1bebc99d6fa433c04139294a5057f8439d772dbd9James Dong/** 2bebc99d6fa433c04139294a5057f8439d772dbd9James Dong * 3bebc99d6fa433c04139294a5057f8439d772dbd9James Dong * File Name: omxVCM4P10_InvTransformDequant_LumaDC.c 4bebc99d6fa433c04139294a5057f8439d772dbd9James Dong * OpenMAX DL: v1.0.2 5bebc99d6fa433c04139294a5057f8439d772dbd9James Dong * Revision: 9641 6bebc99d6fa433c04139294a5057f8439d772dbd9James Dong * Date: Thursday, February 7, 2008 7bebc99d6fa433c04139294a5057f8439d772dbd9James Dong * 8bebc99d6fa433c04139294a5057f8439d772dbd9James Dong * (c) Copyright 2007-2008 ARM Limited. All Rights Reserved. 9bebc99d6fa433c04139294a5057f8439d772dbd9James Dong * 10bebc99d6fa433c04139294a5057f8439d772dbd9James Dong * 11bebc99d6fa433c04139294a5057f8439d772dbd9James Dong * Description: 12bebc99d6fa433c04139294a5057f8439d772dbd9James Dong * This function will calculate 4x4 hadamard transform of luma DC coefficients 13bebc99d6fa433c04139294a5057f8439d772dbd9James Dong * and quantization 14bebc99d6fa433c04139294a5057f8439d772dbd9James Dong * 15bebc99d6fa433c04139294a5057f8439d772dbd9James Dong */ 16bebc99d6fa433c04139294a5057f8439d772dbd9James Dong 17bebc99d6fa433c04139294a5057f8439d772dbd9James Dong#include "omxtypes.h" 18bebc99d6fa433c04139294a5057f8439d772dbd9James Dong#include "armOMX.h" 19bebc99d6fa433c04139294a5057f8439d772dbd9James Dong#include "omxVC.h" 20bebc99d6fa433c04139294a5057f8439d772dbd9James Dong 21bebc99d6fa433c04139294a5057f8439d772dbd9James Dong#include "armCOMM.h" 22bebc99d6fa433c04139294a5057f8439d772dbd9James Dong#include "armVC.h" 23bebc99d6fa433c04139294a5057f8439d772dbd9James Dong 24bebc99d6fa433c04139294a5057f8439d772dbd9James Dong/** 25bebc99d6fa433c04139294a5057f8439d772dbd9James Dong * Function: omxVCM4P10_InvTransformDequant_LumaDC (6.3.5.6.3) 26bebc99d6fa433c04139294a5057f8439d772dbd9James Dong * 27bebc99d6fa433c04139294a5057f8439d772dbd9James Dong * Description: 28bebc99d6fa433c04139294a5057f8439d772dbd9James Dong * This function performs inverse 4x4 Hadamard transform and then dequantizes 29bebc99d6fa433c04139294a5057f8439d772dbd9James Dong * the coefficients. 30bebc99d6fa433c04139294a5057f8439d772dbd9James Dong * 31bebc99d6fa433c04139294a5057f8439d772dbd9James Dong * Input Arguments: 32bebc99d6fa433c04139294a5057f8439d772dbd9James Dong * 33bebc99d6fa433c04139294a5057f8439d772dbd9James Dong * pSrc - Pointer to the 4x4 array of the 4x4 Hadamard-transformed and 34bebc99d6fa433c04139294a5057f8439d772dbd9James Dong * quantized coefficients. 16 byte alignment required. 35bebc99d6fa433c04139294a5057f8439d772dbd9James Dong * iQP - Quantization parameter; must be in the range [0,51]. 36bebc99d6fa433c04139294a5057f8439d772dbd9James Dong * 37bebc99d6fa433c04139294a5057f8439d772dbd9James Dong * Output Arguments: 38bebc99d6fa433c04139294a5057f8439d772dbd9James Dong * 39bebc99d6fa433c04139294a5057f8439d772dbd9James Dong * pDst - Pointer to inverse-transformed and dequantized coefficients. 40bebc99d6fa433c04139294a5057f8439d772dbd9James Dong * 16-byte alignment required. 41bebc99d6fa433c04139294a5057f8439d772dbd9James Dong * 42bebc99d6fa433c04139294a5057f8439d772dbd9James Dong * Return Value: 43bebc99d6fa433c04139294a5057f8439d772dbd9James Dong * 44bebc99d6fa433c04139294a5057f8439d772dbd9James Dong * OMX_Sts_NoErr - no error 45bebc99d6fa433c04139294a5057f8439d772dbd9James Dong * OMX_Sts_BadArgErr - bad arguments; returned if any of the following 46bebc99d6fa433c04139294a5057f8439d772dbd9James Dong * conditions are true: 47bebc99d6fa433c04139294a5057f8439d772dbd9James Dong * - at least one of the following pointers is NULL: pSrc 48bebc99d6fa433c04139294a5057f8439d772dbd9James Dong * - pSrc or pDst is not aligned on a 16-byte boundary 49bebc99d6fa433c04139294a5057f8439d772dbd9James Dong * 50bebc99d6fa433c04139294a5057f8439d772dbd9James Dong */ 51bebc99d6fa433c04139294a5057f8439d772dbd9James DongOMXResult omxVCM4P10_InvTransformDequant_LumaDC( 52bebc99d6fa433c04139294a5057f8439d772dbd9James Dong const OMX_S16* pSrc, 53bebc99d6fa433c04139294a5057f8439d772dbd9James Dong OMX_S16* pDst, 54bebc99d6fa433c04139294a5057f8439d772dbd9James Dong OMX_U32 iQP 55bebc99d6fa433c04139294a5057f8439d772dbd9James Dong) 56bebc99d6fa433c04139294a5057f8439d772dbd9James Dong{ 57bebc99d6fa433c04139294a5057f8439d772dbd9James Dong OMX_INT i, j; 58bebc99d6fa433c04139294a5057f8439d772dbd9James Dong OMX_S32 m1[4][4], m2[4][4], Value; 59bebc99d6fa433c04139294a5057f8439d772dbd9James Dong OMX_S32 QPer, V; 60bebc99d6fa433c04139294a5057f8439d772dbd9James Dong 61bebc99d6fa433c04139294a5057f8439d772dbd9James Dong /* check for argument error */ 62bebc99d6fa433c04139294a5057f8439d772dbd9James Dong armRetArgErrIf(pSrc == NULL, OMX_Sts_BadArgErr) 63bebc99d6fa433c04139294a5057f8439d772dbd9James Dong armRetArgErrIf(pDst == NULL, OMX_Sts_BadArgErr) 64bebc99d6fa433c04139294a5057f8439d772dbd9James Dong armRetArgErrIf(iQP > 51, OMX_Sts_BadArgErr) 65bebc99d6fa433c04139294a5057f8439d772dbd9James Dong armRetArgErrIf(armNot16ByteAligned(pSrc), OMX_Sts_BadArgErr) 66bebc99d6fa433c04139294a5057f8439d772dbd9James Dong armRetArgErrIf(armNot16ByteAligned(pDst), OMX_Sts_BadArgErr) 67bebc99d6fa433c04139294a5057f8439d772dbd9James Dong 68bebc99d6fa433c04139294a5057f8439d772dbd9James Dong /* Inv Hadamard Transform for DC Luma 4x4 block */ 69bebc99d6fa433c04139294a5057f8439d772dbd9James Dong /* Horizontal */ 70bebc99d6fa433c04139294a5057f8439d772dbd9James Dong for (i = 0; i < 4; i++) 71bebc99d6fa433c04139294a5057f8439d772dbd9James Dong { 72bebc99d6fa433c04139294a5057f8439d772dbd9James Dong j = i * 4; 73bebc99d6fa433c04139294a5057f8439d772dbd9James Dong 74bebc99d6fa433c04139294a5057f8439d772dbd9James Dong m1[i][0] = pSrc[j + 0] + pSrc[j + 2]; /* a+c */ 75bebc99d6fa433c04139294a5057f8439d772dbd9James Dong m1[i][1] = pSrc[j + 1] + pSrc[j + 3]; /* b+d */ 76bebc99d6fa433c04139294a5057f8439d772dbd9James Dong m1[i][2] = pSrc[j + 0] - pSrc[j + 2]; /* a-c */ 77bebc99d6fa433c04139294a5057f8439d772dbd9James Dong m1[i][3] = pSrc[j + 1] - pSrc[j + 3]; /* b-d */ 78bebc99d6fa433c04139294a5057f8439d772dbd9James Dong 79bebc99d6fa433c04139294a5057f8439d772dbd9James Dong m2[i][0] = m1[i][0] + m1[i][1]; /* a+b+c+d */ 80bebc99d6fa433c04139294a5057f8439d772dbd9James Dong m2[i][1] = m1[i][2] + m1[i][3]; /* a+b-c-d */ 81bebc99d6fa433c04139294a5057f8439d772dbd9James Dong m2[i][2] = m1[i][2] - m1[i][3]; /* a-b-c+d */ 82bebc99d6fa433c04139294a5057f8439d772dbd9James Dong m2[i][3] = m1[i][0] - m1[i][1]; /* a-b+c-d */ 83bebc99d6fa433c04139294a5057f8439d772dbd9James Dong 84bebc99d6fa433c04139294a5057f8439d772dbd9James Dong } 85bebc99d6fa433c04139294a5057f8439d772dbd9James Dong 86bebc99d6fa433c04139294a5057f8439d772dbd9James Dong /* Vertical */ 87bebc99d6fa433c04139294a5057f8439d772dbd9James Dong for (i = 0; i < 4; i++) 88bebc99d6fa433c04139294a5057f8439d772dbd9James Dong { 89bebc99d6fa433c04139294a5057f8439d772dbd9James Dong m1[0][i] = m2[0][i] + m2[2][i]; 90bebc99d6fa433c04139294a5057f8439d772dbd9James Dong m1[1][i] = m2[1][i] + m2[3][i]; 91bebc99d6fa433c04139294a5057f8439d772dbd9James Dong m1[2][i] = m2[0][i] - m2[2][i]; 92bebc99d6fa433c04139294a5057f8439d772dbd9James Dong m1[3][i] = m2[1][i] - m2[3][i]; 93bebc99d6fa433c04139294a5057f8439d772dbd9James Dong 94bebc99d6fa433c04139294a5057f8439d772dbd9James Dong m2[0][i] = m1[0][i] + m1[1][i]; 95bebc99d6fa433c04139294a5057f8439d772dbd9James Dong m2[1][i] = m1[2][i] + m1[3][i]; 96bebc99d6fa433c04139294a5057f8439d772dbd9James Dong m2[2][i] = m1[2][i] - m1[3][i]; 97bebc99d6fa433c04139294a5057f8439d772dbd9James Dong m2[3][i] = m1[0][i] - m1[1][i]; 98bebc99d6fa433c04139294a5057f8439d772dbd9James Dong } 99bebc99d6fa433c04139294a5057f8439d772dbd9James Dong 100bebc99d6fa433c04139294a5057f8439d772dbd9James Dong 101bebc99d6fa433c04139294a5057f8439d772dbd9James Dong /* Scaling */ 102bebc99d6fa433c04139294a5057f8439d772dbd9James Dong QPer = iQP / 6; 103bebc99d6fa433c04139294a5057f8439d772dbd9James Dong V = armVCM4P10_VMatrix [iQP % 6][0]; 104bebc99d6fa433c04139294a5057f8439d772dbd9James Dong 105bebc99d6fa433c04139294a5057f8439d772dbd9James Dong for (j = 0; j < 4; j++) 106bebc99d6fa433c04139294a5057f8439d772dbd9James Dong { 107bebc99d6fa433c04139294a5057f8439d772dbd9James Dong for (i = 0; i < 4; i++) 108bebc99d6fa433c04139294a5057f8439d772dbd9James Dong { 109bebc99d6fa433c04139294a5057f8439d772dbd9James Dong if (QPer < 2) 110bebc99d6fa433c04139294a5057f8439d772dbd9James Dong { 111bebc99d6fa433c04139294a5057f8439d772dbd9James Dong Value = (m2[j][i] * V + (1 << (1 - QPer))) >> (2 - QPer); 112bebc99d6fa433c04139294a5057f8439d772dbd9James Dong } 113bebc99d6fa433c04139294a5057f8439d772dbd9James Dong else 114bebc99d6fa433c04139294a5057f8439d772dbd9James Dong { 115bebc99d6fa433c04139294a5057f8439d772dbd9James Dong Value = m2[j][i] * V * (1 << (QPer - 2)); 116bebc99d6fa433c04139294a5057f8439d772dbd9James Dong } 117bebc99d6fa433c04139294a5057f8439d772dbd9James Dong 118bebc99d6fa433c04139294a5057f8439d772dbd9James Dong pDst[j * 4 + i] = (OMX_S16) Value; 119bebc99d6fa433c04139294a5057f8439d772dbd9James Dong 120bebc99d6fa433c04139294a5057f8439d772dbd9James Dong } 121bebc99d6fa433c04139294a5057f8439d772dbd9James Dong } 122bebc99d6fa433c04139294a5057f8439d772dbd9James Dong return OMX_Sts_NoErr; 123bebc99d6fa433c04139294a5057f8439d772dbd9James Dong} 124bebc99d6fa433c04139294a5057f8439d772dbd9James Dong 125bebc99d6fa433c04139294a5057f8439d772dbd9James Dong/***************************************************************************** 126bebc99d6fa433c04139294a5057f8439d772dbd9James Dong * END OF FILE 127bebc99d6fa433c04139294a5057f8439d772dbd9James Dong *****************************************************************************/ 128bebc99d6fa433c04139294a5057f8439d772dbd9James Dong 129