1/*
2 * Copyright (C) 2011 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 TIMEDTEXT_PLAYER_H_
18
19#define TIMEDTEXT_PLAYER_H_
20
21#include <media/MediaPlayerInterface.h>
22#include <media/stagefright/foundation/ABase.h>
23#include <media/stagefright/foundation/AString.h>
24
25#include "include/TimedEventQueue.h"
26#include "TimedTextParser.h"
27
28namespace android {
29
30class MediaSource;
31class AwesomePlayer;
32class MediaBuffer;
33
34class TimedTextPlayer {
35public:
36    TimedTextPlayer(AwesomePlayer *observer,
37                    const wp<MediaPlayerBase> &listener,
38                    TimedEventQueue *queue);
39
40    virtual ~TimedTextPlayer();
41
42    // index: the index of the text track which will
43    // be turned on
44    status_t start(uint8_t index);
45
46    void pause();
47
48    void resume();
49
50    status_t seekTo(int64_t time_us);
51
52    void addTextSource(sp<MediaSource> source);
53
54    status_t setTimedTextTrackIndex(int32_t index);
55    status_t setParameter(int key, const Parcel &request);
56
57private:
58    enum TextType {
59        kNoText        = 0,
60        kInBandText    = 1,
61        kOutOfBandText = 2,
62    };
63
64    Mutex mLock;
65
66    sp<MediaSource> mSource;
67    sp<DataSource> mOutOfBandSource;
68
69    bool mSeeking;
70    int64_t mSeekTimeUs;
71
72    bool mStarted;
73
74    sp<TimedEventQueue::Event> mTextEvent;
75    bool mTextEventPending;
76
77    TimedEventQueue *mQueue;
78
79    wp<MediaPlayerBase> mListener;
80    AwesomePlayer *mObserver;
81
82    MediaBuffer *mTextBuffer;
83    Parcel mData;
84
85    // for in-band timed text
86    Vector<sp<MediaSource> > mTextTrackVector;
87
88    // for out-of-band timed text
89    struct OutOfBandText {
90        TimedTextParser::FileType type;
91        sp<DataSource> source;
92    };
93    Vector<OutOfBandText > mTextOutOfBandVector;
94
95    sp<TimedTextParser> mTextParser;
96    AString mText;
97
98    TextType mTextType;
99
100    void reset();
101
102    void onTextEvent();
103    void postTextEvent(int64_t delayUs = -1);
104    void cancelTextEvent();
105
106    void notifyListener(int msg, const Parcel *parcel = NULL);
107
108    status_t extractAndAppendLocalDescriptions(int64_t timeUs);
109    status_t extractAndSendGlobalDescriptions();
110
111    DISALLOW_EVIL_CONSTRUCTORS(TimedTextPlayer);
112};
113
114}  // namespace android
115
116#endif  // TIMEDTEXT_PLAYER_H_
117