10c1bc742181ded4930842b46e9507372f0b1b963James Dong/** 20c1bc742181ded4930842b46e9507372f0b1b963James Dong * 30c1bc742181ded4930842b46e9507372f0b1b963James Dong * File Name: omxVCCOMM_Average_8x.c 40c1bc742181ded4930842b46e9507372f0b1b963James Dong * OpenMAX DL: v1.0.2 50c1bc742181ded4930842b46e9507372f0b1b963James Dong * Revision: 9641 60c1bc742181ded4930842b46e9507372f0b1b963James Dong * Date: Thursday, February 7, 2008 70c1bc742181ded4930842b46e9507372f0b1b963James Dong * 80c1bc742181ded4930842b46e9507372f0b1b963James Dong * (c) Copyright 2007-2008 ARM Limited. All Rights Reserved. 90c1bc742181ded4930842b46e9507372f0b1b963James Dong * 100c1bc742181ded4930842b46e9507372f0b1b963James Dong * 110c1bc742181ded4930842b46e9507372f0b1b963James Dong * Description: 120c1bc742181ded4930842b46e9507372f0b1b963James Dong * This function will calculate Average of two 8x4 or 8x8 or 8x16 blocks 130c1bc742181ded4930842b46e9507372f0b1b963James Dong * 140c1bc742181ded4930842b46e9507372f0b1b963James Dong */ 150c1bc742181ded4930842b46e9507372f0b1b963James Dong 160c1bc742181ded4930842b46e9507372f0b1b963James Dong#include "omxtypes.h" 170c1bc742181ded4930842b46e9507372f0b1b963James Dong#include "armOMX.h" 180c1bc742181ded4930842b46e9507372f0b1b963James Dong#include "omxVC.h" 190c1bc742181ded4930842b46e9507372f0b1b963James Dong 200c1bc742181ded4930842b46e9507372f0b1b963James Dong#include "armCOMM.h" 210c1bc742181ded4930842b46e9507372f0b1b963James Dong#include "armVC.h" 220c1bc742181ded4930842b46e9507372f0b1b963James Dong 230c1bc742181ded4930842b46e9507372f0b1b963James Dong/** 240c1bc742181ded4930842b46e9507372f0b1b963James Dong * Function: omxVCCOMM_Average_8x (6.1.3.1.1) 250c1bc742181ded4930842b46e9507372f0b1b963James Dong * 260c1bc742181ded4930842b46e9507372f0b1b963James Dong * Description: 270c1bc742181ded4930842b46e9507372f0b1b963James Dong * This function calculates the average of two 8x4, 8x8, or 8x16 blocks. The 280c1bc742181ded4930842b46e9507372f0b1b963James Dong * result is rounded according to (a+b+1)/2. The block average function can 290c1bc742181ded4930842b46e9507372f0b1b963James Dong * be used in conjunction with half-pixel interpolation to obtain quarter 300c1bc742181ded4930842b46e9507372f0b1b963James Dong * pixel motion estimates, as described in [ISO14496-10], subclause 8.4.2.2.1. 310c1bc742181ded4930842b46e9507372f0b1b963James Dong * 320c1bc742181ded4930842b46e9507372f0b1b963James Dong * Input Arguments: 330c1bc742181ded4930842b46e9507372f0b1b963James Dong * 340c1bc742181ded4930842b46e9507372f0b1b963James Dong * pPred0 - Pointer to the top-left corner of reference block 0 350c1bc742181ded4930842b46e9507372f0b1b963James Dong * pPred1 - Pointer to the top-left corner of reference block 1 360c1bc742181ded4930842b46e9507372f0b1b963James Dong * iPredStep0 - Step of reference block 0 370c1bc742181ded4930842b46e9507372f0b1b963James Dong * iPredStep1 - Step of reference block 1 380c1bc742181ded4930842b46e9507372f0b1b963James Dong * iDstStep - Step of the destination buffer. 390c1bc742181ded4930842b46e9507372f0b1b963James Dong * iHeight - Height of the blocks 400c1bc742181ded4930842b46e9507372f0b1b963James Dong * 410c1bc742181ded4930842b46e9507372f0b1b963James Dong * Output Arguments: 420c1bc742181ded4930842b46e9507372f0b1b963James Dong * 430c1bc742181ded4930842b46e9507372f0b1b963James Dong * pDstPred - Pointer to the destination buffer. 8-byte aligned. 440c1bc742181ded4930842b46e9507372f0b1b963James Dong * 450c1bc742181ded4930842b46e9507372f0b1b963James Dong * Return Value: 460c1bc742181ded4930842b46e9507372f0b1b963James Dong * 470c1bc742181ded4930842b46e9507372f0b1b963James Dong * OMX_Sts_NoErr - no error 480c1bc742181ded4930842b46e9507372f0b1b963James Dong * OMX_Sts_BadArgErr - bad arguments; returned under any of the following 490c1bc742181ded4930842b46e9507372f0b1b963James Dong * conditions: 500c1bc742181ded4930842b46e9507372f0b1b963James Dong * - one or more of the following pointers is NULL: pPred0, pPred1, or 510c1bc742181ded4930842b46e9507372f0b1b963James Dong * pDstPred. 520c1bc742181ded4930842b46e9507372f0b1b963James Dong * - pDstPred is not aligned on an 8-byte boundary. 530c1bc742181ded4930842b46e9507372f0b1b963James Dong * - iPredStep0 <= 0 or iPredStep0 is not a multiple of 8. 540c1bc742181ded4930842b46e9507372f0b1b963James Dong * - iPredStep1 <= 0 or iPredStep1 is not a multiple of 8. 550c1bc742181ded4930842b46e9507372f0b1b963James Dong * - iDstStep <= 0 or iDstStep is not a multiple of 8. 560c1bc742181ded4930842b46e9507372f0b1b963James Dong * - iHeight is not 4, 8, or 16. 570c1bc742181ded4930842b46e9507372f0b1b963James Dong * 580c1bc742181ded4930842b46e9507372f0b1b963James Dong */ 590c1bc742181ded4930842b46e9507372f0b1b963James Dong OMXResult omxVCCOMM_Average_8x ( 600c1bc742181ded4930842b46e9507372f0b1b963James Dong const OMX_U8* pPred0, 610c1bc742181ded4930842b46e9507372f0b1b963James Dong const OMX_U8* pPred1, 620c1bc742181ded4930842b46e9507372f0b1b963James Dong OMX_U32 iPredStep0, 630c1bc742181ded4930842b46e9507372f0b1b963James Dong OMX_U32 iPredStep1, 640c1bc742181ded4930842b46e9507372f0b1b963James Dong OMX_U8* pDstPred, 650c1bc742181ded4930842b46e9507372f0b1b963James Dong OMX_U32 iDstStep, 660c1bc742181ded4930842b46e9507372f0b1b963James Dong OMX_U32 iHeight 670c1bc742181ded4930842b46e9507372f0b1b963James Dong) 680c1bc742181ded4930842b46e9507372f0b1b963James Dong{ 690c1bc742181ded4930842b46e9507372f0b1b963James Dong /* check for argument error */ 700c1bc742181ded4930842b46e9507372f0b1b963James Dong armRetArgErrIf(pPred0 == NULL, OMX_Sts_BadArgErr) 710c1bc742181ded4930842b46e9507372f0b1b963James Dong armRetArgErrIf(pPred1 == NULL, OMX_Sts_BadArgErr) 720c1bc742181ded4930842b46e9507372f0b1b963James Dong armRetArgErrIf(pDstPred == NULL, OMX_Sts_BadArgErr) 730c1bc742181ded4930842b46e9507372f0b1b963James Dong armRetArgErrIf((iPredStep0 == 0) || (iPredStep0 & 7), OMX_Sts_BadArgErr) 740c1bc742181ded4930842b46e9507372f0b1b963James Dong armRetArgErrIf((iPredStep1 == 0) || (iPredStep1 & 7), OMX_Sts_BadArgErr) 750c1bc742181ded4930842b46e9507372f0b1b963James Dong armRetArgErrIf((iDstStep == 0) || (iDstStep & 7), OMX_Sts_BadArgErr) 760c1bc742181ded4930842b46e9507372f0b1b963James Dong armRetArgErrIf((iHeight != 4) && (iHeight != 8) && (iHeight != 16), OMX_Sts_BadArgErr) 770c1bc742181ded4930842b46e9507372f0b1b963James Dong armRetArgErrIf(armNot8ByteAligned(pDstPred), OMX_Sts_BadArgErr) 780c1bc742181ded4930842b46e9507372f0b1b963James Dong 790c1bc742181ded4930842b46e9507372f0b1b963James Dong return armVCCOMM_Average 800c1bc742181ded4930842b46e9507372f0b1b963James Dong (pPred0, pPred1, iPredStep0, iPredStep1, pDstPred, iDstStep, 8, iHeight); 810c1bc742181ded4930842b46e9507372f0b1b963James Dong} 820c1bc742181ded4930842b46e9507372f0b1b963James Dong 830c1bc742181ded4930842b46e9507372f0b1b963James Dong 840c1bc742181ded4930842b46e9507372f0b1b963James Dong/***************************************************************************** 850c1bc742181ded4930842b46e9507372f0b1b963James Dong * END OF FILE 860c1bc742181ded4930842b46e9507372f0b1b963James Dong *****************************************************************************/ 870c1bc742181ded4930842b46e9507372f0b1b963James Dong 88