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 #include <utils/String8.h> 28 29 namespace android { 30 31 // The following keys map to int32_t data unless indicated otherwise. 32 enum { 33 kKeyMIMEType = 'mime', // cstring 34 kKeyWidth = 'widt', // int32_t, image pixel 35 kKeyHeight = 'heig', // int32_t, image pixel 36 kKeyDisplayWidth = 'dWid', // int32_t, display/presentation 37 kKeyDisplayHeight = 'dHgt', // int32_t, display/presentation 38 kKeySARWidth = 'sarW', // int32_t, sampleAspectRatio width 39 kKeySARHeight = 'sarH', // int32_t, sampleAspectRatio height 40 41 // a rectangle, if absent assumed to be (0, 0, width - 1, height - 1) 42 kKeyCropRect = 'crop', 43 44 kKeyRotation = 'rotA', // int32_t (angle in degrees) 45 kKeyIFramesInterval = 'ifiv', // int32_t 46 kKeyStride = 'strd', // int32_t 47 kKeySliceHeight = 'slht', // int32_t 48 kKeyChannelCount = '#chn', // int32_t 49 kKeyChannelMask = 'chnm', // int32_t 50 kKeySampleRate = 'srte', // int32_t (audio sampling rate Hz) 51 kKeyFrameRate = 'frmR', // int32_t (video frame rate fps) 52 kKeyBitRate = 'brte', // int32_t (bps) 53 kKeyESDS = 'esds', // raw data 54 kKeyAACProfile = 'aacp', // int32_t 55 kKeyAVCC = 'avcc', // raw data 56 kKeyD263 = 'd263', // raw data 57 kKeyVorbisInfo = 'vinf', // raw data 58 kKeyVorbisBooks = 'vboo', // raw data 59 kKeyWantsNALFragments = 'NALf', 60 kKeyIsSyncFrame = 'sync', // int32_t (bool) 61 kKeyIsCodecConfig = 'conf', // int32_t (bool) 62 kKeyTime = 'time', // int64_t (usecs) 63 kKeyDecodingTime = 'decT', // int64_t (decoding timestamp in usecs) 64 kKeyNTPTime = 'ntpT', // uint64_t (ntp-timestamp) 65 kKeyTargetTime = 'tarT', // int64_t (usecs) 66 kKeyDriftTime = 'dftT', // int64_t (usecs) 67 kKeyAnchorTime = 'ancT', // int64_t (usecs) 68 kKeyDuration = 'dura', // int64_t (usecs) 69 kKeyColorFormat = 'colf', 70 kKeyPlatformPrivate = 'priv', // pointer 71 kKeyDecoderComponent = 'decC', // cstring 72 kKeyBufferID = 'bfID', 73 kKeyMaxInputSize = 'inpS', 74 kKeyThumbnailTime = 'thbT', // int64_t (usecs) 75 kKeyTrackID = 'trID', 76 kKeyIsDRM = 'idrm', // int32_t (bool) 77 kKeyEncoderDelay = 'encd', // int32_t (frames) 78 kKeyEncoderPadding = 'encp', // int32_t (frames) 79 80 kKeyAlbum = 'albu', // cstring 81 kKeyArtist = 'arti', // cstring 82 kKeyAlbumArtist = 'aart', // cstring 83 kKeyComposer = 'comp', // cstring 84 kKeyGenre = 'genr', // cstring 85 kKeyTitle = 'titl', // cstring 86 kKeyYear = 'year', // cstring 87 kKeyAlbumArt = 'albA', // compressed image data 88 kKeyAlbumArtMIME = 'alAM', // cstring 89 kKeyAuthor = 'auth', // cstring 90 kKeyCDTrackNumber = 'cdtr', // cstring 91 kKeyDiscNumber = 'dnum', // cstring 92 kKeyDate = 'date', // cstring 93 kKeyWriter = 'writ', // cstring 94 kKeyCompilation = 'cpil', // cstring 95 kKeyLocation = 'loc ', // cstring 96 kKeyTimeScale = 'tmsl', // int32_t 97 98 // video profile and level 99 kKeyVideoProfile = 'vprf', // int32_t 100 kKeyVideoLevel = 'vlev', // int32_t 101 102 // Set this key to enable authoring files in 64-bit offset 103 kKey64BitFileOffset = 'fobt', // int32_t (bool) 104 kKey2ByteNalLength = '2NAL', // int32_t (bool) 105 106 // Identify the file output format for authoring 107 // Please see <media/mediarecorder.h> for the supported 108 // file output formats. 109 kKeyFileType = 'ftyp', // int32_t 110 111 // Track authoring progress status 112 // kKeyTrackTimeStatus is used to track progress in elapsed time 113 kKeyTrackTimeStatus = 'tktm', // int64_t 114 115 kKeyRealTimeRecording = 'rtrc', // bool (int32_t) 116 kKeyNumBuffers = 'nbbf', // int32_t 117 118 // Ogg files can be tagged to be automatically looping... 119 kKeyAutoLoop = 'autL', // bool (int32_t) 120 121 kKeyValidSamples = 'valD', // int32_t 122 123 kKeyIsUnreadable = 'unre', // bool (int32_t) 124 125 // An indication that a video buffer has been rendered. 126 kKeyRendered = 'rend', // bool (int32_t) 127 128 // The language code for this media 129 kKeyMediaLanguage = 'lang', // cstring 130 131 // To store the timed text format data 132 kKeyTextFormatData = 'text', // raw data 133 134 kKeyRequiresSecureBuffers = 'secu', // bool (int32_t) 135 136 kKeyIsADTS = 'adts', // bool (int32_t) 137 kKeyAACAOT = 'aaot', // int32_t 138 139 // If a MediaBuffer's data represents (at least partially) encrypted 140 // data, the following fields aid in decryption. 141 // The data can be thought of as pairs of plain and encrypted data 142 // fragments, i.e. plain and encrypted data alternate. 143 // The first fragment is by convention plain data (if that's not the 144 // case, simply specify plain fragment size of 0). 145 // kKeyEncryptedSizes and kKeyPlainSizes each map to an array of 146 // size_t values. The sum total of all size_t values of both arrays 147 // must equal the amount of data (i.e. MediaBuffer's range_length()). 148 // If both arrays are present, they must be of the same size. 149 // If only encrypted sizes are present it is assumed that all 150 // plain sizes are 0, i.e. all fragments are encrypted. 151 // To programmatically set these array, use the MetaData::setData API, i.e. 152 // const size_t encSizes[]; 153 // meta->setData( 154 // kKeyEncryptedSizes, 0 /* type */, encSizes, sizeof(encSizes)); 155 // A plain sizes array by itself makes no sense. 156 kKeyEncryptedSizes = 'encr', // size_t[] 157 kKeyPlainSizes = 'plai', // size_t[] 158 kKeyCryptoKey = 'cryK', // uint8_t[16] 159 kKeyCryptoIV = 'cryI', // uint8_t[16] 160 kKeyCryptoMode = 'cryM', // int32_t 161 162 kKeyCryptoDefaultIVSize = 'cryS', // int32_t 163 164 kKeyPssh = 'pssh', // raw data 165 }; 166 167 enum { 168 kTypeESDS = 'esds', 169 kTypeAVCC = 'avcc', 170 kTypeD263 = 'd263', 171 }; 172 173 class MetaData : public RefBase { 174 public: 175 MetaData(); 176 MetaData(const MetaData &from); 177 178 enum Type { 179 TYPE_NONE = 'none', 180 TYPE_C_STRING = 'cstr', 181 TYPE_INT32 = 'in32', 182 TYPE_INT64 = 'in64', 183 TYPE_FLOAT = 'floa', 184 TYPE_POINTER = 'ptr ', 185 TYPE_RECT = 'rect', 186 }; 187 188 void clear(); 189 bool remove(uint32_t key); 190 191 bool setCString(uint32_t key, const char *value); 192 bool setInt32(uint32_t key, int32_t value); 193 bool setInt64(uint32_t key, int64_t value); 194 bool setFloat(uint32_t key, float value); 195 bool setPointer(uint32_t key, void *value); 196 197 bool setRect( 198 uint32_t key, 199 int32_t left, int32_t top, 200 int32_t right, int32_t bottom); 201 202 bool findCString(uint32_t key, const char **value); 203 bool findInt32(uint32_t key, int32_t *value); 204 bool findInt64(uint32_t key, int64_t *value); 205 bool findFloat(uint32_t key, float *value); 206 bool findPointer(uint32_t key, void **value); 207 208 bool findRect( 209 uint32_t key, 210 int32_t *left, int32_t *top, 211 int32_t *right, int32_t *bottom); 212 213 bool setData(uint32_t key, uint32_t type, const void *data, size_t size); 214 215 bool findData(uint32_t key, uint32_t *type, 216 const void **data, size_t *size) const; 217 218 void dumpToLog() const; 219 220 protected: 221 virtual ~MetaData(); 222 223 private: 224 struct typed_data { 225 typed_data(); 226 ~typed_data(); 227 228 typed_data(const MetaData::typed_data &); 229 typed_data &operator=(const MetaData::typed_data &); 230 231 void clear(); 232 void setData(uint32_t type, const void *data, size_t size); 233 void getData(uint32_t *type, const void **data, size_t *size) const; 234 String8 asString() const; 235 236 private: 237 uint32_t mType; 238 size_t mSize; 239 240 union { 241 void *ext_data; 242 float reservoir; 243 } u; 244 usesReservoirtyped_data245 bool usesReservoir() const { 246 return mSize <= sizeof(u.reservoir); 247 } 248 249 void allocateStorage(size_t size); 250 void freeStorage(); 251 storagetyped_data252 void *storage() { 253 return usesReservoir() ? &u.reservoir : u.ext_data; 254 } 255 storagetyped_data256 const void *storage() const { 257 return usesReservoir() ? &u.reservoir : u.ext_data; 258 } 259 }; 260 261 struct Rect { 262 int32_t mLeft, mTop, mRight, mBottom; 263 }; 264 265 KeyedVector<uint32_t, typed_data> mItems; 266 267 // MetaData &operator=(const MetaData &); 268 }; 269 270 } // namespace android 271 272 #endif // META_DATA_H_ 273