NuPlayerSource.h revision cc227036b05f7c2f960a89c567a61f9decefe742 
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#include <media/stagefright/MetaData.h>
25#include <utils/Vector.h>
26
27namespace android {
28
29struct ABuffer;
30struct MetaData;
31struct MediaBuffer;
32
33struct NuPlayer::Source : public AHandler {
34    enum Flags {
35        FLAG_CAN_PAUSE          = 1,
36        FLAG_CAN_SEEK_BACKWARD  = 2,  // the "10 sec back button"
37        FLAG_CAN_SEEK_FORWARD   = 4,  // the "10 sec forward button"
38        FLAG_CAN_SEEK           = 8,  // the "seek bar"
39        FLAG_DYNAMIC_DURATION   = 16,
40        FLAG_SECURE             = 32,
41    };
42
43    enum {
44        kWhatPrepared,
45        kWhatFlagsChanged,
46        kWhatVideoSizeChanged,
47        kWhatBufferingStart,
48        kWhatBufferingEnd,
49        kWhatSubtitleData,
50        kWhatQueueDecoderShutdown,
51    };
52
53    // The provides message is used to notify the player about various
54    // events.
55    Source(const sp<AMessage> &notify)
56        : mNotify(notify) {
57    }
58
59    virtual void prepareAsync() = 0;
60
61    virtual void start() = 0;
62    virtual void stop() {}
63    virtual void pause() {}
64    virtual void resume() {}
65
66    // Returns OK iff more data was available,
67    // an error or ERROR_END_OF_STREAM if not.
68    virtual status_t feedMoreTSData() = 0;
69
70    virtual sp<AMessage> getFormat(bool audio);
71    virtual sp<MetaData> getFormatMeta(bool /* audio */) { return NULL; }
72
73    virtual status_t dequeueAccessUnit(
74            bool audio, sp<ABuffer> *accessUnit) = 0;
75
76    virtual status_t getDuration(int64_t * /* durationUs */) {
77        return INVALID_OPERATION;
78    }
79
80    virtual size_t getTrackCount() const {
81        return 0;
82    }
83
84    virtual sp<AMessage> getTrackInfo(size_t /* trackIndex */) const {
85        return NULL;
86    }
87
88    virtual status_t selectTrack(size_t /* trackIndex */, bool /* select */) {
89        return INVALID_OPERATION;
90    }
91
92    virtual status_t seekTo(int64_t /* seekTimeUs */) {
93        return INVALID_OPERATION;
94    }
95
96    virtual status_t setBuffers(bool /* audio */, Vector<MediaBuffer *> &/* buffers */) {
97        return INVALID_OPERATION;
98    }
99
100    virtual bool isRealTime() const {
101        return false;
102    }
103
104protected:
105    virtual ~Source() {}
106
107    virtual void onMessageReceived(const sp<AMessage> &msg);
108
109    sp<AMessage> dupNotify() const { return mNotify->dup(); }
110
111    void notifyFlagsChanged(uint32_t flags);
112    void notifyVideoSizeChanged(int32_t width, int32_t height);
113    void notifyPrepared(status_t err = OK);
114
115private:
116    sp<AMessage> mNotify;
117
118    DISALLOW_EVIL_CONSTRUCTORS(Source);
119};
120
121}  // namespace android
122
123#endif  // NUPLAYER_SOURCE_H_
124
125