Source/WebKit/GPUProcess/media/RemoteLegacyCDMSessionProxy.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
 * 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

#include "MessageReceiver.h"
#include "RemoteLegacyCDMFactoryProxy.h"
#include "RemoteLegacyCDMSessionIdentifier.h"
#include <WebCore/LegacyCDMSession.h>
#include <wtf/Forward.h>
#include <wtf/UniqueRef.h>

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

namespace WebCore {
class LegacyCDM;
class LegacyCDMSession;
class SharedBuffer;
}

namespace IPC {
class SharedBufferCopy;
}

namespace WebKit {

class RemoteLegacyCDMProxy;
class RemoteMediaPlayerProxy;

class RemoteLegacyCDMSessionProxy
    : public IPC::MessageReceiver
    , public WebCore::LegacyCDMSessionClient {
public:
    static std::unique_ptr<RemoteLegacyCDMSessionProxy> create(WeakPtr<RemoteLegacyCDMFactoryProxy>&&, RemoteLegacyCDMSessionIdentifier, WebCore::LegacyCDM&);
    ~RemoteLegacyCDMSessionProxy();

    RemoteLegacyCDMFactoryProxy* factory() const { return m_factory.get(); }
    WebCore::LegacyCDMSession* session() const { return m_session.get(); }

    void setPlayer(WeakPtr<RemoteMediaPlayerProxy> player) { m_player = WTFMove(player); }

    RefPtr<ArrayBuffer> getCachedKeyForKeyId(const String&);

private:
    friend class RemoteLegacyCDMFactoryProxy;
    RemoteLegacyCDMSessionProxy(WeakPtr<RemoteLegacyCDMFactoryProxy>&&, RemoteLegacyCDMSessionIdentifier, WebCore::LegacyCDM&);

    // IPC::MessageReceiver
    void didReceiveMessage(IPC::Connection&, IPC::Decoder&) final;
    bool didReceiveSyncMessage(IPC::Connection&, IPC::Decoder&, UniqueRef<IPC::Encoder>&) final;

    // LegacyCDMSessionClient
    void sendMessage(Uint8Array*, String destinationURL) final;
    void sendError(MediaKeyErrorCode, uint32_t systemCode) final;
    String mediaKeysStorageDirectory() const final;

    // Messages
    using GenerateKeyCallback = CompletionHandler<void(std::optional<IPC::SharedBufferCopy>&&, const String&, unsigned short, uint32_t)>;
    void generateKeyRequest(const String& mimeType, IPC::SharedBufferCopy&& initData, GenerateKeyCallback&&);
    void releaseKeys();
    using UpdateCallback = CompletionHandler<void(bool, std::optional<IPC::SharedBufferCopy>&&, unsigned short, uint32_t)>;
    void update(IPC::SharedBufferCopy&& update, UpdateCallback&&);
    using CachedKeyForKeyIDCallback = CompletionHandler<void(std::optional<IPC::SharedBufferCopy>&&)>;
    void cachedKeyForKeyID(String keyId, CachedKeyForKeyIDCallback&&);

    WeakPtr<RemoteLegacyCDMFactoryProxy> m_factory;
    RemoteLegacyCDMSessionIdentifier m_identifier;
    std::unique_ptr<WebCore::LegacyCDMSession> m_session;
    WeakPtr<RemoteMediaPlayerProxy> m_player;
};

}

#endif