Ported gstreamer camera backend from camerabin to camerabin2.
Change-Id: Ieb08df492e7b9cbfe35e93a056685cfdac6e704e Reviewed-on: http://codereview.qt.nokia.com/2994 Reviewed-by: Qt Sanity Bot <qt_sanity_bot@ovi.com> Reviewed-by: Michael Goddard <michael.goddard@nokia.com>
This commit is contained in:
Dmytro Poplavskiy
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Qt by Nokia
Qt by Nokia
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abee3a6548
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da9b436cd1
182
src/plugins/gstreamer/qgstcodecsinfo.cpp
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182
src/plugins/gstreamer/qgstcodecsinfo.cpp
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/****************************************************************************
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**
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** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
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** All rights reserved.
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** Contact: Nokia Corporation (qt-info@nokia.com)
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**
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** This file is part of the Qt Toolkit.
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**
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** $QT_BEGIN_LICENSE:LGPL$
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** GNU Lesser General Public License Usage
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** This file may be used under the terms of the GNU Lesser General Public
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** License version 2.1 as published by the Free Software Foundation and
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** appearing in the file LICENSE.LGPL included in the packaging of this
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** file. Please review the following information to ensure the GNU Lesser
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** General Public License version 2.1 requirements will be met:
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** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
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**
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** In addition, as a special exception, Nokia gives you certain additional
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** rights. These rights are described in the Nokia Qt LGPL Exception
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** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
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**
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** GNU General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU General
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** Public License version 3.0 as published by the Free Software Foundation
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** and appearing in the file LICENSE.GPL included in the packaging of this
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** file. Please review the following information to ensure the GNU General
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** Public License version 3.0 requirements will be met:
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** http://www.gnu.org/copyleft/gpl.html.
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**
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** Other Usage
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** Alternatively, this file may be used in accordance with the terms and
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** conditions contained in a signed written agreement between you and Nokia.
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**
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**
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**
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**
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**
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** $QT_END_LICENSE$
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**
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****************************************************************************/
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#include "qgstcodecsinfo.h"
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#include <QtCore/qset.h>
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#ifdef QMEDIA_GSTREAMER_CAMERABIN
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#include <gst/pbutils/pbutils.h>
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#include <gst/pbutils/encoding-profile.h>
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#endif
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QGstCodecsInfo::QGstCodecsInfo(QGstCodecsInfo::ElementType elementType)
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{
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#if GST_CHECK_VERSION(0,10,31)
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GstElementFactoryListType gstElementType = 0;
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switch (elementType) {
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case AudioEncoder:
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gstElementType = GST_ELEMENT_FACTORY_TYPE_AUDIO_ENCODER;
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break;
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case VideoEncoder:
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gstElementType = GST_ELEMENT_FACTORY_TYPE_VIDEO_ENCODER;
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break;
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case Muxer:
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gstElementType = GST_ELEMENT_FACTORY_TYPE_MUXER;
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break;
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}
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GstCaps *allCaps = supportedElementCaps(gstElementType);
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GstCaps *caps = gst_caps_new_empty();
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uint codecsCount = gst_caps_get_size(allCaps);
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for (uint i=0; i<codecsCount; i++) {
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gst_caps_append_structure(caps, gst_caps_steal_structure(allCaps, 0));
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gchar * capsString = gst_caps_to_string(caps);
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QString codec = QLatin1String(capsString);
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m_codecs.append(codec);
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#ifdef QMEDIA_GSTREAMER_CAMERABIN
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gchar *description = gst_pb_utils_get_codec_description(caps);
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m_codecDescriptions.insert(codec, QString::fromUtf8(description));
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if (description)
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g_free(description);
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#else
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m_codecDescriptions.insert(codec, codec);
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#endif
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if (capsString)
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g_free(capsString);
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gst_caps_remove_structure(caps, 0);
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}
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#endif // GST_CHECK_VERSION(0,10,31)
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}
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QStringList QGstCodecsInfo::supportedCodecs() const
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{
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return m_codecs;
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}
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QString QGstCodecsInfo::codecDescription(const QString &codec) const
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{
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return m_codecDescriptions.value(codec);
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}
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#if GST_CHECK_VERSION(0,10,31)
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/*!
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List all supported caps for all installed elements of type \a elementType.
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Caps are simplified to mime type and a few field necessary to distinguish
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different codecs like mpegversion or layer.
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*/
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GstCaps* QGstCodecsInfo::supportedElementCaps(GstElementFactoryListType elementType,
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GstRank minimumRank,
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GstPadDirection padDirection)
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{
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GList *elements = gst_element_factory_list_get_elements(elementType, minimumRank);
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GstCaps *res = gst_caps_new_empty();
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QSet<QByteArray> fakeEncoderMimeTypes;
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fakeEncoderMimeTypes << "unknown/unknown"
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<< "audio/x-raw-int" << "audio/x-raw-float"
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<< "video/x-raw-yuv" << "video/x-raw-rgb";
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QSet<QByteArray> fieldsToAdd;
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fieldsToAdd << "mpegversion" << "layer" << "layout" << "raversion"
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<< "wmaversion" << "wmvversion" << "variant";
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GList *element = elements;
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while (element) {
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GstElementFactory *factory = (GstElementFactory *)element->data;
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element = element->next;
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const GList *padTemplates = gst_element_factory_get_static_pad_templates(factory);
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while (padTemplates) {
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GstStaticPadTemplate *padTemplate = (GstStaticPadTemplate *)padTemplates->data;
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padTemplates = padTemplates->next;
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if (padTemplate->direction == padDirection) {
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const GstCaps *caps = gst_static_caps_get(&padTemplate->static_caps);
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for (uint i=0; i<gst_caps_get_size(caps); i++) {
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const GstStructure *structure = gst_caps_get_structure(caps, i);
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//skip "fake" encoders
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if (fakeEncoderMimeTypes.contains(gst_structure_get_name(structure)))
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continue;
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GstStructure *newStructure = gst_structure_new(gst_structure_get_name(structure), NULL);
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//add structure fields to distinguish between formats with similar mime types,
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//like audio/mpeg
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for (int j=0; j<gst_structure_n_fields(structure); j++) {
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const gchar* fieldName = gst_structure_nth_field_name(structure, j);
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if (fieldsToAdd.contains(fieldName)) {
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const GValue *value = gst_structure_get_value(structure, fieldName);
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GType valueType = G_VALUE_TYPE(value);
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//don't add values of range type,
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//gst_pb_utils_get_codec_description complains about not fixed caps
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if (valueType != GST_TYPE_INT_RANGE && valueType != GST_TYPE_DOUBLE_RANGE &&
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valueType != GST_TYPE_FRACTION_RANGE && valueType != GST_TYPE_LIST &&
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valueType != GST_TYPE_ARRAY)
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gst_structure_set_value(newStructure, fieldName, value);
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}
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}
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gst_caps_merge_structure(res, newStructure);
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}
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}
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}
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}
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gst_plugin_feature_list_free(elements);
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return res;
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}
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#endif //GST_CHECK_VERSION(0,10,31)
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