/****************************************************************************
**
** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** GNU Lesser General Public License Usage
** This file may be used under the terms of the GNU Lesser General Public
** License version 2.1 as published by the Free Software Foundation and
** appearing in the file LICENSE.LGPL included in the packaging of this
** file. Please review the following information to ensure the GNU Lesser
** General Public License version 2.1 requirements will be met:
** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Nokia gives you certain additional
** rights. These rights are described in the Nokia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU General
** Public License version 3.0 as published by the Free Software Foundation
** and appearing in the file LICENSE.GPL included in the packaging of this
** file. Please review the following information to ensure the GNU General
** Public License version 3.0 requirements will be met:
** http://www.gnu.org/copyleft/gpl.html.
**
** Other Usage
** Alternatively, this file may be used in accordance with the terms and
** conditions contained in a signed written agreement between you and Nokia.
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/

#include "qgstreameraudioinputendpointselector.h"

#include <QtCore/QDir>
#include <QtCore/QDebug>

#include <gst/gst.h>

#ifdef HAVE_ALSA
#include <alsa/asoundlib.h>
#endif

QGstreamerAudioInputEndpointSelector::QGstreamerAudioInputEndpointSelector(QObject *parent)
    :QAudioEndpointSelector(parent)
{
    update();
}

QGstreamerAudioInputEndpointSelector::~QGstreamerAudioInputEndpointSelector()
{
}

QList<QString> QGstreamerAudioInputEndpointSelector::availableEndpoints() const
{
    return m_names;
}

QString QGstreamerAudioInputEndpointSelector::endpointDescription(const QString& name) const
{
    QString desc;

    for (int i = 0; i < m_names.size(); i++) {
        if (m_names.at(i).compare(name) == 0) {
            desc = m_descriptions.at(i);
            break;
        }
    }
    return desc;
}

QString QGstreamerAudioInputEndpointSelector::defaultEndpoint() const
{
    if (m_names.size() > 0)
        return m_names.at(0);

    return QString();
}

QString QGstreamerAudioInputEndpointSelector::activeEndpoint() const
{
    return m_audioInput;
}

void QGstreamerAudioInputEndpointSelector::setActiveEndpoint(const QString& name)
{
    if (m_audioInput.compare(name) != 0) {
        m_audioInput = name;
        emit activeEndpointChanged(name);
    }
}

void QGstreamerAudioInputEndpointSelector::update()
{
    m_names.clear();
    m_descriptions.clear();
    updateAlsaDevices();
    updateOssDevices();
    updatePulseDevices();
    if (m_names.size() > 0)
        m_audioInput = m_names.at(0);
}

void QGstreamerAudioInputEndpointSelector::updateAlsaDevices()
{
#ifdef HAVE_ALSA
    void **hints, **n;
    if (snd_device_name_hint(-1, "pcm", &hints) < 0) {
        qWarning()<<"no alsa devices available";
        return;
    }
    n = hints;

    while (*n != NULL) {
        char *name = snd_device_name_get_hint(*n, "NAME");
        char *descr = snd_device_name_get_hint(*n, "DESC");
        char *io = snd_device_name_get_hint(*n, "IOID");

        if ((name != NULL) && (descr != NULL)) {
            if ( io == NULL || qstrcmp(io,"Input") == 0 ) {
                m_names.append(QLatin1String("alsa:")+QString::fromUtf8(name));
                m_descriptions.append(QString::fromUtf8(descr));
            }
        }

        if (name != NULL)
            free(name);
        if (descr != NULL)
            free(descr);
        if (io != NULL)
            free(io);
        n++;
    }
    snd_device_name_free_hint(hints);
#endif
}

void QGstreamerAudioInputEndpointSelector::updateOssDevices()
{
    QDir devDir("/dev");
    devDir.setFilter(QDir::System);
    QFileInfoList entries = devDir.entryInfoList(QStringList() << "dsp*");
    foreach(const QFileInfo& entryInfo, entries) {
        m_names.append(QLatin1String("oss:")+entryInfo.filePath());
        m_descriptions.append(QString("OSS device %1").arg(entryInfo.fileName()));
    }
}

void QGstreamerAudioInputEndpointSelector::updatePulseDevices()
{
    GstElementFactory *factory = gst_element_factory_find("pulsesrc");
    if (factory) {
        m_names.append("pulseaudio:");
        m_descriptions.append("PulseAudio device.");
        gst_object_unref(GST_OBJECT(factory));
    }
}