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/*
* Copyright (C) 2012 Apple Inc. 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.
* 3. Neither the name of Apple Inc. ("Apple") nor the names of
* its contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "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 APPLE OR ITS 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.
*/
#ifndef WTF_MediaTime_h
#define WTF_MediaTime_h
#include <wtf/FastMalloc.h>
#include <cmath>
#include <limits>
#include <math.h>
#include <stdint.h>
namespace WTF {
class PrintStream;
class WTF_EXPORT_PRIVATE MediaTime {
WTF_MAKE_FAST_ALLOCATED;
public:
enum {
Valid = 1 << 0,
HasBeenRounded = 1 << 1,
PositiveInfinite = 1 << 2,
NegativeInfinite = 1 << 3,
Indefinite = 1 << 4,
};
MediaTime();
MediaTime(int64_t value, int32_t scale, uint32_t flags = Valid);
MediaTime(const MediaTime& rhs);
~MediaTime();
static MediaTime createWithFloat(float floatTime, int32_t timeScale = DefaultTimeScale);
static MediaTime createWithDouble(double doubleTime, int32_t timeScale = DefaultTimeScale);
float toFloat() const;
double toDouble() const;
MediaTime& operator=(const MediaTime& rhs);
MediaTime& operator+=(const MediaTime& rhs) { return *this = *this + rhs; }
MediaTime& operator-=(const MediaTime& rhs) { return *this = *this - rhs; }
MediaTime operator+(const MediaTime& rhs) const;
MediaTime operator-(const MediaTime& rhs) const;
MediaTime operator-() const;
MediaTime operator*(int32_t) const;
bool operator<(const MediaTime& rhs) const;
bool operator>(const MediaTime& rhs) const;
bool operator!=(const MediaTime& rhs) const;
bool operator==(const MediaTime& rhs) const;
bool operator>=(const MediaTime& rhs) const;
bool operator<=(const MediaTime& rhs) const;
bool operator!() const;
explicit operator bool() const;
typedef enum {
LessThan = -1,
EqualTo = 0,
GreaterThan = 1,
} ComparisonFlags;
ComparisonFlags compare(const MediaTime& rhs) const;
bool isValid() const { return m_timeFlags & Valid; }
bool isInvalid() const { return !isValid(); }
bool hasBeenRounded() const { return m_timeFlags & HasBeenRounded; }
bool isPositiveInfinite() const { return m_timeFlags & PositiveInfinite; }
bool isNegativeInfinite() const { return m_timeFlags & NegativeInfinite; }
bool isIndefinite() const { return m_timeFlags & Indefinite; }
static const MediaTime& zeroTime();
static const MediaTime& invalidTime();
static const MediaTime& positiveInfiniteTime();
static const MediaTime& negativeInfiniteTime();
static const MediaTime& indefiniteTime();
const int64_t& timeValue() const { return m_timeValue; }
const int32_t& timeScale() const { return m_timeScale; }
void dump(PrintStream& out) const;
// Make the following casts errors:
operator double() const = delete;
MediaTime(double) = delete;
operator int() const = delete;
MediaTime(int) = delete;
friend WTF_EXPORT_PRIVATE MediaTime abs(const MediaTime& rhs);
private:
static const int32_t DefaultTimeScale = 10000000;
static const int32_t MaximumTimeScale;
void setTimeScale(int32_t);
int64_t m_timeValue;
int32_t m_timeScale;
uint32_t m_timeFlags;
};
inline MediaTime operator*(int32_t lhs, const MediaTime& rhs) { return rhs.operator*(lhs); }
WTF_EXPORT_PRIVATE extern MediaTime abs(const MediaTime& rhs);
}
using WTF::MediaTime;
using WTF::abs;
#endif
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