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/*
* Copyright (C) 2020 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
* THE POSSIBILITY OF SUCH DAMAGE.
*/
#pragma once
#if ENABLE(GPU_PROCESS) && ENABLE(WEB_AUDIO)
#include "Connection.h"
#include "GPUProcessConnection.h"
#include "IPCSemaphore.h"
#include "RemoteAudioDestinationIdentifier.h"
#include <WebCore/AudioDestinationResampler.h>
#include <WebCore/AudioIOCallback.h>
#include <wtf/CrossThreadQueue.h>
#include <wtf/MediaTime.h>
#include <wtf/Threading.h>
#if PLATFORM(COCOA)
#include "SharedCARingBuffer.h"
#endif
#if PLATFORM(COCOA)
namespace WebCore {
class WebAudioBufferList;
}
#endif
namespace WebKit {
class RemoteAudioDestinationProxy final : public WebCore::AudioDestinationResampler, public GPUProcessConnection::Client, public ThreadSafeRefCountedAndCanMakeThreadSafeWeakPtr<RemoteAudioDestinationProxy> {
WTF_MAKE_NONCOPYABLE(RemoteAudioDestinationProxy);
public:
using AudioIOCallback = WebCore::AudioIOCallback;
static Ref<RemoteAudioDestinationProxy> create(AudioIOCallback&, const String& inputDeviceId, unsigned numberOfInputChannels, unsigned numberOfOutputChannels, float sampleRate);
RemoteAudioDestinationProxy(AudioIOCallback&, const String& inputDeviceId, unsigned numberOfInputChannels, unsigned numberOfOutputChannels, float sampleRate);
~RemoteAudioDestinationProxy();
void ref() const final { return ThreadSafeRefCountedAndCanMakeThreadSafeWeakPtr<RemoteAudioDestinationProxy>::ref(); }
void deref() const final { return ThreadSafeRefCountedAndCanMakeThreadSafeWeakPtr<RemoteAudioDestinationProxy>::deref(); }
ThreadSafeWeakPtrControlBlock& controlBlock() const final { return ThreadSafeRefCountedAndCanMakeThreadSafeWeakPtr<RemoteAudioDestinationProxy>::controlBlock(); }
private:
void startRendering(CompletionHandler<void(bool)>&&) final;
void stopRendering(CompletionHandler<void(bool)>&&) final;
void startRenderingThread();
void stopRenderingThread();
void renderAudio(unsigned frameCount);
IPC::Connection* connection();
IPC::Connection* existingConnection();
// GPUProcessConnection::Client.
void gpuProcessConnectionDidClose(GPUProcessConnection&) final;
RemoteAudioDestinationIdentifier m_destinationID; // Call destinationID() getter to make sure the destinationID is valid.
ThreadSafeWeakPtr<GPUProcessConnection> m_gpuProcessConnection;
#if PLATFORM(COCOA)
std::unique_ptr<ProducerSharedCARingBuffer> m_ringBuffer;
std::unique_ptr<WebCore::WebAudioBufferList> m_audioBufferList;
uint64_t m_currentFrame { 0 };
#endif
IPC::Semaphore m_renderSemaphore;
String m_inputDeviceId;
unsigned m_numberOfInputChannels;
float m_remoteSampleRate;
RefPtr<Thread> m_renderThread;
std::atomic<bool> m_shouldStopThread { false };
};
} // namespace WebKit
#endif // ENABLE(GPU_PROCESS) && ENABLE(WEB_AUDIO)
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