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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 AUDIO_AUDIO_LEVEL_H_
#define AUDIO_AUDIO_LEVEL_H_
#include "rtc_base/criticalsection.h"
#include "rtc_base/thread_annotations.h"
namespace webrtc {
class AudioFrame;
namespace voe {
class AudioLevel {
public:
AudioLevel();
~AudioLevel();
// Called on "API thread(s)" from APIs like VoEBase::CreateChannel(),
// VoEBase::StopSend()
int16_t LevelFullRange() const;
void Clear();
// See the description for "totalAudioEnergy" in the WebRTC stats spec
// (https://w3c.github.io/webrtc-stats/#dom-rtcmediastreamtrackstats-totalaudioenergy)
double TotalEnergy() const;
double TotalDuration() const;
// 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, double duration);
private:
enum { kUpdateFrequency = 10 };
rtc::CriticalSection crit_sect_;
int16_t abs_max_ RTC_GUARDED_BY(crit_sect_);
int16_t count_ RTC_GUARDED_BY(crit_sect_);
int16_t current_level_full_range_ RTC_GUARDED_BY(crit_sect_);
double total_energy_ RTC_GUARDED_BY(crit_sect_) = 0.0;
double total_duration_ RTC_GUARDED_BY(crit_sect_) = 0.0;
};
} // namespace voe
} // namespace webrtc
#endif // AUDIO_AUDIO_LEVEL_H_
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