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Diffstat (limited to 'src/plugins/gstreamer/qgstutils.cpp')
| -rw-r--r-- | src/plugins/gstreamer/qgstutils.cpp | 165 |
1 files changed, 165 insertions, 0 deletions
diff --git a/src/plugins/gstreamer/qgstutils.cpp b/src/plugins/gstreamer/qgstutils.cpp new file mode 100644 index 000000000..a0f2a9832 --- /dev/null +++ b/src/plugins/gstreamer/qgstutils.cpp @@ -0,0 +1,165 @@ +/**************************************************************************** +** +** 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; +} |