178e52bfac041d71ce53b5b13c2abf78af742b09dLajos Molnar/* 278e52bfac041d71ce53b5b13c2abf78af742b09dLajos Molnar * Copyright (C) 2007-2008 ARM Limited 378e52bfac041d71ce53b5b13c2abf78af742b09dLajos Molnar * 478e52bfac041d71ce53b5b13c2abf78af742b09dLajos Molnar * Licensed under the Apache License, Version 2.0 (the "License"); 578e52bfac041d71ce53b5b13c2abf78af742b09dLajos Molnar * you may not use this file except in compliance with the License. 678e52bfac041d71ce53b5b13c2abf78af742b09dLajos Molnar * You may obtain a copy of the License at 778e52bfac041d71ce53b5b13c2abf78af742b09dLajos Molnar * 878e52bfac041d71ce53b5b13c2abf78af742b09dLajos Molnar * http://www.apache.org/licenses/LICENSE-2.0 978e52bfac041d71ce53b5b13c2abf78af742b09dLajos Molnar * 1078e52bfac041d71ce53b5b13c2abf78af742b09dLajos Molnar * Unless required by applicable law or agreed to in writing, software 1178e52bfac041d71ce53b5b13c2abf78af742b09dLajos Molnar * distributed under the License is distributed on an "AS IS" BASIS, 1278e52bfac041d71ce53b5b13c2abf78af742b09dLajos Molnar * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 1378e52bfac041d71ce53b5b13c2abf78af742b09dLajos Molnar * See the License for the specific language governing permissions and 1478e52bfac041d71ce53b5b13c2abf78af742b09dLajos Molnar * limitations under the License. 1578e52bfac041d71ce53b5b13c2abf78af742b09dLajos Molnar * 1678e52bfac041d71ce53b5b13c2abf78af742b09dLajos Molnar */ 170c1bc742181ded4930842b46e9507372f0b1b963James Dong/** 180c1bc742181ded4930842b46e9507372f0b1b963James Dong * 190c1bc742181ded4930842b46e9507372f0b1b963James Dong * File Name: armVCM4P10_InterpolateHalfVer_Luma.c 200c1bc742181ded4930842b46e9507372f0b1b963James Dong * OpenMAX DL: v1.0.2 210c1bc742181ded4930842b46e9507372f0b1b963James Dong * Revision: 9641 220c1bc742181ded4930842b46e9507372f0b1b963James Dong * Date: Thursday, February 7, 2008 230c1bc742181ded4930842b46e9507372f0b1b963James Dong * 240c1bc742181ded4930842b46e9507372f0b1b963James Dong * 250c1bc742181ded4930842b46e9507372f0b1b963James Dong * 260c1bc742181ded4930842b46e9507372f0b1b963James Dong * Description: 270c1bc742181ded4930842b46e9507372f0b1b963James Dong * This functions will help to calculate Half Pel luma interpolation 280c1bc742181ded4930842b46e9507372f0b1b963James Dong * 290c1bc742181ded4930842b46e9507372f0b1b963James Dong */ 300c1bc742181ded4930842b46e9507372f0b1b963James Dong 310c1bc742181ded4930842b46e9507372f0b1b963James Dong#include "omxtypes.h" 320c1bc742181ded4930842b46e9507372f0b1b963James Dong#include "armOMX.h" 330c1bc742181ded4930842b46e9507372f0b1b963James Dong#include "omxVC.h" 340c1bc742181ded4930842b46e9507372f0b1b963James Dong 350c1bc742181ded4930842b46e9507372f0b1b963James Dong#include "armCOMM.h" 360c1bc742181ded4930842b46e9507372f0b1b963James Dong#include "armVC.h" 370c1bc742181ded4930842b46e9507372f0b1b963James Dong 380c1bc742181ded4930842b46e9507372f0b1b963James Dong/** 390c1bc742181ded4930842b46e9507372f0b1b963James Dong * Function: armVCM4P10_InterpolateHalfVer_Luma 400c1bc742181ded4930842b46e9507372f0b1b963James Dong * 410c1bc742181ded4930842b46e9507372f0b1b963James Dong * Description: 420c1bc742181ded4930842b46e9507372f0b1b963James Dong * This function performs interpolation for vertical 1/2-pel positions 430c1bc742181ded4930842b46e9507372f0b1b963James Dong * around a full-pel position. 440c1bc742181ded4930842b46e9507372f0b1b963James Dong * 450c1bc742181ded4930842b46e9507372f0b1b963James Dong * Remarks: 460c1bc742181ded4930842b46e9507372f0b1b963James Dong * 470c1bc742181ded4930842b46e9507372f0b1b963James Dong * [in] pSrc Pointer to top-left corner of block used to interpolate 480c1bc742181ded4930842b46e9507372f0b1b963James Dong * in the reconstructed frame plane 490c1bc742181ded4930842b46e9507372f0b1b963James Dong * [in] iSrcStep Step of the source buffer. 500c1bc742181ded4930842b46e9507372f0b1b963James Dong * [in] iDstStep Step of the destination(interpolation) buffer. 510c1bc742181ded4930842b46e9507372f0b1b963James Dong * [in] iWidth Width of the current block 520c1bc742181ded4930842b46e9507372f0b1b963James Dong * [in] iHeight Height of the current block 530c1bc742181ded4930842b46e9507372f0b1b963James Dong * [out] pDst Pointer to the interpolation buffer of the 1/2-pel 540c1bc742181ded4930842b46e9507372f0b1b963James Dong * 550c1bc742181ded4930842b46e9507372f0b1b963James Dong * Return Value: 560c1bc742181ded4930842b46e9507372f0b1b963James Dong * Standard OMXResult value. 570c1bc742181ded4930842b46e9507372f0b1b963James Dong * 580c1bc742181ded4930842b46e9507372f0b1b963James Dong */ 590c1bc742181ded4930842b46e9507372f0b1b963James Dong 600c1bc742181ded4930842b46e9507372f0b1b963James DongOMXResult armVCM4P10_InterpolateHalfVer_Luma( 610c1bc742181ded4930842b46e9507372f0b1b963James Dong const OMX_U8* pSrc, 620c1bc742181ded4930842b46e9507372f0b1b963James Dong OMX_U32 iSrcStep, 630c1bc742181ded4930842b46e9507372f0b1b963James Dong OMX_U8* pDst, 640c1bc742181ded4930842b46e9507372f0b1b963James Dong OMX_U32 iDstStep, 650c1bc742181ded4930842b46e9507372f0b1b963James Dong OMX_U32 iWidth, 660c1bc742181ded4930842b46e9507372f0b1b963James Dong OMX_U32 iHeight 670c1bc742181ded4930842b46e9507372f0b1b963James Dong) 680c1bc742181ded4930842b46e9507372f0b1b963James Dong{ 690c1bc742181ded4930842b46e9507372f0b1b963James Dong OMX_S32 HalfCoeff, pos; 700c1bc742181ded4930842b46e9507372f0b1b963James Dong OMX_INT y, x; 710c1bc742181ded4930842b46e9507372f0b1b963James Dong 720c1bc742181ded4930842b46e9507372f0b1b963James Dong /* check for argument error */ 730c1bc742181ded4930842b46e9507372f0b1b963James Dong armRetArgErrIf(pSrc == NULL, OMX_Sts_BadArgErr) 740c1bc742181ded4930842b46e9507372f0b1b963James Dong armRetArgErrIf(pDst == NULL, OMX_Sts_BadArgErr) 750c1bc742181ded4930842b46e9507372f0b1b963James Dong 760c1bc742181ded4930842b46e9507372f0b1b963James Dong 770c1bc742181ded4930842b46e9507372f0b1b963James Dong for (y = 0; y < iHeight; y++) 780c1bc742181ded4930842b46e9507372f0b1b963James Dong { 790c1bc742181ded4930842b46e9507372f0b1b963James Dong for (x = 0; x < iWidth; x++) 800c1bc742181ded4930842b46e9507372f0b1b963James Dong { 810c1bc742181ded4930842b46e9507372f0b1b963James Dong pos = y * iSrcStep + x; 820c1bc742181ded4930842b46e9507372f0b1b963James Dong HalfCoeff = 830c1bc742181ded4930842b46e9507372f0b1b963James Dong pSrc [pos - 2 * iSrcStep] - 840c1bc742181ded4930842b46e9507372f0b1b963James Dong 5 * pSrc [pos - 1 * iSrcStep] + 850c1bc742181ded4930842b46e9507372f0b1b963James Dong 20 * pSrc [pos] + 860c1bc742181ded4930842b46e9507372f0b1b963James Dong 20 * pSrc [pos + 1 * iSrcStep] - 870c1bc742181ded4930842b46e9507372f0b1b963James Dong 5 * pSrc [pos + 2 * iSrcStep] + 880c1bc742181ded4930842b46e9507372f0b1b963James Dong pSrc [pos + 3 * iSrcStep]; 890c1bc742181ded4930842b46e9507372f0b1b963James Dong 900c1bc742181ded4930842b46e9507372f0b1b963James Dong HalfCoeff = (HalfCoeff + 16) >> 5; 910c1bc742181ded4930842b46e9507372f0b1b963James Dong HalfCoeff = armClip(0, 255, HalfCoeff); 920c1bc742181ded4930842b46e9507372f0b1b963James Dong 930c1bc742181ded4930842b46e9507372f0b1b963James Dong pDst [y * iDstStep + x] = (OMX_U8) HalfCoeff; 940c1bc742181ded4930842b46e9507372f0b1b963James Dong } 950c1bc742181ded4930842b46e9507372f0b1b963James Dong } 960c1bc742181ded4930842b46e9507372f0b1b963James Dong 970c1bc742181ded4930842b46e9507372f0b1b963James Dong return OMX_Sts_NoErr; 980c1bc742181ded4930842b46e9507372f0b1b963James Dong} 990c1bc742181ded4930842b46e9507372f0b1b963James Dong 100