Andreas Huber | 072f524 | 2010-05-20 14:56:53 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2010 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 | //#define LOG_NDEBUG 0 |
| 18 | #define LOG_TAG "MatroskaExtractor" |
| 19 | #include <utils/Log.h> |
| 20 | |
| 21 | #include "MatroskaExtractor.h" |
| 22 | |
| 23 | #include "mkvparser.hpp" |
| 24 | |
Andreas Huber | 0f62458 | 2010-11-15 15:10:34 -0800 | [diff] [blame] | 25 | #include <media/stagefright/foundation/ADebug.h> |
| 26 | #include <media/stagefright/foundation/hexdump.h> |
Andreas Huber | 072f524 | 2010-05-20 14:56:53 -0700 | [diff] [blame] | 27 | #include <media/stagefright/DataSource.h> |
| 28 | #include <media/stagefright/MediaBuffer.h> |
Andreas Huber | 072f524 | 2010-05-20 14:56:53 -0700 | [diff] [blame] | 29 | #include <media/stagefright/MediaDefs.h> |
| 30 | #include <media/stagefright/MediaErrors.h> |
| 31 | #include <media/stagefright/MediaSource.h> |
| 32 | #include <media/stagefright/MetaData.h> |
Andreas Huber | 0f62458 | 2010-11-15 15:10:34 -0800 | [diff] [blame] | 33 | #include <media/stagefright/Utils.h> |
Andreas Huber | 072f524 | 2010-05-20 14:56:53 -0700 | [diff] [blame] | 34 | #include <utils/String8.h> |
| 35 | |
| 36 | namespace android { |
| 37 | |
| 38 | struct DataSourceReader : public mkvparser::IMkvReader { |
| 39 | DataSourceReader(const sp<DataSource> &source) |
| 40 | : mSource(source) { |
| 41 | } |
| 42 | |
| 43 | virtual int Read(long long position, long length, unsigned char* buffer) { |
| 44 | CHECK(position >= 0); |
| 45 | CHECK(length >= 0); |
| 46 | |
| 47 | if (length == 0) { |
| 48 | return 0; |
| 49 | } |
| 50 | |
| 51 | ssize_t n = mSource->readAt(position, buffer, length); |
| 52 | |
| 53 | if (n <= 0) { |
| 54 | return -1; |
| 55 | } |
| 56 | |
| 57 | return 0; |
| 58 | } |
| 59 | |
| 60 | virtual int Length(long long* total, long long* available) { |
James Dong | b1262a8 | 2010-11-16 14:04:54 -0800 | [diff] [blame] | 61 | off64_t size; |
Andreas Huber | 072f524 | 2010-05-20 14:56:53 -0700 | [diff] [blame] | 62 | if (mSource->getSize(&size) != OK) { |
Andreas Huber | 8885e67 | 2011-03-18 14:38:56 -0700 | [diff] [blame] | 63 | *total = -1; |
| 64 | *available = (long long)((1ull << 63) - 1); |
| 65 | |
| 66 | return 0; |
Andreas Huber | 072f524 | 2010-05-20 14:56:53 -0700 | [diff] [blame] | 67 | } |
| 68 | |
| 69 | if (total) { |
| 70 | *total = size; |
| 71 | } |
| 72 | |
| 73 | if (available) { |
| 74 | *available = size; |
| 75 | } |
| 76 | |
| 77 | return 0; |
| 78 | } |
| 79 | |
| 80 | private: |
| 81 | sp<DataSource> mSource; |
| 82 | |
| 83 | DataSourceReader(const DataSourceReader &); |
| 84 | DataSourceReader &operator=(const DataSourceReader &); |
| 85 | }; |
| 86 | |
| 87 | //////////////////////////////////////////////////////////////////////////////// |
| 88 | |
Andreas Huber | 6bdf2ed | 2010-05-25 13:35:02 -0700 | [diff] [blame] | 89 | struct BlockIterator { |
Andreas Huber | 8885e67 | 2011-03-18 14:38:56 -0700 | [diff] [blame] | 90 | BlockIterator(MatroskaExtractor *extractor, unsigned long trackNum); |
Andreas Huber | 6bdf2ed | 2010-05-25 13:35:02 -0700 | [diff] [blame] | 91 | |
| 92 | bool eos() const; |
| 93 | |
| 94 | void advance(); |
| 95 | void reset(); |
Andreas Huber | 089d3e3 | 2011-09-07 11:05:43 -0700 | [diff] [blame] | 96 | void seek(int64_t seekTimeUs, bool seekToKeyFrame); |
Andreas Huber | 6bdf2ed | 2010-05-25 13:35:02 -0700 | [diff] [blame] | 97 | |
| 98 | const mkvparser::Block *block() const; |
| 99 | int64_t blockTimeUs() const; |
| 100 | |
| 101 | private: |
Andreas Huber | 8885e67 | 2011-03-18 14:38:56 -0700 | [diff] [blame] | 102 | MatroskaExtractor *mExtractor; |
Andreas Huber | 6bdf2ed | 2010-05-25 13:35:02 -0700 | [diff] [blame] | 103 | unsigned long mTrackNum; |
| 104 | |
Andreas Huber | 8885e67 | 2011-03-18 14:38:56 -0700 | [diff] [blame] | 105 | const mkvparser::Cluster *mCluster; |
Andreas Huber | 6bdf2ed | 2010-05-25 13:35:02 -0700 | [diff] [blame] | 106 | const mkvparser::BlockEntry *mBlockEntry; |
Andreas Huber | 8885e67 | 2011-03-18 14:38:56 -0700 | [diff] [blame] | 107 | long mBlockEntryIndex; |
| 108 | |
| 109 | void advance_l(); |
Andreas Huber | 6bdf2ed | 2010-05-25 13:35:02 -0700 | [diff] [blame] | 110 | |
| 111 | BlockIterator(const BlockIterator &); |
| 112 | BlockIterator &operator=(const BlockIterator &); |
| 113 | }; |
| 114 | |
Andreas Huber | 072f524 | 2010-05-20 14:56:53 -0700 | [diff] [blame] | 115 | struct MatroskaSource : public MediaSource { |
| 116 | MatroskaSource( |
| 117 | const sp<MatroskaExtractor> &extractor, size_t index); |
| 118 | |
| 119 | virtual status_t start(MetaData *params); |
| 120 | virtual status_t stop(); |
| 121 | |
| 122 | virtual sp<MetaData> getFormat(); |
| 123 | |
| 124 | virtual status_t read( |
| 125 | MediaBuffer **buffer, const ReadOptions *options); |
| 126 | |
Andreas Huber | 6fe6b4c | 2011-01-11 11:56:06 -0800 | [diff] [blame] | 127 | protected: |
| 128 | virtual ~MatroskaSource(); |
| 129 | |
Andreas Huber | 072f524 | 2010-05-20 14:56:53 -0700 | [diff] [blame] | 130 | private: |
| 131 | enum Type { |
| 132 | AVC, |
| 133 | AAC, |
| 134 | OTHER |
| 135 | }; |
| 136 | |
| 137 | sp<MatroskaExtractor> mExtractor; |
| 138 | size_t mTrackIndex; |
Andreas Huber | 072f524 | 2010-05-20 14:56:53 -0700 | [diff] [blame] | 139 | Type mType; |
Andreas Huber | 089d3e3 | 2011-09-07 11:05:43 -0700 | [diff] [blame] | 140 | bool mIsAudio; |
Andreas Huber | 6bdf2ed | 2010-05-25 13:35:02 -0700 | [diff] [blame] | 141 | BlockIterator mBlockIter; |
Andreas Huber | 0f62458 | 2010-11-15 15:10:34 -0800 | [diff] [blame] | 142 | size_t mNALSizeLen; // for type AVC |
Andreas Huber | 072f524 | 2010-05-20 14:56:53 -0700 | [diff] [blame] | 143 | |
Andreas Huber | 6fe6b4c | 2011-01-11 11:56:06 -0800 | [diff] [blame] | 144 | List<MediaBuffer *> mPendingFrames; |
| 145 | |
Andreas Huber | 072f524 | 2010-05-20 14:56:53 -0700 | [diff] [blame] | 146 | status_t advance(); |
| 147 | |
Andreas Huber | 6fe6b4c | 2011-01-11 11:56:06 -0800 | [diff] [blame] | 148 | status_t readBlock(); |
| 149 | void clearPendingFrames(); |
| 150 | |
Andreas Huber | 072f524 | 2010-05-20 14:56:53 -0700 | [diff] [blame] | 151 | MatroskaSource(const MatroskaSource &); |
| 152 | MatroskaSource &operator=(const MatroskaSource &); |
| 153 | }; |
| 154 | |
| 155 | MatroskaSource::MatroskaSource( |
| 156 | const sp<MatroskaExtractor> &extractor, size_t index) |
| 157 | : mExtractor(extractor), |
| 158 | mTrackIndex(index), |
| 159 | mType(OTHER), |
Andreas Huber | 089d3e3 | 2011-09-07 11:05:43 -0700 | [diff] [blame] | 160 | mIsAudio(false), |
Andreas Huber | 8885e67 | 2011-03-18 14:38:56 -0700 | [diff] [blame] | 161 | mBlockIter(mExtractor.get(), |
Andreas Huber | 0f62458 | 2010-11-15 15:10:34 -0800 | [diff] [blame] | 162 | mExtractor->mTracks.itemAt(index).mTrackNum), |
| 163 | mNALSizeLen(0) { |
| 164 | sp<MetaData> meta = mExtractor->mTracks.itemAt(index).mMeta; |
| 165 | |
Andreas Huber | 072f524 | 2010-05-20 14:56:53 -0700 | [diff] [blame] | 166 | const char *mime; |
Andreas Huber | 0f62458 | 2010-11-15 15:10:34 -0800 | [diff] [blame] | 167 | CHECK(meta->findCString(kKeyMIMEType, &mime)); |
Andreas Huber | 072f524 | 2010-05-20 14:56:53 -0700 | [diff] [blame] | 168 | |
Andreas Huber | 089d3e3 | 2011-09-07 11:05:43 -0700 | [diff] [blame] | 169 | mIsAudio = !strncasecmp("audio/", mime, 6); |
| 170 | |
Andreas Huber | 072f524 | 2010-05-20 14:56:53 -0700 | [diff] [blame] | 171 | if (!strcasecmp(mime, MEDIA_MIMETYPE_VIDEO_AVC)) { |
| 172 | mType = AVC; |
Andreas Huber | 0f62458 | 2010-11-15 15:10:34 -0800 | [diff] [blame] | 173 | |
| 174 | uint32_t dummy; |
| 175 | const uint8_t *avcc; |
| 176 | size_t avccSize; |
| 177 | CHECK(meta->findData( |
| 178 | kKeyAVCC, &dummy, (const void **)&avcc, &avccSize)); |
| 179 | |
| 180 | CHECK_GE(avccSize, 5u); |
| 181 | |
| 182 | mNALSizeLen = 1 + (avcc[4] & 3); |
Steve Block | 71f2cf1 | 2011-10-20 11:56:00 +0100 | [diff] [blame] | 183 | ALOGV("mNALSizeLen = %d", mNALSizeLen); |
Andreas Huber | 072f524 | 2010-05-20 14:56:53 -0700 | [diff] [blame] | 184 | } else if (!strcasecmp(mime, MEDIA_MIMETYPE_AUDIO_AAC)) { |
| 185 | mType = AAC; |
| 186 | } |
| 187 | } |
| 188 | |
Andreas Huber | 6fe6b4c | 2011-01-11 11:56:06 -0800 | [diff] [blame] | 189 | MatroskaSource::~MatroskaSource() { |
| 190 | clearPendingFrames(); |
| 191 | } |
| 192 | |
Andreas Huber | 072f524 | 2010-05-20 14:56:53 -0700 | [diff] [blame] | 193 | status_t MatroskaSource::start(MetaData *params) { |
Andreas Huber | 6bdf2ed | 2010-05-25 13:35:02 -0700 | [diff] [blame] | 194 | mBlockIter.reset(); |
Andreas Huber | 072f524 | 2010-05-20 14:56:53 -0700 | [diff] [blame] | 195 | |
| 196 | return OK; |
| 197 | } |
| 198 | |
| 199 | status_t MatroskaSource::stop() { |
Andreas Huber | 6fe6b4c | 2011-01-11 11:56:06 -0800 | [diff] [blame] | 200 | clearPendingFrames(); |
| 201 | |
Andreas Huber | 072f524 | 2010-05-20 14:56:53 -0700 | [diff] [blame] | 202 | return OK; |
| 203 | } |
| 204 | |
| 205 | sp<MetaData> MatroskaSource::getFormat() { |
| 206 | return mExtractor->mTracks.itemAt(mTrackIndex).mMeta; |
| 207 | } |
| 208 | |
Andreas Huber | 6bdf2ed | 2010-05-25 13:35:02 -0700 | [diff] [blame] | 209 | //////////////////////////////////////////////////////////////////////////////// |
| 210 | |
| 211 | BlockIterator::BlockIterator( |
Andreas Huber | 8885e67 | 2011-03-18 14:38:56 -0700 | [diff] [blame] | 212 | MatroskaExtractor *extractor, unsigned long trackNum) |
| 213 | : mExtractor(extractor), |
Andreas Huber | 6bdf2ed | 2010-05-25 13:35:02 -0700 | [diff] [blame] | 214 | mTrackNum(trackNum), |
| 215 | mCluster(NULL), |
Andreas Huber | 8885e67 | 2011-03-18 14:38:56 -0700 | [diff] [blame] | 216 | mBlockEntry(NULL), |
| 217 | mBlockEntryIndex(0) { |
Andreas Huber | 6bdf2ed | 2010-05-25 13:35:02 -0700 | [diff] [blame] | 218 | reset(); |
| 219 | } |
| 220 | |
| 221 | bool BlockIterator::eos() const { |
| 222 | return mCluster == NULL || mCluster->EOS(); |
| 223 | } |
| 224 | |
| 225 | void BlockIterator::advance() { |
Andreas Huber | 8885e67 | 2011-03-18 14:38:56 -0700 | [diff] [blame] | 226 | Mutex::Autolock autoLock(mExtractor->mLock); |
| 227 | advance_l(); |
| 228 | } |
Andreas Huber | 6bdf2ed | 2010-05-25 13:35:02 -0700 | [diff] [blame] | 229 | |
Andreas Huber | 8885e67 | 2011-03-18 14:38:56 -0700 | [diff] [blame] | 230 | void BlockIterator::advance_l() { |
| 231 | for (;;) { |
| 232 | long res = mCluster->GetEntry(mBlockEntryIndex, mBlockEntry); |
Steve Block | 71f2cf1 | 2011-10-20 11:56:00 +0100 | [diff] [blame] | 233 | ALOGV("GetEntry returned %ld", res); |
Andreas Huber | 8885e67 | 2011-03-18 14:38:56 -0700 | [diff] [blame] | 234 | |
| 235 | long long pos; |
| 236 | long len; |
| 237 | if (res < 0) { |
| 238 | // Need to parse this cluster some more |
| 239 | |
| 240 | CHECK_EQ(res, mkvparser::E_BUFFER_NOT_FULL); |
| 241 | |
| 242 | res = mCluster->Parse(pos, len); |
Steve Block | 71f2cf1 | 2011-10-20 11:56:00 +0100 | [diff] [blame] | 243 | ALOGV("Parse returned %ld", res); |
Andreas Huber | 8885e67 | 2011-03-18 14:38:56 -0700 | [diff] [blame] | 244 | |
| 245 | if (res < 0) { |
| 246 | // I/O error |
| 247 | |
| 248 | LOGE("Cluster::Parse returned result %ld", res); |
| 249 | |
| 250 | mCluster = NULL; |
Andreas Huber | 6bdf2ed | 2010-05-25 13:35:02 -0700 | [diff] [blame] | 251 | break; |
Andreas Huber | 072f524 | 2010-05-20 14:56:53 -0700 | [diff] [blame] | 252 | } |
Andreas Huber | 6bdf2ed | 2010-05-25 13:35:02 -0700 | [diff] [blame] | 253 | |
Andreas Huber | 8885e67 | 2011-03-18 14:38:56 -0700 | [diff] [blame] | 254 | continue; |
| 255 | } else if (res == 0) { |
| 256 | // We're done with this cluster |
| 257 | |
| 258 | const mkvparser::Cluster *nextCluster; |
| 259 | res = mExtractor->mSegment->ParseNext( |
| 260 | mCluster, nextCluster, pos, len); |
Steve Block | 71f2cf1 | 2011-10-20 11:56:00 +0100 | [diff] [blame] | 261 | ALOGV("ParseNext returned %ld", res); |
Andreas Huber | 8885e67 | 2011-03-18 14:38:56 -0700 | [diff] [blame] | 262 | |
| 263 | if (res > 0) { |
| 264 | // EOF |
| 265 | |
| 266 | mCluster = NULL; |
| 267 | break; |
| 268 | } |
| 269 | |
| 270 | CHECK_EQ(res, 0); |
| 271 | CHECK(nextCluster != NULL); |
| 272 | CHECK(!nextCluster->EOS()); |
| 273 | |
| 274 | mCluster = nextCluster; |
| 275 | |
| 276 | res = mCluster->Parse(pos, len); |
Steve Block | 71f2cf1 | 2011-10-20 11:56:00 +0100 | [diff] [blame] | 277 | ALOGV("Parse (2) returned %ld", res); |
Andreas Huber | 8885e67 | 2011-03-18 14:38:56 -0700 | [diff] [blame] | 278 | CHECK_GE(res, 0); |
| 279 | |
| 280 | mBlockEntryIndex = 0; |
| 281 | continue; |
Andreas Huber | 072f524 | 2010-05-20 14:56:53 -0700 | [diff] [blame] | 282 | } |
| 283 | |
Andreas Huber | 8885e67 | 2011-03-18 14:38:56 -0700 | [diff] [blame] | 284 | CHECK(mBlockEntry != NULL); |
| 285 | CHECK(mBlockEntry->GetBlock() != NULL); |
| 286 | ++mBlockEntryIndex; |
| 287 | |
| 288 | if (mBlockEntry->GetBlock()->GetTrackNumber() == mTrackNum) { |
Andreas Huber | 6bdf2ed | 2010-05-25 13:35:02 -0700 | [diff] [blame] | 289 | break; |
Andreas Huber | 072f524 | 2010-05-20 14:56:53 -0700 | [diff] [blame] | 290 | } |
Andreas Huber | 6bdf2ed | 2010-05-25 13:35:02 -0700 | [diff] [blame] | 291 | } |
| 292 | } |
Andreas Huber | 072f524 | 2010-05-20 14:56:53 -0700 | [diff] [blame] | 293 | |
Andreas Huber | 6bdf2ed | 2010-05-25 13:35:02 -0700 | [diff] [blame] | 294 | void BlockIterator::reset() { |
Andreas Huber | 8885e67 | 2011-03-18 14:38:56 -0700 | [diff] [blame] | 295 | Mutex::Autolock autoLock(mExtractor->mLock); |
Andreas Huber | 6bdf2ed | 2010-05-25 13:35:02 -0700 | [diff] [blame] | 296 | |
Andreas Huber | 8885e67 | 2011-03-18 14:38:56 -0700 | [diff] [blame] | 297 | mCluster = mExtractor->mSegment->GetFirst(); |
Andreas Huber | 2179692 | 2011-04-01 13:36:53 -0700 | [diff] [blame] | 298 | mBlockEntry = NULL; |
Andreas Huber | 8885e67 | 2011-03-18 14:38:56 -0700 | [diff] [blame] | 299 | mBlockEntryIndex = 0; |
| 300 | |
| 301 | do { |
| 302 | advance_l(); |
| 303 | } while (!eos() && block()->GetTrackNumber() != mTrackNum); |
Andreas Huber | 6bdf2ed | 2010-05-25 13:35:02 -0700 | [diff] [blame] | 304 | } |
| 305 | |
Andreas Huber | 089d3e3 | 2011-09-07 11:05:43 -0700 | [diff] [blame] | 306 | void BlockIterator::seek(int64_t seekTimeUs, bool seekToKeyFrame) { |
Andreas Huber | 8885e67 | 2011-03-18 14:38:56 -0700 | [diff] [blame] | 307 | Mutex::Autolock autoLock(mExtractor->mLock); |
| 308 | |
| 309 | mCluster = mExtractor->mSegment->FindCluster(seekTimeUs * 1000ll); |
Andreas Huber | 2179692 | 2011-04-01 13:36:53 -0700 | [diff] [blame] | 310 | mBlockEntry = NULL; |
Andreas Huber | 8885e67 | 2011-03-18 14:38:56 -0700 | [diff] [blame] | 311 | mBlockEntryIndex = 0; |
Andreas Huber | 6bdf2ed | 2010-05-25 13:35:02 -0700 | [diff] [blame] | 312 | |
Andreas Huber | 2179692 | 2011-04-01 13:36:53 -0700 | [diff] [blame] | 313 | do { |
Andreas Huber | 8885e67 | 2011-03-18 14:38:56 -0700 | [diff] [blame] | 314 | advance_l(); |
Andreas Huber | 072f524 | 2010-05-20 14:56:53 -0700 | [diff] [blame] | 315 | } |
Andreas Huber | 2179692 | 2011-04-01 13:36:53 -0700 | [diff] [blame] | 316 | while (!eos() && block()->GetTrackNumber() != mTrackNum); |
Andreas Huber | 072f524 | 2010-05-20 14:56:53 -0700 | [diff] [blame] | 317 | |
Andreas Huber | 089d3e3 | 2011-09-07 11:05:43 -0700 | [diff] [blame] | 318 | if (seekToKeyFrame) { |
| 319 | while (!eos() && !mBlockEntry->GetBlock()->IsKey()) { |
| 320 | advance_l(); |
| 321 | } |
Andreas Huber | 6bdf2ed | 2010-05-25 13:35:02 -0700 | [diff] [blame] | 322 | } |
Andreas Huber | 072f524 | 2010-05-20 14:56:53 -0700 | [diff] [blame] | 323 | } |
| 324 | |
Andreas Huber | 6bdf2ed | 2010-05-25 13:35:02 -0700 | [diff] [blame] | 325 | const mkvparser::Block *BlockIterator::block() const { |
| 326 | CHECK(!eos()); |
| 327 | |
| 328 | return mBlockEntry->GetBlock(); |
| 329 | } |
| 330 | |
| 331 | int64_t BlockIterator::blockTimeUs() const { |
| 332 | return (mBlockEntry->GetBlock()->GetTime(mCluster) + 500ll) / 1000ll; |
| 333 | } |
| 334 | |
| 335 | //////////////////////////////////////////////////////////////////////////////// |
| 336 | |
Andreas Huber | 0f62458 | 2010-11-15 15:10:34 -0800 | [diff] [blame] | 337 | static unsigned U24_AT(const uint8_t *ptr) { |
| 338 | return ptr[0] << 16 | ptr[1] << 8 | ptr[2]; |
| 339 | } |
| 340 | |
Andreas Huber | 6fe6b4c | 2011-01-11 11:56:06 -0800 | [diff] [blame] | 341 | static size_t clz(uint8_t x) { |
| 342 | size_t numLeadingZeroes = 0; |
| 343 | |
| 344 | while (!(x & 0x80)) { |
| 345 | ++numLeadingZeroes; |
| 346 | x = x << 1; |
| 347 | } |
| 348 | |
| 349 | return numLeadingZeroes; |
| 350 | } |
| 351 | |
| 352 | void MatroskaSource::clearPendingFrames() { |
| 353 | while (!mPendingFrames.empty()) { |
| 354 | MediaBuffer *frame = *mPendingFrames.begin(); |
| 355 | mPendingFrames.erase(mPendingFrames.begin()); |
| 356 | |
| 357 | frame->release(); |
| 358 | frame = NULL; |
| 359 | } |
| 360 | } |
| 361 | |
Andreas Huber | 6fe6b4c | 2011-01-11 11:56:06 -0800 | [diff] [blame] | 362 | status_t MatroskaSource::readBlock() { |
| 363 | CHECK(mPendingFrames.empty()); |
| 364 | |
| 365 | if (mBlockIter.eos()) { |
| 366 | return ERROR_END_OF_STREAM; |
| 367 | } |
| 368 | |
| 369 | const mkvparser::Block *block = mBlockIter.block(); |
| 370 | |
Andreas Huber | 6fe6b4c | 2011-01-11 11:56:06 -0800 | [diff] [blame] | 371 | int64_t timeUs = mBlockIter.blockTimeUs(); |
Andreas Huber | 6fe6b4c | 2011-01-11 11:56:06 -0800 | [diff] [blame] | 372 | |
Andreas Huber | 8885e67 | 2011-03-18 14:38:56 -0700 | [diff] [blame] | 373 | for (int i = 0; i < block->GetFrameCount(); ++i) { |
| 374 | const mkvparser::Block::Frame &frame = block->GetFrame(i); |
Andreas Huber | 6fe6b4c | 2011-01-11 11:56:06 -0800 | [diff] [blame] | 375 | |
Andreas Huber | 8885e67 | 2011-03-18 14:38:56 -0700 | [diff] [blame] | 376 | MediaBuffer *mbuf = new MediaBuffer(frame.len); |
| 377 | mbuf->meta_data()->setInt64(kKeyTime, timeUs); |
| 378 | mbuf->meta_data()->setInt32(kKeyIsSyncFrame, block->IsKey()); |
Andreas Huber | 6fe6b4c | 2011-01-11 11:56:06 -0800 | [diff] [blame] | 379 | |
Andreas Huber | 8885e67 | 2011-03-18 14:38:56 -0700 | [diff] [blame] | 380 | long n = frame.Read(mExtractor->mReader, (unsigned char *)mbuf->data()); |
| 381 | if (n != 0) { |
| 382 | mPendingFrames.clear(); |
Andreas Huber | 6fe6b4c | 2011-01-11 11:56:06 -0800 | [diff] [blame] | 383 | |
Andreas Huber | 8885e67 | 2011-03-18 14:38:56 -0700 | [diff] [blame] | 384 | mBlockIter.advance(); |
| 385 | return ERROR_IO; |
| 386 | } |
| 387 | |
| 388 | mPendingFrames.push_back(mbuf); |
Andreas Huber | 6fe6b4c | 2011-01-11 11:56:06 -0800 | [diff] [blame] | 389 | } |
| 390 | |
| 391 | mBlockIter.advance(); |
| 392 | |
Andreas Huber | 6fe6b4c | 2011-01-11 11:56:06 -0800 | [diff] [blame] | 393 | return OK; |
| 394 | } |
| 395 | |
Andreas Huber | 072f524 | 2010-05-20 14:56:53 -0700 | [diff] [blame] | 396 | status_t MatroskaSource::read( |
| 397 | MediaBuffer **out, const ReadOptions *options) { |
| 398 | *out = NULL; |
| 399 | |
| 400 | int64_t seekTimeUs; |
Andreas Huber | 6624c9f | 2010-07-20 15:04:28 -0700 | [diff] [blame] | 401 | ReadOptions::SeekMode mode; |
Andreas Huber | 8885e67 | 2011-03-18 14:38:56 -0700 | [diff] [blame] | 402 | if (options && options->getSeekTo(&seekTimeUs, &mode) |
| 403 | && !mExtractor->isLiveStreaming()) { |
Andreas Huber | 6fe6b4c | 2011-01-11 11:56:06 -0800 | [diff] [blame] | 404 | clearPendingFrames(); |
Andreas Huber | 089d3e3 | 2011-09-07 11:05:43 -0700 | [diff] [blame] | 405 | |
| 406 | // Apparently keyframe indication in audio tracks is unreliable, |
| 407 | // fortunately in all our currently supported audio encodings every |
| 408 | // frame is effectively a keyframe. |
| 409 | mBlockIter.seek(seekTimeUs, !mIsAudio); |
Andreas Huber | 072f524 | 2010-05-20 14:56:53 -0700 | [diff] [blame] | 410 | } |
| 411 | |
Andreas Huber | 0f62458 | 2010-11-15 15:10:34 -0800 | [diff] [blame] | 412 | again: |
Andreas Huber | 6fe6b4c | 2011-01-11 11:56:06 -0800 | [diff] [blame] | 413 | while (mPendingFrames.empty()) { |
| 414 | status_t err = readBlock(); |
| 415 | |
| 416 | if (err != OK) { |
| 417 | clearPendingFrames(); |
| 418 | |
| 419 | return err; |
| 420 | } |
Andreas Huber | 072f524 | 2010-05-20 14:56:53 -0700 | [diff] [blame] | 421 | } |
| 422 | |
Andreas Huber | 6fe6b4c | 2011-01-11 11:56:06 -0800 | [diff] [blame] | 423 | MediaBuffer *frame = *mPendingFrames.begin(); |
| 424 | mPendingFrames.erase(mPendingFrames.begin()); |
| 425 | |
Andreas Huber | 6fe6b4c | 2011-01-11 11:56:06 -0800 | [diff] [blame] | 426 | if (mType != AVC) { |
| 427 | *out = frame; |
| 428 | |
| 429 | return OK; |
| 430 | } |
| 431 | |
Andreas Huber | 2378341 | 2011-09-28 15:06:46 -0700 | [diff] [blame] | 432 | // Each input frame contains one or more NAL fragments, each fragment |
| 433 | // is prefixed by mNALSizeLen bytes giving the fragment length, |
| 434 | // followed by a corresponding number of bytes containing the fragment. |
| 435 | // We output all these fragments into a single large buffer separated |
| 436 | // by startcodes (0x00 0x00 0x00 0x01). |
Andreas Huber | 6fe6b4c | 2011-01-11 11:56:06 -0800 | [diff] [blame] | 437 | |
Andreas Huber | 2378341 | 2011-09-28 15:06:46 -0700 | [diff] [blame] | 438 | const uint8_t *srcPtr = |
| 439 | (const uint8_t *)frame->data() + frame->range_offset(); |
| 440 | |
| 441 | size_t srcSize = frame->range_length(); |
| 442 | |
| 443 | size_t dstSize = 0; |
| 444 | MediaBuffer *buffer = NULL; |
| 445 | uint8_t *dstPtr = NULL; |
| 446 | |
| 447 | for (int32_t pass = 0; pass < 2; ++pass) { |
| 448 | size_t srcOffset = 0; |
| 449 | size_t dstOffset = 0; |
| 450 | while (srcOffset + mNALSizeLen <= srcSize) { |
| 451 | size_t NALsize; |
| 452 | switch (mNALSizeLen) { |
| 453 | case 1: NALsize = srcPtr[srcOffset]; break; |
| 454 | case 2: NALsize = U16_AT(srcPtr + srcOffset); break; |
| 455 | case 3: NALsize = U24_AT(srcPtr + srcOffset); break; |
| 456 | case 4: NALsize = U32_AT(srcPtr + srcOffset); break; |
| 457 | default: |
| 458 | TRESPASS(); |
| 459 | } |
| 460 | |
| 461 | if (srcOffset + mNALSizeLen + NALsize > srcSize) { |
| 462 | break; |
| 463 | } |
| 464 | |
| 465 | if (pass == 1) { |
| 466 | memcpy(&dstPtr[dstOffset], "\x00\x00\x00\x01", 4); |
| 467 | |
| 468 | memcpy(&dstPtr[dstOffset + 4], |
| 469 | &srcPtr[srcOffset + mNALSizeLen], |
| 470 | NALsize); |
| 471 | } |
| 472 | |
| 473 | dstOffset += 4; // 0x00 00 00 01 |
| 474 | dstOffset += NALsize; |
| 475 | |
| 476 | srcOffset += mNALSizeLen + NALsize; |
| 477 | } |
| 478 | |
| 479 | if (srcOffset < srcSize) { |
| 480 | // There were trailing bytes or not enough data to complete |
| 481 | // a fragment. |
| 482 | |
| 483 | frame->release(); |
| 484 | frame = NULL; |
| 485 | |
| 486 | return ERROR_MALFORMED; |
| 487 | } |
| 488 | |
| 489 | if (pass == 0) { |
| 490 | dstSize = dstOffset; |
| 491 | |
| 492 | buffer = new MediaBuffer(dstSize); |
| 493 | |
| 494 | int64_t timeUs; |
| 495 | CHECK(frame->meta_data()->findInt64(kKeyTime, &timeUs)); |
| 496 | int32_t isSync; |
| 497 | CHECK(frame->meta_data()->findInt32(kKeyIsSyncFrame, &isSync)); |
| 498 | |
| 499 | buffer->meta_data()->setInt64(kKeyTime, timeUs); |
| 500 | buffer->meta_data()->setInt32(kKeyIsSyncFrame, isSync); |
| 501 | |
| 502 | dstPtr = (uint8_t *)buffer->data(); |
| 503 | } |
Andreas Huber | 6fe6b4c | 2011-01-11 11:56:06 -0800 | [diff] [blame] | 504 | } |
Andreas Huber | 072f524 | 2010-05-20 14:56:53 -0700 | [diff] [blame] | 505 | |
Andreas Huber | 6fe6b4c | 2011-01-11 11:56:06 -0800 | [diff] [blame] | 506 | frame->release(); |
| 507 | frame = NULL; |
Andreas Huber | 072f524 | 2010-05-20 14:56:53 -0700 | [diff] [blame] | 508 | |
Andreas Huber | 072f524 | 2010-05-20 14:56:53 -0700 | [diff] [blame] | 509 | *out = buffer; |
| 510 | |
Andreas Huber | 072f524 | 2010-05-20 14:56:53 -0700 | [diff] [blame] | 511 | return OK; |
| 512 | } |
| 513 | |
| 514 | //////////////////////////////////////////////////////////////////////////////// |
| 515 | |
| 516 | MatroskaExtractor::MatroskaExtractor(const sp<DataSource> &source) |
| 517 | : mDataSource(source), |
| 518 | mReader(new DataSourceReader(mDataSource)), |
Andreas Huber | 6bdf2ed | 2010-05-25 13:35:02 -0700 | [diff] [blame] | 519 | mSegment(NULL), |
Andreas Huber | 6e37cf9 | 2011-08-22 13:21:26 -0700 | [diff] [blame] | 520 | mExtractedThumbnails(false), |
| 521 | mIsWebm(false) { |
Andreas Huber | 8885e67 | 2011-03-18 14:38:56 -0700 | [diff] [blame] | 522 | off64_t size; |
| 523 | mIsLiveStreaming = |
| 524 | (mDataSource->flags() |
| 525 | & (DataSource::kWantsPrefetching |
| 526 | | DataSource::kIsCachingDataSource)) |
| 527 | && mDataSource->getSize(&size) != OK; |
| 528 | |
Andreas Huber | 072f524 | 2010-05-20 14:56:53 -0700 | [diff] [blame] | 529 | mkvparser::EBMLHeader ebmlHeader; |
| 530 | long long pos; |
| 531 | if (ebmlHeader.Parse(mReader, pos) < 0) { |
| 532 | return; |
| 533 | } |
| 534 | |
Andreas Huber | 6e37cf9 | 2011-08-22 13:21:26 -0700 | [diff] [blame] | 535 | if (ebmlHeader.m_docType && !strcmp("webm", ebmlHeader.m_docType)) { |
| 536 | mIsWebm = true; |
| 537 | } |
| 538 | |
Andreas Huber | 072f524 | 2010-05-20 14:56:53 -0700 | [diff] [blame] | 539 | long long ret = |
| 540 | mkvparser::Segment::CreateInstance(mReader, pos, mSegment); |
| 541 | |
| 542 | if (ret) { |
| 543 | CHECK(mSegment == NULL); |
| 544 | return; |
| 545 | } |
| 546 | |
Andreas Huber | 8885e67 | 2011-03-18 14:38:56 -0700 | [diff] [blame] | 547 | if (isLiveStreaming()) { |
| 548 | ret = mSegment->ParseHeaders(); |
| 549 | CHECK_EQ(ret, 0); |
| 550 | |
| 551 | long len; |
| 552 | ret = mSegment->LoadCluster(pos, len); |
| 553 | CHECK_EQ(ret, 0); |
| 554 | } else { |
| 555 | ret = mSegment->Load(); |
| 556 | } |
Andreas Huber | 072f524 | 2010-05-20 14:56:53 -0700 | [diff] [blame] | 557 | |
| 558 | if (ret < 0) { |
| 559 | delete mSegment; |
| 560 | mSegment = NULL; |
| 561 | return; |
| 562 | } |
| 563 | |
Andreas Huber | 089d3e3 | 2011-09-07 11:05:43 -0700 | [diff] [blame] | 564 | #if 0 |
| 565 | const mkvparser::SegmentInfo *info = mSegment->GetInfo(); |
Steve Block | 6215d3f | 2012-01-04 20:05:49 +0000 | [diff] [blame] | 566 | ALOGI("muxing app: %s, writing app: %s", |
Andreas Huber | 089d3e3 | 2011-09-07 11:05:43 -0700 | [diff] [blame] | 567 | info->GetMuxingAppAsUTF8(), |
| 568 | info->GetWritingAppAsUTF8()); |
| 569 | #endif |
| 570 | |
Andreas Huber | 072f524 | 2010-05-20 14:56:53 -0700 | [diff] [blame] | 571 | addTracks(); |
| 572 | } |
| 573 | |
| 574 | MatroskaExtractor::~MatroskaExtractor() { |
| 575 | delete mSegment; |
| 576 | mSegment = NULL; |
| 577 | |
| 578 | delete mReader; |
| 579 | mReader = NULL; |
| 580 | } |
| 581 | |
| 582 | size_t MatroskaExtractor::countTracks() { |
| 583 | return mTracks.size(); |
| 584 | } |
| 585 | |
| 586 | sp<MediaSource> MatroskaExtractor::getTrack(size_t index) { |
| 587 | if (index >= mTracks.size()) { |
| 588 | return NULL; |
| 589 | } |
| 590 | |
| 591 | return new MatroskaSource(this, index); |
| 592 | } |
| 593 | |
| 594 | sp<MetaData> MatroskaExtractor::getTrackMetaData( |
| 595 | size_t index, uint32_t flags) { |
| 596 | if (index >= mTracks.size()) { |
| 597 | return NULL; |
| 598 | } |
| 599 | |
Andreas Huber | 8885e67 | 2011-03-18 14:38:56 -0700 | [diff] [blame] | 600 | if ((flags & kIncludeExtensiveMetaData) && !mExtractedThumbnails |
| 601 | && !isLiveStreaming()) { |
Andreas Huber | 6bdf2ed | 2010-05-25 13:35:02 -0700 | [diff] [blame] | 602 | findThumbnails(); |
| 603 | mExtractedThumbnails = true; |
| 604 | } |
| 605 | |
Andreas Huber | 072f524 | 2010-05-20 14:56:53 -0700 | [diff] [blame] | 606 | return mTracks.itemAt(index).mMeta; |
| 607 | } |
| 608 | |
Andreas Huber | 8885e67 | 2011-03-18 14:38:56 -0700 | [diff] [blame] | 609 | bool MatroskaExtractor::isLiveStreaming() const { |
| 610 | return mIsLiveStreaming; |
| 611 | } |
| 612 | |
Andreas Huber | 072f524 | 2010-05-20 14:56:53 -0700 | [diff] [blame] | 613 | static void addESDSFromAudioSpecificInfo( |
| 614 | const sp<MetaData> &meta, const void *asi, size_t asiSize) { |
| 615 | static const uint8_t kStaticESDS[] = { |
| 616 | 0x03, 22, |
| 617 | 0x00, 0x00, // ES_ID |
| 618 | 0x00, // streamDependenceFlag, URL_Flag, OCRstreamFlag |
| 619 | |
| 620 | 0x04, 17, |
| 621 | 0x40, // Audio ISO/IEC 14496-3 |
| 622 | 0x00, 0x00, 0x00, 0x00, |
| 623 | 0x00, 0x00, 0x00, 0x00, |
| 624 | 0x00, 0x00, 0x00, 0x00, |
| 625 | |
| 626 | 0x05, |
| 627 | // AudioSpecificInfo (with size prefix) follows |
| 628 | }; |
| 629 | |
Andreas Huber | 65b9605 | 2011-05-04 09:48:46 -0700 | [diff] [blame] | 630 | // Make sure all sizes can be coded in a single byte. |
| 631 | CHECK(asiSize + 22 - 2 < 128); |
Andreas Huber | 072f524 | 2010-05-20 14:56:53 -0700 | [diff] [blame] | 632 | size_t esdsSize = sizeof(kStaticESDS) + asiSize + 1; |
| 633 | uint8_t *esds = new uint8_t[esdsSize]; |
| 634 | memcpy(esds, kStaticESDS, sizeof(kStaticESDS)); |
| 635 | uint8_t *ptr = esds + sizeof(kStaticESDS); |
| 636 | *ptr++ = asiSize; |
| 637 | memcpy(ptr, asi, asiSize); |
| 638 | |
Andreas Huber | 65b9605 | 2011-05-04 09:48:46 -0700 | [diff] [blame] | 639 | // Increment by codecPrivateSize less 2 bytes that are accounted for |
| 640 | // already in lengths of 22/17 |
| 641 | esds[1] += asiSize - 2; |
| 642 | esds[6] += asiSize - 2; |
| 643 | |
Andreas Huber | 072f524 | 2010-05-20 14:56:53 -0700 | [diff] [blame] | 644 | meta->setData(kKeyESDS, 0, esds, esdsSize); |
| 645 | |
| 646 | delete[] esds; |
| 647 | esds = NULL; |
| 648 | } |
| 649 | |
| 650 | void addVorbisCodecInfo( |
| 651 | const sp<MetaData> &meta, |
| 652 | const void *_codecPrivate, size_t codecPrivateSize) { |
| 653 | // printf("vorbis private data follows:\n"); |
| 654 | // hexdump(_codecPrivate, codecPrivateSize); |
| 655 | |
| 656 | CHECK(codecPrivateSize >= 3); |
| 657 | |
| 658 | const uint8_t *codecPrivate = (const uint8_t *)_codecPrivate; |
| 659 | CHECK(codecPrivate[0] == 0x02); |
| 660 | |
| 661 | size_t len1 = codecPrivate[1]; |
| 662 | size_t len2 = codecPrivate[2]; |
| 663 | |
| 664 | CHECK(codecPrivateSize > 3 + len1 + len2); |
| 665 | |
| 666 | CHECK(codecPrivate[3] == 0x01); |
| 667 | meta->setData(kKeyVorbisInfo, 0, &codecPrivate[3], len1); |
| 668 | |
| 669 | CHECK(codecPrivate[len1 + 3] == 0x03); |
| 670 | |
| 671 | CHECK(codecPrivate[len1 + len2 + 3] == 0x05); |
| 672 | meta->setData( |
| 673 | kKeyVorbisBooks, 0, &codecPrivate[len1 + len2 + 3], |
| 674 | codecPrivateSize - len1 - len2 - 3); |
| 675 | } |
| 676 | |
| 677 | void MatroskaExtractor::addTracks() { |
| 678 | const mkvparser::Tracks *tracks = mSegment->GetTracks(); |
| 679 | |
| 680 | for (size_t index = 0; index < tracks->GetTracksCount(); ++index) { |
| 681 | const mkvparser::Track *track = tracks->GetTrackByIndex(index); |
| 682 | |
Andreas Huber | dfe8d9b | 2011-01-24 12:46:12 -0800 | [diff] [blame] | 683 | if (track == NULL) { |
| 684 | // Apparently this is currently valid (if unexpected) behaviour |
| 685 | // of the mkv parser lib. |
| 686 | continue; |
| 687 | } |
| 688 | |
Andreas Huber | 072f524 | 2010-05-20 14:56:53 -0700 | [diff] [blame] | 689 | const char *const codecID = track->GetCodecId(); |
Steve Block | 71f2cf1 | 2011-10-20 11:56:00 +0100 | [diff] [blame] | 690 | ALOGV("codec id = %s", codecID); |
| 691 | ALOGV("codec name = %s", track->GetCodecNameAsUTF8()); |
Andreas Huber | 072f524 | 2010-05-20 14:56:53 -0700 | [diff] [blame] | 692 | |
| 693 | size_t codecPrivateSize; |
| 694 | const unsigned char *codecPrivate = |
Andreas Huber | 4b84445 | 2010-10-28 10:50:47 -0700 | [diff] [blame] | 695 | track->GetCodecPrivate(codecPrivateSize); |
Andreas Huber | 072f524 | 2010-05-20 14:56:53 -0700 | [diff] [blame] | 696 | |
| 697 | enum { VIDEO_TRACK = 1, AUDIO_TRACK = 2 }; |
| 698 | |
| 699 | sp<MetaData> meta = new MetaData; |
| 700 | |
| 701 | switch (track->GetType()) { |
| 702 | case VIDEO_TRACK: |
| 703 | { |
| 704 | const mkvparser::VideoTrack *vtrack = |
| 705 | static_cast<const mkvparser::VideoTrack *>(track); |
| 706 | |
| 707 | if (!strcmp("V_MPEG4/ISO/AVC", codecID)) { |
| 708 | meta->setCString(kKeyMIMEType, MEDIA_MIMETYPE_VIDEO_AVC); |
| 709 | meta->setData(kKeyAVCC, 0, codecPrivate, codecPrivateSize); |
| 710 | } else if (!strcmp("V_VP8", codecID)) { |
| 711 | meta->setCString(kKeyMIMEType, MEDIA_MIMETYPE_VIDEO_VPX); |
| 712 | } else { |
| 713 | continue; |
| 714 | } |
| 715 | |
| 716 | meta->setInt32(kKeyWidth, vtrack->GetWidth()); |
| 717 | meta->setInt32(kKeyHeight, vtrack->GetHeight()); |
| 718 | break; |
| 719 | } |
| 720 | |
| 721 | case AUDIO_TRACK: |
| 722 | { |
| 723 | const mkvparser::AudioTrack *atrack = |
| 724 | static_cast<const mkvparser::AudioTrack *>(track); |
| 725 | |
| 726 | if (!strcmp("A_AAC", codecID)) { |
| 727 | meta->setCString(kKeyMIMEType, MEDIA_MIMETYPE_AUDIO_AAC); |
| 728 | CHECK(codecPrivateSize >= 2); |
| 729 | |
| 730 | addESDSFromAudioSpecificInfo( |
| 731 | meta, codecPrivate, codecPrivateSize); |
| 732 | } else if (!strcmp("A_VORBIS", codecID)) { |
| 733 | meta->setCString(kKeyMIMEType, MEDIA_MIMETYPE_AUDIO_VORBIS); |
| 734 | |
| 735 | addVorbisCodecInfo(meta, codecPrivate, codecPrivateSize); |
| 736 | } else { |
| 737 | continue; |
| 738 | } |
| 739 | |
| 740 | meta->setInt32(kKeySampleRate, atrack->GetSamplingRate()); |
| 741 | meta->setInt32(kKeyChannelCount, atrack->GetChannels()); |
| 742 | break; |
| 743 | } |
| 744 | |
| 745 | default: |
| 746 | continue; |
| 747 | } |
| 748 | |
| 749 | long long durationNs = mSegment->GetDuration(); |
| 750 | meta->setInt64(kKeyDuration, (durationNs + 500) / 1000); |
| 751 | |
| 752 | mTracks.push(); |
| 753 | TrackInfo *trackInfo = &mTracks.editItemAt(mTracks.size() - 1); |
| 754 | trackInfo->mTrackNum = track->GetNumber(); |
| 755 | trackInfo->mMeta = meta; |
| 756 | } |
| 757 | } |
| 758 | |
Andreas Huber | 6bdf2ed | 2010-05-25 13:35:02 -0700 | [diff] [blame] | 759 | void MatroskaExtractor::findThumbnails() { |
| 760 | for (size_t i = 0; i < mTracks.size(); ++i) { |
| 761 | TrackInfo *info = &mTracks.editItemAt(i); |
| 762 | |
| 763 | const char *mime; |
| 764 | CHECK(info->mMeta->findCString(kKeyMIMEType, &mime)); |
| 765 | |
| 766 | if (strncasecmp(mime, "video/", 6)) { |
| 767 | continue; |
| 768 | } |
| 769 | |
Andreas Huber | 8885e67 | 2011-03-18 14:38:56 -0700 | [diff] [blame] | 770 | BlockIterator iter(this, info->mTrackNum); |
Andreas Huber | 6bdf2ed | 2010-05-25 13:35:02 -0700 | [diff] [blame] | 771 | int32_t i = 0; |
| 772 | int64_t thumbnailTimeUs = 0; |
| 773 | size_t maxBlockSize = 0; |
| 774 | while (!iter.eos() && i < 20) { |
| 775 | if (iter.block()->IsKey()) { |
| 776 | ++i; |
| 777 | |
Andreas Huber | 8885e67 | 2011-03-18 14:38:56 -0700 | [diff] [blame] | 778 | size_t blockSize = 0; |
| 779 | for (int i = 0; i < iter.block()->GetFrameCount(); ++i) { |
| 780 | blockSize += iter.block()->GetFrame(i).len; |
| 781 | } |
| 782 | |
Andreas Huber | 6bdf2ed | 2010-05-25 13:35:02 -0700 | [diff] [blame] | 783 | if (blockSize > maxBlockSize) { |
| 784 | maxBlockSize = blockSize; |
| 785 | thumbnailTimeUs = iter.blockTimeUs(); |
| 786 | } |
| 787 | } |
| 788 | iter.advance(); |
| 789 | } |
| 790 | info->mMeta->setInt64(kKeyThumbnailTime, thumbnailTimeUs); |
| 791 | } |
| 792 | } |
| 793 | |
Andreas Huber | 072f524 | 2010-05-20 14:56:53 -0700 | [diff] [blame] | 794 | sp<MetaData> MatroskaExtractor::getMetaData() { |
| 795 | sp<MetaData> meta = new MetaData; |
Andreas Huber | 6e37cf9 | 2011-08-22 13:21:26 -0700 | [diff] [blame] | 796 | |
| 797 | meta->setCString( |
| 798 | kKeyMIMEType, |
| 799 | mIsWebm ? "video/webm" : MEDIA_MIMETYPE_CONTAINER_MATROSKA); |
Andreas Huber | 072f524 | 2010-05-20 14:56:53 -0700 | [diff] [blame] | 800 | |
| 801 | return meta; |
| 802 | } |
| 803 | |
Andreas Huber | 8885e67 | 2011-03-18 14:38:56 -0700 | [diff] [blame] | 804 | uint32_t MatroskaExtractor::flags() const { |
| 805 | uint32_t x = CAN_PAUSE; |
| 806 | if (!isLiveStreaming()) { |
| 807 | x |= CAN_SEEK_BACKWARD | CAN_SEEK_FORWARD | CAN_SEEK; |
| 808 | } |
| 809 | |
| 810 | return x; |
| 811 | } |
| 812 | |
Andreas Huber | 072f524 | 2010-05-20 14:56:53 -0700 | [diff] [blame] | 813 | bool SniffMatroska( |
Andreas Huber | efdd088 | 2010-08-25 11:09:41 -0700 | [diff] [blame] | 814 | const sp<DataSource> &source, String8 *mimeType, float *confidence, |
| 815 | sp<AMessage> *) { |
Andreas Huber | 072f524 | 2010-05-20 14:56:53 -0700 | [diff] [blame] | 816 | DataSourceReader reader(source); |
| 817 | mkvparser::EBMLHeader ebmlHeader; |
| 818 | long long pos; |
| 819 | if (ebmlHeader.Parse(&reader, pos) < 0) { |
| 820 | return false; |
| 821 | } |
| 822 | |
| 823 | mimeType->setTo(MEDIA_MIMETYPE_CONTAINER_MATROSKA); |
| 824 | *confidence = 0.6; |
| 825 | |
| 826 | return true; |
| 827 | } |
| 828 | |
| 829 | } // namespace android |