gstreamer/gst/elements/gstidentity.c

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/* GStreamer
* Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
* 2000 Wim Taymans <wtay@chello.be>
*
* gstidentity.c:
*
* 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.
*/
#include <gstidentity.h>
GstElementDetails gst_identity_details = {
"Identity",
"Filter",
"Pass data without modification",
VERSION,
"Erik Walthinsen <omega@cse.ogi.edu>",
"(C) 1999",
};
/* Identity signals and args */
enum {
/* FILL ME */
LAST_SIGNAL
};
enum {
ARG_0,
ARG_LOOP_BASED,
ARG_SLEEP_TIME,
ARG_SILENT,
};
static void gst_identity_class_init (GstIdentityClass *klass);
static void gst_identity_init (GstIdentity *identity);
static void gst_identity_set_arg (GtkObject *object, GtkArg *arg, guint id);
static void gst_identity_get_arg (GtkObject *object, GtkArg *arg, guint id);
static void gst_identity_chain (GstPad *pad, GstBuffer *buf);
static GstElementClass *parent_class = NULL;
//static guint gst_identity_signals[LAST_SIGNAL] = { 0 };
GtkType
gst_identity_get_type (void)
{
static GtkType identity_type = 0;
if (!identity_type) {
static const GtkTypeInfo identity_info = {
"GstIdentity",
sizeof(GstIdentity),
sizeof(GstIdentityClass),
(GtkClassInitFunc)gst_identity_class_init,
(GtkObjectInitFunc)gst_identity_init,
(GtkArgSetFunc)gst_identity_set_arg,
(GtkArgGetFunc)gst_identity_get_arg,
(GtkClassInitFunc)NULL,
};
identity_type = gtk_type_unique (GST_TYPE_ELEMENT, &identity_info);
}
return identity_type;
}
static void
gst_identity_class_init (GstIdentityClass *klass)
{
GtkObjectClass *gtkobject_class;
gtkobject_class = (GtkObjectClass*)klass;
parent_class = gtk_type_class (GST_TYPE_ELEMENT);
gtk_object_add_arg_type ("GstIdentity::loop_based", GTK_TYPE_BOOL,
GTK_ARG_READWRITE, ARG_LOOP_BASED);
gtk_object_add_arg_type ("GstIdentity::sleep_time", GTK_TYPE_UINT,
GTK_ARG_READWRITE, ARG_SLEEP_TIME);
gtk_object_add_arg_type ("GstIdentity::silent", GTK_TYPE_BOOL,
GTK_ARG_READWRITE, ARG_SILENT);
gtkobject_class->set_arg = gst_identity_set_arg;
gtkobject_class->get_arg = gst_identity_get_arg;
}
static GstBufferPool*
gst_identity_get_bufferpool (GstPad *pad)
{
GstIdentity *identity;
identity = GST_IDENTITY (gst_pad_get_parent (pad));
return gst_pad_get_bufferpool (identity->srcpad);
}
static GstPadNegotiateReturn
gst_identity_negotiate_src (GstPad *pad, GstCaps **caps, gpointer *data)
{
GstIdentity *identity;
identity = GST_IDENTITY (gst_pad_get_parent (pad));
return gst_pad_negotiate_proxy (pad, identity->sinkpad, caps);
}
static GstPadNegotiateReturn
gst_identity_negotiate_sink (GstPad *pad, GstCaps **caps, gpointer *data)
{
GstIdentity *identity;
identity = GST_IDENTITY (gst_pad_get_parent (pad));
return gst_pad_negotiate_proxy (pad, identity->srcpad, caps);
}
static void
gst_identity_init (GstIdentity *identity)
{
identity->sinkpad = gst_pad_new ("sink", GST_PAD_SINK);
gst_element_add_pad (GST_ELEMENT (identity), identity->sinkpad);
gst_pad_set_chain_function (identity->sinkpad, gst_identity_chain);
gst_pad_set_bufferpool_function (identity->sinkpad, gst_identity_get_bufferpool);
gst_pad_set_negotiate_function (identity->sinkpad, gst_identity_negotiate_sink);
identity->srcpad = gst_pad_new ("src", GST_PAD_SRC);
gst_element_add_pad (GST_ELEMENT (identity), identity->srcpad);
gst_pad_set_negotiate_function (identity->srcpad, gst_identity_negotiate_src);
identity->loop_based = FALSE;
identity->sleep_time = 0;
identity->silent = FALSE;
}
static void
gst_identity_chain (GstPad *pad, GstBuffer *buf)
{
GstIdentity *identity;
g_return_if_fail (pad != NULL);
g_return_if_fail (GST_IS_PAD (pad));
g_return_if_fail (buf != NULL);
identity = GST_IDENTITY (gst_pad_get_parent (pad));
if (!identity->silent)
g_print("identity: ******* (%s:%s)i \n",GST_DEBUG_PAD_NAME(pad));
gst_pad_push (identity->srcpad, buf);
if (identity->sleep_time)
usleep (identity->sleep_time);
}
static void
gst_identity_loop (GstElement *element)
{
GstIdentity *identity;
GstBuffer *buf;
g_return_if_fail (element != NULL);
g_return_if_fail (GST_IS_IDENTITY (element));
identity = GST_IDENTITY (element);
do {
buf = gst_pad_pull (identity->sinkpad);
if (!identity->silent)
g_print("identity: ******* (%s:%s)i \n",GST_DEBUG_PAD_NAME(identity->sinkpad));
gst_pad_push (identity->srcpad, buf);
if (identity->sleep_time)
usleep (identity->sleep_time);
} while (!GST_ELEMENT_IS_COTHREAD_STOPPING(element));
}
static void
gst_identity_set_arg (GtkObject *object, GtkArg *arg, guint id)
{
GstIdentity *identity;
/* it's not null if we got it, but it might not be ours */
g_return_if_fail (GST_IS_IDENTITY (object));
identity = GST_IDENTITY (object);
switch(id) {
case ARG_LOOP_BASED:
identity->loop_based = GTK_VALUE_BOOL (*arg);
if (identity->loop_based) {
gst_element_set_loop_function (GST_ELEMENT (identity), gst_identity_loop);
gst_pad_set_chain_function (identity->sinkpad, NULL);
}
else {
gst_pad_set_chain_function (identity->sinkpad, gst_identity_chain);
gst_element_set_loop_function (GST_ELEMENT (identity), NULL);
}
break;
case ARG_SLEEP_TIME:
identity->sleep_time = GTK_VALUE_UINT (*arg);
break;
case ARG_SILENT:
identity->silent = GTK_VALUE_BOOL (*arg);
break;
default:
break;
}
}
static void gst_identity_get_arg(GtkObject *object,GtkArg *arg,guint id) {
GstIdentity *identity;
/* it's not null if we got it, but it might not be ours */
g_return_if_fail (GST_IS_IDENTITY (object));
identity = GST_IDENTITY (object);
switch (id) {
case ARG_LOOP_BASED:
GTK_VALUE_BOOL (*arg) = identity->loop_based;
break;
case ARG_SLEEP_TIME:
GTK_VALUE_UINT (*arg) = identity->sleep_time;
break;
case ARG_SILENT:
GTK_VALUE_BOOL (*arg) = identity->silent;
break;
default:
arg->type = GTK_TYPE_INVALID;
break;
}
}