/*  This file is part of the KDE project.

    Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).

    This library is free software: you can redistribute it and/or modify

    it under the terms of the GNU Lesser General Public License as published by

    the Free Software Foundation, either version 2.1 or 3 of the License.

    This library is distributed in the hope that it will be useful,

    but WITHOUT ANY WARRANTY; without even the implied warranty of

    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

    GNU Lesser General Public License for more details.

    You should have received a copy of the GNU Lesser General Public License

    along with this library.  If not, see <http://www.gnu.org/licenses/>.

*/

#include "effect.h"

#include "common.h"

#include "audiooutput.h"

#include "backend.h"

#include "medianode.h"

#include "effectmanager.h"

#include "gsthelper.h"

#include <gst/gst.h>

QT_BEGIN_NAMESPACE

namespace Phonon

{

namespace Gstreamer

{

Effect::Effect(Backend *backend, QObject *parent, NodeDescription description)

        : QObject(parent),

        MediaNode(backend, description)

        , m_effectBin(0)

        , m_effectElement(0)

{

}

void Effect::init()

{

    m_effectBin = createEffectBin();

    if (m_effectBin) {

        setupEffectParams();

        gst_object_ref (GST_OBJECT (m_effectBin)); // Take ownership

        gst_object_sink (GST_OBJECT (m_effectBin));

        m_isValid = true;

    }

}

Effect::~Effect()

{

    if (m_effectBin) {

        gst_element_set_state (m_effectBin, GST_STATE_NULL);

        gst_object_unref (m_effectBin);

    }

}

void Effect::setupEffectParams()

{

    Q_ASSERT(m_effectElement);

    //query and store parameters

    if (m_effectElement) {

        GParamSpec **property_specs;

        guint propertyCount, i;

        property_specs = g_object_class_list_properties(G_OBJECT_GET_CLASS (m_effectElement), &propertyCount);

        for (i = 0; i < propertyCount; i++) {

            GParamSpec *param = property_specs[i];

            if (param->flags & G_PARAM_WRITABLE) {

                QString propertyName = g_param_spec_get_name (param);

                // These properties should not be exposed to the front-end

                if (propertyName == "qos" || propertyName == "name" || propertyName == "async-handling")

                    continue;

                switch(param->value_type) {

                    case G_TYPE_UINT:

                        m_parameterList.append(Phonon::EffectParameter(i, propertyName,

                            0,   //hints

                            G_PARAM_SPEC_UINT(param)->default_value,

                            G_PARAM_SPEC_UINT(param)->minimum,

                            G_PARAM_SPEC_UINT(param)->maximum));

                        break;

                    case G_TYPE_STRING:

                        m_parameterList.append(Phonon::EffectParameter(i, propertyName,

                            0,   //hints

                            G_PARAM_SPEC_STRING(param)->default_value,

                            0,

                            0));

                        break;

                    case G_TYPE_INT:

                        m_parameterList.append(Phonon::EffectParameter(i, propertyName,

                            EffectParameter::IntegerHint,   //hints

                            QVariant(G_PARAM_SPEC_INT(param)->default_value),

                            QVariant(G_PARAM_SPEC_INT(param)->minimum),

                            QVariant(G_PARAM_SPEC_INT(param)->maximum)));

                        break;

                    case G_TYPE_FLOAT:

                        m_parameterList.append(Phonon::EffectParameter(i, propertyName,

                            0,   //hints

                            QVariant((double)G_PARAM_SPEC_FLOAT(param)->default_value),

                            QVariant((double)G_PARAM_SPEC_FLOAT(param)->minimum),

                            QVariant((double)G_PARAM_SPEC_FLOAT(param)->maximum)));

                        break;

                    case G_TYPE_DOUBLE:

                        m_parameterList.append(Phonon::EffectParameter(i, propertyName,

                            0,   //hints

                            QVariant(G_PARAM_SPEC_DOUBLE(param)->default_value),

                            QVariant(G_PARAM_SPEC_DOUBLE(param)->minimum),

                            QVariant(G_PARAM_SPEC_DOUBLE(param)->maximum)));

                        break;

                    case G_TYPE_BOOLEAN:

                        m_parameterList.append(Phonon::EffectParameter(i, propertyName, 

                            Phonon::EffectParameter::ToggledHint,   //hints

                            QVariant((bool)G_PARAM_SPEC_BOOLEAN(param)->default_value),

                            QVariant((bool)false), QVariant((bool)true)));

                        break;

                    default:

                        break;

                }

            }

        }

    }

}

QList<Phonon::EffectParameter> Effect::parameters() const

{

    return m_parameterList;

}

QVariant Effect::parameterValue(const EffectParameter &p) const

{

    Q_ASSERT(m_effectElement);

    QVariant returnVal;

    switch (p.type()) {

        case QVariant::Int:

            {

                gint val = 0;

                g_object_get(G_OBJECT(m_effectElement), qPrintable(p.name()), &val, (const char*)NULL);

                returnVal = val;

            }

            break;

        case QVariant::Bool:

            {

                gboolean val = 0;

                g_object_get(G_OBJECT(m_effectElement), qPrintable(p.name()), &val, (const char*)NULL);

                returnVal = val;

            }

            break;

        case QVariant::String:

            {

                gchar *val = 0;

                g_object_get(G_OBJECT(m_effectElement), qPrintable(p.name()), &val, (const char*)NULL);

                returnVal = QString::fromUtf8(val);

                g_free(val);

            }

            break;

        case QVariant::Double:

            {

                GParamSpec* spec = g_object_class_find_property(G_OBJECT_GET_CLASS(m_effectElement), p.name().toLatin1().constData());

                Q_ASSERT(spec);

                if (spec && spec->value_type == G_TYPE_FLOAT) {

                    gfloat val = 0;

                    g_object_get(G_OBJECT(m_effectElement), qPrintable(p.name()), &val, (const char*)NULL);

                    returnVal = QVariant((float)val);

                } else {

                    gdouble val = 0;

                    g_object_get(G_OBJECT(m_effectElement), qPrintable(p.name()), &val, (const char*)NULL);

                    returnVal = QVariant((float)val);

                }

            }

            break;

        default:

            Q_ASSERT(0); //not a supported variant type

    }

    return returnVal;

}

void Effect::setParameterValue(const EffectParameter &p, const QVariant &v)

{

    Q_ASSERT(m_effectElement);

    // Note that the frontend currently calls this after creation with a null-value

    // for all parameters.

    if (v.isValid()) {

        switch (p.type()) {

            // ### range values should really be checked by the front end, why isnt it working?

            case QVariant::Int:

                if (v.toInt() >= p.minimumValue().toInt() && v.toInt() <= p.maximumValue().toInt())

                    g_object_set(G_OBJECT(m_effectElement), qPrintable(p.name()), (gint)v.toInt(), (const char*)NULL);

                break;

            case QVariant::Double:

                if (v.toDouble() >= p.minimumValue().toDouble() && v.toDouble() <= p.maximumValue().toDouble()) {

                    GParamSpec* spec = g_object_class_find_property(G_OBJECT_GET_CLASS(m_effectElement), p.name().toLatin1().constData());

                    Q_ASSERT(spec);

                    if (spec && spec->value_type == G_TYPE_FLOAT)

                        g_object_set(G_OBJECT(m_effectElement), qPrintable(p.name()), (gfloat)v.toDouble(), (const char*)NULL);

                    else

                        g_object_set(G_OBJECT(m_effectElement), qPrintable(p.name()), (gdouble)v.toDouble(), (const char*)NULL);

                }

                break;

            case QVariant::UInt:

                if (v.toUInt() >= p.minimumValue().toUInt() && v.toUInt() <= p.maximumValue().toUInt())

                    g_object_set(G_OBJECT(m_effectElement), qPrintable(p.name()), v.toUInt(), (const char*)NULL);

                break;

            case QVariant::String:

                g_object_set(G_OBJECT(m_effectElement), qPrintable(p.name()), v.toString().toUtf8().constData(), (const char*)NULL);

                break;

            case QVariant::Bool:

                g_object_set(G_OBJECT(m_effectElement), qPrintable(p.name()), (gboolean)v.toBool(), (const char*)NULL);

                break;

            default:

                Q_ASSERT(0); //not a supported variant type

        }

    }

}

}

} //namespace Phonon::Gstreamer

QT_END_NAMESPACE

#include "moc_effect.cpp"