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      1 /*
      2  * Copyright (C) 2013 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_MEDIA_LOG_SERVICE_H
     18 #define ANDROID_MEDIA_LOG_SERVICE_H
     19 
     20 #include <binder/BinderService.h>
     21 #include <media/IMediaLogService.h>
     22 #include <media/nbaio/NBLog.h>
     23 
     24 namespace android {
     25 
     26 class MediaLogService : public BinderService<MediaLogService>, public BnMediaLogService
     27 {
     28     friend class BinderService<MediaLogService>;    // for MediaLogService()
     29 public:
     30     MediaLogService() : BnMediaLogService() { }
     31     virtual ~MediaLogService() { }
     32     virtual void onFirstRef() { }
     33 
     34     static const char*  getServiceName() { return "media.log"; }
     35 
     36     static const size_t kMinSize = 0x100;
     37     static const size_t kMaxSize = 0x10000;
     38     virtual void        registerWriter(const sp<IMemory>& shared, size_t size, const char *name);
     39     virtual void        unregisterWriter(const sp<IMemory>& shared);
     40 
     41     virtual status_t    dump(int fd, const Vector<String16>& args);
     42     virtual status_t    onTransact(uint32_t code, const Parcel& data, Parcel* reply,
     43                                 uint32_t flags);
     44 
     45 private:
     46     Mutex               mLock;
     47     class NamedReader {
     48     public:
     49         NamedReader() : mReader(0) { mName[0] = '\0'; } // for Vector
     50         NamedReader(const sp<NBLog::Reader>& reader, const char *name) : mReader(reader)
     51             { strlcpy(mName, name, sizeof(mName)); }
     52         ~NamedReader() { }
     53         const sp<NBLog::Reader>&  reader() const { return mReader; }
     54         const char*               name() const { return mName; }
     55     private:
     56         sp<NBLog::Reader>   mReader;
     57         static const size_t kMaxName = 32;
     58         char                mName[kMaxName];
     59     };
     60     Vector<NamedReader> mNamedReaders;
     61 };
     62 
     63 }   // namespace android
     64 
     65 #endif  // ANDROID_MEDIA_LOG_SERVICE_H
     66