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) 114 115 // Ogg files can be tagged to be automatically looping... 116 kKeyAutoLoop = 'autL', // bool (int32_t) 117 118 kKeyValidSamples = 'valD', // int32_t 119 120 kKeyIsUnreadable = 'unre', // bool (int32_t) 121 122 // An indication that a video buffer has been rendered. 123 kKeyRendered = 'rend', // bool (int32_t) 124 125 // The language code for this media 126 kKeyMediaLanguage = 'lang', // cstring 127 128 // To store the timed text format data 129 kKeyTextFormatData = 'text', // raw data 130 131 kKeyRequiresSecureBuffers = 'secu', // bool (int32_t) 132 133 kKeyIsADTS = 'adts', // bool (int32_t) 134 135 // If a MediaBuffer's data represents (at least partially) encrypted 136 // data, the following fields aid in decryption. 137 // The data can be thought of as pairs of plain and encrypted data 138 // fragments, i.e. plain and encrypted data alternate. 139 // The first fragment is by convention plain data (if that's not the 140 // case, simply specify plain fragment size of 0). 141 // kKeyEncryptedSizes and kKeyPlainSizes each map to an array of 142 // size_t values. The sum total of all size_t values of both arrays 143 // must equal the amount of data (i.e. MediaBuffer's range_length()). 144 // If both arrays are present, they must be of the same size. 145 // If only encrypted sizes are present it is assumed that all 146 // plain sizes are 0, i.e. all fragments are encrypted. 147 // To programmatically set these array, use the MetaData::setData API, i.e. 148 // const size_t encSizes[]; 149 // meta->setData( 150 // kKeyEncryptedSizes, 0 /* type */, encSizes, sizeof(encSizes)); 151 // A plain sizes array by itself makes no sense. 152 kKeyEncryptedSizes = 'encr', // size_t[] 153 kKeyPlainSizes = 'plai', // size_t[] 154 kKeyCryptoKey = 'cryK', // uint8_t[16] 155 kKeyCryptoIV = 'cryI', // uint8_t[16] 156 kKeyCryptoMode = 'cryM', // int32_t 157 }; 158 159 enum { 160 kTypeESDS = 'esds', 161 kTypeAVCC = 'avcc', 162 kTypeD263 = 'd263', 163 }; 164 165 class MetaData : public RefBase { 166 public: 167 MetaData(); 168 MetaData(const MetaData &from); 169 170 enum Type { 171 TYPE_NONE = 'none', 172 TYPE_C_STRING = 'cstr', 173 TYPE_INT32 = 'in32', 174 TYPE_INT64 = 'in64', 175 TYPE_FLOAT = 'floa', 176 TYPE_POINTER = 'ptr ', 177 TYPE_RECT = 'rect', 178 }; 179 180 void clear(); 181 bool remove(uint32_t key); 182 183 bool setCString(uint32_t key, const char *value); 184 bool setInt32(uint32_t key, int32_t value); 185 bool setInt64(uint32_t key, int64_t value); 186 bool setFloat(uint32_t key, float value); 187 bool setPointer(uint32_t key, void *value); 188 189 bool setRect( 190 uint32_t key, 191 int32_t left, int32_t top, 192 int32_t right, int32_t bottom); 193 194 bool findCString(uint32_t key, const char **value); 195 bool findInt32(uint32_t key, int32_t *value); 196 bool findInt64(uint32_t key, int64_t *value); 197 bool findFloat(uint32_t key, float *value); 198 bool findPointer(uint32_t key, void **value); 199 200 bool findRect( 201 uint32_t key, 202 int32_t *left, int32_t *top, 203 int32_t *right, int32_t *bottom); 204 205 bool setData(uint32_t key, uint32_t type, const void *data, size_t size); 206 207 bool findData(uint32_t key, uint32_t *type, 208 const void **data, size_t *size) const; 209 210 void dumpToLog() const; 211 212 protected: 213 virtual ~MetaData(); 214 215 private: 216 struct typed_data { 217 typed_data(); 218 ~typed_data(); 219 220 typed_data(const MetaData::typed_data &); 221 typed_data &operator=(const MetaData::typed_data &); 222 223 void clear(); 224 void setData(uint32_t type, const void *data, size_t size); 225 void getData(uint32_t *type, const void **data, size_t *size) const; 226 String8 asString() const; 227 228 private: 229 uint32_t mType; 230 size_t mSize; 231 232 union { 233 void *ext_data; 234 float reservoir; 235 } u; 236 237 bool usesReservoir() const { 238 return mSize <= sizeof(u.reservoir); 239 } 240 241 void allocateStorage(size_t size); 242 void freeStorage(); 243 244 void *storage() { 245 return usesReservoir() ? &u.reservoir : u.ext_data; 246 } 247 248 const void *storage() const { 249 return usesReservoir() ? &u.reservoir : u.ext_data; 250 } 251 }; 252 253 struct Rect { 254 int32_t mLeft, mTop, mRight, mBottom; 255 }; 256 257 KeyedVector<uint32_t, typed_data> mItems; 258 259 // MetaData &operator=(const MetaData &); 260 }; 261 262 } // namespace android 263 264 #endif // META_DATA_H_ 265
