Source/WebKit/GPUProcess/media/RemoteLegacyCDMFactoryProxy.h

/*
 * 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
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 */

#pragma once

#if ENABLE(GPU_PROCESS) && ENABLE(LEGACY_ENCRYPTED_MEDIA)

#include "Connection.h"
#include "GPUConnectionToWebProcess.h"
#include "MessageReceiver.h"
#include "RemoteLegacyCDMIdentifier.h"
#include "RemoteLegacyCDMSessionIdentifier.h"
#include <WebCore/MediaPlayerIdentifier.h>
#include <wtf/UniqueRef.h>
#include <wtf/WeakPtr.h>

namespace WebKit {

class RemoteLegacyCDMSessionProxy;
class RemoteLegacyCDMProxy;
struct RemoteLegacyCDMConfiguration;

class RemoteLegacyCDMFactoryProxy final : public IPC::MessageReceiver {
    WTF_MAKE_FAST_ALLOCATED;
public:
    RemoteLegacyCDMFactoryProxy(GPUConnectionToWebProcess&);
    virtual ~RemoteLegacyCDMFactoryProxy();

    void didReceiveMessageFromWebProcess(IPC::Connection& connection, IPC::Decoder& decoder) { didReceiveMessage(connection, decoder); }
    bool didReceiveSyncMessageFromWebProcess(IPC::Connection& connection, IPC::Decoder& decoder, UniqueRef<IPC::Encoder>& encoder) { return didReceiveSyncMessage(connection, decoder, encoder); }
    void didReceiveCDMMessage(IPC::Connection&, IPC::Decoder&);
    void didReceiveCDMSessionMessage(IPC::Connection&, IPC::Decoder&);
    bool didReceiveSyncCDMMessage(IPC::Connection&, IPC::Decoder&, UniqueRef<IPC::Encoder>&);
    bool didReceiveSyncCDMSessionMessage(IPC::Connection&, IPC::Decoder&, UniqueRef<IPC::Encoder>&);

    void addProxy(RemoteLegacyCDMIdentifier, std::unique_ptr<RemoteLegacyCDMProxy>&&);
    void removeProxy(RemoteLegacyCDMIdentifier);

    void addSession(RemoteLegacyCDMSessionIdentifier, std::unique_ptr<RemoteLegacyCDMSessionProxy>&&);
    void removeSession(RemoteLegacyCDMSessionIdentifier);
    RemoteLegacyCDMSessionProxy* getSession(const RemoteLegacyCDMSessionIdentifier&) const;

    GPUConnectionToWebProcess* gpuConnectionToWebProcess() { return m_gpuConnectionToWebProcess.get(); }

    bool allowsExitUnderMemoryPressure() const;

private:
    friend class GPUProcessConnection;
    // IPC::MessageReceiver
    void didReceiveMessage(IPC::Connection&, IPC::Decoder&) final { }
    bool didReceiveSyncMessage(IPC::Connection&, IPC::Decoder&, UniqueRef<IPC::Encoder>&) final;

    // Messages
    void createCDM(const String& keySystem, std::optional<WebCore::MediaPlayerIdentifier>&&, CompletionHandler<void(RemoteLegacyCDMIdentifier&&)>&&);
    void supportsKeySystem(const String& keySystem, std::optional<String> mimeType, CompletionHandler<void(bool)>&&);

    WeakPtr<GPUConnectionToWebProcess> m_gpuConnectionToWebProcess;
    HashMap<RemoteLegacyCDMIdentifier, std::unique_ptr<RemoteLegacyCDMProxy>> m_proxies;
    HashMap<RemoteLegacyCDMSessionIdentifier, std::unique_ptr<RemoteLegacyCDMSessionProxy>> m_sessions;
};

}

#endif