1 /* 2 * Copyright (c) 2025 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 RING_BUFFER_HANDLER_H 17 #define RING_BUFFER_HANDLER_H 18 19 #include <string> 20 #include <mutex> 21 #include "common/hdi_adapter_info.h" 22 23 namespace OHOS { 24 namespace AudioStandard { 25 class RingBufferHandler { 26 public: 27 RingBufferHandler() = default; 28 ~RingBufferHandler(); 29 30 void Init(const uint32_t sampleRate, const uint32_t channelCount, const uint32_t formatBytes, 31 const uint32_t onceFrameNum = DEFAULT_ONCE_FRAME_NUM, const uint32_t maxFrameNum = DEFAULT_MAX_FRAME_NUM); 32 int32_t WriteDataToRingBuffer(uint8_t *data, uint32_t dataLen); 33 int32_t ReadDataFromRingBuffer(uint8_t *data, uint32_t dataLen); 34 35 private: 36 void AddWriteIndex(void); 37 void AddReadIndex(void); 38 39 private: 40 static constexpr int32_t DEFAULT_ONCE_FRAME_NUM = 2; 41 static constexpr int32_t DEFAULT_MAX_FRAME_NUM = 5; 42 static constexpr int32_t PER_FRAME_LENGTH_RATE = 100; 43 44 uint8_t *buffer_ = nullptr; 45 uint32_t maxBufferSize_ = 0; 46 uint32_t perFrameLength_ = 0; 47 uint32_t maxFrameNum_ = 0; 48 uint64_t readIdx_ = 0; 49 uint64_t writeIdx_ = 0; 50 std::mutex mutex_; 51 }; 52 53 } // namespace AudioStandard 54 } // namespace OHOS 55 56 #endif // RING_BUFFER_HANDLER_H 57