Microsoft Speech SDK SAPI 5.1

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ISpStreamFormatConverter::ScaleBaseToConvertedOffset

ISpStreamFormatConverter::ScaleBaseToConvertedOffset converts an offset in the base stream into the equivalent offset in the converted stream. This method is primarily used internally to map event offsets.

HRESULT ScaleBaseToConvertedOffset(
   ULONGLONG   ullOffsetBaseStream,
   ULONGLONG  *pullOffsetConvertedStream
);

Parameters

ullOffsetBaseStream

The current offset in the base (unconverted) stream.

pullOffsetConvertedStream

The new offset in the output (converted) stream.

Return values

Value	Description
S_OK	Function completed successfully.
E_POINTER	pullOffsetConvertedStream is bad or invalid.
SPERR_UNINITIALIZED	The base stream is not initialized.
E_INVALIDARG	ullOffsetBaseStream is less than the initial seek position of the current steam.  *pullOffsetConvertedStream is set to 0xFFFFFFFFFFFFFFFF.

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.