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#include "qplatformaudiodecoder_p.h"
#include "qthread.h"

QT_BEGIN_NAMESPACE


/*!
    \class QPlatformAudioDecoder
    \obsolete
    \inmodule QtMultimedia


    \ingroup multimedia_control

    \brief The QPlatformAudioDecoder class provides access 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 QString &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.

    If successful the player control will immediately enter the \l {QAudioDecoder::DecodingState}
    {decoding} state.

    \sa state(), 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 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::audioFormat() const
    Returns the current audio format of the decoded stream.

    Any buffers returned should have this format.

    \sa setAudioFormat(), formatChanged()
*/

/*!
    \fn QPlatformAudioDecoder::setAudioFormat(const QAudioFormat &format)
    Set the desired audio format for decoded samples to \a format.

    If the decoder does not support this format, \l error() will
    be set to \c FormatError.

    If you do not specify a format, the format of the decoded
    audio itself will be used.  Otherwise, some format conversion
    will be applied.

    If you wish to reset the decoded format to that of the original
    audio file, you can specify an invalid \a format.
*/

/*!
    \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