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/*
* 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/typedefs.h"
#include "webrtc/voice_engine/voice_engine_defines.h"
namespace webrtc {
class AudioFrame;
class CriticalSectionWrapper;
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};
CriticalSectionWrapper& _critSect;
int16_t _absMax;
int16_t _count;
int8_t _currentLevel;
int16_t _currentLevelFullRange;
};
} // namespace voe
} // namespace webrtc
#endif // WEBRTC_VOICE_ENGINE_LEVEL_INDICATOR_H
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