WIN7下使用Qt调用微软TTS进行文本朗读

爱是王道

　　最近研究了下调用微软TTS引擎进行朗读的相关资料，发现其实很简单，特发文与众位博友共享。
　　首先看看微软MSDN官方文档是如何调用TTS的

Microsoft TTS simple sample#include
#include
int main(int argc, char* argv[])
{
ISpVoice * pVoice = NULL;
if (FAILED(::CoInitialize(NULL)))
return FALSE;
HRESULT hr = CoCreateInstance(CLSID_SpVoice, NULL, CLSCTX_ALL, IID_ISpVoice, (void **)&pVoice;);
if( SUCCEEDED( hr ) )
{
hr = pVoice->Speak(L"Hello world", 0, NULL);
pVoice->Release();
pVoice = NULL;
}
::CoUninitialize();
return TRUE;
}　　可以发现其实很简单，就是初始化COM后，创建ISpVoice的实例调用Speak方法即可，如果想更加深入的了解这方面的知识，可以查阅MSDN，http://msdn.microsoft.com/en-us/library/ee125082(v=VS.85).aspx
　　
　　Qt上使用COM非常简单，ActivityQt是Qt上用了和COM打交道，由于是调用COM，我们使用QAxObject即可满足要求。
　　首先设计一个接口


ITTS#include
class ITTS : public QObject
{
Q_OBJECT
public:
ITTS(void);
virtual ~ITTS(void);
virtual bool initSpeech() = 0;
virtual bool speak(QString & txt) = 0;
virtual void pause() = 0;
virtual void resume() = 0;
virtual void stop() = 0;
//rate range : -10 - 10
virtual int rate() = 0;
virtual void setRate(int rate) = 0;
//volume range : 0 - 100
virtual int volume() = 0;
virtual void setVolume(int value)  = 0;
virtual bool isSpeaking() = 0;
signals:
void speakComplete();
};
　　虽然我们是再Win7上使用，由于以后可能还有开发XP上的、Linux上的TTS，所以我们定义一个接口，在我们的调用类中只需要定义一个接口的指针就可以，然后根据实际的环境在初始化中初始化不同环境上的TTS实例，这个我们以后再来演示
　　根据Win7上的TTS，我们来创建Win7TTS类，继承于我们上面定义的ITTS


Win7TSclass Win7TTS :
public ITTS
{
Q_OBJECT
public:
Win7TTS(void);
virtual ~Win7TTS(void);
virtual bool initSpeech();
virtual bool speak(QString & txt);
virtual void pause();
virtual void resume();
virtual void stop();
//rate range : -10 - 10
virtual int rate();
virtual void setRate(int rate);
//volume range : 0 - 100
virtual int volume();
virtual void setVolume(int value) ;
virtual bool isSpeaking();
private slots:
void dealevent(QString name, int arc , void* argv);
private:
QAxObject _voice;
bool _binit;
bool _bReading;
};　　_voice 就是我们用来创建ISpVoice Com对象的成员
　　
　　

Win7TTSWin7TTS::Win7TTS(void) :
_binit(0),
_bReading(0)
{
}
Win7TTS::~Win7TTS(void)
{
}

bool Win7TTS::initSpeech()
{
if(_binit)
return true;
_binit = this->_voice.setControl("96749377-3391-11D2-9EE3-00C04F797396");
if(_binit)
{
connect(&this->_voice,SIGNAL(signal(QString, int, void*)), this, SLOT(dealevent(QString, int, void*)));
}
return _binit;
}
bool Win7TTS::speak(QString & txt)
{
if(!_binit)
return false;
int result = this->_voice.dynamicCall("Speak(QString, SpeechVoiceSpeakFlags)", txt ,1).toInt();
_bReading = true;
return result;
}
void Win7TTS::pause()
{
if(!_binit)
return;
_bReading = false;
this->_voice.dynamicCall("Pause()");
}
void Win7TTS::resume()
{
if(!_binit)
return;
_bReading = true;
this->_voice.dynamicCall("Resume()");
}
void Win7TTS::stop()
{
if(!_binit)
return;
_bReading = false;
int result = this->_voice.dynamicCall("Speak(QString, SpeechVoiceSpeakFlags)", "" ,2).toInt();
}
bool Win7TTS::isSpeaking()
{
return _bReading;
}
//rate range : -10 - 10
int Win7TTS::rate()
{
if(!_binit)
return -99999;
return this->_voice.property("Rate").toInt();
}
void Win7TTS::setRate(int rate)
{
if(!_binit)
return;
this->_voice.dynamicCall("SetRate(int)", rate);
}
//volume range : 0 - 100
int Win7TTS::volume()
{
if(!_binit)
return -99999;
return this->_voice.property("Volume").toInt();
}
void Win7TTS::setVolume(int value)
{
if(!_binit)
return;
this->_voice.dynamicCall("SetVolume(int)", value);
}
void Win7TTS::dealevent(QString name, int arc , void* argv)
{
if(name == "EndStream(int,QVariant)")
{
_bReading = false;
emit speakComplete();
}
}
TTS的框架已经搭好了，现在让我们试试TTS的魅力吧，稍后上传一个TTS的SAMPLE，可以下载下来玩玩！
　　

　　
　　Win7 TTS 示例