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/****************************************************************************
**
** Copyright (C) 2014 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** 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 Digia. For licensing terms and
** conditions see http://qt.digia.com/licensing. For further information
** use the contact form at http://qt.digia.com/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.
**
** In addition, as a special exception, Digia gives you certain additional
** rights. These rights are described in the Digia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include <QtCore/qstring.h>
#include <QtCore/qdebug.h>
#include <QtCore/QDir>
#include <QtCore/QDebug>
#include "qgstreamercaptureserviceplugin.h"
//#define QT_SUPPORTEDMIMETYPES_DEBUG
#include "qgstreamercaptureservice.h"
#include <private/qgstutils_p.h>
QMediaService* QGstreamerCaptureServicePlugin::create(const QString &key)
{
QGstUtils::initializeGst();
if (key == QLatin1String(Q_MEDIASERVICE_AUDIOSOURCE))
return new QGstreamerCaptureService(key);
#if defined(USE_GSTREAMER_CAMERA)
if (key == QLatin1String(Q_MEDIASERVICE_CAMERA))
return new QGstreamerCaptureService(key);
#endif
qWarning() << "Gstreamer capture service plugin: unsupported key:" << key;
return 0;
}
void QGstreamerCaptureServicePlugin::release(QMediaService *service)
{
delete service;
}
#if defined(USE_GSTREAMER_CAMERA)
QMediaServiceProviderHint::Features QGstreamerCaptureServicePlugin::supportedFeatures(
const QByteArray &service) const
{
if (service == Q_MEDIASERVICE_CAMERA)
return QMediaServiceProviderHint::VideoSurface;
return QMediaServiceProviderHint::Features();
}
QByteArray QGstreamerCaptureServicePlugin::defaultDevice(const QByteArray &service) const
{
return service == Q_MEDIASERVICE_CAMERA
? QGstUtils::enumerateCameras().value(0).name.toUtf8()
: QByteArray();
}
QList<QByteArray> QGstreamerCaptureServicePlugin::devices(const QByteArray &service) const
{
return service == Q_MEDIASERVICE_CAMERA ? QGstUtils::cameraDevices() : QList<QByteArray>();
}
QString QGstreamerCaptureServicePlugin::deviceDescription(const QByteArray &service, const QByteArray &device)
{
return service == Q_MEDIASERVICE_CAMERA ? QGstUtils::cameraDescription(deviceName) : QString();
}
QVariant QGstreamerCaptureServicePlugin::deviceProperty(const QByteArray &service, const QByteArray &device, const QByteArray &property)
{
Q_UNUSED(service);
Q_UNUSED(device);
Q_UNUSED(property);
return QVariant();
}
#endif
QMultimedia::SupportEstimate QGstreamerCaptureServicePlugin::hasSupport(const QString &mimeType,
const QStringList& codecs) const
{
if (m_supportedMimeTypeSet.isEmpty())
updateSupportedMimeTypes();
return QGstUtils::hasSupport(mimeType, codecs, m_supportedMimeTypeSet);
}
void QGstreamerCaptureServicePlugin::updateSupportedMimeTypes() const
{
//enumerate supported mime types
gst_init(NULL, NULL);
GList *plugins, *orig_plugins;
orig_plugins = plugins = gst_default_registry_get_plugin_list ();
while (plugins) {
GList *features, *orig_features;
GstPlugin *plugin = (GstPlugin *) (plugins->data);
plugins = g_list_next (plugins);
if (plugin->flags & (1<<1)) //GST_PLUGIN_FLAG_BLACKLISTED
continue;
orig_features = features = gst_registry_get_feature_list_by_plugin(gst_registry_get_default (),
plugin->desc.name);
while (features) {
if (!G_UNLIKELY(features->data == NULL)) {
GstPluginFeature *feature = GST_PLUGIN_FEATURE(features->data);
if (GST_IS_ELEMENT_FACTORY (feature)) {
GstElementFactory *factory = GST_ELEMENT_FACTORY(gst_plugin_feature_load(feature));
if (factory
&& factory->numpadtemplates > 0
&& (qstrcmp(factory->details.klass, "Codec/Decoder/Audio") == 0
|| qstrcmp(factory->details.klass, "Codec/Decoder/Video") == 0
|| qstrcmp(factory->details.klass, "Codec/Demux") == 0 )) {
const GList *pads = factory->staticpadtemplates;
while (pads) {
GstStaticPadTemplate *padtemplate = (GstStaticPadTemplate*)(pads->data);
pads = g_list_next (pads);
if (padtemplate->direction != GST_PAD_SINK)
continue;
if (padtemplate->static_caps.string) {
GstCaps *caps = gst_static_caps_get(&padtemplate->static_caps);
if (!gst_caps_is_any (caps) && ! gst_caps_is_empty (caps)) {
for (guint i = 0; i < gst_caps_get_size(caps); i++) {
GstStructure *structure = gst_caps_get_structure(caps, i);
QString nameLowcase = QString(gst_structure_get_name (structure)).toLower();
m_supportedMimeTypeSet.insert(nameLowcase);
if (nameLowcase.contains("mpeg")) {
//Because mpeg version number is only included in the detail
//description, it is necessary to manually extract this information
//in order to match the mime type of mpeg4.
const GValue *value = gst_structure_get_value(structure, "mpegversion");
if (value) {
gchar *str = gst_value_serialize (value);
QString versions(str);
QStringList elements = versions.split(QRegExp("\\D+"), QString::SkipEmptyParts);
foreach (const QString &e, elements)
m_supportedMimeTypeSet.insert(nameLowcase + e);
g_free (str);
}
}
}
}
gst_caps_unref(caps);
}
}
gst_object_unref (factory);
}
} else if (GST_IS_TYPE_FIND_FACTORY(feature)) {
QString name(gst_plugin_feature_get_name(feature));
if (name.contains('/')) //filter out any string without '/' which is obviously not a mime type
m_supportedMimeTypeSet.insert(name.toLower());
}
}
features = g_list_next (features);
}
gst_plugin_feature_list_free (orig_features);
}
gst_plugin_list_free (orig_plugins);
#if defined QT_SUPPORTEDMIMETYPES_DEBUG
QStringList list = m_supportedMimeTypeSet.toList();
list.sort();
if (qgetenv("QT_DEBUG_PLUGINS").toInt() > 0) {
foreach (const QString &type, list)
qDebug() << type;
}
#endif
}
QStringList QGstreamerCaptureServicePlugin::supportedMimeTypes() const
{
return QStringList();
}
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