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
24namespace android {
25
26class MediaLogService : public BinderService<MediaLogService>, public BnMediaLogService
27{
28    friend class BinderService<MediaLogService>;    // for MediaLogService()
29public:
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
45private:
46
47    // Internal dump
48    static const int kDumpLockRetries = 50;
49    static const int kDumpLockSleepUs = 20000;
50    static bool dumpTryLock(Mutex& mutex);
51
52    Mutex               mLock;
53    class NamedReader {
54    public:
55        NamedReader() : mReader(0) { mName[0] = '\0'; } // for Vector
56        NamedReader(const sp<NBLog::Reader>& reader, const char *name) : mReader(reader)
57            { strlcpy(mName, name, sizeof(mName)); }
58        ~NamedReader() { }
59        const sp<NBLog::Reader>&  reader() const { return mReader; }
60        const char*               name() const { return mName; }
61    private:
62        sp<NBLog::Reader>   mReader;
63        static const size_t kMaxName = 32;
64        char                mName[kMaxName];
65    };
66    Vector<NamedReader> mNamedReaders;
67};
68
69}   // namespace android
70
71#endif  // ANDROID_MEDIA_LOG_SERVICE_H
72