10c1bc742181ded4930842b46e9507372f0b1b963James Dong/** 20c1bc742181ded4930842b46e9507372f0b1b963James Dong * 30c1bc742181ded4930842b46e9507372f0b1b963James Dong * File Name: armVCM4P10_InterpolateHalfDiag_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/** 250c1bc742181ded4930842b46e9507372f0b1b963James Dong * Function: armVCM4P10_InterpolateHalfDiag_Luma 260c1bc742181ded4930842b46e9507372f0b1b963James Dong * 270c1bc742181ded4930842b46e9507372f0b1b963James Dong * Description: 280c1bc742181ded4930842b46e9507372f0b1b963James Dong * This function performs interpolation for (1/2, 1/2) positions 290c1bc742181ded4930842b46e9507372f0b1b963James Dong * around a full-pel position. 300c1bc742181ded4930842b46e9507372f0b1b963James Dong * 310c1bc742181ded4930842b46e9507372f0b1b963James Dong * Remarks: 320c1bc742181ded4930842b46e9507372f0b1b963James Dong * 330c1bc742181ded4930842b46e9507372f0b1b963James Dong * [in] pSrc Pointer to top-left corner of block used to interpolate 340c1bc742181ded4930842b46e9507372f0b1b963James Dong * in the reconstructed frame plane 350c1bc742181ded4930842b46e9507372f0b1b963James Dong * [in] iSrcStep Step of the source buffer. 360c1bc742181ded4930842b46e9507372f0b1b963James Dong * [in] iDstStep Step of the destination(interpolation) buffer. 370c1bc742181ded4930842b46e9507372f0b1b963James Dong * [in] iWidth Width of the current block 380c1bc742181ded4930842b46e9507372f0b1b963James Dong * [in] iHeight Height of the current block 390c1bc742181ded4930842b46e9507372f0b1b963James Dong * [out] pDst Pointer to the interpolation buffer of the (1/2,1/2)-pel 400c1bc742181ded4930842b46e9507372f0b1b963James Dong * 410c1bc742181ded4930842b46e9507372f0b1b963James Dong * Return Value: 420c1bc742181ded4930842b46e9507372f0b1b963James Dong * Standard OMXResult value. 430c1bc742181ded4930842b46e9507372f0b1b963James Dong * 440c1bc742181ded4930842b46e9507372f0b1b963James Dong */ 450c1bc742181ded4930842b46e9507372f0b1b963James Dong 460c1bc742181ded4930842b46e9507372f0b1b963James DongOMXResult armVCM4P10_InterpolateHalfDiag_Luma( 470c1bc742181ded4930842b46e9507372f0b1b963James Dong const OMX_U8* pSrc, 480c1bc742181ded4930842b46e9507372f0b1b963James Dong OMX_U32 iSrcStep, 490c1bc742181ded4930842b46e9507372f0b1b963James Dong OMX_U8* pDst, 500c1bc742181ded4930842b46e9507372f0b1b963James Dong OMX_U32 iDstStep, 510c1bc742181ded4930842b46e9507372f0b1b963James Dong OMX_U32 iWidth, 520c1bc742181ded4930842b46e9507372f0b1b963James Dong OMX_U32 iHeight 530c1bc742181ded4930842b46e9507372f0b1b963James Dong) 540c1bc742181ded4930842b46e9507372f0b1b963James Dong{ 550c1bc742181ded4930842b46e9507372f0b1b963James Dong OMX_S32 HalfCoeff, pos; 560c1bc742181ded4930842b46e9507372f0b1b963James Dong OMX_S16 Buf [21 * 16]; /* 21 rows by 16 pixels per row */ 570c1bc742181ded4930842b46e9507372f0b1b963James Dong OMX_U32 y, x; 580c1bc742181ded4930842b46e9507372f0b1b963James Dong 590c1bc742181ded4930842b46e9507372f0b1b963James Dong /* check for argument error */ 600c1bc742181ded4930842b46e9507372f0b1b963James Dong armRetArgErrIf(pSrc == NULL, OMX_Sts_BadArgErr) 610c1bc742181ded4930842b46e9507372f0b1b963James Dong armRetArgErrIf(pDst == NULL, OMX_Sts_BadArgErr) 620c1bc742181ded4930842b46e9507372f0b1b963James Dong 630c1bc742181ded4930842b46e9507372f0b1b963James Dong /* 640c1bc742181ded4930842b46e9507372f0b1b963James Dong * Intermediate values will be 1/2 pel at Horizontal direction 650c1bc742181ded4930842b46e9507372f0b1b963James Dong * Starting at (0.5, -2) at top extending to (0.5, height + 3) at bottom 660c1bc742181ded4930842b46e9507372f0b1b963James Dong * Buf contains a 2D array of size (iWidth)X(iHeight + 5) 670c1bc742181ded4930842b46e9507372f0b1b963James Dong */ 680c1bc742181ded4930842b46e9507372f0b1b963James Dong for (y = 0; y < iHeight + 5; y++) 690c1bc742181ded4930842b46e9507372f0b1b963James Dong { 700c1bc742181ded4930842b46e9507372f0b1b963James Dong for (x = 0; x < iWidth; x++) 710c1bc742181ded4930842b46e9507372f0b1b963James Dong { 720c1bc742181ded4930842b46e9507372f0b1b963James Dong pos = (y-2) * iSrcStep + x; 730c1bc742181ded4930842b46e9507372f0b1b963James Dong HalfCoeff = 740c1bc742181ded4930842b46e9507372f0b1b963James Dong pSrc [pos - 2] - 750c1bc742181ded4930842b46e9507372f0b1b963James Dong 5 * pSrc [pos - 1] + 760c1bc742181ded4930842b46e9507372f0b1b963James Dong 20 * pSrc [pos] + 770c1bc742181ded4930842b46e9507372f0b1b963James Dong 20 * pSrc [pos + 1] - 780c1bc742181ded4930842b46e9507372f0b1b963James Dong 5 * pSrc [pos + 2] + 790c1bc742181ded4930842b46e9507372f0b1b963James Dong pSrc [pos + 3]; 800c1bc742181ded4930842b46e9507372f0b1b963James Dong Buf [y * iWidth + x] = (OMX_S16)HalfCoeff; 810c1bc742181ded4930842b46e9507372f0b1b963James Dong } /* x */ 820c1bc742181ded4930842b46e9507372f0b1b963James Dong } /* y */ 830c1bc742181ded4930842b46e9507372f0b1b963James Dong 840c1bc742181ded4930842b46e9507372f0b1b963James Dong /* Vertical interpolate */ 850c1bc742181ded4930842b46e9507372f0b1b963James Dong for (y = 0; y < iHeight; y++) 860c1bc742181ded4930842b46e9507372f0b1b963James Dong { 870c1bc742181ded4930842b46e9507372f0b1b963James Dong for (x = 0; x < iWidth; x++) 880c1bc742181ded4930842b46e9507372f0b1b963James Dong { 890c1bc742181ded4930842b46e9507372f0b1b963James Dong pos = y * iWidth + x; 900c1bc742181ded4930842b46e9507372f0b1b963James Dong HalfCoeff = 910c1bc742181ded4930842b46e9507372f0b1b963James Dong Buf [pos] - 920c1bc742181ded4930842b46e9507372f0b1b963James Dong 5 * Buf [pos + 1 * iWidth] + 930c1bc742181ded4930842b46e9507372f0b1b963James Dong 20 * Buf [pos + 2 * iWidth] + 940c1bc742181ded4930842b46e9507372f0b1b963James Dong 20 * Buf [pos + 3 * iWidth] - 950c1bc742181ded4930842b46e9507372f0b1b963James Dong 5 * Buf [pos + 4 * iWidth] + 960c1bc742181ded4930842b46e9507372f0b1b963James Dong Buf [pos + 5 * iWidth]; 970c1bc742181ded4930842b46e9507372f0b1b963James Dong 980c1bc742181ded4930842b46e9507372f0b1b963James Dong HalfCoeff = (HalfCoeff + 512) >> 10; 990c1bc742181ded4930842b46e9507372f0b1b963James Dong HalfCoeff = armClip(0, 255, HalfCoeff); 1000c1bc742181ded4930842b46e9507372f0b1b963James Dong 1010c1bc742181ded4930842b46e9507372f0b1b963James Dong pDst [y * iDstStep + x] = (OMX_U8) HalfCoeff; 1020c1bc742181ded4930842b46e9507372f0b1b963James Dong } 1030c1bc742181ded4930842b46e9507372f0b1b963James Dong } 1040c1bc742181ded4930842b46e9507372f0b1b963James Dong 1050c1bc742181ded4930842b46e9507372f0b1b963James Dong return OMX_Sts_NoErr; 1060c1bc742181ded4930842b46e9507372f0b1b963James Dong} 107