MetaData.h revision a0d0ba51ad60a68117a0ee78e37ab78715b8a069
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 29namespace android { 30 31// The following keys map to int32_t data unless indicated otherwise. 32enum { 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 kKeyMaxWidth = 'maxW', 79 kKeyMaxHeight = 'maxH', 80 kKeyThumbnailTime = 'thbT', // int64_t (usecs) 81 kKeyTrackID = 'trID', 82 kKeyIsDRM = 'idrm', // int32_t (bool) 83 kKeyEncoderDelay = 'encd', // int32_t (frames) 84 kKeyEncoderPadding = 'encp', // int32_t (frames) 85 86 kKeyAlbum = 'albu', // cstring 87 kKeyArtist = 'arti', // cstring 88 kKeyAlbumArtist = 'aart', // cstring 89 kKeyComposer = 'comp', // cstring 90 kKeyGenre = 'genr', // cstring 91 kKeyTitle = 'titl', // cstring 92 kKeyYear = 'year', // cstring 93 kKeyAlbumArt = 'albA', // compressed image data 94 kKeyAlbumArtMIME = 'alAM', // cstring 95 kKeyAuthor = 'auth', // cstring 96 kKeyCDTrackNumber = 'cdtr', // cstring 97 kKeyDiscNumber = 'dnum', // cstring 98 kKeyDate = 'date', // cstring 99 kKeyWriter = 'writ', // cstring 100 kKeyCompilation = 'cpil', // cstring 101 kKeyLocation = 'loc ', // cstring 102 kKeyTimeScale = 'tmsl', // int32_t 103 104 // video profile and level 105 kKeyVideoProfile = 'vprf', // int32_t 106 kKeyVideoLevel = 'vlev', // int32_t 107 108 // Set this key to enable authoring files in 64-bit offset 109 kKey64BitFileOffset = 'fobt', // int32_t (bool) 110 kKey2ByteNalLength = '2NAL', // int32_t (bool) 111 112 // Identify the file output format for authoring 113 // Please see <media/mediarecorder.h> for the supported 114 // file output formats. 115 kKeyFileType = 'ftyp', // int32_t 116 117 // Track authoring progress status 118 // kKeyTrackTimeStatus is used to track progress in elapsed time 119 kKeyTrackTimeStatus = 'tktm', // int64_t 120 121 kKeyRealTimeRecording = 'rtrc', // bool (int32_t) 122 kKeyNumBuffers = 'nbbf', // int32_t 123 124 // Ogg files can be tagged to be automatically looping... 125 kKeyAutoLoop = 'autL', // bool (int32_t) 126 127 kKeyValidSamples = 'valD', // int32_t 128 129 kKeyIsUnreadable = 'unre', // bool (int32_t) 130 131 // An indication that a video buffer has been rendered. 132 kKeyRendered = 'rend', // bool (int32_t) 133 134 // The language code for this media 135 kKeyMediaLanguage = 'lang', // cstring 136 137 // To store the timed text format data 138 kKeyTextFormatData = 'text', // raw data 139 140 kKeyRequiresSecureBuffers = 'secu', // bool (int32_t) 141 142 kKeyIsADTS = 'adts', // bool (int32_t) 143 kKeyAACAOT = 'aaot', // int32_t 144 145 // If a MediaBuffer's data represents (at least partially) encrypted 146 // data, the following fields aid in decryption. 147 // The data can be thought of as pairs of plain and encrypted data 148 // fragments, i.e. plain and encrypted data alternate. 149 // The first fragment is by convention plain data (if that's not the 150 // case, simply specify plain fragment size of 0). 151 // kKeyEncryptedSizes and kKeyPlainSizes each map to an array of 152 // size_t values. The sum total of all size_t values of both arrays 153 // must equal the amount of data (i.e. MediaBuffer's range_length()). 154 // If both arrays are present, they must be of the same size. 155 // If only encrypted sizes are present it is assumed that all 156 // plain sizes are 0, i.e. all fragments are encrypted. 157 // To programmatically set these array, use the MetaData::setData API, i.e. 158 // const size_t encSizes[]; 159 // meta->setData( 160 // kKeyEncryptedSizes, 0 /* type */, encSizes, sizeof(encSizes)); 161 // A plain sizes array by itself makes no sense. 162 kKeyEncryptedSizes = 'encr', // size_t[] 163 kKeyPlainSizes = 'plai', // size_t[] 164 kKeyCryptoKey = 'cryK', // uint8_t[16] 165 kKeyCryptoIV = 'cryI', // uint8_t[16] 166 kKeyCryptoMode = 'cryM', // int32_t 167 168 kKeyCryptoDefaultIVSize = 'cryS', // int32_t 169 170 kKeyPssh = 'pssh', // raw data 171 172 // Please see MediaFormat.KEY_IS_AUTOSELECT. 173 kKeyTrackIsAutoselect = 'auto', // bool (int32_t) 174 // Please see MediaFormat.KEY_IS_DEFAULT. 175 kKeyTrackIsDefault = 'dflt', // bool (int32_t) 176 // Similar to MediaFormat.KEY_IS_FORCED_SUBTITLE but pertains to av tracks as well. 177 kKeyTrackIsForced = 'frcd', // bool (int32_t) 178}; 179 180enum { 181 kTypeESDS = 'esds', 182 kTypeAVCC = 'avcc', 183 kTypeHVCC = 'hvcc', 184 kTypeD263 = 'd263', 185}; 186 187class MetaData : public RefBase { 188public: 189 MetaData(); 190 MetaData(const MetaData &from); 191 192 enum Type { 193 TYPE_NONE = 'none', 194 TYPE_C_STRING = 'cstr', 195 TYPE_INT32 = 'in32', 196 TYPE_INT64 = 'in64', 197 TYPE_FLOAT = 'floa', 198 TYPE_POINTER = 'ptr ', 199 TYPE_RECT = 'rect', 200 }; 201 202 void clear(); 203 bool remove(uint32_t key); 204 205 bool setCString(uint32_t key, const char *value); 206 bool setInt32(uint32_t key, int32_t value); 207 bool setInt64(uint32_t key, int64_t value); 208 bool setFloat(uint32_t key, float value); 209 bool setPointer(uint32_t key, void *value); 210 211 bool setRect( 212 uint32_t key, 213 int32_t left, int32_t top, 214 int32_t right, int32_t bottom); 215 216 bool findCString(uint32_t key, const char **value); 217 bool findInt32(uint32_t key, int32_t *value); 218 bool findInt64(uint32_t key, int64_t *value); 219 bool findFloat(uint32_t key, float *value); 220 bool findPointer(uint32_t key, void **value); 221 222 bool findRect( 223 uint32_t key, 224 int32_t *left, int32_t *top, 225 int32_t *right, int32_t *bottom); 226 227 bool setData(uint32_t key, uint32_t type, const void *data, size_t size); 228 229 bool findData(uint32_t key, uint32_t *type, 230 const void **data, size_t *size) const; 231 232 bool hasData(uint32_t key) const; 233 234 void dumpToLog() const; 235 236protected: 237 virtual ~MetaData(); 238 239private: 240 struct typed_data { 241 typed_data(); 242 ~typed_data(); 243 244 typed_data(const MetaData::typed_data &); 245 typed_data &operator=(const MetaData::typed_data &); 246 247 void clear(); 248 void setData(uint32_t type, const void *data, size_t size); 249 void getData(uint32_t *type, const void **data, size_t *size) const; 250 String8 asString() const; 251 252 private: 253 uint32_t mType; 254 size_t mSize; 255 256 union { 257 void *ext_data; 258 float reservoir; 259 } u; 260 261 bool usesReservoir() const { 262 return mSize <= sizeof(u.reservoir); 263 } 264 265 void allocateStorage(size_t size); 266 void freeStorage(); 267 268 void *storage() { 269 return usesReservoir() ? &u.reservoir : u.ext_data; 270 } 271 272 const void *storage() const { 273 return usesReservoir() ? &u.reservoir : u.ext_data; 274 } 275 }; 276 277 struct Rect { 278 int32_t mLeft, mTop, mRight, mBottom; 279 }; 280 281 KeyedVector<uint32_t, typed_data> mItems; 282 283 // MetaData &operator=(const MetaData &); 284}; 285 286} // namespace android 287 288#endif // META_DATA_H_ 289