blob: 3bae143d020799d246ff82589b2c929ed7a3d861 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
|
/*
* Copyright 2012 Sebastian Annies, Hamburg
*
* Licensed under the Apache License, Version 2.0 (the License);
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an AS IS BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.googlecode.mp4parser.authoring.tracks;
import com.coremedia.iso.boxes.*;
import com.coremedia.iso.boxes.sampleentry.TextSampleEntry;
import com.googlecode.mp4parser.authoring.AbstractTrack;
import com.googlecode.mp4parser.authoring.TrackMetaData;
import com.googlecode.mp4parser.boxes.threegpp26245.FontTableBox;
import java.io.ByteArrayOutputStream;
import java.io.DataOutputStream;
import java.io.IOException;
import java.nio.ByteBuffer;
import java.util.Collections;
import java.util.Date;
import java.util.LinkedList;
import java.util.List;
/**
*
*/
public class TextTrackImpl extends AbstractTrack {
TrackMetaData trackMetaData = new TrackMetaData();
SampleDescriptionBox sampleDescriptionBox;
List<Line> subs = new LinkedList<Line>();
public List<Line> getSubs() {
return subs;
}
public TextTrackImpl() {
sampleDescriptionBox = new SampleDescriptionBox();
TextSampleEntry tx3g = new TextSampleEntry("tx3g");
tx3g.setDataReferenceIndex(1);
tx3g.setStyleRecord(new TextSampleEntry.StyleRecord());
tx3g.setBoxRecord(new TextSampleEntry.BoxRecord());
sampleDescriptionBox.addBox(tx3g);
FontTableBox ftab = new FontTableBox();
ftab.setEntries(Collections.singletonList(new FontTableBox.FontRecord(1, "Serif")));
tx3g.addBox(ftab);
trackMetaData.setCreationTime(new Date());
trackMetaData.setModificationTime(new Date());
trackMetaData.setTimescale(1000); // Text tracks use millieseconds
}
public List<ByteBuffer> getSamples() {
List<ByteBuffer> samples = new LinkedList<ByteBuffer>();
long lastEnd = 0;
for (Line sub : subs) {
long silentTime = sub.from - lastEnd;
if (silentTime > 0) {
samples.add(ByteBuffer.wrap(new byte[]{0, 0}));
} else if (silentTime < 0) {
throw new Error("Subtitle display times may not intersect");
}
ByteArrayOutputStream baos = new ByteArrayOutputStream();
DataOutputStream dos = new DataOutputStream(baos);
try {
dos.writeShort(sub.text.getBytes("UTF-8").length);
dos.write(sub.text.getBytes("UTF-8"));
dos.close();
} catch (IOException e) {
throw new Error("VM is broken. Does not support UTF-8");
}
samples.add(ByteBuffer.wrap(baos.toByteArray()));
lastEnd = sub.to;
}
return samples;
}
public SampleDescriptionBox getSampleDescriptionBox() {
return sampleDescriptionBox;
}
public List<TimeToSampleBox.Entry> getDecodingTimeEntries() {
List<TimeToSampleBox.Entry> stts = new LinkedList<TimeToSampleBox.Entry>();
long lastEnd = 0;
for (Line sub : subs) {
long silentTime = sub.from - lastEnd;
if (silentTime > 0) {
stts.add(new TimeToSampleBox.Entry(1, silentTime));
} else if (silentTime < 0) {
throw new Error("Subtitle display times may not intersect");
}
stts.add(new TimeToSampleBox.Entry(1, sub.to - sub.from));
lastEnd = sub.to;
}
return stts;
}
public List<CompositionTimeToSample.Entry> getCompositionTimeEntries() {
return null;
}
public long[] getSyncSamples() {
return null;
}
public List<SampleDependencyTypeBox.Entry> getSampleDependencies() {
return null;
}
public TrackMetaData getTrackMetaData() {
return trackMetaData;
}
public String getHandler() {
return "sbtl";
}
public static class Line {
long from;
long to;
String text;
public Line(long from, long to, String text) {
this.from = from;
this.to = to;
this.text = text;
}
public long getFrom() {
return from;
}
public String getText() {
return text;
}
public long getTo() {
return to;
}
}
public AbstractMediaHeaderBox getMediaHeaderBox() {
return new NullMediaHeaderBox();
}
public SubSampleInformationBox getSubsampleInformationBox() {
return null;
}
}
|
