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
|
/*
* Copyright (C) 2016 The Android Open Source Project
*
* 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 org.mozilla.thirdparty.com.google.android.exoplayer2.extractor;
import org.mozilla.thirdparty.com.google.android.exoplayer2.util.Util;
import java.util.Arrays;
/**
* Defines chunks of samples within a media stream.
*/
public final class ChunkIndex implements SeekMap {
/**
* The number of chunks.
*/
public final int length;
/**
* The chunk sizes, in bytes.
*/
public final int[] sizes;
/**
* The chunk byte offsets.
*/
public final long[] offsets;
/**
* The chunk durations, in microseconds.
*/
public final long[] durationsUs;
/**
* The start time of each chunk, in microseconds.
*/
public final long[] timesUs;
private final long durationUs;
/**
* @param sizes The chunk sizes, in bytes.
* @param offsets The chunk byte offsets.
* @param durationsUs The chunk durations, in microseconds.
* @param timesUs The start time of each chunk, in microseconds.
*/
public ChunkIndex(int[] sizes, long[] offsets, long[] durationsUs, long[] timesUs) {
this.sizes = sizes;
this.offsets = offsets;
this.durationsUs = durationsUs;
this.timesUs = timesUs;
length = sizes.length;
if (length > 0) {
durationUs = durationsUs[length - 1] + timesUs[length - 1];
} else {
durationUs = 0;
}
}
/**
* Obtains the index of the chunk corresponding to a given time.
*
* @param timeUs The time, in microseconds.
* @return The index of the corresponding chunk.
*/
public int getChunkIndex(long timeUs) {
return Util.binarySearchFloor(timesUs, timeUs, true, true);
}
// SeekMap implementation.
@Override
public boolean isSeekable() {
return true;
}
@Override
public long getDurationUs() {
return durationUs;
}
@Override
public SeekPoints getSeekPoints(long timeUs) {
int chunkIndex = getChunkIndex(timeUs);
SeekPoint seekPoint = new SeekPoint(timesUs[chunkIndex], offsets[chunkIndex]);
if (seekPoint.timeUs >= timeUs || chunkIndex == length - 1) {
return new SeekPoints(seekPoint);
} else {
SeekPoint nextSeekPoint = new SeekPoint(timesUs[chunkIndex + 1], offsets[chunkIndex + 1]);
return new SeekPoints(seekPoint, nextSeekPoint);
}
}
@Override
public String toString() {
return "ChunkIndex("
+ "length="
+ length
+ ", sizes="
+ Arrays.toString(sizes)
+ ", offsets="
+ Arrays.toString(offsets)
+ ", timeUs="
+ Arrays.toString(timesUs)
+ ", durationsUs="
+ Arrays.toString(durationsUs)
+ ")";
}
}
|
