NuPlayerSource.h revision 5ab368af38fefacc4009e3ab1c1bbd00e62b3bcf 
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;
28
29struct NuPlayer::Source : public AHandler {
30    enum Flags {
31        FLAG_SEEKABLE           = 1,
32        FLAG_DYNAMIC_DURATION   = 2,
33    };
34
35    // The provides message is used to notify the player about various
36    // events.
37    Source(const sp<AMessage> &notify)
38        : mNotify(notify) {
39    }
40
41    virtual void start() = 0;
42    virtual void stop() {}
43
44    // Returns OK iff more data was available,
45    // an error or ERROR_END_OF_STREAM if not.
46    virtual status_t feedMoreTSData() = 0;
47
48    virtual sp<AMessage> getFormat(bool audio);
49
50    virtual status_t dequeueAccessUnit(
51            bool audio, sp<ABuffer> *accessUnit) = 0;
52
53    virtual status_t getDuration(int64_t *durationUs) {
54        return INVALID_OPERATION;
55    }
56
57    virtual status_t seekTo(int64_t seekTimeUs) {
58        return INVALID_OPERATION;
59    }
60
61    virtual uint32_t flags() const = 0;
62
63protected:
64    virtual ~Source() {}
65
66    virtual void onMessageReceived(const sp<AMessage> &msg);
67
68    virtual sp<MetaData> getFormatMeta(bool audio) { return NULL; }
69
70    sp<AMessage> dupNotify() const { return mNotify->dup(); }
71
72private:
73    sp<AMessage> mNotify;
74
75    DISALLOW_EVIL_CONSTRUCTORS(Source);
76};
77
78}  // namespace android
79
80#endif  // NUPLAYER_SOURCE_H_
81
82