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();
31    virtual ~MediaLogService() override;
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    virtual void        requestMergeWakeup() override;
46
47private:
48
49    // Internal dump
50    static const int kDumpLockRetries = 50;
51    static const int kDumpLockSleepUs = 20000;
52    static const size_t kMergeBufferSize = 16 * 1024; // TODO determine good value for this
53    static bool dumpTryLock(Mutex& mutex);
54
55    Mutex               mLock;
56
57    Vector<NBLog::NamedReader> mNamedReaders;
58    NBLog::Shared *mMergerShared;
59    NBLog::Merger mMerger;
60    NBLog::MergeReader mMergeReader;
61    const sp<NBLog::MergeThread> mMergeThread;
62};
63
64}   // namespace android
65
66#endif  // ANDROID_MEDIA_LOG_SERVICE_H
67