Home | History | Annotate | Download | only in oboeservice 
      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 ANDROID_AAUDIO_AAUDIO_CLIENT_TRACKER_H
     18 #define ANDROID_AAUDIO_AAUDIO_CLIENT_TRACKER_H
     19 
     20 #include <map>
     21 #include <mutex>
     22 #include <set>
     23 
     24 #include <utils/Singleton.h>
     25 
     26 #include <aaudio/AAudio.h>
     27 #include "binding/IAAudioClient.h"
     28 #include "AAudioService.h"
     29 
     30 namespace aaudio {
     31 
     32 class AAudioClientTracker : public android::Singleton<AAudioClientTracker>{
     33 public:
     34     AAudioClientTracker();
     35     ~AAudioClientTracker() = default;
     36 
     37     /**
     38      * Returns information about the state of the this class.
     39      *
     40      * Will attempt to get the object lock, but will proceed
     41      * even if it cannot.
     42      *
     43      * Each line of information ends with a newline.
     44      *
     45      * @return a string with useful information
     46      */
     47     std::string dump() const;
     48 
     49     aaudio_result_t registerClient(pid_t pid, const android::sp<android::IAAudioClient>& client);
     50 
     51     void unregisterClient(pid_t pid);
     52 
     53     int32_t getStreamCount(pid_t pid);
     54 
     55     aaudio_result_t registerClientStream(pid_t pid,
     56                                          android::sp<AAudioServiceStreamBase> serviceStream);
     57 
     58     aaudio_result_t unregisterClientStream(pid_t pid,
     59                                            android::sp<AAudioServiceStreamBase> serviceStream);
     60 
     61     android::AAudioService *getAAudioService() const {
     62         return mAAudioService;
     63     }
     64 
     65     void setAAudioService(android::AAudioService *aaudioService) {
     66         mAAudioService = aaudioService;
     67     }
     68 
     69 private:
     70 
     71     /**
     72      * One per process.
     73      */
     74     class NotificationClient : public IBinder::DeathRecipient {
     75     public:
     76         NotificationClient(pid_t pid);
     77         virtual ~NotificationClient();
     78 
     79         int32_t getStreamCount();
     80 
     81         std::string dump() const;
     82 
     83         aaudio_result_t registerClientStream(android::sp<AAudioServiceStreamBase> serviceStream);
     84 
     85         aaudio_result_t unregisterClientStream(android::sp<AAudioServiceStreamBase> serviceStream);
     86 
     87         // IBinder::DeathRecipient
     88         virtual     void    binderDied(const android::wp<IBinder>& who);
     89 
     90     protected:
     91         mutable std::mutex                              mLock;
     92         const pid_t                                     mProcessId;
     93         std::set<android::sp<AAudioServiceStreamBase>>  mStreams;
     94     };
     95 
     96     mutable std::mutex                               mLock;
     97     std::map<pid_t, android::sp<NotificationClient>> mNotificationClients;
     98     android::AAudioService                          *mAAudioService = nullptr;
     99 };
    100 
    101 } /* namespace aaudio */
    102 
    103 #endif //ANDROID_AAUDIO_AAUDIO_CLIENT_TRACKER_H
    104