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_MMAP_H 18 #define AAUDIO_SERVICE_ENDPOINT_MMAP_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 "binding/AAudioServiceMessage.h" 28 #include "AAudioServiceEndpointShared.h" 29 #include "AAudioServiceStreamShared.h" 30 #include "AAudioServiceStreamMMAP.h" 31 #include "AAudioMixer.h" 32 #include "AAudioService.h" 33 #include "SharedMemoryWrapper.h" 34 35 namespace aaudio { 36 37 /** 38 * This is used by AAudioServiceStreamMMAP to access the MMAP devices 39 * through AudioFlinger. 40 */ 41 class AAudioServiceEndpointMMAP 42 : public AAudioServiceEndpoint 43 , public android::MmapStreamCallback { 44 45 public: 46 explicit AAudioServiceEndpointMMAP(android::AAudioService &audioService); 47 48 ~AAudioServiceEndpointMMAP() override = default; 49 50 std::string dump() const override; 51 52 aaudio_result_t open(const aaudio::AAudioStreamRequest &request) override; 53 54 void close() override; 55 56 aaudio_result_t startStream(android::sp<AAudioServiceStreamBase> stream, 57 audio_port_handle_t *clientHandle) override; 58 59 aaudio_result_t stopStream(android::sp<AAudioServiceStreamBase> stream, 60 audio_port_handle_t clientHandle) override; 61 62 aaudio_result_t startClient(const android::AudioClient& client, 63 const audio_attributes_t *attr, 64 audio_port_handle_t *clientHandle) override; 65 66 aaudio_result_t stopClient(audio_port_handle_t clientHandle) override; 67 68 aaudio_result_t standby() override; 69 70 aaudio_result_t exitStandby(AudioEndpointParcelable* parcelable) override; 71 72 aaudio_result_t getFreeRunningPosition(int64_t *positionFrames, int64_t *timeNanos) override; 73 74 aaudio_result_t getTimestamp(int64_t *positionFrames, int64_t *timeNanos) override; 75 76 void handleTearDownAsync(audio_port_handle_t portHandle); 77 78 // -------------- Callback functions for MmapStreamCallback --------------------- 79 void onTearDown(audio_port_handle_t portHandle) override; 80 81 void onVolumeChanged(float volume) override; 82 83 void onRoutingChanged(audio_port_handle_t portHandle) override; 84 // ------------------------------------------------------------------------------ 85 86 aaudio_result_t getDownDataDescription(AudioEndpointParcelable* parcelable); 87 getHardwareTimeOffsetNanos()88 int64_t getHardwareTimeOffsetNanos() const { 89 return mHardwareTimeOffsetNanos; 90 } 91 92 aaudio_result_t getExternalPosition(uint64_t *positionFrames, int64_t *timeNanos); 93 94 int64_t nextDataReportTime(); 95 96 void reportData(); 97 98 private: 99 100 aaudio_result_t openWithFormat(audio_format_t audioFormat, audio_format_t* nextFormatToTry); 101 102 aaudio_result_t createMmapBuffer(); 103 104 MonotonicCounter mFramesTransferred; 105 106 // Interface to the AudioFlinger MMAP support. 107 android::sp<android::MmapStreamInterface> mMmapStream; 108 struct audio_mmap_buffer_info mMmapBufferinfo; 109 110 // There is only one port associated with an MMAP endpoint. 111 audio_port_handle_t mPortHandle = AUDIO_PORT_HANDLE_NONE; 112 113 android::AAudioService &mAAudioService; 114 115 std::unique_ptr<SharedMemoryWrapper> mAudioDataWrapper; 116 117 int64_t mHardwareTimeOffsetNanos = 0; // TODO get from HAL 118 119 aaudio_result_t mHalExternalPositionStatus = AAUDIO_OK; 120 uint64_t mLastPositionFrames = 0; 121 int64_t mTimestampNanosForLastPosition = 0; 122 int32_t mTimestampGracePeriodMs; 123 int32_t mFrozenPositionCount = 0; 124 int32_t mFrozenTimestampCount = 0; 125 int64_t mDataReportOffsetNanos = 0; 126 127 }; 128 129 } /* namespace aaudio */ 130 131 #endif //AAUDIO_SERVICE_ENDPOINT_MMAP_H 132 133