Created by the British Broadcasting Corporation.
00001 /* ***** BEGIN LICENSE BLOCK ***** 00002 * 00003 * $Id: mv_codec.h,v 1.14 2005/04/06 14:31:11 tjdwave Exp $ $Name: Dirac_0_5_2 $ 00004 * 00005 * Version: MPL 1.1/GPL 2.0/LGPL 2.1 00006 * 00007 * The contents of this file are subject to the Mozilla Public License 00008 * Version 1.1 (the "License"); you may not use this file except in compliance 00009 * with the License. You may obtain a copy of the License at 00010 * http://www.mozilla.org/MPL/ 00011 * 00012 * Software distributed under the License is distributed on an "AS IS" basis, 00013 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License for 00014 * the specific language governing rights and limitations under the License. 00015 * 00016 * The Original Code is BBC Research and Development code. 00017 * 00018 * The Initial Developer of the Original Code is the British Broadcasting 00019 * Corporation. 00020 * Portions created by the Initial Developer are Copyright (C) 2004. 00021 * All Rights Reserved. 00022 * 00023 * Contributor(s): Thomas Davies (Original Author), Scott R Ladd 00024 * 00025 * Alternatively, the contents of this file may be used under the terms of 00026 * the GNU General Public License Version 2 (the "GPL"), or the GNU Lesser 00027 * Public License Version 2.1 (the "LGPL"), in which case the provisions of 00028 * the GPL or the LGPL are applicable instead of those above. If you wish to 00029 * allow use of your version of this file only under the terms of the either 00030 * the GPL or LGPL and not to allow others to use your version of this file 00031 * under the MPL, indicate your decision by deleting the provisions above 00032 * and replace them with the notice and other provisions required by the GPL 00033 * or LGPL. If you do not delete the provisions above, a recipient may use 00034 * your version of this file under the terms of any one of the MPL, the GPL 00035 * or the LGPL. 00036 * ***** END LICENSE BLOCK ***** */ 00037 00038 #ifndef _MV_CODEC_H_ 00039 #define _MV_CODEC_H_ 00040 00042 //Class to do motion vector coding and decoding// 00043 //------using adaptive arithmetic coding-------// 00045 00046 #include <libdirac_common/arith_codec.h> 00047 #include <libdirac_common/common.h> 00048 #include <libdirac_common/motion.h> 00049 #include <libdirac_common/wavelet_utils.h> 00050 #include <vector> 00051 00052 namespace dirac 00053 { 00054 00056 00059 class MvDataCodec: public ArithCodec<MvData> 00060 { 00061 public: 00063 00069 MvDataCodec(BasicOutputManager* bits_out, 00070 size_t number_of_contexts, 00071 const ChromaFormat & cf); 00072 00074 00080 MvDataCodec(BitInputManager* bits_in, 00081 size_t number_of_contexts, 00082 const ChromaFormat & cf); 00083 00085 void InitContexts(); 00086 00087 private: 00088 00089 int m_MB_count; 00090 const int m_reset_num; 00091 00092 const ChromaFormat & m_cformat; 00093 00094 // Position of current block 00095 int m_b_xp, m_b_yp; 00096 // Position of current MB 00097 int m_mb_xp, m_mb_yp; 00098 // Position of top-left block of current MB 00099 int m_mb_tlb_x, m_mb_tlb_y; 00100 00101 private: 00102 00103 // functions 00105 MvDataCodec(const MvDataCodec& cpy); 00107 MvDataCodec& operator=(const MvDataCodec& rhs); 00108 00109 // coding functions 00110 // Code the MB splitting mode 00111 void CodeMBSplit(const MvData& in_data); 00112 // Code the MB common ref mode 00113 void CodeMBCom(const MvData& in_data); 00114 // Code the block prediction mode 00115 void CodePredmode(const MvData& in_data); 00116 // Code the first motion vector 00117 void CodeMv1(const MvData& in_data); 00118 // Code the second motion vector 00119 void CodeMv2(const MvData& in_data); 00120 // Code the dc value of intra blocks 00121 void CodeDC(const MvData& in_data); 00122 00123 // decoding functions 00124 // Decode the MB splitting mode 00125 void DecodeMBSplit( MvData& out_data); 00126 // Decode the MB common ref mode 00127 void DecodeMBCom( MvData& out_data); 00128 // Decode the block prediction mode 00129 void DecodePredmode(MvData& out_data); 00130 // Decode the first motion vector 00131 void DecodeMv1( MvData& out_data); 00132 // Decode the second motion vector 00133 void DecodeMv2( MvData& out_data); 00134 // Decode the dc value of intra blocks 00135 void DecodeDC( MvData& out_data); 00136 00137 void DoWorkCode( MvData& in_data ); 00138 void DoWorkDecode(MvData& out_data); 00139 00140 // Context stuff 00141 void ResetAll(); 00142 00143 int ChooseMBSContext(const MvData& data, const int BinNumber) const; 00144 int ChooseMBCContext(const MvData& data) const; 00145 int ChooseREF1xContext(const MvData& data, const int BinNumber) const; 00146 int ChooseREF1xSignContext(const MvData& data) const; 00147 int ChooseREF1yContext(const MvData& data, const int BinNumber) const; 00148 int ChooseREF1ySignContext(const MvData& data) const; 00149 int ChooseREF2xContext(const MvData& data, const int BinNumber) const; 00150 int ChooseREF2xSignContext(const MvData& data) const; 00151 int ChooseREF2yContext(const MvData& data, const int BinNumber) const; 00152 int ChooseREF2ySignContext(const MvData& data) const; 00153 int ChooseYDCContext(const MvData& data, const int BinNumber) const; 00154 int ChooseUDCContext(const MvData& data, const int BinNumber) const; 00155 int ChooseVDCContext(const MvData& data, const int BinNumber) const; 00156 int ChooseYDCSignContext(const MvData& data) const; 00157 int ChooseUDCSignContext(const MvData& data) const; 00158 int ChooseVDCSignContext(const MvData& data) const; 00159 00160 //prediction stuff 00161 unsigned int MBSplitPrediction(const TwoDArray<int>& mbdata) const; 00162 bool MBCBModePrediction(const TwoDArray<bool>& mbdata) const; 00163 unsigned int BlockModePrediction(const TwoDArray<PredMode>& preddata) const; 00164 MVector Mv1Prediction(const MvArray& mvarray,const TwoDArray<PredMode>& preddata) const; 00165 MVector Mv2Prediction(const MvArray& mvarray,const TwoDArray<PredMode>& preddata) const; 00166 ValueType DCPrediction(const TwoDArray<ValueType>& dcdata,const TwoDArray<PredMode>& preddata) const; 00167 }; 00168 00169 }// end namepace dirac 00170 00171 #endif
© 2004 British Broadcasting Corporation.
Dirac code licensed under the Mozilla Public License (MPL) Version 1.1.
HTML documentation generated by Dimitri van Heesch's
excellent Doxygen tool.