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fsvalve: Add valve element

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20071024224147-3e2dc-f28ab0c073e283894b65c22c4f44397c897dec01.gz
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Olivier Crete 2007-10-24 22:41:47 +00:00 committed by Tim-Philipp Müller
parent 239a63a777
commit 5ddbaf15d5
2 changed files with 305 additions and 0 deletions
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232
plugins/elements/gstvalve.c Normal file
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/*
* 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")

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plugins/elements/gstvalve.h Normal file
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/*
* 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__ */