrIf(pBS == NULL,                     OMX_Sts_BadArgErr);
    armRetArgErrIf(armNot4ByteAligned(pBS),         OMX_Sts_BadArgErr);

    errorCode = omxVCM4P10_FilterDeblockingLuma_VerEdge_I(
        pSrcDst, srcdstStep, pAlpha, pBeta, pThresholds, pBS);

    armRetArgErrIf(errorCode != OMX_Sts_NoErr, errorCode)
    
    errorCode = omxVCM4P10_FilterDeblockingLuma_HorEdge_I(
        pSrcDst, srcdstStep, pAlpha+2, pBeta+2, pThresholds+16, pBS+16);

    return errorCode;
}