www.pudn.com > ruier_TTS_SR(vc6).rar > SpeechRecognition.cpp

// SpeechRecognition.cpp: implementation of the CSpeechRecognition class. 
// 
////////////////////////////////////////////////////////////////////// 
 
#include "stdafx.h" 
#include "TTS_SR.h" 
#include "SpeechRecognition.h" 
 
#ifdef _DEBUG 
#undef THIS_FILE 
static char THIS_FILE[]=__FILE__; 
#define new DEBUG_NEW 
#endif 
 
////////////////////////////////////////////////////////////////////// 
// Construction/Destruction 
////////////////////////////////////////////////////////////////////// 
 
CSpeechRecognition::CSpeechRecognition() 
{ 
 
} 
 
CSpeechRecognition::~CSpeechRecognition() 
{ 
 
} 
 
//初始化函数Initialize设定了语音识别引擎的基本工作环境，包括引擎、识别上下文、语法、音频和事件等的初始化 
 
BOOL CSpeechRecognition::Initialize(HWND hWnd,int nIDDlgItem, BOOL bIsShared) 
{ 
    // 初始化com库 
    if (FAILED(CoInitialize(NULL)))  
    { 
        m_sError=_T("Error intialization COM"); 
        return FALSE; 
    } 
    // 初始化识别引擎 
    HRESULT hr = S_OK; 
    if (bIsShared) 
    { 
        // 设置是否为共享语音识别 
        hr = m_cpRecoEngine.CoCreateInstance( CLSID_SpSharedRecognizer ); 
    } 
    else 
    { 
        hr = m_cpRecoEngine.CoCreateInstance(CLSID_SpInprocRecognizer); 
    } 
    // RecoContext接口 
    if( SUCCEEDED( hr ) ) 
    { 
        hr = m_cpRecoEngine->CreateRecoContext( &m_cpRecoCtxt ); 
    } 
    // 设置消息通知 
    if (SUCCEEDED(hr)) 
    { 
        hr = m_cpRecoCtxt->SetNotifyWindowMessage( hWnd, WM_SREVENT, 0, 0 ); 
    } 
    if (SUCCEEDED(hr)) 
    { 
        // 设置感兴趣的消息 
        hr = m_cpRecoCtxt->SetInterest(SPFEI(SPEI_RECOGNITION), SPFEI(SPEI_RECOGNITION)); 
    } 
    // 设置输入为默认输入 
    CComPtr cpAudio; 
    hr = SpCreateDefaultObjectFromCategoryId(SPCAT_AUDIOIN, &cpAudio); 
    // 设置输入 
    hr = m_cpRecoEngine->SetInput(cpAudio, TRUE); 
    hr = m_cpRecoEngine->SetRecoState( SPRST_ACTIVE ); 
    // grammar 
    if (SUCCEEDED(hr)) 
    { 
        // 设置听写时想用的语法 
        // 初始化语法接口 
        hr = m_cpRecoCtxt->CreateGrammar( 0, &m_cpDictationGrammar ); 
    } 
    if  (SUCCEEDED(hr)) 
    { 
        hr = m_cpDictationGrammar->LoadDictation(NULL, SPLO_STATIC); 
    } 
    if (SUCCEEDED(hr)) 
    { 
        hr = m_cpDictationGrammar->SetDictationState( SPRS_ACTIVE ); 
    } 
    if (FAILED(hr)) 
    { 
        m_cpDictationGrammar.Release(); 
    } 
	 InitTokenList(hWnd,nIDDlgItem); 
    return (hr == S_OK); 
} 
 
 
void CSpeechRecognition::Destroy() 
{ 
    if (m_cpDictationGrammar)  
        m_cpDictationGrammar.Release(); 
    if (m_cpRecoCtxt)  
        m_cpRecoCtxt.Release(); 
    if (m_cpRecoEngine)  
        m_cpRecoEngine.Release(); 
    CoUninitialize(); 
} 
 
//函数Start和Stop用来控制开始和停止接受及识别语音，它们通过调用引擎接口的SetRecoState方法来实现 
 
BOOL CSpeechRecognition::Start() 
{ 
    if (m_bOnDictation) 
        return TRUE; 
       HRESULT hr = m_cpRecoEngine->SetRecoState( SPRST_ACTIVE ); 
    if (FAILED(hr)) 
        return FALSE; 
    m_bOnDictation = TRUE; 
    return TRUE; 
} 
 
  
 
BOOL CSpeechRecognition::Stop() 
{ 
    if (! m_bOnDictation) 
        return TRUE; 
       HRESULT hr = m_cpRecoEngine->SetRecoState( SPRST_INACTIVE ); 
    if (FAILED(hr)) 
		return FALSE; 
    m_bOnDictation = FALSE; 
    return TRUE; 
} 
 
//函数GetText是获取从语音中已识别出的文字的关键，应该在响应事件消息的函数中调用，其代码如下所示。 
 
void CSpeechRecognition::GetText(WCHAR **ppszCoMemText, ULONG ulStart, ULONG nlCount) 
{ 
    USES_CONVERSION;//USES_CONVERSION是专门为字符串类型转换宏如A2OLE()定义变量的宏。 
					//如果要使用这些宏，就必须在函数的开始加入USES_CONVERSION宏。 
    CSpEvent event; 
    // 处理所有的声音识别的事件 
    while (event.GetFrom(m_cpRecoCtxt) == S_OK)//消息队列中还有消息 
    { 
        switch (event.eEventId) 
        { 
            case SPEI_RECOGNITION: 
                 
                { 
                    HRESULT hr = S_OK; 
					//两种得到短语的方法，没看懂，默认用第一个就行了 
                    if (nlCount == -1) 
                        event.RecoResult()->GetText(SP_GETWHOLEPHRASE, SP_GETWHOLEPHRASE, TRUE, ppszCoMemText, NULL); 
                    else 
                    { 
                        ASSERT(nlCount > 0);//调试用，不满足条件则中断 
                        event.RecoResult()->GetText(ulStart, nlCount, FALSE, ppszCoMemText, NULL); 
                    } 
                } 
                break; 
        } 
    } 
} 
 
//函数InitTokenList调用SpInitTokenComboBox和SpInitTokenListBox函数来实现语音语言在列表或组合列表中的列表显示和选择 
 
HRESULT CSpeechRecognition::InitTokenList(HWND hWnd,int nIDDlgItem ) 
{ 
     
        return SpInitTokenComboBox(GetDlgItem(hWnd,nIDDlgItem), SPCAT_RECOGNIZERS); 
    
} 
 
HRESULT CSpeechRecognition::SetVoice(HWND hWnd,int nIDDlgItem) 
{ 
    HRESULT hr = S_OK; 
	CComPtr g_cpVoice; 
	hr = m_cpRecoCtxt->GetVoice(&g_cpVoice); 
	g_cpVoice->SetVoice(SpGetCurSelComboBoxToken(GetDlgItem(hWnd,nIDDlgItem))); 
	hr = m_cpRecoCtxt->SetVoice(g_cpVoice,TRUE); 
    if(FAILED(hr)) 
    { 
        m_sError = _T("Error to set voice"); 
        return hr; 
    } 
    return hr; 
} 
 
 
//显示设置话筒的向导 
HRESULT CSpeechRecognition::MicrophoneSetup(HWND hWndParent) 
{ 
    return m_cpRecoEngine->DisplayUI(hWndParent, NULL, SPDUI_MicTraining, NULL, 0); 
} 
 
 
//显示语音训练向导 
HRESULT CSpeechRecognition::VoiceTraining(HWND hWndParent) 
{ 
    return m_cpRecoEngine->DisplayUI(hWndParent, NULL, SPDUI_UserTraining, NULL, 0); 
} 
 
CString CSpeechRecognition::GetErrorString() 
{ 
        return m_sError; 
}