| /* |
| * 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_Average_8x.c |
| * OpenMAX DL: v1.0.2 |
| * Revision: 9641 |
| * Date: Thursday, February 7, 2008 |
| * |
| * |
| * |
| * Description: |
| * This function will calculate Average of two 8x4 or 8x8 or 8x16 blocks |
| * |
| */ |
| |
| #include "omxtypes.h" |
| #include "armOMX.h" |
| #include "omxVC.h" |
| |
| #include "armCOMM.h" |
| #include "armVC.h" |
| |
| /** |
| * Function: omxVCCOMM_Average_8x (6.1.3.1.1) |
| * |
| * Description: |
| * This function calculates the average of two 8x4, 8x8, or 8x16 blocks. The |
| * result is rounded according to (a+b+1)/2. The block average function can |
| * be used in conjunction with half-pixel interpolation to obtain quarter |
| * pixel motion estimates, as described in [ISO14496-10], subclause 8.4.2.2.1. |
| * |
| * Input Arguments: |
| * |
| * pPred0 - Pointer to the top-left corner of reference block 0 |
| * pPred1 - Pointer to the top-left corner of reference block 1 |
| * iPredStep0 - Step of reference block 0 |
| * iPredStep1 - Step of reference block 1 |
| * iDstStep - Step of the destination buffer. |
| * iHeight - Height of the blocks |
| * |
| * Output Arguments: |
| * |
| * pDstPred - Pointer to the destination buffer. 8-byte aligned. |
| * |
| * Return Value: |
| * |
| * OMX_Sts_NoErr - no error |
| * OMX_Sts_BadArgErr - bad arguments; returned under any of the following |
| * conditions: |
| * - one or more of the following pointers is NULL: pPred0, pPred1, or |
| * pDstPred. |
| * - pDstPred is not aligned on an 8-byte boundary. |
| * - iPredStep0 <= 0 or iPredStep0 is not a multiple of 8. |
| * - iPredStep1 <= 0 or iPredStep1 is not a multiple of 8. |
| * - iDstStep <= 0 or iDstStep is not a multiple of 8. |
| * - iHeight is not 4, 8, or 16. |
| * |
| */ |
| OMXResult omxVCCOMM_Average_8x ( |
| const OMX_U8* pPred0, |
| const OMX_U8* pPred1, |
| OMX_U32 iPredStep0, |
| OMX_U32 iPredStep1, |
| OMX_U8* pDstPred, |
| OMX_U32 iDstStep, |
| OMX_U32 iHeight |
| ) |
| { |
| /* check for argument error */ |
| armRetArgErrIf(pPred0 == NULL, OMX_Sts_BadArgErr) |
| armRetArgErrIf(pPred1 == NULL, OMX_Sts_BadArgErr) |
| armRetArgErrIf(pDstPred == NULL, OMX_Sts_BadArgErr) |
| armRetArgErrIf((iPredStep0 == 0) || (iPredStep0 & 7), OMX_Sts_BadArgErr) |
| armRetArgErrIf((iPredStep1 == 0) || (iPredStep1 & 7), OMX_Sts_BadArgErr) |
| armRetArgErrIf((iDstStep == 0) || (iDstStep & 7), OMX_Sts_BadArgErr) |
| armRetArgErrIf((iHeight != 4) && (iHeight != 8) && (iHeight != 16), OMX_Sts_BadArgErr) |
| armRetArgErrIf(armNot8ByteAligned(pDstPred), OMX_Sts_BadArgErr) |
| |
| return armVCCOMM_Average |
| (pPred0, pPred1, iPredStep0, iPredStep1, pDstPred, iDstStep, 8, iHeight); |
| } |
| |
| |
| /***************************************************************************** |
| * END OF FILE |
| *****************************************************************************/ |
| |
