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/****************************************************************************
**
** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the Qt Mobility Components.
**
** $QT_BEGIN_LICENSE:LGPL$
** No Commercial Usage
** This file contains pre-release code and may not be distributed.
** You may use this file in accordance with the terms and conditions
** contained in the Technology Preview License Agreement accompanying
** this package.
**
** GNU Lesser General Public License Usage
** Alternatively, 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.
**
** If you have questions regarding the use of this file, please contact
** Nokia at qt-info@nokia.com.
**
**
**
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "qgstutils.h"
#include <QtCore/qdatetime.h>
#include <QtCore/qbytearray.h>
#include <QtCore/qvariant.h>
#include <QtCore/qsize.h>
//internal
static void addTagToMap(const GstTagList *list,
const gchar *tag,
gpointer user_data)
{
QMap<QByteArray, QVariant> *map = reinterpret_cast<QMap<QByteArray, QVariant>* >(user_data);
GValue val;
val.g_type = 0;
gst_tag_list_copy_value(&val,list,tag);
switch( G_VALUE_TYPE(&val) ) {
case G_TYPE_STRING:
{
const gchar *str_value = g_value_get_string(&val);
map->insert(QByteArray(tag), QString::fromUtf8(str_value));
break;
}
case G_TYPE_INT:
map->insert(QByteArray(tag), g_value_get_int(&val));
break;
case G_TYPE_UINT:
map->insert(QByteArray(tag), g_value_get_uint(&val));
break;
case G_TYPE_LONG:
map->insert(QByteArray(tag), qint64(g_value_get_long(&val)));
break;
case G_TYPE_BOOLEAN:
map->insert(QByteArray(tag), g_value_get_boolean(&val));
break;
case G_TYPE_CHAR:
map->insert(QByteArray(tag), g_value_get_char(&val));
break;
case G_TYPE_DOUBLE:
map->insert(QByteArray(tag), g_value_get_double(&val));
break;
default:
// GST_TYPE_DATE is a function, not a constant, so pull it out of the switch
if (G_VALUE_TYPE(&val) == GST_TYPE_DATE) {
const GDate *date = gst_value_get_date(&val);
if (g_date_valid(date)) {
int year = g_date_get_year(date);
int month = g_date_get_month(date);
int day = g_date_get_day(date);
map->insert(QByteArray(tag), QDate(year,month,day));
if (!map->contains("year"))
map->insert("year", year);
}
} else if (G_VALUE_TYPE(&val) == GST_TYPE_FRACTION) {
int nom = gst_value_get_fraction_numerator(&val);
int denom = gst_value_get_fraction_denominator(&val);
if (denom > 0) {
map->insert(QByteArray(tag), double(nom)/denom);
}
}
break;
}
g_value_unset(&val);
}
/*!
Convert GstTagList structure to QMap<QByteArray, QVariant>.
Mapping to int, bool, char, string, fractions and date are supported.
Fraction values are converted to doubles.
*/
QMap<QByteArray, QVariant> QGstUtils::gstTagListToMap(const GstTagList *tags)
{
QMap<QByteArray, QVariant> res;
gst_tag_list_foreach(tags, addTagToMap, &res);
return res;
}
/*!
Returns resolution of \a caps.
If caps doesn't have a valid size, and ampty QSize is returned.
*/
QSize QGstUtils::capsResolution(const GstCaps *caps)
{
QSize size;
if (caps) {
const GstStructure *structure = gst_caps_get_structure(caps, 0);
gst_structure_get_int(structure, "width", &size.rwidth());
gst_structure_get_int(structure, "height", &size.rheight());
}
return size;
}
/*!
Returns aspect ratio corrected resolution of \a caps.
If caps doesn't have a valid size, and ampty QSize is returned.
*/
QSize QGstUtils::capsCorrectedResolution(const GstCaps *caps)
{
QSize size;
if (caps) {
const GstStructure *structure = gst_caps_get_structure(caps, 0);
gst_structure_get_int(structure, "width", &size.rwidth());
gst_structure_get_int(structure, "height", &size.rheight());
gint aspectNum = 0;
gint aspectDenum = 0;
if (!size.isEmpty() && gst_structure_get_fraction(
structure, "pixel-aspect-ratio", &aspectNum, &aspectDenum)) {
if (aspectDenum > 0)
size.setWidth(qRound(size.width()*aspectNum/aspectDenum));
}
}
return size;
}
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