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 AAUDIO_FIXED_BLOCK_WRITER_H 18 #define AAUDIO_FIXED_BLOCK_WRITER_H 19 20 #include <stdint.h> 21 22 #include "FixedBlockAdapter.h" 23 24 /** 25 * This can be used to convert a push data flow from variable sized buffers to fixed sized buffers. 26 * An example would be an audio input callback. 27 */ 28 class FixedBlockWriter : public FixedBlockAdapter 29 { 30 public: 31 FixedBlockWriter(FixedBlockProcessor &fixedBlockProcessor); 32 33 virtual ~FixedBlockWriter() = default; 34 35 /** 36 * Write from a variable sized block. 37 * 38 * Note that if the fixed-sized blocks must be aligned, then the variable-sized blocks 39 * must have the same alignment. 40 * For example, if the fixed-size blocks must be a multiple of 8, then the variable-sized 41 * blocks must also be a multiple of 8. 42 * 43 * @param buffer 44 * @param numBytes 45 * @return Number of bytes written or a negative error code. 46 */ 47 int32_t write(uint8_t *buffer, int32_t numBytes); 48 49 private: 50 51 int32_t writeToStorage(uint8_t *buffer, int32_t numBytes); 52 }; 53 54 #endif /* AAUDIO_FIXED_BLOCK_WRITER_H */ 55