The TextToSpeech type provides access to text-to-speech engines. 更多...
| import 语句： | import QtTextToSpeech |
(从 6.6 起)
(从 6.6 起)
(从 6.6 起)
(从 6.6 起)
(从 6.6 起)
使用 say () to start reading text to the default audio device, and stop (), pause ()，和 resume () to control the reading of the text.
TextToSpeech {
id: tts
volume: volumeSlider.value
pitch: pitchSlider.value
rate: rateSlider.value
...
RowLayout {
Button {
text: qsTr("Speak")
enabled: [TextToSpeech.Paused, TextToSpeech.Ready].includes(tts.state)
onClicked: {
tts.say(input.text)
}
}
Button {
text: qsTr("Pause")
enabled: tts.state == TextToSpeech.Speaking
onClicked: tts.pause()
visible: tts.engineCapabilities & TextToSpeech.Capabilities.PauseResume
}
Button {
text: qsTr("Resume")
enabled: tts.state == TextToSpeech.Paused
onClicked: tts.resume()
visible: tts.engineCapabilities & TextToSpeech.Capabilities.PauseResume
}
...
To synthesize text into PCM data for further processing, use synthesize().
To set a voice, use the VoiceSelector attached property like this:
TextToSpeech { VoiceSelector.locale: Qt.locale("en_UK") VoiceSelector.gender: Voice.Male }
The first voice that matches all specified criteria will be used. If no voice matches all criteria, then the voice will not change.
Alternatively, use findVoices () to get a list of matching voices, or use availableVoices () to get the list of voices that support the current locale. Change the locale property, using one of the availableLocales () that is a good match for the language that the input text is in, and for the accent of the desired voice output. This will change the list of available voices on most platforms. Then use one of the available voices in the voice 特性。
Not every engine supports all features. Use the engineCapabilities() function to test which features are available, and adjust the usage of the type accordingly.
注意： Which locales and voices the engine supports depends usually on the Operating System configuration. E.g. on macOS, end users can install voices through the 可访问性 panel in System Preferences .
|
engine : string |
The engine used to synthesize text to speech.
Changing the engine stops any ongoing speech.
On most platforms, changing the engine will update the list of available locales and available voices .
|
engineCapabilities
:
enumeration
|
This property holds the capabilities implemented by the current engine.
该特性在 Qt 6.6 引入。
另请参阅 engine and QTextToSpeech::Capability .
|
engineParameters : map |
This property holds engine-specific parameters.
另请参阅 engine .
|
locale : locale |
This property holds the current locale in use.
By default, the system locale is used.
另请参阅 voice .
|
pitch : double |
This property hold the voice pitch, ranging from -1.0 to 1.0.
The default of 0.0 is the normal speech pitch.
|
rate : double |
This property holds the current voice rate, ranging from -1.0 to 1.0.
The default of 0.0 is the normal speech flow.
|
state : enumeration |
This property holds the current state of the speech synthesizer.
onStateChanged: updateStateLabel(state)
function updateStateLabel(state)
{
switch (state) {
case TextToSpeech.Ready:
statusLabel.text = qsTr("Ready")
break
case TextToSpeech.Speaking:
statusLabel.text = qsTr("Speaking")
break
case TextToSpeech.Paused:
statusLabel.text = qsTr("Paused...")
break
case TextToSpeech.Error:
statusLabel.text = qsTr("Error!")
break
}
}
另请参阅 QTextToSpeech::State , say (), stop ()，和 pause ().
|
voice : Voice |
This property holds the voice that will be used for the speech.
The voice needs to be one of the voices available for the engine.
On some platforms, setting the voice changes other voice attributes such as locale , pitch , and so on. These changes trigger the emission of signals.
|
volume : double |
This property holds the current volume, ranging from 0.0 to 1.0.
The default value is the platform's default volume.
|
|
This signal gets emitted just before the engine starts to synthesize the speech audio for id . Applications can use this signal to make last-minute changes to voice attributes, or to track the process of text enqueued via enqueue ().
注意：
相应处理程序是
onAboutToSynthesize
.
This signal was introduced in Qt 6.6.
|
void errorOccurred ( enumeration reason , string errorString ) |
This signal is emitted after an error occurred and the
state
has been set to
TextToSpeech.Error
。
reason
parameter specifies the type of error, and the
errorString
provides a human-readable error description.
注意：
相应处理程序是
onErrorOccurred
.
另请参阅 state , errorReason ()，和 errorString ().
|
|
此信号发射当 word , which is the slice of text indicated by start and length in the utterance id , gets played to the audio device.
注意： This signal requires that the engine has the WordByWordProgress 能力。
The following code highlights the word that is spoken in a
TextArea
input
:
onSayingWord: (word, id, start, length)=> {
input.select(start, start + length)
}
注意：
相应处理程序是
onSayingWord
.
This signal was introduced in Qt 6.6.
另请参阅 QTextToSpeech::Capability and say ().
|
list < string > availableEngines () |
Holds the list of supported text-to-speech engine plug-ins.
|
list < Voice > availableLocales () |
Holds the list of locales that are supported by the active engine .
|
list < Voice > availableVoices () |
Holds the list of voices available for the current locale .
|
|
添加 utterance to the queue of text to be spoken, and starts speaking.
If the engine's
state
is currently
Ready
,
utterance
will be spoken immediately. Otherwise, the engine will start to speak
utterance
once it has finished speaking the current text.
Each time the engine proceeds to the next text entry in the queue, the aboutToSynthesize () signal gets emitted. This allows applications to keep track of the progress, and to make last-minute changes to voice attributes.
调用 stop () clears the queue.
This method was introduced in Qt 6.6.
另请参阅 say (), stop ()，和 aboutToSynthesize ().
|
enumeration errorReason () |
Returns the reason why the engine has reported an error.
另请参阅 QTextToSpeech::ErrorReason .
|
string errorString () |
Returns the current engine error message.
|
|
Returns the list of voices that match all the specified criteria .
criteria is a map from voice property name to property value, supporting combinations of search criteria such as:
let daniel = tts.findVoices({ "name": "Daniel" }) let maleEnglish = tts.findVoices({ "gender": Voice.Male, "language": Qt.locale('en') })
This method was introduced in Qt 6.6.
另请参阅 VoiceSelector .
|
pause ( BoundaryHint boundaryHint ) |
Pauses the current speech at boundaryHint .
是否 boundaryHint is respected depends on the engine .
另请参阅 resume (), QTextToSpeech::BoundaryHint ，和 PauseResume .
|
resume () |
Resume speaking after pause () 被调用。
另请参阅 pause ().
|
say ( string text ) |
Starts synthesizing the text .
This function starts sythesizing the speech asynchronously, and reads the text to the default audio output device.
RowLayout {
Button {
text: qsTr("Speak")
enabled: [TextToSpeech.Paused, TextToSpeech.Ready].includes(tts.state)
onClicked: {
tts.say(input.text)
}
}
注意： All in-progress readings are stopped before beginning to read the recently synthesized text.
The current state is available using the state property, and is set to QTextToSpeech::Speaking once the reading starts. When the reading is done, state will be set to QTextToSpeech::Ready .
另请参阅 stop (), pause ()，和 resume ().
|
stop ( BoundaryHint boundaryHint ) |
Stops the current reading at boundaryHint , and clears the queue of pending texts.
The reading cannot be resumed. Whether the boundaryHint is respected depends on the engine.
另请参阅 say (), enqueue (), pause ()，和 QTextToSpeech::BoundaryHint .