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1 /* | 1 /* |
2 * Copyright (c) 2013 The WebRTC project authors. All Rights Reserved. | 2 * Copyright (c) 2013 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 |
11 #ifndef WEBRTC_MODULES_AUDIO_PROCESSING_TRANSIENT_TRANSIENT_DETECTOR_H_ | 11 #ifndef WEBRTC_MODULES_AUDIO_PROCESSING_TRANSIENT_TRANSIENT_DETECTOR_H_ |
12 #define WEBRTC_MODULES_AUDIO_PROCESSING_TRANSIENT_TRANSIENT_DETECTOR_H_ | 12 #define WEBRTC_MODULES_AUDIO_PROCESSING_TRANSIENT_TRANSIENT_DETECTOR_H_ |
13 | 13 |
14 #include <deque> | 14 #include <deque> |
| 15 #include <memory> |
15 | 16 |
16 #include "webrtc/base/scoped_ptr.h" | |
17 #include "webrtc/modules/audio_processing/transient/moving_moments.h" | 17 #include "webrtc/modules/audio_processing/transient/moving_moments.h" |
18 #include "webrtc/modules/audio_processing/transient/wpd_tree.h" | 18 #include "webrtc/modules/audio_processing/transient/wpd_tree.h" |
19 | 19 |
20 namespace webrtc { | 20 namespace webrtc { |
21 | 21 |
22 // This is an implementation of the transient detector described in "Causal | 22 // This is an implementation of the transient detector described in "Causal |
23 // Wavelet based transient detector". | 23 // Wavelet based transient detector". |
24 // Calculates the log-likelihood of a transient to happen on a signal at any | 24 // Calculates the log-likelihood of a transient to happen on a signal at any |
25 // given time based on the previous samples; it uses a WPD tree to analyze the | 25 // given time based on the previous samples; it uses a WPD tree to analyze the |
26 // signal. It preserves its state, so it can be multiple-called. | 26 // signal. It preserves its state, so it can be multiple-called. |
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48 bool using_reference() { return using_reference_; } | 48 bool using_reference() { return using_reference_; } |
49 | 49 |
50 private: | 50 private: |
51 float ReferenceDetectionValue(const float* data, size_t length); | 51 float ReferenceDetectionValue(const float* data, size_t length); |
52 | 52 |
53 static const size_t kLevels = 3; | 53 static const size_t kLevels = 3; |
54 static const size_t kLeaves = 1 << kLevels; | 54 static const size_t kLeaves = 1 << kLevels; |
55 | 55 |
56 size_t samples_per_chunk_; | 56 size_t samples_per_chunk_; |
57 | 57 |
58 rtc::scoped_ptr<WPDTree> wpd_tree_; | 58 std::unique_ptr<WPDTree> wpd_tree_; |
59 size_t tree_leaves_data_length_; | 59 size_t tree_leaves_data_length_; |
60 | 60 |
61 // A MovingMoments object is needed for each leaf in the WPD tree. | 61 // A MovingMoments object is needed for each leaf in the WPD tree. |
62 rtc::scoped_ptr<MovingMoments> moving_moments_[kLeaves]; | 62 std::unique_ptr<MovingMoments> moving_moments_[kLeaves]; |
63 | 63 |
64 rtc::scoped_ptr<float[]> first_moments_; | 64 std::unique_ptr<float[]> first_moments_; |
65 rtc::scoped_ptr<float[]> second_moments_; | 65 std::unique_ptr<float[]> second_moments_; |
66 | 66 |
67 // Stores the last calculated moments from the previous detection. | 67 // Stores the last calculated moments from the previous detection. |
68 float last_first_moment_[kLeaves]; | 68 float last_first_moment_[kLeaves]; |
69 float last_second_moment_[kLeaves]; | 69 float last_second_moment_[kLeaves]; |
70 | 70 |
71 // We keep track of the previous results from the previous chunks, so it can | 71 // We keep track of the previous results from the previous chunks, so it can |
72 // be used to effectively give results according to the |transient_length|. | 72 // be used to effectively give results according to the |transient_length|. |
73 std::deque<float> previous_results_; | 73 std::deque<float> previous_results_; |
74 | 74 |
75 // Number of chunks that are going to return only zeros at the beginning of | 75 // Number of chunks that are going to return only zeros at the beginning of |
76 // the detection. It helps to avoid infs and nans due to the lack of | 76 // the detection. It helps to avoid infs and nans due to the lack of |
77 // information. | 77 // information. |
78 int chunks_at_startup_left_to_delete_; | 78 int chunks_at_startup_left_to_delete_; |
79 | 79 |
80 float reference_energy_; | 80 float reference_energy_; |
81 | 81 |
82 bool using_reference_; | 82 bool using_reference_; |
83 }; | 83 }; |
84 | 84 |
85 } // namespace webrtc | 85 } // namespace webrtc |
86 | 86 |
87 #endif // WEBRTC_MODULES_AUDIO_PROCESSING_TRANSIENT_TRANSIENT_DETECTOR_H_ | 87 #endif // WEBRTC_MODULES_AUDIO_PROCESSING_TRANSIENT_TRANSIENT_DETECTOR_H_ |
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