ID3.h revision 83e5850bdf9c8b5c36c364b367b039674eb827ad 
1/*
2 * Copyright (C) 2010 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 ID3_H_
18
19#define ID3_H_
20
21#include <utils/RefBase.h>
22
23namespace android {
24
25struct DataSource;
26struct String8;
27
28struct ID3 {
29    enum Version {
30        ID3_UNKNOWN,
31        ID3_V1,
32        ID3_V1_1,
33        ID3_V2_2,
34        ID3_V2_3
35    };
36
37    ID3(const sp<DataSource> &source);
38    ~ID3();
39
40    bool isValid() const;
41
42    Version version() const;
43
44    const void *getAlbumArt(size_t *length, String8 *mime) const;
45
46    struct Iterator {
47        Iterator(const ID3 &parent, const char *id);
48        ~Iterator();
49
50        bool done() const;
51        void getID(String8 *id) const;
52        void getString(String8 *s) const;
53        const uint8_t *getData(size_t *length) const;
54        void next();
55
56    private:
57        const ID3 &mParent;
58        char *mID;
59        size_t mOffset;
60
61        const uint8_t *mFrameData;
62        size_t mFrameSize;
63
64        void findFrame();
65
66        size_t getHeaderLength() const;
67
68        Iterator(const Iterator &);
69        Iterator &operator=(const Iterator &);
70    };
71
72private:
73    bool mIsValid;
74    uint8_t *mData;
75    size_t mSize;
76    size_t mFirstFrameOffset;
77    Version mVersion;
78
79    bool parseV1(const sp<DataSource> &source);
80    bool parseV2(const sp<DataSource> &source);
81    void removeUnsynchronization();
82
83    ID3(const ID3 &);
84    ID3 &operator=(const ID3 &);
85};
86
87}  // namespace android
88
89#endif  // ID3_H_
90
91