# Dirac - A Video Codec

Created by the British Broadcasting Corporation.

me_mode_decn.h
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37
38#ifndef _ME_MODE_DECN_H_
39#define _ME_MODE_DECN_H_
40
41#include <libdirac_common/motion.h>
42#include <libdirac_motionest/block_match.h>
43
44 namespace dirac
45{
46 class EncQueue;
47
49
69 class ModeDecider
70 {
71
72 public:
74
79 ModeDecider(const EncoderParams& encp );
80
82
85 ~ModeDecider();
86
88
93 void DoModeDecn( EncQueue& my_buffer , int pic_num );
94
95 private:
96 ModeDecider( const ModeDecider& cpy );//private, body-less copy constructor: this class should not be copied
97 ModeDecider& operator=( const ModeDecider& rhs );//private, body-less assignment=: this class should not be assigned
98
99 //functions
100 void DoSBDecn(); //called by do_mode_decn for each SB
101
103 void DoLevelDecn( int level );
104
106 float DoUnitDecn( const int xpos , const int ypos , const int level );
107
109 void DoME( const int xpos , const int ypos , const int level );
110
112 float ModeCost( const int xindex , const int yindex );
113
115 ValueType GetDCPred( int xblock , int yblock );
116
118 float GetDCVar( const ValueType dc_val , const ValueType dc_pred);
119
121 void SetDC( EncQueue& my_buffer, int pic_num);
122
124 void SetDC(const PicArray& pic_data, MEData& me_data,CompSort cs);
125
127 ValueType GetBlockDC(const PicArray& pic_data, int xloc,int yloc,int split, CompSort cs);
128
129
130 // Member data
131 PictureSort m_psort;
132
134 const EncoderParams& m_encparams;
135
137 const PicturePredParams* m_predparams;
138
140 float m_lambda;
141
143 OneDArray<float> m_level_factor;
144
145
147 OneDArray<float> m_mode_factor;
148
150 OneDArray< MEData* > m_me_data_set;
151
152 const PicArray* m_pic_data;
153 const PicArray* m_ref1_updata;
154 const PicArray* m_ref2_updata;
155 int num_refs;
156
157 IntraBlockDiff* m_intradiff;
158 BiBlockDiff* m_bicheckdiff;
159
160 //position variables, used in all the mode decisions
161 int m_xsb_loc,m_ysb_loc; //coords of the current SB
162
163 };
164
165} // namespace dirac
166
167#endif
motion.h
block_match.h
dirac
Definition of class SequenceHeaderByteIO.
Definition: accessunit_byteio.h:52
dirac::CompSort
CompSort
Types of picture component.
Definition: common.h:87
dirac::ValueType
short ValueType
Type of picture data (including motion compensated residuals)
Definition: common.h:70
dirac::OneDArray< float >
dirac::PictureSort
Picture type Class.
Definition: common.h:229
dirac::PicArray
A class for picture component data.
Definition: common.h:719
dirac::PicturePredParams
Structure to hold motion parameters when motion comp is used.
Definition: common.h:968
dirac::EncoderParams
Parameters for the encoding process.
Definition: common.h:1280
dirac::MEData
Class for all the motion estimation data.
Definition: motion.h:314
dirac::EncQueue
Holds pictures both for reference and to overcome reordering delay.
Definition: enc_queue.h:59
dirac::ModeDecider
Decides between superblock and block prediction modes.
Definition: me_mode_decn.h:70
dirac::ModeDecider::m_level_factor
OneDArray< float > m_level_factor
Correction factor for comparing SAD costs for different SB splittings.
Definition: me_mode_decn.h:143
dirac::ModeDecider::num_refs
int num_refs
Definition: me_mode_decn.h:155
dirac::ModeDecider::GetDCVar
float GetDCVar(const ValueType dc_val, const ValueType dc_pred)
Get a measure of DC value variance.
dirac::ModeDecider::m_lambda
float m_lambda
The Lagrangian parameter for motion estimation.
Definition: me_mode_decn.h:140
dirac::ModeDecider::DoSBDecn
void DoSBDecn()
dirac::ModeDecider::m_predparams
const PicturePredParams * m_predparams
A local pointer to the picture prediction params.
Definition: me_mode_decn.h:137
dirac::ModeDecider::m_intradiff
IntraBlockDiff * m_intradiff
Definition: me_mode_decn.h:157
dirac::ModeDecider::operator=
ModeDecider & operator=(const ModeDecider &rhs)
dirac::ModeDecider::ModeCost
float ModeCost(const int xindex, const int yindex)
Return a measure of the cost of coding a given mode.
dirac::ModeDecider::m_me_data_set
OneDArray< MEData * > m_me_data_set
Motion vector data for each level of splitting.
Definition: me_mode_decn.h:150
dirac::ModeDecider::ModeDecider
ModeDecider(const EncoderParams &encp)
Constructor.
dirac::ModeDecider::m_xsb_loc
int m_xsb_loc
Definition: me_mode_decn.h:161
dirac::ModeDecider::m_psort
PictureSort m_psort
Definition: me_mode_decn.h:131
dirac::ModeDecider::m_mode_factor
OneDArray< float > m_mode_factor
Correction factor for comparing mode costs for different SB splittings.
Definition: me_mode_decn.h:147
dirac::ModeDecider::DoME
void DoME(const int xpos, const int ypos, const int level)
Do motion estimation for a prediction unit at a given level.
dirac::ModeDecider::SetDC
void SetDC(EncQueue &my_buffer, int pic_num)
Go through all the intra blocks and extract the chroma dc values to be coded.
dirac::ModeDecider::m_encparams
const EncoderParams & m_encparams
A local reference to the encoder parameters.
Definition: me_mode_decn.h:134
dirac::ModeDecider::m_bicheckdiff
BiBlockDiff * m_bicheckdiff
Definition: me_mode_decn.h:158
dirac::ModeDecider::GetDCPred
ValueType GetDCPred(int xblock, int yblock)
Get a prediction for the dc value of a block.
dirac::ModeDecider::m_ref1_updata
const PicArray * m_ref1_updata
Definition: me_mode_decn.h:153
dirac::ModeDecider::DoUnitDecn
float DoUnitDecn(const int xpos, const int ypos, const int level)
Decide on a mode for a given prediction unit (block, sub-SB or SB)
dirac::ModeDecider::SetDC
void SetDC(const PicArray &pic_data, MEData &me_data, CompSort cs)
Called by previous fn for each component.
dirac::ModeDecider::~ModeDecider
~ModeDecider()
Destructor.
dirac::ModeDecider::DoLevelDecn
void DoLevelDecn(int level)
Make a mode decision given a particular level of decomposition.
dirac::ModeDecider::GetBlockDC
ValueType GetBlockDC(const PicArray &pic_data, int xloc, int yloc, int split, CompSort cs)
Called by previous fn for each block.
dirac::ModeDecider::m_ref2_updata
const PicArray * m_ref2_updata
Definition: me_mode_decn.h:154
dirac::ModeDecider::ModeDecider
ModeDecider(const ModeDecider &cpy)
dirac::ModeDecider::m_ysb_loc
int m_ysb_loc
Definition: me_mode_decn.h:161
dirac::ModeDecider::m_pic_data
const PicArray * m_pic_data
Definition: me_mode_decn.h:152
dirac::ModeDecider::DoModeDecn
void DoModeDecn(EncQueue &my_buffer, int pic_num)
Does the actual mode decision.
dirac::IntraBlockDiff
A class for calculating the difference between a block and its DC value (average)
Definition: me_utils.h:199
dirac::BiBlockDiff
A virtual class for bi-directional differences.
Definition: me_utils.h:231

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