Andreas Huber | f8374de | 2011-03-24 14:18:02 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2011 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 "AVIExtractor" |
| 19 | #include <utils/Log.h> |
| 20 | |
Andreas Huber | c639aad | 2011-09-21 13:19:54 -0700 | [diff] [blame] | 21 | #include "include/avc_utils.h" |
Andreas Huber | f8374de | 2011-03-24 14:18:02 -0700 | [diff] [blame] | 22 | #include "include/AVIExtractor.h" |
| 23 | |
| 24 | #include <binder/ProcessState.h> |
| 25 | #include <media/stagefright/foundation/hexdump.h> |
| 26 | #include <media/stagefright/foundation/ABuffer.h> |
| 27 | #include <media/stagefright/foundation/ADebug.h> |
| 28 | #include <media/stagefright/DataSource.h> |
| 29 | #include <media/stagefright/MediaBuffer.h> |
| 30 | #include <media/stagefright/MediaBufferGroup.h> |
| 31 | #include <media/stagefright/MediaDefs.h> |
| 32 | #include <media/stagefright/MediaErrors.h> |
| 33 | #include <media/stagefright/MetaData.h> |
| 34 | #include <media/stagefright/Utils.h> |
| 35 | |
| 36 | namespace android { |
| 37 | |
| 38 | struct AVIExtractor::AVISource : public MediaSource { |
| 39 | AVISource(const sp<AVIExtractor> &extractor, size_t trackIndex); |
| 40 | |
| 41 | virtual status_t start(MetaData *params); |
| 42 | virtual status_t stop(); |
| 43 | |
| 44 | virtual sp<MetaData> getFormat(); |
| 45 | |
| 46 | virtual status_t read( |
| 47 | MediaBuffer **buffer, const ReadOptions *options); |
| 48 | |
| 49 | protected: |
| 50 | virtual ~AVISource(); |
| 51 | |
| 52 | private: |
| 53 | sp<AVIExtractor> mExtractor; |
| 54 | size_t mTrackIndex; |
| 55 | const AVIExtractor::Track &mTrack; |
| 56 | MediaBufferGroup *mBufferGroup; |
| 57 | size_t mSampleIndex; |
| 58 | |
Andreas Huber | 32e1832 | 2011-09-23 14:05:49 -0700 | [diff] [blame] | 59 | sp<MP3Splitter> mSplitter; |
| 60 | |
Andreas Huber | f8374de | 2011-03-24 14:18:02 -0700 | [diff] [blame] | 61 | DISALLOW_EVIL_CONSTRUCTORS(AVISource); |
| 62 | }; |
| 63 | |
| 64 | //////////////////////////////////////////////////////////////////////////////// |
| 65 | |
Andreas Huber | 32e1832 | 2011-09-23 14:05:49 -0700 | [diff] [blame] | 66 | struct AVIExtractor::MP3Splitter : public RefBase { |
| 67 | MP3Splitter(); |
| 68 | |
| 69 | void clear(); |
| 70 | void append(MediaBuffer *buffer); |
| 71 | status_t read(MediaBuffer **buffer); |
| 72 | |
| 73 | protected: |
| 74 | virtual ~MP3Splitter(); |
| 75 | |
| 76 | private: |
| 77 | bool mFindSync; |
| 78 | int64_t mBaseTimeUs; |
| 79 | int64_t mNumSamplesRead; |
| 80 | sp<ABuffer> mBuffer; |
| 81 | |
| 82 | bool resync(); |
| 83 | |
| 84 | DISALLOW_EVIL_CONSTRUCTORS(MP3Splitter); |
| 85 | }; |
| 86 | |
| 87 | //////////////////////////////////////////////////////////////////////////////// |
| 88 | |
Andreas Huber | f8374de | 2011-03-24 14:18:02 -0700 | [diff] [blame] | 89 | AVIExtractor::AVISource::AVISource( |
| 90 | const sp<AVIExtractor> &extractor, size_t trackIndex) |
| 91 | : mExtractor(extractor), |
| 92 | mTrackIndex(trackIndex), |
| 93 | mTrack(mExtractor->mTracks.itemAt(trackIndex)), |
| 94 | mBufferGroup(NULL) { |
| 95 | } |
| 96 | |
| 97 | AVIExtractor::AVISource::~AVISource() { |
| 98 | if (mBufferGroup) { |
| 99 | stop(); |
| 100 | } |
| 101 | } |
| 102 | |
| 103 | status_t AVIExtractor::AVISource::start(MetaData *params) { |
| 104 | CHECK(!mBufferGroup); |
| 105 | |
| 106 | mBufferGroup = new MediaBufferGroup; |
| 107 | |
| 108 | mBufferGroup->add_buffer(new MediaBuffer(mTrack.mMaxSampleSize)); |
| 109 | mBufferGroup->add_buffer(new MediaBuffer(mTrack.mMaxSampleSize)); |
| 110 | mSampleIndex = 0; |
| 111 | |
Andreas Huber | 32e1832 | 2011-09-23 14:05:49 -0700 | [diff] [blame] | 112 | const char *mime; |
| 113 | CHECK(mTrack.mMeta->findCString(kKeyMIMEType, &mime)); |
| 114 | |
| 115 | if (!strcasecmp(mime, MEDIA_MIMETYPE_AUDIO_MPEG)) { |
| 116 | mSplitter = new MP3Splitter; |
| 117 | } else { |
| 118 | mSplitter.clear(); |
| 119 | } |
| 120 | |
Andreas Huber | f8374de | 2011-03-24 14:18:02 -0700 | [diff] [blame] | 121 | return OK; |
| 122 | } |
| 123 | |
| 124 | status_t AVIExtractor::AVISource::stop() { |
| 125 | CHECK(mBufferGroup); |
| 126 | |
| 127 | delete mBufferGroup; |
| 128 | mBufferGroup = NULL; |
| 129 | |
Andreas Huber | 32e1832 | 2011-09-23 14:05:49 -0700 | [diff] [blame] | 130 | mSplitter.clear(); |
| 131 | |
Andreas Huber | f8374de | 2011-03-24 14:18:02 -0700 | [diff] [blame] | 132 | return OK; |
| 133 | } |
| 134 | |
| 135 | sp<MetaData> AVIExtractor::AVISource::getFormat() { |
| 136 | return mTrack.mMeta; |
| 137 | } |
| 138 | |
| 139 | status_t AVIExtractor::AVISource::read( |
| 140 | MediaBuffer **buffer, const ReadOptions *options) { |
| 141 | CHECK(mBufferGroup); |
| 142 | |
| 143 | *buffer = NULL; |
| 144 | |
| 145 | int64_t seekTimeUs; |
| 146 | ReadOptions::SeekMode seekMode; |
| 147 | if (options && options->getSeekTo(&seekTimeUs, &seekMode)) { |
| 148 | status_t err = |
| 149 | mExtractor->getSampleIndexAtTime( |
| 150 | mTrackIndex, seekTimeUs, seekMode, &mSampleIndex); |
| 151 | |
| 152 | if (err != OK) { |
| 153 | return ERROR_END_OF_STREAM; |
| 154 | } |
Andreas Huber | 32e1832 | 2011-09-23 14:05:49 -0700 | [diff] [blame] | 155 | |
| 156 | if (mSplitter != NULL) { |
| 157 | mSplitter->clear(); |
| 158 | } |
Andreas Huber | f8374de | 2011-03-24 14:18:02 -0700 | [diff] [blame] | 159 | } |
| 160 | |
Andreas Huber | 32e1832 | 2011-09-23 14:05:49 -0700 | [diff] [blame] | 161 | for (;;) { |
| 162 | if (mSplitter != NULL) { |
| 163 | status_t err = mSplitter->read(buffer); |
Andreas Huber | f8374de | 2011-03-24 14:18:02 -0700 | [diff] [blame] | 164 | |
Andreas Huber | 32e1832 | 2011-09-23 14:05:49 -0700 | [diff] [blame] | 165 | if (err == OK) { |
| 166 | break; |
| 167 | } else if (err != -EAGAIN) { |
| 168 | return err; |
| 169 | } |
| 170 | } |
Andreas Huber | f8374de | 2011-03-24 14:18:02 -0700 | [diff] [blame] | 171 | |
Andreas Huber | 32e1832 | 2011-09-23 14:05:49 -0700 | [diff] [blame] | 172 | off64_t offset; |
| 173 | size_t size; |
| 174 | bool isKey; |
| 175 | int64_t timeUs; |
| 176 | status_t err = mExtractor->getSampleInfo( |
| 177 | mTrackIndex, mSampleIndex, &offset, &size, &isKey, &timeUs); |
| 178 | |
| 179 | ++mSampleIndex; |
| 180 | |
| 181 | if (err != OK) { |
| 182 | return ERROR_END_OF_STREAM; |
| 183 | } |
| 184 | |
| 185 | MediaBuffer *out; |
| 186 | CHECK_EQ(mBufferGroup->acquire_buffer(&out), (status_t)OK); |
| 187 | |
| 188 | ssize_t n = mExtractor->mDataSource->readAt(offset, out->data(), size); |
| 189 | |
| 190 | if (n < (ssize_t)size) { |
| 191 | return n < 0 ? (status_t)n : (status_t)ERROR_MALFORMED; |
| 192 | } |
| 193 | |
| 194 | out->set_range(0, size); |
| 195 | |
| 196 | out->meta_data()->setInt64(kKeyTime, timeUs); |
| 197 | |
| 198 | if (isKey) { |
| 199 | out->meta_data()->setInt32(kKeyIsSyncFrame, 1); |
| 200 | } |
| 201 | |
| 202 | if (mSplitter == NULL) { |
| 203 | *buffer = out; |
| 204 | break; |
| 205 | } |
| 206 | |
| 207 | mSplitter->append(out); |
| 208 | out->release(); |
| 209 | out = NULL; |
Andreas Huber | f8374de | 2011-03-24 14:18:02 -0700 | [diff] [blame] | 210 | } |
| 211 | |
Andreas Huber | 32e1832 | 2011-09-23 14:05:49 -0700 | [diff] [blame] | 212 | return OK; |
| 213 | } |
Andreas Huber | f8374de | 2011-03-24 14:18:02 -0700 | [diff] [blame] | 214 | |
Andreas Huber | 32e1832 | 2011-09-23 14:05:49 -0700 | [diff] [blame] | 215 | //////////////////////////////////////////////////////////////////////////////// |
Andreas Huber | f8374de | 2011-03-24 14:18:02 -0700 | [diff] [blame] | 216 | |
Andreas Huber | 32e1832 | 2011-09-23 14:05:49 -0700 | [diff] [blame] | 217 | AVIExtractor::MP3Splitter::MP3Splitter() |
| 218 | : mFindSync(true), |
| 219 | mBaseTimeUs(-1ll), |
| 220 | mNumSamplesRead(0) { |
| 221 | } |
| 222 | |
| 223 | AVIExtractor::MP3Splitter::~MP3Splitter() { |
| 224 | } |
| 225 | |
| 226 | void AVIExtractor::MP3Splitter::clear() { |
| 227 | mFindSync = true; |
| 228 | mBaseTimeUs = -1ll; |
| 229 | mNumSamplesRead = 0; |
| 230 | |
| 231 | if (mBuffer != NULL) { |
| 232 | mBuffer->setRange(0, 0); |
| 233 | } |
| 234 | } |
| 235 | |
| 236 | void AVIExtractor::MP3Splitter::append(MediaBuffer *buffer) { |
| 237 | size_t prevCapacity = (mBuffer != NULL) ? mBuffer->capacity() : 0; |
| 238 | |
| 239 | if (mBaseTimeUs < 0) { |
| 240 | CHECK(mBuffer == NULL || mBuffer->size() == 0); |
| 241 | CHECK(buffer->meta_data()->findInt64(kKeyTime, &mBaseTimeUs)); |
| 242 | mNumSamplesRead = 0; |
Andreas Huber | f8374de | 2011-03-24 14:18:02 -0700 | [diff] [blame] | 243 | } |
| 244 | |
Andreas Huber | 32e1832 | 2011-09-23 14:05:49 -0700 | [diff] [blame] | 245 | if (mBuffer != NULL && mBuffer->offset() > 0) { |
| 246 | memmove(mBuffer->base(), mBuffer->data(), mBuffer->size()); |
| 247 | mBuffer->setRange(0, mBuffer->size()); |
Andreas Huber | f8374de | 2011-03-24 14:18:02 -0700 | [diff] [blame] | 248 | } |
| 249 | |
Andreas Huber | 32e1832 | 2011-09-23 14:05:49 -0700 | [diff] [blame] | 250 | if (mBuffer == NULL |
| 251 | || mBuffer->size() + buffer->range_length() > prevCapacity) { |
| 252 | size_t newCapacity = |
| 253 | (prevCapacity + buffer->range_length() + 1023) & ~1023; |
| 254 | |
| 255 | sp<ABuffer> newBuffer = new ABuffer(newCapacity); |
| 256 | if (mBuffer != NULL) { |
| 257 | memcpy(newBuffer->data(), mBuffer->data(), mBuffer->size()); |
| 258 | newBuffer->setRange(0, mBuffer->size()); |
| 259 | } else { |
| 260 | newBuffer->setRange(0, 0); |
| 261 | } |
| 262 | mBuffer = newBuffer; |
| 263 | } |
| 264 | |
| 265 | memcpy(mBuffer->data() + mBuffer->size(), |
| 266 | (const uint8_t *)buffer->data() + buffer->range_offset(), |
| 267 | buffer->range_length()); |
| 268 | |
| 269 | mBuffer->setRange(0, mBuffer->size() + buffer->range_length()); |
| 270 | } |
| 271 | |
| 272 | bool AVIExtractor::MP3Splitter::resync() { |
| 273 | if (mBuffer == NULL) { |
| 274 | return false; |
| 275 | } |
| 276 | |
| 277 | bool foundSync = false; |
| 278 | for (size_t offset = 0; offset + 3 < mBuffer->size(); ++offset) { |
| 279 | uint32_t firstHeader = U32_AT(mBuffer->data() + offset); |
| 280 | |
| 281 | size_t frameSize; |
| 282 | if (!GetMPEGAudioFrameSize(firstHeader, &frameSize)) { |
| 283 | continue; |
| 284 | } |
| 285 | |
| 286 | size_t subsequentOffset = offset + frameSize; |
| 287 | size_t i = 3; |
| 288 | while (i > 0) { |
| 289 | if (subsequentOffset + 3 >= mBuffer->size()) { |
| 290 | break; |
| 291 | } |
| 292 | |
| 293 | static const uint32_t kMask = 0xfffe0c00; |
| 294 | |
| 295 | uint32_t header = U32_AT(mBuffer->data() + subsequentOffset); |
| 296 | if ((header & kMask) != (firstHeader & kMask)) { |
| 297 | break; |
| 298 | } |
| 299 | |
| 300 | if (!GetMPEGAudioFrameSize(header, &frameSize)) { |
| 301 | break; |
| 302 | } |
| 303 | |
| 304 | subsequentOffset += frameSize; |
| 305 | --i; |
| 306 | } |
| 307 | |
| 308 | if (i == 0) { |
| 309 | foundSync = true; |
| 310 | memmove(mBuffer->data(), |
| 311 | mBuffer->data() + offset, |
| 312 | mBuffer->size() - offset); |
| 313 | |
| 314 | mBuffer->setRange(0, mBuffer->size() - offset); |
| 315 | break; |
| 316 | } |
| 317 | } |
| 318 | |
| 319 | return foundSync; |
| 320 | } |
| 321 | |
| 322 | status_t AVIExtractor::MP3Splitter::read(MediaBuffer **out) { |
| 323 | *out = NULL; |
| 324 | |
| 325 | if (mFindSync) { |
| 326 | if (!resync()) { |
| 327 | return -EAGAIN; |
| 328 | } |
| 329 | |
| 330 | mFindSync = false; |
| 331 | } |
| 332 | |
| 333 | if (mBuffer->size() < 4) { |
| 334 | return -EAGAIN; |
| 335 | } |
| 336 | |
| 337 | uint32_t header = U32_AT(mBuffer->data()); |
| 338 | size_t frameSize; |
| 339 | int sampleRate; |
| 340 | int numSamples; |
| 341 | if (!GetMPEGAudioFrameSize( |
| 342 | header, &frameSize, &sampleRate, NULL, NULL, &numSamples)) { |
| 343 | return ERROR_MALFORMED; |
| 344 | } |
| 345 | |
| 346 | if (mBuffer->size() < frameSize) { |
| 347 | return -EAGAIN; |
| 348 | } |
| 349 | |
| 350 | MediaBuffer *mbuf = new MediaBuffer(frameSize); |
| 351 | memcpy(mbuf->data(), mBuffer->data(), frameSize); |
| 352 | |
| 353 | int64_t timeUs = mBaseTimeUs + (mNumSamplesRead * 1000000ll) / sampleRate; |
| 354 | mNumSamplesRead += numSamples; |
| 355 | |
| 356 | mbuf->meta_data()->setInt64(kKeyTime, timeUs); |
| 357 | |
| 358 | mBuffer->setRange( |
| 359 | mBuffer->offset() + frameSize, mBuffer->size() - frameSize); |
| 360 | |
| 361 | *out = mbuf; |
Andreas Huber | f8374de | 2011-03-24 14:18:02 -0700 | [diff] [blame] | 362 | |
| 363 | return OK; |
| 364 | } |
| 365 | |
| 366 | //////////////////////////////////////////////////////////////////////////////// |
| 367 | |
| 368 | AVIExtractor::AVIExtractor(const sp<DataSource> &dataSource) |
| 369 | : mDataSource(dataSource) { |
| 370 | mInitCheck = parseHeaders(); |
| 371 | |
| 372 | if (mInitCheck != OK) { |
| 373 | mTracks.clear(); |
| 374 | } |
| 375 | } |
| 376 | |
| 377 | AVIExtractor::~AVIExtractor() { |
| 378 | } |
| 379 | |
| 380 | size_t AVIExtractor::countTracks() { |
| 381 | return mTracks.size(); |
| 382 | } |
| 383 | |
| 384 | sp<MediaSource> AVIExtractor::getTrack(size_t index) { |
| 385 | return index < mTracks.size() ? new AVISource(this, index) : NULL; |
| 386 | } |
| 387 | |
| 388 | sp<MetaData> AVIExtractor::getTrackMetaData( |
| 389 | size_t index, uint32_t flags) { |
| 390 | return index < mTracks.size() ? mTracks.editItemAt(index).mMeta : NULL; |
| 391 | } |
| 392 | |
| 393 | sp<MetaData> AVIExtractor::getMetaData() { |
| 394 | sp<MetaData> meta = new MetaData; |
| 395 | |
| 396 | if (mInitCheck == OK) { |
| 397 | meta->setCString(kKeyMIMEType, MEDIA_MIMETYPE_CONTAINER_AVI); |
| 398 | } |
| 399 | |
| 400 | return meta; |
| 401 | } |
| 402 | |
| 403 | status_t AVIExtractor::parseHeaders() { |
| 404 | mTracks.clear(); |
| 405 | mMovieOffset = 0; |
| 406 | mFoundIndex = false; |
| 407 | mOffsetsAreAbsolute = false; |
| 408 | |
| 409 | ssize_t res = parseChunk(0ll, -1ll); |
| 410 | |
| 411 | if (res < 0) { |
| 412 | return (status_t)res; |
| 413 | } |
| 414 | |
| 415 | if (mMovieOffset == 0ll || !mFoundIndex) { |
| 416 | return ERROR_MALFORMED; |
| 417 | } |
| 418 | |
| 419 | return OK; |
| 420 | } |
| 421 | |
| 422 | ssize_t AVIExtractor::parseChunk(off64_t offset, off64_t size, int depth) { |
| 423 | if (size >= 0 && size < 8) { |
| 424 | return ERROR_MALFORMED; |
| 425 | } |
| 426 | |
| 427 | uint8_t tmp[12]; |
| 428 | ssize_t n = mDataSource->readAt(offset, tmp, 8); |
| 429 | |
| 430 | if (n < 8) { |
| 431 | return (n < 0) ? n : (ssize_t)ERROR_MALFORMED; |
| 432 | } |
| 433 | |
| 434 | uint32_t fourcc = U32_AT(tmp); |
| 435 | uint32_t chunkSize = U32LE_AT(&tmp[4]); |
| 436 | |
| 437 | if (size >= 0 && chunkSize + 8 > size) { |
| 438 | return ERROR_MALFORMED; |
| 439 | } |
| 440 | |
| 441 | static const char kPrefix[] = " "; |
| 442 | const char *prefix = &kPrefix[strlen(kPrefix) - 2 * depth]; |
| 443 | |
| 444 | if (fourcc == FOURCC('L', 'I', 'S', 'T') |
| 445 | || fourcc == FOURCC('R', 'I', 'F', 'F')) { |
| 446 | // It's a list of chunks |
| 447 | |
| 448 | if (size >= 0 && size < 12) { |
| 449 | return ERROR_MALFORMED; |
| 450 | } |
| 451 | |
| 452 | n = mDataSource->readAt(offset + 8, &tmp[8], 4); |
| 453 | |
| 454 | if (n < 4) { |
| 455 | return (n < 0) ? n : (ssize_t)ERROR_MALFORMED; |
| 456 | } |
| 457 | |
| 458 | uint32_t subFourcc = U32_AT(&tmp[8]); |
| 459 | |
Steve Block | 3856b09 | 2011-10-20 11:56:00 +0100 | [diff] [blame] | 460 | ALOGV("%s offset 0x%08llx LIST of '%c%c%c%c', size %d", |
Andreas Huber | f8374de | 2011-03-24 14:18:02 -0700 | [diff] [blame] | 461 | prefix, |
| 462 | offset, |
| 463 | (char)(subFourcc >> 24), |
| 464 | (char)((subFourcc >> 16) & 0xff), |
| 465 | (char)((subFourcc >> 8) & 0xff), |
| 466 | (char)(subFourcc & 0xff), |
| 467 | chunkSize - 4); |
| 468 | |
| 469 | if (subFourcc == FOURCC('m', 'o', 'v', 'i')) { |
| 470 | // We're not going to parse this, but will take note of the |
| 471 | // offset. |
| 472 | |
| 473 | mMovieOffset = offset; |
| 474 | } else { |
| 475 | off64_t subOffset = offset + 12; |
| 476 | off64_t subOffsetLimit = subOffset + chunkSize - 4; |
| 477 | while (subOffset < subOffsetLimit) { |
| 478 | ssize_t res = |
| 479 | parseChunk(subOffset, subOffsetLimit - subOffset, depth + 1); |
| 480 | |
| 481 | if (res < 0) { |
| 482 | return res; |
| 483 | } |
| 484 | |
| 485 | subOffset += res; |
| 486 | } |
| 487 | } |
| 488 | } else { |
Steve Block | 3856b09 | 2011-10-20 11:56:00 +0100 | [diff] [blame] | 489 | ALOGV("%s offset 0x%08llx CHUNK '%c%c%c%c'", |
Andreas Huber | f8374de | 2011-03-24 14:18:02 -0700 | [diff] [blame] | 490 | prefix, |
| 491 | offset, |
| 492 | (char)(fourcc >> 24), |
| 493 | (char)((fourcc >> 16) & 0xff), |
| 494 | (char)((fourcc >> 8) & 0xff), |
| 495 | (char)(fourcc & 0xff)); |
| 496 | |
| 497 | status_t err = OK; |
| 498 | |
| 499 | switch (fourcc) { |
| 500 | case FOURCC('s', 't', 'r', 'h'): |
| 501 | { |
| 502 | err = parseStreamHeader(offset + 8, chunkSize); |
| 503 | break; |
| 504 | } |
| 505 | |
| 506 | case FOURCC('s', 't', 'r', 'f'): |
| 507 | { |
| 508 | err = parseStreamFormat(offset + 8, chunkSize); |
| 509 | break; |
| 510 | } |
| 511 | |
| 512 | case FOURCC('i', 'd', 'x', '1'): |
| 513 | { |
| 514 | err = parseIndex(offset + 8, chunkSize); |
| 515 | break; |
| 516 | } |
| 517 | |
| 518 | default: |
| 519 | break; |
| 520 | } |
| 521 | |
| 522 | if (err != OK) { |
| 523 | return err; |
| 524 | } |
| 525 | } |
| 526 | |
| 527 | if (chunkSize & 1) { |
| 528 | ++chunkSize; |
| 529 | } |
| 530 | |
| 531 | return chunkSize + 8; |
| 532 | } |
| 533 | |
| 534 | static const char *GetMIMETypeForHandler(uint32_t handler) { |
| 535 | switch (handler) { |
| 536 | // Wow... shamelessly copied from |
| 537 | // http://wiki.multimedia.cx/index.php?title=ISO_MPEG-4 |
| 538 | |
| 539 | case FOURCC('3', 'I', 'V', '2'): |
| 540 | case FOURCC('3', 'i', 'v', '2'): |
| 541 | case FOURCC('B', 'L', 'Z', '0'): |
| 542 | case FOURCC('D', 'I', 'G', 'I'): |
| 543 | case FOURCC('D', 'I', 'V', '1'): |
| 544 | case FOURCC('d', 'i', 'v', '1'): |
| 545 | case FOURCC('D', 'I', 'V', 'X'): |
| 546 | case FOURCC('d', 'i', 'v', 'x'): |
| 547 | case FOURCC('D', 'X', '5', '0'): |
| 548 | case FOURCC('d', 'x', '5', '0'): |
| 549 | case FOURCC('D', 'X', 'G', 'M'): |
| 550 | case FOURCC('E', 'M', '4', 'A'): |
| 551 | case FOURCC('E', 'P', 'H', 'V'): |
| 552 | case FOURCC('F', 'M', 'P', '4'): |
| 553 | case FOURCC('f', 'm', 'p', '4'): |
| 554 | case FOURCC('F', 'V', 'F', 'W'): |
| 555 | case FOURCC('H', 'D', 'X', '4'): |
| 556 | case FOURCC('h', 'd', 'x', '4'): |
| 557 | case FOURCC('M', '4', 'C', 'C'): |
| 558 | case FOURCC('M', '4', 'S', '2'): |
| 559 | case FOURCC('m', '4', 's', '2'): |
| 560 | case FOURCC('M', 'P', '4', 'S'): |
| 561 | case FOURCC('m', 'p', '4', 's'): |
| 562 | case FOURCC('M', 'P', '4', 'V'): |
| 563 | case FOURCC('m', 'p', '4', 'v'): |
| 564 | case FOURCC('M', 'V', 'X', 'M'): |
| 565 | case FOURCC('R', 'M', 'P', '4'): |
| 566 | case FOURCC('S', 'E', 'D', 'G'): |
| 567 | case FOURCC('S', 'M', 'P', '4'): |
| 568 | case FOURCC('U', 'M', 'P', '4'): |
| 569 | case FOURCC('W', 'V', '1', 'F'): |
| 570 | case FOURCC('X', 'V', 'I', 'D'): |
| 571 | case FOURCC('X', 'v', 'i', 'D'): |
| 572 | case FOURCC('x', 'v', 'i', 'd'): |
| 573 | case FOURCC('X', 'V', 'I', 'X'): |
| 574 | return MEDIA_MIMETYPE_VIDEO_MPEG4; |
| 575 | |
Andreas Huber | c639aad | 2011-09-21 13:19:54 -0700 | [diff] [blame] | 576 | // from http://wiki.multimedia.cx/index.php?title=H264 |
| 577 | case FOURCC('a', 'v', 'c', '1'): |
| 578 | case FOURCC('d', 'a', 'v', 'c'): |
| 579 | case FOURCC('x', '2', '6', '4'): |
Dongwon Kang | ec2e74b | 2012-01-15 12:00:34 +0900 | [diff] [blame] | 580 | case FOURCC('H', '2', '6', '4'): |
Andreas Huber | c639aad | 2011-09-21 13:19:54 -0700 | [diff] [blame] | 581 | case FOURCC('v', 's', 's', 'h'): |
| 582 | return MEDIA_MIMETYPE_VIDEO_AVC; |
| 583 | |
Andreas Huber | f8374de | 2011-03-24 14:18:02 -0700 | [diff] [blame] | 584 | default: |
| 585 | return NULL; |
| 586 | } |
| 587 | } |
| 588 | |
| 589 | status_t AVIExtractor::parseStreamHeader(off64_t offset, size_t size) { |
| 590 | if (size != 56) { |
| 591 | return ERROR_MALFORMED; |
| 592 | } |
| 593 | |
| 594 | if (mTracks.size() > 99) { |
| 595 | return -ERANGE; |
| 596 | } |
| 597 | |
| 598 | sp<ABuffer> buffer = new ABuffer(size); |
| 599 | ssize_t n = mDataSource->readAt(offset, buffer->data(), buffer->size()); |
| 600 | |
| 601 | if (n < (ssize_t)size) { |
| 602 | return n < 0 ? (status_t)n : ERROR_MALFORMED; |
| 603 | } |
| 604 | |
| 605 | const uint8_t *data = buffer->data(); |
| 606 | |
| 607 | uint32_t type = U32_AT(data); |
| 608 | uint32_t handler = U32_AT(&data[4]); |
| 609 | uint32_t flags = U32LE_AT(&data[8]); |
| 610 | |
| 611 | sp<MetaData> meta = new MetaData; |
| 612 | |
| 613 | uint32_t rate = U32LE_AT(&data[20]); |
| 614 | uint32_t scale = U32LE_AT(&data[24]); |
| 615 | |
Andreas Huber | 7de73f4 | 2011-09-13 11:12:57 -0700 | [diff] [blame] | 616 | uint32_t sampleSize = U32LE_AT(&data[44]); |
| 617 | |
Andreas Huber | f8374de | 2011-03-24 14:18:02 -0700 | [diff] [blame] | 618 | const char *mime = NULL; |
| 619 | Track::Kind kind = Track::OTHER; |
| 620 | |
| 621 | if (type == FOURCC('v', 'i', 'd', 's')) { |
| 622 | mime = GetMIMETypeForHandler(handler); |
| 623 | |
| 624 | if (mime && strncasecmp(mime, "video/", 6)) { |
| 625 | return ERROR_MALFORMED; |
| 626 | } |
| 627 | |
Andreas Huber | c639aad | 2011-09-21 13:19:54 -0700 | [diff] [blame] | 628 | if (mime == NULL) { |
Steve Block | 5ff1dd5 | 2012-01-05 23:22:43 +0000 | [diff] [blame] | 629 | ALOGW("Unsupported video format '%c%c%c%c'", |
Andreas Huber | c639aad | 2011-09-21 13:19:54 -0700 | [diff] [blame] | 630 | (char)(handler >> 24), |
| 631 | (char)((handler >> 16) & 0xff), |
| 632 | (char)((handler >> 8) & 0xff), |
| 633 | (char)(handler & 0xff)); |
| 634 | } |
| 635 | |
Andreas Huber | f8374de | 2011-03-24 14:18:02 -0700 | [diff] [blame] | 636 | kind = Track::VIDEO; |
| 637 | } else if (type == FOURCC('a', 'u', 'd', 's')) { |
| 638 | if (mime && strncasecmp(mime, "audio/", 6)) { |
| 639 | return ERROR_MALFORMED; |
| 640 | } |
| 641 | |
| 642 | kind = Track::AUDIO; |
| 643 | } |
| 644 | |
| 645 | if (!mime) { |
| 646 | mime = "application/octet-stream"; |
| 647 | } |
| 648 | |
| 649 | meta->setCString(kKeyMIMEType, mime); |
| 650 | |
| 651 | mTracks.push(); |
| 652 | Track *track = &mTracks.editItemAt(mTracks.size() - 1); |
| 653 | |
| 654 | track->mMeta = meta; |
| 655 | track->mRate = rate; |
| 656 | track->mScale = scale; |
Andreas Huber | 7de73f4 | 2011-09-13 11:12:57 -0700 | [diff] [blame] | 657 | track->mBytesPerSample = sampleSize; |
Andreas Huber | f8374de | 2011-03-24 14:18:02 -0700 | [diff] [blame] | 658 | track->mKind = kind; |
| 659 | track->mNumSyncSamples = 0; |
| 660 | track->mThumbnailSampleSize = 0; |
| 661 | track->mThumbnailSampleIndex = -1; |
| 662 | track->mMaxSampleSize = 0; |
Andreas Huber | 32e1832 | 2011-09-23 14:05:49 -0700 | [diff] [blame] | 663 | track->mAvgChunkSize = 1.0; |
| 664 | track->mFirstChunkSize = 0; |
Andreas Huber | f8374de | 2011-03-24 14:18:02 -0700 | [diff] [blame] | 665 | |
| 666 | return OK; |
| 667 | } |
| 668 | |
| 669 | status_t AVIExtractor::parseStreamFormat(off64_t offset, size_t size) { |
| 670 | if (mTracks.isEmpty()) { |
| 671 | return ERROR_MALFORMED; |
| 672 | } |
| 673 | |
| 674 | Track *track = &mTracks.editItemAt(mTracks.size() - 1); |
| 675 | |
| 676 | if (track->mKind == Track::OTHER) { |
| 677 | // We don't support this content, but that's not a parsing error. |
| 678 | return OK; |
| 679 | } |
| 680 | |
| 681 | bool isVideo = (track->mKind == Track::VIDEO); |
| 682 | |
Andreas Huber | 32e1832 | 2011-09-23 14:05:49 -0700 | [diff] [blame] | 683 | if ((isVideo && size < 40) || (!isVideo && size < 16)) { |
| 684 | // Expected a BITMAPINFO or WAVEFORMAT(EX) structure, respectively. |
Andreas Huber | f8374de | 2011-03-24 14:18:02 -0700 | [diff] [blame] | 685 | return ERROR_MALFORMED; |
| 686 | } |
| 687 | |
| 688 | sp<ABuffer> buffer = new ABuffer(size); |
| 689 | ssize_t n = mDataSource->readAt(offset, buffer->data(), buffer->size()); |
| 690 | |
| 691 | if (n < (ssize_t)size) { |
| 692 | return n < 0 ? (status_t)n : ERROR_MALFORMED; |
| 693 | } |
| 694 | |
| 695 | const uint8_t *data = buffer->data(); |
| 696 | |
| 697 | if (isVideo) { |
| 698 | uint32_t width = U32LE_AT(&data[4]); |
| 699 | uint32_t height = U32LE_AT(&data[8]); |
| 700 | |
| 701 | track->mMeta->setInt32(kKeyWidth, width); |
| 702 | track->mMeta->setInt32(kKeyHeight, height); |
| 703 | } else { |
| 704 | uint32_t format = U16LE_AT(data); |
Andreas Huber | c639aad | 2011-09-21 13:19:54 -0700 | [diff] [blame] | 705 | |
Andreas Huber | f8374de | 2011-03-24 14:18:02 -0700 | [diff] [blame] | 706 | if (format == 0x55) { |
| 707 | track->mMeta->setCString(kKeyMIMEType, MEDIA_MIMETYPE_AUDIO_MPEG); |
Andreas Huber | c639aad | 2011-09-21 13:19:54 -0700 | [diff] [blame] | 708 | } else { |
Steve Block | 5ff1dd5 | 2012-01-05 23:22:43 +0000 | [diff] [blame] | 709 | ALOGW("Unsupported audio format = 0x%04x", format); |
Andreas Huber | f8374de | 2011-03-24 14:18:02 -0700 | [diff] [blame] | 710 | } |
| 711 | |
| 712 | uint32_t numChannels = U16LE_AT(&data[2]); |
| 713 | uint32_t sampleRate = U32LE_AT(&data[4]); |
| 714 | |
| 715 | track->mMeta->setInt32(kKeyChannelCount, numChannels); |
| 716 | track->mMeta->setInt32(kKeySampleRate, sampleRate); |
| 717 | } |
| 718 | |
| 719 | return OK; |
| 720 | } |
| 721 | |
| 722 | // static |
| 723 | bool AVIExtractor::IsCorrectChunkType( |
| 724 | ssize_t trackIndex, Track::Kind kind, uint32_t chunkType) { |
| 725 | uint32_t chunkBase = chunkType & 0xffff; |
| 726 | |
| 727 | switch (kind) { |
| 728 | case Track::VIDEO: |
| 729 | { |
| 730 | if (chunkBase != FOURCC(0, 0, 'd', 'c') |
| 731 | && chunkBase != FOURCC(0, 0, 'd', 'b')) { |
| 732 | return false; |
| 733 | } |
| 734 | break; |
| 735 | } |
| 736 | |
| 737 | case Track::AUDIO: |
| 738 | { |
| 739 | if (chunkBase != FOURCC(0, 0, 'w', 'b')) { |
| 740 | return false; |
| 741 | } |
| 742 | break; |
| 743 | } |
| 744 | |
| 745 | default: |
| 746 | break; |
| 747 | } |
| 748 | |
| 749 | if (trackIndex < 0) { |
| 750 | return true; |
| 751 | } |
| 752 | |
| 753 | uint8_t hi = chunkType >> 24; |
| 754 | uint8_t lo = (chunkType >> 16) & 0xff; |
| 755 | |
| 756 | if (hi < '0' || hi > '9' || lo < '0' || lo > '9') { |
| 757 | return false; |
| 758 | } |
| 759 | |
| 760 | if (trackIndex != (10 * (hi - '0') + (lo - '0'))) { |
| 761 | return false; |
| 762 | } |
| 763 | |
| 764 | return true; |
| 765 | } |
| 766 | |
| 767 | status_t AVIExtractor::parseIndex(off64_t offset, size_t size) { |
| 768 | if ((size % 16) != 0) { |
| 769 | return ERROR_MALFORMED; |
| 770 | } |
| 771 | |
| 772 | sp<ABuffer> buffer = new ABuffer(size); |
| 773 | ssize_t n = mDataSource->readAt(offset, buffer->data(), buffer->size()); |
| 774 | |
| 775 | if (n < (ssize_t)size) { |
| 776 | return n < 0 ? (status_t)n : ERROR_MALFORMED; |
| 777 | } |
| 778 | |
| 779 | const uint8_t *data = buffer->data(); |
| 780 | |
| 781 | while (size > 0) { |
| 782 | uint32_t chunkType = U32_AT(data); |
| 783 | |
| 784 | uint8_t hi = chunkType >> 24; |
| 785 | uint8_t lo = (chunkType >> 16) & 0xff; |
| 786 | |
| 787 | if (hi < '0' || hi > '9' || lo < '0' || lo > '9') { |
| 788 | return ERROR_MALFORMED; |
| 789 | } |
| 790 | |
| 791 | size_t trackIndex = 10 * (hi - '0') + (lo - '0'); |
| 792 | |
| 793 | if (trackIndex >= mTracks.size()) { |
| 794 | return ERROR_MALFORMED; |
| 795 | } |
| 796 | |
| 797 | Track *track = &mTracks.editItemAt(trackIndex); |
| 798 | |
| 799 | if (!IsCorrectChunkType(-1, track->mKind, chunkType)) { |
| 800 | return ERROR_MALFORMED; |
| 801 | } |
| 802 | |
| 803 | if (track->mKind == Track::OTHER) { |
| 804 | data += 16; |
| 805 | size -= 16; |
| 806 | continue; |
| 807 | } |
| 808 | |
| 809 | uint32_t flags = U32LE_AT(&data[4]); |
| 810 | uint32_t offset = U32LE_AT(&data[8]); |
| 811 | uint32_t chunkSize = U32LE_AT(&data[12]); |
| 812 | |
| 813 | if (chunkSize > track->mMaxSampleSize) { |
| 814 | track->mMaxSampleSize = chunkSize; |
| 815 | } |
| 816 | |
| 817 | track->mSamples.push(); |
| 818 | |
| 819 | SampleInfo *info = |
| 820 | &track->mSamples.editItemAt(track->mSamples.size() - 1); |
| 821 | |
| 822 | info->mOffset = offset; |
| 823 | info->mIsKey = (flags & 0x10) != 0; |
| 824 | |
| 825 | if (info->mIsKey) { |
| 826 | static const size_t kMaxNumSyncSamplesToScan = 20; |
| 827 | |
| 828 | if (track->mNumSyncSamples < kMaxNumSyncSamplesToScan) { |
| 829 | if (chunkSize > track->mThumbnailSampleSize) { |
| 830 | track->mThumbnailSampleSize = chunkSize; |
| 831 | |
| 832 | track->mThumbnailSampleIndex = |
| 833 | track->mSamples.size() - 1; |
| 834 | } |
| 835 | } |
| 836 | |
| 837 | ++track->mNumSyncSamples; |
| 838 | } |
| 839 | |
| 840 | data += 16; |
| 841 | size -= 16; |
| 842 | } |
| 843 | |
| 844 | if (!mTracks.isEmpty()) { |
| 845 | off64_t offset; |
| 846 | size_t size; |
| 847 | bool isKey; |
Andreas Huber | 7de73f4 | 2011-09-13 11:12:57 -0700 | [diff] [blame] | 848 | int64_t timeUs; |
| 849 | status_t err = getSampleInfo(0, 0, &offset, &size, &isKey, &timeUs); |
Andreas Huber | f8374de | 2011-03-24 14:18:02 -0700 | [diff] [blame] | 850 | |
| 851 | if (err != OK) { |
| 852 | mOffsetsAreAbsolute = !mOffsetsAreAbsolute; |
Andreas Huber | 7de73f4 | 2011-09-13 11:12:57 -0700 | [diff] [blame] | 853 | err = getSampleInfo(0, 0, &offset, &size, &isKey, &timeUs); |
Andreas Huber | f8374de | 2011-03-24 14:18:02 -0700 | [diff] [blame] | 854 | |
| 855 | if (err != OK) { |
| 856 | return err; |
| 857 | } |
| 858 | } |
| 859 | |
Steve Block | 3856b09 | 2011-10-20 11:56:00 +0100 | [diff] [blame] | 860 | ALOGV("Chunk offsets are %s", |
Andreas Huber | f8374de | 2011-03-24 14:18:02 -0700 | [diff] [blame] | 861 | mOffsetsAreAbsolute ? "absolute" : "movie-chunk relative"); |
| 862 | } |
| 863 | |
| 864 | for (size_t i = 0; i < mTracks.size(); ++i) { |
| 865 | Track *track = &mTracks.editItemAt(i); |
| 866 | |
Andreas Huber | 32e1832 | 2011-09-23 14:05:49 -0700 | [diff] [blame] | 867 | if (track->mBytesPerSample > 0) { |
| 868 | // Assume all chunks are roughly the same size for now. |
| 869 | |
| 870 | // Compute the avg. size of the first 128 chunks (if there are |
| 871 | // that many), but exclude the size of the first one, since |
| 872 | // it may be an outlier. |
| 873 | size_t numSamplesToAverage = track->mSamples.size(); |
| 874 | if (numSamplesToAverage > 256) { |
| 875 | numSamplesToAverage = 256; |
| 876 | } |
| 877 | |
| 878 | double avgChunkSize = 0; |
| 879 | size_t j; |
| 880 | for (j = 0; j <= numSamplesToAverage; ++j) { |
| 881 | off64_t offset; |
| 882 | size_t size; |
| 883 | bool isKey; |
| 884 | int64_t dummy; |
| 885 | |
| 886 | status_t err = |
| 887 | getSampleInfo( |
| 888 | i, j, |
| 889 | &offset, &size, &isKey, &dummy); |
| 890 | |
| 891 | if (err != OK) { |
| 892 | return err; |
| 893 | } |
| 894 | |
| 895 | if (j == 0) { |
| 896 | track->mFirstChunkSize = size; |
| 897 | continue; |
| 898 | } |
| 899 | |
| 900 | avgChunkSize += size; |
| 901 | } |
| 902 | |
| 903 | avgChunkSize /= numSamplesToAverage; |
| 904 | |
| 905 | track->mAvgChunkSize = avgChunkSize; |
| 906 | } |
| 907 | |
Andreas Huber | 7de73f4 | 2011-09-13 11:12:57 -0700 | [diff] [blame] | 908 | int64_t durationUs; |
| 909 | CHECK_EQ((status_t)OK, |
| 910 | getSampleTime(i, track->mSamples.size() - 1, &durationUs)); |
Andreas Huber | f8374de | 2011-03-24 14:18:02 -0700 | [diff] [blame] | 911 | |
Steve Block | 3856b09 | 2011-10-20 11:56:00 +0100 | [diff] [blame] | 912 | ALOGV("track %d duration = %.2f secs", i, durationUs / 1E6); |
Andreas Huber | f8374de | 2011-03-24 14:18:02 -0700 | [diff] [blame] | 913 | |
| 914 | track->mMeta->setInt64(kKeyDuration, durationUs); |
| 915 | track->mMeta->setInt32(kKeyMaxInputSize, track->mMaxSampleSize); |
| 916 | |
| 917 | const char *tmp; |
| 918 | CHECK(track->mMeta->findCString(kKeyMIMEType, &tmp)); |
| 919 | |
| 920 | AString mime = tmp; |
| 921 | |
Andreas Huber | c639aad | 2011-09-21 13:19:54 -0700 | [diff] [blame] | 922 | if (!strncasecmp("video/", mime.c_str(), 6)) { |
| 923 | if (track->mThumbnailSampleIndex >= 0) { |
| 924 | int64_t thumbnailTimeUs; |
| 925 | CHECK_EQ((status_t)OK, |
| 926 | getSampleTime(i, track->mThumbnailSampleIndex, |
| 927 | &thumbnailTimeUs)); |
Andreas Huber | f8374de | 2011-03-24 14:18:02 -0700 | [diff] [blame] | 928 | |
Andreas Huber | c639aad | 2011-09-21 13:19:54 -0700 | [diff] [blame] | 929 | track->mMeta->setInt64(kKeyThumbnailTime, thumbnailTimeUs); |
| 930 | } |
| 931 | |
| 932 | status_t err = OK; |
Andreas Huber | f8374de | 2011-03-24 14:18:02 -0700 | [diff] [blame] | 933 | |
| 934 | if (!strcasecmp(mime.c_str(), MEDIA_MIMETYPE_VIDEO_MPEG4)) { |
Andreas Huber | c639aad | 2011-09-21 13:19:54 -0700 | [diff] [blame] | 935 | err = addMPEG4CodecSpecificData(i); |
| 936 | } else if (!strcasecmp(mime.c_str(), MEDIA_MIMETYPE_VIDEO_AVC)) { |
| 937 | err = addH264CodecSpecificData(i); |
| 938 | } |
Andreas Huber | f8374de | 2011-03-24 14:18:02 -0700 | [diff] [blame] | 939 | |
Andreas Huber | c639aad | 2011-09-21 13:19:54 -0700 | [diff] [blame] | 940 | if (err != OK) { |
| 941 | return err; |
Andreas Huber | f8374de | 2011-03-24 14:18:02 -0700 | [diff] [blame] | 942 | } |
| 943 | } |
| 944 | } |
| 945 | |
| 946 | mFoundIndex = true; |
| 947 | |
| 948 | return OK; |
| 949 | } |
| 950 | |
| 951 | static size_t GetSizeWidth(size_t x) { |
| 952 | size_t n = 1; |
| 953 | while (x > 127) { |
| 954 | ++n; |
| 955 | x >>= 7; |
| 956 | } |
| 957 | return n; |
| 958 | } |
| 959 | |
| 960 | static uint8_t *EncodeSize(uint8_t *dst, size_t x) { |
| 961 | while (x > 127) { |
| 962 | *dst++ = (x & 0x7f) | 0x80; |
| 963 | x >>= 7; |
| 964 | } |
| 965 | *dst++ = x; |
| 966 | return dst; |
| 967 | } |
| 968 | |
| 969 | sp<ABuffer> MakeMPEG4VideoCodecSpecificData(const sp<ABuffer> &config) { |
| 970 | size_t len1 = config->size() + GetSizeWidth(config->size()) + 1; |
| 971 | size_t len2 = len1 + GetSizeWidth(len1) + 1 + 13; |
| 972 | size_t len3 = len2 + GetSizeWidth(len2) + 1 + 3; |
| 973 | |
| 974 | sp<ABuffer> csd = new ABuffer(len3); |
| 975 | uint8_t *dst = csd->data(); |
| 976 | *dst++ = 0x03; |
| 977 | dst = EncodeSize(dst, len2 + 3); |
| 978 | *dst++ = 0x00; // ES_ID |
| 979 | *dst++ = 0x00; |
| 980 | *dst++ = 0x00; // streamDependenceFlag, URL_Flag, OCRstreamFlag |
| 981 | |
| 982 | *dst++ = 0x04; |
| 983 | dst = EncodeSize(dst, len1 + 13); |
| 984 | *dst++ = 0x01; // Video ISO/IEC 14496-2 Simple Profile |
| 985 | for (size_t i = 0; i < 12; ++i) { |
| 986 | *dst++ = 0x00; |
| 987 | } |
| 988 | |
| 989 | *dst++ = 0x05; |
| 990 | dst = EncodeSize(dst, config->size()); |
| 991 | memcpy(dst, config->data(), config->size()); |
| 992 | dst += config->size(); |
| 993 | |
| 994 | // hexdump(csd->data(), csd->size()); |
| 995 | |
| 996 | return csd; |
| 997 | } |
| 998 | |
| 999 | status_t AVIExtractor::addMPEG4CodecSpecificData(size_t trackIndex) { |
| 1000 | Track *track = &mTracks.editItemAt(trackIndex); |
| 1001 | |
| 1002 | off64_t offset; |
| 1003 | size_t size; |
| 1004 | bool isKey; |
Andreas Huber | 7de73f4 | 2011-09-13 11:12:57 -0700 | [diff] [blame] | 1005 | int64_t timeUs; |
| 1006 | status_t err = |
| 1007 | getSampleInfo(trackIndex, 0, &offset, &size, &isKey, &timeUs); |
Andreas Huber | f8374de | 2011-03-24 14:18:02 -0700 | [diff] [blame] | 1008 | |
| 1009 | if (err != OK) { |
| 1010 | return err; |
| 1011 | } |
| 1012 | |
| 1013 | sp<ABuffer> buffer = new ABuffer(size); |
| 1014 | ssize_t n = mDataSource->readAt(offset, buffer->data(), buffer->size()); |
| 1015 | |
| 1016 | if (n < (ssize_t)size) { |
| 1017 | return n < 0 ? (status_t)n : ERROR_MALFORMED; |
| 1018 | } |
| 1019 | |
| 1020 | // Extract everything up to the first VOP start code from the first |
| 1021 | // frame's encoded data and use it to construct an ESDS with the |
| 1022 | // codec specific data. |
| 1023 | |
| 1024 | size_t i = 0; |
| 1025 | bool found = false; |
| 1026 | while (i + 3 < buffer->size()) { |
| 1027 | if (!memcmp("\x00\x00\x01\xb6", &buffer->data()[i], 4)) { |
| 1028 | found = true; |
| 1029 | break; |
| 1030 | } |
| 1031 | |
| 1032 | ++i; |
| 1033 | } |
| 1034 | |
| 1035 | if (!found) { |
| 1036 | return ERROR_MALFORMED; |
| 1037 | } |
| 1038 | |
| 1039 | buffer->setRange(0, i); |
| 1040 | |
| 1041 | sp<ABuffer> csd = MakeMPEG4VideoCodecSpecificData(buffer); |
| 1042 | track->mMeta->setData(kKeyESDS, kTypeESDS, csd->data(), csd->size()); |
| 1043 | |
| 1044 | return OK; |
| 1045 | } |
| 1046 | |
Andreas Huber | c639aad | 2011-09-21 13:19:54 -0700 | [diff] [blame] | 1047 | status_t AVIExtractor::addH264CodecSpecificData(size_t trackIndex) { |
| 1048 | Track *track = &mTracks.editItemAt(trackIndex); |
| 1049 | |
| 1050 | off64_t offset; |
| 1051 | size_t size; |
| 1052 | bool isKey; |
| 1053 | int64_t timeUs; |
| 1054 | |
| 1055 | // Extract codec specific data from the first non-empty sample. |
| 1056 | |
| 1057 | size_t sampleIndex = 0; |
| 1058 | for (;;) { |
| 1059 | status_t err = |
| 1060 | getSampleInfo( |
| 1061 | trackIndex, sampleIndex, &offset, &size, &isKey, &timeUs); |
| 1062 | |
| 1063 | if (err != OK) { |
| 1064 | return err; |
| 1065 | } |
| 1066 | |
| 1067 | if (size > 0) { |
| 1068 | break; |
| 1069 | } |
| 1070 | |
| 1071 | ++sampleIndex; |
| 1072 | } |
| 1073 | |
| 1074 | sp<ABuffer> buffer = new ABuffer(size); |
| 1075 | ssize_t n = mDataSource->readAt(offset, buffer->data(), buffer->size()); |
| 1076 | |
| 1077 | if (n < (ssize_t)size) { |
| 1078 | return n < 0 ? (status_t)n : ERROR_MALFORMED; |
| 1079 | } |
| 1080 | |
| 1081 | sp<MetaData> meta = MakeAVCCodecSpecificData(buffer); |
| 1082 | |
| 1083 | if (meta == NULL) { |
Steve Block | 29357bc | 2012-01-06 19:20:56 +0000 | [diff] [blame] | 1084 | ALOGE("Unable to extract AVC codec specific data"); |
Andreas Huber | c639aad | 2011-09-21 13:19:54 -0700 | [diff] [blame] | 1085 | return ERROR_MALFORMED; |
| 1086 | } |
| 1087 | |
| 1088 | int32_t width, height; |
| 1089 | CHECK(meta->findInt32(kKeyWidth, &width)); |
| 1090 | CHECK(meta->findInt32(kKeyHeight, &height)); |
| 1091 | |
| 1092 | uint32_t type; |
| 1093 | const void *csd; |
| 1094 | size_t csdSize; |
| 1095 | CHECK(meta->findData(kKeyAVCC, &type, &csd, &csdSize)); |
| 1096 | |
| 1097 | track->mMeta->setInt32(kKeyWidth, width); |
Andreas Huber | 4fe1c6c | 2011-12-01 10:02:37 -0800 | [diff] [blame] | 1098 | track->mMeta->setInt32(kKeyHeight, height); |
Andreas Huber | c639aad | 2011-09-21 13:19:54 -0700 | [diff] [blame] | 1099 | track->mMeta->setData(kKeyAVCC, type, csd, csdSize); |
| 1100 | |
| 1101 | return OK; |
| 1102 | } |
| 1103 | |
Andreas Huber | f8374de | 2011-03-24 14:18:02 -0700 | [diff] [blame] | 1104 | status_t AVIExtractor::getSampleInfo( |
| 1105 | size_t trackIndex, size_t sampleIndex, |
Andreas Huber | 7de73f4 | 2011-09-13 11:12:57 -0700 | [diff] [blame] | 1106 | off64_t *offset, size_t *size, bool *isKey, |
| 1107 | int64_t *sampleTimeUs) { |
Andreas Huber | f8374de | 2011-03-24 14:18:02 -0700 | [diff] [blame] | 1108 | if (trackIndex >= mTracks.size()) { |
| 1109 | return -ERANGE; |
| 1110 | } |
| 1111 | |
| 1112 | const Track &track = mTracks.itemAt(trackIndex); |
| 1113 | |
| 1114 | if (sampleIndex >= track.mSamples.size()) { |
| 1115 | return -ERANGE; |
| 1116 | } |
| 1117 | |
| 1118 | const SampleInfo &info = track.mSamples.itemAt(sampleIndex); |
| 1119 | |
| 1120 | if (!mOffsetsAreAbsolute) { |
| 1121 | *offset = info.mOffset + mMovieOffset + 8; |
| 1122 | } else { |
| 1123 | *offset = info.mOffset; |
| 1124 | } |
| 1125 | |
| 1126 | *size = 0; |
| 1127 | |
| 1128 | uint8_t tmp[8]; |
| 1129 | ssize_t n = mDataSource->readAt(*offset, tmp, 8); |
| 1130 | |
| 1131 | if (n < 8) { |
| 1132 | return n < 0 ? (status_t)n : (status_t)ERROR_MALFORMED; |
| 1133 | } |
| 1134 | |
| 1135 | uint32_t chunkType = U32_AT(tmp); |
| 1136 | |
| 1137 | if (!IsCorrectChunkType(trackIndex, track.mKind, chunkType)) { |
| 1138 | return ERROR_MALFORMED; |
| 1139 | } |
| 1140 | |
| 1141 | *offset += 8; |
| 1142 | *size = U32LE_AT(&tmp[4]); |
| 1143 | |
| 1144 | *isKey = info.mIsKey; |
| 1145 | |
Andreas Huber | 32e1832 | 2011-09-23 14:05:49 -0700 | [diff] [blame] | 1146 | if (track.mBytesPerSample > 0) { |
| 1147 | size_t sampleStartInBytes; |
| 1148 | if (sampleIndex == 0) { |
| 1149 | sampleStartInBytes = 0; |
| 1150 | } else { |
| 1151 | sampleStartInBytes = |
| 1152 | track.mFirstChunkSize + track.mAvgChunkSize * (sampleIndex - 1); |
| 1153 | } |
| 1154 | |
| 1155 | sampleIndex = sampleStartInBytes / track.mBytesPerSample; |
| 1156 | } |
| 1157 | |
Andreas Huber | 7de73f4 | 2011-09-13 11:12:57 -0700 | [diff] [blame] | 1158 | *sampleTimeUs = (sampleIndex * 1000000ll * track.mRate) / track.mScale; |
| 1159 | |
Andreas Huber | f8374de | 2011-03-24 14:18:02 -0700 | [diff] [blame] | 1160 | return OK; |
| 1161 | } |
| 1162 | |
Andreas Huber | 7de73f4 | 2011-09-13 11:12:57 -0700 | [diff] [blame] | 1163 | status_t AVIExtractor::getSampleTime( |
| 1164 | size_t trackIndex, size_t sampleIndex, int64_t *sampleTimeUs) { |
| 1165 | off64_t offset; |
| 1166 | size_t size; |
| 1167 | bool isKey; |
| 1168 | return getSampleInfo( |
| 1169 | trackIndex, sampleIndex, &offset, &size, &isKey, sampleTimeUs); |
| 1170 | } |
| 1171 | |
Andreas Huber | f8374de | 2011-03-24 14:18:02 -0700 | [diff] [blame] | 1172 | status_t AVIExtractor::getSampleIndexAtTime( |
| 1173 | size_t trackIndex, |
| 1174 | int64_t timeUs, MediaSource::ReadOptions::SeekMode mode, |
| 1175 | size_t *sampleIndex) const { |
| 1176 | if (trackIndex >= mTracks.size()) { |
| 1177 | return -ERANGE; |
| 1178 | } |
| 1179 | |
| 1180 | const Track &track = mTracks.itemAt(trackIndex); |
| 1181 | |
Andreas Huber | 32e1832 | 2011-09-23 14:05:49 -0700 | [diff] [blame] | 1182 | ssize_t closestSampleIndex; |
| 1183 | |
| 1184 | if (track.mBytesPerSample > 0) { |
| 1185 | size_t closestByteOffset = |
| 1186 | (timeUs * track.mBytesPerSample) |
| 1187 | / track.mRate * track.mScale / 1000000ll; |
| 1188 | |
| 1189 | if (closestByteOffset <= track.mFirstChunkSize) { |
| 1190 | closestSampleIndex = 0; |
| 1191 | } else { |
| 1192 | closestSampleIndex = |
| 1193 | (closestByteOffset - track.mFirstChunkSize) |
| 1194 | / track.mAvgChunkSize; |
| 1195 | } |
| 1196 | } else { |
| 1197 | // Each chunk contains a single sample. |
| 1198 | closestSampleIndex = timeUs / track.mRate * track.mScale / 1000000ll; |
| 1199 | } |
Andreas Huber | f8374de | 2011-03-24 14:18:02 -0700 | [diff] [blame] | 1200 | |
| 1201 | ssize_t numSamples = track.mSamples.size(); |
| 1202 | |
| 1203 | if (closestSampleIndex < 0) { |
| 1204 | closestSampleIndex = 0; |
| 1205 | } else if (closestSampleIndex >= numSamples) { |
| 1206 | closestSampleIndex = numSamples - 1; |
| 1207 | } |
| 1208 | |
| 1209 | if (mode == MediaSource::ReadOptions::SEEK_CLOSEST) { |
| 1210 | *sampleIndex = closestSampleIndex; |
| 1211 | |
| 1212 | return OK; |
| 1213 | } |
| 1214 | |
| 1215 | ssize_t prevSyncSampleIndex = closestSampleIndex; |
| 1216 | while (prevSyncSampleIndex >= 0) { |
| 1217 | const SampleInfo &info = |
| 1218 | track.mSamples.itemAt(prevSyncSampleIndex); |
| 1219 | |
| 1220 | if (info.mIsKey) { |
| 1221 | break; |
| 1222 | } |
| 1223 | |
| 1224 | --prevSyncSampleIndex; |
| 1225 | } |
| 1226 | |
| 1227 | ssize_t nextSyncSampleIndex = closestSampleIndex; |
| 1228 | while (nextSyncSampleIndex < numSamples) { |
| 1229 | const SampleInfo &info = |
| 1230 | track.mSamples.itemAt(nextSyncSampleIndex); |
| 1231 | |
| 1232 | if (info.mIsKey) { |
| 1233 | break; |
| 1234 | } |
| 1235 | |
| 1236 | ++nextSyncSampleIndex; |
| 1237 | } |
| 1238 | |
| 1239 | switch (mode) { |
| 1240 | case MediaSource::ReadOptions::SEEK_PREVIOUS_SYNC: |
| 1241 | { |
| 1242 | *sampleIndex = prevSyncSampleIndex; |
| 1243 | |
| 1244 | return prevSyncSampleIndex >= 0 ? OK : UNKNOWN_ERROR; |
| 1245 | } |
| 1246 | |
| 1247 | case MediaSource::ReadOptions::SEEK_NEXT_SYNC: |
| 1248 | { |
| 1249 | *sampleIndex = nextSyncSampleIndex; |
| 1250 | |
| 1251 | return nextSyncSampleIndex < numSamples ? OK : UNKNOWN_ERROR; |
| 1252 | } |
| 1253 | |
| 1254 | case MediaSource::ReadOptions::SEEK_CLOSEST_SYNC: |
| 1255 | { |
| 1256 | if (prevSyncSampleIndex < 0 && nextSyncSampleIndex >= numSamples) { |
| 1257 | return UNKNOWN_ERROR; |
| 1258 | } |
| 1259 | |
| 1260 | if (prevSyncSampleIndex < 0) { |
| 1261 | *sampleIndex = nextSyncSampleIndex; |
| 1262 | return OK; |
| 1263 | } |
| 1264 | |
| 1265 | if (nextSyncSampleIndex >= numSamples) { |
| 1266 | *sampleIndex = prevSyncSampleIndex; |
| 1267 | return OK; |
| 1268 | } |
| 1269 | |
| 1270 | size_t dist1 = closestSampleIndex - prevSyncSampleIndex; |
| 1271 | size_t dist2 = nextSyncSampleIndex - closestSampleIndex; |
| 1272 | |
| 1273 | *sampleIndex = |
| 1274 | (dist1 < dist2) ? prevSyncSampleIndex : nextSyncSampleIndex; |
| 1275 | |
| 1276 | return OK; |
| 1277 | } |
| 1278 | |
| 1279 | default: |
| 1280 | TRESPASS(); |
| 1281 | break; |
| 1282 | } |
| 1283 | } |
| 1284 | |
| 1285 | bool SniffAVI( |
| 1286 | const sp<DataSource> &source, String8 *mimeType, float *confidence, |
| 1287 | sp<AMessage> *) { |
| 1288 | char tmp[12]; |
| 1289 | if (source->readAt(0, tmp, 12) < 12) { |
| 1290 | return false; |
| 1291 | } |
| 1292 | |
| 1293 | if (!memcmp(tmp, "RIFF", 4) && !memcmp(&tmp[8], "AVI ", 4)) { |
| 1294 | mimeType->setTo(MEDIA_MIMETYPE_CONTAINER_AVI); |
Andreas Huber | c6c4572 | 2011-09-12 13:49:00 -0700 | [diff] [blame] | 1295 | |
| 1296 | // Just a tad over the mp3 extractor's confidence, since |
| 1297 | // these .avi files may contain .mp3 content that otherwise would |
| 1298 | // mistakenly lead to us identifying the entire file as a .mp3 file. |
| 1299 | *confidence = 0.21; |
Andreas Huber | f8374de | 2011-03-24 14:18:02 -0700 | [diff] [blame] | 1300 | |
| 1301 | return true; |
| 1302 | } |
| 1303 | |
| 1304 | return false; |
| 1305 | } |
| 1306 | |
| 1307 | } // namespace android |