91 lines
3.5 KiB
C++
91 lines
3.5 KiB
C++
/*
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* Copyright (C) 2011, Google Inc. All rights reserved.
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* Copyright (C) 2020-2021, Apple Inc. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS BE LIABLE FOR ANY
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* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
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* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#pragma once
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#include "AudioDestinationNode.h"
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#include "AudioIOCallback.h"
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namespace WebCore {
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class AudioContext;
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class AudioDestination;
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class DefaultAudioDestinationNode final : public AudioDestinationNode, public AudioIOCallback {
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WTF_MAKE_ISO_ALLOCATED(DefaultAudioDestinationNode);
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public:
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explicit DefaultAudioDestinationNode(AudioContext&, std::optional<float> sampleRate = std::nullopt);
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~DefaultAudioDestinationNode();
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AudioContext& context();
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const AudioContext& context() const;
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unsigned framesPerBuffer() const;
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void startRendering(CompletionHandler<void(std::optional<Exception>&&)>&&) final;
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void resume(CompletionHandler<void(std::optional<Exception>&&)>&&);
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void suspend(CompletionHandler<void(std::optional<Exception>&&)>&&);
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void close(CompletionHandler<void()>&&);
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void setMuted(bool muted) { m_muted = muted; }
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bool isPlayingAudio() const { return m_isEffectivelyPlayingAudio; }
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private:
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void createDestination();
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void clearDestination();
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void recreateDestination();
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// AudioIOCallback
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// The audio hardware calls render() to get the next render quantum of audio into destinationBus.
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// It will optionally give us local/live audio input in sourceBus (if it's not 0).
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void render(AudioBus* sourceBus, AudioBus* destinationBus, size_t numberOfFrames, const AudioIOPosition& outputPosition) final;
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void isPlayingDidChange() final;
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void setIsSilent(bool);
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void updateIsEffectivelyPlayingAudio();
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Function<void(Function<void()>&&)> dispatchToRenderThreadFunction();
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void initialize() final;
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void uninitialize() final;
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ExceptionOr<void> setChannelCount(unsigned) final;
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bool requiresTailProcessing() const final { return false; }
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void enableInput(const String& inputDeviceId) final;
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void restartRendering() final;
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unsigned maxChannelCount() const final;
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RefPtr<AudioDestination> m_destination;
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String m_inputDeviceId;
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unsigned m_numberOfInputChannels { 0 };
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bool m_wasDestinationStarted { false };
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bool m_isEffectivelyPlayingAudio { false };
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bool m_isSilent { true };
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bool m_muted { false };
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};
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} // namespace WebCore
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