# Dirac - A Video Codec

Created by the British Broadcasting Corporation.

quant_chooser.h
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1 /* ***** BEGIN LICENSE BLOCK *****
2 *
3 * $Id: quant_chooser.h,v 1.7 2008/05/27 01:29:54 asuraparaju Exp $ $Name: Dirac_1_0_2 $
4 *
5 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
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7 * The contents of this file are subject to the Mozilla Public License
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16 * The Original Code is BBC Research and Development code.
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18 * The Initial Developer of the Original Code is the British Broadcasting
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23 * Contributor(s): Thomas Davies (Original Author)
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37
38
39 #ifndef _QUANT_CHOOSER_H_
40 #define _QUANT_CHOOSER_H_
41
42 #include <libdirac_common/arrays.h>
43 #include <libdirac_common/wavelet_utils.h>
44 #include <libdirac_common/common.h>
45
46 namespace dirac
47 {
49
52 class QuantChooser
53 {
54 public:
55
57 QuantChooser( const CoeffArray& pic_data , const float lambda );
58
60 int GetBestQuant( Subband& node );
61
63 void SetEntropyCorrection( const float ecfac ){ m_entropy_correctionfactor = ecfac; }
64 private:
66 QuantChooser(const QuantChooser& cpy);
67
69 QuantChooser& operator=(const QuantChooser& rhs);
70
72 void IntegralErrorCalc( Subband& node , const int xratio , const int yratio );
73
75 void NonIntegralErrorCalc( Subband& node, const int xratio, const int yratio );
76
78 void LagrangianCalc();
79
81 void SelectBestQuant();
82
83 CoeffType BlockAbsMax( const Subband& node );
84
86 void SetSkip( CodeBlock& cblock , const int qidx);
87
88 private:
90 float m_subband_wt;
91
93 int m_bottom_idx;
95 int m_top_idx;
97 int m_index_step;
98
100 int m_min_idx;
101
103 const CoeffArray& m_coeff_data;
104
106 const float m_lambda;
107
109 float m_entropy_correctionfactor;
110
112 OneDArray<int> m_count0;
114 int m_count1;
116 OneDArray<int> m_countPOS;
118 OneDArray<int> m_countNEG;
120 OneDArray<double> m_error_total;
122 OneDArray<CostType> m_costs;
123
124 };
125
126 } // namespace dirac
127
128
129
130 #endif

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