NuPlayerSource.h revision 7f475c34ffc8e35345f2cceee2ef56a50bb5fea6 
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 NUPLAYER_SOURCE_H_
18
19#define NUPLAYER_SOURCE_H_
20
21#include "NuPlayer.h"
22
23#include <media/stagefright/foundation/AMessage.h>
24
25namespace android {
26
27struct ABuffer;
28struct MetaData;
29
30struct NuPlayer::Source : public AHandler {
31    enum Flags {
32        FLAG_CAN_PAUSE          = 1,
33        FLAG_CAN_SEEK_BACKWARD  = 2,  // the "10 sec back button"
34        FLAG_CAN_SEEK_FORWARD   = 4,  // the "10 sec forward button"
35        FLAG_CAN_SEEK           = 8,  // the "seek bar"
36        FLAG_DYNAMIC_DURATION   = 16,
37    };
38
39    enum {
40        kWhatPrepared,
41        kWhatFlagsChanged,
42        kWhatVideoSizeChanged,
43    };
44
45    // The provides message is used to notify the player about various
46    // events.
47    Source(const sp<AMessage> &notify)
48        : mNotify(notify) {
49    }
50
51    virtual void prepareAsync() = 0;
52
53    virtual void start() = 0;
54    virtual void stop() {}
55
56    // Returns OK iff more data was available,
57    // an error or ERROR_END_OF_STREAM if not.
58    virtual status_t feedMoreTSData() = 0;
59
60    virtual sp<AMessage> getFormat(bool audio);
61
62    virtual status_t dequeueAccessUnit(
63            bool audio, sp<ABuffer> *accessUnit) = 0;
64
65    virtual status_t getDuration(int64_t *durationUs) {
66        return INVALID_OPERATION;
67    }
68
69    virtual status_t seekTo(int64_t seekTimeUs) {
70        return INVALID_OPERATION;
71    }
72
73protected:
74    virtual ~Source() {}
75
76    virtual void onMessageReceived(const sp<AMessage> &msg);
77
78    virtual sp<MetaData> getFormatMeta(bool audio) { return NULL; }
79
80    sp<AMessage> dupNotify() const { return mNotify->dup(); }
81
82    void notifyFlagsChanged(uint32_t flags);
83    void notifyVideoSizeChanged(int32_t width, int32_t height);
84    void notifyPrepared(status_t err = OK);
85
86private:
87    sp<AMessage> mNotify;
88
89    DISALLOW_EVIL_CONSTRUCTORS(Source);
90};
91
92}  // namespace android
93
94#endif  // NUPLAYER_SOURCE_H_
95
96