gstreamer/plugins/elements/gstfakesrc.c
Erik Walthinsen c287566d0c Massive scheduling changes (again). Not entirely complete, but getting closer. Need to think about various scheduli...
Original commit message from CVS:
Massive scheduling changes (again).  Not entirely complete, but getting
closer.  Need to think about various scheduling plans that we might want
to produce, and figure out the rules for what is legal, and how to get
the results we need as far as the plan.
2000-12-20 09:39:43 +00:00

180 lines
4.5 KiB
C

/* Gnome-Streamer
* Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
*
* 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 <gstfakesrc.h>
GstElementDetails gst_fakesrc_details = {
"Fake Source",
"Source",
"Push empty (no data) buffers around",
VERSION,
"Erik Walthinsen <omega@cse.ogi.edu>",
"(C) 1999",
};
/* FakeSrc signals and args */
enum {
/* FILL ME */
LAST_SIGNAL
};
enum {
ARG_0,
ARG_NUM_SOURCES,
};
static void gst_fakesrc_class_init (GstFakeSrcClass *klass);
static void gst_fakesrc_init (GstFakeSrc *fakesrc);
static void gst_fakesrc_set_arg (GtkObject *object, GtkArg *arg, guint id);
static void gst_fakesrc_get_arg (GtkObject *object, GtkArg *arg, guint id);
static GstBuffer * gst_fakesrc_get (GstPad *pad);
static GstSrcClass *parent_class = NULL;
//static guint gst_fakesrc_signals[LAST_SIGNAL] = { 0 };
GtkType
gst_fakesrc_get_type (void)
{
static GtkType fakesrc_type = 0;
if (!fakesrc_type) {
static const GtkTypeInfo fakesrc_info = {
"GstFakeSrc",
sizeof(GstFakeSrc),
sizeof(GstFakeSrcClass),
(GtkClassInitFunc)gst_fakesrc_class_init,
(GtkObjectInitFunc)gst_fakesrc_init,
(GtkArgSetFunc)NULL,
(GtkArgGetFunc)NULL,
(GtkClassInitFunc)NULL,
};
fakesrc_type = gtk_type_unique (GST_TYPE_SRC, &fakesrc_info);
}
return fakesrc_type;
}
static void
gst_fakesrc_class_init (GstFakeSrcClass *klass)
{
GtkObjectClass *gtkobject_class;
GstSrcClass *gstsrc_class;
gtkobject_class = (GtkObjectClass*)klass;
gstsrc_class = (GstSrcClass*)klass;
parent_class = gtk_type_class (GST_TYPE_SRC);
gtk_object_add_arg_type ("GstFakeSrc::num_sources", GTK_TYPE_INT,
GTK_ARG_READWRITE, ARG_NUM_SOURCES);
gtkobject_class->set_arg = gst_fakesrc_set_arg;
gtkobject_class->get_arg = gst_fakesrc_get_arg;
}
static void gst_fakesrc_init(GstFakeSrc *fakesrc) {
GstPad *pad;
// set the default number of
fakesrc->numsrcpads = 1;
// create our first output pad
pad = gst_pad_new("src",GST_PAD_SRC);
gst_pad_set_get_function(pad,gst_fakesrc_get);
gst_element_add_pad(GST_ELEMENT(fakesrc),pad);
fakesrc->srcpads = g_slist_append(NULL,pad);
// we're ready right away, since we don't have any args...
// gst_element_set_state(GST_ELEMENT(fakesrc),GST_STATE_READY);
}
static void
gst_fakesrc_set_arg (GtkObject *object, GtkArg *arg, guint id)
{
GstFakeSrc *src;
gint new_numsrcs;
GstPad *pad;
/* it's not null if we got it, but it might not be ours */
src = GST_FAKESRC (object);
switch(id) {
case ARG_NUM_SOURCES:
new_numsrcs = GTK_VALUE_INT (*arg);
if (new_numsrcs > src->numsrcpads) {
while (src->numsrcpads != new_numsrcs) {
pad = gst_pad_new(g_strdup_printf("src%d",src->numsrcpads),GST_PAD_SRC);
gst_pad_set_get_function(pad,gst_fakesrc_get);
gst_element_add_pad(GST_ELEMENT(src),pad);
src->srcpads = g_slist_append(src->srcpads,pad);
src->numsrcpads;
}
}
break;
default:
break;
}
}
static void
gst_fakesrc_get_arg (GtkObject *object, GtkArg *arg, guint id)
{
GstFakeSrc *src;
/* it's not null if we got it, but it might not be ours */
g_return_if_fail (GST_IS_FAKESRC (object));
src = GST_FAKESRC (object);
switch (id) {
case ARG_NUM_SOURCES:
GTK_VALUE_INT (*arg) = src->numsrcpads;
break;
default:
arg->type = GTK_TYPE_INVALID;
break;
}
}
/**
* gst_fakesrc_get:
* @src: the faksesrc to get
*
* generate an empty buffer and push it to the next element.
*/
static GstBuffer *
gst_fakesrc_get(GstPad *pad)
{
GstFakeSrc *src;
GstBuffer *buf;
g_return_if_fail(pad != NULL);
src = GST_FAKESRC(gst_pad_get_parent(pad));
g_return_if_fail(GST_IS_FAKESRC(src));
g_print("(%s:%s)> ",GST_DEBUG_PAD_NAME(pad));
buf = gst_buffer_new();
return buf;
}