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Diffstat (limited to 'ext/metadata/gstmetadatamux.c')
-rw-r--r-- | ext/metadata/gstmetadatamux.c | 243 |
1 files changed, 243 insertions, 0 deletions
diff --git a/ext/metadata/gstmetadatamux.c b/ext/metadata/gstmetadatamux.c new file mode 100644 index 00000000..556191b7 --- /dev/null +++ b/ext/metadata/gstmetadatamux.c @@ -0,0 +1,243 @@ +/* + * GStreamer + * Copyright 2007 Edgard Lima <edgard.lima@indt.org.br> + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the "Software"), + * to deal in the Software without restriction, including without limitation + * the rights to use, copy, modify, merge, publish, distribute, sublicense, + * and/or sell copies of the Software, and to permit persons to whom the + * Software is furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING + * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER + * DEALINGS IN THE SOFTWARE. + * + * Alternatively, the contents of this file may be used under the + * GNU Lesser General Public License Version 2.1 (the "LGPL"), in + * which case the following provisions apply instead of the ones + * mentioned above: + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Library General Public + * License as published by the Free Software Foundation; either + * version 2 of the License, or (at your option) any later version. + * + * This library is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Library General Public License for more details. + * + * You should have received a copy of the GNU Library General Public + * License along with this library; if not, write to the + * Free Software Foundation, Inc., 59 Temple Place - Suite 330, + * Boston, MA 02111-1307, USA. + */ + +/** + * SECTION:element-plugin + * + * <refsect2> + * <title>Example launch line</title> + * <para> + * <programlisting> + * gst-launch -v -m filesrc location=./test.jpeg ! metadatamux ! filesink location=meta.jpeg + * </programlisting> + * </para> + * </refsect2> + */ + +#ifdef HAVE_CONFIG_H +# include <config.h> +#endif + +#include <gst/gst.h> + +#include "gstmetadatamux.h" + +GST_DEBUG_CATEGORY_STATIC (gst_metadata_mux_debug); +#define GST_CAT_DEFAULT gst_metadata_mux_debug + +/* Filter signals and args */ +enum +{ + /* FILL ME */ + LAST_SIGNAL +}; + +enum +{ + ARG_0, +}; + +static GstStaticPadTemplate sink_factory = GST_STATIC_PAD_TEMPLATE ("sink", + GST_PAD_SINK, + GST_PAD_ALWAYS, + GST_STATIC_CAPS ("image/jpeg, tags-extracted = (bool) true;" + "image/png, tags-extracted = (bool) true") + ); + +static GstStaticPadTemplate src_factory = GST_STATIC_PAD_TEMPLATE ("src", + GST_PAD_SRC, + GST_PAD_ALWAYS, + GST_STATIC_CAPS ("image/jpeg; " "image/png") + ); + +GST_BOILERPLATE (GstMetadataMux, gst_metadata_mux, GstElement, + GST_TYPE_ELEMENT); + +static void gst_metadata_mux_set_property (GObject * object, guint prop_id, + const GValue * value, GParamSpec * pspec); +static void gst_metadata_mux_get_property (GObject * object, guint prop_id, + GValue * value, GParamSpec * pspec); + +static gboolean gst_metadata_mux_set_caps (GstPad * pad, GstCaps * caps); +static GstFlowReturn gst_metadata_mux_chain (GstPad * pad, GstBuffer * buf); + +static void +gst_metadata_mux_base_init (gpointer gclass) +{ + static GstElementDetails element_details = { + "PluginTemplate", + "Generic/PluginTemplate", + "Generic Template Element", + "Thomas Vander Stichele <thomas@apestaart.org>" + }; + GstElementClass *element_class = GST_ELEMENT_CLASS (gclass); + + gst_element_class_add_pad_template (element_class, + gst_static_pad_template_get (&src_factory)); + gst_element_class_add_pad_template (element_class, + gst_static_pad_template_get (&sink_factory)); + gst_element_class_set_details (element_class, &element_details); +} + +/* initialize the plugin's class */ +static void +gst_metadata_mux_class_init (GstMetadataMuxClass * klass) +{ + GObjectClass *gobject_class; + GstElementClass *gstelement_class; + + gobject_class = (GObjectClass *) klass; + gstelement_class = (GstElementClass *) klass; + + gobject_class->set_property = gst_metadata_mux_set_property; + gobject_class->get_property = gst_metadata_mux_get_property; + + +} + +/* initialize the new element + * instantiate pads and add them to element + * set functions + * initialize structure + */ +static void +gst_metadata_mux_init (GstMetadataMux * filter, GstMetadataMuxClass * gclass) +{ + GstElementClass *klass = GST_ELEMENT_GET_CLASS (filter); + + filter->sinkpad = + gst_pad_new_from_template (gst_element_class_get_pad_template (klass, + "sink"), "sink"); + gst_pad_set_setcaps_function (filter->sinkpad, + GST_DEBUG_FUNCPTR (gst_metadata_mux_set_caps)); + gst_pad_set_getcaps_function (filter->sinkpad, + GST_DEBUG_FUNCPTR (gst_pad_proxy_getcaps)); + + filter->srcpad = + gst_pad_new_from_template (gst_element_class_get_pad_template (klass, + "src"), "src"); + gst_pad_set_getcaps_function (filter->srcpad, + GST_DEBUG_FUNCPTR (gst_pad_proxy_getcaps)); + + gst_element_add_pad (GST_ELEMENT (filter), filter->sinkpad); + gst_element_add_pad (GST_ELEMENT (filter), filter->srcpad); + gst_pad_set_chain_function (filter->sinkpad, + GST_DEBUG_FUNCPTR (gst_metadata_mux_chain)); + +} + +static void +gst_metadata_mux_set_property (GObject * object, guint prop_id, + const GValue * value, GParamSpec * pspec) +{ + GstMetadataMux *filter = GST_METADATA_MUX (object); + + switch (prop_id) { + default: + G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); + break; + } +} + +static void +gst_metadata_mux_get_property (GObject * object, guint prop_id, + GValue * value, GParamSpec * pspec) +{ + GstMetadataMux *filter = GST_METADATA_MUX (object); + + switch (prop_id) { + default: + G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); + break; + } +} + +/* GstElement vmethod implementations */ + +/* this function handles the link with other elements */ +static gboolean +gst_metadata_mux_set_caps (GstPad * pad, GstCaps * caps) +{ + GstMetadataMux *filter; + GstPad *otherpad; + + filter = GST_METADATA_MUX (gst_pad_get_parent (pad)); + otherpad = (pad == filter->srcpad) ? filter->sinkpad : filter->srcpad; + + return gst_pad_set_caps (pad, caps); +} + +/* chain function + * this function does the actual processing + */ + +static GstFlowReturn +gst_metadata_mux_chain (GstPad * pad, GstBuffer * buf) +{ + GstMetadataMux *filter; + + filter = GST_METADATA_MUX (GST_OBJECT_PARENT (pad)); + + /* just push out the incoming buffer without touching it */ + return gst_pad_push (filter->srcpad, buf); +} + + +/* entry point to initialize the plug-in + * initialize the plug-in itself + * register the element factories and pad templates + * register the features + * + * exchange the string 'plugin' with your elemnt name + */ +gboolean +gst_metadata_mux_plugin_init (GstPlugin * plugin) +{ + /* exchange the strings 'plugin' and 'Template plugin' with your + * plugin name and description */ + GST_DEBUG_CATEGORY_INIT (gst_metadata_mux_debug, "metadatamux", + 0, "Metadata muxer"); + + return gst_element_register (plugin, "metadatamux", + GST_RANK_NONE, GST_TYPE_METADATA_MUX); +} |