NuPlayerSource.h revision 2a3cc9a64330dd36e466fe5e1b634146f2d641c1 
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 <media/mediaplayer.h>
26#include <utils/Vector.h>
27
28namespace android {
29
30struct ABuffer;
31struct MetaData;
32struct MediaBuffer;
33
34struct NuPlayer::Source : public AHandler {
35    enum Flags {
36        FLAG_CAN_PAUSE          = 1,
37        FLAG_CAN_SEEK_BACKWARD  = 2,  // the "10 sec back button"
38        FLAG_CAN_SEEK_FORWARD   = 4,  // the "10 sec forward button"
39        FLAG_CAN_SEEK           = 8,  // the "seek bar"
40        FLAG_DYNAMIC_DURATION   = 16,
41        FLAG_SECURE             = 32,
42    };
43
44    enum {
45        kWhatPrepared,
46        kWhatFlagsChanged,
47        kWhatVideoSizeChanged,
48        kWhatBufferingUpdate,
49        kWhatBufferingStart,
50        kWhatBufferingEnd,
51        kWhatSubtitleData,
52        kWhatTimedTextData,
53        kWhatQueueDecoderShutdown,
54    };
55
56    // The provides message is used to notify the player about various
57    // events.
58    Source(const sp<AMessage> &notify)
59        : mNotify(notify) {
60    }
61
62    virtual void prepareAsync() = 0;
63
64    virtual void start() = 0;
65    virtual void stop() {}
66    virtual void pause() {}
67    virtual void resume() {}
68
69    // Returns OK iff more data was available,
70    // an error or ERROR_END_OF_STREAM if not.
71    virtual status_t feedMoreTSData() = 0;
72
73    virtual sp<AMessage> getFormat(bool audio);
74    virtual sp<MetaData> getFormatMeta(bool /* audio */) { return NULL; }
75
76    virtual status_t dequeueAccessUnit(
77            bool audio, sp<ABuffer> *accessUnit) = 0;
78
79    virtual status_t getDuration(int64_t * /* durationUs */) {
80        return INVALID_OPERATION;
81    }
82
83    virtual size_t getTrackCount() const {
84        return 0;
85    }
86
87    virtual sp<AMessage> getTrackInfo(size_t /* trackIndex */) const {
88        return NULL;
89    }
90
91    virtual ssize_t getSelectedTrack(media_track_type /* type */) const {
92        return INVALID_OPERATION;
93    }
94
95    virtual status_t selectTrack(size_t /* trackIndex */, bool /* select */) {
96        return INVALID_OPERATION;
97    }
98
99    virtual status_t seekTo(int64_t /* seekTimeUs */) {
100        return INVALID_OPERATION;
101    }
102
103    virtual status_t setBuffers(bool /* audio */, Vector<MediaBuffer *> &/* buffers */) {
104        return INVALID_OPERATION;
105    }
106
107    virtual bool isRealTime() const {
108        return false;
109    }
110
111protected:
112    virtual ~Source() {}
113
114    virtual void onMessageReceived(const sp<AMessage> &msg);
115
116    sp<AMessage> dupNotify() const { return mNotify->dup(); }
117
118    void notifyFlagsChanged(uint32_t flags);
119    void notifyVideoSizeChanged(const sp<AMessage> &format = NULL);
120    void notifyPrepared(status_t err = OK);
121
122private:
123    sp<AMessage> mNotify;
124
125    DISALLOW_EVIL_CONSTRUCTORS(Source);
126};
127
128}  // namespace android
129
130#endif  // NUPLAYER_SOURCE_H_
131
132