1 /* 2 * Copyright (c) 2013 The WebRTC project authors. All Rights Reserved. 3 * 4 * Use of this source code is governed by a BSD-style license 5 * that can be found in the LICENSE file in the root of the source 6 * tree. An additional intellectual property rights grant can be found 7 * in the file PATENTS. All contributing project authors may 8 * be found in the AUTHORS file in the root of the source tree. 9 */ 10 11 #ifndef WEBRTC_MODULES_AUDIO_DEVICE_ANDROID_SINGLE_RW_FIFO_H_ 12 #define WEBRTC_MODULES_AUDIO_DEVICE_ANDROID_SINGLE_RW_FIFO_H_ 13 14 #include "system_wrappers/include/atomic32.h" 15 #include "typedefs.h" 16 17 namespace webrtc { 18 19 // Implements a lock-free FIFO losely based on 20 // http://src.chromium.org/viewvc/chrome/trunk/src/media/base/audio_fifo.cc 21 // Note that this class assumes there is one producer (writer) and one 22 // consumer (reader) thread. 23 class SingleRwFifo { 24 public: 25 explicit SingleRwFifo(int capacity); 26 ~SingleRwFifo(); 27 28 void Push(int8_t* mem); 29 int8_t* Pop(); 30 31 void Clear(); 32 size()33 int size() { return size_.Value(); } capacity()34 int capacity() const { return capacity_; } 35 36 private: 37 std::unique_ptr<int8_t* []> queue_; 38 int capacity_; 39 40 Atomic32 size_; 41 42 int read_pos_; 43 int write_pos_; 44 }; 45 46 } // namespace webrtc 47 48 #endif // WEBRTC_MODULES_AUDIO_DEVICE_ANDROID_SINGLE_RW_FIFO_H_ 49