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/****************************************************************************
**
** Copyright (C) 2016 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 3 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL3 included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 3 requirements
** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 2.0 or (at your option) the GNU General
** Public license version 3 or any later version approved by the KDE Free
** Qt Foundation. The licenses are as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
** be met: https://www.gnu.org/licenses/gpl-2.0.html and
** https://www.gnu.org/licenses/gpl-3.0.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "qplatformaudiodecoder_p.h"
#include "qthread.h"
QT_BEGIN_NAMESPACE
/*!
\class QPlatformAudioDecoder
\internal
\inmodule QtMultimedia
\ingroup multimedia_control
\brief The QPlatformAudioDecoder class provides access to audio decoding
functionality.
\preliminary
*/
/*!
Constructs a new audio decoder control with the given \a parent.
*/
QPlatformAudioDecoder::QPlatformAudioDecoder(QAudioDecoder *parent)
: QObject(parent),
q(parent)
{
}
/*!
\fn QPlatformAudioDecoder::source() const
Returns the current media source filename, or a null QString if none (or a device)
*/
/*!
\fn QPlatformAudioDecoder::setSource(const QUrl &fileName)
Sets the current source to \a fileName. Changing the source will
stop any current decoding and discard any buffers.
Sources are exclusive, so only one can be set.
*/
/*!
\fn QPlatformAudioDecoder::sourceDevice() const
Returns the current media source QIODevice, or 0 if none (or a file).
*/
/*!
\fn QPlatformAudioDecoder::setSourceDevice(QIODevice *device)
Sets the current source to \a device. Changing the source will
stop any current decoding and discard any buffers.
Sources are exclusive, so only one can be set.
*/
/*!
\fn QPlatformAudioDecoder::start()
Starts decoding the current media.
\sa read()
*/
/*!
\fn QPlatformAudioDecoder::stop()
Stops playback of the current media and discards any buffers.
If successful the player control will immediately enter the \l {QAudioDecoder::StoppedState}
{stopped} state.
*/
/*!
\fn QPlatformAudioDecoder::error(int error, const QString &errorString)
Signals that an \a error has occurred. The \a errorString provides a more detailed explanation.
*/
void QPlatformAudioDecoder::error(int error, const QString &errorString)
{
if (error == m_error && errorString == m_errorString)
return;
m_error = QAudioDecoder::Error(error);
m_errorString = errorString;
setIsDecoding(false);
emit q->error(m_error);
}
/*!
\fn QPlatformAudioDecoder::bufferAvailableChanged(bool available)
Signals that the bufferAvailable property has changed to \a available.
*/
void QPlatformAudioDecoder::bufferAvailableChanged(bool available)
{
if (QThread::currentThread() != q->thread())
QMetaObject::invokeMethod(q, "bufferAvailableChanged", Qt::QueuedConnection, Q_ARG(bool, available));
else
emit q->bufferAvailableChanged(available);
}
/*!
\fn QPlatformAudioDecoder::bufferReady()
Signals that a new buffer is ready for reading.
*/
void QPlatformAudioDecoder::bufferReady()
{
if (QThread::currentThread() != q->thread())
QMetaObject::invokeMethod(q, "bufferReady", Qt::QueuedConnection);
else
emit q->bufferReady();
}
/*!
\fn QPlatformAudioDecoder::sourceChanged()
Signals that the current source of the decoder has changed.
\sa source(), sourceDevice()
*/
void QPlatformAudioDecoder::sourceChanged()
{
emit q->sourceChanged();
}
/*!
\fn QPlatformAudioDecoder::formatChanged(const QAudioFormat &format)
Signals that the current audio format of the decoder has changed to \a format.
\sa audioFormat(), setAudioFormat()
*/
void QPlatformAudioDecoder::formatChanged(const QAudioFormat &format)
{
emit q->formatChanged(format);
}
/*!
\fn void QPlatformAudioDecoder::finished()
Signals that the decoding has finished successfully.
If decoding fails, error signal is emitted instead.
\sa start(), stop(), error()
*/
void QPlatformAudioDecoder::finished()
{
setIsDecoding(false);
emit q->finished();
}
/*!
\fn void QPlatformAudioDecoder::positionChanged(qint64 position)
Signals that the current \a position of the decoder has changed.
\sa durationChanged()
*/
void QPlatformAudioDecoder::positionChanged(qint64 position)
{
q->positionChanged(position);
}
/*!
\fn void QPlatformAudioDecoder::durationChanged(qint64 duration)
Signals that the estimated \a duration of the decoded data has changed.
\sa positionChanged()
*/
void QPlatformAudioDecoder::durationChanged(qint64 duration)
{
q->durationChanged(duration);
}
/*!
\fn QPlatformAudioDecoder::read()
Attempts to read a buffer from the decoder, without blocking. Returns invalid buffer if there are
no decoded buffers available, or on error.
*/
/*!
\fn QPlatformAudioDecoder::position() const
Returns position (in milliseconds) of the last buffer read from
the decoder or -1 if no buffers have been read.
*/
/*!
\fn QPlatformAudioDecoder::duration() const
Returns total duration (in milliseconds) of the audio stream
or -1 if not available.
*/
QT_END_NAMESPACE
|
