NuCachedSource2.h revision 5994b4798b01f3dd340577c9ea9657f09093a770
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#ifndef NU_CACHED_SOURCE_2_H_ 185994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber 195994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber#define NU_CACHED_SOURCE_2_H_ 205994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber 215994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber#include <media/stagefright/foundation/ABase.h> 225994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber#include <media/stagefright/foundation/AHandlerReflector.h> 235994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber#include <media/stagefright/DataSource.h> 245994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber 255994b4798b01f3dd340577c9ea9657f09093a770Andreas Hubernamespace android { 265994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber 275994b4798b01f3dd340577c9ea9657f09093a770Andreas Huberstruct ALooper; 285994b4798b01f3dd340577c9ea9657f09093a770Andreas Huberstruct PageCache; 295994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber 305994b4798b01f3dd340577c9ea9657f09093a770Andreas Huberstruct NuCachedSource2 : public DataSource { 315994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber NuCachedSource2(const sp<DataSource> &source); 325994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber 335994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber virtual status_t initCheck() const; 345994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber 355994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber virtual ssize_t readAt(off_t offset, void *data, size_t size); 365994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber 375994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber virtual status_t getSize(off_t *size); 385994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber virtual uint32_t flags(); 395994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber 405994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber //////////////////////////////////////////////////////////////////////////// 415994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber 425994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber size_t cachedSize(); 435994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber size_t approxDataRemaining(bool *eos); 445994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber 455994b4798b01f3dd340577c9ea9657f09093a770Andreas Huberprotected: 465994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber virtual ~NuCachedSource2(); 475994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber 485994b4798b01f3dd340577c9ea9657f09093a770Andreas Huberprivate: 495994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber friend struct AHandlerReflector<NuCachedSource2>; 505994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber 515994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber enum { 525994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber kPageSize = 16384, 535994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber kHighWaterThreshold = 3 * 1024 * 1024, 545994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber kLowWaterThreshold = 512 * 1024, 555994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber }; 565994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber 575994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber enum { 585994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber kWhatFetchMore = 'fetc', 595994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber kWhatRead = 'read', 605994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber }; 615994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber 625994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber sp<DataSource> mSource; 635994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber sp<AHandlerReflector<NuCachedSource2> > mReflector; 645994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber sp<ALooper> mLooper; 655994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber 665994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber Mutex mSerializer; 675994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber Mutex mLock; 685994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber Condition mCondition; 695994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber 705994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber PageCache *mCache; 715994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber off_t mCacheOffset; 725994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber status_t mFinalStatus; 735994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber off_t mLastAccessPos; 745994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber sp<AMessage> mAsyncResult; 755994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber bool mFetching; 765994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber 775994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber void onMessageReceived(const sp<AMessage> &msg); 785994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber void onFetch(); 795994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber void onRead(const sp<AMessage> &msg); 805994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber 815994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber void fetchInternal(); 825994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber ssize_t readInternal(off_t offset, void *data, size_t size); 835994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber status_t seekInternal_l(off_t offset); 845994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber 855994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber size_t approxDataRemaining_l(bool *eos); 865994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber void restartPrefetcherIfNecessary_l(); 875994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber 885994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber DISALLOW_EVIL_CONSTRUCTORS(NuCachedSource2); 895994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber}; 905994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber 915994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber} // namespace android 925994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber 935994b4798b01f3dd340577c9ea9657f09093a770Andreas Huber#endif // NU_CACHED_SOURCE_2_H_ 94