Andreas Huber | b206319 | 2010-06-10 11:09:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2010 The Android Open Source Project |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | |
Andreas Huber | 9634665 | 2011-01-19 15:07:19 -0800 | [diff] [blame] | 17 | //#define LOG_NDEBUG 0 |
Andreas Huber | b206319 | 2010-06-10 11:09:36 -0700 | [diff] [blame] | 18 | #define LOG_TAG "NuCachedSource2" |
| 19 | #include <utils/Log.h> |
| 20 | |
| 21 | #include "include/NuCachedSource2.h" |
| 22 | |
| 23 | #include <media/stagefright/foundation/ADebug.h> |
| 24 | #include <media/stagefright/foundation/AMessage.h> |
| 25 | #include <media/stagefright/MediaErrors.h> |
| 26 | |
| 27 | namespace android { |
| 28 | |
| 29 | struct PageCache { |
| 30 | PageCache(size_t pageSize); |
| 31 | ~PageCache(); |
| 32 | |
| 33 | struct Page { |
| 34 | void *mData; |
| 35 | size_t mSize; |
| 36 | }; |
| 37 | |
| 38 | Page *acquirePage(); |
| 39 | void releasePage(Page *page); |
| 40 | |
| 41 | void appendPage(Page *page); |
| 42 | size_t releaseFromStart(size_t maxBytes); |
| 43 | |
| 44 | size_t totalSize() const { |
| 45 | return mTotalSize; |
| 46 | } |
| 47 | |
| 48 | void copy(size_t from, void *data, size_t size); |
| 49 | |
| 50 | private: |
| 51 | size_t mPageSize; |
| 52 | size_t mTotalSize; |
| 53 | |
| 54 | List<Page *> mActivePages; |
| 55 | List<Page *> mFreePages; |
| 56 | |
| 57 | void freePages(List<Page *> *list); |
| 58 | |
| 59 | DISALLOW_EVIL_CONSTRUCTORS(PageCache); |
| 60 | }; |
| 61 | |
| 62 | PageCache::PageCache(size_t pageSize) |
| 63 | : mPageSize(pageSize), |
| 64 | mTotalSize(0) { |
| 65 | } |
| 66 | |
| 67 | PageCache::~PageCache() { |
| 68 | freePages(&mActivePages); |
| 69 | freePages(&mFreePages); |
| 70 | } |
| 71 | |
| 72 | void PageCache::freePages(List<Page *> *list) { |
| 73 | List<Page *>::iterator it = list->begin(); |
| 74 | while (it != list->end()) { |
| 75 | Page *page = *it; |
| 76 | |
| 77 | free(page->mData); |
| 78 | delete page; |
| 79 | page = NULL; |
| 80 | |
| 81 | ++it; |
| 82 | } |
| 83 | } |
| 84 | |
| 85 | PageCache::Page *PageCache::acquirePage() { |
| 86 | if (!mFreePages.empty()) { |
| 87 | List<Page *>::iterator it = mFreePages.begin(); |
| 88 | Page *page = *it; |
| 89 | mFreePages.erase(it); |
| 90 | |
| 91 | return page; |
| 92 | } |
| 93 | |
| 94 | Page *page = new Page; |
| 95 | page->mData = malloc(mPageSize); |
| 96 | page->mSize = 0; |
| 97 | |
| 98 | return page; |
| 99 | } |
| 100 | |
| 101 | void PageCache::releasePage(Page *page) { |
| 102 | page->mSize = 0; |
| 103 | mFreePages.push_back(page); |
| 104 | } |
| 105 | |
| 106 | void PageCache::appendPage(Page *page) { |
| 107 | mTotalSize += page->mSize; |
| 108 | mActivePages.push_back(page); |
| 109 | } |
| 110 | |
| 111 | size_t PageCache::releaseFromStart(size_t maxBytes) { |
| 112 | size_t bytesReleased = 0; |
| 113 | |
| 114 | while (maxBytes > 0 && !mActivePages.empty()) { |
| 115 | List<Page *>::iterator it = mActivePages.begin(); |
| 116 | |
| 117 | Page *page = *it; |
| 118 | |
| 119 | if (maxBytes < page->mSize) { |
| 120 | break; |
| 121 | } |
| 122 | |
| 123 | mActivePages.erase(it); |
| 124 | |
| 125 | maxBytes -= page->mSize; |
| 126 | bytesReleased += page->mSize; |
| 127 | |
| 128 | releasePage(page); |
| 129 | } |
| 130 | |
| 131 | mTotalSize -= bytesReleased; |
| 132 | return bytesReleased; |
| 133 | } |
| 134 | |
| 135 | void PageCache::copy(size_t from, void *data, size_t size) { |
Andreas Huber | 6e3fa44 | 2010-09-21 13:13:15 -0700 | [diff] [blame] | 136 | LOGV("copy from %d size %d", from, size); |
Andreas Huber | b206319 | 2010-06-10 11:09:36 -0700 | [diff] [blame] | 137 | |
Andreas Huber | e2c32e9 | 2011-03-21 14:16:03 -0700 | [diff] [blame] | 138 | if (size == 0) { |
| 139 | return; |
| 140 | } |
| 141 | |
Andreas Huber | b206319 | 2010-06-10 11:09:36 -0700 | [diff] [blame] | 142 | CHECK_LE(from + size, mTotalSize); |
| 143 | |
| 144 | size_t offset = 0; |
| 145 | List<Page *>::iterator it = mActivePages.begin(); |
| 146 | while (from >= offset + (*it)->mSize) { |
| 147 | offset += (*it)->mSize; |
| 148 | ++it; |
| 149 | } |
| 150 | |
| 151 | size_t delta = from - offset; |
| 152 | size_t avail = (*it)->mSize - delta; |
| 153 | |
| 154 | if (avail >= size) { |
| 155 | memcpy(data, (const uint8_t *)(*it)->mData + delta, size); |
| 156 | return; |
| 157 | } |
| 158 | |
| 159 | memcpy(data, (const uint8_t *)(*it)->mData + delta, avail); |
| 160 | ++it; |
| 161 | data = (uint8_t *)data + avail; |
| 162 | size -= avail; |
| 163 | |
| 164 | while (size > 0) { |
| 165 | size_t copy = (*it)->mSize; |
| 166 | if (copy > size) { |
| 167 | copy = size; |
| 168 | } |
| 169 | memcpy(data, (*it)->mData, copy); |
| 170 | data = (uint8_t *)data + copy; |
| 171 | size -= copy; |
| 172 | ++it; |
| 173 | } |
| 174 | } |
| 175 | |
| 176 | //////////////////////////////////////////////////////////////////////////////// |
| 177 | |
| 178 | NuCachedSource2::NuCachedSource2(const sp<DataSource> &source) |
| 179 | : mSource(source), |
| 180 | mReflector(new AHandlerReflector<NuCachedSource2>(this)), |
| 181 | mLooper(new ALooper), |
| 182 | mCache(new PageCache(kPageSize)), |
| 183 | mCacheOffset(0), |
| 184 | mFinalStatus(OK), |
| 185 | mLastAccessPos(0), |
Andreas Huber | a4867540 | 2010-06-22 08:57:34 -0700 | [diff] [blame] | 186 | mFetching(true), |
Andreas Huber | b559084 | 2010-12-03 16:12:25 -0800 | [diff] [blame] | 187 | mLastFetchTimeUs(-1) { |
Andreas Huber | c4e0b70 | 2010-08-27 15:21:07 -0700 | [diff] [blame] | 188 | mLooper->setName("NuCachedSource2"); |
Andreas Huber | b206319 | 2010-06-10 11:09:36 -0700 | [diff] [blame] | 189 | mLooper->registerHandler(mReflector); |
| 190 | mLooper->start(); |
| 191 | |
| 192 | Mutex::Autolock autoLock(mLock); |
| 193 | (new AMessage(kWhatFetchMore, mReflector->id()))->post(); |
| 194 | } |
| 195 | |
| 196 | NuCachedSource2::~NuCachedSource2() { |
| 197 | mLooper->stop(); |
| 198 | mLooper->unregisterHandler(mReflector->id()); |
| 199 | |
| 200 | delete mCache; |
| 201 | mCache = NULL; |
| 202 | } |
| 203 | |
| 204 | status_t NuCachedSource2::initCheck() const { |
| 205 | return mSource->initCheck(); |
| 206 | } |
| 207 | |
James Dong | b1262a8 | 2010-11-16 14:04:54 -0800 | [diff] [blame] | 208 | status_t NuCachedSource2::getSize(off64_t *size) { |
Andreas Huber | b206319 | 2010-06-10 11:09:36 -0700 | [diff] [blame] | 209 | return mSource->getSize(size); |
| 210 | } |
| 211 | |
| 212 | uint32_t NuCachedSource2::flags() { |
Andreas Huber | 54d0972 | 2010-10-12 11:34:37 -0700 | [diff] [blame] | 213 | return (mSource->flags() & ~kWantsPrefetching) | kIsCachingDataSource; |
Andreas Huber | b206319 | 2010-06-10 11:09:36 -0700 | [diff] [blame] | 214 | } |
| 215 | |
| 216 | void NuCachedSource2::onMessageReceived(const sp<AMessage> &msg) { |
| 217 | switch (msg->what()) { |
| 218 | case kWhatFetchMore: |
| 219 | { |
| 220 | onFetch(); |
| 221 | break; |
| 222 | } |
| 223 | |
| 224 | case kWhatRead: |
| 225 | { |
| 226 | onRead(msg); |
| 227 | break; |
| 228 | } |
| 229 | |
| 230 | default: |
| 231 | TRESPASS(); |
| 232 | } |
| 233 | } |
| 234 | |
| 235 | void NuCachedSource2::fetchInternal() { |
Andreas Huber | 6e3fa44 | 2010-09-21 13:13:15 -0700 | [diff] [blame] | 236 | LOGV("fetchInternal"); |
Andreas Huber | b206319 | 2010-06-10 11:09:36 -0700 | [diff] [blame] | 237 | |
| 238 | CHECK_EQ(mFinalStatus, (status_t)OK); |
| 239 | |
| 240 | PageCache::Page *page = mCache->acquirePage(); |
| 241 | |
| 242 | ssize_t n = mSource->readAt( |
| 243 | mCacheOffset + mCache->totalSize(), page->mData, kPageSize); |
| 244 | |
| 245 | Mutex::Autolock autoLock(mLock); |
| 246 | |
| 247 | if (n < 0) { |
Andreas Huber | 6e3fa44 | 2010-09-21 13:13:15 -0700 | [diff] [blame] | 248 | LOGE("source returned error %ld", n); |
Andreas Huber | b206319 | 2010-06-10 11:09:36 -0700 | [diff] [blame] | 249 | mFinalStatus = n; |
| 250 | mCache->releasePage(page); |
| 251 | } else if (n == 0) { |
Andreas Huber | 6e3fa44 | 2010-09-21 13:13:15 -0700 | [diff] [blame] | 252 | LOGI("ERROR_END_OF_STREAM"); |
Andreas Huber | b206319 | 2010-06-10 11:09:36 -0700 | [diff] [blame] | 253 | mFinalStatus = ERROR_END_OF_STREAM; |
| 254 | mCache->releasePage(page); |
| 255 | } else { |
| 256 | page->mSize = n; |
| 257 | mCache->appendPage(page); |
| 258 | } |
| 259 | } |
| 260 | |
| 261 | void NuCachedSource2::onFetch() { |
Andreas Huber | 6e3fa44 | 2010-09-21 13:13:15 -0700 | [diff] [blame] | 262 | LOGV("onFetch"); |
Andreas Huber | b206319 | 2010-06-10 11:09:36 -0700 | [diff] [blame] | 263 | |
| 264 | if (mFinalStatus != OK) { |
Andreas Huber | 6e3fa44 | 2010-09-21 13:13:15 -0700 | [diff] [blame] | 265 | LOGV("EOS reached, done prefetching for now"); |
Andreas Huber | b206319 | 2010-06-10 11:09:36 -0700 | [diff] [blame] | 266 | mFetching = false; |
| 267 | } |
| 268 | |
Andreas Huber | a4867540 | 2010-06-22 08:57:34 -0700 | [diff] [blame] | 269 | bool keepAlive = |
| 270 | !mFetching |
| 271 | && mFinalStatus == OK |
| 272 | && ALooper::GetNowUs() >= mLastFetchTimeUs + kKeepAliveIntervalUs; |
| 273 | |
| 274 | if (mFetching || keepAlive) { |
| 275 | if (keepAlive) { |
Andreas Huber | 6e3fa44 | 2010-09-21 13:13:15 -0700 | [diff] [blame] | 276 | LOGI("Keep alive"); |
Andreas Huber | a4867540 | 2010-06-22 08:57:34 -0700 | [diff] [blame] | 277 | } |
| 278 | |
Andreas Huber | b206319 | 2010-06-10 11:09:36 -0700 | [diff] [blame] | 279 | fetchInternal(); |
| 280 | |
Andreas Huber | a4867540 | 2010-06-22 08:57:34 -0700 | [diff] [blame] | 281 | mLastFetchTimeUs = ALooper::GetNowUs(); |
| 282 | |
| 283 | if (mFetching && mCache->totalSize() >= kHighWaterThreshold) { |
Andreas Huber | 6e3fa44 | 2010-09-21 13:13:15 -0700 | [diff] [blame] | 284 | LOGI("Cache full, done prefetching for now"); |
Andreas Huber | b206319 | 2010-06-10 11:09:36 -0700 | [diff] [blame] | 285 | mFetching = false; |
| 286 | } |
Andreas Huber | b559084 | 2010-12-03 16:12:25 -0800 | [diff] [blame] | 287 | } else { |
Andreas Huber | 9e93726 | 2010-06-11 14:14:52 -0700 | [diff] [blame] | 288 | Mutex::Autolock autoLock(mLock); |
Andreas Huber | b206319 | 2010-06-10 11:09:36 -0700 | [diff] [blame] | 289 | restartPrefetcherIfNecessary_l(); |
| 290 | } |
| 291 | |
| 292 | (new AMessage(kWhatFetchMore, mReflector->id()))->post( |
| 293 | mFetching ? 0 : 100000ll); |
| 294 | } |
| 295 | |
| 296 | void NuCachedSource2::onRead(const sp<AMessage> &msg) { |
Andreas Huber | 6e3fa44 | 2010-09-21 13:13:15 -0700 | [diff] [blame] | 297 | LOGV("onRead"); |
Andreas Huber | b206319 | 2010-06-10 11:09:36 -0700 | [diff] [blame] | 298 | |
| 299 | int64_t offset; |
| 300 | CHECK(msg->findInt64("offset", &offset)); |
| 301 | |
| 302 | void *data; |
| 303 | CHECK(msg->findPointer("data", &data)); |
| 304 | |
| 305 | size_t size; |
| 306 | CHECK(msg->findSize("size", &size)); |
| 307 | |
| 308 | ssize_t result = readInternal(offset, data, size); |
| 309 | |
| 310 | if (result == -EAGAIN) { |
| 311 | msg->post(50000); |
| 312 | return; |
| 313 | } |
| 314 | |
| 315 | Mutex::Autolock autoLock(mLock); |
| 316 | |
| 317 | CHECK(mAsyncResult == NULL); |
| 318 | |
| 319 | mAsyncResult = new AMessage; |
| 320 | mAsyncResult->setInt32("result", result); |
| 321 | |
| 322 | mCondition.signal(); |
| 323 | } |
| 324 | |
Andreas Huber | 10b920c | 2010-11-11 15:37:17 -0800 | [diff] [blame] | 325 | void NuCachedSource2::restartPrefetcherIfNecessary_l( |
| 326 | bool ignoreLowWaterThreshold) { |
James Dong | ac0e4bd | 2011-01-14 15:15:12 -0800 | [diff] [blame] | 327 | static const size_t kGrayArea = 1024 * 1024; |
Andreas Huber | b206319 | 2010-06-10 11:09:36 -0700 | [diff] [blame] | 328 | |
| 329 | if (mFetching || mFinalStatus != OK) { |
| 330 | return; |
| 331 | } |
| 332 | |
Andreas Huber | 10b920c | 2010-11-11 15:37:17 -0800 | [diff] [blame] | 333 | if (!ignoreLowWaterThreshold |
| 334 | && mCacheOffset + mCache->totalSize() - mLastAccessPos |
| 335 | >= kLowWaterThreshold) { |
Andreas Huber | b206319 | 2010-06-10 11:09:36 -0700 | [diff] [blame] | 336 | return; |
| 337 | } |
| 338 | |
| 339 | size_t maxBytes = mLastAccessPos - mCacheOffset; |
| 340 | if (maxBytes < kGrayArea) { |
| 341 | return; |
| 342 | } |
| 343 | |
| 344 | maxBytes -= kGrayArea; |
| 345 | |
| 346 | size_t actualBytes = mCache->releaseFromStart(maxBytes); |
| 347 | mCacheOffset += actualBytes; |
| 348 | |
Andreas Huber | 6e3fa44 | 2010-09-21 13:13:15 -0700 | [diff] [blame] | 349 | LOGI("restarting prefetcher, totalSize = %d", mCache->totalSize()); |
Andreas Huber | b206319 | 2010-06-10 11:09:36 -0700 | [diff] [blame] | 350 | mFetching = true; |
| 351 | } |
| 352 | |
James Dong | b1262a8 | 2010-11-16 14:04:54 -0800 | [diff] [blame] | 353 | ssize_t NuCachedSource2::readAt(off64_t offset, void *data, size_t size) { |
Andreas Huber | b206319 | 2010-06-10 11:09:36 -0700 | [diff] [blame] | 354 | Mutex::Autolock autoSerializer(mSerializer); |
| 355 | |
Andreas Huber | 52c7832 | 2011-01-11 15:05:28 -0800 | [diff] [blame] | 356 | LOGV("readAt offset %lld, size %d", offset, size); |
Andreas Huber | b206319 | 2010-06-10 11:09:36 -0700 | [diff] [blame] | 357 | |
| 358 | Mutex::Autolock autoLock(mLock); |
| 359 | |
| 360 | // If the request can be completely satisfied from the cache, do so. |
| 361 | |
| 362 | if (offset >= mCacheOffset |
| 363 | && offset + size <= mCacheOffset + mCache->totalSize()) { |
| 364 | size_t delta = offset - mCacheOffset; |
| 365 | mCache->copy(delta, data, size); |
| 366 | |
| 367 | mLastAccessPos = offset + size; |
| 368 | |
| 369 | return size; |
| 370 | } |
| 371 | |
| 372 | sp<AMessage> msg = new AMessage(kWhatRead, mReflector->id()); |
| 373 | msg->setInt64("offset", offset); |
| 374 | msg->setPointer("data", data); |
| 375 | msg->setSize("size", size); |
| 376 | |
| 377 | CHECK(mAsyncResult == NULL); |
| 378 | msg->post(); |
| 379 | |
| 380 | while (mAsyncResult == NULL) { |
| 381 | mCondition.wait(mLock); |
| 382 | } |
| 383 | |
| 384 | int32_t result; |
| 385 | CHECK(mAsyncResult->findInt32("result", &result)); |
| 386 | |
| 387 | mAsyncResult.clear(); |
| 388 | |
| 389 | if (result > 0) { |
| 390 | mLastAccessPos = offset + result; |
| 391 | } |
| 392 | |
| 393 | return (ssize_t)result; |
| 394 | } |
| 395 | |
| 396 | size_t NuCachedSource2::cachedSize() { |
| 397 | Mutex::Autolock autoLock(mLock); |
| 398 | return mCacheOffset + mCache->totalSize(); |
| 399 | } |
| 400 | |
Bryan Mawhinney | e26275b | 2011-01-18 19:12:21 +0000 | [diff] [blame] | 401 | size_t NuCachedSource2::approxDataRemaining(status_t *finalStatus) { |
Andreas Huber | b206319 | 2010-06-10 11:09:36 -0700 | [diff] [blame] | 402 | Mutex::Autolock autoLock(mLock); |
Bryan Mawhinney | e26275b | 2011-01-18 19:12:21 +0000 | [diff] [blame] | 403 | return approxDataRemaining_l(finalStatus); |
Andreas Huber | b206319 | 2010-06-10 11:09:36 -0700 | [diff] [blame] | 404 | } |
| 405 | |
Bryan Mawhinney | e26275b | 2011-01-18 19:12:21 +0000 | [diff] [blame] | 406 | size_t NuCachedSource2::approxDataRemaining_l(status_t *finalStatus) { |
| 407 | *finalStatus = mFinalStatus; |
James Dong | b1262a8 | 2010-11-16 14:04:54 -0800 | [diff] [blame] | 408 | off64_t lastBytePosCached = mCacheOffset + mCache->totalSize(); |
Andreas Huber | b206319 | 2010-06-10 11:09:36 -0700 | [diff] [blame] | 409 | if (mLastAccessPos < lastBytePosCached) { |
| 410 | return lastBytePosCached - mLastAccessPos; |
| 411 | } |
| 412 | return 0; |
| 413 | } |
| 414 | |
James Dong | b1262a8 | 2010-11-16 14:04:54 -0800 | [diff] [blame] | 415 | ssize_t NuCachedSource2::readInternal(off64_t offset, void *data, size_t size) { |
Andreas Huber | 52c7832 | 2011-01-11 15:05:28 -0800 | [diff] [blame] | 416 | LOGV("readInternal offset %lld size %d", offset, size); |
Andreas Huber | b206319 | 2010-06-10 11:09:36 -0700 | [diff] [blame] | 417 | |
| 418 | Mutex::Autolock autoLock(mLock); |
| 419 | |
| 420 | if (offset < mCacheOffset |
James Dong | b1262a8 | 2010-11-16 14:04:54 -0800 | [diff] [blame] | 421 | || offset >= (off64_t)(mCacheOffset + mCache->totalSize())) { |
James Dong | ac0e4bd | 2011-01-14 15:15:12 -0800 | [diff] [blame] | 422 | static const off64_t kPadding = 256 * 1024; |
Andreas Huber | b206319 | 2010-06-10 11:09:36 -0700 | [diff] [blame] | 423 | |
| 424 | // In the presence of multiple decoded streams, once of them will |
| 425 | // trigger this seek request, the other one will request data "nearby" |
| 426 | // soon, adjust the seek position so that that subsequent request |
| 427 | // does not trigger another seek. |
James Dong | b1262a8 | 2010-11-16 14:04:54 -0800 | [diff] [blame] | 428 | off64_t seekOffset = (offset > kPadding) ? offset - kPadding : 0; |
Andreas Huber | b206319 | 2010-06-10 11:09:36 -0700 | [diff] [blame] | 429 | |
| 430 | seekInternal_l(seekOffset); |
| 431 | } |
| 432 | |
| 433 | size_t delta = offset - mCacheOffset; |
| 434 | |
| 435 | if (mFinalStatus != OK) { |
| 436 | if (delta >= mCache->totalSize()) { |
| 437 | return mFinalStatus; |
| 438 | } |
| 439 | |
Andreas Huber | e577e87 | 2010-06-11 09:22:48 -0700 | [diff] [blame] | 440 | size_t avail = mCache->totalSize() - delta; |
Andreas Huber | b206319 | 2010-06-10 11:09:36 -0700 | [diff] [blame] | 441 | mCache->copy(delta, data, avail); |
| 442 | |
| 443 | return avail; |
| 444 | } |
| 445 | |
| 446 | if (offset + size <= mCacheOffset + mCache->totalSize()) { |
| 447 | mCache->copy(delta, data, size); |
| 448 | |
| 449 | return size; |
| 450 | } |
| 451 | |
Andreas Huber | 6e3fa44 | 2010-09-21 13:13:15 -0700 | [diff] [blame] | 452 | LOGV("deferring read"); |
Andreas Huber | b206319 | 2010-06-10 11:09:36 -0700 | [diff] [blame] | 453 | |
| 454 | return -EAGAIN; |
| 455 | } |
| 456 | |
James Dong | b1262a8 | 2010-11-16 14:04:54 -0800 | [diff] [blame] | 457 | status_t NuCachedSource2::seekInternal_l(off64_t offset) { |
Andreas Huber | b206319 | 2010-06-10 11:09:36 -0700 | [diff] [blame] | 458 | mLastAccessPos = offset; |
| 459 | |
| 460 | if (offset >= mCacheOffset |
James Dong | b1262a8 | 2010-11-16 14:04:54 -0800 | [diff] [blame] | 461 | && offset <= (off64_t)(mCacheOffset + mCache->totalSize())) { |
Andreas Huber | b206319 | 2010-06-10 11:09:36 -0700 | [diff] [blame] | 462 | return OK; |
| 463 | } |
| 464 | |
Andreas Huber | 783f683 | 2010-11-19 10:08:23 -0800 | [diff] [blame] | 465 | LOGI("new range: offset= %lld", offset); |
Andreas Huber | b206319 | 2010-06-10 11:09:36 -0700 | [diff] [blame] | 466 | |
| 467 | mCacheOffset = offset; |
| 468 | |
| 469 | size_t totalSize = mCache->totalSize(); |
| 470 | CHECK_EQ(mCache->releaseFromStart(totalSize), totalSize); |
| 471 | |
| 472 | mFinalStatus = OK; |
| 473 | mFetching = true; |
| 474 | |
| 475 | return OK; |
| 476 | } |
| 477 | |
Andreas Huber | 10b920c | 2010-11-11 15:37:17 -0800 | [diff] [blame] | 478 | void NuCachedSource2::resumeFetchingIfNecessary() { |
| 479 | Mutex::Autolock autoLock(mLock); |
| 480 | |
| 481 | restartPrefetcherIfNecessary_l(true /* ignore low water threshold */); |
| 482 | } |
| 483 | |
Gloria Wang | c2dc472 | 2011-02-07 11:41:11 -0800 | [diff] [blame] | 484 | DecryptHandle* NuCachedSource2::DrmInitialization() { |
| 485 | return mSource->DrmInitialization(); |
Gloria Wang | c2c22e7 | 2010-11-01 15:53:16 -0700 | [diff] [blame] | 486 | } |
| 487 | |
| 488 | void NuCachedSource2::getDrmInfo(DecryptHandle **handle, DrmManagerClient **client) { |
| 489 | mSource->getDrmInfo(handle, client); |
| 490 | } |
| 491 | |
Gloria Wang | 43cd12d | 2010-11-09 15:06:51 -0800 | [diff] [blame] | 492 | String8 NuCachedSource2::getUri() { |
| 493 | return mSource->getUri(); |
| 494 | } |
Andreas Huber | 9634665 | 2011-01-19 15:07:19 -0800 | [diff] [blame] | 495 | |
Andreas Huber | b206319 | 2010-06-10 11:09:36 -0700 | [diff] [blame] | 496 | } // namespace android |