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 34 namespace aaudio { 35 36 /** 37 * This is used by AAudioServiceStreamMMAP to access the MMAP devices 38 * through AudioFlinger. 39 */ 40 class AAudioServiceEndpointMMAP 41 : public AAudioServiceEndpoint 42 , public android::MmapStreamCallback { 43 44 public: 45 explicit AAudioServiceEndpointMMAP(android::AAudioService &audioService); 46 47 virtual ~AAudioServiceEndpointMMAP() = default; 48 49 std::string dump() const override; 50 51 aaudio_result_t open(const aaudio::AAudioStreamRequest &request) override; 52 53 void close() override; 54 55 aaudio_result_t startStream(android::sp<AAudioServiceStreamBase> stream, 56 audio_port_handle_t *clientHandle) override; 57 58 aaudio_result_t stopStream(android::sp<AAudioServiceStreamBase> stream, 59 audio_port_handle_t clientHandle) override; 60 61 aaudio_result_t startClient(const android::AudioClient& client, 62 const audio_attributes_t *attr, 63 audio_port_handle_t *clientHandle) override; 64 65 aaudio_result_t stopClient(audio_port_handle_t clientHandle) override; 66 67 aaudio_result_t standby() override; 68 69 aaudio_result_t exitStandby(AudioEndpointParcelable* parcelable) override; 70 71 aaudio_result_t getFreeRunningPosition(int64_t *positionFrames, int64_t *timeNanos) override; 72 73 aaudio_result_t getTimestamp(int64_t *positionFrames, int64_t *timeNanos) override; 74 75 void handleTearDownAsync(audio_port_handle_t portHandle); 76 77 // -------------- Callback functions for MmapStreamCallback --------------------- 78 void onTearDown(audio_port_handle_t portHandle) override; 79 80 void onVolumeChanged(audio_channel_mask_t channels, 81 android::Vector<float> values) 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 private: 95 96 aaudio_result_t openWithFormat(audio_format_t audioFormat); 97 98 aaudio_result_t createMmapBuffer(android::base::unique_fd* fileDescriptor); 99 100 MonotonicCounter mFramesTransferred; 101 102 // Interface to the AudioFlinger MMAP support. 103 android::sp<android::MmapStreamInterface> mMmapStream; 104 struct audio_mmap_buffer_info mMmapBufferinfo; 105 106 // There is only one port associated with an MMAP endpoint. 107 audio_port_handle_t mPortHandle = AUDIO_PORT_HANDLE_NONE; 108 109 android::AAudioService &mAAudioService; 110 111 android::base::unique_fd mAudioDataFileDescriptor; 112 113 int64_t mHardwareTimeOffsetNanos = 0; // TODO get from HAL 114 115 aaudio_result_t mHalExternalPositionStatus = AAUDIO_OK; 116 uint64_t mLastPositionFrames = 0; 117 int64_t mTimestampNanosForLastPosition = 0; 118 int32_t mTimestampGracePeriodMs; 119 int32_t mFrozenPositionCount = 0; 120 int32_t mFrozenTimestampCount = 0; 121 122 }; 123 124 } /* namespace aaudio */ 125 126 #endif //AAUDIO_SERVICE_ENDPOINT_MMAP_H 127 128