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

/* ----------------------------------------------------------------
 *
 *
 * File Name:  omxVCM4P10_DeblockLuma_I.c
 * OpenMAX DL: v1.0.2
 * Revision:   9641
 * Date:       Thursday, February 7, 2008
 *
 * (c) Copyright 2007-2008 ARM Limited. All Rights Reserved.
 *
 *
 *
 * 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;
}