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88 lines
2.6 KiB
88 lines
2.6 KiB
/*
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* Copyright (C) 2016 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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#ifndef AAUDIO_AAUDIO_STREAM_TRACKER_H
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#define AAUDIO_AAUDIO_STREAM_TRACKER_H
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#include <mutex>
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#include <time.h>
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#include <android-base/thread_annotations.h>
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#include <aaudio/AAudio.h>
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#include "binding/AAudioCommon.h"
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#include "AAudioServiceStreamBase.h"
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namespace aaudio {
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class AAudioStreamTracker {
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public:
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/**
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* Remove any streams with the matching handle.
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*
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* @param streamHandle
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* @return number of streams removed
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*/
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int32_t removeStreamByHandle(aaudio_handle_t streamHandle);
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/**
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* Look up a stream based on the handle.
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*
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* @param streamHandle
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* @return strong pointer to the stream if found, or nullptr
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*/
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android::sp<aaudio::AAudioServiceStreamBase> getStreamByHandle(
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aaudio_handle_t streamHandle);
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/**
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* Look up a stream based on the AudioPolicy portHandle.
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* Increment its service reference count if found.
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*
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* @param portHandle
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* @return strong pointer to the stream if found, or nullptr
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*/
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android::sp<aaudio::AAudioServiceStreamBase> findStreamByPortHandle(
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audio_port_handle_t portHandle);
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/**
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* Store a strong pointer to the stream and return a unique handle for future reference.
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* The handle is guaranteed not to collide with an existing stream.
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* @param serviceStream
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* @return handle for identifying the stream
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*/
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aaudio_handle_t addStreamForHandle(android::sp<AAudioServiceStreamBase> serviceStream);
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/**
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* @return string that can be added to dumpsys
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*/
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std::string dump() const;
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private:
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static aaudio_handle_t bumpHandle(aaudio_handle_t handle);
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// Track stream using a unique handle that wraps. Only use positive half.
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mutable std::mutex mHandleLock;
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aaudio_handle_t mPreviousHandle GUARDED_BY(mHandleLock) = 0;
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std::map<aaudio_handle_t, android::sp<aaudio::AAudioServiceStreamBase>>
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mStreamsByHandle GUARDED_BY(mHandleLock);
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};
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} /* namespace aaudio */
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#endif /* AAUDIO_AAUDIO_STREAM_TRACKER_H */
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