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/*
* Copyright (c) 2014 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
#ifndef WEBRTC_MODULES_AUDIO_PROCESSING_BEAMFORMER_COMPLEX_MATRIX_H_
#define WEBRTC_MODULES_AUDIO_PROCESSING_BEAMFORMER_COMPLEX_MATRIX_H_
#include <complex>
#include "webrtc/base/checks.h"
#include "webrtc/base/scoped_ptr.h"
#include "webrtc/modules/audio_processing/beamformer/matrix.h"
namespace webrtc {
using std::complex;
// An extension of Matrix for operations that only work on a complex type.
template <typename T>
class ComplexMatrix : public Matrix<complex<T> > {
public:
ComplexMatrix() : Matrix<complex<T> >() {}
ComplexMatrix(int num_rows, int num_columns)
: Matrix<complex<T> >(num_rows, num_columns) {}
ComplexMatrix(const complex<T>* data, int num_rows, int num_columns)
: Matrix<complex<T> >(data, num_rows, num_columns) {}
// Complex Matrix operations.
ComplexMatrix& PointwiseConjugate() {
complex<T>* const data = this->data();
size_t size = this->num_rows() * this->num_columns();
for (size_t i = 0; i < size; ++i) {
data[i] = conj(data[i]);
}
return *this;
}
ComplexMatrix& PointwiseConjugate(const ComplexMatrix& operand) {
this->CopyFrom(operand);
return PointwiseConjugate();
}
ComplexMatrix& ConjugateTranspose() {
this->CopyDataToScratch();
int num_rows = this->num_rows();
this->SetNumRows(this->num_columns());
this->SetNumColumns(num_rows);
this->Resize();
return ConjugateTranspose(this->scratch_elements());
}
ComplexMatrix& ConjugateTranspose(const ComplexMatrix& operand) {
RTC_CHECK_EQ(operand.num_rows(), this->num_columns());
RTC_CHECK_EQ(operand.num_columns(), this->num_rows());
return ConjugateTranspose(operand.elements());
}
ComplexMatrix& ZeroImag() {
complex<T>* const data = this->data();
size_t size = this->num_rows() * this->num_columns();
for (size_t i = 0; i < size; ++i) {
data[i] = complex<T>(data[i].real(), 0);
}
return *this;
}
ComplexMatrix& ZeroImag(const ComplexMatrix& operand) {
this->CopyFrom(operand);
return ZeroImag();
}
private:
ComplexMatrix& ConjugateTranspose(const complex<T>* const* src) {
complex<T>* const* elements = this->elements();
for (int i = 0; i < this->num_rows(); ++i) {
for (int j = 0; j < this->num_columns(); ++j) {
elements[i][j] = conj(src[j][i]);
}
}
return *this;
}
};
} // namespace webrtc
#endif // WEBRTC_MODULES_AUDIO_PROCESSING_BEAMFORMER_COMPLEX_MATRIX_H_
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