content/public/renderer/key_system_info.h

   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
  31 namespace content {
  32
  33 // Contains information about an EME key system as well as how to instantiate
  34 // the corresponding CDM.
  35 struct 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_