Source/WebKit/WebProcess/GPU/media/RemoteLegacyCDMSession.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
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#pragma once

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

#include "MessageReceiver.h"
#include "RemoteLegacyCDMSessionIdentifier.h"
#include <WebCore/LegacyCDMSession.h>
#include <wtf/WeakPtr.h>

namespace IPC {
class SharedBufferDataReference;
}

namespace WebKit {

class RemoteLegacyCDMFactory;

class RemoteLegacyCDMSession final
    : public WebCore::LegacyCDMSession
    , public IPC::MessageReceiver {
public:
    static std::unique_ptr<RemoteLegacyCDMSession> create(WeakPtr<RemoteLegacyCDMFactory>, RemoteLegacyCDMSessionIdentifier&&);

    // MessageReceiver
    void didReceiveMessage(IPC::Connection&, IPC::Decoder&) final;

    const RemoteLegacyCDMSessionIdentifier& identifier() const { return m_identifier; }

private:
    RemoteLegacyCDMSession(WeakPtr<RemoteLegacyCDMFactory>, RemoteLegacyCDMSessionIdentifier&&);

    // LegacyCDMSession
    WebCore::LegacyCDMSessionType type() final { return WebCore::CDMSessionTypeRemote; }
    void setClient(WebCore::LegacyCDMSessionClient* client) final { m_client = client; }
    const String& sessionId() const final { return m_sessionId; }
    RefPtr<Uint8Array> generateKeyRequest(const String& mimeType, Uint8Array* initData, String& destinationURL, unsigned short& errorCode, uint32_t& systemCode) final;
    void releaseKeys() final;
    bool update(Uint8Array*, RefPtr<Uint8Array>& nextMessage, unsigned short& errorCode, uint32_t& systemCode) final;
    RefPtr<ArrayBuffer> cachedKeyForKeyID(const String&) const final;

    // Messages
    void sendMessage(Optional<IPC::SharedBufferDataReference>&& message, const String& destinationURL);
    void sendError(WebCore::LegacyCDMSessionClient::MediaKeyErrorCode, uint32_t systemCode);

    WeakPtr<RemoteLegacyCDMFactory> m_factory;
    RemoteLegacyCDMSessionIdentifier m_identifier;
    WebCore::LegacyCDMSessionClient* m_client;
    String m_sessionId;
    mutable HashMap<String, RefPtr<ArrayBuffer>> m_cachedKeyCache;
};

}

#endif