ISpRecoContext::Resume (SAPI 5.4)

Article
08/26/2009

Microsoft Speech API 5.4

ISpRecoContext::Resume

ISpRecoContext::Resume releases the SR engine from the paused state and restarts the recognition process.

  
    HRESULT  Resume (
  DWORD dwReserved
);

Parameters

dwReserved
[in] Reserved, must be zero.

Return values

Value

S_OK

E_INVALIDARG

Remarks

This method must be called after a call to ISpRecoContext::Pause, a bookmark event occurs that pauses the recognition engine, or an auto-pause rule is recognized (see ISpRecoGrammar::SetRuleState).

The caller must call Resume once for every call that is made to ISpRecoContext::Pause.

Example

The following code snippet illustrates the use of ISpRecoContext::Resume after a call to ISpRecoContext::Pause

  
// Declare local identifiers:
HRESULT	                   hr = S_OK;
CComPtr<ISpRecoContext>    cpRecoContext;

// Set up the recognition context.
// ...

// Pause the context so that event notifications are not received.
hr = cpRecoContext->Pause(NULL);

if (SUCCEEDED(hr))
{
   // Quickly perform the processing - see the
   // Remarks section in ISpRecoContext::Pause.
   // ...

   hr = cpRecoContext->Resume(NULL);
}

// Applications will start receiving event notifications again.
if (SUCCEEDED(hr))
{
   // Do stuff here.
}

The following code snippet illustrates the use of ISpRecoContext::Resume with an "auto-pause" rule.

  
// Declare local identifiers:
HRESULT	                   hr = S_OK;
CComPtr<ISpRecoContext>    cpRecoContext;
CComPtr<ISpRecoGrammar>    cpRecoGrammar;
const WCHAR                *MY_AUTOPAUSE_RULE = L"Rule1";
const WCHAR                *MY_SECOND_RULE = L"Rule2";

// Set up the recognition context and grammar.
// ...

// Activate a top-level rule as an "auto-pause" rule.
hr = cpRecoGrammar->SetRuleState(MY_AUTOPAUSE_RULE, NULL, SPRS_ACTIVE_WITH_AUTO_PAUSE);

if (SUCCEEDED(hr))
{
   // Get the recognition event for MY_AUTOPAUSE_RULE in a CSpEvent object.
   // ...
}

// Assert that the recognition context paused
// after the "auto-pause" rule was recognized.
_ASSERT(spEvent.IsPaused());

// Deactivate the "auto-pause" rule.
hr = cpRecoGrammar->SetRuleState(MY_AUTOPAUSE_RULE, NULL, SPRS_INACTIVE);

if (SUCCEEDED(hr))
{
   // Activate the second rule.
   hr = cpRecoGrammar->SetRuleState(MY_SECOND_RULE, NULL, SPRS_ACTIVE);
}

if (SUCCEEDED(hr))
{
   // Because the context was paused from the "auto-pause" rule,
   // it must now be reactivated to recognize the second rule.
   hr = cpRecoContext->Resume(NULL);
}

if (SUCCEEDED(hr))
{
   // Get the second recognition...
}

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