#QT SOUND CONTROL HOW TO#

#QT SOUND CONTROL HOW TO#

It shows how to change settings and to capture images. This example demonstrates how to access camera functions via QML. The Camera Example shows how to use the API to capture a still image or video. Nokia TAS has fully featured application development capabilities. If successful the player control will immediately enter the stopped state.Nokia Telecom Application Server (TAS) and a cloud-native programmable core will give operators the business agility they need to ensure sustainable business in a rapidly changing world, and let them gain from the increased demand for high performance connectivity. Stops playback of the current media and discards any buffers. QAudioDecoder::State QAudioDecoderControl:: state() const If successful the player control will immediately enter the decoding state.

Returns the current media source filename, or a null QString if none (or a device) QString QAudioDecoderControl:: sourceFilename() const Returns the current media source QIODevice, or 0 if none (or a file). QIODevice *QAudioDecoderControl:: sourceDevice() const Changing the source will stop any current decoding and discard any buffers. void QAudioDecoderControl:: setSourceFilename(const QString & fileName) Sources are exclusive, so only one can be set. void QAudioDecoderControl:: setSourceDevice( QIODevice * device) If you wish to reset the decoded format to that of the original audio file, you can specify an invalid format. Otherwise, some format conversion will be applied. If you do not specify a format, the format of the decoded audio itself will be used. If the decoder does not support this format, error() will be set to FormatError. Set the desired audio format for decoded samples to format. void QAudioDecoderControl:: setAudioFormat(const QAudioFormat & format)

Returns invalid buffer if there are no decoded buffers available, or on error. QAudioBuffer QAudioDecoderControl:: read()Īttempts to read a buffer from the decoder, without blocking.

Returns position (in milliseconds) of the last buffer read from the decoder or -1 if no buffers have been read. qint64 QAudioDecoderControl:: position() const Returns total duration (in milliseconds) of the audio stream or -1 if not available. qint64 QAudioDecoderControl:: duration() const Returns true if a buffer is available to be read, and false otherwise. bool QAudioDecoderControl:: bufferAvailable() const See also setAudioFormat() and formatChanged(). Returns the current audio format of the decoded stream.Īny buffers returned should have this format. QAudioFormat QAudioDecoderControl:: audioFormat() const QAudioDecoderControl:: ~QAudioDecoderControl()ĭestroys an audio decoder control. Signals that the state of a player control has changed to newState. void QAudioDecoderControl:: stateChanged( QAudioDecoder::State newState) See also sourceFilename() and sourceDevice(). Signals that the current source of the decoder has changed. void QAudioDecoderControl:: sourceChanged() Signals that the current position of the decoder has changed. void QAudioDecoderControl:: positionChanged( qint64 position) See also audioFormat() and setAudioFormat(). Signals that the current audio format of the decoder has changed to format. void QAudioDecoderControl:: formatChanged(const QAudioFormat & format) If decoding fails, error signal is emitted instead. Signals that the decoding has finished successfully. The errorString provides a more detailed explanation. void QAudioDecoderControl:: error( int error, const QString & errorString) Signals that the estimated duration of the decoded data has changed. void QAudioDecoderControl:: durationChanged( qint64 duration) Signals that a new buffer is ready for reading.

void QAudioDecoderControl:: bufferReady() Signals that the bufferAvailable property has changed to available. void QAudioDecoderControl:: bufferAvailableChanged( bool available) Member Function Documentation QAudioDecoderControl:: QAudioDecoderControl( QObject * parent = nullptr)Ĭonstructs a new audio decoder control with the given parent.

Qt sound control