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(); 48 49 std::string dump() const override; 50 51 aaudio_result_t open(const aaudio::AAudioStreamRequest &request) override; 52 53 aaudio_result_t 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 audio_port_handle_t *clientHandle) override; 63 64 aaudio_result_t stopClient(audio_port_handle_t clientHandle) override; 65 66 aaudio_result_t getFreeRunningPosition(int64_t *positionFrames, int64_t *timeNanos) override; 67 68 aaudio_result_t getTimestamp(int64_t *positionFrames, int64_t *timeNanos) override; 69 70 // -------------- Callback functions for MmapStreamCallback --------------------- 71 void onTearDown(audio_port_handle_t handle) override; 72 73 void onVolumeChanged(audio_channel_mask_t channels, 74 android::Vector<float> values) override; 75 76 void onRoutingChanged(audio_port_handle_t deviceId) override; 77 // ------------------------------------------------------------------------------ 78 79 aaudio_result_t getDownDataDescription(AudioEndpointParcelable &parcelable); 80 getHardwareTimeOffsetNanos()81 int64_t getHardwareTimeOffsetNanos() const { 82 return mHardwareTimeOffsetNanos; 83 } 84 85 private: 86 MonotonicCounter mFramesTransferred; 87 88 // Interface to the AudioFlinger MMAP support. 89 android::sp<android::MmapStreamInterface> mMmapStream; 90 struct audio_mmap_buffer_info mMmapBufferinfo; 91 92 // There is only one port associated with an MMAP endpoint. 93 audio_port_handle_t mPortHandle = AUDIO_PORT_HANDLE_NONE; 94 95 android::AAudioService &mAAudioService; 96 97 android::base::unique_fd mAudioDataFileDescriptor; 98 99 int64_t mHardwareTimeOffsetNanos = 0; // TODO get from HAL 100 101 }; 102 103 } /* namespace aaudio */ 104 105 #endif //AAUDIO_SERVICE_ENDPOINT_MMAP_H 106 107