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- // Copyright 2013 The Chromium Authors. All rights reserved.
- // Use of this source code is governed by a BSD-style license that can be
- // found in the LICENSE file.
- #include "media/base/key_system_names.h"
- namespace media {
- const char kClearKey[] = "org.w3.clearkey";
- const char kExternalClearKey[] = "org.chromium.externalclearkey";
- bool IsClearKey(const std::string& key_system) {
- return key_system == kClearKey;
- }
- bool IsSubKeySystemOf(const std::string& key_system, const std::string& base) {
- std::string prefix = base + '.';
- return key_system.substr(0, prefix.size()) == prefix;
- }
- bool IsExternalClearKey(const std::string& key_system) {
- return key_system == kExternalClearKey ||
- IsSubKeySystemOf(key_system, kExternalClearKey);
- }
- } // namespace media
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