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 39 // a rectangle, if absent assumed to be (0, 0, width - 1, height - 1) 40 kKeyCropRect = 'crop', 41 42 kKeyRotation = 'rotA', // int32_t (angle in degrees) 43 kKeyIFramesInterval = 'ifiv', // int32_t 44 kKeyStride = 'strd', // int32_t 45 kKeySliceHeight = 'slht', // int32_t 46 kKeyChannelCount = '#chn', // int32_t 47 kKeyChannelMask = 'chnm', // int32_t 48 kKeySampleRate = 'srte', // int32_t (audio sampling rate Hz) 49 kKeyFrameRate = 'frmR', // int32_t (video frame rate fps) 50 kKeyBitRate = 'brte', // int32_t (bps) 51 kKeyESDS = 'esds', // raw data 52 kKeyAACProfile = 'aacp', // int32_t 53 kKeyAVCC = 'avcc', // raw data 54 kKeyD263 = 'd263', // raw data 55 kKeyVorbisInfo = 'vinf', // raw data 56 kKeyVorbisBooks = 'vboo', // raw data 57 kKeyWantsNALFragments = 'NALf', 58 kKeyIsSyncFrame = 'sync', // int32_t (bool) 59 kKeyIsCodecConfig = 'conf', // int32_t (bool) 60 kKeyTime = 'time', // int64_t (usecs) 61 kKeyDecodingTime = 'decT', // int64_t (decoding timestamp in usecs) 62 kKeyNTPTime = 'ntpT', // uint64_t (ntp-timestamp) 63 kKeyTargetTime = 'tarT', // int64_t (usecs) 64 kKeyDriftTime = 'dftT', // int64_t (usecs) 65 kKeyAnchorTime = 'ancT', // int64_t (usecs) 66 kKeyDuration = 'dura', // int64_t (usecs) 67 kKeyColorFormat = 'colf', 68 kKeyPlatformPrivate = 'priv', // pointer 69 kKeyDecoderComponent = 'decC', // cstring 70 kKeyBufferID = 'bfID', 71 kKeyMaxInputSize = 'inpS', 72 kKeyThumbnailTime = 'thbT', // int64_t (usecs) 73 kKeyTrackID = 'trID', 74 kKeyIsDRM = 'idrm', // int32_t (bool) 75 kKeyEncoderDelay = 'encd', // int32_t (frames) 76 kKeyEncoderPadding = 'encp', // int32_t (frames) 77 78 kKeyAlbum = 'albu', // cstring 79 kKeyArtist = 'arti', // cstring 80 kKeyAlbumArtist = 'aart', // cstring 81 kKeyComposer = 'comp', // cstring 82 kKeyGenre = 'genr', // cstring 83 kKeyTitle = 'titl', // cstring 84 kKeyYear = 'year', // cstring 85 kKeyAlbumArt = 'albA', // compressed image data 86 kKeyAlbumArtMIME = 'alAM', // cstring 87 kKeyAuthor = 'auth', // cstring 88 kKeyCDTrackNumber = 'cdtr', // cstring 89 kKeyDiscNumber = 'dnum', // cstring 90 kKeyDate = 'date', // cstring 91 kKeyWriter = 'writ', // cstring 92 kKeyCompilation = 'cpil', // cstring 93 kKeyLocation = 'loc ', // cstring 94 kKeyTimeScale = 'tmsl', // int32_t 95 96 // video profile and level 97 kKeyVideoProfile = 'vprf', // int32_t 98 kKeyVideoLevel = 'vlev', // int32_t 99 100 // Set this key to enable authoring files in 64-bit offset 101 kKey64BitFileOffset = 'fobt', // int32_t (bool) 102 kKey2ByteNalLength = '2NAL', // int32_t (bool) 103 104 // Identify the file output format for authoring 105 // Please see <media/mediarecorder.h> for the supported 106 // file output formats. 107 kKeyFileType = 'ftyp', // int32_t 108 109 // Track authoring progress status 110 // kKeyTrackTimeStatus is used to track progress in elapsed time 111 kKeyTrackTimeStatus = 'tktm', // int64_t 112 113 kKeyNotRealTime = 'ntrt', // bool (int32_t) 114 kKeyNumBuffers = 'nbbf', // int32_t 115 116 // Ogg files can be tagged to be automatically looping... 117 kKeyAutoLoop = 'autL', // bool (int32_t) 118 119 kKeyValidSamples = 'valD', // int32_t 120 121 kKeyIsUnreadable = 'unre', // bool (int32_t) 122 123 // An indication that a video buffer has been rendered. 124 kKeyRendered = 'rend', // bool (int32_t) 125 126 // The language code for this media 127 kKeyMediaLanguage = 'lang', // cstring 128 129 // To store the timed text format data 130 kKeyTextFormatData = 'text', // raw data 131 132 kKeyRequiresSecureBuffers = 'secu', // bool (int32_t) 133 134 kKeyIsADTS = 'adts', // bool (int32_t) 135 136 // If a MediaBuffer's data represents (at least partially) encrypted 137 // data, the following fields aid in decryption. 138 // The data can be thought of as pairs of plain and encrypted data 139 // fragments, i.e. plain and encrypted data alternate. 140 // The first fragment is by convention plain data (if that's not the 141 // case, simply specify plain fragment size of 0). 142 // kKeyEncryptedSizes and kKeyPlainSizes each map to an array of 143 // size_t values. The sum total of all size_t values of both arrays 144 // must equal the amount of data (i.e. MediaBuffer's range_length()). 145 // If both arrays are present, they must be of the same size. 146 // If only encrypted sizes are present it is assumed that all 147 // plain sizes are 0, i.e. all fragments are encrypted. 148 // To programmatically set these array, use the MetaData::setData API, i.e. 149 // const size_t encSizes[]; 150 // meta->setData( 151 // kKeyEncryptedSizes, 0 /* type */, encSizes, sizeof(encSizes)); 152 // A plain sizes array by itself makes no sense. 153 kKeyEncryptedSizes = 'encr', // size_t[] 154 kKeyPlainSizes = 'plai', // size_t[] 155 kKeyCryptoKey = 'cryK', // uint8_t[16] 156 kKeyCryptoIV = 'cryI', // uint8_t[16] 157 kKeyCryptoMode = 'cryM', // int32_t 158 }; 159 160 enum { 161 kTypeESDS = 'esds', 162 kTypeAVCC = 'avcc', 163 kTypeD263 = 'd263', 164 }; 165 166 class MetaData : public RefBase { 167 public: 168 MetaData(); 169 MetaData(const MetaData &from); 170 171 enum Type { 172 TYPE_NONE = 'none', 173 TYPE_C_STRING = 'cstr', 174 TYPE_INT32 = 'in32', 175 TYPE_INT64 = 'in64', 176 TYPE_FLOAT = 'floa', 177 TYPE_POINTER = 'ptr ', 178 TYPE_RECT = 'rect', 179 }; 180 181 void clear(); 182 bool remove(uint32_t key); 183 184 bool setCString(uint32_t key, const char *value); 185 bool setInt32(uint32_t key, int32_t value); 186 bool setInt64(uint32_t key, int64_t value); 187 bool setFloat(uint32_t key, float value); 188 bool setPointer(uint32_t key, void *value); 189 190 bool setRect( 191 uint32_t key, 192 int32_t left, int32_t top, 193 int32_t right, int32_t bottom); 194 195 bool findCString(uint32_t key, const char **value); 196 bool findInt32(uint32_t key, int32_t *value); 197 bool findInt64(uint32_t key, int64_t *value); 198 bool findFloat(uint32_t key, float *value); 199 bool findPointer(uint32_t key, void **value); 200 201 bool findRect( 202 uint32_t key, 203 int32_t *left, int32_t *top, 204 int32_t *right, int32_t *bottom); 205 206 bool setData(uint32_t key, uint32_t type, const void *data, size_t size); 207 208 bool findData(uint32_t key, uint32_t *type, 209 const void **data, size_t *size) const; 210 211 void dumpToLog() const; 212 213 protected: 214 virtual ~MetaData(); 215 216 private: 217 struct typed_data { 218 typed_data(); 219 ~typed_data(); 220 221 typed_data(const MetaData::typed_data &); 222 typed_data &operator=(const MetaData::typed_data &); 223 224 void clear(); 225 void setData(uint32_t type, const void *data, size_t size); 226 void getData(uint32_t *type, const void **data, size_t *size) const; 227 String8 asString() const; 228 229 private: 230 uint32_t mType; 231 size_t mSize; 232 233 union { 234 void *ext_data; 235 float reservoir; 236 } u; 237 238 bool usesReservoir() const { 239 return mSize <= sizeof(u.reservoir); 240 } 241 242 void allocateStorage(size_t size); 243 void freeStorage(); 244 245 void *storage() { 246 return usesReservoir() ? &u.reservoir : u.ext_data; 247 } 248 249 const void *storage() const { 250 return usesReservoir() ? &u.reservoir : u.ext_data; 251 } 252 }; 253 254 struct Rect { 255 int32_t mLeft, mTop, mRight, mBottom; 256 }; 257 258 KeyedVector<uint32_t, typed_data> mItems; 259 260 // MetaData &operator=(const MetaData &); 261 }; 262 263 } // namespace android 264 265 #endif // META_DATA_H_ 266
