// d3dumddi.h

typedef struct _DXVAHDDDI_RATIONAL {
  [in] UINT Numerator;
  [in] UINT Denominator;
} DXVAHDDDI_RATIONAL;
View the official Windows Driver Kit DDI reference

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Windows Driver Kit DDI reference (ns-d3dumddi-_dxvahdddi_rational)

_DXVAHDDDI_RATIONAL structure

Description

The DXVAHDDDI_RATIONAL structure describes a fractional value that represents the vertical and horizontal frequencies of a video mode (that is, vertical sync and horizontal sync).

Members

`Numerator` [in]

The numerator of the frequency fraction.

`Denominator` [in]

The denominator of the frequency fraction.

Remarks

An output rate of 0/0 is valid. The driver interprets 0/0 as 0/1. The driver interprets 0/any value as zero.

The NTSC frame rate is 30000/1001, and the PAL frame rate is 25/1.

View the official Windows Driver Kit DDI reference