Dirac - A Video Codec

Created by the British Broadcasting Corporation.


motion.h
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1/* ***** BEGIN LICENSE BLOCK *****
2*
3* $Id: motion.h,v 1.30 2008/10/01 01:26:47 asuraparaju Exp $ $Name: Dirac_1_0_2 $
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5* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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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),
24* Chris Bowley,
25* Tim Borer
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39
41#include <algorithm>
42#ifndef _MOTION_H
43#define _MOTION_H
44
45namespace dirac
46{
48 //classes and functions for motion estimation and compensation//
50
51 //classes
52
55
57 template <class T>
59 {
60 public:
61
63 MotionVector<T>(T a, T b) : x(a), y(b) {};
65 MotionVector<T>() : x(0), y(0) {};
67 MotionVector<T>(T a) : x(a), y(a) {};
68
70 inline MotionVector<T> operator+(const MotionVector<T>& argument) const;
71
73 inline MotionVector<T> operator-(const MotionVector<T>& argument) const;
74
76 inline MotionVector<T> operator*(const float argument) const;
77
79 inline MotionVector<T> operator*(const int argument) const;
80
82 inline MotionVector<T> operator<<(const int argument) const;
83
85 inline MotionVector<T> operator>>(const int argument) const;
86
88 T& operator[](const int pos){return ( ( pos==0) ? x : y );}
89
91 const T& operator[](const int pos) const {return ( ( pos==0) ? x : y );}
92
93
95 T x,y;
96
97 };
98
99
100 template <class T>
102 {
103 MotionVector<T> temp;
104 temp.x = x + argument.x;
105 temp.y = y + argument.y;
106
107 return temp;
108 }
109
110 template <class T>
112 {
113 MotionVector<T> temp;
114 temp.x = x-argument.x;
115 temp.y = y-argument.y;
116
117 return temp;
118 }
119
120 template <class T>
121 inline MotionVector<T> MotionVector<T>::operator*(const float argument) const
122 {
123 MotionVector<T> temp;
124 temp.x = x*argument;
125 temp.y = y*argument;
126
127 return temp;
128 }
129
130 template <class T>
131 inline MotionVector<T> MotionVector<T>::operator*(const int argument) const
132 {
133 MotionVector<T> temp;
134 temp.x = x*argument;
135 temp.y = y*argument;
136
137 return temp;
138 }
139
140 template <class T>
141 inline MotionVector<T> MotionVector<T>::operator<<(const int argument) const
142 {
143 MotionVector<T> temp;
144 temp.x = x<<argument;
145 temp.y = y<<argument;
146
147 return temp;
148 }
149
150 template <class T>
151 inline MotionVector<T> MotionVector<T>::operator>>(const int argument) const
152 {
153 MotionVector<T> temp;
154 temp.x = x>>argument;
155 temp.y = y>>argument;
156
157 return temp;
158 }
159
161 template <class T>
162 std::ostream & operator<< (std::ostream & stream, MotionVector<T> & mv)
163 {
164 stream << mv.x << " " << mv.y;
165
166 return stream;
167 }
168
170 template <class T>
171 std::istream & operator>> (std::istream & stream, MotionVector<T> & mv)
172 {
173 stream >> mv.x;
174 stream >> mv.y;
175
176 return stream;
177 }
178
181
184
187
190
193 {
194 public:
197 SAD(0.0),
198 mvcost(0.0),
199 total(0.0){}
200
201 void SetTotal( const float lambda ){total = SAD + lambda*mvcost;}
202
204 float SAD;
205
207 float mvcost;
208
210 float total;
211 };
212
213
215
219 class MvData
220 {
221 public:
223
228 MvData( const PicturePredParams& predparams , const int num_refs);
229
232
235
238
240 MvArray& Vectors(const int ref_id){return *( m_vectors[ref_id] );}
241
243 const MvArray& Vectors(const int ref_id) const {return *( m_vectors[ref_id] );}
244
246 MvArray& GlobalMotionVectors(const int ref_id){return *( m_gm_vectors[ref_id] );}
247
249 const MvArray& GlobalMotionVectors(const int ref_id) const {return *( m_gm_vectors[ref_id] );}
250
252 TwoDArray<ValueType>& DC(CompSort cs){return *( m_dc[cs] );}
253
255 const TwoDArray<ValueType>& DC(CompSort cs) const {return *( m_dc[cs] );}
256
258 const OneDArray< TwoDArray<ValueType>* >& DC() const {return m_dc;}
259
262
264 const TwoDArray<PredMode>& Mode() const {return m_modes;}
265
268
270 const TwoDArray<int>& SBSplit() const{return m_sb_split;}
271
273 OneDArray<float>& GlobalMotionParameters(const int ref_id) { return *( m_gm_params[ref_id] ); }
274
276 const OneDArray<float>& GlobalMotionParameters(const int ref_id) const { return *( m_gm_params[ref_id] ); }
277
278 protected:
279 // A local copy of the picture prediction parameters
281
282 // Initialises the arrays of data
284
285 // The motion vectors
287
288 // The global motion vectors
290
291 // The block modes
293
294 // The DC values
296
297 // The SB split levels
299
300 // Global motion model parameters
302
303// // Number of reference frames
304// unsigned int m_num_refs;
305 };
306
308
312
313 class MEData: public MvData
314 {
315 public:
316
318
323 MEData( const PicturePredParams& predparams , const int num_refs = 2);
324
327
329 void DropRef( int ref_index );
330
332 TwoDArray<MvCostData>& PredCosts(const int ref_id){ return *( m_pred_costs[ref_id] ); }
333
335 const TwoDArray<MvCostData>& PredCosts(const int ref_id) const { return *( m_pred_costs[ref_id] ); }
336
339
341 const TwoDArray<float>& IntraCosts() const { return m_intra_costs; }
342
345
348
351
353 const TwoDArray<float>& SBCosts() const { return m_SB_costs; }
354
356 float IntraBlockRatio() const {return m_intra_block_ratio; }
357
359 void SetIntraBlockRatio(const float r){ m_intra_block_ratio = r; }
360
362 void SetLambdaMap( const int num_refs , const float lambda );
363
365 void SetLambdaMap( const int level , const TwoDArray<float>& l_map , const float wt );
366
368 const TwoDArray<float>& LambdaMap() const { return m_lambda_map; }
369
371 TwoDArray<int>& GlobalMotionInliers(const int ref_id){ return *( m_inliers[ref_id] ); }
372
374 const TwoDArray<int>& GlobalMotionInliers(const int ref_id) const { return *( m_inliers[ref_id] ); }
375
377 friend std::ostream &operator<< (std::ostream & stream, MEData & me_data);
378
380 friend std::istream &operator>> (std::istream & stream, MEData & me_data);
381
382 private:
383 // Initialises the arrays of data
385
386 // Finds transitions in the motion vectors
387 void FindTransitions( TwoDArray<bool>& trans_map , const int ref_num );
388
389 // The costs of predicting each block, for each reference
391
392 // The costs of predicting each block by DC
394
395 // The costs of predicting each block bidirectionally
397
398 // The costs for each macroblock as a whole
400
401 // A map of the lambda values to use
403
404 // Global motion inliers
406
407 // Intra block ratio
409
410 };
411
412 //motion estimation and coding stuff
413
415 int Median( const int val1, const int val2, const int val3);
416
418 MVector MvMedian(const MVector& mv1,const MVector& mv2,const MVector& mv3);
419
420
422 int Median(const std::vector<int>& val_list);
423
425 MVector MvMedian(const std::vector<MVector>& vect_list);
426
428 MVector MvMean(const MVector& mv1, const MVector& mv2);
429
431 inline int Norm2(const MVector& mv){//L^2 norm of a motion vector
432 return mv.x*mv.x+mv.y*mv.y;
433 }
434
436 inline int Norm1(const MVector& mv){//L^1 norm of a motion vector
437 return abs(mv.x)+abs(mv.y);
438 }
439
441 unsigned int GetUMean(std::vector<unsigned int>& values);
442
444 int GetSMean(std::vector<int>& values);
445
446} // namespace dirac
447
448#endif
Definition of class SequenceHeaderByteIO.
Definition accessunit_byteio.h:52
std::ostream & operator<<(std::ostream &stream, TwoDArray< T > &array)
A function for extracting array data.
Definition arrays.h:565
CompSort
Types of picture component.
Definition common.h:87
MVector MvMean(const MVector &mv1, const MVector &mv2)
Return the mean of two motion vectors.
MVector MvMedian(const MVector &mv1, const MVector &mv2, const MVector &mv3)
Return the median of three motion vectors.
unsigned int GetUMean(std::vector< unsigned int > &values)
Return the mean of a set of unsigned integer values.
MotionVector< int > MVector
MVector class is a vector of ints.
Definition motion.h:180
int Norm2(const MVector &mv)
Return the squared length of a motion vector.
Definition motion.h:431
MvElement
Horizontal or vertical.
Definition motion.h:54
@ VERTICAL
Definition motion.h:54
@ HORIZONTAL
Definition motion.h:54
int Median(const int val1, const int val2, const int val3)
Return the median of 3 integers.
int GetSMean(std::vector< int > &values)
Return the mean of a set of signed integer values.
MotionVector< int > ImageCoords
ImageCoords class is a vector of ints.
Definition motion.h:183
TwoDArray< MotionVector< float > > MvFloatArray
An array of float-based motion vectors for doing global motion calcs.
Definition motion.h:189
TwoDArray< MVector > MvArray
MvArray is a two-D array of MVectors.
Definition motion.h:186
int Norm1(const MVector &mv)
Return the sum of the lengths of a motion vector's componets.
Definition motion.h:436
std::istream & operator>>(std::istream &stream, TwoDArray< T > &array)
A function for inserting array data.
Definition arrays.h:581
A template class for one-dimensional arrays.
Definition arrays.h:90
A template class for two-dimensional arrays.
Definition arrays.h:285
Structure to hold motion parameters when motion comp is used.
Definition common.h:968
Motion vector class - just a pair.
Definition motion.h:59
MotionVector(T a, T b)
Constructor.
Definition motion.h:63
T y
Definition motion.h:95
T & operator[](const int pos)
Array-style element access.
Definition motion.h:88
T x
x and y components
Definition motion.h:95
MotionVector< T > operator+(const MotionVector< T > &argument) const
Addition.
Definition motion.h:101
MotionVector()
Default construct - sets components to 0.
Definition motion.h:65
MotionVector< T > operator<<(const int argument) const
Bitshift of each component.
Definition motion.h:141
MotionVector< T > operator*(const float argument) const
Scalar multiplication.
Definition motion.h:121
const T & operator[](const int pos) const
Array-style element access.
Definition motion.h:91
MotionVector< T > operator-(const MotionVector< T > &argument) const
Subtraction.
Definition motion.h:111
MotionVector< T > operator*(const int argument) const
Scalar multiplication.
Definition motion.h:131
MotionVector< T > operator>>(const int argument) const
Bitshift of each component.
Definition motion.h:151
float mvcost
The (Lagrangian-weighted) motion vector cost - the difference of a motion vector from its neighbourin...
Definition motion.h:207
MvCostData()
Constructor.
Definition motion.h:196
float SAD
The Sum of Absolute Differences - easier to compute than Sum-Squared Differences.
Definition motion.h:204
void SetTotal(const float lambda)
Definition motion.h:201
float total
Total=SAD+mvcost.
Definition motion.h:210
TwoDArray< ValueType > & DC(CompSort cs)
Get the DC values for each component.
Definition motion.h:252
PicturePredParams m_predparams
Definition motion.h:280
OneDArray< MvArray * > m_gm_vectors
Definition motion.h:289
const TwoDArray< ValueType > & DC(CompSort cs) const
Get the DC values for each component.
Definition motion.h:255
const MvArray & GlobalMotionVectors(const int ref_id) const
Get the global MVs for a reference.
Definition motion.h:249
OneDArray< MvArray * > m_vectors
Definition motion.h:286
MvArray & Vectors(const int ref_id)
Get the MVs for a reference.
Definition motion.h:240
MvArray & GlobalMotionVectors(const int ref_id)
Get the global MVs for a reference.
Definition motion.h:246
TwoDArray< PredMode > & Mode()
Get the block prediction modes.
Definition motion.h:261
TwoDArray< int > m_sb_split
Definition motion.h:298
TwoDArray< PredMode > m_modes
Definition motion.h:292
const OneDArray< TwoDArray< ValueType > * > & DC() const
Get a reference to the vector holding component DC values.
Definition motion.h:258
~MvData()
Destructor.
MvData(const PicturePredParams &predparams, const int num_refs)
Constructor.
OneDArray< OneDArray< float > * > m_gm_params
Definition motion.h:301
OneDArray< TwoDArray< ValueType > * > m_dc
Definition motion.h:295
const OneDArray< float > & GlobalMotionParameters(const int ref_id) const
Get the global motion model parameters.
Definition motion.h:276
const PicturePredParams & GetPicPredParams() const
Return a reference to the local picture prediction params.
Definition motion.h:237
const TwoDArray< int > & SBSplit() const
Get the SB split level.
Definition motion.h:270
PicturePredParams & GetPicPredParams()
Return a reference to the local picture prediction params.
Definition motion.h:234
void InitMvData()
const MvArray & Vectors(const int ref_id) const
Get the MVs for a reference.
Definition motion.h:243
OneDArray< float > & GlobalMotionParameters(const int ref_id)
Get the global motion model parameters.
Definition motion.h:273
TwoDArray< int > & SBSplit()
Get the SB split level.
Definition motion.h:267
const TwoDArray< PredMode > & Mode() const
Get the block prediction modes.
Definition motion.h:264
float m_intra_block_ratio
Definition motion.h:408
TwoDArray< float > & SBCosts()
Get the SB costs.
Definition motion.h:350
const TwoDArray< MvCostData > & PredCosts(const int ref_id) const
Get the block cost structures for each reference.
Definition motion.h:335
float IntraBlockRatio() const
Get the proportion of intra blocks.
Definition motion.h:356
TwoDArray< int > & GlobalMotionInliers(const int ref_id)
Get the inliers for each reference.
Definition motion.h:371
OneDArray< TwoDArray< MvCostData > * > m_pred_costs
Definition motion.h:390
TwoDArray< float > m_lambda_map
Definition motion.h:402
void InitMEData()
friend std::ostream & operator<<(std::ostream &stream, MEData &me_data)
Overloaded operator<< for outputing to (file) stream.
const TwoDArray< float > & IntraCosts() const
Get the intra costs.
Definition motion.h:341
MEData(const PicturePredParams &predparams, const int num_refs=2)
Constructor.
TwoDArray< MvCostData > m_bipred_costs
Definition motion.h:396
const TwoDArray< MvCostData > & BiPredCosts() const
Get the bipred costs.
Definition motion.h:347
~MEData()
Destructor.
const TwoDArray< float > & SBCosts() const
Get the SB costs.
Definition motion.h:353
TwoDArray< float > m_intra_costs
Definition motion.h:393
TwoDArray< MvCostData > & PredCosts(const int ref_id)
Get the block cost structures for each reference.
Definition motion.h:332
TwoDArray< float > m_SB_costs
Definition motion.h:399
void SetIntraBlockRatio(const float r)
Set the intra block ratio.
Definition motion.h:359
const TwoDArray< int > & GlobalMotionInliers(const int ref_id) const
Get the inliers for each reference.
Definition motion.h:374
TwoDArray< MvCostData > & BiPredCosts()
Get the bipred costs.
Definition motion.h:344
void SetLambdaMap(const int num_refs, const float lambda)
Set up the lambda map by detecting motion discontinuities.
const TwoDArray< float > & LambdaMap() const
Get a lambda value for a given block and level.
Definition motion.h:368
void SetLambdaMap(const int level, const TwoDArray< float > &l_map, const float wt)
Set up the lambda map by averaging the lambda map from a lower level.
void FindTransitions(TwoDArray< bool > &trans_map, const int ref_num)
friend std::istream & operator>>(std::istream &stream, MEData &me_data)
Overloaded operator>> for input of data from (file) stream.
TwoDArray< float > & IntraCosts()
Get the intra costs.
Definition motion.h:338
void DropRef(int ref_index)
drop the data relating to one reference
OneDArray< TwoDArray< int > * > m_inliers
Definition motion.h:405

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