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1 /* | |
Andrew MacDonald
2015/06/15 04:32:25
After all reviewers have LGTM'd, please run git cl
aluebs-webrtc
2015/06/16 01:17:52
Acknowledged.
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2 * Copyright (c) 2015 The WebRTC project authors. All Rights Reserved. | |
3 * | |
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 | |
6 * tree. An additional intellectual property rights grant can be found | |
7 * in the file PATENTS. All contributing project authors may | |
8 * be found in the AUTHORS file in the root of the source tree. | |
9 */ | |
10 | |
11 #ifndef WEBRTC_MODULES_AUDIO_PROCESSING_VAD_VOICE_ACTIVITY_DETECTOR_H_ | |
12 #define WEBRTC_MODULES_AUDIO_PROCESSING_VAD_VOICE_ACTIVITY_DETECTOR_H_ | |
13 | |
14 #include <vector> | |
15 | |
16 #include "webrtc/base/scoped_ptr.h" | |
17 #include "webrtc/common_audio/resampler/include/resampler.h" | |
18 #include "webrtc/modules/audio_processing/vad/vad_audio_proc.h" | |
19 #include "webrtc/modules/audio_processing/vad/common.h" | |
20 #include "webrtc/modules/audio_processing/vad/pitch_based_vad.h" | |
21 #include "webrtc/modules/audio_processing/vad/standalone_vad.h" | |
22 | |
23 namespace webrtc { | |
24 | |
25 // A Voice Activity Detector (VAD) that combines the voice probability from the | |
26 // StandaloneVad and PitchBasedVad to get a more robust estimation. | |
27 class VoiceActivityDetector { | |
28 public: | |
29 VoiceActivityDetector(); | |
30 | |
31 // Processes each capture audio chunk and estimates the voice probability. The | |
32 // maximum supported sample rate is 32kHz. | |
33 void ProcessCaptureAudio(const int16_t* audio, int length); | |
Andrew MacDonald
2015/06/15 04:32:25
Perhaps ProcessChunk instead? It doesn't have to b
aluebs-webrtc
2015/06/16 01:17:53
Good point! Done.
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34 | |
35 // Because ISAC has a different chunk length, it returns a zero size vector | |
Andrew MacDonald
2015/06/15 04:32:25
This is an implementation detail; you could put it
aluebs-webrtc
2015/06/16 01:17:52
Done.
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36 // every time there is no new data and then return a few chunk's data at once. | |
bloch
2015/06/12 23:34:38
I'm thinking about what we discussed; I think I (p
aluebs-webrtc
2015/06/16 01:17:52
It will not have identical values. As you point ou
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37 std::vector<double> chunkwise_voice_probabilities() const { | |
38 return chunkwise_voice_probabilities_; | |
Andrew MacDonald
2015/06/15 04:32:26
Since this is called on every chunk, you don't wan
aluebs-webrtc
2015/06/16 01:17:52
Done.
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39 } | |
40 std::vector<double> chunkwise_rms() const { return chunkwise_rms_; } | |
Andrew MacDonald
2015/06/15 04:32:25
As above, return a const reference.
aluebs-webrtc
2015/06/16 01:17:52
Done.
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41 | |
42 // Returns the last voice probability, regardless of the internal | |
43 // implementation, although it has a few chunks of delay. | |
44 float last_voice_probability() const { return last_voice_probability_; } | |
Andrew MacDonald
2015/06/15 04:32:25
Should definitely convert things to float later gi
aluebs-webrtc
2015/06/16 01:17:53
Fixed this inconsistency in this CL, since it make
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45 | |
46 private: | |
47 std::vector<double> chunkwise_voice_probabilities_; | |
48 std::vector<double> chunkwise_rms_; | |
49 | |
50 double last_voice_probability_; | |
bloch
2015/06/12 23:34:38
I know you're just refactoring old code, but is th
Andrew MacDonald
2015/06/15 04:32:26
Agreed, I'm sure these could be floats. However it
aluebs-webrtc
2015/06/16 01:17:52
Yes, I can do this in a follow up CL. But I change
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51 | |
52 Resampler resampler_; | |
53 VadAudioProc audio_processing_; | |
54 | |
55 rtc::scoped_ptr<StandaloneVad> standalone_vad_; | |
56 PitchBasedVad pitch_based_vad_; | |
57 | |
58 int16_t resampled_[kLength10Ms]; | |
59 AudioFeatures features_; | |
60 }; | |
61 | |
62 } // namespace webrtc | |
63 | |
64 #endif // WEBRTC_MODULES_AUDIO_PROCESSING_VAD_VOICE_ACTIVITY_DETECTOR_H_ | |
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