Andreas Huber | e46b7be | 2009-07-14 16:56:47 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2009 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 | |
| 17 | #ifndef DATA_SOURCE_H_ |
| 18 | |
| 19 | #define DATA_SOURCE_H_ |
| 20 | |
| 21 | #include <sys/types.h> |
| 22 | |
| 23 | #include <utils/Errors.h> |
Andreas Huber | 433c9ac | 2010-01-27 16:49:05 -0800 | [diff] [blame] | 24 | #include <utils/KeyedVector.h> |
Andreas Huber | e46b7be | 2009-07-14 16:56:47 -0700 | [diff] [blame] | 25 | #include <utils/List.h> |
Andreas Huber | be06d26 | 2009-08-14 14:37:10 -0700 | [diff] [blame] | 26 | #include <utils/RefBase.h> |
Andreas Huber | e46b7be | 2009-07-14 16:56:47 -0700 | [diff] [blame] | 27 | #include <utils/threads.h> |
Gloria Wang | d577091 | 2010-06-22 13:55:38 -0700 | [diff] [blame] | 28 | #include <drm/DrmManagerClient.h> |
Andreas Huber | e46b7be | 2009-07-14 16:56:47 -0700 | [diff] [blame] | 29 | |
| 30 | namespace android { |
| 31 | |
Andreas Huber | efdd088 | 2010-08-25 11:09:41 -0700 | [diff] [blame] | 32 | struct AMessage; |
Andreas Huber | e46b7be | 2009-07-14 16:56:47 -0700 | [diff] [blame] | 33 | class String8; |
| 34 | |
Andreas Huber | be06d26 | 2009-08-14 14:37:10 -0700 | [diff] [blame] | 35 | class DataSource : public RefBase { |
Andreas Huber | e46b7be | 2009-07-14 16:56:47 -0700 | [diff] [blame] | 36 | public: |
Andreas Huber | b9e6383 | 2010-01-26 16:20:10 -0800 | [diff] [blame] | 37 | enum Flags { |
Andreas Huber | 62f7ffe | 2010-05-06 10:18:05 -0700 | [diff] [blame] | 38 | kWantsPrefetching = 1, |
| 39 | kStreamedFromLocalHost = 2, |
Andreas Huber | 54d0972 | 2010-10-12 11:34:37 -0700 | [diff] [blame] | 40 | kIsCachingDataSource = 4, |
Andreas Huber | b9e6383 | 2010-01-26 16:20:10 -0800 | [diff] [blame] | 41 | }; |
| 42 | |
Andreas Huber | 433c9ac | 2010-01-27 16:49:05 -0800 | [diff] [blame] | 43 | static sp<DataSource> CreateFromURI( |
| 44 | const char *uri, |
| 45 | const KeyedVector<String8, String8> *headers = NULL); |
Andreas Huber | aee3c63 | 2010-01-11 15:35:19 -0800 | [diff] [blame] | 46 | |
Andreas Huber | e46b7be | 2009-07-14 16:56:47 -0700 | [diff] [blame] | 47 | DataSource() {} |
Andreas Huber | e46b7be | 2009-07-14 16:56:47 -0700 | [diff] [blame] | 48 | |
Andreas Huber | 9a12baf | 2009-10-23 10:22:30 -0700 | [diff] [blame] | 49 | virtual status_t initCheck() const = 0; |
| 50 | |
James Dong | b1262a8 | 2010-11-16 14:04:54 -0800 | [diff] [blame] | 51 | virtual ssize_t readAt(off64_t offset, void *data, size_t size) = 0; |
Andreas Huber | e46b7be | 2009-07-14 16:56:47 -0700 | [diff] [blame] | 52 | |
Andreas Huber | be06d26 | 2009-08-14 14:37:10 -0700 | [diff] [blame] | 53 | // Convenience methods: |
James Dong | b1262a8 | 2010-11-16 14:04:54 -0800 | [diff] [blame] | 54 | bool getUInt16(off64_t offset, uint16_t *x); |
Andreas Huber | be06d26 | 2009-08-14 14:37:10 -0700 | [diff] [blame] | 55 | |
Andreas Huber | e46b7be | 2009-07-14 16:56:47 -0700 | [diff] [blame] | 56 | // May return ERROR_UNSUPPORTED. |
James Dong | b1262a8 | 2010-11-16 14:04:54 -0800 | [diff] [blame] | 57 | virtual status_t getSize(off64_t *size); |
Andreas Huber | e46b7be | 2009-07-14 16:56:47 -0700 | [diff] [blame] | 58 | |
Andreas Huber | b9e6383 | 2010-01-26 16:20:10 -0800 | [diff] [blame] | 59 | virtual uint32_t flags() { |
| 60 | return 0; |
| 61 | } |
| 62 | |
Andreas Huber | e46b7be | 2009-07-14 16:56:47 -0700 | [diff] [blame] | 63 | //////////////////////////////////////////////////////////////////////////// |
| 64 | |
Andreas Huber | efdd088 | 2010-08-25 11:09:41 -0700 | [diff] [blame] | 65 | bool sniff(String8 *mimeType, float *confidence, sp<AMessage> *meta); |
Andreas Huber | e46b7be | 2009-07-14 16:56:47 -0700 | [diff] [blame] | 66 | |
Andreas Huber | efdd088 | 2010-08-25 11:09:41 -0700 | [diff] [blame] | 67 | // The sniffer can optionally fill in "meta" with an AMessage containing |
| 68 | // a dictionary of values that helps the corresponding extractor initialize |
| 69 | // its state without duplicating effort already exerted by the sniffer. |
Andreas Huber | e46b7be | 2009-07-14 16:56:47 -0700 | [diff] [blame] | 70 | typedef bool (*SnifferFunc)( |
Andreas Huber | efdd088 | 2010-08-25 11:09:41 -0700 | [diff] [blame] | 71 | const sp<DataSource> &source, String8 *mimeType, |
| 72 | float *confidence, sp<AMessage> *meta); |
Andreas Huber | e46b7be | 2009-07-14 16:56:47 -0700 | [diff] [blame] | 73 | |
| 74 | static void RegisterSniffer(SnifferFunc func); |
| 75 | static void RegisterDefaultSniffers(); |
| 76 | |
Gloria Wang | d577091 | 2010-06-22 13:55:38 -0700 | [diff] [blame] | 77 | // for DRM |
Gloria Wang | ae77527 | 2011-02-24 16:40:57 -0800 | [diff] [blame] | 78 | virtual sp<DecryptHandle> DrmInitialization() { |
Gloria Wang | d577091 | 2010-06-22 13:55:38 -0700 | [diff] [blame] | 79 | return NULL; |
| 80 | } |
Gloria Wang | ae77527 | 2011-02-24 16:40:57 -0800 | [diff] [blame] | 81 | virtual void getDrmInfo(sp<DecryptHandle> &handle, DrmManagerClient **client) {}; |
Gloria Wang | d577091 | 2010-06-22 13:55:38 -0700 | [diff] [blame] | 82 | |
Gloria Wang | 43cd12d | 2010-11-09 15:06:51 -0800 | [diff] [blame] | 83 | virtual String8 getUri() { |
| 84 | return String8(); |
| 85 | } |
Gloria Wang | d577091 | 2010-06-22 13:55:38 -0700 | [diff] [blame] | 86 | |
Andreas Huber | a2e57ca | 2011-03-30 11:15:27 -0700 | [diff] [blame] | 87 | virtual String8 getMIMEType() const; |
| 88 | |
Andreas Huber | be06d26 | 2009-08-14 14:37:10 -0700 | [diff] [blame] | 89 | protected: |
| 90 | virtual ~DataSource() {} |
| 91 | |
Andreas Huber | e46b7be | 2009-07-14 16:56:47 -0700 | [diff] [blame] | 92 | private: |
| 93 | static Mutex gSnifferMutex; |
| 94 | static List<SnifferFunc> gSniffers; |
| 95 | |
| 96 | DataSource(const DataSource &); |
| 97 | DataSource &operator=(const DataSource &); |
| 98 | }; |
| 99 | |
| 100 | } // namespace android |
| 101 | |
| 102 | #endif // DATA_SOURCE_H_ |