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92ea95e34a
In https://webrtc-review.googlesource.com/c/src/+/1560 we moved WebRTC from src/webrtc to src/ (in order to preserve an healthy git history). This CL takes care of fixing header guards, #include paths, etc... NOPRESUBMIT=true NOTREECHECKS=true NOTRY=true TBR=tommi@webrtc.org Bug: chromium:611808 Change-Id: Iea91618212bee0af16aa3f05071eab8f93706578 Reviewed-on: https://webrtc-review.googlesource.com/1561 Reviewed-by: Mirko Bonadei <mbonadei@webrtc.org> Reviewed-by: Henrik Kjellander <kjellander@webrtc.org> Commit-Queue: Mirko Bonadei <mbonadei@webrtc.org> Cr-Commit-Position: refs/heads/master@{#19846}
54 lines
2.4 KiB
C++
54 lines
2.4 KiB
C++
/*
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* Copyright (c) 2014 The WebRTC project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#ifndef MODULES_AUDIO_PROCESSING_BEAMFORMER_COVARIANCE_MATRIX_GENERATOR_H_
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#define MODULES_AUDIO_PROCESSING_BEAMFORMER_COVARIANCE_MATRIX_GENERATOR_H_
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#include "modules/audio_processing/beamformer/complex_matrix.h"
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#include "modules/audio_processing/beamformer/array_util.h"
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namespace webrtc {
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// Helper class for Beamformer in charge of generating covariance matrices. For
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// each function, the passed-in ComplexMatrix is expected to be of size
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// |num_input_channels| x |num_input_channels|.
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class CovarianceMatrixGenerator {
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public:
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// A uniform covariance matrix with a gap at the target location. WARNING:
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// The target angle is assumed to be 0.
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static void UniformCovarianceMatrix(float wave_number,
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const std::vector<Point>& geometry,
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ComplexMatrix<float>* mat);
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// The covariance matrix of a source at the given angle.
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static void AngledCovarianceMatrix(float sound_speed,
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float angle,
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size_t frequency_bin,
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size_t fft_size,
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size_t num_freq_bins,
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int sample_rate,
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const std::vector<Point>& geometry,
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ComplexMatrix<float>* mat);
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// Calculates phase shifts that, when applied to a multichannel signal and
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// added together, cause constructive interferernce for sources located at
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// the given angle.
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static void PhaseAlignmentMasks(size_t frequency_bin,
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size_t fft_size,
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int sample_rate,
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float sound_speed,
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const std::vector<Point>& geometry,
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float angle,
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ComplexMatrix<float>* mat);
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};
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} // namespace webrtc
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#endif // MODULES_AUDIO_PROCESSING_BEAMFORMER_BF_HELPERS_H_
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