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 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#ifndef WTF_MediaTime_h
30#define WTF_MediaTime_h
31
32#include <wtf/FastMalloc.h>
33
34#include <cmath>
35#include <limits>
36#include <math.h>
37#include <stdint.h>
38
39namespace WTF {
40
41class PrintStream;
42
43class WTF_EXPORT_PRIVATE MediaTime {
44 WTF_MAKE_FAST_ALLOCATED;
45public:
46 enum {
47 Valid = 1 << 0,
48 HasBeenRounded = 1 << 1,
49 PositiveInfinite = 1 << 2,
50 NegativeInfinite = 1 << 3,
51 Indefinite = 1 << 4,
52 DoubleValue = 1 << 5,
53 };
54
55 MediaTime();
56 MediaTime(int64_t value, int32_t scale, uint32_t flags = Valid);
57 MediaTime(const MediaTime& rhs);
58 ~MediaTime();
59
60 static MediaTime createWithFloat(float floatTime);
61 static MediaTime createWithFloat(float floatTime, int32_t timeScale);
62 static MediaTime createWithDouble(double doubleTime);
63 static MediaTime createWithDouble(double doubleTime, int32_t timeScale);
64
65 float toFloat() const;
66 double toDouble() const;
67
68 MediaTime& operator=(const MediaTime& rhs);
69 MediaTime& operator+=(const MediaTime& rhs) { return *this = *this + rhs; }
70 MediaTime& operator-=(const MediaTime& rhs) { return *this = *this - rhs; }
71 MediaTime operator+(const MediaTime& rhs) const;
72 MediaTime operator-(const MediaTime& rhs) const;
73 MediaTime operator-() const;
74 MediaTime operator*(int32_t) const;
75 bool operator<(const MediaTime& rhs) const;
76 bool operator>(const MediaTime& rhs) const;
77 bool operator!=(const MediaTime& rhs) const;
78 bool operator==(const MediaTime& rhs) const;
79 bool operator>=(const MediaTime& rhs) const;
80 bool operator<=(const MediaTime& rhs) const;
81 bool operator!() const;
82 explicit operator bool() const;
83
84 typedef enum {
85 LessThan = -1,
86 EqualTo = 0,
87 GreaterThan = 1,
88 } ComparisonFlags;
89
90 ComparisonFlags compare(const MediaTime& rhs) const;
91
92 bool isValid() const { return m_timeFlags & Valid; }
93 bool isInvalid() const { return !isValid(); }
94 bool hasBeenRounded() const { return m_timeFlags & HasBeenRounded; }
95 bool isPositiveInfinite() const { return m_timeFlags & PositiveInfinite; }
96 bool isNegativeInfinite() const { return m_timeFlags & NegativeInfinite; }
97 bool isIndefinite() const { return m_timeFlags & Indefinite; }
98 bool hasDoubleValue() const { return m_timeFlags & DoubleValue; }
99
100 static const MediaTime& zeroTime();
101 static const MediaTime& invalidTime();
102 static const MediaTime& positiveInfiniteTime();
103 static const MediaTime& negativeInfiniteTime();
104 static const MediaTime& indefiniteTime();
105
106 const int64_t& timeValue() const { return m_timeValue; }
107 const int32_t& timeScale() const { return m_timeScale; }
108
109 void dump(PrintStream& out) const;
110
111 // Make the following casts errors:
112 operator double() const = delete;
113 MediaTime(double) = delete;
114 operator int() const = delete;
115 MediaTime(int) = delete;
116
117 friend WTF_EXPORT_PRIVATE MediaTime abs(const MediaTime& rhs);
118
119 static const int32_t DefaultTimeScale = 10000000;
120 static const int32_t MaximumTimeScale;
121
122private:
123 void setTimeScale(int32_t);
124
125 union {
126 int64_t m_timeValue;
127 double m_timeValueAsDouble;
128 };
129 int32_t m_timeScale;
130 uint32_t m_timeFlags;
131};
132
133inline MediaTime operator*(int32_t lhs, const MediaTime& rhs) { return rhs.operator*(lhs); }
134
135WTF_EXPORT_PRIVATE extern MediaTime abs(const MediaTime& rhs);
136}
137
138using WTF::MediaTime;
139using WTF::abs;
140
141#endif
142