1/*
2 * Copyright 2012, 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 MEDIA_PULLER_H_
18
19#define MEDIA_PULLER_H_
20
21#include <media/stagefright/foundation/AHandler.h>
22
23namespace android {
24
25struct MediaSource;
26
27struct MediaPuller : public AHandler {
28    enum {
29        kWhatEOS,
30        kWhatAccessUnit
31    };
32
33    MediaPuller(const sp<MediaSource> &source, const sp<AMessage> &notify);
34
35    status_t start();
36    void stopAsync(const sp<AMessage> &notify);
37
38    void pause();
39    void resume();
40
41protected:
42    virtual void onMessageReceived(const sp<AMessage> &msg);
43    virtual ~MediaPuller();
44
45private:
46    enum {
47        kWhatStart,
48        kWhatStop,
49        kWhatPull,
50        kWhatPause,
51        kWhatResume,
52    };
53
54    sp<MediaSource> mSource;
55    sp<AMessage> mNotify;
56    int32_t mPullGeneration;
57    bool mIsAudio;
58    bool mPaused;
59
60    status_t postSynchronouslyAndReturnError(const sp<AMessage> &msg);
61    void schedulePull();
62
63    DISALLOW_EVIL_CONSTRUCTORS(MediaPuller);
64};
65
66}  // namespace android
67
68#endif  // MEDIA_PULLER_H_
69