1 /*
2  * Copyright (C) 2018 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 FILE_SOURCE_H_
18 
19 #define FILE_SOURCE_H_
20 
21 #include <stdio.h>
22 
23 #include <media/DataSource.h>
24 #include <media/stagefright/MediaErrors.h>
25 #include <utils/threads.h>
26 
27 namespace android {
28 
29 class FileSource : public DataSource {
30 public:
31     FileSource(const char *filename);
32     // FileSource takes ownership and will close the fd
33     FileSource(int fd, int64_t offset, int64_t length);
34 
35     virtual status_t initCheck() const;
36 
37     virtual ssize_t readAt(off64_t offset, void *data, size_t size);
38 
39     virtual status_t getSize(off64_t *size);
40 
flags()41     virtual uint32_t flags() {
42         return kIsLocalFileSource;
43     }
44 
toString()45     virtual String8 toString() {
46         return mName;
47     }
48 
49 protected:
50     virtual ~FileSource();
51     virtual ssize_t readAt_l(off64_t offset, void *data, size_t size);
52 
53     int mFd;
54     int64_t mOffset;
55     int64_t mLength;
56     Mutex mLock;
57 
58 private:
59     String8 mName;
60 
61     FileSource(const FileSource &);
62     FileSource &operator=(const FileSource &);
63 };
64 
65 }  // namespace android
66 
67 #endif  // FILE_SOURCE_H_
68 
69