1/****************************************************************************** 2* 3* Copyright (C) 2012 Ittiam Systems Pvt Ltd, Bangalore 4* 5* Licensed under the Apache License, Version 2.0 (the "License"); 6* you may not use this file except in compliance with the License. 7* You may obtain a copy of the License at: 8* 9* http://www.apache.org/licenses/LICENSE-2.0 10* 11* Unless required by applicable law or agreed to in writing, software 12* distributed under the License is distributed on an "AS IS" BASIS, 13* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 14* See the License for the specific language governing permissions and 15* limitations under the License. 16* 17******************************************************************************/ 18/** 19 ******************************************************************************* 20 * @file 21 * ihevcd_itrans_recon_dc.c 22 * 23 * @brief 24 * Contains functions for DC inverse transform and reconstruction 25 * 26 * @author 27 * Ittiam 28 * 29 * @par List of Functions: 30 * - ihevcd_itrans_recon_dc_luma() 31 * - ihevcd_itrans_recon_dc_chroma() 32 * 33 * @remarks 34 * None 35 * 36 ******************************************************************************* 37 */ 38/*****************************************************************************/ 39/* File Includes */ 40/*****************************************************************************/ 41#include <stdio.h> 42#include <stddef.h> 43#include <stdlib.h> 44#include <string.h> 45 46#include "ihevc_typedefs.h" 47#include "iv.h" 48#include "ivd.h" 49#include "ihevcd_cxa.h" 50 51#include "ihevc_defs.h" 52#include "ihevc_debug.h" 53#include "ihevc_structs.h" 54#include "ihevc_cabac_tables.h" 55#include "ihevc_macros.h" 56#include "ihevc_platform_macros.h" 57 58#include "ihevcd_defs.h" 59#include "ihevcd_function_selector.h" 60#include "ihevcd_structs.h" 61#include "ihevcd_error.h" 62#include "ihevcd_bitstream.h" 63#include "ihevc_common_tables.h" 64 65/* Intra pred includes */ 66#include "ihevc_intra_pred.h" 67 68/* Inverse transform common module includes */ 69#include "ihevc_trans_tables.h" 70#include "ihevc_trans_macros.h" 71#include "ihevc_itrans_recon.h" 72#include "ihevc_recon.h" 73#include "ihevc_chroma_itrans_recon.h" 74#include "ihevc_chroma_recon.h" 75 76/* Decoder includes */ 77#include "ihevcd_common_tables.h" 78#include "ihevcd_iquant_itrans_recon_ctb.h" 79#include "ihevcd_debug.h" 80#include "ihevcd_profile.h" 81#include "ihevcd_statistics.h" 82#include "ihevcd_itrans_recon_dc.h" 83 84 85 86void ihevcd_itrans_recon_dc_luma(UWORD8 *pu1_pred, 87 UWORD8 *pu1_dst, 88 WORD32 pred_strd, 89 WORD32 dst_strd, 90 WORD32 log2_trans_size, 91 WORD16 i2_coeff_value) 92{ 93 WORD32 row, col; 94 WORD32 add, shift; 95 WORD32 dc_value, quant_out; 96 WORD32 trans_size; 97 98 trans_size = (1 << log2_trans_size); 99 100 quant_out = i2_coeff_value; 101 102 shift = IT_SHIFT_STAGE_1; 103 add = 1 << (shift - 1); 104 dc_value = CLIP_S16((quant_out * 64 + add) >> shift); 105 shift = IT_SHIFT_STAGE_2; 106 add = 1 << (shift - 1); 107 dc_value = CLIP_S16((dc_value * 64 + add) >> shift); 108 109 for(row = 0; row < trans_size; row++) 110 for(col = 0; col < trans_size; col++) 111 pu1_dst[row * dst_strd + col] = CLIP_U8((pu1_pred[row * pred_strd + col] + dc_value)); 112 113} 114 115 116void ihevcd_itrans_recon_dc_chroma(UWORD8 *pu1_pred, 117 UWORD8 *pu1_dst, 118 WORD32 pred_strd, 119 WORD32 dst_strd, 120 WORD32 log2_trans_size, 121 WORD16 i2_coeff_value) 122{ 123 WORD32 row, col; 124 WORD32 add, shift; 125 WORD32 dc_value, quant_out; 126 WORD32 trans_size; 127 128 129 trans_size = (1 << log2_trans_size); 130 131 quant_out = i2_coeff_value; 132 133 shift = IT_SHIFT_STAGE_1; 134 add = 1 << (shift - 1); 135 dc_value = CLIP_S16((quant_out * 64 + add) >> shift); 136 shift = IT_SHIFT_STAGE_2; 137 add = 1 << (shift - 1); 138 dc_value = CLIP_S16((dc_value * 64 + add) >> shift); 139 140 for(row = 0; row < trans_size; row++) 141 for(col = 0; col < trans_size; col++) 142 pu1_dst[row * dst_strd + (col << 1)] = CLIP_U8((pu1_pred[row * pred_strd + (col << 1)] + dc_value)); 143 144} 145 146 147