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| 1 /* |
| 2 * Copyright (c) 2011 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_VOICE_ENGINE_AUDIO_LEVEL_H_ |
| 12 #define WEBRTC_VOICE_ENGINE_AUDIO_LEVEL_H_ |
| 13 |
| 14 #include "webrtc/base/criticalsection.h" |
| 15 #include "webrtc/typedefs.h" |
| 16 |
| 17 namespace webrtc { |
| 18 |
| 19 class AudioFrame; |
| 20 namespace voe { |
| 21 |
| 22 class AudioLevel { |
| 23 public: |
| 24 AudioLevel(); |
| 25 ~AudioLevel(); |
| 26 |
| 27 // Called on "API thread(s)" from APIs like VoEBase::CreateChannel(), |
| 28 // VoEBase::StopSend(), VoEVolumeControl::GetSpeechOutputLevel(). |
| 29 int8_t Level() const; |
| 30 int16_t LevelFullRange() const; |
| 31 void Clear(); |
| 32 |
| 33 // Called on a native capture audio thread (platform dependent) from the |
| 34 // AudioTransport::RecordedDataIsAvailable() callback. |
| 35 // In Chrome, this method is called on the AudioInputDevice thread. |
| 36 void ComputeLevel(const AudioFrame& audioFrame); |
| 37 |
| 38 private: |
| 39 enum { kUpdateFrequency = 10 }; |
| 40 |
| 41 rtc::CriticalSection crit_sect_; |
| 42 |
| 43 int16_t abs_max_; |
| 44 int16_t count_; |
| 45 int8_t current_level_; |
| 46 int16_t current_level_full_range_; |
| 47 }; |
| 48 |
| 49 } // namespace voe |
| 50 } // namespace webrtc |
| 51 |
| 52 #endif // WEBRTC_VOICE_ENGINE_AUDIO_LEVEL_H_ |
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