| /* |
| * Copyright (c) 2011 The WebRTC project authors. All Rights Reserved. |
| * |
| * Use of this source code is governed by a BSD-style license |
| * that can be found in the LICENSE file in the root of the source |
| * tree. An additional intellectual property rights grant can be found |
| * in the file PATENTS. All contributing project authors may |
| * be found in the AUTHORS file in the root of the source tree. |
| */ |
| |
| #ifndef WEBRTC_VOICE_ENGINE_LEVEL_INDICATOR_H |
| #define WEBRTC_VOICE_ENGINE_LEVEL_INDICATOR_H |
| |
| #include "webrtc/base/criticalsection.h" |
| #include "webrtc/typedefs.h" |
| #include "webrtc/voice_engine/voice_engine_defines.h" |
| |
| namespace webrtc { |
| |
| class AudioFrame; |
| namespace voe { |
| |
| class AudioLevel |
| { |
| public: |
| AudioLevel(); |
| virtual ~AudioLevel(); |
| |
| // Called on "API thread(s)" from APIs like VoEBase::CreateChannel(), |
| // VoEBase::StopSend(), VoEVolumeControl::GetSpeechOutputLevel(). |
| int8_t Level() const; |
| int16_t LevelFullRange() const; |
| void Clear(); |
| |
| // Called on a native capture audio thread (platform dependent) from the |
| // AudioTransport::RecordedDataIsAvailable() callback. |
| // In Chrome, this method is called on the AudioInputDevice thread. |
| void ComputeLevel(const AudioFrame& audioFrame); |
| |
| private: |
| enum { kUpdateFrequency = 10}; |
| |
| rtc::CriticalSection _critSect; |
| |
| int16_t _absMax; |
| int16_t _count; |
| int8_t _currentLevel; |
| int16_t _currentLevelFullRange; |
| }; |
| |
| } // namespace voe |
| |
| } // namespace webrtc |
| |
| #endif // WEBRTC_VOICE_ENGINE_LEVEL_INDICATOR_H |