| /* |
| * Copyright (C) 2010 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 A_BIT_READER_H_ |
| |
| #define A_BIT_READER_H_ |
| |
| #include <media/stagefright/foundation/ABase.h> |
| |
| #include <sys/types.h> |
| #include <stdint.h> |
| |
| namespace android { |
| |
| struct ABitReader { |
| ABitReader(const uint8_t *data, size_t size); |
| |
| uint32_t getBits(size_t n); |
| void skipBits(size_t n); |
| |
| void putBits(uint32_t x, size_t n); |
| |
| size_t numBitsLeft() const; |
| |
| const uint8_t *data() const; |
| |
| private: |
| const uint8_t *mData; |
| size_t mSize; |
| |
| uint32_t mReservoir; // left-aligned bits |
| size_t mNumBitsLeft; |
| |
| void fillReservoir(); |
| |
| DISALLOW_EVIL_CONSTRUCTORS(ABitReader); |
| }; |
| |
| } // namespace android |
| |
| #endif // A_BIT_READER_H_ |