| /* |
| * Copyright 2015 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 HTTP_DOWNLOADER_H_ |
| |
| #define HTTP_DOWNLOADER_H_ |
| |
| #include <media/stagefright/foundation/ADebug.h> |
| #include <utils/KeyedVector.h> |
| #include <utils/Mutex.h> |
| #include <utils/RefBase.h> |
| |
| namespace android { |
| |
| struct ABuffer; |
| class DataSource; |
| struct HTTPBase; |
| struct MediaHTTPService; |
| struct M3UParser; |
| |
| struct HTTPDownloader : public RefBase { |
| HTTPDownloader( |
| const sp<MediaHTTPService> &httpService, |
| const KeyedVector<String8, String8> &headers); |
| |
| void reconnect(); |
| void disconnect(); |
| bool isDisconnecting(); |
| // If given a non-zero block_size (default 0), it is used to cap the number of |
| // bytes read in from the DataSource. If given a non-NULL buffer, new content |
| // is read into the end. |
| // |
| // The DataSource we read from is responsible for signaling error or EOF to help us |
| // break out of the read loop. The DataSource can be returned to the caller, so |
| // that the caller can reuse it for subsequent fetches (within the initially |
| // requested range). |
| // |
| // For reused HTTP sources, the caller must download a file sequentially without |
| // any overlaps or gaps to prevent reconnection. |
| ssize_t fetchBlock( |
| const char *url, |
| sp<ABuffer> *out, |
| int64_t range_offset, /* open file at range_offset */ |
| int64_t range_length, /* open file for range_length (-1: entire file) */ |
| uint32_t block_size, /* download block size (0: entire range) */ |
| String8 *actualUrl, /* returns actual URL */ |
| bool reconnect /* force connect http */ |
| ); |
| |
| // simplified version to fetch a single file |
| ssize_t fetchFile( |
| const char *url, |
| sp<ABuffer> *out, |
| String8 *actualUrl = NULL); |
| |
| // fetch a playlist file |
| sp<M3UParser> fetchPlaylist( |
| const char *url, uint8_t *curPlaylistHash, bool *unchanged); |
| |
| private: |
| sp<HTTPBase> mHTTPDataSource; |
| sp<DataSource> mDataSource; |
| KeyedVector<String8, String8> mExtraHeaders; |
| |
| Mutex mLock; |
| bool mDisconnecting; |
| |
| DISALLOW_EVIL_CONSTRUCTORS(HTTPDownloader); |
| }; |
| |
| } // namespace android |
| |
| #endif // HTTP_DOWNLOADER_H_ |