LiveDataSource.h revision a44153c1a57202fb538659eb50706e60454d6273 
1/*
2 * Copyright (C) 2010 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 LIVE_DATA_SOURCE_H_
18
19#define LIVE_DATA_SOURCE_H_
20
21#include <media/stagefright/foundation/ABase.h>
22#include <media/stagefright/DataSource.h>
23#include <utils/threads.h>
24#include <utils/List.h>
25
26namespace android {
27
28struct ABuffer;
29
30struct LiveDataSource : public DataSource {
31    LiveDataSource();
32
33    virtual status_t initCheck() const;
34
35    virtual ssize_t readAt(off64_t offset, void *data, size_t size);
36
37    void queueBuffer(const sp<ABuffer> &buffer);
38    void queueEOS(status_t finalResult);
39    void reset();
40
41    size_t countQueuedBuffers();
42
43protected:
44    virtual ~LiveDataSource();
45
46private:
47    Mutex mLock;
48    Condition mCondition;
49
50    off64_t mOffset;
51    List<sp<ABuffer> > mBufferQueue;
52    status_t mFinalResult;
53
54    FILE *mBackupFile;
55
56    DISALLOW_EVIL_CONSTRUCTORS(LiveDataSource);
57};
58
59}  // namespace android
60
61#endif  // LIVE_DATA_SOURCE_H_
62