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_SERVICE_ENDPOINT_H 18 #define AAUDIO_SERVICE_ENDPOINT_H 19 20 #include <atomic> 21 #include <functional> 22 #include <mutex> 23 #include <vector> 24 25 #include "client/AudioStreamInternal.h" 26 #include "client/AudioStreamInternalPlay.h" 27 #include "core/AAudioStreamParameters.h" 28 #include "binding/AAudioServiceMessage.h" 29 #include "binding/AAudioStreamConfiguration.h" 30 31 #include "AAudioServiceStreamBase.h" 32 33 namespace aaudio { 34 35 /** 36 * AAudioServiceEndpoint is used by a subclass of AAudioServiceStreamBase 37 * to communicate with the underlying audio device or port. 38 */ 39 class AAudioServiceEndpoint 40 : public virtual android::RefBase 41 , public AAudioStreamParameters { 42 public: 43 44 virtual ~AAudioServiceEndpoint(); 45 46 virtual std::string dump() const; 47 48 virtual aaudio_result_t open(const aaudio::AAudioStreamRequest &request) = 0; 49 50 virtual aaudio_result_t close() = 0; 51 52 aaudio_result_t registerStream(android::sp<AAudioServiceStreamBase> stream); 53 54 aaudio_result_t unregisterStream(android::sp<AAudioServiceStreamBase> stream); 55 56 virtual aaudio_result_t startStream(android::sp<AAudioServiceStreamBase> stream, 57 audio_port_handle_t *clientHandle) = 0; 58 59 virtual aaudio_result_t stopStream(android::sp<AAudioServiceStreamBase> stream, 60 audio_port_handle_t clientHandle) = 0; 61 startClient(const android::AudioClient & client,audio_port_handle_t * clientHandle)62 virtual aaudio_result_t startClient(const android::AudioClient& client, 63 audio_port_handle_t *clientHandle) { 64 ALOGD("AAudioServiceEndpoint::startClient(%p, ...) AAUDIO_ERROR_UNAVAILABLE", &client); 65 return AAUDIO_ERROR_UNAVAILABLE; 66 } 67 stopClient(audio_port_handle_t clientHandle)68 virtual aaudio_result_t stopClient(audio_port_handle_t clientHandle) { 69 ALOGD("AAudioServiceEndpoint::stopClient(...) AAUDIO_ERROR_UNAVAILABLE"); 70 return AAUDIO_ERROR_UNAVAILABLE; 71 } 72 73 /** 74 * @param positionFrames 75 * @param timeNanos 76 * @return AAUDIO_OK or AAUDIO_ERROR_UNAVAILABLE or other negative error 77 */ 78 virtual aaudio_result_t getFreeRunningPosition(int64_t *positionFrames, int64_t *timeNanos) = 0; 79 80 virtual aaudio_result_t getTimestamp(int64_t *positionFrames, int64_t *timeNanos) = 0; 81 getFramesPerBurst()82 int32_t getFramesPerBurst() const { 83 return mFramesPerBurst; 84 } 85 getRequestedDeviceId()86 int32_t getRequestedDeviceId() const { return mRequestedDeviceId; } 87 88 bool matches(const AAudioStreamConfiguration& configuration); 89 90 // This should only be called from the AAudioEndpointManager under a mutex. getOpenCount()91 int32_t getOpenCount() const { 92 return mOpenCount; 93 } 94 95 // This should only be called from the AAudioEndpointManager under a mutex. setOpenCount(int32_t count)96 void setOpenCount(int32_t count) { 97 mOpenCount = count; 98 } 99 100 protected: 101 void disconnectRegisteredStreams(); 102 103 mutable std::mutex mLockStreams; 104 std::vector<android::sp<AAudioServiceStreamBase>> mRegisteredStreams; 105 106 SimpleDoubleBuffer<Timestamp> mAtomicTimestamp; 107 108 android::AudioClient mMmapClient; // set in open, used in open and startStream 109 110 int32_t mFramesPerBurst = 0; 111 int32_t mOpenCount = 0; 112 int32_t mRequestedDeviceId = 0; 113 114 }; 115 116 } /* namespace aaudio */ 117 118 119 #endif //AAUDIO_SERVICE_ENDPOINT_H 120