WICJpegFrameHeader structure (wincodec.h)

Represents a JPEG frame header.

Syntax

typedef struct WICJpegFrameHeader {
  UINT                  Width;
  UINT                  Height;
  WICJpegTransferMatrix TransferMatrix;
  WICJpegScanType       ScanType;
  UINT                  cComponents;
  DWORD                 ComponentIdentifiers;
  DWORD                 SampleFactors;
  DWORD                 QuantizationTableIndices;
} WICJpegFrameHeader;

Members

Width

The width of the JPEG frame.

Height

The height of the JPEG frame.

TransferMatrix

The transfer matrix of the JPEG frame.

ScanType

The scan type of the JPEG frame.

cComponents

The number of components in the frame.

ComponentIdentifiers

The component identifiers.

SampleFactors

The sample factors. Use one of the following constants, described in IWICJpegFrameDecode Constants.

  • WIC_JPEG_SAMPLE_FACTORS_ONE
  • WIC_JPEG_SAMPLE_FACTORS_THREE_420
  • WIC_JPEG_SAMPLE_FACTORS_THREE_422
  • WIC_JPEG_SAMPLE_FACTORS_THREE_440
  • WIC_JPEG_SAMPLE_FACTORS_THREE_444

QuantizationTableIndices

The format of the quantization table indices. Use one of the following constants, described in IWICJpegFrameDecode Constants.

  • WIC_JPEG_QUANTIZATION_BASELINE_ONE
  • WIC_JPEG_QUANTIZATION_BASELINE_THREE

Remarks

Get the frame header for an image by calling IWICJpegFrameDecode::GetFrameHeader.

Requirements

   
Header wincodec.h

See also

IWICJpegFrameDecode::GetFrameHeader