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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:
MediaLogService()30      MediaLogService() : BnMediaLogService() { }
~MediaLogService()31      virtual ~MediaLogService() { }
onFirstRef()32      virtual void onFirstRef() { }
33  
getServiceName()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:
NamedReader()49          NamedReader() : mReader(0) { mName[0] = '\0'; } // for Vector
NamedReader(const sp<NBLog::Reader> & reader,const char * name)50          NamedReader(const sp<NBLog::Reader>& reader, const char *name) : mReader(reader)
51              { strlcpy(mName, name, sizeof(mName)); }
~NamedReader()52          ~NamedReader() { }
reader()53          const sp<NBLog::Reader>&  reader() const { return mReader; }
name()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