NuPlayerSource.h revision 84333e0475bc911adc16417f4ca327c975cf6c36 
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        kWhatBufferingStart,
44        kWhatBufferingEnd,
45        kWhatSubtitleData,
46        kWhatQueueDecoderShutdown,
47    };
48
49    // The provides message is used to notify the player about various
50    // events.
51    Source(const sp<AMessage> &notify)
52        : mNotify(notify) {
53    }
54
55    virtual void prepareAsync() = 0;
56
57    virtual void start() = 0;
58    virtual void stop() {}
59    virtual void pause() {}
60    virtual void resume() {}
61
62    // Returns OK iff more data was available,
63    // an error or ERROR_END_OF_STREAM if not.
64    virtual status_t feedMoreTSData() = 0;
65
66    virtual sp<AMessage> getFormat(bool audio);
67
68    virtual status_t dequeueAccessUnit(
69            bool audio, sp<ABuffer> *accessUnit) = 0;
70
71    virtual status_t getDuration(int64_t * /* durationUs */) {
72        return INVALID_OPERATION;
73    }
74
75    virtual status_t getTrackInfo(Parcel* /* reply */) const {
76        return INVALID_OPERATION;
77    }
78
79    virtual status_t selectTrack(size_t /* trackIndex */, bool /* select */) {
80        return INVALID_OPERATION;
81    }
82
83    virtual status_t seekTo(int64_t /* seekTimeUs */) {
84        return INVALID_OPERATION;
85    }
86
87    virtual bool isRealTime() const {
88        return false;
89    }
90
91protected:
92    virtual ~Source() {}
93
94    virtual void onMessageReceived(const sp<AMessage> &msg);
95
96    virtual sp<MetaData> getFormatMeta(bool /* audio */) { return NULL; }
97
98    sp<AMessage> dupNotify() const { return mNotify->dup(); }
99
100    void notifyFlagsChanged(uint32_t flags);
101    void notifyVideoSizeChanged(int32_t width, int32_t height);
102    void notifyPrepared(status_t err = OK);
103
104private:
105    sp<AMessage> mNotify;
106
107    DISALLOW_EVIL_CONSTRUCTORS(Source);
108};
109
110}  // namespace android
111
112#endif  // NUPLAYER_SOURCE_H_
113
114