StormByte::Multimedia::FFmpeg::AVRational Class Reference

Pair {num, den} matching libavutil AVRational. More...

#include <StormByte/multimedia/property/av_rational.hxx>

Public Member Functions
constexpr	AVRational () noexcept=default
	{0, 1} — unknown / unset.
constexpr	AVRational (int num, int den) noexcept
	{num, den} like the C aggregate.
constexpr bool	Valid () const noexcept
	True when both sides are positive.
constexpr double	ToDouble () const noexcept
	av_q2d — num / den as double.
std::int64_t	Rescale (std::int64_t ticks, const AVRational &dst) const noexcept
	av_rescale_q(ticks, *this, dst).
constexpr bool	operator== (const AVRational &other) const noexcept
	Equality.
constexpr bool	operator!= (const AVRational &other) const noexcept
	Inequality.

Public Attributes
int	num = 0
	Numerator (AVRational.num).
int	den = 1
	Denominator (AVRational.den).

Detailed Description

Pair {num, den} matching libavutil AVRational.

Public fields so fps.num, fps.den and AVRational{24000, 1001} read like the C API. This is not libav's header: plugins that include libavutil/rational.h still use ::AVRational for the C struct. Convert with {r.num, r.den}.

23.976 fps is {24000, 1001}. 24 fps is {24, 1}. A time base of 1 ms is {1, 1000}.

Constructor & Destructor Documentation

AVRational() [1/2]

StormByte::Multimedia::Property::AVRational::AVRational ( )

constexprdefaultnoexcept

{0, 1} — unknown / unset.

AVRational() [2/2]

StormByte::Multimedia::Property::AVRational::AVRational ( int num, int den )

inlineconstexprnoexcept

{num, den} like the C aggregate.

Parameters

num	Numerator.
den	Denominator.

Member Function Documentation

operator!=()

bool StormByte::Multimedia::Property::AVRational::operator!= ( const AVRational & other ) const

inlineconstexprnoexcept

Inequality.

Parameters

other

Other rational.

Returns

true if num or den differ.

operator==()

bool StormByte::Multimedia::Property::AVRational::operator== ( const AVRational & other ) const

inlineconstexprnoexcept

Equality.

Parameters

other

Other rational.

Returns

true if num and den match.

Rescale()

std::int64_t StormByte::Multimedia::Property::AVRational::Rescale ( std::int64_t ticks, const AVRational & dst ) const

noexcept

av_rescale_q(ticks, *this, dst).

Parameters

ticks	Source ticks.
dst	Destination time base.

Returns

Scaled ticks, or AV_NOPTS_VALUE when either side is invalid.

ToDouble()

double StormByte::Multimedia::Property::AVRational::ToDouble ( ) const

inlineconstexprnoexcept

av_q2d — num / den as double.

Returns

Quotient, or 0 if den == 0.

Valid()

bool StormByte::Multimedia::Property::AVRational::Valid ( ) const

inlineconstexprnoexcept

True when both sides are positive.

Returns

true if num > 0 && den > 0.

Member Data Documentation

den

int StormByte::Multimedia::Property::AVRational::den = 1

Denominator (AVRational.den).

num

int StormByte::Multimedia::Property::AVRational::num = 0

Numerator (AVRational.num).

---

The documentation for this class was generated from the following file:

• lib/public/StormByte/multimedia/property/av_rational.hxx