media/base/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 MEDIA_BASE_KEY_SYSTEM_INFO_H_
   6 #define MEDIA_BASE_KEY_SYSTEM_INFO_H_
   7
   8 #include <string>
   9
  10 #include "media/base/eme_constants.h"
  11 #include "media/base/media_export.h"
  12
  13 // Definitions:
  14 // * Key system
  15 //    https://dvcs.w3.org/hg/html-media/raw-file/default/encrypted-media/encrypted-media.html#key-system
  16 // * Concrete key system
  17 //    A key system string that can be instantiated, such as
  18 //    via the MediaKeys constructor. Examples include "org.w3.clearkey" and
  19 //    "com.widevine.alpha".
  20 // * Abstract key system
  21 //    A key system string that cannot be instantiated like a concrete key system
  22 //    but is otherwise useful, such as in discovery using isTypeSupported().
  23 // * Parent key system
  24 //    A key system string that is one level up from the child key system. It may
  25 //    be an abstract key system.
  26 //    As an example, "com.example" is the parent of "com.example.foo".
  27
  28 namespace media {
  29
  30 // Contains information about an EME key system as well as how to instantiate
  31 // the corresponding CDM.
  32 struct MEDIA_EXPORT KeySystemInfo {
  33   KeySystemInfo();
  34   ~KeySystemInfo();
  35
  36   std::string key_system;
  37
  38   InitDataTypeMask supported_init_data_types;
  39   SupportedCodecs supported_codecs;
  40   EmeRobustness max_audio_robustness;
  41   EmeRobustness max_video_robustness;
  42   EmeSessionTypeSupport persistent_license_support;
  43   EmeSessionTypeSupport persistent_release_message_support;
  44   EmeFeatureSupport persistent_state_support;
  45   EmeFeatureSupport distinctive_identifier_support;
  46
  47   // A hierarchical parent for |key_system|. This value can be used to check
  48   // supported types but cannot be used to instantiate a MediaKeys object.
  49   // Only one parent key system is currently supported per concrete key system.
  50   std::string parent_key_system;
  51
  52   // The following indicate how the corresponding CDM should be instantiated.
  53   bool use_aes_decryptor;
  54 #if defined(ENABLE_PEPPER_CDMS)
  55   std::string pepper_type;
  56 #endif
  57 };
  58
  59 }  // namespace media
  60
  61 #endif  // MEDIA_BASE_KEY_SYSTEM_INFO_H_