Now parser is generic (just add/remove a list of chunks). And a template of muxer has been created.

Original commit message from CVS:
Now parser is generic (just add/remove a list of chunks). And a template of muxer has been created.

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);
+}