Qt 播放语音 QTextToSpeech

前言:

看 qt 的 demo 看到一个播放语音的玩了玩还可以
就是太"傻瓜"的操作了我以为能学到一些东西

speech->say("你好");

这样就能说你好

我这就不弄动图了因为听不到声音

基本的功能

设置声音

设置速率

设置高低音

然后有播放引擎是基于你系统的TTS 引擎
语言的话可以选择中文英文等去系统里面可以设置

QTextToSpeech （Qt 5.8+ 才有这个模块）

QTextToSpeech类提供了对文本到语音引擎的方便访问
使用say()开始合成文本。可以使用setLocale()指定语言。要在可用的声音之间进行选择，请使用setVoice()。语言和声音依赖于每个平台上可用的合成器。在Linux上，语音分配器是默认使用的。

在 pro 加入 QT+= qtexttospeech

#include < QTextToSpeech >

这个代码我看了一下感觉没啥好看的
这个类给封装的很简单
写一些接口的使用吧

获取可用的引擎 QTextToSpeech::availableEngines()

foreach (QString engine, QTextToSpeech::availableEngines())qDebug()<<engine;

类的实例化

如果不指定引擎可以选择默认的

   QTextToSpeech * m_speech = new QTextToSpeech();

可以用我们上面选择的可用的引擎的名字传入

 QTextToSpeech * m_speech = new QTextToSpeech(engineName);

setRate(double)

可以设置速率高低音音量
此属性保存当前语音速率，范围从-1.0到1.0。默认值0.0是正常的语音流。

setPitch(double)

此属性保存语音音高，范围从-1.0到1.0。默认的0.0是正常的语音音高。

setVolume(double)

此属性保存当前音量，范围从0.0到1.0。默认值是平台的默认音量。

void setVoice(const QVoice &voice);

设置声音是谁的我看window下有个男声音和女声音

设置声音使用。
注意:在某些平台上，设置语音会更改其他语音属性，如地区、音高等。这些变化触发了信号的发射。

void setLocale(const QLocale &locale);

设置语言的语种有中文英文啥的

将语言环境设置为给定的语言环境。默认是系统语言环境。
注意:属性区域设置的Setter函数。

播放语音 void say(const QString &text);

传入字符串
比如 say(“hello world”) 语音里就说 hello world

它是异步的

开始合成文章。这个函数将开始异步读取文本。使用state属性可以使用当前状态。一旦合成完成，就会发出stateChanged()信号，该信号处于就绪状态。

一些状态（就绪 speaking 暂停中等）

官方demo 用的一些接口我上面都说了
其他的都是一些界面和逻辑的代码
看一下也可以

下面把 Qt demo 的整个代码贴一下

.h

#include <QtWidgets/qmainwindow.h>#include "ui_mainwindow.h"#include <QTextToSpeech>class MainWindow : public QMainWindow
{Q_OBJECT
public:MainWindow(QWidget *parent = 0);public slots:void speak();void stop();void setRate(int);void setPitch(int);void setVolume(int volume);void stateChanged(QTextToSpeech::State state);void engineSelected(int index);void languageSelected(int language);void voiceSelected(int index);void localeChanged(const QLocale &locale);private:Ui::MainWindow ui;QTextToSpeech *m_speech;QVector<QVoice> m_voices;
};

.cpp


#include "mainwindow.h"
#include <QLoggingCategory>
#include <QDebug>
MainWindow::MainWindow(QWidget *parent): QMainWindow(parent),m_speech(0)
{ui.setupUi(this);QLoggingCategory::setFilterRules(QStringLiteral("qt.speech.tts=true \n qt.speech.tts.*=true"));// Populate engine selection listui.engine->addItem("Default", QString("default"));foreach (QString engine, QTextToSpeech::availableEngines())qDebug()<<"engine:"<<engine;ui.engine->setCurrentIndex(0);engineSelected(0);connect(ui.speakButton, &QPushButton::clicked, this, &MainWindow::speak);connect(ui.pitch, &QSlider::valueChanged, this, &MainWindow::setPitch);connect(ui.rate, &QSlider::valueChanged, this, &MainWindow::setRate);connect(ui.volume, &QSlider::valueChanged, this, &MainWindow::setVolume);connect(ui.engine, static_cast<void (QComboBox::*)(int)>(&QComboBox::currentIndexChanged), this, &MainWindow::engineSelected);
}void MainWindow::speak()
{m_speech->say(ui.plainTextEdit->toPlainText());
}
void MainWindow::stop()
{m_speech->stop();
}void MainWindow::setRate(int rate)
{m_speech->setRate(rate / 10.0);
}void MainWindow::setPitch(int pitch)
{m_speech->setPitch(pitch / 10.0);
}void MainWindow::setVolume(int volume)
{m_speech->setVolume(volume / 100.0);
}void MainWindow::stateChanged(QTextToSpeech::State state)
{if (state == QTextToSpeech::Speaking) {ui.statusbar->showMessage("Speech started...");} else if (state == QTextToSpeech::Ready)ui.statusbar->showMessage("Speech stopped...", 2000);else if (state == QTextToSpeech::Paused)ui.statusbar->showMessage("Speech paused...");elseui.statusbar->showMessage("Speech error!");ui.pauseButton->setEnabled(state == QTextToSpeech::Speaking);ui.resumeButton->setEnabled(state == QTextToSpeech::Paused);ui.stopButton->setEnabled(state == QTextToSpeech::Speaking || state == QTextToSpeech::Paused);
}void MainWindow::engineSelected(int index)
{QString engineName = ui.engine->itemData(index).toString();delete m_speech;if (engineName == "default")m_speech = new QTextToSpeech(this);elsem_speech = new QTextToSpeech(engineName, this);disconnect(ui.language, static_cast<void (QComboBox::*)(int)>(&QComboBox::currentIndexChanged), this, &MainWindow::languageSelected);ui.language->clear();// Populate the languages combobox before connecting its signal.QVector<QLocale> locales = m_speech->availableLocales();QLocale current = m_speech->locale();foreach (const QLocale &locale, locales) {QString name(QString("%1 (%2)").arg(QLocale::languageToString(locale.language())).arg(QLocale::countryToString(locale.country())));QVariant localeVariant(locale);ui.language->addItem(name, localeVariant);if (locale.name() == current.name())current = locale;}setRate(ui.rate->value());setPitch(ui.pitch->value());setVolume(ui.volume->value());connect(ui.stopButton, &QPushButton::clicked, m_speech, &QTextToSpeech::stop);connect(ui.pauseButton, &QPushButton::clicked, m_speech, &QTextToSpeech::pause);connect(ui.resumeButton, &QPushButton::clicked, m_speech, &QTextToSpeech::resume);connect(m_speech, &QTextToSpeech::stateChanged, this, &MainWindow::stateChanged);connect(m_speech, &QTextToSpeech::localeChanged, this, &MainWindow::localeChanged);connect(ui.language, static_cast<void (QComboBox::*)(int)>(&QComboBox::currentIndexChanged), this, &MainWindow::languageSelected);localeChanged(current);
}void MainWindow::languageSelected(int language)
{QLocale locale = ui.language->itemData(language).toLocale();m_speech->setLocale(locale);
}void MainWindow::voiceSelected(int index)
{m_speech->setVoice(m_voices.at(index));
}void MainWindow::localeChanged(const QLocale &locale)
{QVariant localeVariant(locale);ui.language->setCurrentIndex(ui.language->findData(localeVariant));disconnect(ui.voice, static_cast<void (QComboBox::*)(int)>(&QComboBox::currentIndexChanged), this, &MainWindow::voiceSelected);ui.voice->clear();m_voices = m_speech->availableVoices();QVoice currentVoice = m_speech->voice();foreach (const QVoice &voice, m_voices) {ui.voice->addItem(QString("%1 - %2 - %3").arg(voice.name()).arg(QVoice::genderName(voice.gender())).arg(QVoice::ageName(voice.age())));if (voice.name() == currentVoice.name())ui.voice->setCurrentIndex(ui.voice->count() - 1);}connect(ui.voice, static_cast<void (QComboBox::*)(int)>(&QComboBox::currentIndexChanged), this, &MainWindow::voiceSelected);
}