1/*
2 * Copyright (C) 2013 Apple Inc. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 *    notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 *    notice, this list of conditions and the following disclaimer in the
11 *    documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
14 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
15 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
17 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
18 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
19 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
20 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
21 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
22 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
23 * THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26#ifndef CDM_h
27#define CDM_h
28
29#if ENABLE(ENCRYPTED_MEDIA_V2)
30
31#include <wtf/Forward.h>
32#include <wtf/PassRefPtr.h>
33#include <wtf/Uint8Array.h>
34#include <wtf/text/WTFString.h>
35
36namespace WebCore {
37
38class CDM;
39class CDMPrivateInterface;
40class CDMSession;
41class MediaPlayer;
42
43typedef PassOwnPtr<CDMPrivateInterface> (*CreateCDM)(CDM*);
44typedef bool (*CDMSupportsKeySystem)(const String&);
45typedef bool (*CDMSupportsKeySystemAndMimeType)(const String&, const String&);
46
47class CDMClient {
48public:
49    virtual ~CDMClient() { }
50
51    virtual MediaPlayer* cdmMediaPlayer(const CDM*) const = 0;
52};
53
54class CDMSession {
55public:
56    CDMSession() { }
57    virtual ~CDMSession() { }
58
59    virtual const String& sessionId() const = 0;
60    virtual PassRefPtr<Uint8Array> generateKeyRequest(const String& mimeType, Uint8Array* initData, String& destinationURL, unsigned short& errorCode, unsigned long& systemCode) = 0;
61    virtual void releaseKeys() = 0;
62    virtual bool update(Uint8Array*, RefPtr<Uint8Array>& nextMessage, unsigned short& errorCode, unsigned long& systemCode) = 0;
63};
64
65class CDM {
66public:
67
68    enum CDMErrorCode { UnknownError = 1, ClientError, ServiceError, OutputError, HardwareChangeError, DomainError };
69    static bool supportsKeySystem(const String&);
70    static bool keySystemSupportsMimeType(const String& keySystem, const String& mimeType);
71    static PassOwnPtr<CDM> create(const String& keySystem);
72    static void registerCDMFactory(CreateCDM, CDMSupportsKeySystem, CDMSupportsKeySystemAndMimeType);
73    ~CDM();
74
75    bool supportsMIMEType(const String&) const;
76    PassOwnPtr<CDMSession> createSession();
77
78    const String& keySystem() const { return m_keySystem; }
79
80    CDMClient* client() const { return m_client; }
81    void setClient(CDMClient* client) { m_client = client; }
82
83    MediaPlayer* mediaPlayer() const;
84
85private:
86    CDM(const String& keySystem);
87
88    String m_keySystem;
89    OwnPtr<CDMPrivateInterface> m_private;
90    CDMClient* m_client;
91};
92
93}
94
95#endif // ENABLE(ENCRYPTED_MEDIA_V2)
96
97#endif // CDM_h
98