CallbackDataSource.h revision 99f31604136d66ae10e20669fb6b5716f342bde0 
1/*
2 * Copyright 2015 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 ANDROID_CALLBACKDATASOURCE_H
18#define ANDROID_CALLBACKDATASOURCE_H
19
20#include <media/stagefright/DataSource.h>
21#include <media/stagefright/foundation/ADebug.h>
22
23namespace android {
24
25class IDataSource;
26class IMemory;
27
28// A stagefright DataSource that wraps a binder IDataSource. It's a "Callback"
29// DataSource because it calls back to the IDataSource for data.
30class CallbackDataSource : public DataSource {
31public:
32    CallbackDataSource(const sp<IDataSource>& iDataSource);
33    virtual ~CallbackDataSource();
34
35    // DataSource implementation.
36    virtual status_t initCheck() const;
37    virtual ssize_t readAt(off64_t offset, void *data, size_t size);
38    virtual status_t getSize(off64_t *size);
39
40private:
41    sp<IDataSource> mIDataSource;
42    sp<IMemory> mMemory;
43
44    DISALLOW_EVIL_CONSTRUCTORS(CallbackDataSource);
45};
46
47}; // namespace android
48
49#endif // ANDROID_CALLBACKDATASOURCE_H
50