1 /*****************************************************************
2 |
3 |    AP4 - ohdr Atom
4 |
5 |    Copyright 2002-2008 Axiomatic Systems, LLC
6 |
7 |
8 |    This file is part of Bento4/AP4 (MP4 Atom Processing Library).
9 |
10 |    Unless you have obtained Bento4 under a difference license,
11 |    this version of Bento4 is Bento4|GPL.
12 |    Bento4|GPL is free software; you can redistribute it and/or modify
13 |    it under the terms of the GNU General Public License as published by
14 |    the Free Software Foundation; either version 2, or (at your option)
15 |    any later version.
16 |
17 |    Bento4|GPL is distributed in the hope that it will be useful,
18 |    but WITHOUT ANY WARRANTY; without even the implied warranty of
19 |    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
20 |    GNU General Public License for more details.
21 |
22 |    You should have received a copy of the GNU General Public License
23 |    along with Bento4|GPL; see the file COPYING.  If not, write to the
24 |    Free Software Foundation, 59 Temple Place - Suite 330, Boston, MA
25 |    02111-1307, USA.
26 |
27 ****************************************************************/
28 
29 #ifndef _AP4_OHDR_ATOM_H_
30 #define _AP4_OHDR_ATOM_H_
31 
32 /*----------------------------------------------------------------------
33 |   includes
34 +---------------------------------------------------------------------*/
35 #include "Ap4Types.h"
36 #include "Ap4Atom.h"
37 #include "Ap4ContainerAtom.h"
38 #include "Ap4String.h"
39 #include "Ap4OmaDcf.h"
40 
41 /*----------------------------------------------------------------------
42 |   constants
43 +---------------------------------------------------------------------*/
44 const AP4_UI08 AP4_OMA_DCF_ENCRYPTION_METHOD_NULL    = 0;
45 const AP4_UI08 AP4_OMA_DCF_ENCRYPTION_METHOD_AES_CBC = 1;
46 const AP4_UI08 AP4_OMA_DCF_ENCRYPTION_METHOD_AES_CTR = 2;
47 
48 const AP4_UI08 AP4_OMA_DCF_PADDING_SCHEME_NONE     = 0;
49 const AP4_UI08 AP4_OMA_DCF_PADDING_SCHEME_RFC_2630 = 1;
50 
51 /*----------------------------------------------------------------------
52 |   AP4_OhdrAtom
53 +---------------------------------------------------------------------*/
54 class AP4_OhdrAtom : public AP4_ContainerAtom, public AP4_OmaDrmInfo
55 {
56 public:
57     AP4_IMPLEMENT_DYNAMIC_CAST_D2(AP4_OhdrAtom, AP4_ContainerAtom, AP4_OmaDrmInfo)
58 
59     // class methods
60     static AP4_OhdrAtom* Create(AP4_Size         size,
61                                 AP4_ByteStream&  stream,
62                                 AP4_AtomFactory& atom_factory);
63 
64     // constructor
65     AP4_OhdrAtom(AP4_UI08        encryption_method,
66                  AP4_UI08        padding_scheme,
67                  AP4_UI64        plaintext_length,
68                  const char*     content_id,
69                  const char*     rights_issuer_url,
70                  const AP4_Byte* textual_headers,
71                  AP4_Size        textual_headers_size);
72 
73     // methods
74     virtual AP4_Result InspectFields(AP4_AtomInspector& inspector);
75     virtual AP4_Result WriteFields(AP4_ByteStream& stream);
76     virtual AP4_Atom*  Clone();
77 
78     // accessors
GetEncryptionMethod()79     AP4_UI08          GetEncryptionMethod()   const { return m_EncryptionMethod; }
SetEncryptionMethod(AP4_UI08 encryption_method)80     void              SetEncryptionMethod(AP4_UI08 encryption_method) { m_EncryptionMethod = encryption_method; }
GetPaddingScheme()81     AP4_UI08          GetPaddingScheme()      const { return m_PaddingScheme;    }
SetPaddingScheme(AP4_UI08 padding_scheme)82     void              SetPaddingScheme(AP4_UI08 padding_scheme) { m_PaddingScheme = padding_scheme; }
GetPlaintextLength()83     AP4_UI64          GetPlaintextLength()    const { return m_PlaintextLength;  }
84 
85     // AP4_OmaDrmInfo implementation
GetContentId()86     const AP4_String& GetContentId()          const { return m_ContentId;        }
GetRightsIssuerUrl()87     const AP4_String& GetRightsIssuerUrl()    const { return m_RightsIssuerUrl;  }
GetTextualHeaders()88     const AP4_DataBuffer& GetTextualHeaders() const { return m_TextualHeaders;   }
89 
90 private:
91     // methods
92     AP4_OhdrAtom(AP4_UI32         size,
93                  AP4_UI08         version,
94                  AP4_UI32         flags,
95                  AP4_ByteStream&  stream,
96                  AP4_AtomFactory& atom_factory);
97 
98     // members
99     AP4_UI08       m_EncryptionMethod;
100     AP4_UI08       m_PaddingScheme;
101     AP4_UI64       m_PlaintextLength;
102     AP4_String     m_ContentId;
103     AP4_String     m_RightsIssuerUrl;
104     AP4_DataBuffer m_TextualHeaders;
105 };
106 
107 #endif // _AP4_OHDR_ATOM_H_
108