omxVCM4P10_TransformDequantLumaDCFromPair.c revision 0c1bc742181ded4930842b46e9507372f0b1b963
10c1bc742181ded4930842b46e9507372f0b1b963James Dong/* ---------------------------------------------------------------- 20c1bc742181ded4930842b46e9507372f0b1b963James Dong * 30c1bc742181ded4930842b46e9507372f0b1b963James Dong * 40c1bc742181ded4930842b46e9507372f0b1b963James Dong * File Name: omxVCM4P10_TransformDequantLumaDCFromPair.c 50c1bc742181ded4930842b46e9507372f0b1b963James Dong * OpenMAX DL: v1.0.2 60c1bc742181ded4930842b46e9507372f0b1b963James Dong * Revision: 9641 70c1bc742181ded4930842b46e9507372f0b1b963James Dong * Date: Thursday, February 7, 2008 80c1bc742181ded4930842b46e9507372f0b1b963James Dong * 90c1bc742181ded4930842b46e9507372f0b1b963James Dong * (c) Copyright 2007-2008 ARM Limited. All Rights Reserved. 100c1bc742181ded4930842b46e9507372f0b1b963James Dong * 110c1bc742181ded4930842b46e9507372f0b1b963James Dong * 120c1bc742181ded4930842b46e9507372f0b1b963James Dong * 130c1bc742181ded4930842b46e9507372f0b1b963James Dong * H.264 inverse quantize and transform module 140c1bc742181ded4930842b46e9507372f0b1b963James Dong * 150c1bc742181ded4930842b46e9507372f0b1b963James Dong */ 160c1bc742181ded4930842b46e9507372f0b1b963James Dong 170c1bc742181ded4930842b46e9507372f0b1b963James Dong#include "omxtypes.h" 180c1bc742181ded4930842b46e9507372f0b1b963James Dong#include "armOMX.h" 190c1bc742181ded4930842b46e9507372f0b1b963James Dong#include "omxVC.h" 200c1bc742181ded4930842b46e9507372f0b1b963James Dong 210c1bc742181ded4930842b46e9507372f0b1b963James Dong#include "armCOMM.h" 220c1bc742181ded4930842b46e9507372f0b1b963James Dong#include "armVC.h" 230c1bc742181ded4930842b46e9507372f0b1b963James Dong 240c1bc742181ded4930842b46e9507372f0b1b963James Dong/* 250c1bc742181ded4930842b46e9507372f0b1b963James Dong * Description: 260c1bc742181ded4930842b46e9507372f0b1b963James Dong * Dequantize Luma DC block 270c1bc742181ded4930842b46e9507372f0b1b963James Dong */ 280c1bc742181ded4930842b46e9507372f0b1b963James Dong 290c1bc742181ded4930842b46e9507372f0b1b963James Dongstatic void DequantLumaDC4x4( 300c1bc742181ded4930842b46e9507372f0b1b963James Dong OMX_S16* pDst, 310c1bc742181ded4930842b46e9507372f0b1b963James Dong OMX_INT QP 320c1bc742181ded4930842b46e9507372f0b1b963James Dong) 330c1bc742181ded4930842b46e9507372f0b1b963James Dong{ 340c1bc742181ded4930842b46e9507372f0b1b963James Dong int Shift = (QP/6)-2 ; 350c1bc742181ded4930842b46e9507372f0b1b963James Dong int Scale = armVCM4P10_VMatrix[QP%6][0]; 360c1bc742181ded4930842b46e9507372f0b1b963James Dong int i, Round, Value; 370c1bc742181ded4930842b46e9507372f0b1b963James Dong 380c1bc742181ded4930842b46e9507372f0b1b963James Dong if (Shift >= 0) 390c1bc742181ded4930842b46e9507372f0b1b963James Dong { 400c1bc742181ded4930842b46e9507372f0b1b963James Dong for (i=0; i<16; i++) 410c1bc742181ded4930842b46e9507372f0b1b963James Dong { 420c1bc742181ded4930842b46e9507372f0b1b963James Dong Value = (pDst[i] * Scale) << Shift; 430c1bc742181ded4930842b46e9507372f0b1b963James Dong pDst[i] = (OMX_S16)Value; 440c1bc742181ded4930842b46e9507372f0b1b963James Dong } 450c1bc742181ded4930842b46e9507372f0b1b963James Dong } 460c1bc742181ded4930842b46e9507372f0b1b963James Dong else 470c1bc742181ded4930842b46e9507372f0b1b963James Dong { 480c1bc742181ded4930842b46e9507372f0b1b963James Dong Shift = -Shift;; 490c1bc742181ded4930842b46e9507372f0b1b963James Dong Round = 1<<(Shift-1); 500c1bc742181ded4930842b46e9507372f0b1b963James Dong 510c1bc742181ded4930842b46e9507372f0b1b963James Dong for (i=0; i<16; i++) 520c1bc742181ded4930842b46e9507372f0b1b963James Dong { 530c1bc742181ded4930842b46e9507372f0b1b963James Dong Value = (pDst[i] * Scale + Round) >> Shift; 540c1bc742181ded4930842b46e9507372f0b1b963James Dong pDst[i] = (OMX_S16)Value; 550c1bc742181ded4930842b46e9507372f0b1b963James Dong } 560c1bc742181ded4930842b46e9507372f0b1b963James Dong } 570c1bc742181ded4930842b46e9507372f0b1b963James Dong} 580c1bc742181ded4930842b46e9507372f0b1b963James Dong 590c1bc742181ded4930842b46e9507372f0b1b963James Dong 600c1bc742181ded4930842b46e9507372f0b1b963James Dong 610c1bc742181ded4930842b46e9507372f0b1b963James Dong/* 620c1bc742181ded4930842b46e9507372f0b1b963James Dong * Description: 630c1bc742181ded4930842b46e9507372f0b1b963James Dong * Inverse Transform DC 4x4 Coefficients 640c1bc742181ded4930842b46e9507372f0b1b963James Dong */ 650c1bc742181ded4930842b46e9507372f0b1b963James Dongstatic void InvTransformDC4x4(OMX_S16* pData) 660c1bc742181ded4930842b46e9507372f0b1b963James Dong{ 670c1bc742181ded4930842b46e9507372f0b1b963James Dong int i; 680c1bc742181ded4930842b46e9507372f0b1b963James Dong 690c1bc742181ded4930842b46e9507372f0b1b963James Dong /* Transform rows */ 700c1bc742181ded4930842b46e9507372f0b1b963James Dong for (i=0; i<16; i+=4) 710c1bc742181ded4930842b46e9507372f0b1b963James Dong { 720c1bc742181ded4930842b46e9507372f0b1b963James Dong int c0 = pData[i+0]; 730c1bc742181ded4930842b46e9507372f0b1b963James Dong int c1 = pData[i+1]; 740c1bc742181ded4930842b46e9507372f0b1b963James Dong int c2 = pData[i+2]; 750c1bc742181ded4930842b46e9507372f0b1b963James Dong int c3 = pData[i+3]; 760c1bc742181ded4930842b46e9507372f0b1b963James Dong pData[i+0] = (OMX_S16)(c0+c1+c2+c3); 770c1bc742181ded4930842b46e9507372f0b1b963James Dong pData[i+1] = (OMX_S16)(c0+c1-c2-c3); 780c1bc742181ded4930842b46e9507372f0b1b963James Dong pData[i+2] = (OMX_S16)(c0-c1-c2+c3); 790c1bc742181ded4930842b46e9507372f0b1b963James Dong pData[i+3] = (OMX_S16)(c0-c1+c2-c3); 800c1bc742181ded4930842b46e9507372f0b1b963James Dong } 810c1bc742181ded4930842b46e9507372f0b1b963James Dong 820c1bc742181ded4930842b46e9507372f0b1b963James Dong /* Transform columns */ 830c1bc742181ded4930842b46e9507372f0b1b963James Dong for (i=0; i<4; i++) 840c1bc742181ded4930842b46e9507372f0b1b963James Dong { 850c1bc742181ded4930842b46e9507372f0b1b963James Dong int c0 = pData[i+0]; 860c1bc742181ded4930842b46e9507372f0b1b963James Dong int c1 = pData[i+4]; 870c1bc742181ded4930842b46e9507372f0b1b963James Dong int c2 = pData[i+8]; 880c1bc742181ded4930842b46e9507372f0b1b963James Dong int c3 = pData[i+12]; 890c1bc742181ded4930842b46e9507372f0b1b963James Dong pData[i+0] = (OMX_S16)(c0+c1+c2+c3); 900c1bc742181ded4930842b46e9507372f0b1b963James Dong pData[i+4] = (OMX_S16)(c0+c1-c2-c3); 910c1bc742181ded4930842b46e9507372f0b1b963James Dong pData[i+8] = (OMX_S16)(c0-c1-c2+c3); 920c1bc742181ded4930842b46e9507372f0b1b963James Dong pData[i+12] = (OMX_S16)(c0-c1+c2-c3); 930c1bc742181ded4930842b46e9507372f0b1b963James Dong } 940c1bc742181ded4930842b46e9507372f0b1b963James Dong} 950c1bc742181ded4930842b46e9507372f0b1b963James Dong 960c1bc742181ded4930842b46e9507372f0b1b963James Dong 970c1bc742181ded4930842b46e9507372f0b1b963James Dong/** 980c1bc742181ded4930842b46e9507372f0b1b963James Dong * Function: omxVCM4P10_TransformDequantLumaDCFromPair (6.3.4.2.1) 990c1bc742181ded4930842b46e9507372f0b1b963James Dong * 1000c1bc742181ded4930842b46e9507372f0b1b963James Dong * Description: 1010c1bc742181ded4930842b46e9507372f0b1b963James Dong * Reconstructs the 4x4 LumaDC block from the coefficient-position pair 1020c1bc742181ded4930842b46e9507372f0b1b963James Dong * buffer, performs integer inverse, and dequantization for 4x4 LumaDC 1030c1bc742181ded4930842b46e9507372f0b1b963James Dong * coefficients, and updates the pair buffer pointer to the next non-empty 1040c1bc742181ded4930842b46e9507372f0b1b963James Dong * block. 1050c1bc742181ded4930842b46e9507372f0b1b963James Dong * 1060c1bc742181ded4930842b46e9507372f0b1b963James Dong * Input Arguments: 1070c1bc742181ded4930842b46e9507372f0b1b963James Dong * 1080c1bc742181ded4930842b46e9507372f0b1b963James Dong * ppSrc - Double pointer to residual coefficient-position pair buffer 1090c1bc742181ded4930842b46e9507372f0b1b963James Dong * output by CALVC decoding 1100c1bc742181ded4930842b46e9507372f0b1b963James Dong * QP - Quantization parameter QpY 1110c1bc742181ded4930842b46e9507372f0b1b963James Dong * 1120c1bc742181ded4930842b46e9507372f0b1b963James Dong * Output Arguments: 1130c1bc742181ded4930842b46e9507372f0b1b963James Dong * 1140c1bc742181ded4930842b46e9507372f0b1b963James Dong * ppSrc - *ppSrc is updated to the start of next non empty block 1150c1bc742181ded4930842b46e9507372f0b1b963James Dong * pDst - Pointer to the reconstructed 4x4 LumaDC coefficients buffer; must 1160c1bc742181ded4930842b46e9507372f0b1b963James Dong * be aligned on a 8-byte boundary. 1170c1bc742181ded4930842b46e9507372f0b1b963James Dong * 1180c1bc742181ded4930842b46e9507372f0b1b963James Dong * Return Value: 1190c1bc742181ded4930842b46e9507372f0b1b963James Dong * OMX_Sts_NoErr, if the function runs without error. 1200c1bc742181ded4930842b46e9507372f0b1b963James Dong * OMX_Sts_BadArgErr - bad arguments: if one of the following cases occurs: 1210c1bc742181ded4930842b46e9507372f0b1b963James Dong * - ppSrc or pDst is NULL. 1220c1bc742181ded4930842b46e9507372f0b1b963James Dong * - pDst is not 8 byte aligned. 1230c1bc742181ded4930842b46e9507372f0b1b963James Dong * - QP is not in the range of [0-51]. 1240c1bc742181ded4930842b46e9507372f0b1b963James Dong * 1250c1bc742181ded4930842b46e9507372f0b1b963James Dong */ 1260c1bc742181ded4930842b46e9507372f0b1b963James Dong 1270c1bc742181ded4930842b46e9507372f0b1b963James DongOMXResult omxVCM4P10_TransformDequantLumaDCFromPair( 1280c1bc742181ded4930842b46e9507372f0b1b963James Dong const OMX_U8 **ppSrc, 1290c1bc742181ded4930842b46e9507372f0b1b963James Dong OMX_S16* pDst, 1300c1bc742181ded4930842b46e9507372f0b1b963James Dong OMX_INT QP 1310c1bc742181ded4930842b46e9507372f0b1b963James Dong ) 1320c1bc742181ded4930842b46e9507372f0b1b963James Dong{ 1330c1bc742181ded4930842b46e9507372f0b1b963James Dong armRetArgErrIf(ppSrc == NULL, OMX_Sts_BadArgErr); 1340c1bc742181ded4930842b46e9507372f0b1b963James Dong armRetArgErrIf(*ppSrc == NULL, OMX_Sts_BadArgErr); 1350c1bc742181ded4930842b46e9507372f0b1b963James Dong armRetArgErrIf(pDst == NULL, OMX_Sts_BadArgErr); 1360c1bc742181ded4930842b46e9507372f0b1b963James Dong armRetArgErrIf(armNot8ByteAligned(pDst), OMX_Sts_BadArgErr); 1370c1bc742181ded4930842b46e9507372f0b1b963James Dong armRetArgErrIf(QP<0, OMX_Sts_BadArgErr); 1380c1bc742181ded4930842b46e9507372f0b1b963James Dong armRetArgErrIf(QP>51, OMX_Sts_BadArgErr); 1390c1bc742181ded4930842b46e9507372f0b1b963James Dong 1400c1bc742181ded4930842b46e9507372f0b1b963James Dong armVCM4P10_UnpackBlock4x4(ppSrc, pDst); 1410c1bc742181ded4930842b46e9507372f0b1b963James Dong /*InvTransformDequantLumaDC4x4(pDst, QP);*/ 1420c1bc742181ded4930842b46e9507372f0b1b963James Dong InvTransformDC4x4(pDst); 1430c1bc742181ded4930842b46e9507372f0b1b963James Dong DequantLumaDC4x4(pDst, QP); 1440c1bc742181ded4930842b46e9507372f0b1b963James Dong 1450c1bc742181ded4930842b46e9507372f0b1b963James Dong return OMX_Sts_NoErr; 1460c1bc742181ded4930842b46e9507372f0b1b963James Dong} 1470c1bc742181ded4930842b46e9507372f0b1b963James Dong 1480c1bc742181ded4930842b46e9507372f0b1b963James Dong/* End of file */ 149