| /* |
| * Copyright (C) 2010 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| #ifndef NU_CACHED_SOURCE_2_H_ |
| |
| #define NU_CACHED_SOURCE_2_H_ |
| |
| #include <media/stagefright/foundation/ABase.h> |
| #include <media/stagefright/foundation/AHandlerReflector.h> |
| #include <media/stagefright/DataSource.h> |
| |
| namespace android { |
| |
| struct ALooper; |
| struct PageCache; |
| |
| struct NuCachedSource2 : public DataSource { |
| NuCachedSource2( |
| const sp<DataSource> &source, |
| const char *cacheConfig = NULL, |
| bool disconnectAtHighwatermark = false); |
| |
| virtual status_t initCheck() const; |
| |
| virtual ssize_t readAt(off64_t offset, void *data, size_t size); |
| |
| virtual status_t getSize(off64_t *size); |
| virtual uint32_t flags(); |
| |
| virtual sp<DecryptHandle> DrmInitialization(); |
| virtual void getDrmInfo(sp<DecryptHandle> &handle, DrmManagerClient **client); |
| virtual String8 getUri(); |
| |
| virtual String8 getMIMEType() const; |
| |
| //////////////////////////////////////////////////////////////////////////// |
| |
| size_t cachedSize(); |
| size_t approxDataRemaining(status_t *finalStatus); |
| |
| void resumeFetchingIfNecessary(); |
| |
| // The following methods are supported only if the |
| // data source is HTTP-based; otherwise, ERROR_UNSUPPORTED |
| // is returned. |
| status_t getEstimatedBandwidthKbps(int32_t *kbps); |
| status_t setCacheStatCollectFreq(int32_t freqMs); |
| |
| static void RemoveCacheSpecificHeaders( |
| KeyedVector<String8, String8> *headers, |
| String8 *cacheConfig, |
| bool *disconnectAtHighwatermark); |
| |
| protected: |
| virtual ~NuCachedSource2(); |
| |
| private: |
| friend struct AHandlerReflector<NuCachedSource2>; |
| |
| enum { |
| kPageSize = 65536, |
| kDefaultHighWaterThreshold = 20 * 1024 * 1024, |
| kDefaultLowWaterThreshold = 4 * 1024 * 1024, |
| |
| // Read data after a 15 sec timeout whether we're actively |
| // fetching or not. |
| kDefaultKeepAliveIntervalUs = 15000000, |
| }; |
| |
| enum { |
| kWhatFetchMore = 'fetc', |
| kWhatRead = 'read', |
| }; |
| |
| enum { |
| kMaxNumRetries = 10, |
| }; |
| |
| sp<DataSource> mSource; |
| sp<AHandlerReflector<NuCachedSource2> > mReflector; |
| sp<ALooper> mLooper; |
| |
| Mutex mSerializer; |
| Mutex mLock; |
| Condition mCondition; |
| |
| PageCache *mCache; |
| off64_t mCacheOffset; |
| status_t mFinalStatus; |
| off64_t mLastAccessPos; |
| sp<AMessage> mAsyncResult; |
| bool mFetching; |
| int64_t mLastFetchTimeUs; |
| |
| int32_t mNumRetriesLeft; |
| |
| size_t mHighwaterThresholdBytes; |
| size_t mLowwaterThresholdBytes; |
| |
| // If the keep-alive interval is 0, keep-alives are disabled. |
| int64_t mKeepAliveIntervalUs; |
| |
| bool mDisconnectAtHighwatermark; |
| |
| void onMessageReceived(const sp<AMessage> &msg); |
| void onFetch(); |
| void onRead(const sp<AMessage> &msg); |
| |
| void fetchInternal(); |
| ssize_t readInternal(off64_t offset, void *data, size_t size); |
| status_t seekInternal_l(off64_t offset); |
| |
| size_t approxDataRemaining_l(status_t *finalStatus); |
| |
| void restartPrefetcherIfNecessary_l( |
| bool ignoreLowWaterThreshold = false, bool force = false); |
| |
| void updateCacheParamsFromSystemProperty(); |
| void updateCacheParamsFromString(const char *s); |
| |
| DISALLOW_EVIL_CONSTRUCTORS(NuCachedSource2); |
| }; |
| |
| } // namespace android |
| |
| #endif // NU_CACHED_SOURCE_2_H_ |