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ISpRecoGrammar::LoadCmdFromMemory (SAPI 5.4)

Speech API 5.4
Microsoft Speech API 5.4

ISpRecoGrammar::LoadCmdFromMemory

ISpRecoGrammar::LoadCmdFromMemory loads a compiled CFG binary from memory.

HRESULT LoadCmdFromMemory(
   const SPBINARYGRAMMAR   *pBinaryData,
   SPLOADOPTIONS            Options
);

Parameters

pBinaryData
[in] The serialized header buffer of type SPBINARYGRAMMAR.
Options
[in] Flag of type SPLOADOPTIONS indicating whether the file should be loaded statically or dynamically.

Remarks

When an application calls ::LoadCmdFromMemory, the currently loaded CFG or proprietary grammar will be unloaded.

Return values

ValueDescription
S_OKFunction completed successfully.
E_INVALIDARGEither pBinaryData or one of its members is invalid or bad. It may also indicate pBinaryData->FormatId is not SPGDF_ContextFree. Alternatively, Options is neither SPLO_STATIC nor SPLO_DYNAMIC.
FAILED(hr)Appropriate error message.

Example

The following code snippet illustrates how to use ISpRecoGrammar::LoadCmdFromMemory to serialize the CFG from one SpRecoGrammar object and deserialize it into another SpRecoGrammar object.


// Declare local identifiers:
HRESULT                      hr = S_OK;
CComPtr<ISpRecoGrammar>      cpRecoGrammar;
CComPtr<ISpRecoGrammar>      cpReloadedGrammar;
CComPtr<ISpRecoContext>      cpRecoContext;
CComPtr<IStream>             cpHStream;
HGLOBAL                      hGrammar;

// Build and use a SpRecoGrammar object...

// Create a Win32 global stream.
hr = ::CreateStreamOnHGlobal(NULL, true, &cpHStream;);

if (SUCCEEDED(hr))
{
   // Save the current grammar to the global stream.
   hr = cpRecoGrammar->SaveCmd(cpHStream, NULL);
}

if (SUCCEEDED(hr))
{
   // Create the second grammar to deserialize into.
   hr = cpRecoContext->CreateGrammar(0, &cpReloadedGrammar;);
}

if (SUCCEEDED(hr))
{
   // Get a handle to the stream with the serialized grammar.
   ::GetHGlobalFromStream(cpHStream, &hGrammar;);
}

// Deserialize the CFG into a new grammar object.
hr = cpReloadedGrammar->LoadCmdFromMemory((SPBINARYGRAMMAR *)::GlobalLock(hGrammar), SPLO_DYNAMIC);

if (SUCCEEDED(hr))
{
   // Do stuff here.
}
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