| /* |
| * Copyright (C) 2017 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| #ifndef SAMPLE_AES_PROCESSOR_H_ |
| |
| #define SAMPLE_AES_PROCESSOR_H_ |
| |
| #include <media/stagefright/foundation/AMessage.h> |
| #include <media/stagefright/foundation/AString.h> |
| |
| #include <openssl/aes.h> |
| |
| #include <utils/Errors.h> |
| #include <utils/List.h> |
| #include <utils/RefBase.h> |
| #include <utils/Vector.h> |
| |
| namespace android { |
| |
| struct HlsSampleDecryptor : RefBase { |
| |
| HlsSampleDecryptor(); |
| explicit HlsSampleDecryptor(const sp<AMessage> &sampleAesKeyItem); |
| |
| void signalNewSampleAesKey(const sp<AMessage> &sampleAesKeyItem); |
| |
| size_t processNal(uint8_t *nalData, size_t nalSize); |
| void processAAC(size_t adtsHdrSize, uint8_t *data, size_t size); |
| void processAC3(uint8_t *data, size_t size); |
| |
| static AString aesBlockToStr(uint8_t block[AES_BLOCK_SIZE]); |
| |
| private: |
| size_t unescapeStream(uint8_t *data, size_t limit) const; |
| size_t findNextUnescapeIndex(uint8_t *data, size_t offset, size_t limit) const; |
| status_t decryptBlock(uint8_t *buffer, size_t size, uint8_t AESInitVec[AES_BLOCK_SIZE]); |
| |
| static const int VIDEO_CLEAR_LEAD = 32; |
| static const int AUDIO_CLEAR_LEAD = 16; |
| |
| AES_KEY mAesKey; |
| uint8_t mAESInitVec[AES_BLOCK_SIZE]; |
| bool mValidKeyInfo; |
| |
| DISALLOW_EVIL_CONSTRUCTORS(HlsSampleDecryptor); |
| }; |
| |
| } // namespace android |
| |
| #endif // SAMPLE_AES_PROCESSOR_H_ |