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| 1 /* | 1 /* |
| 2 * Copyright (c) 2014 The WebRTC project authors. All Rights Reserved. | 2 * Copyright (c) 2014 The WebRTC project authors. All Rights Reserved. |
| 3 * | 3 * |
| 4 * Use of this source code is governed by a BSD-style license | 4 * Use of this source code is governed by a BSD-style license |
| 5 * that can be found in the LICENSE file in the root of the source | 5 * that can be found in the LICENSE file in the root of the source |
| 6 * tree. An additional intellectual property rights grant can be found | 6 * tree. An additional intellectual property rights grant can be found |
| 7 * in the file PATENTS. All contributing project authors may | 7 * in the file PATENTS. All contributing project authors may |
| 8 * be found in the AUTHORS file in the root of the source tree. | 8 * be found in the AUTHORS file in the root of the source tree. |
| 9 */ | 9 */ |
| 10 | 10 |
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| 59 int num_input_channels, | 59 int num_input_channels, |
| 60 size_t num_freq_bins, | 60 size_t num_freq_bins, |
| 61 int num_output_channels, | 61 int num_output_channels, |
| 62 complex<float>* const* output) override; | 62 complex<float>* const* output) override; |
| 63 | 63 |
| 64 private: | 64 private: |
| 65 typedef Matrix<float> MatrixF; | 65 typedef Matrix<float> MatrixF; |
| 66 typedef ComplexMatrix<float> ComplexMatrixF; | 66 typedef ComplexMatrix<float> ComplexMatrixF; |
| 67 typedef complex<float> complex_f; | 67 typedef complex<float> complex_f; |
| 68 | 68 |
| 69 void InitFrequencyCorrectionRanges(); |
| 69 void InitInterfAngles(); | 70 void InitInterfAngles(); |
| 70 void InitDelaySumMasks(); | 71 void InitDelaySumMasks(); |
| 71 void InitTargetCovMats(); | 72 void InitTargetCovMats(); |
| 72 void InitInterfCovMats(); | 73 void InitInterfCovMats(); |
| 73 | 74 |
| 74 // Calculates postfilter masks that minimize the mean squared error of our | 75 // Calculates postfilter masks that minimize the mean squared error of our |
| 75 // estimation of the desired signal. | 76 // estimation of the desired signal. |
| 76 float CalculatePostfilterMask(const ComplexMatrixF& interf_cov_mat, | 77 float CalculatePostfilterMask(const ComplexMatrixF& interf_cov_mat, |
| 77 float rpsiw, | 78 float rpsiw, |
| 78 float ratio_rxiw_rxim, | 79 float ratio_rxiw_rxim, |
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| 168 // Number of blocks after which the data is considered interference if the | 169 // Number of blocks after which the data is considered interference if the |
| 169 // mask does not pass |kMaskSignalThreshold|. | 170 // mask does not pass |kMaskSignalThreshold|. |
| 170 size_t hold_target_blocks_; | 171 size_t hold_target_blocks_; |
| 171 // Number of blocks since the last mask that passed |kMaskSignalThreshold|. | 172 // Number of blocks since the last mask that passed |kMaskSignalThreshold|. |
| 172 size_t interference_blocks_count_; | 173 size_t interference_blocks_count_; |
| 173 }; | 174 }; |
| 174 | 175 |
| 175 } // namespace webrtc | 176 } // namespace webrtc |
| 176 | 177 |
| 177 #endif // WEBRTC_MODULES_AUDIO_PROCESSING_BEAMFORMER_NONLINEAR_BEAMFORMER_H_ | 178 #endif // WEBRTC_MODULES_AUDIO_PROCESSING_BEAMFORMER_NONLINEAR_BEAMFORMER_H_ |
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