1 /* 2 * Copyright (C) 2017 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #ifndef LICENSE_FETCHER_H_ 18 #define LICENSE_FETCHER_H_ 19 20 #include "protos/license_protos.pb.h" 21 #include <media/stagefright/foundation/ABase.h> 22 23 namespace android { 24 namespace clearkeycas { 25 26 // Interface for classes which request a license. 27 class LicenseFetcher { 28 public: 29 LicenseFetcher() {} 30 virtual ~LicenseFetcher() {} 31 32 // Initializes resources set in subclass-specific calls. This must be called 33 // before threads are started. 34 virtual status_t Init(const char *input) = 0; 35 36 // Fetches license based on |asset_id|. On return, |asset| contains the 37 // decrypted asset_key needed to decrypt content keys. 38 // |asset| must be non-null. 39 virtual status_t FetchLicense( 40 uint64_t asset_id, clearkeycas::Asset* asset) = 0; 41 42 private: 43 DISALLOW_EVIL_CONSTRUCTORS(LicenseFetcher); 44 }; 45 46 } // namespace clearkeycas 47 } // namespace android 48 49 #endif // LICENSE_FETCHER_H_ 50
