diff options
Diffstat (limited to 'src/plugins/gstreamer/qgstcodecsinfo.cpp')
| -rw-r--r-- | src/plugins/gstreamer/qgstcodecsinfo.cpp | 182 |
1 files changed, 182 insertions, 0 deletions
diff --git a/src/plugins/gstreamer/qgstcodecsinfo.cpp b/src/plugins/gstreamer/qgstcodecsinfo.cpp new file mode 100644 index 000000000..f823281d5 --- /dev/null +++ b/src/plugins/gstreamer/qgstcodecsinfo.cpp @@ -0,0 +1,182 @@ +/**************************************************************************** +** +** 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 Toolkit. +** +** $QT_BEGIN_LICENSE:LGPL$ +** GNU Lesser General Public License Usage +** 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. +** +** GNU General Public License Usage +** Alternatively, this file may be used under the terms of the GNU General +** Public License version 3.0 as published by the Free Software Foundation +** and appearing in the file LICENSE.GPL included in the packaging of this +** file. Please review the following information to ensure the GNU General +** Public License version 3.0 requirements will be met: +** http://www.gnu.org/copyleft/gpl.html. +** +** Other Usage +** Alternatively, this file may be used in accordance with the terms and +** conditions contained in a signed written agreement between you and Nokia. +** +** +** +** +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#include "qgstcodecsinfo.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); + } + +#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) { + const 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 = gst_structure_new(gst_structure_get_name(structure), NULL); + + //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); + } + } + + gst_caps_merge_structure(res, newStructure); + } + } + } + } + gst_plugin_feature_list_free(elements); + + return res; +} +#endif //GST_CHECK_VERSION(0,10,31) |