NuPlayerSource.h revision ced1c2f8f6c422063092f5cc5c675ccdebb2dc10 
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        kWhatTimedTextData,
51        kWhatQueueDecoderShutdown,
52    };
53
54    // The provides message is used to notify the player about various
55    // events.
56    Source(const sp<AMessage> &notify)
57        : mNotify(notify) {
58    }
59
60    virtual void prepareAsync() = 0;
61
62    virtual void start() = 0;
63    virtual void stop() {}
64    virtual void pause() {}
65    virtual void resume() {}
66
67    // Returns OK iff more data was available,
68    // an error or ERROR_END_OF_STREAM if not.
69    virtual status_t feedMoreTSData() = 0;
70
71    virtual sp<AMessage> getFormat(bool audio);
72    virtual sp<MetaData> getFormatMeta(bool /* audio */) { return NULL; }
73
74    virtual status_t dequeueAccessUnit(
75            bool audio, sp<ABuffer> *accessUnit) = 0;
76
77    virtual status_t getDuration(int64_t * /* durationUs */) {
78        return INVALID_OPERATION;
79    }
80
81    virtual size_t getTrackCount() const {
82        return 0;
83    }
84
85    virtual sp<AMessage> getTrackInfo(size_t /* trackIndex */) const {
86        return NULL;
87    }
88
89    virtual status_t selectTrack(size_t /* trackIndex */, bool /* select */) {
90        return INVALID_OPERATION;
91    }
92
93    virtual status_t seekTo(int64_t /* seekTimeUs */) {
94        return INVALID_OPERATION;
95    }
96
97    virtual status_t setBuffers(bool /* audio */, Vector<MediaBuffer *> &/* buffers */) {
98        return INVALID_OPERATION;
99    }
100
101    virtual bool isRealTime() const {
102        return false;
103    }
104
105protected:
106    virtual ~Source() {}
107
108    virtual void onMessageReceived(const sp<AMessage> &msg);
109
110    sp<AMessage> dupNotify() const { return mNotify->dup(); }
111
112    void notifyFlagsChanged(uint32_t flags);
113    void notifyVideoSizeChanged(const sp<AMessage> &format = NULL);
114    void notifyPrepared(status_t err = OK);
115
116private:
117    sp<AMessage> mNotify;
118
119    DISALLOW_EVIL_CONSTRUCTORS(Source);
120};
121
122}  // namespace android
123
124#endif  // NUPLAYER_SOURCE_H_
125
126