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
|
/**
* Copyright 2023 JogAmp Community. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification, are
* permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this list of
* conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice, this list
* of conditions and the following disclaimer in the documentation and/or other materials
* provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY JogAmp Community ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
* FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL JogAmp Community OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* The views and conclusions contained in the software and documentation are those of the
* authors and should not be interpreted as representing official policies, either expressed
* or implied, of JogAmp Community.
*/
package com.jogamp.common.av;
import com.jogamp.common.os.Clock;
/**
* Presentation Timestamp (PTS) with added System Clock Reference (SCR) via
* {@link #set(long, int)} and its interpolation via {@link #get(long)}, as well as giving raw access via {@link #getLast()}.
* <p>
* The relative millisecond PTS since start of the presentation stored in integer
* covers a time span of 2'147'483'647 ms (see {@link Integer#MAX_VALUE}
* or 2'147'483 seconds or 24.855 days.
* </p>
*/
public final class PTS {
/** An external float value getter */
public static interface FloatValue {
float get();
}
private final FloatValue speed;
/** System Clock Reference (SCR) of last PTS update. */
private volatile long scr;
/** Last updated PTS value */
private volatile int pts;
/**
* Create new instance, initializing pts with {@link TimeFrameI#INVALID_PTS} and system-clock timestamp with zero.
* @param speed external {@link FloatValue} getter for playback speed.
* @see #set(long, int)
*/
public PTS(final FloatValue speed) {
this.speed = speed;
this.scr = 0;
this.pts = TimeFrameI.INVALID_PTS;
}
/**
* Create new instance.
* @param speed external {@link FloatValue} getter for playback speed.
* @param scr System Clock Reference (SCR) in milliseconds of taken pts value, i.e. {@link Clock#currentMillis()}.
* @param pts the presentation timestamp (PTS) in milliseconds
* @see #set(long, int)
*/
public PTS(final FloatValue speed, final long scr, final int pts) {
this.speed = speed;
set(scr, pts);
}
/** Returns true if {@link #getLast()} is unequal to {@link TimeFrameI#INVALID_PTS}. */
public boolean isValid() { return TimeFrameI.INVALID_PTS != pts; }
/** Returns true if {@link #getLast()} equals to {@link TimeFrameI#END_OF_STREAM_PTS}, indicating end of stream (EOS). */
public boolean isEOS() { return TimeFrameI.END_OF_STREAM_PTS == pts; }
/** Returns the System Clock Reference (SCR) in milliseconds of last PTS update via {@link #set(long, int)}. */
public long getSCR() { return scr; }
/** Returns the last updated PTS value via {@link #set(long, int)} w/o System Clock Reference (SCR) interpolation. */
public int getLast() { return pts; }
/** Returns the external playback speed. */
public float getSpeed() { return speed.get(); }
/**
* Updates the PTS value with given System Clock Reference (SCR) in milliseconds.
* @param scr System Clock Reference (SCR) in milliseconds of taken PTS value, i.e. {@link Clock#currentMillis()}.
* @param pts the presentation timestamp (PTS) in milliseconds
*/
public void set(final long scr, final int pts) {
this.scr = scr;
this.pts = pts;
}
/** Sets the PTS value, see {@link #set(long, int)}. */
public void setPTS(final int pts) { this.pts = pts; }
/** Sets the System Clock Reference (SCR) in milliseconds of last PTS update, see {@link #set(long, int)}. */
public void setSCR(final long currentMillis) { scr = currentMillis; }
/**
* Updates the PTS value with values from other {@link PTS} instance.
* @param other source {@link PTS} values
* @see #get(long)
*/
public void set(final PTS other) {
this.scr = other.getSCR();
this.pts = other.getLast();
}
/**
* Returns the {@link #getLast() last updated PTS}, interpolated by {@link #getSCR() System Clock Reference (SCR)} delta to given {@code currentMillis} and playback {@link #getSpeed() speed}.
* <pre>
* last_pts + ( currentMillis - SCR ) * speed
* </pre>
* @param currentMillis current system clock in milliseconds, i.e. {@link Clock#currentMillis()}.
* @see #set(long, int)
*/
public int get(final long currentMillis) {
return pts + (int) ( ( currentMillis - scr ) * speed.get() );
}
/** Returns {@link #getLast()} - rhs.{@link #getLast()}. */
public int diffLast(final PTS rhs) {
return this.pts - rhs.getLast();
}
/** Returns {@link #get(long)} - rhs.{@link #get(long)}. */
public int diff(final long currentMillis, final PTS rhs) {
return get(currentMillis) - rhs.get(currentMillis);
}
@Override
public String toString() { return String.valueOf(pts); }
public String toString(final long currentMillis) { return "last "+pts+" ms, current "+get(currentMillis)+" ms"; }
}
|
