OLD | NEW |
1 /* | 1 /* |
2 * Copyright (c) 2015 The WebRTC project authors. All Rights Reserved. | 2 * Copyright (c) 2015 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 |
(...skipping 19 matching lines...) Expand all Loading... |
30 : last_voice_probability_(kDefaultVoiceValue), | 30 : last_voice_probability_(kDefaultVoiceValue), |
31 standalone_vad_(StandaloneVad::Create()) { | 31 standalone_vad_(StandaloneVad::Create()) { |
32 } | 32 } |
33 | 33 |
34 // Because ISAC has a different chunk length, it updates | 34 // Because ISAC has a different chunk length, it updates |
35 // |chunkwise_voice_probabilities_| and |chunkwise_rms_| when there is new data. | 35 // |chunkwise_voice_probabilities_| and |chunkwise_rms_| when there is new data. |
36 // Otherwise it clears them. | 36 // Otherwise it clears them. |
37 void VoiceActivityDetector::ProcessChunk(const int16_t* audio, | 37 void VoiceActivityDetector::ProcessChunk(const int16_t* audio, |
38 size_t length, | 38 size_t length, |
39 int sample_rate_hz) { | 39 int sample_rate_hz) { |
40 DCHECK_EQ(static_cast<int>(length), sample_rate_hz / 100); | 40 RTC_DCHECK_EQ(static_cast<int>(length), sample_rate_hz / 100); |
41 DCHECK_LE(length, kMaxLength); | 41 RTC_DCHECK_LE(length, kMaxLength); |
42 // Resample to the required rate. | 42 // Resample to the required rate. |
43 const int16_t* resampled_ptr = audio; | 43 const int16_t* resampled_ptr = audio; |
44 if (sample_rate_hz != kSampleRateHz) { | 44 if (sample_rate_hz != kSampleRateHz) { |
45 CHECK_EQ( | 45 RTC_CHECK_EQ( |
46 resampler_.ResetIfNeeded(sample_rate_hz, kSampleRateHz, kNumChannels), | 46 resampler_.ResetIfNeeded(sample_rate_hz, kSampleRateHz, kNumChannels), |
47 0); | 47 0); |
48 resampler_.Push(audio, length, resampled_, kLength10Ms, length); | 48 resampler_.Push(audio, length, resampled_, kLength10Ms, length); |
49 resampled_ptr = resampled_; | 49 resampled_ptr = resampled_; |
50 } | 50 } |
51 DCHECK_EQ(length, kLength10Ms); | 51 RTC_DCHECK_EQ(length, kLength10Ms); |
52 | 52 |
53 // Each chunk needs to be passed into |standalone_vad_|, because internally it | 53 // Each chunk needs to be passed into |standalone_vad_|, because internally it |
54 // buffers the audio and processes it all at once when GetActivity() is | 54 // buffers the audio and processes it all at once when GetActivity() is |
55 // called. | 55 // called. |
56 CHECK_EQ(standalone_vad_->AddAudio(resampled_ptr, length), 0); | 56 RTC_CHECK_EQ(standalone_vad_->AddAudio(resampled_ptr, length), 0); |
57 | 57 |
58 audio_processing_.ExtractFeatures(resampled_ptr, length, &features_); | 58 audio_processing_.ExtractFeatures(resampled_ptr, length, &features_); |
59 | 59 |
60 chunkwise_voice_probabilities_.resize(features_.num_frames); | 60 chunkwise_voice_probabilities_.resize(features_.num_frames); |
61 chunkwise_rms_.resize(features_.num_frames); | 61 chunkwise_rms_.resize(features_.num_frames); |
62 std::copy(features_.rms, features_.rms + chunkwise_rms_.size(), | 62 std::copy(features_.rms, features_.rms + chunkwise_rms_.size(), |
63 chunkwise_rms_.begin()); | 63 chunkwise_rms_.begin()); |
64 if (features_.num_frames > 0) { | 64 if (features_.num_frames > 0) { |
65 if (features_.silence) { | 65 if (features_.silence) { |
66 // The other features are invalid, so set the voice probabilities to an | 66 // The other features are invalid, so set the voice probabilities to an |
67 // arbitrary low value. | 67 // arbitrary low value. |
68 std::fill(chunkwise_voice_probabilities_.begin(), | 68 std::fill(chunkwise_voice_probabilities_.begin(), |
69 chunkwise_voice_probabilities_.end(), kLowProbability); | 69 chunkwise_voice_probabilities_.end(), kLowProbability); |
70 } else { | 70 } else { |
71 std::fill(chunkwise_voice_probabilities_.begin(), | 71 std::fill(chunkwise_voice_probabilities_.begin(), |
72 chunkwise_voice_probabilities_.end(), kNeutralProbability); | 72 chunkwise_voice_probabilities_.end(), kNeutralProbability); |
73 CHECK_GE( | 73 RTC_CHECK_GE( |
74 standalone_vad_->GetActivity(&chunkwise_voice_probabilities_[0], | 74 standalone_vad_->GetActivity(&chunkwise_voice_probabilities_[0], |
75 chunkwise_voice_probabilities_.size()), | 75 chunkwise_voice_probabilities_.size()), |
76 0); | 76 0); |
77 CHECK_GE(pitch_based_vad_.VoicingProbability( | 77 RTC_CHECK_GE(pitch_based_vad_.VoicingProbability( |
78 features_, &chunkwise_voice_probabilities_[0]), | 78 features_, &chunkwise_voice_probabilities_[0]), |
79 0); | 79 0); |
80 } | 80 } |
81 last_voice_probability_ = chunkwise_voice_probabilities_.back(); | 81 last_voice_probability_ = chunkwise_voice_probabilities_.back(); |
82 } | 82 } |
83 } | 83 } |
84 | 84 |
85 } // namespace webrtc | 85 } // namespace webrtc |
OLD | NEW |