diff options
author | VaL Doroshchuk <valentyn.doroshchuk@qt.io> | 2019-07-11 17:54:10 +0200 |
---|---|---|
committer | VaL Doroshchuk <valentyn.doroshchuk@qt.io> | 2019-07-17 10:55:30 +0200 |
commit | 411bd814849dace75ec755c46f668604eb6f4821 (patch) | |
tree | 9a1d0298b28cb1265d936d211005e4b613698319 /src/gsttools/qgstcodecsinfo.cpp | |
parent | ff7dcf3a38f33bb262c876ce1e959e7a1bc29f5a (diff) |
GStreamer: Implement fetching audio/video codecs by container
Moved stream types to QGstCodecsInfo and added possibility to fetch audio
or video codecs by a container. Or fetch containers by audio or video codec.
It would allow to debug supported codecs and containers:
QGstCodecsInfo containers(QGstCodecsInfo::Muxer);
QGstCodecsInfo audioCodecs(QGstCodecsInfo::AudioEncoder);
for (auto &container: containers.supportedCodecs())
qDebug() << audioCodecs.supportedCodecs(containers.supportedStreamTypes(container));
Change-Id: I26bf5579db6974a166d408c4865a9ffe314e3e15
Reviewed-by: Andy Shaw <andy.shaw@qt.io>
Diffstat (limited to 'src/gsttools/qgstcodecsinfo.cpp')
-rw-r--r-- | src/gsttools/qgstcodecsinfo.cpp | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/src/gsttools/qgstcodecsinfo.cpp b/src/gsttools/qgstcodecsinfo.cpp index ca43d489b..512bb828d 100644 --- a/src/gsttools/qgstcodecsinfo.cpp +++ b/src/gsttools/qgstcodecsinfo.cpp @@ -43,9 +43,36 @@ #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 @@ -245,3 +272,20 @@ GList *QGstCodecsInfo::elementFactories(ElementType elementType) const 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; +} |