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1 // Copyright 2013 The Chromium Authors. All rights reserved. | 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 | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #include "media/cdm/key_system_names.h" | 5 #include "media/cdm/key_system_names.h" |
6 | 6 |
7 #include <string> | 7 #include <string> |
8 | 8 |
9 namespace media { | 9 namespace media { |
10 | 10 |
11 const char kClearKey[] = "org.w3.clearkey"; | 11 const char kClearKey[] = "org.w3.clearkey"; |
12 const char kExternalClearKey[] = "org.chromium.externalclearkey"; | 12 const char kExternalClearKey[] = "org.chromium.externalclearkey"; |
13 | 13 |
| 14 bool IsClearKey(const std::string& key_system) { |
| 15 return key_system == kClearKey; |
| 16 } |
| 17 |
14 bool IsParentKeySystemOf(const std::string& parent_key_system, | 18 bool IsParentKeySystemOf(const std::string& parent_key_system, |
15 const std::string& key_system) { | 19 const std::string& key_system) { |
16 std::string prefix = parent_key_system + '.'; | 20 std::string prefix = parent_key_system + '.'; |
17 return key_system.substr(0, prefix.size()) == prefix; | 21 return key_system.substr(0, prefix.size()) == prefix; |
18 } | 22 } |
19 | 23 |
20 bool IsExternalClearKey(const std::string& key_system) { | 24 bool IsExternalClearKey(const std::string& key_system) { |
21 return key_system == kExternalClearKey || | 25 return key_system == kExternalClearKey || |
22 IsParentKeySystemOf(kExternalClearKey, key_system); | 26 IsParentKeySystemOf(kExternalClearKey, key_system); |
23 } | 27 } |
24 | 28 |
25 } // namespace media | 29 } // namespace media |
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