Microsoft Speech SDK
SAPI 5.1
ISpSREngineSite::DataAvailable
ISpSREngineSite::DataAvailable retrieves the amount of data that can be read using ISpSREngineSite::Read without blocking.
This method can only be called while the SR engine is inside a ISpSREngine::RecognizeStream call, although it can be called on any thread.
HRESULT DataAvailable(
ULONG *pcb
);
Parameters
- pcb
- [out] The amount, in bytes, of data available. For real-time audio streams this is the actual amount of data currently available. For non real-time streams this method will always return the value INFINITE. Using the fRealTimeAudio parameter on the RecognizeStream method, engines can determine whether this is a real-time stream.
Return values
| Value | Description |
|---|---|
| S_OK | Function completed successfully. |
| E_POINTER | pcb is a bad write pointer. |
| SPERR_STREAM_NOT_ACTIVE | Method called when engine is not inside RecognizeStream call. |
| FAILED(hr) | Other appropriate error message. |