Microsoft Speech SDK SAPI 5.1

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ISpStreamFormatConverter::ScaleConvertedToBaseOffset

ISpStreamFormatConverter::ScaleConvertedToBaseOffset maps a stream offset from the converted stream to the equivalent offset in the base stream.

HRESULT ScaleConvertedToBaseOffset(
   ULONGLONG    ullOffsetConvertedStream, 
   ULONGLONG   *pullOffsetBaseStream
);

Parameters

ullOffsetConvertedStream

The offset of the output (converted) stream.

pullOffsetBaseStream

The equivalent offset in the base (unconverted) stream.

Return values

Value	Description
S_OK	Function completed successfully.
E_POINTER	pullOffsetBaseStream is invalid.
SPERR_UNINITIALIZED	The base stream has not been initialized.

Remarks

When performing a mapping with a compressed format, it is possible to introduce small rounding errors, since the content of the audio is not used to perform the conversion.