NuCachedSource2.cpp revision 6f5aae1bcba130d5b8092a19fca3627aa565df56
15994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber/* 25994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber * Copyright (C) 2010 The Android Open Source Project 35994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber * 45994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber * Licensed under the Apache License, Version 2.0 (the "License"); 55994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber * you may not use this file except in compliance with the License. 65994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber * You may obtain a copy of the License at 75994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber * 85994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber * http://www.apache.org/licenses/LICENSE-2.0 95994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber * 105994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber * Unless required by applicable law or agreed to in writing, software 115994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber * distributed under the License is distributed on an "AS IS" BASIS, 125994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 135994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber * See the License for the specific language governing permissions and 145994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber * limitations under the License. 155994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber */ 165994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber 175994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber#define LOG_TAG "NuCachedSource2" 185994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber#include <utils/Log.h> 195994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber 205994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber#include "include/NuCachedSource2.h" 215994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber 225994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber#include <media/stagefright/foundation/ADebug.h> 235994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber#include <media/stagefright/foundation/AMessage.h> 245994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber#include <media/stagefright/MediaErrors.h> 255994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber 265994b4798b01f3dd340577c9ea9657f09093a770Andreas Hubernamespace android { 275994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber 285994b4798b01f3dd340577c9ea9657f09093a770Andreas Huberstruct PageCache { 295994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber PageCache(size_t pageSize); 305994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber ~PageCache(); 315994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber 325994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber struct Page { 335994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber void *mData; 345994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber size_t mSize; 355994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber }; 365994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber 375994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber Page *acquirePage(); 385994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber void releasePage(Page *page); 395994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber 405994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber void appendPage(Page *page); 415994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber size_t releaseFromStart(size_t maxBytes); 425994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber 435994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber size_t totalSize() const { 445994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber return mTotalSize; 455994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber } 465994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber 475994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber void copy(size_t from, void *data, size_t size); 485994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber 495994b4798b01f3dd340577c9ea9657f09093a770Andreas Huberprivate: 505994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber size_t mPageSize; 515994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber size_t mTotalSize; 525994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber 535994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber List<Page *> mActivePages; 545994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber List<Page *> mFreePages; 555994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber 565994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber void freePages(List<Page *> *list); 575994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber 585994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber DISALLOW_EVIL_CONSTRUCTORS(PageCache); 595994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber}; 605994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber 615994b4798b01f3dd340577c9ea9657f09093a770Andreas HuberPageCache::PageCache(size_t pageSize) 625994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber : mPageSize(pageSize), 635994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber mTotalSize(0) { 645994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber} 655994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber 665994b4798b01f3dd340577c9ea9657f09093a770Andreas HuberPageCache::~PageCache() { 675994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber freePages(&mActivePages); 685994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber freePages(&mFreePages); 695994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber} 705994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber 715994b4798b01f3dd340577c9ea9657f09093a770Andreas Hubervoid PageCache::freePages(List<Page *> *list) { 725994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber List<Page *>::iterator it = list->begin(); 735994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber while (it != list->end()) { 745994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber Page *page = *it; 755994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber 765994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber free(page->mData); 775994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber delete page; 785994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber page = NULL; 795994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber 805994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber ++it; 815994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber } 825994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber} 835994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber 845994b4798b01f3dd340577c9ea9657f09093a770Andreas HuberPageCache::Page *PageCache::acquirePage() { 855994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber if (!mFreePages.empty()) { 865994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber List<Page *>::iterator it = mFreePages.begin(); 875994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber Page *page = *it; 885994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber mFreePages.erase(it); 895994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber 905994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber return page; 915994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber } 925994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber 935994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber Page *page = new Page; 945994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber page->mData = malloc(mPageSize); 955994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber page->mSize = 0; 965994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber 975994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber return page; 985994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber} 995994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber 1005994b4798b01f3dd340577c9ea9657f09093a770Andreas Hubervoid PageCache::releasePage(Page *page) { 1015994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber page->mSize = 0; 1025994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber mFreePages.push_back(page); 1035994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber} 1045994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber 1055994b4798b01f3dd340577c9ea9657f09093a770Andreas Hubervoid PageCache::appendPage(Page *page) { 1065994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber mTotalSize += page->mSize; 1075994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber mActivePages.push_back(page); 1085994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber} 1095994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber 1105994b4798b01f3dd340577c9ea9657f09093a770Andreas Hubersize_t PageCache::releaseFromStart(size_t maxBytes) { 1115994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber size_t bytesReleased = 0; 1125994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber 1135994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber while (maxBytes > 0 && !mActivePages.empty()) { 1145994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber List<Page *>::iterator it = mActivePages.begin(); 1155994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber 1165994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber Page *page = *it; 1175994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber 1185994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber if (maxBytes < page->mSize) { 1195994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber break; 1205994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber } 1215994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber 1225994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber mActivePages.erase(it); 1235994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber 1245994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber maxBytes -= page->mSize; 1255994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber bytesReleased += page->mSize; 1265994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber 1275994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber releasePage(page); 1285994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber } 1295994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber 1305994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber mTotalSize -= bytesReleased; 1315994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber return bytesReleased; 1325994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber} 1335994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber 1345994b4798b01f3dd340577c9ea9657f09093a770Andreas Hubervoid PageCache::copy(size_t from, void *data, size_t size) { 1355994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber LOG(VERBOSE) << "copy from " << from << " size " << size; 1365994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber 1375994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber CHECK_LE(from + size, mTotalSize); 1385994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber 1395994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber size_t offset = 0; 1405994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber List<Page *>::iterator it = mActivePages.begin(); 1415994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber while (from >= offset + (*it)->mSize) { 1425994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber offset += (*it)->mSize; 1435994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber ++it; 1445994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber } 1455994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber 1465994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber size_t delta = from - offset; 1475994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber size_t avail = (*it)->mSize - delta; 1485994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber 1495994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber if (avail >= size) { 1505994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber memcpy(data, (const uint8_t *)(*it)->mData + delta, size); 1515994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber return; 1525994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber } 1535994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber 1545994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber memcpy(data, (const uint8_t *)(*it)->mData + delta, avail); 1555994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber ++it; 1565994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber data = (uint8_t *)data + avail; 1575994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber size -= avail; 1585994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber 1595994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber while (size > 0) { 1605994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber size_t copy = (*it)->mSize; 1615994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber if (copy > size) { 1625994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber copy = size; 1635994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber } 1645994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber memcpy(data, (*it)->mData, copy); 1655994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber data = (uint8_t *)data + copy; 1665994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber size -= copy; 1675994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber ++it; 1685994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber } 1695994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber} 1705994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber 1715994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber//////////////////////////////////////////////////////////////////////////////// 1725994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber 1735994b4798b01f3dd340577c9ea9657f09093a770Andreas HuberNuCachedSource2::NuCachedSource2(const sp<DataSource> &source) 1745994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber : mSource(source), 1755994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber mReflector(new AHandlerReflector<NuCachedSource2>(this)), 1765994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber mLooper(new ALooper), 1775994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber mCache(new PageCache(kPageSize)), 1785994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber mCacheOffset(0), 1795994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber mFinalStatus(OK), 1805994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber mLastAccessPos(0), 1815994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber mFetching(true) { 1825994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber mLooper->registerHandler(mReflector); 1835994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber mLooper->start(); 1845994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber 1855994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber Mutex::Autolock autoLock(mLock); 1865994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber (new AMessage(kWhatFetchMore, mReflector->id()))->post(); 1875994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber} 1885994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber 1895994b4798b01f3dd340577c9ea9657f09093a770Andreas HuberNuCachedSource2::~NuCachedSource2() { 1905994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber mLooper->stop(); 1915994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber mLooper->unregisterHandler(mReflector->id()); 1925994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber 1935994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber delete mCache; 1945994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber mCache = NULL; 1955994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber} 1965994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber 1975994b4798b01f3dd340577c9ea9657f09093a770Andreas Huberstatus_t NuCachedSource2::initCheck() const { 1985994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber return mSource->initCheck(); 1995994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber} 2005994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber 2015994b4798b01f3dd340577c9ea9657f09093a770Andreas Huberstatus_t NuCachedSource2::getSize(off_t *size) { 2025994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber return mSource->getSize(size); 2035994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber} 2045994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber 2055994b4798b01f3dd340577c9ea9657f09093a770Andreas Huberuint32_t NuCachedSource2::flags() { 2065994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber return mSource->flags(); 2075994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber} 2085994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber 2095994b4798b01f3dd340577c9ea9657f09093a770Andreas Hubervoid NuCachedSource2::onMessageReceived(const sp<AMessage> &msg) { 2105994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber switch (msg->what()) { 2115994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber case kWhatFetchMore: 2125994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber { 2135994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber onFetch(); 2145994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber break; 2155994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber } 2165994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber 2175994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber case kWhatRead: 2185994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber { 2195994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber onRead(msg); 2205994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber break; 2215994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber } 2225994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber 2235994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber default: 2245994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber TRESPASS(); 2255994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber } 2265994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber} 2275994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber 2285994b4798b01f3dd340577c9ea9657f09093a770Andreas Hubervoid NuCachedSource2::fetchInternal() { 2295994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber LOG(VERBOSE) << "fetchInternal"; 2305994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber 2315994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber CHECK_EQ(mFinalStatus, (status_t)OK); 2325994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber 2335994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber PageCache::Page *page = mCache->acquirePage(); 2345994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber 2355994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber ssize_t n = mSource->readAt( 2365994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber mCacheOffset + mCache->totalSize(), page->mData, kPageSize); 2375994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber 2385994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber Mutex::Autolock autoLock(mLock); 2395994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber 2405994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber if (n < 0) { 2415994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber LOG(ERROR) << "source returned error " << n; 2425994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber mFinalStatus = n; 2435994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber mCache->releasePage(page); 2445994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber } else if (n == 0) { 2455994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber LOG(INFO) << "ERROR_END_OF_STREAM"; 2465994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber mFinalStatus = ERROR_END_OF_STREAM; 2475994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber mCache->releasePage(page); 2485994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber } else { 2495994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber page->mSize = n; 2505994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber mCache->appendPage(page); 2515994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber } 2525994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber} 2535994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber 2545994b4798b01f3dd340577c9ea9657f09093a770Andreas Hubervoid NuCachedSource2::onFetch() { 2555994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber LOG(VERBOSE) << "onFetch"; 2565994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber 2575994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber if (mFinalStatus != OK) { 2585994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber LOG(VERBOSE) << "EOS reached, done prefetching for now"; 2595994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber mFetching = false; 2605994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber } 2615994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber 2625994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber if (mFetching) { 2635994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber fetchInternal(); 2645994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber 2655994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber if (mCache->totalSize() >= kHighWaterThreshold) { 2665994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber LOG(INFO) << "Cache full, done prefetching for now"; 2675994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber mFetching = false; 2685994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber } 2695994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber } else { 2705994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber restartPrefetcherIfNecessary_l(); 2715994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber } 2725994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber 2735994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber (new AMessage(kWhatFetchMore, mReflector->id()))->post( 2745994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber mFetching ? 0 : 100000ll); 2755994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber} 2765994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber 2775994b4798b01f3dd340577c9ea9657f09093a770Andreas Hubervoid NuCachedSource2::onRead(const sp<AMessage> &msg) { 2785994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber LOG(VERBOSE) << "onRead"; 2795994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber 2805994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber int64_t offset; 2815994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber CHECK(msg->findInt64("offset", &offset)); 2825994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber 2835994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber void *data; 2845994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber CHECK(msg->findPointer("data", &data)); 2855994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber 2865994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber size_t size; 2875994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber CHECK(msg->findSize("size", &size)); 2885994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber 2895994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber ssize_t result = readInternal(offset, data, size); 2905994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber 2915994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber if (result == -EAGAIN) { 2925994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber msg->post(50000); 2935994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber return; 2945994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber } 2955994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber 2965994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber Mutex::Autolock autoLock(mLock); 2975994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber 2985994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber CHECK(mAsyncResult == NULL); 2995994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber 3005994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber mAsyncResult = new AMessage; 3015994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber mAsyncResult->setInt32("result", result); 3025994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber 3035994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber mCondition.signal(); 3045994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber} 3055994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber 3065994b4798b01f3dd340577c9ea9657f09093a770Andreas Hubervoid NuCachedSource2::restartPrefetcherIfNecessary_l() { 3075994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber static const size_t kGrayArea = 256 * 1024; 3085994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber 3095994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber if (mFetching || mFinalStatus != OK) { 3105994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber return; 3115994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber } 3125994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber 3135994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber if (mCacheOffset + mCache->totalSize() - mLastAccessPos 3145994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber >= kLowWaterThreshold) { 3155994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber return; 3165994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber } 3175994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber 3185994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber size_t maxBytes = mLastAccessPos - mCacheOffset; 3195994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber if (maxBytes < kGrayArea) { 3205994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber return; 3215994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber } 3225994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber 3235994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber maxBytes -= kGrayArea; 3245994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber 3255994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber size_t actualBytes = mCache->releaseFromStart(maxBytes); 3265994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber mCacheOffset += actualBytes; 3275994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber 3285994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber LOG(INFO) << "restarting prefetcher, totalSize = " << mCache->totalSize(); 3295994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber mFetching = true; 3305994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber} 3315994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber 3325994b4798b01f3dd340577c9ea9657f09093a770Andreas Huberssize_t NuCachedSource2::readAt(off_t offset, void *data, size_t size) { 3335994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber Mutex::Autolock autoSerializer(mSerializer); 3345994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber 3355994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber LOG(VERBOSE) << "readAt offset " << offset << " size " << size; 3365994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber 3375994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber Mutex::Autolock autoLock(mLock); 3385994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber 3395994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber // If the request can be completely satisfied from the cache, do so. 3405994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber 3415994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber if (offset >= mCacheOffset 3425994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber && offset + size <= mCacheOffset + mCache->totalSize()) { 3435994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber size_t delta = offset - mCacheOffset; 3445994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber mCache->copy(delta, data, size); 3455994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber 3465994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber mLastAccessPos = offset + size; 3475994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber 3485994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber return size; 3495994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber } 3505994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber 3515994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber sp<AMessage> msg = new AMessage(kWhatRead, mReflector->id()); 3525994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber msg->setInt64("offset", offset); 3535994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber msg->setPointer("data", data); 3545994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber msg->setSize("size", size); 3555994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber 3565994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber CHECK(mAsyncResult == NULL); 3575994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber msg->post(); 3585994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber 3595994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber while (mAsyncResult == NULL) { 3605994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber mCondition.wait(mLock); 3615994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber } 3625994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber 3635994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber int32_t result; 3645994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber CHECK(mAsyncResult->findInt32("result", &result)); 3655994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber 3665994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber mAsyncResult.clear(); 3675994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber 3685994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber if (result > 0) { 3695994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber mLastAccessPos = offset + result; 3705994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber } 3715994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber 3725994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber return (ssize_t)result; 3735994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber} 3745994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber 3755994b4798b01f3dd340577c9ea9657f09093a770Andreas Hubersize_t NuCachedSource2::cachedSize() { 3765994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber Mutex::Autolock autoLock(mLock); 3775994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber return mCacheOffset + mCache->totalSize(); 3785994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber} 3795994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber 3805994b4798b01f3dd340577c9ea9657f09093a770Andreas Hubersize_t NuCachedSource2::approxDataRemaining(bool *eos) { 3815994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber Mutex::Autolock autoLock(mLock); 3825994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber return approxDataRemaining_l(eos); 3835994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber} 3845994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber 3855994b4798b01f3dd340577c9ea9657f09093a770Andreas Hubersize_t NuCachedSource2::approxDataRemaining_l(bool *eos) { 3865994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber *eos = (mFinalStatus != OK); 3875994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber off_t lastBytePosCached = mCacheOffset + mCache->totalSize(); 3885994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber if (mLastAccessPos < lastBytePosCached) { 3895994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber return lastBytePosCached - mLastAccessPos; 3905994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber } 3915994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber return 0; 3925994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber} 3935994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber 3945994b4798b01f3dd340577c9ea9657f09093a770Andreas Huberssize_t NuCachedSource2::readInternal(off_t offset, void *data, size_t size) { 3955994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber LOG(VERBOSE) << "readInternal offset " << offset << " size " << size; 3965994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber 3975994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber Mutex::Autolock autoLock(mLock); 3985994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber 3995994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber if (offset < mCacheOffset 4005994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber || offset >= (off_t)(mCacheOffset + mCache->totalSize())) { 4015994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber static const off_t kPadding = 32768; 4025994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber 4035994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber // In the presence of multiple decoded streams, once of them will 4045994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber // trigger this seek request, the other one will request data "nearby" 4055994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber // soon, adjust the seek position so that that subsequent request 4065994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber // does not trigger another seek. 4075994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber off_t seekOffset = (offset > kPadding) ? offset - kPadding : 0; 4085994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber 4095994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber seekInternal_l(seekOffset); 4105994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber } 4115994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber 4125994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber size_t delta = offset - mCacheOffset; 4135994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber 4145994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber if (mFinalStatus != OK) { 4155994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber if (delta >= mCache->totalSize()) { 4165994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber return mFinalStatus; 4175994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber } 4185994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber 4196f5aae1bcba130d5b8092a19fca3627aa565df56Andreas Huber size_t avail = mCache->totalSize() - delta; 4205994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber mCache->copy(delta, data, avail); 4215994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber 4225994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber return avail; 4235994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber } 4245994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber 4255994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber if (offset + size <= mCacheOffset + mCache->totalSize()) { 4265994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber mCache->copy(delta, data, size); 4275994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber 4285994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber return size; 4295994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber } 4305994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber 4315994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber LOG(VERBOSE) << "deferring read"; 4325994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber 4335994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber return -EAGAIN; 4345994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber} 4355994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber 4365994b4798b01f3dd340577c9ea9657f09093a770Andreas Huberstatus_t NuCachedSource2::seekInternal_l(off_t offset) { 4375994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber mLastAccessPos = offset; 4385994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber 4395994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber if (offset >= mCacheOffset 4405994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber && offset <= (off_t)(mCacheOffset + mCache->totalSize())) { 4415994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber return OK; 4425994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber } 4435994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber 4445994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber LOG(INFO) << "new range: offset= " << offset; 4455994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber 4465994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber mCacheOffset = offset; 4475994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber 4485994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber size_t totalSize = mCache->totalSize(); 4495994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber CHECK_EQ(mCache->releaseFromStart(totalSize), totalSize); 4505994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber 4515994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber mFinalStatus = OK; 4525994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber mFetching = true; 4535994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber 4545994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber return OK; 4555994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber} 4565994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber 4575994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber} // namespace android 4585994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber 459