一个基于WinCE平台的语音识别例子，利用微软speechAPI5.0

#include <windows.h>
#include <sapi.h>
#include <stdio.h>
#include <string.h>
#include <atlbase.h>
#include "sphelper.h"

inline HRESULT BlockForResult(ISpRecoContext * pRecoCtxt, ISpRecoResult ** ppResult)
{

//创建语音识别
HRESULT hr = S_OK;
CSpEvent event;

while (SUCCEEDED(hr) &&
SUCCEEDED(hr = event.GetFrom(pRecoCtxt)) &&
hr == S_FALSE)
{
hr = pRecoCtxt->WaitForNotifyEvent(INFINITE);
}

*ppResult = event.RecoResult();
if (*ppResult)
{
(*ppResult)->AddRef();

}

return hr;
}

const WCHAR * StopWord()
{
const WCHAR * pchStop;

LANGID LangId = ::SpGetUserDefaultUILanguage();

switch (LangId)
{
case MAKELANGID(LANG_JAPANESE, SUBLANG_DEFAULT):
pchStop = L"/x7d42/x4e86///x30b7/x30e5/x30fc/x30ea/x30e7/x30fc//x3057/x3085/x3046/x308a/x3087/x3046";;
break;

default:
pchStop = L"Stop";
break;
}

return pchStop;
}

int _tmain(int argc, TCHAR* argv[])
{
HRESULT hr = E_FAIL;
bool fUseTTS = true; // turn TTS play back on or off
bool fReplay = true; // turn Audio replay on or off

TCHAR szFileName[256];

// Process optional arguments
if (argc > 1)
{
int i;

for (i = 1; i < argc; i++)
{
if (_tcsicmp(argv[i], _T("-noTTS")) == 0)
{
fUseTTS = false;
continue;
}
if (_tcsicmp(argv[i], _T("-noReplay")) == 0)
{
fReplay = false;
continue;
}
if (_tcsicmp(argv[i], _T("-f")) == 0)
{
if( ++i < argc )
{
_tcscpy(szFileName, argv[i]);
continue;
}
}
#ifndef _WIN32_WCE
printf ("Usage: %s [-noTTS] [-noReplay] /n", argv[0]);
#else
RETAILMSG(TRUE,(_T("Usage: %s [-noTTS] [-noReplay] /n"), argv[0]));
#endif
return hr;
}
}

if (SUCCEEDED(hr = :: CoInitializeEx(NULL,COINIT_MULTITHREADED)))
{
{
CComPtr<ISpRecoContext> cpRecoCtxt;
CComPtr<ISpRecoGrammar> cpGrammar;
CComPtr<ISpVoice> cpVoice;
#ifndef _WIN32_WCE
hr = cpRecoCtxt.CoCreateInstance(CLSID_SpSharedRecoContext);
#else
// CLSID_SpInProcRecoContext is only defined when SAPI_AUTOMATION is
// defined, as a result, the following line doesn't work on CE. As a workaround, I
// create an inproc recognizer and get a reco context from that.
//cpRecoCtxt.CoCreateInstance(CLSID_SpInProcRecoContext);
CComPtr<ISpRecognizer> m_cpEngine;
m_cpEngine.CoCreateInstance(CLSID_SpInprocRecognizer);
m_cpEngine->CreateRecoContext( &cpRecoCtxt );
#endif
if(SUCCEEDED(hr))
{
hr = cpRecoCtxt->GetVoice(&cpVoice);
}

if (!cpRecoCtxt || !cpVoice)
{
hr = E_FAIL;
}
if(SUCCEEDED(hr))
{
hr = cpRecoCtxt->SetNotifyWin32Event();
}
if(SUCCEEDED(hr))
{
hr = cpRecoCtxt->SetInterest(SPFEI(SPEI_RECOGNITION), SPFEI(SPEI_RECOGNITION));
}
if(SUCCEEDED(hr))
{
hr = cpRecoCtxt->SetAudioOptions(SPAO_RETAIN_AUDIO, NULL, NULL);
}
if(SUCCEEDED(hr))
{
hr = cpRecoCtxt->CreateGrammar(0, &cpGrammar);
}
//debug
// if(SUCCEEDED(hr))
// {
// hr = cpGrammar->LoadCmdFromFile( szFileName, SPLO_STATIC );
// }
//debug
if(SUCCEEDED(hr))
{
hr = cpGrammar->LoadDictation(NULL, SPLO_STATIC);
}
if(SUCCEEDED(hr))
{
hr = cpGrammar->SetDictationState(SPRS_ACTIVE);
}
if(SUCCEEDED(hr))
{
USES_CONVERSION;

const WCHAR * const pchStop = StopWord();
CComPtr<ISpRecoResult> cpResult;

#ifndef _WIN32_WCE
printf( "I will repeat everything you say./nSay /"%s/" to exit./n", W2A(pchStop) );
#else
RETAILMSG(TRUE,( _T("I will repeat everything you say./nSay /"%s/" to exit./n"), pchStop));
#endif
if (fUseTTS)
{
cpVoice->Speak( L"I will repeat everything you say.", SPF_ASYNC, NULL);
cpVoice->Speak( L"Say stop to exit.", SPF_ASYNC, NULL);
cpVoice->Speak( L"Say <emph> stop </emph> to exit.", SPF_ASYNC | SPF_IS_XML, NULL);
}

while (SUCCEEDED(hr = BlockForResult(cpRecoCtxt, &cpResult)))
{
cpGrammar->SetDictationState( SPRS_INACTIVE );

CSpDynamicString dstrText;

if (SUCCEEDED(cpResult->GetText(SP_GETWHOLEPHRASE, SP_GETWHOLEPHRASE,
TRUE, &dstrText, NULL)))
{
#ifndef _WIN32_WCE
printf("I heard: %s/n", W2A(dstrText));
#else
RETAILMSG(TRUE,( _T("I heard: %s/n"), dstrText));
#endif

if (fUseTTS)
{
cpVoice->Speak( L"I heard", SPF_ASYNC, NULL);
cpVoice->Speak( dstrText, SPF_ASYNC, NULL );
}

if (fReplay)
{
if (fUseTTS)
cpVoice->Speak( L"when you said", SPF_ASYNC, NULL);
else
{
#ifndef _WIN32_WCE
printf ("/twhen you said.../n");
#else
RETAILMSG(TRUE,( _T("/twhen you said.../n")));
#endif
}
cpResult->SpeakAudio(NULL, 0, NULL, NULL);
}

cpResult.Release();
}
if (_wcsicmp(dstrText, pchStop) == 0)
{
break;
}

cpGrammar->SetDictationState( SPRS_ACTIVE );
}
}
}
::CoUninitialize();
}
return hr;
}

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