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_AAUDIO_SERVICE_STREAM_SHARED_H 18 #define AAUDIO_AAUDIO_SERVICE_STREAM_SHARED_H 19 20 #include "fifo/FifoBuffer.h" 21 #include "binding/AAudioServiceMessage.h" 22 #include "binding/AAudioStreamRequest.h" 23 #include "binding/AAudioStreamConfiguration.h" 24 25 #include "AAudioService.h" 26 #include "AAudioServiceStreamBase.h" 27 28 namespace aaudio { 29 30 // We expect the queue to only have a few commands. 31 // This should be way more than we need. 32 #define QUEUE_UP_CAPACITY_COMMANDS (128) 33 34 class AAudioEndpointManager; 35 class AAudioServiceEndpoint; 36 class SharedRingBuffer; 37 38 /** 39 * One of these is created for every MODE_SHARED stream in the AAudioService. 40 * 41 * Each Shared stream will register itself with an AAudioServiceEndpoint when it is opened. 42 */ 43 class AAudioServiceStreamShared : public AAudioServiceStreamBase { 44 45 public: 46 AAudioServiceStreamShared(android::AAudioService &aAudioService); 47 virtual ~AAudioServiceStreamShared(); 48 49 aaudio_result_t open(const aaudio::AAudioStreamRequest &request, 50 aaudio::AAudioStreamConfiguration &configurationOutput) override; 51 52 /** 53 * Start the flow of audio data. 54 * 55 * This is not guaranteed to be synchronous but it currently is. 56 * An AAUDIO_SERVICE_EVENT_STARTED will be sent to the client when complete. 57 */ 58 aaudio_result_t start() override; 59 60 /** 61 * Stop the flow of data so that start() can resume without loss of data. 62 * 63 * This is not guaranteed to be synchronous but it currently is. 64 * An AAUDIO_SERVICE_EVENT_PAUSED will be sent to the client when complete. 65 */ 66 aaudio_result_t pause() override; 67 68 /** 69 * Stop the flow of data after data in buffer has played. 70 */ 71 aaudio_result_t stop() override; 72 73 /** 74 * Discard any data held by the underlying HAL or Service. 75 * 76 * This is not guaranteed to be synchronous but it currently is. 77 * An AAUDIO_SERVICE_EVENT_FLUSHED will be sent to the client when complete. 78 */ 79 aaudio_result_t flush() override; 80 81 aaudio_result_t close() override; 82 getDataFifoBuffer()83 android::FifoBuffer *getDataFifoBuffer() { return mAudioDataQueue->getFifoBuffer(); } 84 85 /* Keep a record of when a buffer transfer completed. 86 * This allows for a more accurate timing model. 87 */ 88 void markTransferTime(int64_t nanoseconds); 89 90 void onStop(); 91 92 void onDisconnect(); 93 94 protected: 95 96 aaudio_result_t getDownDataDescription(AudioEndpointParcelable &parcelable) override; 97 98 aaudio_result_t getFreeRunningPosition(int64_t *positionFrames, int64_t *timeNanos) override; 99 100 private: 101 android::AAudioService &mAudioService; 102 AAudioServiceEndpoint *mServiceEndpoint = nullptr; 103 SharedRingBuffer *mAudioDataQueue = nullptr; 104 105 int64_t mMarkedPosition = 0; 106 int64_t mMarkedTime = 0; 107 }; 108 109 } /* namespace aaudio */ 110 111 #endif //AAUDIO_AAUDIO_SERVICE_STREAM_SHARED_H 112