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| ** Public license version 3 or any later version approved by the KDE Free |
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| ****************************************************************************/ |
| |
| #include "qgstcodecsinfo_p.h" |
| #include "qgstutils_p.h" |
| #include <QtCore/qset.h> |
| |
| #include <gst/pbutils/pbutils.h> |
| |
| static QSet<QString> streamTypes(GstElementFactory *factory, GstPadDirection direction) |
| { |
| QSet<QString> types; |
| const GList *pads = gst_element_factory_get_static_pad_templates(factory); |
| for (const GList *pad = pads; pad; pad = g_list_next(pad)) { |
| GstStaticPadTemplate *templ = reinterpret_cast<GstStaticPadTemplate *>(pad->data); |
| if (templ->direction == direction) { |
| GstCaps *caps = gst_static_caps_get(&templ->static_caps); |
| for (uint i = 0; i < gst_caps_get_size(caps); ++i) { |
| GstStructure *structure = gst_caps_get_structure(caps, i); |
| types.insert(QString::fromUtf8(gst_structure_get_name(structure))); |
| } |
| gst_caps_unref(caps); |
| } |
| } |
| |
| return types; |
| } |
| |
| QGstCodecsInfo::QGstCodecsInfo(QGstCodecsInfo::ElementType elementType) |
| { |
| updateCodecs(elementType); |
| for (auto &codec : supportedCodecs()) { |
| GstElementFactory *factory = gst_element_factory_find(codecElement(codec).constData()); |
| if (factory) { |
| GstPadDirection direction = elementType == Muxer ? GST_PAD_SINK : GST_PAD_SRC; |
| m_streamTypes.insert(codec, streamTypes(factory, direction)); |
| gst_object_unref(GST_OBJECT(factory)); |
| } |
| } |
| } |
| |
| QStringList QGstCodecsInfo::supportedCodecs() const |
| { |
| return m_codecs; |
| } |
| |
| QString QGstCodecsInfo::codecDescription(const QString &codec) const |
| { |
| return m_codecInfo.value(codec).description; |
| } |
| |
| QByteArray QGstCodecsInfo::codecElement(const QString &codec) const |
| |
| { |
| return m_codecInfo.value(codec).elementName; |
| } |
| |
| QStringList QGstCodecsInfo::codecOptions(const QString &codec) const |
| { |
| QStringList options; |
| |
| QByteArray elementName = m_codecInfo.value(codec).elementName; |
| if (elementName.isEmpty()) |
| return options; |
| |
| GstElement *element = gst_element_factory_make(elementName, nullptr); |
| if (element) { |
| guint numProperties; |
| GParamSpec **properties = g_object_class_list_properties(G_OBJECT_GET_CLASS(element), |
| &numProperties); |
| for (guint j = 0; j < numProperties; ++j) { |
| GParamSpec *property = properties[j]; |
| // ignore some properties |
| if (strcmp(property->name, "name") == 0 || strcmp(property->name, "parent") == 0) |
| continue; |
| |
| options.append(QLatin1String(property->name)); |
| } |
| g_free(properties); |
| gst_object_unref(element); |
| } |
| |
| return options; |
| } |
| |
| void QGstCodecsInfo::updateCodecs(ElementType elementType) |
| { |
| m_codecs.clear(); |
| m_codecInfo.clear(); |
| |
| GList *elements = elementFactories(elementType); |
| |
| 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" << "systemstream"; |
| |
| 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 == GST_PAD_SRC) { |
| 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); |
| } |
| } |
| |
| GstCaps *newCaps = gst_caps_new_full(newStructure, nullptr); |
| |
| gchar *capsString = gst_caps_to_string(newCaps); |
| QString codec = QLatin1String(capsString); |
| if (capsString) |
| g_free(capsString); |
| GstRank rank = GstRank(gst_plugin_feature_get_rank(GST_PLUGIN_FEATURE(factory))); |
| |
| // If two elements provide the same codec, use the highest ranked one |
| QMap<QString, CodecInfo>::const_iterator it = m_codecInfo.constFind(codec); |
| if (it == m_codecInfo.constEnd() || it->rank < rank) { |
| if (it == m_codecInfo.constEnd()) |
| m_codecs.append(codec); |
| |
| CodecInfo info; |
| info.elementName = gst_plugin_feature_get_name(GST_PLUGIN_FEATURE(factory)); |
| |
| gchar *description = gst_pb_utils_get_codec_description(newCaps); |
| info.description = QString::fromUtf8(description); |
| if (description) |
| g_free(description); |
| |
| info.rank = rank; |
| |
| m_codecInfo.insert(codec, info); |
| } |
| |
| gst_caps_unref(newCaps); |
| } |
| gst_caps_unref(caps); |
| } |
| } |
| } |
| |
| gst_plugin_feature_list_free(elements); |
| } |
| |
| #if !GST_CHECK_VERSION(0, 10, 31) |
| static gboolean element_filter(GstPluginFeature *feature, gpointer user_data) |
| { |
| if (Q_UNLIKELY(!GST_IS_ELEMENT_FACTORY(feature))) |
| return FALSE; |
| |
| const QGstCodecsInfo::ElementType type = *reinterpret_cast<QGstCodecsInfo::ElementType *>(user_data); |
| |
| const gchar *klass = gst_element_factory_get_klass(GST_ELEMENT_FACTORY(feature)); |
| if (type == QGstCodecsInfo::AudioEncoder && !(strstr(klass, "Encoder") && strstr(klass, "Audio"))) |
| return FALSE; |
| if (type == QGstCodecsInfo::VideoEncoder && !(strstr(klass, "Encoder") && strstr(klass, "Video"))) |
| return FALSE; |
| if (type == QGstCodecsInfo::Muxer && !strstr(klass, "Muxer")) |
| return FALSE; |
| |
| guint rank = gst_plugin_feature_get_rank(feature); |
| if (rank < GST_RANK_MARGINAL) |
| return FALSE; |
| |
| return TRUE; |
| } |
| |
| static gint compare_plugin_func(const void *item1, const void *item2) |
| { |
| GstPluginFeature *f1 = reinterpret_cast<GstPluginFeature *>(const_cast<void *>(item1)); |
| GstPluginFeature *f2 = reinterpret_cast<GstPluginFeature *>(const_cast<void *>(item2)); |
| |
| gint diff = gst_plugin_feature_get_rank(f2) - gst_plugin_feature_get_rank(f1); |
| if (diff != 0) |
| return diff; |
| |
| return strcmp(gst_plugin_feature_get_name(f1), gst_plugin_feature_get_name (f2)); |
| } |
| #endif |
| |
| GList *QGstCodecsInfo::elementFactories(ElementType elementType) const |
| { |
| #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; |
| } |
| |
| GList *list = gst_element_factory_list_get_elements(gstElementType, GST_RANK_MARGINAL); |
| if (elementType == AudioEncoder) { |
| // Manually add "audioconvert" to the list |
| // to allow linking with various containers. |
| auto factory = gst_element_factory_find("audioconvert"); |
| if (factory) |
| list = g_list_prepend(list, factory); |
| } |
| |
| return list; |
| #else |
| GList *result = gst_registry_feature_filter(gst_registry_get_default(), |
| element_filter, |
| FALSE, &elementType); |
| result = g_list_sort(result, compare_plugin_func); |
| return result; |
| #endif |
| } |
| |
| QSet<QString> QGstCodecsInfo::supportedStreamTypes(const QString &codec) const |
| { |
| return m_streamTypes.value(codec); |
| } |
| |
| QStringList QGstCodecsInfo::supportedCodecs(const QSet<QString> &types) const |
| { |
| QStringList result; |
| for (auto &candidate : supportedCodecs()) { |
| auto candidateTypes = supportedStreamTypes(candidate); |
| if (candidateTypes.intersects(types)) |
| result << candidate; |
| } |
| |
| return result; |
| } |
