NuPlayerSource.h revision bc2fb720bbd0acd122bacc67e844e982d068f6f9 
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    virtual sp<MetaData> getFormatMeta(bool /* audio */) { return NULL; }
68
69    virtual status_t dequeueAccessUnit(
70            bool audio, sp<ABuffer> *accessUnit) = 0;
71
72    virtual status_t getDuration(int64_t * /* durationUs */) {
73        return INVALID_OPERATION;
74    }
75
76    virtual size_t getTrackCount() const {
77        return 0;
78    }
79
80    virtual sp<AMessage> getTrackInfo(size_t /* trackIndex */) const {
81        return NULL;
82    }
83
84    virtual status_t selectTrack(size_t /* trackIndex */, bool /* select */) {
85        return INVALID_OPERATION;
86    }
87
88    virtual status_t seekTo(int64_t /* seekTimeUs */) {
89        return INVALID_OPERATION;
90    }
91
92    virtual bool isRealTime() const {
93        return false;
94    }
95
96protected:
97    virtual ~Source() {}
98
99    virtual void onMessageReceived(const sp<AMessage> &msg);
100
101    sp<AMessage> dupNotify() const { return mNotify->dup(); }
102
103    void notifyFlagsChanged(uint32_t flags);
104    void notifyVideoSizeChanged(int32_t width, int32_t height);
105    void notifyPrepared(status_t err = OK);
106
107private:
108    sp<AMessage> mNotify;
109
110    DISALLOW_EVIL_CONSTRUCTORS(Source);
111};
112
113}  // namespace android
114
115#endif  // NUPLAYER_SOURCE_H_
116
117