| /* |
| * Copyright (C) 2016 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| #ifndef AAUDIO_AAUDIO_STREAM_TRACKER_H |
| #define AAUDIO_AAUDIO_STREAM_TRACKER_H |
| |
| #include <time.h> |
| #include <pthread.h> |
| |
| #include <aaudio/AAudio.h> |
| |
| #include "binding/AAudioCommon.h" |
| |
| #include "AAudioServiceStreamBase.h" |
| |
| namespace aaudio { |
| |
| class AAudioStreamTracker { |
| |
| public: |
| /** |
| * Remove any streams with the matching handle. |
| * |
| * @param streamHandle |
| * @return number of streams removed |
| */ |
| int32_t removeStreamByHandle(aaudio_handle_t streamHandle); |
| |
| /** |
| * Look up a stream based on the handle. |
| * |
| * @param streamHandle |
| * @return strong pointer to the stream if found, or nullptr |
| */ |
| android::sp<aaudio::AAudioServiceStreamBase> getStreamByHandle( |
| aaudio_handle_t streamHandle); |
| |
| /** |
| * Look up a stream based on the AudioPolicy portHandle. |
| * Increment its service reference count if found. |
| * |
| * @param portHandle |
| * @return strong pointer to the stream if found, or nullptr |
| */ |
| android::sp<aaudio::AAudioServiceStreamBase> findStreamByPortHandle( |
| audio_port_handle_t portHandle); |
| |
| /** |
| * Store a strong pointer to the stream and return a unique handle for future reference. |
| * The handle is guaranteed not to collide with an existing stream. |
| * @param serviceStream |
| * @return handle for identifying the stream |
| */ |
| aaudio_handle_t addStreamForHandle(android::sp<AAudioServiceStreamBase> serviceStream); |
| |
| /** |
| * @return string that can be added to dumpsys |
| */ |
| std::string dump() const; |
| |
| private: |
| static aaudio_handle_t bumpHandle(aaudio_handle_t handle); |
| |
| // Track stream using a unique handle that wraps. Only use positive half. |
| mutable std::mutex mHandleLock; |
| // protected by mHandleLock |
| aaudio_handle_t mPreviousHandle = 0; |
| // protected by mHandleLock |
| std::map<aaudio_handle_t, android::sp<aaudio::AAudioServiceStreamBase>> mStreamsByHandle; |
| }; |
| |
| |
| } /* namespace aaudio */ |
| |
| #endif /* AAUDIO_AAUDIO_STREAM_TRACKER_H */ |