10c1bc742181ded4930842b46e9507372f0b1b963James Dong/** 20c1bc742181ded4930842b46e9507372f0b1b963James Dong * 30c1bc742181ded4930842b46e9507372f0b1b963James Dong * File Name: armVCM4P10_InterpolateHalfVer_Luma.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 functions will help to calculate Half Pel luma interpolation 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: armVCM4P10_InterpolateHalfVer_Luma 250c1bc742181ded4930842b46e9507372f0b1b963James Dong * 260c1bc742181ded4930842b46e9507372f0b1b963James Dong * Description: 270c1bc742181ded4930842b46e9507372f0b1b963James Dong * This function performs interpolation for vertical 1/2-pel positions 280c1bc742181ded4930842b46e9507372f0b1b963James Dong * around a full-pel position. 290c1bc742181ded4930842b46e9507372f0b1b963James Dong * 300c1bc742181ded4930842b46e9507372f0b1b963James Dong * Remarks: 310c1bc742181ded4930842b46e9507372f0b1b963James Dong * 320c1bc742181ded4930842b46e9507372f0b1b963James Dong * [in] pSrc Pointer to top-left corner of block used to interpolate 330c1bc742181ded4930842b46e9507372f0b1b963James Dong * in the reconstructed frame plane 340c1bc742181ded4930842b46e9507372f0b1b963James Dong * [in] iSrcStep Step of the source buffer. 350c1bc742181ded4930842b46e9507372f0b1b963James Dong * [in] iDstStep Step of the destination(interpolation) buffer. 360c1bc742181ded4930842b46e9507372f0b1b963James Dong * [in] iWidth Width of the current block 370c1bc742181ded4930842b46e9507372f0b1b963James Dong * [in] iHeight Height of the current block 380c1bc742181ded4930842b46e9507372f0b1b963James Dong * [out] pDst Pointer to the interpolation buffer of the 1/2-pel 390c1bc742181ded4930842b46e9507372f0b1b963James Dong * 400c1bc742181ded4930842b46e9507372f0b1b963James Dong * Return Value: 410c1bc742181ded4930842b46e9507372f0b1b963James Dong * Standard OMXResult value. 420c1bc742181ded4930842b46e9507372f0b1b963James Dong * 430c1bc742181ded4930842b46e9507372f0b1b963James Dong */ 440c1bc742181ded4930842b46e9507372f0b1b963James Dong 450c1bc742181ded4930842b46e9507372f0b1b963James DongOMXResult armVCM4P10_InterpolateHalfVer_Luma( 460c1bc742181ded4930842b46e9507372f0b1b963James Dong const OMX_U8* pSrc, 470c1bc742181ded4930842b46e9507372f0b1b963James Dong OMX_U32 iSrcStep, 480c1bc742181ded4930842b46e9507372f0b1b963James Dong OMX_U8* pDst, 490c1bc742181ded4930842b46e9507372f0b1b963James Dong OMX_U32 iDstStep, 500c1bc742181ded4930842b46e9507372f0b1b963James Dong OMX_U32 iWidth, 510c1bc742181ded4930842b46e9507372f0b1b963James Dong OMX_U32 iHeight 520c1bc742181ded4930842b46e9507372f0b1b963James Dong) 530c1bc742181ded4930842b46e9507372f0b1b963James Dong{ 540c1bc742181ded4930842b46e9507372f0b1b963James Dong OMX_S32 HalfCoeff, pos; 550c1bc742181ded4930842b46e9507372f0b1b963James Dong OMX_INT y, x; 560c1bc742181ded4930842b46e9507372f0b1b963James Dong 570c1bc742181ded4930842b46e9507372f0b1b963James Dong /* check for argument error */ 580c1bc742181ded4930842b46e9507372f0b1b963James Dong armRetArgErrIf(pSrc == NULL, OMX_Sts_BadArgErr) 590c1bc742181ded4930842b46e9507372f0b1b963James Dong armRetArgErrIf(pDst == NULL, OMX_Sts_BadArgErr) 600c1bc742181ded4930842b46e9507372f0b1b963James Dong 610c1bc742181ded4930842b46e9507372f0b1b963James Dong 620c1bc742181ded4930842b46e9507372f0b1b963James Dong for (y = 0; y < iHeight; y++) 630c1bc742181ded4930842b46e9507372f0b1b963James Dong { 640c1bc742181ded4930842b46e9507372f0b1b963James Dong for (x = 0; x < iWidth; x++) 650c1bc742181ded4930842b46e9507372f0b1b963James Dong { 660c1bc742181ded4930842b46e9507372f0b1b963James Dong pos = y * iSrcStep + x; 670c1bc742181ded4930842b46e9507372f0b1b963James Dong HalfCoeff = 680c1bc742181ded4930842b46e9507372f0b1b963James Dong pSrc [pos - 2 * iSrcStep] - 690c1bc742181ded4930842b46e9507372f0b1b963James Dong 5 * pSrc [pos - 1 * iSrcStep] + 700c1bc742181ded4930842b46e9507372f0b1b963James Dong 20 * pSrc [pos] + 710c1bc742181ded4930842b46e9507372f0b1b963James Dong 20 * pSrc [pos + 1 * iSrcStep] - 720c1bc742181ded4930842b46e9507372f0b1b963James Dong 5 * pSrc [pos + 2 * iSrcStep] + 730c1bc742181ded4930842b46e9507372f0b1b963James Dong pSrc [pos + 3 * iSrcStep]; 740c1bc742181ded4930842b46e9507372f0b1b963James Dong 750c1bc742181ded4930842b46e9507372f0b1b963James Dong HalfCoeff = (HalfCoeff + 16) >> 5; 760c1bc742181ded4930842b46e9507372f0b1b963James Dong HalfCoeff = armClip(0, 255, HalfCoeff); 770c1bc742181ded4930842b46e9507372f0b1b963James Dong 780c1bc742181ded4930842b46e9507372f0b1b963James Dong pDst [y * iDstStep + x] = (OMX_U8) HalfCoeff; 790c1bc742181ded4930842b46e9507372f0b1b963James Dong } 800c1bc742181ded4930842b46e9507372f0b1b963James Dong } 810c1bc742181ded4930842b46e9507372f0b1b963James Dong 820c1bc742181ded4930842b46e9507372f0b1b963James Dong return OMX_Sts_NoErr; 830c1bc742181ded4930842b46e9507372f0b1b963James Dong} 840c1bc742181ded4930842b46e9507372f0b1b963James Dong 85