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
|
/*
* 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.googlecode.mp4parser.authoring.Movie;
import com.googlecode.mp4parser.authoring.Track;
import com.googlecode.mp4parser.authoring.TrackMetaData;
import java.nio.ByteBuffer;
import java.util.ArrayList;
import java.util.LinkedList;
import java.util.List;
import static com.googlecode.mp4parser.util.CastUtils.l2i;
import static com.googlecode.mp4parser.util.Math.gcd;
import static com.googlecode.mp4parser.util.Math.lcm;
import static java.lang.Math.round;
/**
* Changes the timescale of a track by wrapping the track.
*/
public class MultiplyTimeScaleTrack implements Track {
Track source;
private int timeScaleFactor;
public MultiplyTimeScaleTrack(Track source, int timeScaleFactor) {
this.source = source;
this.timeScaleFactor = timeScaleFactor;
}
public SampleDescriptionBox getSampleDescriptionBox() {
return source.getSampleDescriptionBox();
}
public List<TimeToSampleBox.Entry> getDecodingTimeEntries() {
return adjustTts(source.getDecodingTimeEntries(), timeScaleFactor);
}
public List<CompositionTimeToSample.Entry> getCompositionTimeEntries() {
return adjustCtts(source.getCompositionTimeEntries(), timeScaleFactor);
}
public long[] getSyncSamples() {
return source.getSyncSamples();
}
public List<SampleDependencyTypeBox.Entry> getSampleDependencies() {
return source.getSampleDependencies();
}
public TrackMetaData getTrackMetaData() {
TrackMetaData trackMetaData = (TrackMetaData) source.getTrackMetaData().clone();
trackMetaData.setTimescale(source.getTrackMetaData().getTimescale() * this.timeScaleFactor);
return trackMetaData;
}
public String getHandler() {
return source.getHandler();
}
public boolean isEnabled() {
return source.isEnabled();
}
public boolean isInMovie() {
return source.isInMovie();
}
public boolean isInPreview() {
return source.isInPreview();
}
public boolean isInPoster() {
return source.isInPoster();
}
public List<ByteBuffer> getSamples() {
return source.getSamples();
}
static List<CompositionTimeToSample.Entry> adjustCtts(List<CompositionTimeToSample.Entry> source, int timeScaleFactor) {
if (source != null) {
List<CompositionTimeToSample.Entry> entries2 = new ArrayList<CompositionTimeToSample.Entry>(source.size());
for (CompositionTimeToSample.Entry entry : source) {
entries2.add(new CompositionTimeToSample.Entry(entry.getCount(), timeScaleFactor * entry.getOffset()));
}
return entries2;
} else {
return null;
}
}
static List<TimeToSampleBox.Entry> adjustTts(List<TimeToSampleBox.Entry> source, int timeScaleFactor) {
LinkedList<TimeToSampleBox.Entry> entries2 = new LinkedList<TimeToSampleBox.Entry>();
for (TimeToSampleBox.Entry e : source) {
entries2.add(new TimeToSampleBox.Entry(e.getCount(), timeScaleFactor * e.getDelta()));
}
return entries2;
}
public Box getMediaHeaderBox() {
return source.getMediaHeaderBox();
}
public SubSampleInformationBox getSubsampleInformationBox() {
return source.getSubsampleInformationBox();
}
@Override
public String toString() {
return "MultiplyTimeScaleTrack{" +
"source=" + source +
'}';
}
}
|
