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 23 namespace android { 24 25 class DataSourceBase; 26 class String8; 27 28 struct ID3 { 29 enum Version { 30 ID3_UNKNOWN, 31 ID3_V1, 32 ID3_V1_1, 33 ID3_V2_2, 34 ID3_V2_3, 35 ID3_V2_4, 36 }; 37 38 explicit ID3(DataSourceBase *source, bool ignoreV1 = false, off64_t offset = 0); 39 ID3(const uint8_t *data, size_t size, bool ignoreV1 = false); 40 ~ID3(); 41 42 bool isValid() const; 43 44 Version version() const; 45 46 const void *getAlbumArt(size_t *length, String8 *mime) const; 47 48 struct Iterator { 49 Iterator(const ID3 &parent, const char *id); 50 ~Iterator(); 51 52 bool done() const; 53 void getID(String8 *id) const; 54 void getString(String8 *s, String8 *ss = NULL) const; 55 const uint8_t *getData(size_t *length) const; 56 void next(); 57 58 private: 59 const ID3 &mParent; 60 char *mID; 61 size_t mOffset; 62 63 const uint8_t *mFrameData; 64 size_t mFrameSize; 65 66 void findFrame(); 67 68 size_t getHeaderLength() const; 69 void getstring(String8 *s, bool secondhalf) const; 70 71 Iterator(const Iterator &); 72 Iterator &operator=(const Iterator &); 73 }; 74 75 size_t rawSize() const { return mRawSize; } 76 77 private: 78 bool mIsValid; 79 uint8_t *mData; 80 size_t mSize; 81 size_t mFirstFrameOffset; 82 Version mVersion; 83 84 // size of the ID3 tag including header before any unsynchronization. 85 // only valid for IDV2+ 86 size_t mRawSize; 87 88 bool parseV1(DataSourceBase *source); 89 bool parseV2(DataSourceBase *source, off64_t offset); 90 void removeUnsynchronization(); 91 bool removeUnsynchronizationV2_4(bool iTunesHack); 92 93 static bool ParseSyncsafeInteger(const uint8_t encoded[4], size_t *x); 94 95 ID3(const ID3 &); 96 ID3 &operator=(const ID3 &); 97 }; 98 99 } // namespace android 100 101 #endif // ID3_H_ 102 103
