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IWICJpegFrameEncode::GetQuantizationTable method (wincodec.h)

  • Article

Retrieves a copy of the quantization table.

Syntax

HRESULT GetQuantizationTable(
        UINT                         scanIndex,
        UINT                         tableIndex,
  [out] DXGI_JPEG_QUANTIZATION_TABLE *pQuantizationTable
);

Parameters

scanIndex

Type: UINT

The zero-based index of the scan for which data is retrieved.

tableIndex

Type: UINT

The index of the quantization table to retrieve.

[out] pQuantizationTable

Type: DXGI_JPEG_QUANTIZATION_TABLE*

A pointer that receives the table data. This parameter must not be NULL.

Return value

Type: HRESULT

This method can return one of these values.

Return value Description
S_OK
 The operation was successful.
WINCODEC_ERR_INVALIDJPEGSCANINDEX
The specified scan index is invalid.
WINCODEC_ERR_INVALIDPARAMETER
 Can occur if pTable is NULL or if tableIndex does not point to a valid table slot. Check the scan header for valid table indices.

Requirements

Requirement Value
Minimum supported client Windows 10 [desktop apps only]
Minimum supported server Windows Server 2016 [desktop apps only]
Target Platform Windows
Header wincodec.h
Library Windowscodecs.lib
DLL Windowscodecs.dll

See also

IWICJpegFrameEncode