Andreas Huber | b559084 | 2010-12-03 16:12:25 -0800 | [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 "LiveSession" |
| 19 | #include <utils/Log.h> |
| 20 | |
| 21 | #include "include/LiveSession.h" |
| 22 | |
| 23 | #include "LiveDataSource.h" |
| 24 | |
| 25 | #include "include/M3UParser.h" |
| 26 | #include "include/NuHTTPDataSource.h" |
| 27 | |
| 28 | #include <cutils/properties.h> |
| 29 | #include <media/stagefright/foundation/hexdump.h> |
| 30 | #include <media/stagefright/foundation/ABuffer.h> |
| 31 | #include <media/stagefright/foundation/ADebug.h> |
| 32 | #include <media/stagefright/foundation/AMessage.h> |
| 33 | #include <media/stagefright/DataSource.h> |
| 34 | #include <media/stagefright/FileSource.h> |
| 35 | #include <media/stagefright/MediaErrors.h> |
| 36 | |
| 37 | #include <ctype.h> |
| 38 | #include <openssl/aes.h> |
| 39 | |
| 40 | namespace android { |
| 41 | |
| 42 | const int64_t LiveSession::kMaxPlaylistAgeUs = 15000000ll; |
| 43 | |
Andreas Huber | 53182c4 | 2011-02-24 14:42:48 -0800 | [diff] [blame] | 44 | LiveSession::LiveSession(uint32_t flags) |
| 45 | : mFlags(flags), |
| 46 | mDataSource(new LiveDataSource), |
| 47 | mHTTPDataSource( |
| 48 | new NuHTTPDataSource( |
| 49 | (mFlags & kFlagIncognito) |
| 50 | ? NuHTTPDataSource::kFlagIncognito |
| 51 | : 0)), |
Andreas Huber | b559084 | 2010-12-03 16:12:25 -0800 | [diff] [blame] | 52 | mPrevBandwidthIndex(-1), |
| 53 | mLastPlaylistFetchTimeUs(-1), |
| 54 | mSeqNumber(-1), |
| 55 | mSeekTimeUs(-1), |
| 56 | mNumRetries(0), |
| 57 | mDurationUs(-1), |
| 58 | mSeekDone(false), |
Andreas Huber | 17ab86c | 2011-01-31 16:18:49 -0800 | [diff] [blame] | 59 | mDisconnectPending(false), |
Andreas Huber | b559084 | 2010-12-03 16:12:25 -0800 | [diff] [blame] | 60 | mMonitorQueueGeneration(0) { |
| 61 | } |
| 62 | |
| 63 | LiveSession::~LiveSession() { |
| 64 | } |
| 65 | |
| 66 | sp<DataSource> LiveSession::getDataSource() { |
| 67 | return mDataSource; |
| 68 | } |
| 69 | |
| 70 | void LiveSession::connect(const char *url) { |
| 71 | sp<AMessage> msg = new AMessage(kWhatConnect, id()); |
| 72 | msg->setString("url", url); |
| 73 | msg->post(); |
| 74 | } |
| 75 | |
| 76 | void LiveSession::disconnect() { |
Andreas Huber | 17ab86c | 2011-01-31 16:18:49 -0800 | [diff] [blame] | 77 | Mutex::Autolock autoLock(mLock); |
| 78 | mDisconnectPending = true; |
| 79 | |
| 80 | mHTTPDataSource->disconnect(); |
| 81 | |
Andreas Huber | b559084 | 2010-12-03 16:12:25 -0800 | [diff] [blame] | 82 | (new AMessage(kWhatDisconnect, id()))->post(); |
| 83 | } |
| 84 | |
| 85 | void LiveSession::seekTo(int64_t timeUs) { |
| 86 | Mutex::Autolock autoLock(mLock); |
| 87 | mSeekDone = false; |
| 88 | |
| 89 | sp<AMessage> msg = new AMessage(kWhatSeek, id()); |
| 90 | msg->setInt64("timeUs", timeUs); |
| 91 | msg->post(); |
| 92 | |
| 93 | while (!mSeekDone) { |
| 94 | mCondition.wait(mLock); |
| 95 | } |
| 96 | } |
| 97 | |
| 98 | void LiveSession::onMessageReceived(const sp<AMessage> &msg) { |
| 99 | switch (msg->what()) { |
| 100 | case kWhatConnect: |
| 101 | onConnect(msg); |
| 102 | break; |
| 103 | |
| 104 | case kWhatDisconnect: |
| 105 | onDisconnect(); |
| 106 | break; |
| 107 | |
| 108 | case kWhatMonitorQueue: |
| 109 | { |
| 110 | int32_t generation; |
| 111 | CHECK(msg->findInt32("generation", &generation)); |
| 112 | |
| 113 | if (generation != mMonitorQueueGeneration) { |
| 114 | // Stale event |
| 115 | break; |
| 116 | } |
| 117 | |
| 118 | onMonitorQueue(); |
| 119 | break; |
| 120 | } |
| 121 | |
| 122 | case kWhatSeek: |
| 123 | onSeek(msg); |
| 124 | break; |
| 125 | |
| 126 | default: |
| 127 | TRESPASS(); |
| 128 | break; |
| 129 | } |
| 130 | } |
| 131 | |
| 132 | // static |
| 133 | int LiveSession::SortByBandwidth(const BandwidthItem *a, const BandwidthItem *b) { |
| 134 | if (a->mBandwidth < b->mBandwidth) { |
| 135 | return -1; |
| 136 | } else if (a->mBandwidth == b->mBandwidth) { |
| 137 | return 0; |
| 138 | } |
| 139 | |
| 140 | return 1; |
| 141 | } |
| 142 | |
| 143 | void LiveSession::onConnect(const sp<AMessage> &msg) { |
| 144 | AString url; |
| 145 | CHECK(msg->findString("url", &url)); |
| 146 | |
Andreas Huber | 53182c4 | 2011-02-24 14:42:48 -0800 | [diff] [blame] | 147 | if (!(mFlags & kFlagIncognito)) { |
| 148 | LOGI("onConnect '%s'", url.c_str()); |
| 149 | } else { |
| 150 | LOGI("onConnect <URL suppressed>"); |
| 151 | } |
Andreas Huber | b559084 | 2010-12-03 16:12:25 -0800 | [diff] [blame] | 152 | |
| 153 | mMasterURL = url; |
| 154 | |
| 155 | sp<M3UParser> playlist = fetchPlaylist(url.c_str()); |
Andreas Huber | 17ab86c | 2011-01-31 16:18:49 -0800 | [diff] [blame] | 156 | |
| 157 | if (playlist == NULL) { |
| 158 | LOGE("unable to fetch master playlist '%s'.", url.c_str()); |
| 159 | |
| 160 | mDataSource->queueEOS(ERROR_IO); |
| 161 | return; |
| 162 | } |
Andreas Huber | b559084 | 2010-12-03 16:12:25 -0800 | [diff] [blame] | 163 | |
| 164 | if (playlist->isVariantPlaylist()) { |
| 165 | for (size_t i = 0; i < playlist->size(); ++i) { |
| 166 | BandwidthItem item; |
| 167 | |
| 168 | sp<AMessage> meta; |
| 169 | playlist->itemAt(i, &item.mURI, &meta); |
| 170 | |
| 171 | unsigned long bandwidth; |
| 172 | CHECK(meta->findInt32("bandwidth", (int32_t *)&item.mBandwidth)); |
| 173 | |
| 174 | mBandwidthItems.push(item); |
| 175 | } |
| 176 | |
| 177 | CHECK_GT(mBandwidthItems.size(), 0u); |
| 178 | |
| 179 | mBandwidthItems.sort(SortByBandwidth); |
Andreas Huber | b559084 | 2010-12-03 16:12:25 -0800 | [diff] [blame] | 180 | } |
| 181 | |
| 182 | postMonitorQueue(); |
| 183 | } |
| 184 | |
| 185 | void LiveSession::onDisconnect() { |
| 186 | LOGI("onDisconnect"); |
| 187 | |
| 188 | mDataSource->queueEOS(ERROR_END_OF_STREAM); |
Andreas Huber | 17ab86c | 2011-01-31 16:18:49 -0800 | [diff] [blame] | 189 | |
| 190 | Mutex::Autolock autoLock(mLock); |
| 191 | mDisconnectPending = false; |
Andreas Huber | b559084 | 2010-12-03 16:12:25 -0800 | [diff] [blame] | 192 | } |
| 193 | |
| 194 | status_t LiveSession::fetchFile(const char *url, sp<ABuffer> *out) { |
| 195 | *out = NULL; |
| 196 | |
| 197 | sp<DataSource> source; |
| 198 | |
| 199 | if (!strncasecmp(url, "file://", 7)) { |
| 200 | source = new FileSource(url + 7); |
Andreas Huber | 118a150 | 2011-02-17 13:35:08 -0800 | [diff] [blame] | 201 | } else if (strncasecmp(url, "http://", 7) |
| 202 | && strncasecmp(url, "https://", 8)) { |
Andreas Huber | c0bfdb2 | 2010-12-21 14:36:19 -0800 | [diff] [blame] | 203 | return ERROR_UNSUPPORTED; |
Andreas Huber | b559084 | 2010-12-03 16:12:25 -0800 | [diff] [blame] | 204 | } else { |
Andreas Huber | 17ab86c | 2011-01-31 16:18:49 -0800 | [diff] [blame] | 205 | { |
| 206 | Mutex::Autolock autoLock(mLock); |
| 207 | |
| 208 | if (mDisconnectPending) { |
| 209 | return ERROR_IO; |
| 210 | } |
| 211 | } |
| 212 | |
Andreas Huber | b559084 | 2010-12-03 16:12:25 -0800 | [diff] [blame] | 213 | status_t err = mHTTPDataSource->connect(url); |
| 214 | |
| 215 | if (err != OK) { |
| 216 | return err; |
| 217 | } |
| 218 | |
| 219 | source = mHTTPDataSource; |
| 220 | } |
| 221 | |
| 222 | off64_t size; |
| 223 | status_t err = source->getSize(&size); |
| 224 | |
| 225 | if (err != OK) { |
| 226 | size = 65536; |
| 227 | } |
| 228 | |
| 229 | sp<ABuffer> buffer = new ABuffer(size); |
| 230 | buffer->setRange(0, 0); |
| 231 | |
| 232 | for (;;) { |
| 233 | size_t bufferRemaining = buffer->capacity() - buffer->size(); |
| 234 | |
| 235 | if (bufferRemaining == 0) { |
| 236 | bufferRemaining = 32768; |
| 237 | |
| 238 | LOGV("increasing download buffer to %d bytes", |
| 239 | buffer->size() + bufferRemaining); |
| 240 | |
| 241 | sp<ABuffer> copy = new ABuffer(buffer->size() + bufferRemaining); |
| 242 | memcpy(copy->data(), buffer->data(), buffer->size()); |
| 243 | copy->setRange(0, buffer->size()); |
| 244 | |
| 245 | buffer = copy; |
| 246 | } |
| 247 | |
| 248 | ssize_t n = source->readAt( |
| 249 | buffer->size(), buffer->data() + buffer->size(), |
| 250 | bufferRemaining); |
| 251 | |
| 252 | if (n < 0) { |
Andreas Huber | 24b3a4c | 2011-01-06 17:32:00 -0800 | [diff] [blame] | 253 | return n; |
Andreas Huber | b559084 | 2010-12-03 16:12:25 -0800 | [diff] [blame] | 254 | } |
| 255 | |
| 256 | if (n == 0) { |
| 257 | break; |
| 258 | } |
| 259 | |
| 260 | buffer->setRange(0, buffer->size() + (size_t)n); |
| 261 | } |
| 262 | |
| 263 | *out = buffer; |
| 264 | |
| 265 | return OK; |
| 266 | } |
| 267 | |
| 268 | sp<M3UParser> LiveSession::fetchPlaylist(const char *url) { |
| 269 | sp<ABuffer> buffer; |
| 270 | status_t err = fetchFile(url, &buffer); |
| 271 | |
| 272 | if (err != OK) { |
| 273 | return NULL; |
| 274 | } |
| 275 | |
| 276 | sp<M3UParser> playlist = |
| 277 | new M3UParser(url, buffer->data(), buffer->size()); |
| 278 | |
| 279 | if (playlist->initCheck() != OK) { |
| 280 | return NULL; |
| 281 | } |
| 282 | |
| 283 | return playlist; |
| 284 | } |
| 285 | |
| 286 | static double uniformRand() { |
| 287 | return (double)rand() / RAND_MAX; |
| 288 | } |
| 289 | |
| 290 | size_t LiveSession::getBandwidthIndex() { |
| 291 | if (mBandwidthItems.size() == 0) { |
| 292 | return 0; |
| 293 | } |
| 294 | |
| 295 | #if 1 |
| 296 | int32_t bandwidthBps; |
| 297 | if (mHTTPDataSource != NULL |
| 298 | && mHTTPDataSource->estimateBandwidth(&bandwidthBps)) { |
| 299 | LOGV("bandwidth estimated at %.2f kbps", bandwidthBps / 1024.0f); |
| 300 | } else { |
| 301 | LOGV("no bandwidth estimate."); |
| 302 | return 0; // Pick the lowest bandwidth stream by default. |
| 303 | } |
| 304 | |
| 305 | char value[PROPERTY_VALUE_MAX]; |
| 306 | if (property_get("media.httplive.max-bw", value, NULL)) { |
| 307 | char *end; |
| 308 | long maxBw = strtoul(value, &end, 10); |
| 309 | if (end > value && *end == '\0') { |
| 310 | if (maxBw > 0 && bandwidthBps > maxBw) { |
| 311 | LOGV("bandwidth capped to %ld bps", maxBw); |
| 312 | bandwidthBps = maxBw; |
| 313 | } |
| 314 | } |
| 315 | } |
| 316 | |
| 317 | // Consider only 80% of the available bandwidth usable. |
| 318 | bandwidthBps = (bandwidthBps * 8) / 10; |
| 319 | |
| 320 | // Pick the highest bandwidth stream below or equal to estimated bandwidth. |
| 321 | |
| 322 | size_t index = mBandwidthItems.size() - 1; |
| 323 | while (index > 0 && mBandwidthItems.itemAt(index).mBandwidth |
| 324 | > (size_t)bandwidthBps) { |
| 325 | --index; |
| 326 | } |
| 327 | #elif 0 |
| 328 | // Change bandwidth at random() |
| 329 | size_t index = uniformRand() * mBandwidthItems.size(); |
| 330 | #elif 0 |
| 331 | // There's a 50% chance to stay on the current bandwidth and |
| 332 | // a 50% chance to switch to the next higher bandwidth (wrapping around |
| 333 | // to lowest) |
| 334 | const size_t kMinIndex = 0; |
| 335 | |
| 336 | size_t index; |
| 337 | if (mPrevBandwidthIndex < 0) { |
| 338 | index = kMinIndex; |
| 339 | } else if (uniformRand() < 0.5) { |
| 340 | index = (size_t)mPrevBandwidthIndex; |
| 341 | } else { |
| 342 | index = mPrevBandwidthIndex + 1; |
| 343 | if (index == mBandwidthItems.size()) { |
| 344 | index = kMinIndex; |
| 345 | } |
| 346 | } |
| 347 | #elif 0 |
| 348 | // Pick the highest bandwidth stream below or equal to 1.2 Mbit/sec |
| 349 | |
| 350 | size_t index = mBandwidthItems.size() - 1; |
| 351 | while (index > 0 && mBandwidthItems.itemAt(index).mBandwidth > 1200000) { |
| 352 | --index; |
| 353 | } |
| 354 | #else |
| 355 | size_t index = mBandwidthItems.size() - 1; // Highest bandwidth stream |
| 356 | #endif |
| 357 | |
| 358 | return index; |
| 359 | } |
| 360 | |
| 361 | void LiveSession::onDownloadNext() { |
| 362 | size_t bandwidthIndex = getBandwidthIndex(); |
| 363 | |
Andreas Huber | ba572aa | 2011-01-06 16:32:05 -0800 | [diff] [blame] | 364 | rinse_repeat: |
Andreas Huber | b559084 | 2010-12-03 16:12:25 -0800 | [diff] [blame] | 365 | int64_t nowUs = ALooper::GetNowUs(); |
| 366 | |
| 367 | if (mLastPlaylistFetchTimeUs < 0 |
| 368 | || (ssize_t)bandwidthIndex != mPrevBandwidthIndex |
| 369 | || (!mPlaylist->isComplete() |
| 370 | && mLastPlaylistFetchTimeUs + kMaxPlaylistAgeUs <= nowUs)) { |
| 371 | AString url; |
| 372 | if (mBandwidthItems.size() > 0) { |
| 373 | url = mBandwidthItems.editItemAt(bandwidthIndex).mURI; |
| 374 | } else { |
| 375 | url = mMasterURL; |
| 376 | } |
| 377 | |
| 378 | bool firstTime = (mPlaylist == NULL); |
| 379 | |
| 380 | mPlaylist = fetchPlaylist(url.c_str()); |
Andreas Huber | c4f297d | 2010-12-16 11:31:13 -0800 | [diff] [blame] | 381 | if (mPlaylist == NULL) { |
| 382 | LOGE("failed to load playlist at url '%s'", url.c_str()); |
| 383 | mDataSource->queueEOS(ERROR_IO); |
| 384 | return; |
| 385 | } |
Andreas Huber | b559084 | 2010-12-03 16:12:25 -0800 | [diff] [blame] | 386 | |
| 387 | if (firstTime) { |
| 388 | Mutex::Autolock autoLock(mLock); |
| 389 | |
| 390 | int32_t targetDuration; |
| 391 | if (!mPlaylist->isComplete() |
| 392 | || !mPlaylist->meta()->findInt32( |
| 393 | "target-duration", &targetDuration)) { |
| 394 | mDurationUs = -1; |
| 395 | } else { |
| 396 | mDurationUs = 1000000ll * targetDuration * mPlaylist->size(); |
| 397 | } |
| 398 | } |
| 399 | |
| 400 | mLastPlaylistFetchTimeUs = ALooper::GetNowUs(); |
| 401 | } |
| 402 | |
| 403 | int32_t firstSeqNumberInPlaylist; |
| 404 | if (mPlaylist->meta() == NULL || !mPlaylist->meta()->findInt32( |
| 405 | "media-sequence", &firstSeqNumberInPlaylist)) { |
| 406 | firstSeqNumberInPlaylist = 0; |
| 407 | } |
| 408 | |
| 409 | bool explicitDiscontinuity = false; |
Andreas Huber | 847551c | 2011-01-05 16:24:27 -0800 | [diff] [blame] | 410 | bool bandwidthChanged = false; |
Andreas Huber | b559084 | 2010-12-03 16:12:25 -0800 | [diff] [blame] | 411 | |
| 412 | if (mSeekTimeUs >= 0) { |
| 413 | int32_t targetDuration; |
| 414 | if (mPlaylist->isComplete() && |
| 415 | mPlaylist->meta()->findInt32( |
| 416 | "target-duration", &targetDuration)) { |
| 417 | int64_t seekTimeSecs = (mSeekTimeUs + 500000ll) / 1000000ll; |
| 418 | int64_t index = seekTimeSecs / targetDuration; |
| 419 | |
| 420 | if (index >= 0 && index < mPlaylist->size()) { |
Andreas Huber | 08e10cb | 2011-01-05 12:17:08 -0800 | [diff] [blame] | 421 | int32_t newSeqNumber = firstSeqNumberInPlaylist + index; |
Andreas Huber | b559084 | 2010-12-03 16:12:25 -0800 | [diff] [blame] | 422 | |
Andreas Huber | 08e10cb | 2011-01-05 12:17:08 -0800 | [diff] [blame] | 423 | if (newSeqNumber != mSeqNumber) { |
| 424 | LOGI("seeking to seq no %d", newSeqNumber); |
| 425 | |
| 426 | mSeqNumber = newSeqNumber; |
| 427 | |
| 428 | mDataSource->reset(); |
| 429 | |
Andreas Huber | 847551c | 2011-01-05 16:24:27 -0800 | [diff] [blame] | 430 | // reseting the data source will have had the |
| 431 | // side effect of discarding any previously queued |
| 432 | // bandwidth change discontinuity. |
| 433 | // Therefore we'll need to treat these explicit |
| 434 | // discontinuities as involving a bandwidth change |
| 435 | // even if they aren't directly. |
Andreas Huber | 08e10cb | 2011-01-05 12:17:08 -0800 | [diff] [blame] | 436 | explicitDiscontinuity = true; |
Andreas Huber | 847551c | 2011-01-05 16:24:27 -0800 | [diff] [blame] | 437 | bandwidthChanged = true; |
Andreas Huber | 08e10cb | 2011-01-05 12:17:08 -0800 | [diff] [blame] | 438 | } |
Andreas Huber | b559084 | 2010-12-03 16:12:25 -0800 | [diff] [blame] | 439 | } |
| 440 | } |
| 441 | |
| 442 | mSeekTimeUs = -1; |
| 443 | |
| 444 | Mutex::Autolock autoLock(mLock); |
| 445 | mSeekDone = true; |
| 446 | mCondition.broadcast(); |
| 447 | } |
| 448 | |
| 449 | if (mSeqNumber < 0) { |
| 450 | if (mPlaylist->isComplete()) { |
| 451 | mSeqNumber = firstSeqNumberInPlaylist; |
| 452 | } else { |
| 453 | mSeqNumber = firstSeqNumberInPlaylist + mPlaylist->size() / 2; |
| 454 | } |
| 455 | } |
| 456 | |
| 457 | int32_t lastSeqNumberInPlaylist = |
| 458 | firstSeqNumberInPlaylist + (int32_t)mPlaylist->size() - 1; |
| 459 | |
| 460 | if (mSeqNumber < firstSeqNumberInPlaylist |
| 461 | || mSeqNumber > lastSeqNumberInPlaylist) { |
Andreas Huber | 283e031 | 2011-01-19 11:30:43 -0800 | [diff] [blame] | 462 | if (mPrevBandwidthIndex != (ssize_t)bandwidthIndex) { |
Andreas Huber | ba572aa | 2011-01-06 16:32:05 -0800 | [diff] [blame] | 463 | // Go back to the previous bandwidth. |
| 464 | |
| 465 | LOGI("new bandwidth does not have the sequence number " |
| 466 | "we're looking for, switching back to previous bandwidth"); |
| 467 | |
| 468 | mLastPlaylistFetchTimeUs = -1; |
| 469 | bandwidthIndex = mPrevBandwidthIndex; |
| 470 | goto rinse_repeat; |
| 471 | } |
| 472 | |
Andreas Huber | b559084 | 2010-12-03 16:12:25 -0800 | [diff] [blame] | 473 | if (!mPlaylist->isComplete() |
| 474 | && mSeqNumber > lastSeqNumberInPlaylist |
| 475 | && mNumRetries < kMaxNumRetries) { |
| 476 | ++mNumRetries; |
| 477 | |
| 478 | mLastPlaylistFetchTimeUs = -1; |
Andreas Huber | 54e6649 | 2010-12-23 10:27:40 -0800 | [diff] [blame] | 479 | postMonitorQueue(3000000ll); |
Andreas Huber | b559084 | 2010-12-03 16:12:25 -0800 | [diff] [blame] | 480 | return; |
| 481 | } |
| 482 | |
| 483 | LOGE("Cannot find sequence number %d in playlist " |
| 484 | "(contains %d - %d)", |
| 485 | mSeqNumber, firstSeqNumberInPlaylist, |
| 486 | firstSeqNumberInPlaylist + mPlaylist->size() - 1); |
| 487 | |
| 488 | mDataSource->queueEOS(ERROR_END_OF_STREAM); |
| 489 | return; |
| 490 | } |
| 491 | |
| 492 | mNumRetries = 0; |
| 493 | |
| 494 | AString uri; |
| 495 | sp<AMessage> itemMeta; |
| 496 | CHECK(mPlaylist->itemAt( |
| 497 | mSeqNumber - firstSeqNumberInPlaylist, |
| 498 | &uri, |
| 499 | &itemMeta)); |
| 500 | |
| 501 | int32_t val; |
| 502 | if (itemMeta->findInt32("discontinuity", &val) && val != 0) { |
| 503 | explicitDiscontinuity = true; |
| 504 | } |
| 505 | |
| 506 | sp<ABuffer> buffer; |
| 507 | status_t err = fetchFile(uri.c_str(), &buffer); |
Andreas Huber | c4f297d | 2010-12-16 11:31:13 -0800 | [diff] [blame] | 508 | if (err != OK) { |
| 509 | LOGE("failed to fetch .ts segment at url '%s'", uri.c_str()); |
| 510 | mDataSource->queueEOS(err); |
| 511 | return; |
| 512 | } |
Andreas Huber | b559084 | 2010-12-03 16:12:25 -0800 | [diff] [blame] | 513 | |
Andreas Huber | 08e10cb | 2011-01-05 12:17:08 -0800 | [diff] [blame] | 514 | CHECK(buffer != NULL); |
| 515 | |
Andreas Huber | 0cf2616 | 2011-01-19 11:24:39 -0800 | [diff] [blame] | 516 | err = decryptBuffer(mSeqNumber - firstSeqNumberInPlaylist, buffer); |
| 517 | |
| 518 | if (err != OK) { |
| 519 | LOGE("decryptBuffer failed w/ error %d", err); |
| 520 | |
| 521 | mDataSource->queueEOS(err); |
| 522 | return; |
| 523 | } |
Andreas Huber | b559084 | 2010-12-03 16:12:25 -0800 | [diff] [blame] | 524 | |
| 525 | if (buffer->size() == 0 || buffer->data()[0] != 0x47) { |
| 526 | // Not a transport stream??? |
| 527 | |
| 528 | LOGE("This doesn't look like a transport stream..."); |
| 529 | |
Andreas Huber | 19922ad | 2011-01-21 10:15:23 -0800 | [diff] [blame] | 530 | mBandwidthItems.removeAt(bandwidthIndex); |
| 531 | |
| 532 | if (mBandwidthItems.isEmpty()) { |
| 533 | mDataSource->queueEOS(ERROR_UNSUPPORTED); |
| 534 | return; |
| 535 | } |
| 536 | |
| 537 | LOGI("Retrying with a different bandwidth stream."); |
| 538 | |
| 539 | mLastPlaylistFetchTimeUs = -1; |
| 540 | bandwidthIndex = getBandwidthIndex(); |
| 541 | mPrevBandwidthIndex = bandwidthIndex; |
| 542 | mSeqNumber = -1; |
| 543 | |
| 544 | goto rinse_repeat; |
Andreas Huber | b559084 | 2010-12-03 16:12:25 -0800 | [diff] [blame] | 545 | } |
| 546 | |
Andreas Huber | 847551c | 2011-01-05 16:24:27 -0800 | [diff] [blame] | 547 | if ((size_t)mPrevBandwidthIndex != bandwidthIndex) { |
| 548 | bandwidthChanged = true; |
| 549 | } |
| 550 | |
| 551 | if (mPrevBandwidthIndex < 0) { |
| 552 | // Don't signal a bandwidth change at the very beginning of |
| 553 | // playback. |
| 554 | bandwidthChanged = false; |
| 555 | } |
Andreas Huber | 41c3f74 | 2010-12-21 10:22:33 -0800 | [diff] [blame] | 556 | |
| 557 | if (explicitDiscontinuity || bandwidthChanged) { |
Andreas Huber | b559084 | 2010-12-03 16:12:25 -0800 | [diff] [blame] | 558 | // Signal discontinuity. |
| 559 | |
Andreas Huber | 08e10cb | 2011-01-05 12:17:08 -0800 | [diff] [blame] | 560 | LOGI("queueing discontinuity (explicit=%d, bandwidthChanged=%d)", |
| 561 | explicitDiscontinuity, bandwidthChanged); |
| 562 | |
Andreas Huber | b559084 | 2010-12-03 16:12:25 -0800 | [diff] [blame] | 563 | sp<ABuffer> tmp = new ABuffer(188); |
| 564 | memset(tmp->data(), 0, tmp->size()); |
Andreas Huber | 41c3f74 | 2010-12-21 10:22:33 -0800 | [diff] [blame] | 565 | tmp->data()[1] = bandwidthChanged; |
Andreas Huber | b559084 | 2010-12-03 16:12:25 -0800 | [diff] [blame] | 566 | |
| 567 | mDataSource->queueBuffer(tmp); |
| 568 | } |
| 569 | |
| 570 | mDataSource->queueBuffer(buffer); |
| 571 | |
| 572 | mPrevBandwidthIndex = bandwidthIndex; |
| 573 | ++mSeqNumber; |
| 574 | |
| 575 | postMonitorQueue(); |
| 576 | } |
| 577 | |
| 578 | void LiveSession::onMonitorQueue() { |
| 579 | if (mSeekTimeUs >= 0 |
| 580 | || mDataSource->countQueuedBuffers() < kMaxNumQueuedFragments) { |
| 581 | onDownloadNext(); |
| 582 | } else { |
| 583 | postMonitorQueue(1000000ll); |
| 584 | } |
| 585 | } |
| 586 | |
| 587 | status_t LiveSession::decryptBuffer( |
| 588 | size_t playlistIndex, const sp<ABuffer> &buffer) { |
| 589 | sp<AMessage> itemMeta; |
| 590 | bool found = false; |
| 591 | AString method; |
| 592 | |
| 593 | for (ssize_t i = playlistIndex; i >= 0; --i) { |
| 594 | AString uri; |
| 595 | CHECK(mPlaylist->itemAt(i, &uri, &itemMeta)); |
| 596 | |
| 597 | if (itemMeta->findString("cipher-method", &method)) { |
| 598 | found = true; |
| 599 | break; |
| 600 | } |
| 601 | } |
| 602 | |
| 603 | if (!found) { |
| 604 | method = "NONE"; |
| 605 | } |
| 606 | |
| 607 | if (method == "NONE") { |
| 608 | return OK; |
| 609 | } else if (!(method == "AES-128")) { |
| 610 | LOGE("Unsupported cipher method '%s'", method.c_str()); |
| 611 | return ERROR_UNSUPPORTED; |
| 612 | } |
| 613 | |
| 614 | AString keyURI; |
| 615 | if (!itemMeta->findString("cipher-uri", &keyURI)) { |
| 616 | LOGE("Missing key uri"); |
| 617 | return ERROR_MALFORMED; |
| 618 | } |
| 619 | |
| 620 | ssize_t index = mAESKeyForURI.indexOfKey(keyURI); |
| 621 | |
| 622 | sp<ABuffer> key; |
| 623 | if (index >= 0) { |
| 624 | key = mAESKeyForURI.valueAt(index); |
| 625 | } else { |
| 626 | key = new ABuffer(16); |
| 627 | |
| 628 | sp<NuHTTPDataSource> keySource = new NuHTTPDataSource; |
| 629 | status_t err = keySource->connect(keyURI.c_str()); |
| 630 | |
| 631 | if (err == OK) { |
| 632 | size_t offset = 0; |
| 633 | while (offset < 16) { |
| 634 | ssize_t n = keySource->readAt( |
| 635 | offset, key->data() + offset, 16 - offset); |
| 636 | if (n <= 0) { |
| 637 | err = ERROR_IO; |
| 638 | break; |
| 639 | } |
| 640 | |
| 641 | offset += n; |
| 642 | } |
| 643 | } |
| 644 | |
| 645 | if (err != OK) { |
| 646 | LOGE("failed to fetch cipher key from '%s'.", keyURI.c_str()); |
| 647 | return ERROR_IO; |
| 648 | } |
| 649 | |
| 650 | mAESKeyForURI.add(keyURI, key); |
| 651 | } |
| 652 | |
| 653 | AES_KEY aes_key; |
| 654 | if (AES_set_decrypt_key(key->data(), 128, &aes_key) != 0) { |
| 655 | LOGE("failed to set AES decryption key."); |
| 656 | return UNKNOWN_ERROR; |
| 657 | } |
| 658 | |
| 659 | unsigned char aes_ivec[16]; |
| 660 | |
| 661 | AString iv; |
| 662 | if (itemMeta->findString("cipher-iv", &iv)) { |
| 663 | if ((!iv.startsWith("0x") && !iv.startsWith("0X")) |
| 664 | || iv.size() != 16 * 2 + 2) { |
| 665 | LOGE("malformed cipher IV '%s'.", iv.c_str()); |
| 666 | return ERROR_MALFORMED; |
| 667 | } |
| 668 | |
| 669 | memset(aes_ivec, 0, sizeof(aes_ivec)); |
| 670 | for (size_t i = 0; i < 16; ++i) { |
| 671 | char c1 = tolower(iv.c_str()[2 + 2 * i]); |
| 672 | char c2 = tolower(iv.c_str()[3 + 2 * i]); |
| 673 | if (!isxdigit(c1) || !isxdigit(c2)) { |
| 674 | LOGE("malformed cipher IV '%s'.", iv.c_str()); |
| 675 | return ERROR_MALFORMED; |
| 676 | } |
| 677 | uint8_t nibble1 = isdigit(c1) ? c1 - '0' : c1 - 'a' + 10; |
| 678 | uint8_t nibble2 = isdigit(c2) ? c2 - '0' : c2 - 'a' + 10; |
| 679 | |
| 680 | aes_ivec[i] = nibble1 << 4 | nibble2; |
| 681 | } |
| 682 | } else { |
| 683 | memset(aes_ivec, 0, sizeof(aes_ivec)); |
| 684 | aes_ivec[15] = mSeqNumber & 0xff; |
| 685 | aes_ivec[14] = (mSeqNumber >> 8) & 0xff; |
| 686 | aes_ivec[13] = (mSeqNumber >> 16) & 0xff; |
| 687 | aes_ivec[12] = (mSeqNumber >> 24) & 0xff; |
| 688 | } |
| 689 | |
| 690 | AES_cbc_encrypt( |
| 691 | buffer->data(), buffer->data(), buffer->size(), |
| 692 | &aes_key, aes_ivec, AES_DECRYPT); |
| 693 | |
| 694 | // hexdump(buffer->data(), buffer->size()); |
| 695 | |
| 696 | size_t n = buffer->size(); |
| 697 | CHECK_GT(n, 0u); |
| 698 | |
| 699 | size_t pad = buffer->data()[n - 1]; |
| 700 | |
| 701 | CHECK_GT(pad, 0u); |
| 702 | CHECK_LE(pad, 16u); |
| 703 | CHECK_GE((size_t)n, pad); |
| 704 | for (size_t i = 0; i < pad; ++i) { |
| 705 | CHECK_EQ((unsigned)buffer->data()[n - 1 - i], pad); |
| 706 | } |
| 707 | |
| 708 | n -= pad; |
| 709 | |
| 710 | buffer->setRange(buffer->offset(), n); |
| 711 | |
| 712 | return OK; |
| 713 | } |
| 714 | |
| 715 | void LiveSession::postMonitorQueue(int64_t delayUs) { |
| 716 | sp<AMessage> msg = new AMessage(kWhatMonitorQueue, id()); |
| 717 | msg->setInt32("generation", ++mMonitorQueueGeneration); |
| 718 | msg->post(delayUs); |
| 719 | } |
| 720 | |
| 721 | void LiveSession::onSeek(const sp<AMessage> &msg) { |
| 722 | int64_t timeUs; |
| 723 | CHECK(msg->findInt64("timeUs", &timeUs)); |
| 724 | |
| 725 | mSeekTimeUs = timeUs; |
| 726 | postMonitorQueue(); |
| 727 | } |
| 728 | |
| 729 | status_t LiveSession::getDuration(int64_t *durationUs) { |
| 730 | Mutex::Autolock autoLock(mLock); |
| 731 | *durationUs = mDurationUs; |
| 732 | |
| 733 | return OK; |
| 734 | } |
| 735 | |
| 736 | bool LiveSession::isSeekable() { |
| 737 | int64_t durationUs; |
| 738 | return getDuration(&durationUs) == OK && durationUs >= 0; |
| 739 | } |
| 740 | |
| 741 | } // namespace android |
| 742 | |