1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
|
/*=========================================================================
*
* Copyright Insight Software Consortium
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0.txt
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*=========================================================================*/
#ifndef itkFFTWHalfHermitianToRealInverseFFTImageFilter_hxx
#define itkFFTWHalfHermitianToRealInverseFFTImageFilter_hxx
#include "itkFFTWHalfHermitianToRealInverseFFTImageFilter.h"
#include "itkHalfHermitianToRealInverseFFTImageFilter.hxx"
#include "itkImageRegionIterator.h"
#include "itkProgressReporter.h"
namespace itk
{
template< typename TInputImage, typename TOutputImage >
FFTWHalfHermitianToRealInverseFFTImageFilter< TInputImage, TOutputImage >
::FFTWHalfHermitianToRealInverseFFTImageFilter()
{
m_PlanRigor = FFTWGlobalConfiguration::GetPlanRigor();
}
template< typename TInputImage, typename TOutputImage >
void
FFTWHalfHermitianToRealInverseFFTImageFilter< TInputImage, TOutputImage >
::BeforeThreadedGenerateData()
{
// Get pointers to the input and output.
typename InputImageType::ConstPointer inputPtr = this->GetInput();
typename OutputImageType::Pointer outputPtr = this->GetOutput();
if ( !inputPtr || !outputPtr )
{
return;
}
// We don't have a nice progress to report, but at least this simple line
// reports the beginning and the end of the process.
ProgressReporter progress( this, 0, 1 );
// Allocate output buffer memory.
outputPtr->SetBufferedRegion( outputPtr->GetRequestedRegion() );
outputPtr->Allocate();
const InputSizeType inputSize = inputPtr->GetLargestPossibleRegion().GetSize();
const OutputSizeType outputSize = outputPtr->GetLargestPossibleRegion().GetSize();
// Figure out sizes.
// Size of input and output aren't the same which is handled in the superclass,
// sort of.
// The input size and output size only differ in the fastest moving dimension.
unsigned int totalOutputSize = 1;
unsigned int totalInputSize = 1;
for ( unsigned i = 0; i < ImageDimension; i++ )
{
totalOutputSize *= outputSize[i];
totalInputSize *= inputSize[i];
}
typename FFTWProxyType::ComplexType * in;
// The complex-to-real transform doesn't support the
// FFTW_PRESERVE_INPUT flag at this time. So if the input can't be
// destroyed, we have to copy the input data to a buffer before
// running the IFFT.
if( m_CanUseDestructiveAlgorithm )
{
// Ok, so lets use the input buffer directly, to save some memory.
in = (typename FFTWProxyType::ComplexType*)inputPtr->GetBufferPointer();
}
else
{
// We must use a buffer where fftw can work and destroy what it wants.
in = new typename FFTWProxyType::ComplexType[totalInputSize];
}
OutputPixelType * out = outputPtr->GetBufferPointer();
typename FFTWProxyType::PlanType plan;
int sizes[ImageDimension];
for( unsigned int i = 0; i < ImageDimension; i++ )
{
sizes[(ImageDimension - 1) - i] = outputSize[i];
}
plan = FFTWProxyType::Plan_dft_c2r( ImageDimension, sizes, in, out, m_PlanRigor,
this->GetNumberOfThreads(),
!m_CanUseDestructiveAlgorithm );
if( !m_CanUseDestructiveAlgorithm )
{
// complex<double> and double[2] types are compatible memory layouts.
// The reinterpret_cast is used here to
// make the "C" fftw libary compatible with the c++ complex<double>.
std::copy( inputPtr->GetBufferPointer(),
inputPtr->GetBufferPointer()+totalInputSize,
reinterpret_cast< typename InputImageType::PixelType * > (in) );
}
FFTWProxyType::Execute( plan );
// Some cleanup.
FFTWProxyType::DestroyPlan( plan );
if( !m_CanUseDestructiveAlgorithm )
{
delete[] in;
}
}
template <typename TInputImage, typename TOutputImage>
void
FFTWHalfHermitianToRealInverseFFTImageFilter< TInputImage, TOutputImage >
::ThreadedGenerateData(const OutputRegionType& outputRegionForThread,
ThreadIdType itkNotUsed(threadId) )
{
typedef ImageRegionIterator< OutputImageType > IteratorType;
unsigned long totalOutputSize = this->GetOutput()->GetRequestedRegion().GetNumberOfPixels();
IteratorType it( this->GetOutput(), outputRegionForThread );
while( !it.IsAtEnd() )
{
it.Set( it.Value() / totalOutputSize );
++it;
}
}
template< typename TInputImage, typename TOutputImage >
void
FFTWHalfHermitianToRealInverseFFTImageFilter< TInputImage, TOutputImage >
::UpdateOutputData(DataObject * output)
{
// We need to catch that information now, because it is changed
// later during the pipeline execution, and thus can't be grabbed in
// GenerateData().
m_CanUseDestructiveAlgorithm = this->GetInput()->GetReleaseDataFlag();
Superclass::UpdateOutputData( output );
}
template< typename TInputImage, typename TOutputImage >
void
FFTWHalfHermitianToRealInverseFFTImageFilter< TInputImage, TOutputImage >
::PrintSelf(std::ostream & os, Indent indent) const
{
Superclass::PrintSelf( os, indent );
os << indent << "PlanRigor: " << FFTWGlobalConfiguration::GetPlanRigorName( m_PlanRigor )
<< " (" << m_PlanRigor << ")" << std::endl;
}
template< typename TInputImage, typename TOutputImage >
SizeValueType
FFTWHalfHermitianToRealInverseFFTImageFilter< TInputImage, TOutputImage >
::GetSizeGreatestPrimeFactor() const
{
return FFTWProxyType::GREATEST_PRIME_FACTOR;
}
} // namespace itk
#endif // _itkFFTWHalfHermitianToRealInverseFFTImageFilter_hxx
|
