Andreas Huber | a44153c | 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" |
Andreas Huber | 1156dc9 | 2011-03-08 15:59:28 -0800 | [diff] [blame] | 26 | #include "include/HTTPBase.h" |
Andreas Huber | a44153c | 2010-12-03 16:12:25 -0800 | [diff] [blame] | 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> |
Andreas Huber | 7e43a5a | 2011-07-15 11:30:16 -0700 | [diff] [blame] | 39 | #include <openssl/md5.h> |
Andreas Huber | a44153c | 2010-12-03 16:12:25 -0800 | [diff] [blame] | 40 | |
| 41 | namespace android { |
| 42 | |
Andreas Huber | 9b80c2b | 2011-06-30 15:47:02 -0700 | [diff] [blame] | 43 | LiveSession::LiveSession(uint32_t flags, bool uidValid, uid_t uid) |
Andreas Huber | 7314fa1 | 2011-02-24 14:42:48 -0800 | [diff] [blame] | 44 | : mFlags(flags), |
Andreas Huber | 9b80c2b | 2011-06-30 15:47:02 -0700 | [diff] [blame] | 45 | mUIDValid(uidValid), |
| 46 | mUID(uid), |
Andreas Huber | 7314fa1 | 2011-02-24 14:42:48 -0800 | [diff] [blame] | 47 | mDataSource(new LiveDataSource), |
| 48 | mHTTPDataSource( |
Andreas Huber | 1156dc9 | 2011-03-08 15:59:28 -0800 | [diff] [blame] | 49 | HTTPBase::Create( |
Andreas Huber | 7314fa1 | 2011-02-24 14:42:48 -0800 | [diff] [blame] | 50 | (mFlags & kFlagIncognito) |
Andreas Huber | 1156dc9 | 2011-03-08 15:59:28 -0800 | [diff] [blame] | 51 | ? HTTPBase::kFlagIncognito |
Andreas Huber | 7314fa1 | 2011-02-24 14:42:48 -0800 | [diff] [blame] | 52 | : 0)), |
Andreas Huber | a44153c | 2010-12-03 16:12:25 -0800 | [diff] [blame] | 53 | mPrevBandwidthIndex(-1), |
| 54 | mLastPlaylistFetchTimeUs(-1), |
| 55 | mSeqNumber(-1), |
| 56 | mSeekTimeUs(-1), |
| 57 | mNumRetries(0), |
| 58 | mDurationUs(-1), |
| 59 | mSeekDone(false), |
Andreas Huber | ab8a0ba | 2011-01-31 16:18:49 -0800 | [diff] [blame] | 60 | mDisconnectPending(false), |
Andreas Huber | 7e43a5a | 2011-07-15 11:30:16 -0700 | [diff] [blame] | 61 | mMonitorQueueGeneration(0), |
| 62 | mRefreshState(INITIAL_MINIMUM_RELOAD_DELAY) { |
Andreas Huber | 9b80c2b | 2011-06-30 15:47:02 -0700 | [diff] [blame] | 63 | if (mUIDValid) { |
| 64 | mHTTPDataSource->setUID(mUID); |
| 65 | } |
Andreas Huber | a44153c | 2010-12-03 16:12:25 -0800 | [diff] [blame] | 66 | } |
| 67 | |
| 68 | LiveSession::~LiveSession() { |
| 69 | } |
| 70 | |
| 71 | sp<DataSource> LiveSession::getDataSource() { |
| 72 | return mDataSource; |
| 73 | } |
| 74 | |
Andreas Huber | ad0d9c9 | 2011-04-19 11:50:27 -0700 | [diff] [blame] | 75 | void LiveSession::connect( |
| 76 | const char *url, const KeyedVector<String8, String8> *headers) { |
Andreas Huber | a44153c | 2010-12-03 16:12:25 -0800 | [diff] [blame] | 77 | sp<AMessage> msg = new AMessage(kWhatConnect, id()); |
| 78 | msg->setString("url", url); |
Andreas Huber | ad0d9c9 | 2011-04-19 11:50:27 -0700 | [diff] [blame] | 79 | |
| 80 | if (headers != NULL) { |
| 81 | msg->setPointer( |
| 82 | "headers", |
| 83 | new KeyedVector<String8, String8>(*headers)); |
| 84 | } |
| 85 | |
Andreas Huber | a44153c | 2010-12-03 16:12:25 -0800 | [diff] [blame] | 86 | msg->post(); |
| 87 | } |
| 88 | |
| 89 | void LiveSession::disconnect() { |
Andreas Huber | ab8a0ba | 2011-01-31 16:18:49 -0800 | [diff] [blame] | 90 | Mutex::Autolock autoLock(mLock); |
| 91 | mDisconnectPending = true; |
| 92 | |
| 93 | mHTTPDataSource->disconnect(); |
| 94 | |
Andreas Huber | a44153c | 2010-12-03 16:12:25 -0800 | [diff] [blame] | 95 | (new AMessage(kWhatDisconnect, id()))->post(); |
| 96 | } |
| 97 | |
| 98 | void LiveSession::seekTo(int64_t timeUs) { |
| 99 | Mutex::Autolock autoLock(mLock); |
| 100 | mSeekDone = false; |
| 101 | |
| 102 | sp<AMessage> msg = new AMessage(kWhatSeek, id()); |
| 103 | msg->setInt64("timeUs", timeUs); |
| 104 | msg->post(); |
| 105 | |
| 106 | while (!mSeekDone) { |
| 107 | mCondition.wait(mLock); |
| 108 | } |
| 109 | } |
| 110 | |
| 111 | void LiveSession::onMessageReceived(const sp<AMessage> &msg) { |
| 112 | switch (msg->what()) { |
| 113 | case kWhatConnect: |
| 114 | onConnect(msg); |
| 115 | break; |
| 116 | |
| 117 | case kWhatDisconnect: |
| 118 | onDisconnect(); |
| 119 | break; |
| 120 | |
| 121 | case kWhatMonitorQueue: |
| 122 | { |
| 123 | int32_t generation; |
| 124 | CHECK(msg->findInt32("generation", &generation)); |
| 125 | |
| 126 | if (generation != mMonitorQueueGeneration) { |
| 127 | // Stale event |
| 128 | break; |
| 129 | } |
| 130 | |
| 131 | onMonitorQueue(); |
| 132 | break; |
| 133 | } |
| 134 | |
| 135 | case kWhatSeek: |
| 136 | onSeek(msg); |
| 137 | break; |
| 138 | |
| 139 | default: |
| 140 | TRESPASS(); |
| 141 | break; |
| 142 | } |
| 143 | } |
| 144 | |
| 145 | // static |
| 146 | int LiveSession::SortByBandwidth(const BandwidthItem *a, const BandwidthItem *b) { |
| 147 | if (a->mBandwidth < b->mBandwidth) { |
| 148 | return -1; |
| 149 | } else if (a->mBandwidth == b->mBandwidth) { |
| 150 | return 0; |
| 151 | } |
| 152 | |
| 153 | return 1; |
| 154 | } |
| 155 | |
| 156 | void LiveSession::onConnect(const sp<AMessage> &msg) { |
| 157 | AString url; |
| 158 | CHECK(msg->findString("url", &url)); |
| 159 | |
Andreas Huber | ad0d9c9 | 2011-04-19 11:50:27 -0700 | [diff] [blame] | 160 | KeyedVector<String8, String8> *headers = NULL; |
| 161 | if (!msg->findPointer("headers", (void **)&headers)) { |
| 162 | mExtraHeaders.clear(); |
| 163 | } else { |
| 164 | mExtraHeaders = *headers; |
| 165 | |
| 166 | delete headers; |
| 167 | headers = NULL; |
| 168 | } |
| 169 | |
Andreas Huber | 7314fa1 | 2011-02-24 14:42:48 -0800 | [diff] [blame] | 170 | if (!(mFlags & kFlagIncognito)) { |
| 171 | LOGI("onConnect '%s'", url.c_str()); |
| 172 | } else { |
| 173 | LOGI("onConnect <URL suppressed>"); |
| 174 | } |
Andreas Huber | a44153c | 2010-12-03 16:12:25 -0800 | [diff] [blame] | 175 | |
| 176 | mMasterURL = url; |
| 177 | |
Andreas Huber | 7e43a5a | 2011-07-15 11:30:16 -0700 | [diff] [blame] | 178 | bool dummy; |
| 179 | sp<M3UParser> playlist = fetchPlaylist(url.c_str(), &dummy); |
Andreas Huber | ab8a0ba | 2011-01-31 16:18:49 -0800 | [diff] [blame] | 180 | |
| 181 | if (playlist == NULL) { |
| 182 | LOGE("unable to fetch master playlist '%s'.", url.c_str()); |
| 183 | |
| 184 | mDataSource->queueEOS(ERROR_IO); |
| 185 | return; |
| 186 | } |
Andreas Huber | a44153c | 2010-12-03 16:12:25 -0800 | [diff] [blame] | 187 | |
| 188 | if (playlist->isVariantPlaylist()) { |
| 189 | for (size_t i = 0; i < playlist->size(); ++i) { |
| 190 | BandwidthItem item; |
| 191 | |
| 192 | sp<AMessage> meta; |
| 193 | playlist->itemAt(i, &item.mURI, &meta); |
| 194 | |
| 195 | unsigned long bandwidth; |
| 196 | CHECK(meta->findInt32("bandwidth", (int32_t *)&item.mBandwidth)); |
| 197 | |
| 198 | mBandwidthItems.push(item); |
| 199 | } |
| 200 | |
| 201 | CHECK_GT(mBandwidthItems.size(), 0u); |
| 202 | |
| 203 | mBandwidthItems.sort(SortByBandwidth); |
Andreas Huber | a44153c | 2010-12-03 16:12:25 -0800 | [diff] [blame] | 204 | } |
| 205 | |
| 206 | postMonitorQueue(); |
| 207 | } |
| 208 | |
| 209 | void LiveSession::onDisconnect() { |
| 210 | LOGI("onDisconnect"); |
| 211 | |
| 212 | mDataSource->queueEOS(ERROR_END_OF_STREAM); |
Andreas Huber | ab8a0ba | 2011-01-31 16:18:49 -0800 | [diff] [blame] | 213 | |
| 214 | Mutex::Autolock autoLock(mLock); |
| 215 | mDisconnectPending = false; |
Andreas Huber | a44153c | 2010-12-03 16:12:25 -0800 | [diff] [blame] | 216 | } |
| 217 | |
| 218 | status_t LiveSession::fetchFile(const char *url, sp<ABuffer> *out) { |
| 219 | *out = NULL; |
| 220 | |
| 221 | sp<DataSource> source; |
| 222 | |
| 223 | if (!strncasecmp(url, "file://", 7)) { |
| 224 | source = new FileSource(url + 7); |
Andreas Huber | 8cb0c41 | 2011-02-17 13:35:08 -0800 | [diff] [blame] | 225 | } else if (strncasecmp(url, "http://", 7) |
| 226 | && strncasecmp(url, "https://", 8)) { |
Andreas Huber | df42f94 | 2010-12-21 14:36:19 -0800 | [diff] [blame] | 227 | return ERROR_UNSUPPORTED; |
Andreas Huber | a44153c | 2010-12-03 16:12:25 -0800 | [diff] [blame] | 228 | } else { |
Andreas Huber | ab8a0ba | 2011-01-31 16:18:49 -0800 | [diff] [blame] | 229 | { |
| 230 | Mutex::Autolock autoLock(mLock); |
| 231 | |
| 232 | if (mDisconnectPending) { |
| 233 | return ERROR_IO; |
| 234 | } |
| 235 | } |
| 236 | |
Andreas Huber | ad0d9c9 | 2011-04-19 11:50:27 -0700 | [diff] [blame] | 237 | status_t err = mHTTPDataSource->connect( |
| 238 | url, mExtraHeaders.isEmpty() ? NULL : &mExtraHeaders); |
Andreas Huber | a44153c | 2010-12-03 16:12:25 -0800 | [diff] [blame] | 239 | |
| 240 | if (err != OK) { |
| 241 | return err; |
| 242 | } |
| 243 | |
| 244 | source = mHTTPDataSource; |
| 245 | } |
| 246 | |
| 247 | off64_t size; |
| 248 | status_t err = source->getSize(&size); |
| 249 | |
| 250 | if (err != OK) { |
| 251 | size = 65536; |
| 252 | } |
| 253 | |
| 254 | sp<ABuffer> buffer = new ABuffer(size); |
| 255 | buffer->setRange(0, 0); |
| 256 | |
| 257 | for (;;) { |
| 258 | size_t bufferRemaining = buffer->capacity() - buffer->size(); |
| 259 | |
| 260 | if (bufferRemaining == 0) { |
| 261 | bufferRemaining = 32768; |
| 262 | |
| 263 | LOGV("increasing download buffer to %d bytes", |
| 264 | buffer->size() + bufferRemaining); |
| 265 | |
| 266 | sp<ABuffer> copy = new ABuffer(buffer->size() + bufferRemaining); |
| 267 | memcpy(copy->data(), buffer->data(), buffer->size()); |
| 268 | copy->setRange(0, buffer->size()); |
| 269 | |
| 270 | buffer = copy; |
| 271 | } |
| 272 | |
| 273 | ssize_t n = source->readAt( |
| 274 | buffer->size(), buffer->data() + buffer->size(), |
| 275 | bufferRemaining); |
| 276 | |
| 277 | if (n < 0) { |
Andreas Huber | 20ad3a3 | 2011-01-06 17:32:00 -0800 | [diff] [blame] | 278 | return n; |
Andreas Huber | a44153c | 2010-12-03 16:12:25 -0800 | [diff] [blame] | 279 | } |
| 280 | |
| 281 | if (n == 0) { |
| 282 | break; |
| 283 | } |
| 284 | |
| 285 | buffer->setRange(0, buffer->size() + (size_t)n); |
| 286 | } |
| 287 | |
| 288 | *out = buffer; |
| 289 | |
| 290 | return OK; |
| 291 | } |
| 292 | |
Andreas Huber | 7e43a5a | 2011-07-15 11:30:16 -0700 | [diff] [blame] | 293 | sp<M3UParser> LiveSession::fetchPlaylist(const char *url, bool *unchanged) { |
| 294 | *unchanged = false; |
| 295 | |
Andreas Huber | a44153c | 2010-12-03 16:12:25 -0800 | [diff] [blame] | 296 | sp<ABuffer> buffer; |
| 297 | status_t err = fetchFile(url, &buffer); |
| 298 | |
| 299 | if (err != OK) { |
| 300 | return NULL; |
| 301 | } |
| 302 | |
Andreas Huber | 7e43a5a | 2011-07-15 11:30:16 -0700 | [diff] [blame] | 303 | // MD5 functionality is not available on the simulator, treat all |
| 304 | // playlists as changed. |
| 305 | |
| 306 | #if defined(HAVE_ANDROID_OS) |
| 307 | uint8_t hash[16]; |
| 308 | |
| 309 | MD5_CTX m; |
| 310 | MD5_Init(&m); |
| 311 | MD5_Update(&m, buffer->data(), buffer->size()); |
| 312 | |
| 313 | MD5_Final(hash, &m); |
| 314 | |
| 315 | if (mPlaylist != NULL && !memcmp(hash, mPlaylistHash, 16)) { |
| 316 | // playlist unchanged |
| 317 | |
| 318 | if (mRefreshState != THIRD_UNCHANGED_RELOAD_ATTEMPT) { |
| 319 | mRefreshState = (RefreshState)(mRefreshState + 1); |
| 320 | } |
| 321 | |
| 322 | *unchanged = true; |
| 323 | |
| 324 | LOGV("Playlist unchanged, refresh state is now %d", |
| 325 | (int)mRefreshState); |
| 326 | |
| 327 | return NULL; |
| 328 | } |
| 329 | |
| 330 | memcpy(mPlaylistHash, hash, sizeof(hash)); |
| 331 | |
| 332 | mRefreshState = INITIAL_MINIMUM_RELOAD_DELAY; |
| 333 | #endif |
| 334 | |
Andreas Huber | a44153c | 2010-12-03 16:12:25 -0800 | [diff] [blame] | 335 | sp<M3UParser> playlist = |
| 336 | new M3UParser(url, buffer->data(), buffer->size()); |
| 337 | |
| 338 | if (playlist->initCheck() != OK) { |
Andreas Huber | 9067e30 | 2011-06-21 11:55:34 -0700 | [diff] [blame] | 339 | LOGE("failed to parse .m3u8 playlist"); |
| 340 | |
Andreas Huber | a44153c | 2010-12-03 16:12:25 -0800 | [diff] [blame] | 341 | return NULL; |
| 342 | } |
| 343 | |
| 344 | return playlist; |
| 345 | } |
| 346 | |
| 347 | static double uniformRand() { |
| 348 | return (double)rand() / RAND_MAX; |
| 349 | } |
| 350 | |
| 351 | size_t LiveSession::getBandwidthIndex() { |
| 352 | if (mBandwidthItems.size() == 0) { |
| 353 | return 0; |
| 354 | } |
| 355 | |
| 356 | #if 1 |
| 357 | int32_t bandwidthBps; |
| 358 | if (mHTTPDataSource != NULL |
| 359 | && mHTTPDataSource->estimateBandwidth(&bandwidthBps)) { |
| 360 | LOGV("bandwidth estimated at %.2f kbps", bandwidthBps / 1024.0f); |
| 361 | } else { |
| 362 | LOGV("no bandwidth estimate."); |
| 363 | return 0; // Pick the lowest bandwidth stream by default. |
| 364 | } |
| 365 | |
| 366 | char value[PROPERTY_VALUE_MAX]; |
| 367 | if (property_get("media.httplive.max-bw", value, NULL)) { |
| 368 | char *end; |
| 369 | long maxBw = strtoul(value, &end, 10); |
| 370 | if (end > value && *end == '\0') { |
| 371 | if (maxBw > 0 && bandwidthBps > maxBw) { |
| 372 | LOGV("bandwidth capped to %ld bps", maxBw); |
| 373 | bandwidthBps = maxBw; |
| 374 | } |
| 375 | } |
| 376 | } |
| 377 | |
| 378 | // Consider only 80% of the available bandwidth usable. |
| 379 | bandwidthBps = (bandwidthBps * 8) / 10; |
| 380 | |
| 381 | // Pick the highest bandwidth stream below or equal to estimated bandwidth. |
| 382 | |
| 383 | size_t index = mBandwidthItems.size() - 1; |
| 384 | while (index > 0 && mBandwidthItems.itemAt(index).mBandwidth |
| 385 | > (size_t)bandwidthBps) { |
| 386 | --index; |
| 387 | } |
| 388 | #elif 0 |
| 389 | // Change bandwidth at random() |
| 390 | size_t index = uniformRand() * mBandwidthItems.size(); |
| 391 | #elif 0 |
| 392 | // There's a 50% chance to stay on the current bandwidth and |
| 393 | // a 50% chance to switch to the next higher bandwidth (wrapping around |
| 394 | // to lowest) |
| 395 | const size_t kMinIndex = 0; |
| 396 | |
| 397 | size_t index; |
| 398 | if (mPrevBandwidthIndex < 0) { |
| 399 | index = kMinIndex; |
| 400 | } else if (uniformRand() < 0.5) { |
| 401 | index = (size_t)mPrevBandwidthIndex; |
| 402 | } else { |
| 403 | index = mPrevBandwidthIndex + 1; |
| 404 | if (index == mBandwidthItems.size()) { |
| 405 | index = kMinIndex; |
| 406 | } |
| 407 | } |
| 408 | #elif 0 |
| 409 | // Pick the highest bandwidth stream below or equal to 1.2 Mbit/sec |
| 410 | |
| 411 | size_t index = mBandwidthItems.size() - 1; |
| 412 | while (index > 0 && mBandwidthItems.itemAt(index).mBandwidth > 1200000) { |
| 413 | --index; |
| 414 | } |
| 415 | #else |
| 416 | size_t index = mBandwidthItems.size() - 1; // Highest bandwidth stream |
| 417 | #endif |
| 418 | |
| 419 | return index; |
| 420 | } |
| 421 | |
Andreas Huber | 7e43a5a | 2011-07-15 11:30:16 -0700 | [diff] [blame] | 422 | bool LiveSession::timeToRefreshPlaylist(int64_t nowUs) const { |
| 423 | if (mPlaylist == NULL) { |
| 424 | CHECK_EQ((int)mRefreshState, (int)INITIAL_MINIMUM_RELOAD_DELAY); |
| 425 | return true; |
| 426 | } |
| 427 | |
| 428 | int32_t targetDurationSecs; |
| 429 | CHECK(mPlaylist->meta()->findInt32("target-duration", &targetDurationSecs)); |
| 430 | |
| 431 | int64_t targetDurationUs = targetDurationSecs * 1000000ll; |
| 432 | |
| 433 | int64_t minPlaylistAgeUs; |
| 434 | |
| 435 | switch (mRefreshState) { |
| 436 | case INITIAL_MINIMUM_RELOAD_DELAY: |
| 437 | { |
| 438 | size_t n = mPlaylist->size(); |
| 439 | if (n > 0) { |
| 440 | sp<AMessage> itemMeta; |
| 441 | CHECK(mPlaylist->itemAt(n - 1, NULL /* uri */, &itemMeta)); |
| 442 | |
| 443 | int64_t itemDurationUs; |
| 444 | CHECK(itemMeta->findInt64("durationUs", &itemDurationUs)); |
| 445 | |
| 446 | minPlaylistAgeUs = itemDurationUs; |
| 447 | break; |
| 448 | } |
| 449 | |
| 450 | // fall through |
| 451 | } |
| 452 | |
| 453 | case FIRST_UNCHANGED_RELOAD_ATTEMPT: |
| 454 | { |
| 455 | minPlaylistAgeUs = targetDurationUs / 2; |
| 456 | break; |
| 457 | } |
| 458 | |
| 459 | case SECOND_UNCHANGED_RELOAD_ATTEMPT: |
| 460 | { |
| 461 | minPlaylistAgeUs = (targetDurationUs * 3) / 2; |
| 462 | break; |
| 463 | } |
| 464 | |
| 465 | case THIRD_UNCHANGED_RELOAD_ATTEMPT: |
| 466 | { |
| 467 | minPlaylistAgeUs = targetDurationUs * 3; |
| 468 | break; |
| 469 | } |
| 470 | |
| 471 | default: |
| 472 | TRESPASS(); |
| 473 | break; |
| 474 | } |
| 475 | |
| 476 | return mLastPlaylistFetchTimeUs + minPlaylistAgeUs <= nowUs; |
| 477 | } |
| 478 | |
Andreas Huber | a44153c | 2010-12-03 16:12:25 -0800 | [diff] [blame] | 479 | void LiveSession::onDownloadNext() { |
| 480 | size_t bandwidthIndex = getBandwidthIndex(); |
| 481 | |
Andreas Huber | aea5aff | 2011-01-06 16:32:05 -0800 | [diff] [blame] | 482 | rinse_repeat: |
Andreas Huber | a44153c | 2010-12-03 16:12:25 -0800 | [diff] [blame] | 483 | int64_t nowUs = ALooper::GetNowUs(); |
| 484 | |
| 485 | if (mLastPlaylistFetchTimeUs < 0 |
| 486 | || (ssize_t)bandwidthIndex != mPrevBandwidthIndex |
Andreas Huber | 7e43a5a | 2011-07-15 11:30:16 -0700 | [diff] [blame] | 487 | || (!mPlaylist->isComplete() && timeToRefreshPlaylist(nowUs))) { |
Andreas Huber | a44153c | 2010-12-03 16:12:25 -0800 | [diff] [blame] | 488 | AString url; |
| 489 | if (mBandwidthItems.size() > 0) { |
| 490 | url = mBandwidthItems.editItemAt(bandwidthIndex).mURI; |
| 491 | } else { |
| 492 | url = mMasterURL; |
| 493 | } |
| 494 | |
| 495 | bool firstTime = (mPlaylist == NULL); |
| 496 | |
Andreas Huber | 8dae4ca | 2011-07-15 16:53:31 -0700 | [diff] [blame^] | 497 | if ((ssize_t)bandwidthIndex != mPrevBandwidthIndex) { |
| 498 | // If we switch bandwidths, do not pay any heed to whether |
| 499 | // playlists changed since the last time... |
| 500 | mPlaylist.clear(); |
| 501 | } |
| 502 | |
Andreas Huber | 7e43a5a | 2011-07-15 11:30:16 -0700 | [diff] [blame] | 503 | bool unchanged; |
| 504 | sp<M3UParser> playlist = fetchPlaylist(url.c_str(), &unchanged); |
| 505 | if (playlist == NULL) { |
| 506 | if (unchanged) { |
| 507 | // We succeeded in fetching the playlist, but it was |
| 508 | // unchanged from the last time we tried. |
| 509 | } else { |
| 510 | LOGE("failed to load playlist at url '%s'", url.c_str()); |
| 511 | mDataSource->queueEOS(ERROR_IO); |
| 512 | return; |
| 513 | } |
| 514 | } else { |
| 515 | mPlaylist = playlist; |
Andreas Huber | 6e6b1ca | 2010-12-16 11:31:13 -0800 | [diff] [blame] | 516 | } |
Andreas Huber | a44153c | 2010-12-03 16:12:25 -0800 | [diff] [blame] | 517 | |
| 518 | if (firstTime) { |
| 519 | Mutex::Autolock autoLock(mLock); |
| 520 | |
Andreas Huber | 0f30bd9 | 2011-06-30 16:52:33 -0700 | [diff] [blame] | 521 | if (!mPlaylist->isComplete()) { |
Andreas Huber | a44153c | 2010-12-03 16:12:25 -0800 | [diff] [blame] | 522 | mDurationUs = -1; |
| 523 | } else { |
Andreas Huber | 0f30bd9 | 2011-06-30 16:52:33 -0700 | [diff] [blame] | 524 | mDurationUs = 0; |
| 525 | for (size_t i = 0; i < mPlaylist->size(); ++i) { |
| 526 | sp<AMessage> itemMeta; |
| 527 | CHECK(mPlaylist->itemAt( |
| 528 | i, NULL /* uri */, &itemMeta)); |
| 529 | |
| 530 | int64_t itemDurationUs; |
| 531 | CHECK(itemMeta->findInt64("durationUs", &itemDurationUs)); |
| 532 | |
| 533 | mDurationUs += itemDurationUs; |
| 534 | } |
Andreas Huber | a44153c | 2010-12-03 16:12:25 -0800 | [diff] [blame] | 535 | } |
| 536 | } |
| 537 | |
| 538 | mLastPlaylistFetchTimeUs = ALooper::GetNowUs(); |
| 539 | } |
| 540 | |
| 541 | int32_t firstSeqNumberInPlaylist; |
| 542 | if (mPlaylist->meta() == NULL || !mPlaylist->meta()->findInt32( |
| 543 | "media-sequence", &firstSeqNumberInPlaylist)) { |
| 544 | firstSeqNumberInPlaylist = 0; |
| 545 | } |
| 546 | |
| 547 | bool explicitDiscontinuity = false; |
Andreas Huber | 22fc52f | 2011-01-05 16:24:27 -0800 | [diff] [blame] | 548 | bool bandwidthChanged = false; |
Andreas Huber | a44153c | 2010-12-03 16:12:25 -0800 | [diff] [blame] | 549 | |
| 550 | if (mSeekTimeUs >= 0) { |
Andreas Huber | 0f30bd9 | 2011-06-30 16:52:33 -0700 | [diff] [blame] | 551 | if (mPlaylist->isComplete()) { |
| 552 | size_t index = 0; |
| 553 | int64_t segmentStartUs = 0; |
| 554 | while (index < mPlaylist->size()) { |
| 555 | sp<AMessage> itemMeta; |
| 556 | CHECK(mPlaylist->itemAt( |
| 557 | index, NULL /* uri */, &itemMeta)); |
Andreas Huber | a44153c | 2010-12-03 16:12:25 -0800 | [diff] [blame] | 558 | |
Andreas Huber | 0f30bd9 | 2011-06-30 16:52:33 -0700 | [diff] [blame] | 559 | int64_t itemDurationUs; |
| 560 | CHECK(itemMeta->findInt64("durationUs", &itemDurationUs)); |
| 561 | |
| 562 | if (mSeekTimeUs < segmentStartUs + itemDurationUs) { |
| 563 | break; |
| 564 | } |
| 565 | |
| 566 | segmentStartUs += itemDurationUs; |
| 567 | ++index; |
| 568 | } |
| 569 | |
| 570 | if (index < mPlaylist->size()) { |
Andreas Huber | 43c3e6c | 2011-01-05 12:17:08 -0800 | [diff] [blame] | 571 | int32_t newSeqNumber = firstSeqNumberInPlaylist + index; |
Andreas Huber | a44153c | 2010-12-03 16:12:25 -0800 | [diff] [blame] | 572 | |
Andreas Huber | 43c3e6c | 2011-01-05 12:17:08 -0800 | [diff] [blame] | 573 | if (newSeqNumber != mSeqNumber) { |
| 574 | LOGI("seeking to seq no %d", newSeqNumber); |
| 575 | |
| 576 | mSeqNumber = newSeqNumber; |
| 577 | |
| 578 | mDataSource->reset(); |
| 579 | |
Andreas Huber | 22fc52f | 2011-01-05 16:24:27 -0800 | [diff] [blame] | 580 | // reseting the data source will have had the |
| 581 | // side effect of discarding any previously queued |
| 582 | // bandwidth change discontinuity. |
| 583 | // Therefore we'll need to treat these explicit |
| 584 | // discontinuities as involving a bandwidth change |
| 585 | // even if they aren't directly. |
Andreas Huber | 43c3e6c | 2011-01-05 12:17:08 -0800 | [diff] [blame] | 586 | explicitDiscontinuity = true; |
Andreas Huber | 22fc52f | 2011-01-05 16:24:27 -0800 | [diff] [blame] | 587 | bandwidthChanged = true; |
Andreas Huber | 43c3e6c | 2011-01-05 12:17:08 -0800 | [diff] [blame] | 588 | } |
Andreas Huber | a44153c | 2010-12-03 16:12:25 -0800 | [diff] [blame] | 589 | } |
| 590 | } |
| 591 | |
| 592 | mSeekTimeUs = -1; |
| 593 | |
| 594 | Mutex::Autolock autoLock(mLock); |
| 595 | mSeekDone = true; |
| 596 | mCondition.broadcast(); |
| 597 | } |
| 598 | |
| 599 | if (mSeqNumber < 0) { |
| 600 | if (mPlaylist->isComplete()) { |
| 601 | mSeqNumber = firstSeqNumberInPlaylist; |
| 602 | } else { |
| 603 | mSeqNumber = firstSeqNumberInPlaylist + mPlaylist->size() / 2; |
| 604 | } |
| 605 | } |
| 606 | |
| 607 | int32_t lastSeqNumberInPlaylist = |
| 608 | firstSeqNumberInPlaylist + (int32_t)mPlaylist->size() - 1; |
| 609 | |
| 610 | if (mSeqNumber < firstSeqNumberInPlaylist |
| 611 | || mSeqNumber > lastSeqNumberInPlaylist) { |
Andreas Huber | 88b7ad4 | 2011-01-19 11:30:43 -0800 | [diff] [blame] | 612 | if (mPrevBandwidthIndex != (ssize_t)bandwidthIndex) { |
Andreas Huber | aea5aff | 2011-01-06 16:32:05 -0800 | [diff] [blame] | 613 | // Go back to the previous bandwidth. |
| 614 | |
| 615 | LOGI("new bandwidth does not have the sequence number " |
| 616 | "we're looking for, switching back to previous bandwidth"); |
| 617 | |
| 618 | mLastPlaylistFetchTimeUs = -1; |
| 619 | bandwidthIndex = mPrevBandwidthIndex; |
| 620 | goto rinse_repeat; |
| 621 | } |
| 622 | |
Andreas Huber | a44153c | 2010-12-03 16:12:25 -0800 | [diff] [blame] | 623 | if (!mPlaylist->isComplete() |
| 624 | && mSeqNumber > lastSeqNumberInPlaylist |
| 625 | && mNumRetries < kMaxNumRetries) { |
| 626 | ++mNumRetries; |
| 627 | |
| 628 | mLastPlaylistFetchTimeUs = -1; |
Andreas Huber | 5bc087c | 2010-12-23 10:27:40 -0800 | [diff] [blame] | 629 | postMonitorQueue(3000000ll); |
Andreas Huber | a44153c | 2010-12-03 16:12:25 -0800 | [diff] [blame] | 630 | return; |
| 631 | } |
| 632 | |
| 633 | LOGE("Cannot find sequence number %d in playlist " |
| 634 | "(contains %d - %d)", |
| 635 | mSeqNumber, firstSeqNumberInPlaylist, |
| 636 | firstSeqNumberInPlaylist + mPlaylist->size() - 1); |
| 637 | |
| 638 | mDataSource->queueEOS(ERROR_END_OF_STREAM); |
| 639 | return; |
| 640 | } |
| 641 | |
| 642 | mNumRetries = 0; |
| 643 | |
| 644 | AString uri; |
| 645 | sp<AMessage> itemMeta; |
| 646 | CHECK(mPlaylist->itemAt( |
| 647 | mSeqNumber - firstSeqNumberInPlaylist, |
| 648 | &uri, |
| 649 | &itemMeta)); |
| 650 | |
| 651 | int32_t val; |
| 652 | if (itemMeta->findInt32("discontinuity", &val) && val != 0) { |
| 653 | explicitDiscontinuity = true; |
| 654 | } |
| 655 | |
| 656 | sp<ABuffer> buffer; |
| 657 | status_t err = fetchFile(uri.c_str(), &buffer); |
Andreas Huber | 6e6b1ca | 2010-12-16 11:31:13 -0800 | [diff] [blame] | 658 | if (err != OK) { |
| 659 | LOGE("failed to fetch .ts segment at url '%s'", uri.c_str()); |
| 660 | mDataSource->queueEOS(err); |
| 661 | return; |
| 662 | } |
Andreas Huber | a44153c | 2010-12-03 16:12:25 -0800 | [diff] [blame] | 663 | |
Andreas Huber | 43c3e6c | 2011-01-05 12:17:08 -0800 | [diff] [blame] | 664 | CHECK(buffer != NULL); |
| 665 | |
Andreas Huber | 88b3489 | 2011-01-19 11:24:39 -0800 | [diff] [blame] | 666 | err = decryptBuffer(mSeqNumber - firstSeqNumberInPlaylist, buffer); |
| 667 | |
| 668 | if (err != OK) { |
| 669 | LOGE("decryptBuffer failed w/ error %d", err); |
| 670 | |
| 671 | mDataSource->queueEOS(err); |
| 672 | return; |
| 673 | } |
Andreas Huber | a44153c | 2010-12-03 16:12:25 -0800 | [diff] [blame] | 674 | |
| 675 | if (buffer->size() == 0 || buffer->data()[0] != 0x47) { |
| 676 | // Not a transport stream??? |
| 677 | |
| 678 | LOGE("This doesn't look like a transport stream..."); |
| 679 | |
Andreas Huber | bc7f5b2 | 2011-01-21 10:15:23 -0800 | [diff] [blame] | 680 | mBandwidthItems.removeAt(bandwidthIndex); |
| 681 | |
| 682 | if (mBandwidthItems.isEmpty()) { |
| 683 | mDataSource->queueEOS(ERROR_UNSUPPORTED); |
| 684 | return; |
| 685 | } |
| 686 | |
| 687 | LOGI("Retrying with a different bandwidth stream."); |
| 688 | |
| 689 | mLastPlaylistFetchTimeUs = -1; |
| 690 | bandwidthIndex = getBandwidthIndex(); |
| 691 | mPrevBandwidthIndex = bandwidthIndex; |
| 692 | mSeqNumber = -1; |
| 693 | |
| 694 | goto rinse_repeat; |
Andreas Huber | a44153c | 2010-12-03 16:12:25 -0800 | [diff] [blame] | 695 | } |
| 696 | |
Andreas Huber | 22fc52f | 2011-01-05 16:24:27 -0800 | [diff] [blame] | 697 | if ((size_t)mPrevBandwidthIndex != bandwidthIndex) { |
| 698 | bandwidthChanged = true; |
| 699 | } |
| 700 | |
| 701 | if (mPrevBandwidthIndex < 0) { |
| 702 | // Don't signal a bandwidth change at the very beginning of |
| 703 | // playback. |
| 704 | bandwidthChanged = false; |
| 705 | } |
Andreas Huber | 3831a06 | 2010-12-21 10:22:33 -0800 | [diff] [blame] | 706 | |
| 707 | if (explicitDiscontinuity || bandwidthChanged) { |
Andreas Huber | a44153c | 2010-12-03 16:12:25 -0800 | [diff] [blame] | 708 | // Signal discontinuity. |
| 709 | |
Andreas Huber | 43c3e6c | 2011-01-05 12:17:08 -0800 | [diff] [blame] | 710 | LOGI("queueing discontinuity (explicit=%d, bandwidthChanged=%d)", |
| 711 | explicitDiscontinuity, bandwidthChanged); |
| 712 | |
Andreas Huber | a44153c | 2010-12-03 16:12:25 -0800 | [diff] [blame] | 713 | sp<ABuffer> tmp = new ABuffer(188); |
| 714 | memset(tmp->data(), 0, tmp->size()); |
Andreas Huber | 3831a06 | 2010-12-21 10:22:33 -0800 | [diff] [blame] | 715 | tmp->data()[1] = bandwidthChanged; |
Andreas Huber | a44153c | 2010-12-03 16:12:25 -0800 | [diff] [blame] | 716 | |
| 717 | mDataSource->queueBuffer(tmp); |
| 718 | } |
| 719 | |
| 720 | mDataSource->queueBuffer(buffer); |
| 721 | |
| 722 | mPrevBandwidthIndex = bandwidthIndex; |
| 723 | ++mSeqNumber; |
| 724 | |
| 725 | postMonitorQueue(); |
| 726 | } |
| 727 | |
| 728 | void LiveSession::onMonitorQueue() { |
| 729 | if (mSeekTimeUs >= 0 |
| 730 | || mDataSource->countQueuedBuffers() < kMaxNumQueuedFragments) { |
| 731 | onDownloadNext(); |
| 732 | } else { |
| 733 | postMonitorQueue(1000000ll); |
| 734 | } |
| 735 | } |
| 736 | |
| 737 | status_t LiveSession::decryptBuffer( |
| 738 | size_t playlistIndex, const sp<ABuffer> &buffer) { |
| 739 | sp<AMessage> itemMeta; |
| 740 | bool found = false; |
| 741 | AString method; |
| 742 | |
| 743 | for (ssize_t i = playlistIndex; i >= 0; --i) { |
| 744 | AString uri; |
| 745 | CHECK(mPlaylist->itemAt(i, &uri, &itemMeta)); |
| 746 | |
| 747 | if (itemMeta->findString("cipher-method", &method)) { |
| 748 | found = true; |
| 749 | break; |
| 750 | } |
| 751 | } |
| 752 | |
| 753 | if (!found) { |
| 754 | method = "NONE"; |
| 755 | } |
| 756 | |
| 757 | if (method == "NONE") { |
| 758 | return OK; |
| 759 | } else if (!(method == "AES-128")) { |
| 760 | LOGE("Unsupported cipher method '%s'", method.c_str()); |
| 761 | return ERROR_UNSUPPORTED; |
| 762 | } |
| 763 | |
| 764 | AString keyURI; |
| 765 | if (!itemMeta->findString("cipher-uri", &keyURI)) { |
| 766 | LOGE("Missing key uri"); |
| 767 | return ERROR_MALFORMED; |
| 768 | } |
| 769 | |
| 770 | ssize_t index = mAESKeyForURI.indexOfKey(keyURI); |
| 771 | |
| 772 | sp<ABuffer> key; |
| 773 | if (index >= 0) { |
| 774 | key = mAESKeyForURI.valueAt(index); |
| 775 | } else { |
| 776 | key = new ABuffer(16); |
| 777 | |
Andreas Huber | 1156dc9 | 2011-03-08 15:59:28 -0800 | [diff] [blame] | 778 | sp<HTTPBase> keySource = |
| 779 | HTTPBase::Create( |
| 780 | (mFlags & kFlagIncognito) |
| 781 | ? HTTPBase::kFlagIncognito |
| 782 | : 0); |
| 783 | |
Andreas Huber | 9b80c2b | 2011-06-30 15:47:02 -0700 | [diff] [blame] | 784 | if (mUIDValid) { |
| 785 | keySource->setUID(mUID); |
| 786 | } |
| 787 | |
Andreas Huber | a44153c | 2010-12-03 16:12:25 -0800 | [diff] [blame] | 788 | status_t err = keySource->connect(keyURI.c_str()); |
| 789 | |
| 790 | if (err == OK) { |
| 791 | size_t offset = 0; |
| 792 | while (offset < 16) { |
| 793 | ssize_t n = keySource->readAt( |
| 794 | offset, key->data() + offset, 16 - offset); |
| 795 | if (n <= 0) { |
| 796 | err = ERROR_IO; |
| 797 | break; |
| 798 | } |
| 799 | |
| 800 | offset += n; |
| 801 | } |
| 802 | } |
| 803 | |
| 804 | if (err != OK) { |
| 805 | LOGE("failed to fetch cipher key from '%s'.", keyURI.c_str()); |
| 806 | return ERROR_IO; |
| 807 | } |
| 808 | |
| 809 | mAESKeyForURI.add(keyURI, key); |
| 810 | } |
| 811 | |
| 812 | AES_KEY aes_key; |
| 813 | if (AES_set_decrypt_key(key->data(), 128, &aes_key) != 0) { |
| 814 | LOGE("failed to set AES decryption key."); |
| 815 | return UNKNOWN_ERROR; |
| 816 | } |
| 817 | |
| 818 | unsigned char aes_ivec[16]; |
| 819 | |
| 820 | AString iv; |
| 821 | if (itemMeta->findString("cipher-iv", &iv)) { |
| 822 | if ((!iv.startsWith("0x") && !iv.startsWith("0X")) |
| 823 | || iv.size() != 16 * 2 + 2) { |
| 824 | LOGE("malformed cipher IV '%s'.", iv.c_str()); |
| 825 | return ERROR_MALFORMED; |
| 826 | } |
| 827 | |
| 828 | memset(aes_ivec, 0, sizeof(aes_ivec)); |
| 829 | for (size_t i = 0; i < 16; ++i) { |
| 830 | char c1 = tolower(iv.c_str()[2 + 2 * i]); |
| 831 | char c2 = tolower(iv.c_str()[3 + 2 * i]); |
| 832 | if (!isxdigit(c1) || !isxdigit(c2)) { |
| 833 | LOGE("malformed cipher IV '%s'.", iv.c_str()); |
| 834 | return ERROR_MALFORMED; |
| 835 | } |
| 836 | uint8_t nibble1 = isdigit(c1) ? c1 - '0' : c1 - 'a' + 10; |
| 837 | uint8_t nibble2 = isdigit(c2) ? c2 - '0' : c2 - 'a' + 10; |
| 838 | |
| 839 | aes_ivec[i] = nibble1 << 4 | nibble2; |
| 840 | } |
| 841 | } else { |
| 842 | memset(aes_ivec, 0, sizeof(aes_ivec)); |
| 843 | aes_ivec[15] = mSeqNumber & 0xff; |
| 844 | aes_ivec[14] = (mSeqNumber >> 8) & 0xff; |
| 845 | aes_ivec[13] = (mSeqNumber >> 16) & 0xff; |
| 846 | aes_ivec[12] = (mSeqNumber >> 24) & 0xff; |
| 847 | } |
| 848 | |
| 849 | AES_cbc_encrypt( |
| 850 | buffer->data(), buffer->data(), buffer->size(), |
| 851 | &aes_key, aes_ivec, AES_DECRYPT); |
| 852 | |
| 853 | // hexdump(buffer->data(), buffer->size()); |
| 854 | |
| 855 | size_t n = buffer->size(); |
| 856 | CHECK_GT(n, 0u); |
| 857 | |
| 858 | size_t pad = buffer->data()[n - 1]; |
| 859 | |
| 860 | CHECK_GT(pad, 0u); |
| 861 | CHECK_LE(pad, 16u); |
| 862 | CHECK_GE((size_t)n, pad); |
| 863 | for (size_t i = 0; i < pad; ++i) { |
| 864 | CHECK_EQ((unsigned)buffer->data()[n - 1 - i], pad); |
| 865 | } |
| 866 | |
| 867 | n -= pad; |
| 868 | |
| 869 | buffer->setRange(buffer->offset(), n); |
| 870 | |
| 871 | return OK; |
| 872 | } |
| 873 | |
| 874 | void LiveSession::postMonitorQueue(int64_t delayUs) { |
| 875 | sp<AMessage> msg = new AMessage(kWhatMonitorQueue, id()); |
| 876 | msg->setInt32("generation", ++mMonitorQueueGeneration); |
| 877 | msg->post(delayUs); |
| 878 | } |
| 879 | |
| 880 | void LiveSession::onSeek(const sp<AMessage> &msg) { |
| 881 | int64_t timeUs; |
| 882 | CHECK(msg->findInt64("timeUs", &timeUs)); |
| 883 | |
| 884 | mSeekTimeUs = timeUs; |
| 885 | postMonitorQueue(); |
| 886 | } |
| 887 | |
| 888 | status_t LiveSession::getDuration(int64_t *durationUs) { |
| 889 | Mutex::Autolock autoLock(mLock); |
| 890 | *durationUs = mDurationUs; |
| 891 | |
| 892 | return OK; |
| 893 | } |
| 894 | |
| 895 | bool LiveSession::isSeekable() { |
| 896 | int64_t durationUs; |
| 897 | return getDuration(&durationUs) == OK && durationUs >= 0; |
| 898 | } |
| 899 | |
| 900 | } // namespace android |
| 901 | |