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// Copyright (C) 2021 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
#include <qaudioinput.h>
#include <qaudiodevice.h>
#include <qmediadevices.h>
#include <private/qplatformaudioinput_p.h>
#include <private/qplatformmediaintegration_p.h>
#include <utility>
/*!
\qmltype AudioInput
\instantiates QAudioInput
\brief An audio input to be used for capturing audio in a capture session.
\inqmlmodule QtMultimedia
\ingroup multimedia_qml
\ingroup multimedia_audio_qml
\qml
CaptureSession {
id: playMusic
audioInput: AudioInput {
volume: slider.value
}
recorder: MediaRecorder { ... }
}
Slider {
id: slider
from: 0.
to: 1.
}
\endqml
You can use AudioInput together with a QtMultiMedia::CaptureSession to capture audio from an
audio input device.
\sa Camera, AudioOutput
*/
/*!
\class QAudioInput
\brief Represents an input channel for audio.
\inmodule QtMultimedia
\ingroup multimedia
\ingroup multimedia_audio
This class represents an input channel that can be used together with
QMediaCaptureSession. It enables the selection of the physical input device
to be used, muting the channel, and changing the channel's volume.
*/
QAudioInput::QAudioInput(QObject *parent) : QAudioInput(QMediaDevices::defaultAudioInput(), parent)
{
}
QAudioInput::QAudioInput(const QAudioDevice &device, QObject *parent)
: QObject(parent)
{
auto maybeAudioInput = QPlatformMediaIntegration::instance()->createAudioInput(this);
if (maybeAudioInput) {
d = maybeAudioInput.value();
d->device = device.mode() == QAudioDevice::Input ? device : QMediaDevices::defaultAudioInput();
d->setAudioDevice(d->device);
} else {
d = new QPlatformAudioInput(nullptr);
qWarning() << "Failed to initialize QAudioInput" << maybeAudioInput.error();
}
}
QAudioInput::~QAudioInput()
{
setDisconnectFunction({});
delete d;
}
/*!
\qmlproperty real QtMultimedia::AudioInput::volume
The volume is scaled linearly, ranging from \c 0 (silence) to \c 1 (full volume).
\note values outside this range will be clamped.
By default the volume is \c 1.
UI volume controls should usually be scaled non-linearly. For example,
using a logarithmic scale will produce linear changes in perceived loudness,
which is what a user would normally expect from a volume control.
\sa QtAudio::convertVolume()
*/
/*!
\property QAudioInput::volume
The property returns the volume of the audio input.
*/
float QAudioInput::volume() const
{
return d->volume;
}
void QAudioInput::setVolume(float volume)
{
volume = qBound(0., volume, 1.);
if (d->volume == volume)
return;
d->volume = volume;
d->setVolume(volume);
emit volumeChanged(volume);
}
/*!
\qmlproperty bool QtMultimedia::AudioInput::muted
This property holds whether the audio input is muted.
Defaults to \c{false}.
*/
/*!
\property QAudioInput::muted
\brief The muted state of the current media.
The value will be \c true if the input is muted; otherwise \c false.
*/
bool QAudioInput::isMuted() const
{
return d->muted;
}
void QAudioInput::setMuted(bool muted)
{
if (d->muted == muted)
return;
d->muted = muted;
d->setMuted(muted);
emit mutedChanged(muted);
}
/*!
\qmlproperty AudioDevice QtMultimedia::AudioInput::device
This property describes the audio device connected to this input.
The device property represents the audio device this input is connected to.
This property can be used to select an output device from the
QtMultimedia::MediaDevices::audioInputs() list.
*/
/*!
\property QAudioInput::device
\brief The audio device connected to this input.
The device property represents the audio device connected to this input.
This property can be used to select an input device from the
QMediaDevices::audioInputs() list.
You can select the system default audio input by setting this property to
a default constructed QAudioDevice object.
*/
QAudioDevice QAudioInput::device() const
{
return d->device;
}
void QAudioInput::setDevice(const QAudioDevice &device)
{
auto dev = device;
if (dev.isNull())
dev = QMediaDevices::defaultAudioInput();
if (dev.mode() != QAudioDevice::Input)
return;
if (d->device == dev)
return;
d->device = dev;
d->setAudioDevice(dev);
emit deviceChanged();
}
/*!
\internal
*/
void QAudioInput::setDisconnectFunction(std::function<void()> disconnectFunction)
{
if (d->disconnectFunction) {
auto df = d->disconnectFunction;
d->disconnectFunction = {};
df();
}
d->disconnectFunction = std::move(disconnectFunction);
}
#include "moc_qaudioinput.cpp"
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