| 1 |
|
/*========================================================================= |
| 2 |
|
|
| 3 |
|
Program: Insight Segmentation & Registration Toolkit |
| 4 |
|
Module: $RCSfile: itkImageSource.txx.html,v $ |
| 5 |
|
Language: C++ |
| 6 |
|
Date: $Date: 2006/01/17 19:15:40 $ |
| 7 |
|
Version: $Revision: 1.4 $ |
| 8 |
|
|
| 9 |
|
Copyright (c) Insight Software Consortium. All rights reserved. |
| 10 |
|
See ITKCopyright.txt or http://www.itk.org/HTML/Copyright.htm for details. |
| 11 |
|
|
| 12 |
|
Portions of this code are covered under the VTK copyright. |
| 13 |
|
See VTKCopyright.txt or http://www.kitware.com/VTKCopyright.htm for details. |
| 14 |
|
|
| 15 |
|
This software is distributed WITHOUT ANY WARRANTY; without even |
| 16 |
|
the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR |
| 17 |
IND |
*****PURPOSE. See the above copyright notices for more information. |
| 18 |
|
|
| 19 |
|
=========================================================================*/ |
| 20 |
DEF |
#ifndef _itkImageSource_txx |
| 21 |
DEF |
#define _itkImageSource_txx |
| 22 |
|
#include "itkImageSource.h" |
| 23 |
|
|
| 24 |
|
#include "vnl/vnl_math.h" |
| 25 |
|
|
| 26 |
|
namespace itk |
| 27 |
|
{ |
| 28 |
|
|
| 29 |
|
/** |
| 30 |
|
* |
| 31 |
|
*/ |
| 32 |
|
template<class TOutputImage> |
| 33 |
|
ImageSource<TOutputImage> |
| 34 |
|
::ImageSource() |
| 35 |
|
{ |
| 36 |
|
// Create the output. We use static_cast<> here because we know the default |
| 37 |
|
// output must be of type TOutputImage |
| 38 |
|
typename TOutputImage::Pointer output |
| 39 |
IND |
****= static_cast<TOutputImage*>(this->MakeOutput(0).GetPointer()); |
| 40 |
|
this->ProcessObject::SetNumberOfRequiredOutputs(1); |
| 41 |
|
this->ProcessObject::SetNthOutput(0, output.GetPointer()); |
| 42 |
|
|
| 43 |
|
// Set the default behavior of an image source to NOT release its |
| 44 |
|
// output bulk data prior to GenerateData() in case that bulk data |
| 45 |
|
// can be reused (an thus avoid a costly deallocate/allocate cycle). |
| 46 |
|
this->ReleaseDataBeforeUpdateFlagOff(); |
| 47 |
|
} |
| 48 |
|
|
| 49 |
|
/** |
| 50 |
|
* |
| 51 |
|
*/ |
| 52 |
|
template<class TOutputImage> |
| 53 |
|
typename ImageSource<TOutputImage>::DataObjectPointer |
| 54 |
|
ImageSource<TOutputImage> |
| 55 |
|
::MakeOutput(unsigned int) |
| 56 |
|
{ |
| 57 |
|
return static_cast<DataObject*>(TOutputImage::New().GetPointer()); |
| 58 |
|
} |
| 59 |
|
|
| 60 |
|
/** |
| 61 |
|
* |
| 62 |
|
*/ |
| 63 |
|
template<class TOutputImage> |
| 64 |
|
typename ImageSource<TOutputImage>::OutputImageType * |
| 65 |
|
ImageSource<TOutputImage> |
| 66 |
|
::GetOutput() |
| 67 |
|
{ |
| 68 |
|
if (this->GetNumberOfOutputs() < 1) |
| 69 |
|
{ |
| 70 |
|
return 0; |
| 71 |
|
} |
| 72 |
|
|
| 73 |
|
return static_cast<TOutputImage*> |
| 74 |
IND |
****(this->ProcessObject::GetOutput(0)); |
| 75 |
|
} |
| 76 |
|
|
| 77 |
|
|
| 78 |
|
/** |
| 79 |
|
* |
| 80 |
|
*/ |
| 81 |
|
template<class TOutputImage> |
| 82 |
|
typename ImageSource<TOutputImage>::OutputImageType * |
| 83 |
|
ImageSource<TOutputImage> |
| 84 |
|
::GetOutput(unsigned int idx) |
| 85 |
|
{ |
| 86 |
|
return static_cast<TOutputImage*> |
| 87 |
IND |
****(this->ProcessObject::GetOutput(idx)); |
| 88 |
|
} |
| 89 |
|
|
| 90 |
|
|
| 91 |
EML |
|
| 92 |
EML |
|
| 93 |
|
/** |
| 94 |
|
* |
| 95 |
|
*/ |
| 96 |
|
template<class TOutputImage> |
| 97 |
|
void |
| 98 |
|
ImageSource<TOutputImage> |
| 99 |
|
::GraftOutput(DataObject *graft) |
| 100 |
|
{ |
| 101 |
|
this->GraftNthOutput(0, graft); |
| 102 |
|
} |
| 103 |
|
|
| 104 |
|
|
| 105 |
|
/** |
| 106 |
|
* |
| 107 |
|
*/ |
| 108 |
|
template<class TOutputImage> |
| 109 |
|
void |
| 110 |
|
ImageSource<TOutputImage> |
| 111 |
|
::GraftNthOutput(unsigned int idx, DataObject *graft) |
| 112 |
|
{ |
| 113 |
|
if ( idx >= this->GetNumberOfOutputs() ) |
| 114 |
|
{ |
| 115 |
|
itkExceptionMacro(<<"Requested to graft output " << idx << |
| 116 |
LEN |
" but this filter only has " << this->GetNumberOfOutputs() << " Outputs."); |
| 117 |
|
} |
| 118 |
|
|
| 119 |
|
if ( !graft ) |
| 120 |
|
{ |
| 121 |
|
itkExceptionMacro(<<"Requested to graft output that is a NULL pointer" ); |
| 122 |
|
} |
| 123 |
|
|
| 124 |
|
DataObject * output = this->GetOutput(idx); |
| 125 |
|
|
| 126 |
|
// Call GraftImage to copy meta-information, regions, and the pixel container |
| 127 |
|
output->Graft( graft ); |
| 128 |
|
} |
| 129 |
|
|
| 130 |
|
//---------------------------------------------------------------------------- |
| 131 |
|
template <class TOutputImage> |
| 132 |
|
int |
| 133 |
|
ImageSource<TOutputImage> |
| 134 |
|
::SplitRequestedRegion(int i, int num, OutputImageRegionType& splitRegion) |
| 135 |
|
{ |
| 136 |
|
// Get the output pointer |
| 137 |
|
OutputImageType * outputPtr = this->GetOutput(); |
| 138 |
|
const typename TOutputImage::SizeType& requestedRegionSize |
| 139 |
IND |
****= outputPtr->GetRequestedRegion().GetSize(); |
| 140 |
|
|
| 141 |
|
int splitAxis; |
| 142 |
|
typename TOutputImage::IndexType splitIndex; |
| 143 |
|
typename TOutputImage::SizeType splitSize; |
| 144 |
|
|
| 145 |
|
// Initialize the splitRegion to the output requested region |
| 146 |
|
splitRegion = outputPtr->GetRequestedRegion(); |
| 147 |
|
splitIndex = splitRegion.GetIndex(); |
| 148 |
|
splitSize = splitRegion.GetSize(); |
| 149 |
|
|
| 150 |
|
// split on the outermost dimension available |
| 151 |
|
splitAxis = outputPtr->GetImageDimension() - 1; |
| 152 |
|
while (requestedRegionSize[splitAxis] == 1) |
| 153 |
|
{ |
| 154 |
|
--splitAxis; |
| 155 |
|
if (splitAxis < 0) |
| 156 |
|
{ // cannot split |
| 157 |
|
itkDebugMacro(" Cannot Split"); |
| 158 |
|
return 1; |
| 159 |
|
} |
| 160 |
|
} |
| 161 |
|
|
| 162 |
|
// determine the actual number of pieces that will be generated |
| 163 |
LEN |
typename TOutputImage::SizeType::SizeValueType range = requestedRegionSize[splitAxis]; |
| 164 |
|
int valuesPerThread = (int)::ceil(range/(double)num); |
| 165 |
|
int maxThreadIdUsed = (int)::ceil(range/(double)valuesPerThread) - 1; |
| 166 |
|
|
| 167 |
|
// Split the region |
| 168 |
|
if (i < maxThreadIdUsed) |
| 169 |
|
{ |
| 170 |
|
splitIndex[splitAxis] += i*valuesPerThread; |
| 171 |
|
splitSize[splitAxis] = valuesPerThread; |
| 172 |
|
} |
| 173 |
|
if (i == maxThreadIdUsed) |
| 174 |
|
{ |
| 175 |
|
splitIndex[splitAxis] += i*valuesPerThread; |
| 176 |
|
// last thread needs to process the "rest" dimension being split |
| 177 |
|
splitSize[splitAxis] = splitSize[splitAxis] - i*valuesPerThread; |
| 178 |
|
} |
| 179 |
|
|
| 180 |
|
// set the split region ivars |
| 181 |
|
splitRegion.SetIndex( splitIndex ); |
| 182 |
|
splitRegion.SetSize( splitSize ); |
| 183 |
|
|
| 184 |
|
itkDebugMacro(" Split Piece: " << splitRegion ); |
| 185 |
|
|
| 186 |
|
return maxThreadIdUsed + 1; |
| 187 |
|
} |
| 188 |
|
|
| 189 |
|
//---------------------------------------------------------------------------- |
| 190 |
|
template <class TOutputImage> |
| 191 |
|
void |
| 192 |
|
ImageSource<TOutputImage> |
| 193 |
|
::AllocateOutputs() |
| 194 |
|
{ |
| 195 |
|
OutputImagePointer outputPtr; |
| 196 |
|
|
| 197 |
|
// Allocate the output memory |
| 198 |
|
for (unsigned int i=0; i < this->GetNumberOfOutputs(); i++) |
| 199 |
|
{ |
| 200 |
|
outputPtr = this->GetOutput(i); |
| 201 |
|
outputPtr->SetBufferedRegion(outputPtr->GetRequestedRegion()); |
| 202 |
|
outputPtr->Allocate(); |
| 203 |
|
} |
| 204 |
|
} |
| 205 |
|
|
| 206 |
|
//---------------------------------------------------------------------------- |
| 207 |
|
template <class TOutputImage> |
| 208 |
|
void |
| 209 |
|
ImageSource<TOutputImage> |
| 210 |
|
::GenerateData() |
| 211 |
|
{ |
| 212 |
|
// Call a method that can be overriden by a subclass to allocate |
| 213 |
|
// memory for the filter's outputs |
| 214 |
|
this->AllocateOutputs(); |
| 215 |
|
|
| 216 |
|
// Call a method that can be overridden by a subclass to perform |
| 217 |
|
// some calculations prior to splitting the main computations into |
| 218 |
|
// separate threads |
| 219 |
|
this->BeforeThreadedGenerateData(); |
| 220 |
|
|
| 221 |
|
// Set up the multithreaded processing |
| 222 |
|
ThreadStruct str; |
| 223 |
|
str.Filter = this; |
| 224 |
|
|
| 225 |
|
this->GetMultiThreader()->SetNumberOfThreads(this->GetNumberOfThreads()); |
| 226 |
|
this->GetMultiThreader()->SetSingleMethod(this->ThreaderCallback, &str); |
| 227 |
|
|
| 228 |
|
// multithread the execution |
| 229 |
|
this->GetMultiThreader()->SingleMethodExecute(); |
| 230 |
|
|
| 231 |
|
// Call a method that can be overridden by a subclass to perform |
| 232 |
|
// some calculations after all the threads have completed |
| 233 |
|
this->AfterThreadedGenerateData(); |
| 234 |
|
|
| 235 |
|
} |
| 236 |
|
|
| 237 |
|
|
| 238 |
|
//---------------------------------------------------------------------------- |
| 239 |
|
// The execute method created by the subclass. |
| 240 |
|
template <class TOutputImage> |
| 241 |
|
void |
| 242 |
|
ImageSource<TOutputImage> |
| 243 |
|
::ThreadedGenerateData(const OutputImageRegionType&, |
| 244 |
|
int) |
| 245 |
|
{ |
| 246 |
|
itkExceptionMacro("subclass should override this method!!!"); |
| 247 |
|
} |
| 248 |
|
|
| 249 |
|
// Callback routine used by the threading library. This routine just calls |
| 250 |
|
// the ThreadedGenerateData method after setting the correct region for this |
| 251 |
|
// thread. |
| 252 |
|
template <class TOutputImage> |
| 253 |
|
ITK_THREAD_RETURN_TYPE |
| 254 |
|
ImageSource<TOutputImage> |
| 255 |
|
::ThreaderCallback( void *arg ) |
| 256 |
|
{ |
| 257 |
|
ThreadStruct *str; |
| 258 |
|
int total, threadId, threadCount; |
| 259 |
|
|
| 260 |
|
threadId = ((MultiThreader::ThreadInfoStruct *)(arg))->ThreadID; |
| 261 |
|
threadCount = ((MultiThreader::ThreadInfoStruct *)(arg))->NumberOfThreads; |
| 262 |
|
|
| 263 |
|
str = (ThreadStruct *)(((MultiThreader::ThreadInfoStruct *)(arg))->UserData); |
| 264 |
|
|
| 265 |
|
// execute the actual method with appropriate output region |
| 266 |
|
// first find out how many pieces extent can be split into. |
| 267 |
|
typename TOutputImage::RegionType splitRegion; |
| 268 |
|
total = str->Filter->SplitRequestedRegion(threadId, threadCount, |
| 269 |
|
splitRegion); |
| 270 |
|
|
| 271 |
|
if (threadId < total) |
| 272 |
|
{ |
| 273 |
|
str->Filter->ThreadedGenerateData(splitRegion, threadId); |
| 274 |
|
} |
| 275 |
|
// else |
| 276 |
|
// { |
| 277 |
IND |
**// otherwise don't use this thread. Sometimes the threads dont |
| 278 |
IND |
**// break up very well and it is just as efficient to leave a |
| 279 |
IND |
**// few threads idle. |
| 280 |
IND |
**// } |
| 281 |
|
|
| 282 |
|
return ITK_THREAD_RETURN_VALUE; |
| 283 |
|
} |
| 284 |
|
|
| 285 |
|
|
| 286 |
|
} // end namespace itk |
| 287 |
|
|
| 288 |
|
#endif |
| 289 |
|
|