【Qt编程】调用讲述人

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2024-07-14 23:05:50 212人阅读

我们知道，win7系统自带有讲述人，即可以机器读出当前内容，具体可以将电脑锁定，然后点击左下角的按钮即可。之前在用Matlab写扫雷游戏的时候，也曾经调用过讲述人来进行游戏的语音提示。具体的Matlab脚本文件如下：

 sp=actxserver('SAPI.SpVoice');sp.Speak('你好，欢迎来到西安电子科技大学！Hello,Welcome to XD University!')

Qt调用讲述人，需要使用专门的类，具体可以参考http://lynxline.com/qtspeech-say-hello-world 一文，文中大致介绍了该类的使用方法。下面我就通过使用该类来实现讲述人的调用。

首先建立一个dialog类型的gui项目，将上面所说的类QtSpeech类的头文件speech.h和源文件speech.cpp添加到工程中，这样项目中就有5个文件：dialog.h、speech.h、main.cpp、dialog.cpp、speech.cpp。当然还有界面文件dialog.ui。在界面文件中添加QTextEdit控件用于输入你要读取的文字，然后在其槽函数中添加QtSpeech的发音功能，添加QPushButton控件来控制发音。具体的各个文件源代码如下：

1、dialog.h

#ifndef DIALOG_H
#define DIALOG_H
#include <QDialog>
#include"speech.h"
namespace Ui {
class Dialog;
}
class Dialog : public QDialog
{
    Q_OBJECT
    
public:
    explicit Dialog(QWidget *parent = 0);
    ~Dialog();
    
private slots:
    void on_pushButton_clicked();
private:
    Ui::Dialog *ui;
};
#endif // DIALOG_H

2、speech.h

#ifndef SPEECH_H
#define SPEECH_H
#include <QObject>
class QtSpeech : public QObject {
    Q_OBJECT
public:
    // 处理异常情况
    struct Error { QString msg; Error(QString s):msg(s) {} };
    struct InitError : Error { InitError(QString s):Error(s) {} };
    struct LogicError : Error { LogicError(QString s):Error(s) {} };
    struct CloseError : Error { CloseError(QString s):Error(s) {} };
    //定义数据类型
    struct VoiceName { QString id; QString name; };
    typedef QList<VoiceName> VoiceNames;
    //定义构造函数
    QtSpeech(QObject * parent);
    QtSpeech(VoiceName n = VoiceName(), QObject * parent =0L);
    virtual ~QtSpeech();
    const VoiceName & name() const; //要读的内容
    static VoiceNames voices();     //要读的内容
    void say(QString) const;                                    //同步发音
    void tell(QString) const;                                   //异步发音
    void tell(QString, QObject * obj, const char * slot) const; //发音结束时，有停顿
    /*******************/
    void pause(void) const;//暂停
    void resume(void) const;//从暂停中恢复
    void stop(void) const;//停止发音
    /******************/
signals:
    void finished();
protected:
    virtual void timerEvent(QTimerEvent *);
private:
    class Private;
    Private * d;
};
//}
#endif // SPEECH_H

3、main.cpp

#include <QApplication>
#include"dialog.h"
int main(int argc, char *argv[]){
    QApplication app(argc, argv);
    Dialog dlg;
    dlg.show();
    return app.exec();
}

4、dialog.cpp

#include "dialog.h"
#include "ui_dialog.h"
Dialog::Dialog(QWidget *parent) :
    QDialog(parent),
    ui(new Ui::Dialog)
{
    ui->setupUi(this);
}
Dialog::~Dialog()
{
    delete ui;
}
void Dialog::on_pushButton_clicked()
{
    QtSpeech *speaker = new QtSpeech(this);
    speaker->tell(ui->textEdit->toPlainText(),speaker,SLOT(onSpeechFinished()));
   // speaker.stop();
}

5、speech.cpp

#include "speech.h"
#include <QString>
#include <QPointer>
#include <QList>
#include <QTimerEvent>
#undef UNICODE
#include <sapi.h>
#include <sphelper.h>
#include <comdef.h>
#define UNICODE
#include <windows.h>
#include <windowsx.h>
#include <commctrl.h>
// some defines for throwing exceptions
#define Where QString("%1:%2:").arg(__FILE__).arg(__LINE__)
#define SysCall(x,e) {    HRESULT hr = x;    if (FAILED(hr)) {        QString msg = #e;        msg += ":"+QString(__FILE__);        msg += ":"+QString::number(__LINE__)+":"+#x+":";        msg += _com_error(hr).ErrorMessage();        throw e(msg);    }}
// internal data
class QtSpeech::Private {
public:
    Private()
        :onFinishSlot(0L),waitingFinish(false) {}
    VoiceName name;
    static const QString VoiceId;
    typedef QPointer<QtSpeech> Ptr;
    static QList<Ptr> ptrs;
    CComPtr<ISpVoice> voice;
    const char * onFinishSlot;
    QPointer<QObject> onFinishObj;
    bool waitingFinish;
    class WCHAR_Holder {
    public:
        WCHAR * w;
        WCHAR_Holder(QString s)
            :w(0) {
            w = new WCHAR[s.length()+1];
            s.toWCharArray(w);
            w[s.length()] =0;
        }
        ~WCHAR_Holder() { delete[] w; }
    };
};
const QString QtSpeech::Private::VoiceId = QString("win:%1");
QList<QtSpeech::Private::Ptr> QtSpeech::Private::ptrs = QList<QtSpeech::Private::Ptr>();
//类的定义
QtSpeech::QtSpeech(QObject * parent)
    :QObject(parent), d(new Private)
{
    CoInitialize(NULL);
    SysCall( d->voice.CoCreateInstance( CLSID_SpVoice ), InitError);
    VoiceName n;
    WCHAR * w_id = 0L;
    WCHAR * w_name = 0L;
    CComPtr<ISpObjectToken> voice;
    SysCall( d->voice->GetVoice(&voice), InitError);
    SysCall( SpGetDescription(voice, &w_name), InitError);
    SysCall( voice->GetId(&w_id), InitError);
    n.name = QString::fromWCharArray(w_name);
    n.id = QString::fromWCharArray(w_id);
    voice.Release();
    if (n.id.isEmpty())
        throw InitError(Where+"No default voice in system");
    d->name = n;
    d->ptrs << this;
}
QtSpeech::QtSpeech(VoiceName n, QObject * parent)
    :QObject(parent), d(new Private)
{
    ULONG count = 0;
    CComPtr<IEnumSpObjectTokens> voices;
    CoInitialize(NULL);
    SysCall( d->voice.CoCreateInstance( CLSID_SpVoice ), InitError);
    if (n.id.isEmpty()) {
        WCHAR * w_id = 0L;
        WCHAR * w_name = 0L;
        CComPtr<ISpObjectToken> voice;
        SysCall( d->voice->GetVoice(&voice), InitError);
        SysCall( SpGetDescription(voice, &w_name), InitError);
        SysCall( voice->GetId(&w_id), InitError);
        n.name = QString::fromWCharArray(w_name);
        n.id = QString::fromWCharArray(w_id);
        voice.Release();
    }
    else {
        SysCall( SpEnumTokens(SPCAT_VOICES, NULL, NULL, &voices), InitError);
        SysCall( voices->GetCount(&count), InitError);
        for (int i =0; i< count; ++i) {
            WCHAR * w_id = 0L;
            CComPtr<ISpObjectToken> voice;
            SysCall( voices->Next( 1, &voice, NULL ), InitError);
            SysCall( voice->GetId(&w_id), InitError);
            QString id = QString::fromWCharArray(w_id);
            if (id == n.id) d->voice->SetVoice(voice);
            voice.Release();
        }
    }
    if (n.id.isEmpty())
        throw InitError(Where+"No default voice in system");
    d->name = n;
    d->ptrs << this;
}
QtSpeech::~QtSpeech()
{
    d->ptrs.removeAll(this);
    delete d;
}
const QtSpeech::VoiceName & QtSpeech::name() const {
    return d->name;
}
QtSpeech::VoiceNames QtSpeech::voices()
{
    VoiceNames vs;
    ULONG count = 0;
    CComPtr<IEnumSpObjectTokens> voices;
    CoInitialize(NULL);
    SysCall( SpEnumTokens(SPCAT_VOICES, NULL, NULL, &voices), LogicError);
    SysCall( voices->GetCount(&count), LogicError);
    for(int i=0; i< count; ++i) {
        WCHAR * w_id = 0L;
        WCHAR * w_name = 0L;
        CComPtr<ISpObjectToken> voice;
        SysCall( voices->Next( 1, &voice, NULL ), LogicError);
        SysCall( SpGetDescription(voice, &w_name), LogicError);
        SysCall( voice->GetId(&w_id), LogicError);
        QString id = QString::fromWCharArray(w_id);
        QString name = QString::fromWCharArray(w_name);
        VoiceName n = { id, name };
        vs << n;
        voice.Release();
    }
    return vs;
}
void QtSpeech::tell(QString text) const {
    tell(text, 0L,0L);
}
void QtSpeech::tell(QString text, QObject * obj, const char * slot) const
{
    if (d->waitingFinish)
        throw LogicError(Where+"Already waiting to finish speech");
    d->onFinishObj = obj;
    d->onFinishSlot = slot;
    if (obj && slot)
        connect(const_cast<QtSpeech *>(this), SIGNAL(finished()), obj, slot);
    d->waitingFinish = true;
    const_cast<QtSpeech *>(this)->startTimer(100);
    Private::WCHAR_Holder w_text(text);
    SysCall( d->voice->Speak( w_text.w, SPF_ASYNC | SPF_IS_NOT_XML, 0), LogicError);
}
void QtSpeech::say(QString text) const
{
    Private::WCHAR_Holder w_text(text);
    SysCall( d->voice->Speak( w_text.w, SPF_IS_NOT_XML, 0), LogicError);
}
void QtSpeech::timerEvent(QTimerEvent * te)
{
    QObject::timerEvent(te);
    if (d->waitingFinish) {
        SPVOICESTATUS es;
        d->voice->GetStatus( &es, NULL );
        if (es.dwRunningState == SPRS_DONE) {
            d->waitingFinish = false;
            killTimer(te->timerId());
            finished();
        }
    }
}
/************************/
void QtSpeech::pause(void) const{//暂停
    SysCall( d->voice->Pause(), LogicError);
}
void QtSpeech::resume() const{//恢复
    SysCall(d->voice->Resume(), LogicError);
}
void QtSpeech::stop() const{//停止
    SysCall(d->voice->Speak(NULL, SPF_PURGEBEFORESPEAK, 0), LogicError)
}
/***************************/
//}

程序结果如下：

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