1 /* 2 * Copyright (c) 2021 Huawei Device Co., Ltd. 3 * Licensed under the Apache License, Version 2.0 (the "License"); 4 * you may not use this file except in compliance with the License. 5 * You may obtain a copy of the License at 6 * 7 * http://www.apache.org/licenses/LICENSE-2.0 8 * 9 * Unless required by applicable law or agreed to in writing, software 10 * distributed under the License is distributed on an "AS IS" BASIS, 11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 * See the License for the specific language governing permissions and 13 * limitations under the License. 14 */ 15 16 #ifndef STREAM_PACKETIZER_H 17 #define STREAM_PACKETIZER_H 18 19 #include "i_stream.h" 20 21 namespace Communication { 22 namespace SoftBus { 23 class StreamPacketizer { 24 public: StreamPacketizer(int streamType,std::unique_ptr<IStream> data)25 StreamPacketizer(int streamType, std::unique_ptr<IStream> data) 26 { 27 originData_ = std::move(data); 28 streamType_ = streamType; 29 } 30 virtual ~StreamPacketizer() = default; 31 32 ssize_t CalculateHeaderSize() const; 33 ssize_t CalculateExtSize(ssize_t extSize) const; 34 35 std::unique_ptr<char[]> PacketizeStream(); GetPacketLen()36 ssize_t GetPacketLen() const 37 { 38 return hdrSize_ + dataSize_ + extSize_; 39 } 40 GetHeaderLen()41 ssize_t GetHeaderLen() const 42 { 43 return hdrSize_ + extSize_; 44 } 45 46 private: 47 ssize_t hdrSize_ = 0; 48 ssize_t dataSize_ = 0; 49 ssize_t extSize_ = 0; 50 std::unique_ptr<IStream> originData_ = nullptr; 51 int streamType_ = INVALID; 52 }; 53 } // namespace SoftBus 54 } // namespace Communication 55 56 #endif 57