| /* |
| * 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: omxVCCOMM_ComputeTextureErrorBlock_SAD.c |
| * OpenMAX DL: v1.0.2 |
| * Revision: 9641 |
| * Date: Thursday, February 7, 2008 |
| * |
| * |
| * |
| * |
| * Description: |
| * Contains module computing the error for a MB of size 8x8 |
| * |
| */ |
| #include "omxtypes.h" |
| #include "armOMX.h" |
| #include "omxVC.h" |
| |
| #include "armCOMM.h" |
| |
| |
| /** |
| * Function: omxVCCOMM_ComputeTextureErrorBlock_SAD (6.1.4.1.1) |
| * |
| * Description: |
| * Computes texture error of the block; also returns SAD. |
| * |
| * Input Arguments: |
| * |
| * pSrc - pointer to the source plane; must be aligned on an 8-byte |
| * boundary. |
| * srcStep - step of the source plane |
| * pSrcRef - pointer to the reference buffer, an 8x8 block; must be aligned |
| * on an 8-byte boundary. |
| * |
| * Output Arguments: |
| * |
| * pDst - pointer to the destination buffer, an 8x8 block; must be aligned |
| * on an 8-byte boundary. |
| * pDstSAD - pointer to the Sum of Absolute Differences (SAD) value |
| * |
| * Return Value: |
| * |
| * OMX_Sts_NoErr - no error |
| * OMX_Sts_BadArgErr - bad arguments |
| * - At least one of the following |
| * pointers is NULL: pSrc, pSrcRef, pDst and pDstSAD. |
| * - pSrc is not 8-byte aligned. |
| * - SrcStep <= 0 or srcStep is not a multiple of 8. |
| * - pSrcRef is not 8-byte aligned. |
| * - pDst is not 8-byte aligned. |
| * |
| */ |
| |
| OMXResult omxVCCOMM_ComputeTextureErrorBlock_SAD( |
| const OMX_U8 *pSrc, |
| OMX_INT srcStep, |
| const OMX_U8 *pSrcRef, |
| OMX_S16 * pDst, |
| OMX_INT *pDstSAD |
| ) |
| { |
| |
| OMX_INT x, y, count; |
| |
| /* Argument error checks */ |
| armRetArgErrIf(pSrc == NULL, OMX_Sts_BadArgErr); |
| armRetArgErrIf(pSrcRef == NULL, OMX_Sts_BadArgErr); |
| armRetArgErrIf(pDst == NULL, OMX_Sts_BadArgErr); |
| armRetArgErrIf(pDstSAD == NULL, OMX_Sts_BadArgErr); |
| armRetArgErrIf(!armIs8ByteAligned(pSrc), OMX_Sts_BadArgErr); |
| armRetArgErrIf(!armIs8ByteAligned(pSrcRef), OMX_Sts_BadArgErr); |
| armRetArgErrIf(!armIs8ByteAligned(pDst), OMX_Sts_BadArgErr); |
| armRetArgErrIf((srcStep <= 0) || (srcStep & 7), OMX_Sts_BadArgErr); |
| |
| /* Calculate the error block */ |
| for (y = 0, count = 0, *pDstSAD = 0; |
| y < 8; |
| y++, pSrc += srcStep) |
| { |
| for (x = 0; x < 8; x++, count++) |
| { |
| pDst[count] = pSrc[x] - pSrcRef[count]; |
| *pDstSAD += armAbs(pDst[count]); |
| } |
| } |
| |
| return OMX_Sts_NoErr; |
| |
| } |
| |
| /* End of file */ |