KS_COMPRESSION - NtDoc

Native API online documentation, based on the System Informer (formerly Process Hacker) phnt headers 
// ks.h

typedef struct {
  ULONG RatioNumerator;
  ULONG RatioDenominator;
  ULONG RatioConstantMargin;
} KS_COMPRESSION, *PKS_COMPRESSION;

View the official Windows Driver Kit DDI reference

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Windows Driver Kit DDI reference (ns-ks-ks_compression)

KS_COMPRESSION structure

Description

The KS_COMPRESSION structure defines the compression of frames on an output pin.

Members

RatioNumerator

Specifies the numerator of the compression/expansion ratio.

RatioDenominator

Specifies the denominator of the compression/expansion ratio.

RatioConstantMargin

Specifies a scalar constant to apply to the compression ratio. Set this to zero for no compression.

Remarks

For compression, specify a fraction less than 1. For decompression, specify a fraction greater than 1. For example, a compressor might specify 1:3. A decompressor could specify 3:1.

View the official Windows Driver Kit DDI reference

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