media/cdm/key_system_names.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_CDM_KEY_SYSTEM_NAMES_H_
   6 #define MEDIA_CDM_KEY_SYSTEM_NAMES_H_
   7
   8 #include <string>
   9
  10 #include "media/base/media_export.h"
  11
  12 namespace media {
  13
  14 // TODO(jrummell): Change other uses of Clear Key to use this common value.
  15
  16 // The key system name for Clear Key.
  17 MEDIA_EXPORT extern const char kClearKey[];
  18
  19 // The key system name for External Clear Key.
  20 MEDIA_EXPORT extern const char kExternalClearKey[];
  21
  22 // Returns true if |key_system| is Clear Key, false otherwise.
  23 MEDIA_EXPORT inline bool IsClearKey(const std::string& key_system) {
  24   return key_system == kClearKey;
  25 }
  26
  27 // Returns true if |key_system| is (reverse) sub-domain of |parent_key_system|.
  28 MEDIA_EXPORT bool IsParentKeySystemOf(const std::string& parent_key_system,
  29                                       const std::string& key_system);
  30
  31 // Returns true if |key_system| is External Clear Key, false otherwise.
  32 MEDIA_EXPORT bool IsExternalClearKey(const std::string& key_system);
  33
  34 }  // namespace media
  35
  36 #endif  // MEDIA_CDM_KEY_SYSTEM_NAMES_H_