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ISpRecoResult::GetAudio

ISpRecoResult::GetAudio creates an audio stream of the requested words from the audio data in the result object.

HRESULT GetAudio(
   ULONG              ulStartElement,
   ULONG              cElements,
   ISpStreamFormat  **ppStream
); 

Parameters

ulStartElement

[in] Value specifying from which element in the result data to start the audio stream.

cElements

[in] Value specifying the total number of words.

ppStream

[out] Address that will receive a pointer to an ISpStreamFormat object containing the audio data requested.

Return values

Remarks

Even if there are no elements, that is, ulStartElement = 0 and cElements = 0, the audio will still be played. There are "unrecognized" results that have no elements but have audio.

An application can find the time offsets for each element by examining the SPPHRASE object retrieved using ISpRecoResult::GetPhrase.

Example

The following code snippet illustrates the use ISpRecoResult::GetAudio to retrieve the retained audio.

    HRESULT hr = S_OK;

    // ... obtain a recognition result object from the recognizer...

    hr = cpRecoResult->GetAudio( 0, 0, &cpStreamFormat );
    // Check hr

    // check the format of the stream for fun...
    hr = cpStreamFormat->GetFormat(&formatId, &pWaveFormatEx);
    // Check hr