| /** |
| * |
| * File Name: omxVCCOMM_ComputeTextureErrorBlock.c |
| * OpenMAX DL: v1.0.2 |
| * Revision: 9641 |
| * Date: Thursday, February 7, 2008 |
| * |
| * (c) Copyright 2007-2008 ARM Limited. All Rights Reserved. |
| * |
| * |
| * |
| * 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 (6.1.4.1.2) |
| * |
| * Description: |
| * Computes the texture error of the block. |
| * |
| * Input Arguments: |
| * |
| * pSrc - pointer to the source plane. This should be aligned on an 8-byte |
| * boundary. |
| * srcStep - step of the source plane |
| * pSrcRef - pointer to the reference buffer, an 8x8 block. This should be |
| * aligned on an 8-byte boundary. |
| * |
| * Output Arguments: |
| * |
| * pDst - pointer to the destination buffer, an 8x8 block. This should be |
| * aligned on an 8-byte boundary. |
| * |
| * Return Value: |
| * |
| * OMX_Sts_NoErr - no error |
| * OMX_Sts_BadArgErr - bad arguments: |
| * - At least one of the following pointers is NULL: |
| * pSrc, pSrcRef, pDst. |
| * - 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( |
| const OMX_U8 *pSrc, |
| OMX_INT srcStep, |
| const OMX_U8 *pSrcRef, |
| OMX_S16 * pDst |
| ) |
| { |
| |
| 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(!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; |
| y < 8; |
| y++, pSrc += srcStep) |
| { |
| for (x = 0; x < 8; x++, count++) |
| { |
| pDst[count] = pSrc[x] - pSrcRef[count]; |
| } |
| } |
| |
| return OMX_Sts_NoErr; |
| |
| } |
| |
| /* End of file */ |