fsvalve: Add valve element

20071024224147-3e2dc-f28ab0c073e283894b65c22c4f44397c897dec01.gz

2 files changed, 305 insertions, 0 deletions

diff --git a/plugins/elements/gstvalve.c b/plugins/elements/gstvalve.c
new file mode 100644
index 0000000000..1f754922fe
--- /dev/null
+++ b/plugins/elements/gstvalve.c
@@ -0,0 +1,232 @@
+/*
+ * Farsight Voice+Video library
+ *
+ *  Copyright 2007 Collabora Ltd, 
+ *  Copyright 2007 Nokia Corporation
+ *   @author: Olivier Crete <olivier.crete@collabora.co.uk>
+ *
+ * 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.
+ *
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include "gstvalve.h"
+
+#include <string.h>
+
+GST_DEBUG_CATEGORY (valve_debug);
+#define GST_CAT_DEFAULT (valve_debug)
+
+/* elementfactory information */
+static const GstElementDetails gst_valve_details =
+GST_ELEMENT_DETAILS (
+  "Valve element",
+  "Filter",
+  "This element drops all packets when drop is TRUE",
+  "Olivier Crete <olivier.crete@collabora.co.uk>");
+
+
+static GstStaticPadTemplate sinktemplate = GST_STATIC_PAD_TEMPLATE ("sink",
+    GST_PAD_SINK,
+    GST_PAD_ALWAYS,
+    GST_STATIC_CAPS_ANY);
+
+static GstStaticPadTemplate srctemplate = GST_STATIC_PAD_TEMPLATE ("src",
+    GST_PAD_SRC,
+    GST_PAD_ALWAYS,
+    GST_STATIC_CAPS_ANY);
+
+/* Valve signals and args */
+enum
+{
+  /* FILL ME */
+  LAST_SIGNAL
+};
+
+enum
+{
+  ARG_0,
+  ARG_DROP,
+};
+
+
+
+
+static void gst_valve_set_property (GObject *object,
+    guint prop_id, const GValue * value, GParamSpec * pspec);
+static void gst_valve_get_property (GObject *object,
+    guint prop_id, GValue *value, GParamSpec *pspec);
+static void gst_valve_dispose (GObject *object);
+
+static GstFlowReturn
+gst_valve_transform_ip (GstBaseTransform *trans, GstBuffer *buf);
+static gboolean
+gst_valve_event (GstBaseTransform *trans, GstEvent *event);
+
+
+static void
+_do_init (GType type)
+{
+  GST_DEBUG_CATEGORY_INIT
+    (valve_debug, "valve", 0, "Valve");
+}
+
+GST_BOILERPLATE_FULL (GstValve, gst_valve, GstBaseTransform,
+    GST_TYPE_BASE_TRANSFORM, _do_init);
+
+static void
+gst_valve_base_init (gpointer klass)
+{
+  GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
+
+  gst_element_class_add_pad_template (element_class,
+      gst_static_pad_template_get (&srctemplate));
+  gst_element_class_add_pad_template (element_class,
+      gst_static_pad_template_get (&sinktemplate));
+
+  gst_element_class_set_details (element_class, &gst_valve_details);
+}
+
+static void
+gst_valve_class_init (GstValveClass *klass)
+{
+  GObjectClass *gobject_class;
+  GstBaseTransformClass *gstbasetransform_class;
+
+  gobject_class = (GObjectClass *) klass;
+  gstbasetransform_class = (GstBaseTransformClass *) klass;
+
+  gobject_class->dispose = GST_DEBUG_FUNCPTR (gst_valve_dispose);
+
+  gobject_class->set_property = GST_DEBUG_FUNCPTR (gst_valve_set_property);
+  gobject_class->get_property = GST_DEBUG_FUNCPTR (gst_valve_get_property);
+
+  gstbasetransform_class->transform_ip =
+      GST_DEBUG_FUNCPTR (gst_valve_transform_ip);
+  gstbasetransform_class->event =
+      GST_DEBUG_FUNCPTR (gst_valve_event);
+  gstbasetransform_class->src_event =
+      GST_DEBUG_FUNCPTR (gst_valve_event);
+
+  g_object_class_install_property (gobject_class, ARG_DROP,
+      g_param_spec_boolean ("drop",
+        "Drops all buffers if TRUE",
+        "If this property if TRUE, the element will drop all buffers, if its FALSE, it will let them through",
+          FALSE, G_PARAM_READWRITE));
+
+  parent_class = g_type_class_peek_parent (klass);
+}
+
+static void
+gst_valve_init (GstValve *valve,
+    GstValveClass *klass)
+{
+
+  valve->drop = 0;
+
+  gst_base_transform_set_passthrough ((GstBaseTransform *)valve, TRUE);
+
+}
+
+static void
+gst_valve_dispose (GObject *object)
+{
+  GstValve *valve = NULL;
+  valve = GST_VALVE (valve);
+
+  G_OBJECT_CLASS (parent_class)->dispose (object);
+}
+
+
+static void
+gst_valve_set_property (GObject *object,
+    guint prop_id, const GValue *value, GParamSpec *pspec)
+{
+  GstValve *valve = GST_VALVE (object);
+
+  switch (prop_id) {
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+      break;
+    case ARG_DROP:
+      GST_OBJECT_LOCK (object);
+      valve->drop = g_value_get_boolean (value);
+      GST_OBJECT_UNLOCK (object);
+      break;
+  }
+}
+
+static void
+gst_valve_get_property (GObject *object,
+    guint prop_id, GValue *value, GParamSpec *pspec)
+{
+  GstValve *valve = GST_VALVE (object);
+
+  switch (prop_id) {
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+      break;
+    case ARG_DROP:
+      GST_OBJECT_LOCK (object);
+      g_value_set_boolean (value, valve->drop);
+      GST_OBJECT_UNLOCK (object);
+      break;
+  }
+}
+
+static GstFlowReturn
+gst_valve_transform_ip (GstBaseTransform *trans, GstBuffer *buf)
+{
+  GstValve *valve = GST_VALVE (trans);
+  GstFlowReturn ret = GST_FLOW_OK;
+
+  GST_OBJECT_LOCK (GST_OBJECT (trans));
+  if (valve->drop)
+    ret = GST_BASE_TRANSFORM_FLOW_DROPPED;
+  GST_OBJECT_UNLOCK (GST_OBJECT (trans));
+
+  return ret;
+}
+
+static gboolean
+gst_valve_event (GstBaseTransform *trans, GstEvent *event)
+{
+  GstValve *valve = GST_VALVE (trans);
+  gboolean ret = TRUE;
+
+  GST_OBJECT_LOCK (GST_OBJECT (trans));
+  if (valve->drop)
+    ret = FALSE;
+  GST_OBJECT_UNLOCK (GST_OBJECT (trans));
+
+  return ret;
+}
+
+gboolean
+gst_valve_plugin_init (GstPlugin *plugin)
+{
+  return gst_element_register (plugin, "valve",
+      GST_RANK_MARGINAL, GST_TYPE_VALVE);
+}
+
+GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
+    GST_VERSION_MINOR,
+    "valve",
+    "Valve",
+    gst_valve_plugin_init, VERSION, "LGPL", "Farsight", "http://farsight.sf.net")
diff --git a/plugins/elements/gstvalve.h b/plugins/elements/gstvalve.h
new file mode 100644
index 0000000000..60f683f49f
--- /dev/null
+++ b/plugins/elements/gstvalve.h
@@ -0,0 +1,73 @@
+/*
+ * Farsight Voice+Video library
+ *
+ *  Copyright 2007 Collabora Ltd, 
+ *  Copyright 2007 Nokia Corporation
+ *   @author: Olivier Crete <olivier.crete@collabora.co.uk>
+ *
+ * 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.
+ *
+ */
+
+#ifndef __GST_VALVE_H__
+#define __GST_VALVE_H__
+
+#include <gst/gst.h>
+#include <gst/base/gstbasetransform.h>
+
+G_BEGIN_DECLS
+
+/* #define's don't like whitespacey bits */
+#define GST_TYPE_VALVE \
+  (gst_valve_get_type())
+#define GST_VALVE(obj) \
+  (G_TYPE_CHECK_INSTANCE_CAST((obj), \
+  GST_TYPE_VALVE,GstValve))
+#define GST_VALVE_CLASS(klass) \
+  (G_TYPE_CHECK_CLASS_CAST((klass), \
+  GST_TYPE_VALVE,GstValveClass))
+#define GST_IS_VALVE(obj) \
+  (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_VALVE))
+#define GST_IS_VALVE_CLASS(obj) \
+  (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_VALVE))
+
+typedef struct _GstValve GstValve;
+typedef struct _GstValveClass GstValveClass;
+typedef struct _GstValvePrivate GstValvePrivate;
+
+struct _GstValve
+{
+  GstBaseTransform parent;
+
+  gboolean      drop;
+
+  /*< private > */
+  gpointer _gst_reserved[GST_PADDING];
+};
+
+struct _GstValveClass
+{
+  GstBaseTransformClass parent_class;
+
+  /*< private > */
+  gpointer _gst_reserved[GST_PADDING];
+};
+
+GType gst_valve_get_type (void);
+
+G_END_DECLS
+
+#endif /* __GST_VALVE_H__ */