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 kKeyHVCC = 'hvcc', // raw data 57 kKeyD263 = 'd263', // raw data 58 kKeyVorbisInfo = 'vinf', // raw data 59 kKeyVorbisBooks = 'vboo', // raw data 60 kKeyOpusHeader = 'ohdr', // raw data 61 kKeyOpusCodecDelay = 'ocod', // uint64_t (codec delay in ns) 62 kKeyOpusSeekPreRoll = 'ospr', // uint64_t (seek preroll in ns) 63 kKeyWantsNALFragments = 'NALf', 64 kKeyIsSyncFrame = 'sync', // int32_t (bool) 65 kKeyIsCodecConfig = 'conf', // int32_t (bool) 66 kKeyTime = 'time', // int64_t (usecs) 67 kKeyDecodingTime = 'decT', // int64_t (decoding timestamp in usecs) 68 kKeyNTPTime = 'ntpT', // uint64_t (ntp-timestamp) 69 kKeyTargetTime = 'tarT', // int64_t (usecs) 70 kKeyDriftTime = 'dftT', // int64_t (usecs) 71 kKeyAnchorTime = 'ancT', // int64_t (usecs) 72 kKeyDuration = 'dura', // int64_t (usecs) 73 kKeyColorFormat = 'colf', 74 kKeyPlatformPrivate = 'priv', // pointer 75 kKeyDecoderComponent = 'decC', // cstring 76 kKeyBufferID = 'bfID', 77 kKeyMaxInputSize = 'inpS', 78 kKeyThumbnailTime = 'thbT', // int64_t (usecs) 79 kKeyTrackID = 'trID', 80 kKeyIsDRM = 'idrm', // int32_t (bool) 81 kKeyEncoderDelay = 'encd', // int32_t (frames) 82 kKeyEncoderPadding = 'encp', // int32_t (frames) 83 84 kKeyAlbum = 'albu', // cstring 85 kKeyArtist = 'arti', // cstring 86 kKeyAlbumArtist = 'aart', // cstring 87 kKeyComposer = 'comp', // cstring 88 kKeyGenre = 'genr', // cstring 89 kKeyTitle = 'titl', // cstring 90 kKeyYear = 'year', // cstring 91 kKeyAlbumArt = 'albA', // compressed image data 92 kKeyAlbumArtMIME = 'alAM', // cstring 93 kKeyAuthor = 'auth', // cstring 94 kKeyCDTrackNumber = 'cdtr', // cstring 95 kKeyDiscNumber = 'dnum', // cstring 96 kKeyDate = 'date', // cstring 97 kKeyWriter = 'writ', // cstring 98 kKeyCompilation = 'cpil', // cstring 99 kKeyLocation = 'loc ', // cstring 100 kKeyTimeScale = 'tmsl', // int32_t 101 102 // video profile and level 103 kKeyVideoProfile = 'vprf', // int32_t 104 kKeyVideoLevel = 'vlev', // int32_t 105 106 // Set this key to enable authoring files in 64-bit offset 107 kKey64BitFileOffset = 'fobt', // int32_t (bool) 108 kKey2ByteNalLength = '2NAL', // int32_t (bool) 109 110 // Identify the file output format for authoring 111 // Please see <media/mediarecorder.h> for the supported 112 // file output formats. 113 kKeyFileType = 'ftyp', // int32_t 114 115 // Track authoring progress status 116 // kKeyTrackTimeStatus is used to track progress in elapsed time 117 kKeyTrackTimeStatus = 'tktm', // int64_t 118 119 kKeyRealTimeRecording = 'rtrc', // bool (int32_t) 120 kKeyNumBuffers = 'nbbf', // int32_t 121 122 // Ogg files can be tagged to be automatically looping... 123 kKeyAutoLoop = 'autL', // bool (int32_t) 124 125 kKeyValidSamples = 'valD', // int32_t 126 127 kKeyIsUnreadable = 'unre', // bool (int32_t) 128 129 // An indication that a video buffer has been rendered. 130 kKeyRendered = 'rend', // bool (int32_t) 131 132 // The language code for this media 133 kKeyMediaLanguage = 'lang', // cstring 134 135 // To store the timed text format data 136 kKeyTextFormatData = 'text', // raw data 137 138 kKeyRequiresSecureBuffers = 'secu', // bool (int32_t) 139 140 kKeyIsADTS = 'adts', // bool (int32_t) 141 kKeyAACAOT = 'aaot', // int32_t 142 143 // If a MediaBuffer's data represents (at least partially) encrypted 144 // data, the following fields aid in decryption. 145 // The data can be thought of as pairs of plain and encrypted data 146 // fragments, i.e. plain and encrypted data alternate. 147 // The first fragment is by convention plain data (if that's not the 148 // case, simply specify plain fragment size of 0). 149 // kKeyEncryptedSizes and kKeyPlainSizes each map to an array of 150 // size_t values. The sum total of all size_t values of both arrays 151 // must equal the amount of data (i.e. MediaBuffer's range_length()). 152 // If both arrays are present, they must be of the same size. 153 // If only encrypted sizes are present it is assumed that all 154 // plain sizes are 0, i.e. all fragments are encrypted. 155 // To programmatically set these array, use the MetaData::setData API, i.e. 156 // const size_t encSizes[]; 157 // meta->setData( 158 // kKeyEncryptedSizes, 0 /* type */, encSizes, sizeof(encSizes)); 159 // A plain sizes array by itself makes no sense. 160 kKeyEncryptedSizes = 'encr', // size_t[] 161 kKeyPlainSizes = 'plai', // size_t[] 162 kKeyCryptoKey = 'cryK', // uint8_t[16] 163 kKeyCryptoIV = 'cryI', // uint8_t[16] 164 kKeyCryptoMode = 'cryM', // int32_t 165 166 kKeyCryptoDefaultIVSize = 'cryS', // int32_t 167 168 kKeyPssh = 'pssh', // raw data 169 170 // Please see MediaFormat.KEY_IS_AUTOSELECT. 171 kKeyTrackIsAutoselect = 'auto', // bool (int32_t) 172 // Please see MediaFormat.KEY_IS_DEFAULT. 173 kKeyTrackIsDefault = 'dflt', // bool (int32_t) 174 // Similar to MediaFormat.KEY_IS_FORCED_SUBTITLE but pertains to av tracks as well. 175 kKeyTrackIsForced = 'frcd', // bool (int32_t) 176 }; 177 178 enum { 179 kTypeESDS = 'esds', 180 kTypeAVCC = 'avcc', 181 kTypeHVCC = 'hvcc', 182 kTypeD263 = 'd263', 183 }; 184 185 class MetaData : public RefBase { 186 public: 187 MetaData(); 188 MetaData(const MetaData &from); 189 190 enum Type { 191 TYPE_NONE = 'none', 192 TYPE_C_STRING = 'cstr', 193 TYPE_INT32 = 'in32', 194 TYPE_INT64 = 'in64', 195 TYPE_FLOAT = 'floa', 196 TYPE_POINTER = 'ptr ', 197 TYPE_RECT = 'rect', 198 }; 199 200 void clear(); 201 bool remove(uint32_t key); 202 203 bool setCString(uint32_t key, const char *value); 204 bool setInt32(uint32_t key, int32_t value); 205 bool setInt64(uint32_t key, int64_t value); 206 bool setFloat(uint32_t key, float value); 207 bool setPointer(uint32_t key, void *value); 208 209 bool setRect( 210 uint32_t key, 211 int32_t left, int32_t top, 212 int32_t right, int32_t bottom); 213 214 bool findCString(uint32_t key, const char **value); 215 bool findInt32(uint32_t key, int32_t *value); 216 bool findInt64(uint32_t key, int64_t *value); 217 bool findFloat(uint32_t key, float *value); 218 bool findPointer(uint32_t key, void **value); 219 220 bool findRect( 221 uint32_t key, 222 int32_t *left, int32_t *top, 223 int32_t *right, int32_t *bottom); 224 225 bool setData(uint32_t key, uint32_t type, const void *data, size_t size); 226 227 bool findData(uint32_t key, uint32_t *type, 228 const void **data, size_t *size) const; 229 230 bool hasData(uint32_t key) const; 231 232 void dumpToLog() const; 233 234 protected: 235 virtual ~MetaData(); 236 237 private: 238 struct typed_data { 239 typed_data(); 240 ~typed_data(); 241 242 typed_data(const MetaData::typed_data &); 243 typed_data &operator=(const MetaData::typed_data &); 244 245 void clear(); 246 void setData(uint32_t type, const void *data, size_t size); 247 void getData(uint32_t *type, const void **data, size_t *size) const; 248 String8 asString() const; 249 250 private: 251 uint32_t mType; 252 size_t mSize; 253 254 union { 255 void *ext_data; 256 float reservoir; 257 } u; 258 259 bool usesReservoir() const { 260 return mSize <= sizeof(u.reservoir); 261 } 262 263 void allocateStorage(size_t size); 264 void freeStorage(); 265 266 void *storage() { 267 return usesReservoir() ? &u.reservoir : u.ext_data; 268 } 269 270 const void *storage() const { 271 return usesReservoir() ? &u.reservoir : u.ext_data; 272 } 273 }; 274 275 struct Rect { 276 int32_t mLeft, mTop, mRight, mBottom; 277 }; 278 279 KeyedVector<uint32_t, typed_data> mItems; 280 281 // MetaData &operator=(const MetaData &); 282 }; 283 284 } // namespace android 285 286 #endif // META_DATA_H_ 287
