chromium/third_party/blink/renderer/platform/mediastream/media_stream_audio_level_calculator.h

// Copyright 2014 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef THIRD_PARTY_BLINK_RENDERER_PLATFORM_MEDIASTREAM_MEDIA_STREAM_AUDIO_LEVEL_CALCULATOR_H_
#define THIRD_PARTY_BLINK_RENDERER_PLATFORM_MEDIASTREAM_MEDIA_STREAM_AUDIO_LEVEL_CALCULATOR_H_

#include "base/memory/scoped_refptr.h"
#include "base/synchronization/lock.h"
#include "base/types/pass_key.h"
#include "third_party/blink/renderer/platform/platform_export.h"
#include "third_party/blink/renderer/platform/wtf/thread_safe_ref_counted.h"

namespace media {
class AudioBus;
}

namespace blink {

// This class is used by the WebRtcAudioCapturer to calculate the level of the
// audio signal. And the audio level will be eventually used by the volume
// animation UI.
//
// The algorithm used by this class is the same as how it is done in
// third_party/webrtc/voice_engine/level_indicator.cc.
class PLATFORM_EXPORT MediaStreamAudioLevelCalculator { … };

}  // namespace blink

#endif  // THIRD_PARTY_BLINK_RENDERER_PLATFORM_MEDIASTREAM_MEDIA_STREAM_AUDIO_LEVEL_CALCULATOR_H_