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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.
*/
#pragma once
#include <wtf/FastMalloc.h>
#include <wtf/JSONValues.h>
#include <wtf/Seconds.h>
#include <wtf/text/WTFString.h>
#include <cmath>
#include <limits>
#include <math.h>
#include <stdint.h>
namespace WTF {
class PrintStream;
class WTF_EXPORT_PRIVATE MediaTime final {
WTF_MAKE_FAST_ALLOCATED;
public:
enum {
Valid = 1 << 0,
HasBeenRounded = 1 << 1,
PositiveInfinite = 1 << 2,
NegativeInfinite = 1 << 3,
Indefinite = 1 << 4,
DoubleValue = 1 << 5,
};
constexpr MediaTime();
constexpr MediaTime(int64_t value, uint32_t scale, uint8_t flags = Valid);
MediaTime(const MediaTime&) = default;
static MediaTime createWithFloat(float floatTime);
static MediaTime createWithFloat(float floatTime, uint32_t timeScale);
static MediaTime createWithDouble(double doubleTime);
static MediaTime createWithDouble(double doubleTime, uint32_t timeScale);
static MediaTime createWithSeconds(Seconds seconds) { return createWithDouble(seconds.value()); }
float toFloat() const;
double toDouble() const;
int64_t toMicroseconds() const;
MediaTime& operator=(const MediaTime&) = default;
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 { return compare(rhs) == LessThan; }
bool operator>(const MediaTime& rhs) const { return compare(rhs) == GreaterThan; }
bool operator==(const MediaTime& rhs) const { return compare(rhs) == EqualTo; }
bool operator>=(const MediaTime& rhs) const { return compare(rhs) >= EqualTo; }
bool operator<=(const MediaTime& rhs) const { return compare(rhs) <= EqualTo; }
bool operator!() const;
explicit operator bool() const;
typedef enum {
LessThan = -1,
EqualTo = 0,
GreaterThan = 1,
} ComparisonFlags;
ComparisonFlags compare(const MediaTime& rhs) const;
bool isBetween(const MediaTime&, const MediaTime&) 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; }
bool isFinite() const { return !isInvalid() && !isIndefinite() && !isPositiveInfinite() && !isNegativeInfinite(); }
bool hasDoubleValue() const { return m_timeFlags & DoubleValue; }
uint8_t timeFlags() const { return m_timeFlags; }
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 uint32_t& timeScale() const { return m_timeScale; }
void dump(PrintStream& out) const;
String toString() const;
String toJSONString() const;
Ref<JSON::Object> toJSONObject() 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);
static const uint32_t DefaultTimeScale = 10000000;
static const uint32_t MaximumTimeScale;
enum class RoundingFlags {
HalfAwayFromZero = 0,
TowardZero,
AwayFromZero,
TowardPositiveInfinity,
TowardNegativeInfinity,
};
MediaTime toTimeScale(uint32_t, RoundingFlags = RoundingFlags::HalfAwayFromZero) const;
MediaTime isolatedCopy() const;
private:
void setTimeScale(uint32_t, RoundingFlags = RoundingFlags::HalfAwayFromZero);
union {
int64_t m_timeValue;
double m_timeValueAsDouble;
};
uint32_t m_timeScale;
uint8_t m_timeFlags;
};
constexpr MediaTime::MediaTime()
: m_timeValue(0)
, m_timeScale(DefaultTimeScale)
, m_timeFlags(Valid)
{
}
constexpr MediaTime::MediaTime(int64_t value, uint32_t scale, uint8_t flags)
: m_timeValue(value)
, m_timeScale(scale)
, m_timeFlags(flags)
{
if (scale || !(flags & Valid))
return;
if (value < 0) {
// Negative infinite time
m_timeValue = -1;
m_timeScale = 1;
m_timeFlags = NegativeInfinite | Valid;
} else {
// Positive infinite time
m_timeValue = 0;
m_timeScale = 1;
m_timeFlags = PositiveInfinite | Valid;
}
}
inline MediaTime operator*(int32_t lhs, const MediaTime& rhs) { return rhs.operator*(lhs); }
WTF_EXPORT_PRIVATE extern MediaTime abs(const MediaTime& rhs);
struct WTF_EXPORT_PRIVATE MediaTimeRange {
WTF_MAKE_STRUCT_FAST_ALLOCATED;
String toJSONString() const;
const MediaTime start;
const MediaTime end;
};
template<typename> struct LogArgument;
template<> struct LogArgument<MediaTime> {
static String toString(const MediaTime& time) { return time.toJSONString(); }
};
template<> struct LogArgument<MediaTimeRange> {
static String toString(const MediaTimeRange& range) { return range.toJSONString(); }
};
WTF_EXPORT_PRIVATE TextStream& operator<<(TextStream&, const MediaTime&);
}
using WTF::MediaTime;
using WTF::MediaTimeRange;
using WTF::abs;
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