MetaData.h revision f5ab57c2d5e02af7483c94eddb177e4f5c9e9892
1/* 2 * Copyright (C) 2009 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 META_DATA_H_ 18 19#define META_DATA_H_ 20 21#include <sys/types.h> 22 23#include <stdint.h> 24 25#include <utils/RefBase.h> 26#include <utils/KeyedVector.h> 27 28namespace android { 29 30// The following keys map to int32_t data unless indicated otherwise. 31enum { 32 kKeyMIMEType = 'mime', // cstring 33 kKeyWidth = 'widt', // int32_t 34 kKeyHeight = 'heig', // int32_t 35 36 // a rectangle, if absent assumed to be (0, 0, width - 1, height - 1) 37 kKeyCropRect = 'crop', 38 39 kKeyRotation = 'rotA', // int32_t (angle in degrees) 40 kKeyIFramesInterval = 'ifiv', // int32_t 41 kKeyStride = 'strd', // int32_t 42 kKeySliceHeight = 'slht', // int32_t 43 kKeyChannelCount = '#chn', // int32_t 44 kKeySampleRate = 'srte', // int32_t (audio sampling rate Hz) 45 kKeyFrameRate = 'frmR', // int32_t (video frame rate fps) 46 kKeyBitRate = 'brte', // int32_t (bps) 47 kKeyESDS = 'esds', // raw data 48 kKeyAVCC = 'avcc', // raw data 49 kKeyVorbisInfo = 'vinf', // raw data 50 kKeyVorbisBooks = 'vboo', // raw data 51 kKeyWantsNALFragments = 'NALf', 52 kKeyIsSyncFrame = 'sync', // int32_t (bool) 53 kKeyIsCodecConfig = 'conf', // int32_t (bool) 54 kKeyTime = 'time', // int64_t (usecs) 55 kKeyNTPTime = 'ntpT', // uint64_t (ntp-timestamp) 56 kKeyTargetTime = 'tarT', // int64_t (usecs) 57 kKeyDriftTime = 'dftT', // int64_t (usecs) 58 kKeyAnchorTime = 'ancT', // int64_t (usecs) 59 kKeyDuration = 'dura', // int64_t (usecs) 60 kKeyColorFormat = 'colf', 61 kKeyPlatformPrivate = 'priv', // pointer 62 kKeyDecoderComponent = 'decC', // cstring 63 kKeyBufferID = 'bfID', 64 kKeyMaxInputSize = 'inpS', 65 kKeyThumbnailTime = 'thbT', // int64_t (usecs) 66 kKeyTrackID = 'trID', 67 kKeyIsDRM = 'idrm', // int32_t (bool) 68 69 kKeyAlbum = 'albu', // cstring 70 kKeyArtist = 'arti', // cstring 71 kKeyAlbumArtist = 'aart', // cstring 72 kKeyComposer = 'comp', // cstring 73 kKeyGenre = 'genr', // cstring 74 kKeyTitle = 'titl', // cstring 75 kKeyYear = 'year', // cstring 76 kKeyAlbumArt = 'albA', // compressed image data 77 kKeyAlbumArtMIME = 'alAM', // cstring 78 kKeyAuthor = 'auth', // cstring 79 kKeyCDTrackNumber = 'cdtr', // cstring 80 kKeyDiscNumber = 'dnum', // cstring 81 kKeyDate = 'date', // cstring 82 kKeyWriter = 'writ', // cstring 83 kKeyTimeScale = 'tmsl', // int32_t 84 85 // video profile and level 86 kKeyVideoProfile = 'vprf', // int32_t 87 kKeyVideoLevel = 'vlev', // int32_t 88 89 // Set this key to enable authoring files in 64-bit offset 90 kKey64BitFileOffset = 'fobt', // int32_t (bool) 91 kKey2ByteNalLength = '2NAL', // int32_t (bool) 92 93 // Identify the file output format for authoring 94 // Please see <media/mediarecorder.h> for the supported 95 // file output formats. 96 kKeyFileType = 'ftyp', // int32_t 97 98 // Track authoring progress status 99 // kKeyTrackTimeStatus is used to track progress in elapsed time 100 kKeyTrackTimeStatus = 'tktm', // int64_t 101 102 kKeyNotRealTime = 'ntrt', // bool (int32_t) 103 104 // Ogg files can be tagged to be automatically looping... 105 kKeyAutoLoop = 'autL', // bool (int32_t) 106 107 kKeyValidSamples = 'valD', // int32_t 108 109 kKeyIsUnreadable = 'unre', // bool (int32_t) 110 111 // An indication that a video buffer has been rendered. 112 kKeyRendered = 'rend', // bool (int32_t) 113}; 114 115enum { 116 kTypeESDS = 'esds', 117 kTypeAVCC = 'avcc', 118}; 119 120class MetaData : public RefBase { 121public: 122 MetaData(); 123 MetaData(const MetaData &from); 124 125 enum Type { 126 TYPE_NONE = 'none', 127 TYPE_C_STRING = 'cstr', 128 TYPE_INT32 = 'in32', 129 TYPE_INT64 = 'in64', 130 TYPE_FLOAT = 'floa', 131 TYPE_POINTER = 'ptr ', 132 TYPE_RECT = 'rect', 133 }; 134 135 void clear(); 136 bool remove(uint32_t key); 137 138 bool setCString(uint32_t key, const char *value); 139 bool setInt32(uint32_t key, int32_t value); 140 bool setInt64(uint32_t key, int64_t value); 141 bool setFloat(uint32_t key, float value); 142 bool setPointer(uint32_t key, void *value); 143 144 bool setRect( 145 uint32_t key, 146 int32_t left, int32_t top, 147 int32_t right, int32_t bottom); 148 149 bool findCString(uint32_t key, const char **value); 150 bool findInt32(uint32_t key, int32_t *value); 151 bool findInt64(uint32_t key, int64_t *value); 152 bool findFloat(uint32_t key, float *value); 153 bool findPointer(uint32_t key, void **value); 154 155 bool findRect( 156 uint32_t key, 157 int32_t *left, int32_t *top, 158 int32_t *right, int32_t *bottom); 159 160 bool setData(uint32_t key, uint32_t type, const void *data, size_t size); 161 162 bool findData(uint32_t key, uint32_t *type, 163 const void **data, size_t *size) const; 164 165protected: 166 virtual ~MetaData(); 167 168private: 169 struct typed_data { 170 typed_data(); 171 ~typed_data(); 172 173 typed_data(const MetaData::typed_data &); 174 typed_data &operator=(const MetaData::typed_data &); 175 176 void clear(); 177 void setData(uint32_t type, const void *data, size_t size); 178 void getData(uint32_t *type, const void **data, size_t *size) const; 179 180 private: 181 uint32_t mType; 182 size_t mSize; 183 184 union { 185 void *ext_data; 186 float reservoir; 187 } u; 188 189 bool usesReservoir() const { 190 return mSize <= sizeof(u.reservoir); 191 } 192 193 void allocateStorage(size_t size); 194 void freeStorage(); 195 196 void *storage() { 197 return usesReservoir() ? &u.reservoir : u.ext_data; 198 } 199 200 const void *storage() const { 201 return usesReservoir() ? &u.reservoir : u.ext_data; 202 } 203 }; 204 205 struct Rect { 206 int32_t mLeft, mTop, mRight, mBottom; 207 }; 208 209 KeyedVector<uint32_t, typed_data> mItems; 210 211 // MetaData &operator=(const MetaData &); 212}; 213 214} // namespace android 215 216#endif // META_DATA_H_ 217