| /* |
| * Copyright (C) 2009 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 DATA_SOURCE_H_ |
| |
| #define DATA_SOURCE_H_ |
| |
| #include <sys/types.h> |
| |
| #include <utils/Errors.h> |
| #include <utils/KeyedVector.h> |
| #include <utils/List.h> |
| #include <utils/RefBase.h> |
| #include <utils/threads.h> |
| #include <drm/DrmManagerClient.h> |
| |
| namespace android { |
| |
| struct AMessage; |
| class String8; |
| |
| class DataSource : public RefBase { |
| public: |
| enum Flags { |
| kWantsPrefetching = 1, |
| kStreamedFromLocalHost = 2, |
| kIsCachingDataSource = 4, |
| }; |
| |
| static sp<DataSource> CreateFromURI( |
| const char *uri, |
| const KeyedVector<String8, String8> *headers = NULL); |
| |
| DataSource() {} |
| |
| virtual status_t initCheck() const = 0; |
| |
| virtual ssize_t readAt(off64_t offset, void *data, size_t size) = 0; |
| |
| // Convenience methods: |
| bool getUInt16(off64_t offset, uint16_t *x); |
| |
| // May return ERROR_UNSUPPORTED. |
| virtual status_t getSize(off64_t *size); |
| |
| virtual uint32_t flags() { |
| return 0; |
| } |
| |
| //////////////////////////////////////////////////////////////////////////// |
| |
| bool sniff(String8 *mimeType, float *confidence, sp<AMessage> *meta); |
| |
| // The sniffer can optionally fill in "meta" with an AMessage containing |
| // a dictionary of values that helps the corresponding extractor initialize |
| // its state without duplicating effort already exerted by the sniffer. |
| typedef bool (*SnifferFunc)( |
| const sp<DataSource> &source, String8 *mimeType, |
| float *confidence, sp<AMessage> *meta); |
| |
| static void RegisterSniffer(SnifferFunc func); |
| static void RegisterDefaultSniffers(); |
| |
| // for DRM |
| virtual DecryptHandle* DrmInitialization(DrmManagerClient *client) { |
| return NULL; |
| } |
| virtual void getDrmInfo(DecryptHandle **handle, DrmManagerClient **client) {}; |
| |
| virtual String8 getUri() { |
| return String8(); |
| } |
| |
| protected: |
| virtual ~DataSource() {} |
| |
| private: |
| static Mutex gSnifferMutex; |
| static List<SnifferFunc> gSniffers; |
| |
| DataSource(const DataSource &); |
| DataSource &operator=(const DataSource &); |
| }; |
| |
| } // namespace android |
| |
| #endif // DATA_SOURCE_H_ |