key_system_info.h revision 5c02ac1a9c1b504631c0a3d2b6e737b5d738bae1 
1// Copyright 2013 The Chromium Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style license that can be
3// found in the LICENSE file.
4
5#ifndef CONTENT_PUBLIC_RENDERER_KEY_SYSTEM_INFO_H_
6#define CONTENT_PUBLIC_RENDERER_KEY_SYSTEM_INFO_H_
7
8#include <map>
9#include <string>
10
11#include "base/basictypes.h"
12#include "base/containers/hash_tables.h"
13#include "content/common/content_export.h"
14#include "content/public/common/eme_codec.h"
15
16// Definitions:
17// * Key system
18//    https://dvcs.w3.org/hg/html-media/raw-file/default/encrypted-media/encrypted-media.html#key-system
19// * Concrete key system
20//    A key system string that can be instantiated, such as
21//    via the MediaKeys constructor. Examples include "org.w3.clearkey" and
22//    "com.widevine.alpha".
23// * Abstract key system
24//    A key system string that cannot be instantiated like a concrete key system
25//    but is otherwise useful, such as in discovery using isTypeSupported().
26// * Parent key system
27//    A key system string that is one level up from the child key system. It may
28//    be an abstract key system.
29//    As an example, "com.example" is the parent of "com.example.foo".
30
31namespace content {
32
33// Contains information about an EME key system as well as how to instantiate
34// the corresponding CDM.
35struct CONTENT_EXPORT KeySystemInfo {
36  explicit KeySystemInfo(const std::string& key_system);
37  ~KeySystemInfo();
38
39  std::string key_system;
40
41  // Specifies codecs supported by |key_system|.
42  SupportedCodecs supported_codecs;
43
44  // A hierarchical parent for |key_system|. This value can be used to check
45  // supported types but cannot be used to instantiate a MediaKeys object.
46  // Only one parent key system is currently supported per concrete key system.
47  std::string parent_key_system;
48
49  // The following indicate how the corresponding CDM should be instantiated.
50  bool use_aes_decryptor;
51#if defined(ENABLE_PEPPER_CDMS)
52  std::string pepper_type;
53#endif
54};
55
56}  // namespace content
57
58#endif  // CONTENT_PUBLIC_RENDERER_KEY_SYSTEM_INFO_H_
59