| /** |
| * |
| * File Name: omxVCM4P2_BlockMatch_Half_16x16.c |
| * OpenMAX DL: v1.0.2 |
| * Revision: 9641 |
| * Date: Thursday, February 7, 2008 |
| * |
| * (c) Copyright 2007-2008 ARM Limited. All Rights Reserved. |
| * |
| * |
| * |
| * Description: |
| * Contains modules for Block matching, a full search algorithm |
| * is implemented |
| * |
| */ |
| |
| #include "omxtypes.h" |
| #include "armOMX.h" |
| #include "omxVC.h" |
| |
| #include "armVC.h" |
| #include "armCOMM.h" |
| |
| /** |
| * Function: omxVCM4P2_BlockMatch_Half_16x16 (6.2.4.2.3) |
| * |
| * Description: |
| * Performs a 16x16 block match with half-pixel resolution. Returns the |
| * estimated motion vector and associated minimum SAD. This function |
| * estimates the half-pixel motion vector by interpolating the integer |
| * resolution motion vector referenced by the input parameter pSrcDstMV, i.e., |
| * the initial integer MV is generated externally. The input parameters |
| * pSrcRefBuf and pSearchPointRefPos should be shifted by the winning MV of |
| * 16x16 integer search prior to calling BlockMatch_Half_16x16. The function |
| * BlockMatch_Integer_16x16 may be used for integer motion estimation. |
| * |
| * Input Arguments: |
| * |
| * pSrcRefBuf - pointer to the reference Y plane; points to the reference |
| * macroblock that corresponds to the location of the current |
| * macroblock in the current plane. |
| * refWidth - width of the reference plane |
| * pRefRect - reference plane valid region rectangle |
| * pSrcCurrBuf - pointer to the current block in the current macroblock |
| * buffer extracted from the original plane (linear array, 256 |
| * entries); must be aligned on a 16-byte boundary. The number of |
| * bytes between lines (step) is 16. |
| * pSearchPointRefPos - position of the starting point for half pixel |
| * search (specified in terms of integer pixel units) in the |
| * reference plane, i.e., the reference position pointed to by the |
| * predicted motion vector. |
| * rndVal - rounding control parameter: 0 - disabled; 1 - enabled. |
| * pSrcDstMV - pointer to the initial MV estimate; typically generated |
| * during a prior 16X16 integer search; specified in terms of |
| * half-pixel units. |
| * |
| * Output Arguments: |
| * |
| * pSrcDstMV - pointer to estimated MV |
| * pDstSAD - pointer to minimum SAD |
| * |
| * Return Value: |
| * |
| * OMX_Sts_NoErr - no error |
| * OMX_Sts_BadArgErr - bad arguments. Returned if one of the following |
| * conditions is true: |
| * - at least one of the following pointers is NULL: pSrcRefBuf, |
| * pRefRect, pSrcCurrBuff, pSearchPointRefPos, pSrcDstMV. |
| * - pSrcCurrBuf is not 16-byte aligned, or |
| * |
| */ |
| |
| OMXResult omxVCM4P2_BlockMatch_Half_16x16( |
| const OMX_U8 *pSrcRefBuf, |
| OMX_INT refWidth, |
| const OMXRect *pRefRect, |
| const OMX_U8 *pSrcCurrBuf, |
| const OMXVCM4P2Coordinate *pSearchPointRefPos, |
| OMX_INT rndVal, |
| OMXVCMotionVector *pSrcDstMV, |
| OMX_INT *pDstSAD |
| ) |
| { |
| |
| /* For a blocksize of 16x16 */ |
| OMX_U8 BlockSize = 16; |
| |
| /* Argument error checks */ |
| armRetArgErrIf(pSrcRefBuf == NULL, OMX_Sts_BadArgErr); |
| armRetArgErrIf(pRefRect == NULL, OMX_Sts_BadArgErr); |
| armRetArgErrIf(pSrcCurrBuf == NULL, OMX_Sts_BadArgErr); |
| armRetArgErrIf(pSearchPointRefPos == NULL, OMX_Sts_BadArgErr); |
| armRetArgErrIf(pSrcDstMV == NULL, OMX_Sts_BadArgErr); |
| armRetArgErrIf(!armIs16ByteAligned(pSrcCurrBuf), OMX_Sts_BadArgErr); |
| |
| return (armVCM4P2_BlockMatch_Half( |
| pSrcRefBuf, |
| refWidth, |
| pRefRect, |
| pSrcCurrBuf, |
| pSearchPointRefPos, |
| rndVal, |
| pSrcDstMV, |
| pDstSAD, |
| BlockSize)); |
| |
| |
| } |
| |
| /* End of file */ |