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155 lines
5.5 KiB
155 lines
5.5 KiB
/*
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* Copyright (C) 2019 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#pragma once
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#include <android-base/thread_annotations.h>
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#include "AnalyticsActions.h"
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#include "AnalyticsState.h"
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#include "TimedAction.h"
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#include "Wrap.h"
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namespace android::mediametrics {
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class AudioAnalytics
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{
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public:
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AudioAnalytics();
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~AudioAnalytics();
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/**
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* Returns success if AudioAnalytics recognizes item.
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*
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* AudioAnalytics requires the item key to start with "audio.".
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*
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* A trusted source can create a new key, an untrusted source
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* can only modify the key if the uid will match that authorized
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* on the existing key.
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*
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* \param item the item to be submitted.
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* \param isTrusted whether the transaction comes from a trusted source.
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* In this case, a trusted source is verified by binder
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* UID to be a system service by MediaMetrics service.
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* Do not use true if you haven't really checked!
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*
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* \return NO_ERROR on success,
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* PERMISSION_DENIED if the item cannot be put into the AnalyticsState,
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* BAD_VALUE if the item key does not start with "audio.".
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*/
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status_t submit(const std::shared_ptr<const mediametrics::Item>& item, bool isTrusted);
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/**
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* Returns a pair consisting of the dump string, and the number of lines in the string.
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*
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* The number of lines in the returned pair is used as an optimization
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* for subsequent line limiting.
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*
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* The TimeMachine and the TransactionLog are dumped separately under
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* different locks, so may not be 100% consistent with the last data
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* delivered.
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*
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* \param lines the maximum number of lines in the string returned.
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* \param sinceNs the nanoseconds since Unix epoch to start dump (0 shows all)
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* \param prefix the desired key prefix to match (nullptr shows all)
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*/
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std::pair<std::string, int32_t> dump(
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int32_t lines = INT32_MAX, int64_t sinceNs = 0, const char *prefix = nullptr) const;
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void clear() {
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// underlying state is locked.
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mPreviousAnalyticsState->clear();
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mAnalyticsState->clear();
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}
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private:
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/**
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* Checks for any pending actions for a particular item.
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*
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* \param item to check against the current AnalyticsActions.
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*/
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void checkActions(const std::shared_ptr<const mediametrics::Item>& item);
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// HELPER METHODS
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/**
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* Return the audio thread associated with an audio track name.
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* e.g. "audio.track.32" -> "audio.thread.10" if the associated
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* threadId for the audio track is 10.
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*/
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std::string getThreadFromTrack(const std::string& track) const;
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const bool mDeliverStatistics __unused = true;
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// Actions is individually locked
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AnalyticsActions mActions;
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// AnalyticsState is individually locked, and we use SharedPtrWrap
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// to allow safe access even if the shared pointer changes underneath.
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SharedPtrWrap<AnalyticsState> mAnalyticsState;
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SharedPtrWrap<AnalyticsState> mPreviousAnalyticsState;
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TimedAction mTimedAction; // locked internally
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// DeviceUse is a nested class which handles audio device usage accounting.
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// We define this class at the end to ensure prior variables all properly constructed.
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// TODO: Track / Thread interaction
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// TODO: Consider statistics aggregation.
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class DeviceUse {
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public:
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explicit DeviceUse(AudioAnalytics &audioAnalytics) : mAudioAnalytics{audioAnalytics} {}
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// Called every time an endAudioIntervalGroup message is received.
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void endAudioIntervalGroup(
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const std::shared_ptr<const android::mediametrics::Item> &item,
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bool isTrack) const;
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private:
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AudioAnalytics &mAudioAnalytics;
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} mDeviceUse{*this};
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// DeviceConnected is a nested class which handles audio device connection
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// We define this class at the end to ensure prior variables all properly constructed.
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// TODO: Track / Thread interaction
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// TODO: Consider statistics aggregation.
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class DeviceConnection {
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public:
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explicit DeviceConnection(AudioAnalytics &audioAnalytics)
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: mAudioAnalytics{audioAnalytics} {}
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// Called every time an endAudioIntervalGroup message is received.
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void a2dpConnected(
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const std::shared_ptr<const android::mediametrics::Item> &item);
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// Called when we have an AudioFlinger createPatch
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void createPatch(
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const std::shared_ptr<const android::mediametrics::Item> &item);
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// When the timer expires.
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void expire();
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private:
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AudioAnalytics &mAudioAnalytics;
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mutable std::mutex mLock;
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int64_t mA2dpTimeConnectedNs GUARDED_BY(mLock) = 0;
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int32_t mA2dpConnectedAttempts GUARDED_BY(mLock) = 0;
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int32_t mA2dpConnectedSuccesses GUARDED_BY(mLock) = 0;
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int32_t mA2dpConnectedFailures GUARDED_BY(mLock) = 0;
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} mDeviceConnection{*this};
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};
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} // namespace android::mediametrics
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