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/****************************************************************************
**
** Copyright (C) 2015 The Qt Company Ltd.
** Contact: http://www.qt.io/licensing/
**
** This file is part of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL21$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see http://www.qt.io/terms-conditions. For further
** information use the contact form at http://www.qt.io/contact-us.
**
** 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 or version 3 as published by the Free
** Software Foundation and appearing in the file LICENSE.LGPLv21 and
** LICENSE.LGPLv3 included in the packaging of this file. Please review the
** following information to ensure the GNU Lesser General Public License
** requirements will be met: https://www.gnu.org/licenses/lgpl.html and
** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** As a special exception, The Qt Company gives you certain additional
** rights. These rights are described in The Qt Company LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "qgstcodecsinfo_p.h"
#include "qgstutils_p.h"
#include <QtCore/qset.h>
#ifdef QMEDIA_GSTREAMER_CAMERABIN
#include <gst/pbutils/pbutils.h>
#include <gst/pbutils/encoding-profile.h>
#endif
QGstCodecsInfo::QGstCodecsInfo(QGstCodecsInfo::ElementType elementType)
{
#if GST_CHECK_VERSION(0,10,31)
GstElementFactoryListType gstElementType = 0;
switch (elementType) {
case AudioEncoder:
gstElementType = GST_ELEMENT_FACTORY_TYPE_AUDIO_ENCODER;
break;
case VideoEncoder:
gstElementType = GST_ELEMENT_FACTORY_TYPE_VIDEO_ENCODER;
break;
case Muxer:
gstElementType = GST_ELEMENT_FACTORY_TYPE_MUXER;
break;
}
GstCaps *allCaps = supportedElementCaps(gstElementType);
GstCaps *caps = gst_caps_new_empty();
uint codecsCount = gst_caps_get_size(allCaps);
for (uint i=0; i<codecsCount; i++) {
gst_caps_append_structure(caps, gst_caps_steal_structure(allCaps, 0));
gchar * capsString = gst_caps_to_string(caps);
QString codec = QLatin1String(capsString);
m_codecs.append(codec);
#ifdef QMEDIA_GSTREAMER_CAMERABIN
gchar *description = gst_pb_utils_get_codec_description(caps);
m_codecDescriptions.insert(codec, QString::fromUtf8(description));
if (description)
g_free(description);
#else
m_codecDescriptions.insert(codec, codec);
#endif
if (capsString)
g_free(capsString);
gst_caps_remove_structure(caps, 0);
}
gst_caps_unref(caps);
gst_caps_unref(allCaps);
#else
Q_UNUSED(elementType);
#endif // GST_CHECK_VERSION(0,10,31)
}
QStringList QGstCodecsInfo::supportedCodecs() const
{
return m_codecs;
}
QString QGstCodecsInfo::codecDescription(const QString &codec) const
{
return m_codecDescriptions.value(codec);
}
#if GST_CHECK_VERSION(0,10,31)
/*!
List all supported caps for all installed elements of type \a elementType.
Caps are simplified to mime type and a few field necessary to distinguish
different codecs like mpegversion or layer.
*/
GstCaps* QGstCodecsInfo::supportedElementCaps(GstElementFactoryListType elementType,
GstRank minimumRank,
GstPadDirection padDirection)
{
GList *elements = gst_element_factory_list_get_elements(elementType, minimumRank);
GstCaps *res = gst_caps_new_empty();
QSet<QByteArray> fakeEncoderMimeTypes;
fakeEncoderMimeTypes << "unknown/unknown"
<< "audio/x-raw-int" << "audio/x-raw-float"
<< "video/x-raw-yuv" << "video/x-raw-rgb";
QSet<QByteArray> fieldsToAdd;
fieldsToAdd << "mpegversion" << "layer" << "layout" << "raversion"
<< "wmaversion" << "wmvversion" << "variant";
GList *element = elements;
while (element) {
GstElementFactory *factory = (GstElementFactory *)element->data;
element = element->next;
const GList *padTemplates = gst_element_factory_get_static_pad_templates(factory);
while (padTemplates) {
GstStaticPadTemplate *padTemplate = (GstStaticPadTemplate *)padTemplates->data;
padTemplates = padTemplates->next;
if (padTemplate->direction == padDirection) {
GstCaps *caps = gst_static_caps_get(&padTemplate->static_caps);
for (uint i=0; i<gst_caps_get_size(caps); i++) {
const GstStructure *structure = gst_caps_get_structure(caps, i);
//skip "fake" encoders
if (fakeEncoderMimeTypes.contains(gst_structure_get_name(structure)))
continue;
GstStructure *newStructure = qt_gst_structure_new_empty(gst_structure_get_name(structure));
//add structure fields to distinguish between formats with similar mime types,
//like audio/mpeg
for (int j=0; j<gst_structure_n_fields(structure); j++) {
const gchar* fieldName = gst_structure_nth_field_name(structure, j);
if (fieldsToAdd.contains(fieldName)) {
const GValue *value = gst_structure_get_value(structure, fieldName);
GType valueType = G_VALUE_TYPE(value);
//don't add values of range type,
//gst_pb_utils_get_codec_description complains about not fixed caps
if (valueType != GST_TYPE_INT_RANGE && valueType != GST_TYPE_DOUBLE_RANGE &&
valueType != GST_TYPE_FRACTION_RANGE && valueType != GST_TYPE_LIST &&
valueType != GST_TYPE_ARRAY)
gst_structure_set_value(newStructure, fieldName, value);
}
}
#if GST_CHECK_VERSION(1,0,0)
res =
#endif
gst_caps_merge_structure(res, newStructure);
}
gst_caps_unref(caps);
}
}
}
gst_plugin_feature_list_free(elements);
return res;
}
#endif //GST_CHECK_VERSION(0,10,31)
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