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1 /* | |
2 * Copyright (C) 2012 Apple Inc. All rights reserved. | |
3 * | |
4 * Redistribution and use in source and binary forms, with or without | |
5 * modification, are permitted provided that the following conditions | |
6 * are met: | |
7 * | |
8 * 1. Redistributions of source code must retain the above copyright | |
9 * notice, this list of conditions and the following disclaimer. | |
10 * 2. Redistributions in binary form must reproduce the above copyright | |
11 * notice, this list of conditions and the following disclaimer in the | |
12 * documentation and/or other materials provided with the distribution. | |
13 * 3. Neither the name of Apple Computer, Inc. ("Apple") nor the names of | |
14 * its contributors may be used to endorse or promote products derived | |
15 * from this software without specific prior written permission. | |
16 * | |
17 * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY | |
18 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED | |
19 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE | |
20 * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY | |
21 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES | |
22 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; | |
23 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND | |
24 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF | |
26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
27 */ | |
28 | |
29 #include "FastAllocBase.h" | |
30 | |
31 #include <cmath> | |
32 #include <limits> | |
33 #include <math.h> | |
34 #include <stdint.h> | |
35 | |
36 namespace WTF { | |
37 | |
38 class WTF_EXPORT_PRIVATE MediaTime { | |
39 WTF_MAKE_FAST_ALLOCATED; | |
40 public: | |
41 enum { | |
42 Valid = 1 << 0, | |
43 HasBeenRounded = 1 << 1, | |
44 PositiveInfinite = 1 << 2, | |
45 NegativeInfinite = 1 << 3, | |
46 Indefinite = 1 << 4, | |
47 }; | |
48 | |
49 MediaTime(); | |
50 MediaTime(int64_t value, int32_t scale = DefaultTimeScale, uint32_t flags =
Valid); | |
51 MediaTime(const MediaTime& rhs); | |
52 ~MediaTime(); | |
53 | |
54 static MediaTime createWithFloat(float floatTime, int32_t timeScale = Defaul
tTimeScale); | |
55 static MediaTime createWithDouble(double doubleTime, int32_t timeScale = Def
aultTimeScale); | |
56 | |
57 float toFloat() const; | |
58 double toDouble() const; | |
59 | |
60 MediaTime& operator=(const MediaTime& rhs); | |
61 MediaTime operator+(const MediaTime& rhs) const; | |
62 MediaTime operator-(const MediaTime& rhs) const; | |
63 bool operator<(const MediaTime& rhs) const; | |
64 bool operator>(const MediaTime& rhs) const; | |
65 bool operator==(const MediaTime& rhs) const; | |
66 bool operator>=(const MediaTime& rhs) const; | |
67 bool operator<=(const MediaTime& rhs) const; | |
68 | |
69 typedef enum { | |
70 LessThan = -1, | |
71 EqualTo = 0, | |
72 GreaterThan = 1, | |
73 } ComparisonFlags; | |
74 | |
75 ComparisonFlags compare(const MediaTime& rhs) const; | |
76 | |
77 bool isValid() const { return m_timeFlags & Valid; } | |
78 bool isInvalid() const { return !isValid(); } | |
79 bool hasBeenRounded() const { return m_timeFlags & HasBeenRounded; } | |
80 bool isPositiveInfinite() const { return m_timeFlags & PositiveInfinite; } | |
81 bool isNegativeInfinite() const { return m_timeFlags & NegativeInfinite; } | |
82 bool isIndefinite() const { return m_timeFlags & Indefinite; } | |
83 | |
84 static const MediaTime& zeroTime(); | |
85 static const MediaTime& invalidTime(); | |
86 static const MediaTime& positiveInfiniteTime(); | |
87 static const MediaTime& negativeInfiniteTime(); | |
88 static const MediaTime& indefiniteTime(); | |
89 | |
90 const int64_t& timeValue() const { return m_timeValue; } | |
91 const int32_t& timeScale() const { return m_timeScale; } | |
92 | |
93 friend WTF_EXPORT_PRIVATE MediaTime abs(const MediaTime& rhs); | |
94 private: | |
95 static const int32_t DefaultTimeScale = 6000; | |
96 static const int32_t MaximumTimeScale; | |
97 | |
98 void setTimeScale(int32_t); | |
99 | |
100 int64_t m_timeValue; | |
101 int32_t m_timeScale; | |
102 uint32_t m_timeFlags; | |
103 }; | |
104 | |
105 WTF_EXPORT_PRIVATE extern MediaTime abs(const MediaTime& rhs); | |
106 } | |
107 | |
108 using WTF::MediaTime; | |
109 using WTF::abs; | |
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