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fsvalve: Add valve element
20071024224147-3e2dc-f28ab0c073e283894b65c22c4f44397c897dec01.gz
This commit is contained in:
Olivier Crete
Tim-Philipp Müller
parent
239a63a777
commit
5ddbaf15d5
2 changed files with 305 additions and 0 deletions
232
plugins/elements/gstvalve.c
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232
plugins/elements/gstvalve.c
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/*
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* Farsight Voice+Video library
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*
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* Copyright 2007 Collabora Ltd,
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* Copyright 2007 Nokia Corporation
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* @author: Olivier Crete <olivier.crete@collabora.co.uk>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include "gstvalve.h"
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#include <string.h>
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GST_DEBUG_CATEGORY (valve_debug);
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#define GST_CAT_DEFAULT (valve_debug)
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/* elementfactory information */
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static const GstElementDetails gst_valve_details =
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GST_ELEMENT_DETAILS (
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"Valve element",
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"Filter",
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"This element drops all packets when drop is TRUE",
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"Olivier Crete <olivier.crete@collabora.co.uk>");
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static GstStaticPadTemplate sinktemplate = GST_STATIC_PAD_TEMPLATE ("sink",
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GST_PAD_SINK,
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GST_PAD_ALWAYS,
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GST_STATIC_CAPS_ANY);
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static GstStaticPadTemplate srctemplate = GST_STATIC_PAD_TEMPLATE ("src",
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GST_PAD_SRC,
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GST_PAD_ALWAYS,
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GST_STATIC_CAPS_ANY);
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/* Valve signals and args */
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enum
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{
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/* FILL ME */
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LAST_SIGNAL
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};
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enum
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{
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ARG_0,
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ARG_DROP,
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};
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static void gst_valve_set_property (GObject *object,
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guint prop_id, const GValue * value, GParamSpec * pspec);
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static void gst_valve_get_property (GObject *object,
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guint prop_id, GValue *value, GParamSpec *pspec);
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static void gst_valve_dispose (GObject *object);
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static GstFlowReturn
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gst_valve_transform_ip (GstBaseTransform *trans, GstBuffer *buf);
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static gboolean
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gst_valve_event (GstBaseTransform *trans, GstEvent *event);
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static void
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_do_init (GType type)
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{
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GST_DEBUG_CATEGORY_INIT
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(valve_debug, "valve", 0, "Valve");
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}
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GST_BOILERPLATE_FULL (GstValve, gst_valve, GstBaseTransform,
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GST_TYPE_BASE_TRANSFORM, _do_init);
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static void
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gst_valve_base_init (gpointer klass)
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{
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GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
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gst_element_class_add_pad_template (element_class,
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gst_static_pad_template_get (&srctemplate));
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gst_element_class_add_pad_template (element_class,
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gst_static_pad_template_get (&sinktemplate));
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gst_element_class_set_details (element_class, &gst_valve_details);
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}
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static void
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gst_valve_class_init (GstValveClass *klass)
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{
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GObjectClass *gobject_class;
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GstBaseTransformClass *gstbasetransform_class;
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gobject_class = (GObjectClass *) klass;
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gstbasetransform_class = (GstBaseTransformClass *) klass;
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gobject_class->dispose = GST_DEBUG_FUNCPTR (gst_valve_dispose);
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gobject_class->set_property = GST_DEBUG_FUNCPTR (gst_valve_set_property);
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gobject_class->get_property = GST_DEBUG_FUNCPTR (gst_valve_get_property);
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gstbasetransform_class->transform_ip =
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GST_DEBUG_FUNCPTR (gst_valve_transform_ip);
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gstbasetransform_class->event =
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GST_DEBUG_FUNCPTR (gst_valve_event);
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gstbasetransform_class->src_event =
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GST_DEBUG_FUNCPTR (gst_valve_event);
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g_object_class_install_property (gobject_class, ARG_DROP,
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g_param_spec_boolean ("drop",
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"Drops all buffers if TRUE",
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"If this property if TRUE, the element will drop all buffers, if its FALSE, it will let them through",
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FALSE, G_PARAM_READWRITE));
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parent_class = g_type_class_peek_parent (klass);
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}
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static void
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gst_valve_init (GstValve *valve,
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GstValveClass *klass)
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{
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valve->drop = 0;
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gst_base_transform_set_passthrough ((GstBaseTransform *)valve, TRUE);
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}
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static void
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gst_valve_dispose (GObject *object)
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{
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GstValve *valve = NULL;
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valve = GST_VALVE (valve);
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G_OBJECT_CLASS (parent_class)->dispose (object);
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}
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static void
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gst_valve_set_property (GObject *object,
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guint prop_id, const GValue *value, GParamSpec *pspec)
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{
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GstValve *valve = GST_VALVE (object);
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switch (prop_id) {
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
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break;
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case ARG_DROP:
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GST_OBJECT_LOCK (object);
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valve->drop = g_value_get_boolean (value);
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GST_OBJECT_UNLOCK (object);
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break;
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}
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}
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static void
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gst_valve_get_property (GObject *object,
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guint prop_id, GValue *value, GParamSpec *pspec)
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{
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GstValve *valve = GST_VALVE (object);
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switch (prop_id) {
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
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break;
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case ARG_DROP:
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GST_OBJECT_LOCK (object);
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g_value_set_boolean (value, valve->drop);
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GST_OBJECT_UNLOCK (object);
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break;
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}
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}
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static GstFlowReturn
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gst_valve_transform_ip (GstBaseTransform *trans, GstBuffer *buf)
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{
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GstValve *valve = GST_VALVE (trans);
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GstFlowReturn ret = GST_FLOW_OK;
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GST_OBJECT_LOCK (GST_OBJECT (trans));
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if (valve->drop)
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ret = GST_BASE_TRANSFORM_FLOW_DROPPED;
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GST_OBJECT_UNLOCK (GST_OBJECT (trans));
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return ret;
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}
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static gboolean
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gst_valve_event (GstBaseTransform *trans, GstEvent *event)
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{
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GstValve *valve = GST_VALVE (trans);
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gboolean ret = TRUE;
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GST_OBJECT_LOCK (GST_OBJECT (trans));
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if (valve->drop)
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ret = FALSE;
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GST_OBJECT_UNLOCK (GST_OBJECT (trans));
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return ret;
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}
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gboolean
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gst_valve_plugin_init (GstPlugin *plugin)
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{
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return gst_element_register (plugin, "valve",
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GST_RANK_MARGINAL, GST_TYPE_VALVE);
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}
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GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
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GST_VERSION_MINOR,
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"valve",
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"Valve",
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gst_valve_plugin_init, VERSION, "LGPL", "Farsight", "http://farsight.sf.net")
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73
plugins/elements/gstvalve.h
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73
plugins/elements/gstvalve.h
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@ -0,0 +1,73 @@
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/*
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* Farsight Voice+Video library
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*
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* Copyright 2007 Collabora Ltd,
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* Copyright 2007 Nokia Corporation
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* @author: Olivier Crete <olivier.crete@collabora.co.uk>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*
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*/
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#ifndef __GST_VALVE_H__
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#define __GST_VALVE_H__
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#include <gst/gst.h>
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#include <gst/base/gstbasetransform.h>
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G_BEGIN_DECLS
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/* #define's don't like whitespacey bits */
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#define GST_TYPE_VALVE \
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(gst_valve_get_type())
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#define GST_VALVE(obj) \
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(G_TYPE_CHECK_INSTANCE_CAST((obj), \
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GST_TYPE_VALVE,GstValve))
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#define GST_VALVE_CLASS(klass) \
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(G_TYPE_CHECK_CLASS_CAST((klass), \
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GST_TYPE_VALVE,GstValveClass))
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#define GST_IS_VALVE(obj) \
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(G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_VALVE))
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#define GST_IS_VALVE_CLASS(obj) \
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(G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_VALVE))
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typedef struct _GstValve GstValve;
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typedef struct _GstValveClass GstValveClass;
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typedef struct _GstValvePrivate GstValvePrivate;
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struct _GstValve
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{
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GstBaseTransform parent;
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gboolean drop;
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/*< private > */
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gpointer _gst_reserved[GST_PADDING];
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};
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struct _GstValveClass
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{
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GstBaseTransformClass parent_class;
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/*< private > */
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gpointer _gst_reserved[GST_PADDING];
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};
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GType gst_valve_get_type (void);
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G_END_DECLS
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#endif /* __GST_VALVE_H__ */
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