mediascanner.h revision 2ffcb6c4fe5be89b38b72803182cbc5f3fbad43a 
1/*
2 * Copyright (C) 2008 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 MEDIASCANNER_H
18#define MEDIASCANNER_H
19
20#include <utils/Log.h>
21#include <utils/threads.h>
22#include <utils/List.h>
23#include <utils/Errors.h>
24#include <pthread.h>
25
26namespace android {
27
28class MediaScannerClient;
29class StringArray;
30
31class MediaScanner
32{
33public:
34    MediaScanner();
35    ~MediaScanner();
36
37    typedef bool (*ExceptionCheck)(void* env);
38
39    status_t processFile(const char *path, const char *mimeType, MediaScannerClient& client);
40    status_t processDirectory(const char *path, const char* extensions,
41            MediaScannerClient& client, ExceptionCheck exceptionCheck, void* exceptionEnv);
42    void setLocale(const char* locale);
43
44    // extracts album art as a block of data
45    char* extractAlbumArt(int fd);
46
47    static void uninitializeForThread();
48
49private:
50    status_t doProcessDirectory(char *path, int pathRemaining, const char* extensions,
51            MediaScannerClient& client, ExceptionCheck exceptionCheck, void* exceptionEnv);
52    void initializeForThread();
53
54    // current locale (like "ja_JP"), created/destroyed with strdup()/free()
55    char* mLocale;
56};
57
58
59class MediaScannerClient
60{
61public:
62    MediaScannerClient();
63    virtual ~MediaScannerClient();
64    void setLocale(const char* locale);
65    void beginFile();
66    bool addStringTag(const char* name, const char* value);
67    void endFile();
68
69    virtual bool scanFile(const char* path, long long lastModified, long long fileSize) = 0;
70    virtual bool handleStringTag(const char* name, const char* value) = 0;
71    virtual bool setMimeType(const char* mimeType) = 0;
72    virtual bool addNoMediaFolder(const char* path) = 0;
73
74protected:
75    void convertValues(uint32_t encoding);
76
77protected:
78    // cached name and value strings, for native encoding support.
79    StringArray*    mNames;
80    StringArray*    mValues;
81
82    // default encoding based on MediaScanner::mLocale string
83    uint32_t        mLocaleEncoding;
84};
85
86}; // namespace android
87
88#endif // MEDIASCANNER_H
89
90