178e52bfac041d71ce53b5b13c2abf78af742b09dLajos Molnar/*
278e52bfac041d71ce53b5b13c2abf78af742b09dLajos Molnar * Copyright (C) 2007-2008 ARM Limited
378e52bfac041d71ce53b5b13c2abf78af742b09dLajos Molnar *
478e52bfac041d71ce53b5b13c2abf78af742b09dLajos Molnar * Licensed under the Apache License, Version 2.0 (the "License");
578e52bfac041d71ce53b5b13c2abf78af742b09dLajos Molnar * you may not use this file except in compliance with the License.
678e52bfac041d71ce53b5b13c2abf78af742b09dLajos Molnar * You may obtain a copy of the License at
778e52bfac041d71ce53b5b13c2abf78af742b09dLajos Molnar *
878e52bfac041d71ce53b5b13c2abf78af742b09dLajos Molnar *      http://www.apache.org/licenses/LICENSE-2.0
978e52bfac041d71ce53b5b13c2abf78af742b09dLajos Molnar *
1078e52bfac041d71ce53b5b13c2abf78af742b09dLajos Molnar * Unless required by applicable law or agreed to in writing, software
1178e52bfac041d71ce53b5b13c2abf78af742b09dLajos Molnar * distributed under the License is distributed on an "AS IS" BASIS,
1278e52bfac041d71ce53b5b13c2abf78af742b09dLajos Molnar * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
1378e52bfac041d71ce53b5b13c2abf78af742b09dLajos Molnar * See the License for the specific language governing permissions and
1478e52bfac041d71ce53b5b13c2abf78af742b09dLajos Molnar * limitations under the License.
1578e52bfac041d71ce53b5b13c2abf78af742b09dLajos Molnar *
1678e52bfac041d71ce53b5b13c2abf78af742b09dLajos Molnar */
170c1bc742181ded4930842b46e9507372f0b1b963James Dong/**
180c1bc742181ded4930842b46e9507372f0b1b963James Dong *
190c1bc742181ded4930842b46e9507372f0b1b963James Dong * File Name:  omxVCCOMM_ComputeTextureErrorBlock_SAD.c
200c1bc742181ded4930842b46e9507372f0b1b963James Dong * OpenMAX DL: v1.0.2
210c1bc742181ded4930842b46e9507372f0b1b963James Dong * Revision:   9641
220c1bc742181ded4930842b46e9507372f0b1b963James Dong * Date:       Thursday, February 7, 2008
230c1bc742181ded4930842b46e9507372f0b1b963James Dong *
240c1bc742181ded4930842b46e9507372f0b1b963James Dong *
250c1bc742181ded4930842b46e9507372f0b1b963James Dong *
260c1bc742181ded4930842b46e9507372f0b1b963James Dong *
270c1bc742181ded4930842b46e9507372f0b1b963James Dong * Description:
280c1bc742181ded4930842b46e9507372f0b1b963James Dong * Contains module computing the error for a MB of size 8x8
290c1bc742181ded4930842b46e9507372f0b1b963James Dong *
300c1bc742181ded4930842b46e9507372f0b1b963James Dong */
310c1bc742181ded4930842b46e9507372f0b1b963James Dong#include "omxtypes.h"
320c1bc742181ded4930842b46e9507372f0b1b963James Dong#include "armOMX.h"
330c1bc742181ded4930842b46e9507372f0b1b963James Dong#include "omxVC.h"
340c1bc742181ded4930842b46e9507372f0b1b963James Dong
350c1bc742181ded4930842b46e9507372f0b1b963James Dong#include "armCOMM.h"
360c1bc742181ded4930842b46e9507372f0b1b963James Dong
370c1bc742181ded4930842b46e9507372f0b1b963James Dong
380c1bc742181ded4930842b46e9507372f0b1b963James Dong/**
390c1bc742181ded4930842b46e9507372f0b1b963James Dong * Function:  omxVCCOMM_ComputeTextureErrorBlock_SAD   (6.1.4.1.1)
400c1bc742181ded4930842b46e9507372f0b1b963James Dong *
410c1bc742181ded4930842b46e9507372f0b1b963James Dong * Description:
420c1bc742181ded4930842b46e9507372f0b1b963James Dong * Computes texture error of the block; also returns SAD.
430c1bc742181ded4930842b46e9507372f0b1b963James Dong *
440c1bc742181ded4930842b46e9507372f0b1b963James Dong * Input Arguments:
450c1bc742181ded4930842b46e9507372f0b1b963James Dong *
460c1bc742181ded4930842b46e9507372f0b1b963James Dong *   pSrc - pointer to the source plane; must be aligned on an 8-byte
470c1bc742181ded4930842b46e9507372f0b1b963James Dong *            boundary.
480c1bc742181ded4930842b46e9507372f0b1b963James Dong *   srcStep - step of the source plane
490c1bc742181ded4930842b46e9507372f0b1b963James Dong *   pSrcRef - pointer to the reference buffer, an 8x8 block; must be aligned
500c1bc742181ded4930842b46e9507372f0b1b963James Dong *            on an 8-byte boundary.
510c1bc742181ded4930842b46e9507372f0b1b963James Dong *
520c1bc742181ded4930842b46e9507372f0b1b963James Dong * Output Arguments:
530c1bc742181ded4930842b46e9507372f0b1b963James Dong *
540c1bc742181ded4930842b46e9507372f0b1b963James Dong *   pDst - pointer to the destination buffer, an 8x8 block; must be aligned
550c1bc742181ded4930842b46e9507372f0b1b963James Dong *            on an 8-byte boundary.
560c1bc742181ded4930842b46e9507372f0b1b963James Dong *   pDstSAD - pointer to the Sum of Absolute Differences (SAD) value
570c1bc742181ded4930842b46e9507372f0b1b963James Dong *
580c1bc742181ded4930842b46e9507372f0b1b963James Dong * Return Value:
590c1bc742181ded4930842b46e9507372f0b1b963James Dong *
600c1bc742181ded4930842b46e9507372f0b1b963James Dong *    OMX_Sts_NoErr - no error
610c1bc742181ded4930842b46e9507372f0b1b963James Dong *    OMX_Sts_BadArgErr - bad arguments
620c1bc742181ded4930842b46e9507372f0b1b963James Dong *    -    At least one of the following
630c1bc742181ded4930842b46e9507372f0b1b963James Dong *         pointers is NULL: pSrc, pSrcRef, pDst and pDstSAD.
640c1bc742181ded4930842b46e9507372f0b1b963James Dong *    -    pSrc is not 8-byte aligned.
650c1bc742181ded4930842b46e9507372f0b1b963James Dong *    -    SrcStep <= 0 or srcStep is not a multiple of 8.
660c1bc742181ded4930842b46e9507372f0b1b963James Dong *    -    pSrcRef is not 8-byte aligned.
670c1bc742181ded4930842b46e9507372f0b1b963James Dong *    -    pDst is not 8-byte aligned.
680c1bc742181ded4930842b46e9507372f0b1b963James Dong *
690c1bc742181ded4930842b46e9507372f0b1b963James Dong */
700c1bc742181ded4930842b46e9507372f0b1b963James Dong
710c1bc742181ded4930842b46e9507372f0b1b963James DongOMXResult omxVCCOMM_ComputeTextureErrorBlock_SAD(
720c1bc742181ded4930842b46e9507372f0b1b963James Dong     const OMX_U8 *pSrc,
730c1bc742181ded4930842b46e9507372f0b1b963James Dong     OMX_INT srcStep,
740c1bc742181ded4930842b46e9507372f0b1b963James Dong     const OMX_U8 *pSrcRef,
750c1bc742181ded4930842b46e9507372f0b1b963James Dong     OMX_S16 * pDst,
760c1bc742181ded4930842b46e9507372f0b1b963James Dong     OMX_INT *pDstSAD
770c1bc742181ded4930842b46e9507372f0b1b963James Dong)
780c1bc742181ded4930842b46e9507372f0b1b963James Dong{
790c1bc742181ded4930842b46e9507372f0b1b963James Dong
800c1bc742181ded4930842b46e9507372f0b1b963James Dong    OMX_INT     x, y, count;
810c1bc742181ded4930842b46e9507372f0b1b963James Dong
820c1bc742181ded4930842b46e9507372f0b1b963James Dong    /* Argument error checks */
830c1bc742181ded4930842b46e9507372f0b1b963James Dong    armRetArgErrIf(pSrc == NULL, OMX_Sts_BadArgErr);
840c1bc742181ded4930842b46e9507372f0b1b963James Dong    armRetArgErrIf(pSrcRef == NULL, OMX_Sts_BadArgErr);
850c1bc742181ded4930842b46e9507372f0b1b963James Dong    armRetArgErrIf(pDst == NULL, OMX_Sts_BadArgErr);
860c1bc742181ded4930842b46e9507372f0b1b963James Dong    armRetArgErrIf(pDstSAD == NULL, OMX_Sts_BadArgErr);
870c1bc742181ded4930842b46e9507372f0b1b963James Dong    armRetArgErrIf(!armIs8ByteAligned(pSrc), OMX_Sts_BadArgErr);
880c1bc742181ded4930842b46e9507372f0b1b963James Dong    armRetArgErrIf(!armIs8ByteAligned(pSrcRef), OMX_Sts_BadArgErr);
890c1bc742181ded4930842b46e9507372f0b1b963James Dong    armRetArgErrIf(!armIs8ByteAligned(pDst), OMX_Sts_BadArgErr);
900c1bc742181ded4930842b46e9507372f0b1b963James Dong    armRetArgErrIf((srcStep <= 0) || (srcStep & 7), OMX_Sts_BadArgErr);
910c1bc742181ded4930842b46e9507372f0b1b963James Dong
920c1bc742181ded4930842b46e9507372f0b1b963James Dong    /* Calculate the error block */
930c1bc742181ded4930842b46e9507372f0b1b963James Dong    for (y = 0, count = 0, *pDstSAD = 0;
940c1bc742181ded4930842b46e9507372f0b1b963James Dong         y < 8;
950c1bc742181ded4930842b46e9507372f0b1b963James Dong         y++, pSrc += srcStep)
960c1bc742181ded4930842b46e9507372f0b1b963James Dong    {
970c1bc742181ded4930842b46e9507372f0b1b963James Dong        for (x = 0; x < 8; x++, count++)
980c1bc742181ded4930842b46e9507372f0b1b963James Dong        {
990c1bc742181ded4930842b46e9507372f0b1b963James Dong            pDst[count] = pSrc[x] - pSrcRef[count];
1000c1bc742181ded4930842b46e9507372f0b1b963James Dong            *pDstSAD += armAbs(pDst[count]);
1010c1bc742181ded4930842b46e9507372f0b1b963James Dong        }
1020c1bc742181ded4930842b46e9507372f0b1b963James Dong    }
1030c1bc742181ded4930842b46e9507372f0b1b963James Dong
1040c1bc742181ded4930842b46e9507372f0b1b963James Dong    return OMX_Sts_NoErr;
1050c1bc742181ded4930842b46e9507372f0b1b963James Dong
1060c1bc742181ded4930842b46e9507372f0b1b963James Dong}
1070c1bc742181ded4930842b46e9507372f0b1b963James Dong
1080c1bc742181ded4930842b46e9507372f0b1b963James Dong/* End of file */
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