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