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>
43 
44 namespace dirac
45 {
46  class EncQueue;
47 
49 
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
132 
135 
138 
140  float m_lambda;
141 
144 
145 
148 
151 
155  int num_refs;
156 
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
CompSort
Types of picture component.
Definition: common.h:87
Definition of class SequenceHeaderByteIO.
Definition: accessunit_byteio.h:51
short ValueType
Type of picture data (including motion compensated residuals)
Definition: common.h:70
const EncoderParams & m_encparams
A local reference to the encoder parameters.
Definition: me_mode_decn.h:134
float ModeCost(const int xindex, const int yindex)
Return a measure of the cost of coding a given mode.
Decides between superblock and block prediction modes.
Definition: me_mode_decn.h:69
OneDArray< MEData *> m_me_data_set
Motion vector data for each level of splitting.
Definition: me_mode_decn.h:150
int m_ysb_loc
Definition: me_mode_decn.h:161
const PicArray * m_ref1_updata
Definition: me_mode_decn.h:153
A class for calculating the difference between a block and its DC value (average) ...
Definition: me_utils.h:198
const PicArray * m_ref2_updata
Definition: me_mode_decn.h:154
void DoLevelDecn(int level)
Make a mode decision given a particular level of decomposition.
Structure to hold motion parameters when motion comp is used.
Definition: common.h:967
int num_refs
Definition: me_mode_decn.h:155
Parameters for the encoding process.
Definition: common.h:1279
OneDArray< float > m_mode_factor
Correction factor for comparing mode costs for different SB splittings.
Definition: me_mode_decn.h:147
A class for picture component data.
Definition: common.h:718
Picture type Class.
Definition: common.h:228
const PicArray * m_pic_data
Definition: me_mode_decn.h:152
const PicturePredParams * m_predparams
A local pointer to the picture prediction params.
Definition: me_mode_decn.h:137
A virtual class for bi-directional differences.
Definition: me_utils.h:230
void DoModeDecn(EncQueue &my_buffer, int pic_num)
Does the actual mode decision.
ModeDecider & operator=(const ModeDecider &rhs)
void SetDC(EncQueue &my_buffer, int pic_num)
Go through all the intra blocks and extract the chroma dc values to be coded.
ValueType GetDCPred(int xblock, int yblock)
Get a prediction for the dc value of a block.
float GetDCVar(const ValueType dc_val, const ValueType dc_pred)
Get a measure of DC value variance.
OneDArray< float > m_level_factor
Correction factor for comparing SAD costs for different SB splittings.
Definition: me_mode_decn.h:143
Class for all the motion estimation data.
Definition: motion.h:313
Holds pictures both for reference and to overcome reordering delay.
Definition: enc_queue.h:59
IntraBlockDiff * m_intradiff
Definition: me_mode_decn.h:157
float m_lambda
The Lagrangian parameter for motion estimation.
Definition: me_mode_decn.h:140
void DoME(const int xpos, const int ypos, const int level)
Do motion estimation for a prediction unit at a given level.
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)
int m_xsb_loc
Definition: me_mode_decn.h:161
~ModeDecider()
Destructor.
PictureSort m_psort
Definition: me_mode_decn.h:131
ValueType GetBlockDC(const PicArray &pic_data, int xloc, int yloc, int split, CompSort cs)
Called by previous fn for each block.
ModeDecider(const EncoderParams &encp)
Constructor.
BiBlockDiff * m_bicheckdiff
Definition: me_mode_decn.h:158

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