10d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar/****************************************************************************** 20d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar* 30d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar* Copyright (C) 2012 Ittiam Systems Pvt Ltd, Bangalore 40d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar* 50d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar* Licensed under the Apache License, Version 2.0 (the "License"); 60d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar* you may not use this file except in compliance with the License. 70d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar* You may obtain a copy of the License at: 80d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar* 90d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar* http://www.apache.org/licenses/LICENSE-2.0 100d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar* 110d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar* Unless required by applicable law or agreed to in writing, software 120d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar* distributed under the License is distributed on an "AS IS" BASIS, 130d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 140d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar* See the License for the specific language governing permissions and 150d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar* limitations under the License. 160d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar* 170d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar******************************************************************************/ 180d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar/** 190d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar ******************************************************************************* 200d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar * @file 210d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar * ihevc_itrans_recon_8x8.c 220d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar * 230d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar * @brief 240d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar * Contains function definitions for inverse transform and reconstruction 8x8 250d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar * 260d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar * 270d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar * @author 280d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar * 100470 290d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar * 300d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar * @par List of Functions: 310d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar * - ihevc_itrans_recon_8x8() 320d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar * 330d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar * @remarks 340d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar * None 350d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar * 360d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar ******************************************************************************* 370d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar */ 380d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar#include <stdio.h> 390d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar#include <string.h> 400d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar#include "ihevc_typedefs.h" 410d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar#include "ihevc_macros.h" 420d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar#include "ihevc_platform_macros.h" 430d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar#include "ihevc_defs.h" 440d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar#include "ihevc_trans_tables.h" 450d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar#include "ihevc_itrans_recon.h" 460d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar#include "ihevc_func_selector.h" 470d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar#include "ihevc_trans_macros.h" 480d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar 490d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar/** 500d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar ******************************************************************************* 510d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar * 520d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar * @brief 530d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar * This function performs Inverse transform and reconstruction for 8x8 540d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar * input block 550d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar * 560d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar * @par Description: 570d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar * Performs inverse transform and adds the prediction data and clips output 580d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar * to 8 bit 590d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar * 600d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar * @param[in] pi2_src 610d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar * Input 8x8 coefficients 620d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar * 630d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar * @param[in] pi2_tmp 640d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar * Temporary 8x8 buffer for storing inverse 650d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar * 660d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar * transform 670d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar * 1st stage output 680d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar * 690d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar * @param[in] pu1_pred 700d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar * Prediction 8x8 block 710d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar * 720d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar * @param[out] pu1_dst 730d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar * Output 8x8 block 740d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar * 750d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar * @param[in] src_strd 760d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar * Input stride 770d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar * 780d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar * @param[in] pred_strd 790d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar * Prediction stride 800d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar * 810d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar * @param[in] dst_strd 820d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar * Output Stride 830d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar * 840d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar * @param[in] shift 850d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar * Output shift 860d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar * 870d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar * @param[in] zero_cols 880d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar * Zero columns in pi2_src 890d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar * 900d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar * @returns Void 910d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar * 920d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar * @remarks 930d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar * None 940d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar * 950d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar ******************************************************************************* 960d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar */ 970d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar 980d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakarvoid ihevc_itrans_recon_8x8(WORD16 *pi2_src, 990d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar WORD16 *pi2_tmp, 1000d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar UWORD8 *pu1_pred, 1010d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar UWORD8 *pu1_dst, 1020d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar WORD32 src_strd, 1030d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar WORD32 pred_strd, 1040d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar WORD32 dst_strd, 1050d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar WORD32 zero_cols, 1060d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar WORD32 zero_rows) 1070d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar{ 1080d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar WORD32 j, k; 1090d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar WORD32 e[4], o[4]; 1100d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar WORD32 ee[2], eo[2]; 1110d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar WORD32 add; 1120d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar WORD32 shift; 1130d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar WORD16 *pi2_tmp_orig; 1140d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar WORD32 trans_size; 1150d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar WORD32 zero_rows_2nd_stage = zero_cols; 1160d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar WORD32 row_limit_2nd_stage; 1170d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar 1180d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar trans_size = TRANS_SIZE_8; 1190d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar 1200d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar pi2_tmp_orig = pi2_tmp; 1210d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar 1220d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar if((zero_cols & 0xF0) == 0xF0) 1230d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar row_limit_2nd_stage = 4; 1240d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar else 1250d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar row_limit_2nd_stage = TRANS_SIZE_8; 1260d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar 1270d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar 1280d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar if((zero_rows & 0xF0) == 0xF0) /* First 4 rows of input are non-zero */ 1290d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar { 1300d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar /************************************************************************************************/ 1310d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar /**********************************START - IT_RECON_8x8******************************************/ 1320d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar /************************************************************************************************/ 1330d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar 1340d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar /* Inverse Transform 1st stage */ 1350d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar shift = IT_SHIFT_STAGE_1; 1360d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar add = 1 << (shift - 1); 1370d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar 1380d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar for(j = 0; j < row_limit_2nd_stage; j++) 1390d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar { 1400d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar /* Checking for Zero Cols */ 1410d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar if((zero_cols & 1) == 1) 1420d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar { 1430d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar memset(pi2_tmp, 0, trans_size * sizeof(WORD16)); 1440d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar } 1450d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar else 1460d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar { 1470d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar /* Utilizing symmetry properties to the maximum to minimize the number of multiplications */ 1480d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar for(k = 0; k < 4; k++) 1490d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar { 1500d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar o[k] = g_ai2_ihevc_trans_8[1][k] * pi2_src[src_strd] 1510d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar + g_ai2_ihevc_trans_8[3][k] 1520d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar * pi2_src[3 * src_strd]; 1530d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar } 1540d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar eo[0] = g_ai2_ihevc_trans_8[2][0] * pi2_src[2 * src_strd]; 1550d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar eo[1] = g_ai2_ihevc_trans_8[2][1] * pi2_src[2 * src_strd]; 1560d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar ee[0] = g_ai2_ihevc_trans_8[0][0] * pi2_src[0]; 1570d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar ee[1] = g_ai2_ihevc_trans_8[0][1] * pi2_src[0]; 1580d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar 1590d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar /* Combining e and o terms at each hierarchy levels to calculate the final spatial domain vector */ 1600d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar e[0] = ee[0] + eo[0]; 1610d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar e[3] = ee[0] - eo[0]; 1620d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar e[1] = ee[1] + eo[1]; 1630d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar e[2] = ee[1] - eo[1]; 1640d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar for(k = 0; k < 4; k++) 1650d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar { 1660d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar pi2_tmp[k] = 1670d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar CLIP_S16(((e[k] + o[k] + add) >> shift)); 1680d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar pi2_tmp[k + 4] = 1690d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar CLIP_S16(((e[3 - k] - o[3 - k] + add) >> shift)); 1700d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar } 1710d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar } 1720d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar pi2_src++; 1730d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar pi2_tmp += trans_size; 1740d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar zero_cols = zero_cols >> 1; 1750d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar } 1760d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar 1770d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar pi2_tmp = pi2_tmp_orig; 1780d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar 1790d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar /* Inverse Transform 2nd stage */ 1800d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar shift = IT_SHIFT_STAGE_2; 1810d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar add = 1 << (shift - 1); 1820d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar if((zero_rows_2nd_stage & 0xF0) == 0xF0) /* First 4 rows of output of 1st stage are non-zero */ 1830d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar { 1840d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar for(j = 0; j < trans_size; j++) 1850d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar { 1860d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar /* Utilizing symmetry properties to the maximum to minimize the number of multiplications */ 1870d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar for(k = 0; k < 4; k++) 1880d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar { 1890d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar o[k] = g_ai2_ihevc_trans_8[1][k] * pi2_tmp[trans_size] 1900d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar + g_ai2_ihevc_trans_8[3][k] * pi2_tmp[3 * trans_size]; 1910d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar } 1920d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar eo[0] = g_ai2_ihevc_trans_8[2][0] * pi2_tmp[2 * trans_size]; 1930d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar eo[1] = g_ai2_ihevc_trans_8[2][1] * pi2_tmp[2 * trans_size]; 1940d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar ee[0] = g_ai2_ihevc_trans_8[0][0] * pi2_tmp[0]; 1950d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar ee[1] = g_ai2_ihevc_trans_8[0][1] * pi2_tmp[0]; 1960d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar 1970d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar /* Combining e and o terms at each hierarchy levels to calculate the final spatial domain vector */ 1980d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar e[0] = ee[0] + eo[0]; 1990d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar e[3] = ee[0] - eo[0]; 2000d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar e[1] = ee[1] + eo[1]; 2010d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar e[2] = ee[1] - eo[1]; 2020d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar for(k = 0; k < 4; k++) 2030d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar { 2040d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar WORD32 itrans_out; 2050d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar itrans_out = 2060d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar CLIP_S16(((e[k] + o[k] + add) >> shift)); 2070d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar pu1_dst[k] = CLIP_U8((itrans_out + pu1_pred[k])); 2080d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar itrans_out = 2090d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar CLIP_S16(((e[3 - k] - o[3 - k] + add) >> shift)); 2100d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar pu1_dst[k + 4] = CLIP_U8((itrans_out + pu1_pred[k + 4])); 2110d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar } 2120d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar pi2_tmp++; 2130d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar pu1_pred += pred_strd; 2140d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar pu1_dst += dst_strd; 2150d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar } 2160d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar } 2170d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar else /* All rows of output of 1st stage are non-zero */ 2180d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar { 2190d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar for(j = 0; j < trans_size; j++) 2200d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar { 2210d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar /* Utilizing symmetry properties to the maximum to minimize the number of multiplications */ 2220d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar for(k = 0; k < 4; k++) 2230d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar { 2240d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar o[k] = g_ai2_ihevc_trans_8[1][k] * pi2_tmp[trans_size] 2250d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar + g_ai2_ihevc_trans_8[3][k] 2260d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar * pi2_tmp[3 * trans_size] 2270d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar + g_ai2_ihevc_trans_8[5][k] 2280d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar * pi2_tmp[5 * trans_size] 2290d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar + g_ai2_ihevc_trans_8[7][k] 2300d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar * pi2_tmp[7 * trans_size]; 2310d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar } 2320d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar 2330d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar eo[0] = g_ai2_ihevc_trans_8[2][0] * pi2_tmp[2 * trans_size] 2340d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar + g_ai2_ihevc_trans_8[6][0] * pi2_tmp[6 * trans_size]; 2350d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar eo[1] = g_ai2_ihevc_trans_8[2][1] * pi2_tmp[2 * trans_size] 2360d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar + g_ai2_ihevc_trans_8[6][1] * pi2_tmp[6 * trans_size]; 2370d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar ee[0] = g_ai2_ihevc_trans_8[0][0] * pi2_tmp[0] 2380d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar + g_ai2_ihevc_trans_8[4][0] * pi2_tmp[4 * trans_size]; 2390d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar ee[1] = g_ai2_ihevc_trans_8[0][1] * pi2_tmp[0] 2400d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar + g_ai2_ihevc_trans_8[4][1] * pi2_tmp[4 * trans_size]; 2410d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar 2420d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar /* Combining e and o terms at each hierarchy levels to calculate the final spatial domain vector */ 2430d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar e[0] = ee[0] + eo[0]; 2440d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar e[3] = ee[0] - eo[0]; 2450d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar e[1] = ee[1] + eo[1]; 2460d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar e[2] = ee[1] - eo[1]; 2470d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar for(k = 0; k < 4; k++) 2480d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar { 2490d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar WORD32 itrans_out; 2500d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar itrans_out = 2510d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar CLIP_S16(((e[k] + o[k] + add) >> shift)); 2520d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar pu1_dst[k] = CLIP_U8((itrans_out + pu1_pred[k])); 2530d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar itrans_out = 2540d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar CLIP_S16(((e[3 - k] - o[3 - k] + add) >> shift)); 2550d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar pu1_dst[k + 4] = CLIP_U8((itrans_out + pu1_pred[k + 4])); 2560d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar } 2570d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar pi2_tmp++; 2580d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar pu1_pred += pred_strd; 2590d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar pu1_dst += dst_strd; 2600d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar } 2610d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar } 2620d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar /************************************************************************************************/ 2630d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar /************************************END - IT_RECON_8x8******************************************/ 2640d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar /************************************************************************************************/ 2650d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar } 2660d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar else /* All rows of input are non-zero */ 2670d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar { 2680d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar /************************************************************************************************/ 2690d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar /**********************************START - IT_RECON_8x8******************************************/ 2700d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar /************************************************************************************************/ 2710d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar 2720d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar /* Inverse Transform 1st stage */ 2730d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar shift = IT_SHIFT_STAGE_1; 2740d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar add = 1 << (shift - 1); 2750d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar 2760d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar for(j = 0; j < row_limit_2nd_stage; j++) 2770d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar { 2780d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar /* Checking for Zero Cols */ 2790d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar if((zero_cols & 1) == 1) 2800d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar { 2810d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar memset(pi2_tmp, 0, trans_size * sizeof(WORD16)); 2820d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar } 2830d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar else 2840d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar { 2850d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar /* Utilizing symmetry properties to the maximum to minimize the number of multiplications */ 2860d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar for(k = 0; k < 4; k++) 2870d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar { 2880d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar o[k] = g_ai2_ihevc_trans_8[1][k] * pi2_src[src_strd] 2890d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar + g_ai2_ihevc_trans_8[3][k] 2900d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar * pi2_src[3 * src_strd] 2910d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar + g_ai2_ihevc_trans_8[5][k] 2920d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar * pi2_src[5 * src_strd] 2930d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar + g_ai2_ihevc_trans_8[7][k] 2940d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar * pi2_src[7 * src_strd]; 2950d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar } 2960d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar 2970d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar eo[0] = g_ai2_ihevc_trans_8[2][0] * pi2_src[2 * src_strd] 2980d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar + g_ai2_ihevc_trans_8[6][0] * pi2_src[6 * src_strd]; 2990d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar eo[1] = g_ai2_ihevc_trans_8[2][1] * pi2_src[2 * src_strd] 3000d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar + g_ai2_ihevc_trans_8[6][1] * pi2_src[6 * src_strd]; 3010d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar ee[0] = g_ai2_ihevc_trans_8[0][0] * pi2_src[0] 3020d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar + g_ai2_ihevc_trans_8[4][0] * pi2_src[4 * src_strd]; 3030d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar ee[1] = g_ai2_ihevc_trans_8[0][1] * pi2_src[0] 3040d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar + g_ai2_ihevc_trans_8[4][1] * pi2_src[4 * src_strd]; 3050d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar 3060d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar /* Combining e and o terms at each hierarchy levels to calculate the final spatial domain vector */ 3070d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar e[0] = ee[0] + eo[0]; 3080d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar e[3] = ee[0] - eo[0]; 3090d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar e[1] = ee[1] + eo[1]; 3100d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar e[2] = ee[1] - eo[1]; 3110d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar for(k = 0; k < 4; k++) 3120d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar { 3130d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar pi2_tmp[k] = 3140d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar CLIP_S16(((e[k] + o[k] + add) >> shift)); 3150d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar pi2_tmp[k + 4] = 3160d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar CLIP_S16(((e[3 - k] - o[3 - k] + add) >> shift)); 3170d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar } 3180d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar } 3190d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar pi2_src++; 3200d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar pi2_tmp += trans_size; 3210d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar zero_cols = zero_cols >> 1; 3220d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar } 3230d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar 3240d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar pi2_tmp = pi2_tmp_orig; 3250d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar 3260d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar /* Inverse Transform 2nd stage */ 3270d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar shift = IT_SHIFT_STAGE_2; 3280d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar add = 1 << (shift - 1); 3290d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar if((zero_rows_2nd_stage & 0xF0) == 0xF0) /* First 4 rows of output of 1st stage are non-zero */ 3300d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar { 3310d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar for(j = 0; j < trans_size; j++) 3320d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar { 3330d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar /* Utilizing symmetry properties to the maximum to minimize the number of multiplications */ 3340d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar for(k = 0; k < 4; k++) 3350d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar { 3360d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar o[k] = g_ai2_ihevc_trans_8[1][k] * pi2_tmp[trans_size] 3370d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar + g_ai2_ihevc_trans_8[3][k] * pi2_tmp[3 * trans_size]; 3380d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar } 3390d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar eo[0] = g_ai2_ihevc_trans_8[2][0] * pi2_tmp[2 * trans_size]; 3400d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar eo[1] = g_ai2_ihevc_trans_8[2][1] * pi2_tmp[2 * trans_size]; 3410d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar ee[0] = g_ai2_ihevc_trans_8[0][0] * pi2_tmp[0]; 3420d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar ee[1] = g_ai2_ihevc_trans_8[0][1] * pi2_tmp[0]; 3430d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar 3440d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar /* Combining e and o terms at each hierarchy levels to calculate the final spatial domain vector */ 3450d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar e[0] = ee[0] + eo[0]; 3460d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar e[3] = ee[0] - eo[0]; 3470d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar e[1] = ee[1] + eo[1]; 3480d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar e[2] = ee[1] - eo[1]; 3490d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar for(k = 0; k < 4; k++) 3500d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar { 3510d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar WORD32 itrans_out; 3520d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar itrans_out = 3530d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar CLIP_S16(((e[k] + o[k] + add) >> shift)); 3540d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar pu1_dst[k] = CLIP_U8((itrans_out + pu1_pred[k])); 3550d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar itrans_out = 3560d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar CLIP_S16(((e[3 - k] - o[3 - k] + add) >> shift)); 3570d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar pu1_dst[k + 4] = CLIP_U8((itrans_out + pu1_pred[k + 4])); 3580d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar } 3590d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar pi2_tmp++; 3600d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar pu1_pred += pred_strd; 3610d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar pu1_dst += dst_strd; 3620d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar } 3630d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar } 3640d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar else /* All rows of output of 1st stage are non-zero */ 3650d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar { 3660d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar for(j = 0; j < trans_size; j++) 3670d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar { 3680d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar /* Utilizing symmetry properties to the maximum to minimize the number of multiplications */ 3690d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar for(k = 0; k < 4; k++) 3700d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar { 3710d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar o[k] = g_ai2_ihevc_trans_8[1][k] * pi2_tmp[trans_size] 3720d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar + g_ai2_ihevc_trans_8[3][k] 3730d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar * pi2_tmp[3 * trans_size] 3740d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar + g_ai2_ihevc_trans_8[5][k] 3750d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar * pi2_tmp[5 * trans_size] 3760d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar + g_ai2_ihevc_trans_8[7][k] 3770d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar * pi2_tmp[7 * trans_size]; 3780d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar } 3790d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar 3800d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar eo[0] = g_ai2_ihevc_trans_8[2][0] * pi2_tmp[2 * trans_size] 3810d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar + g_ai2_ihevc_trans_8[6][0] * pi2_tmp[6 * trans_size]; 3820d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar eo[1] = g_ai2_ihevc_trans_8[2][1] * pi2_tmp[2 * trans_size] 3830d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar + g_ai2_ihevc_trans_8[6][1] * pi2_tmp[6 * trans_size]; 3840d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar ee[0] = g_ai2_ihevc_trans_8[0][0] * pi2_tmp[0] 3850d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar + g_ai2_ihevc_trans_8[4][0] * pi2_tmp[4 * trans_size]; 3860d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar ee[1] = g_ai2_ihevc_trans_8[0][1] * pi2_tmp[0] 3870d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar + g_ai2_ihevc_trans_8[4][1] * pi2_tmp[4 * trans_size]; 3880d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar 3890d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar /* Combining e and o terms at each hierarchy levels to calculate the final spatial domain vector */ 3900d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar e[0] = ee[0] + eo[0]; 3910d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar e[3] = ee[0] - eo[0]; 3920d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar e[1] = ee[1] + eo[1]; 3930d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar e[2] = ee[1] - eo[1]; 3940d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar for(k = 0; k < 4; k++) 3950d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar { 3960d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar WORD32 itrans_out; 3970d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar itrans_out = 3980d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar CLIP_S16(((e[k] + o[k] + add) >> shift)); 3990d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar pu1_dst[k] = CLIP_U8((itrans_out + pu1_pred[k])); 4000d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar itrans_out = 4010d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar CLIP_S16(((e[3 - k] - o[3 - k] + add) >> shift)); 4020d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar pu1_dst[k + 4] = CLIP_U8((itrans_out + pu1_pred[k + 4])); 4030d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar } 4040d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar pi2_tmp++; 4050d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar pu1_pred += pred_strd; 4060d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar pu1_dst += dst_strd; 4070d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar } 4080d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar } 4090d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar /************************************************************************************************/ 4100d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar /************************************END - IT_RECON_8x8******************************************/ 4110d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar /************************************************************************************************/ 4120d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar } 4130d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar} 4140d8951cef4b1a1dbf4ff5ba3e8796cf1d4503098Harish Mahendrakar 415