mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-12-25 01:30:38 +00:00
51cbf22624
Original commit message from CVS: This is a megapatch with the following changes: - moved the gchar *name to GstObject, removed the ones in GstElement and GstPad. - moved the parent handling completely into GstObject. This cause *all* of the plugins to fail (except those that used gst_pad_get_parent) - rearanged the XML save handling. - GstObject now has a class function save/restore_thyself. - GstObject has a generic method gst_object_save_thyself, this makes it possible to fire a signal wehever a new object is loaded. This is needed so we can add XML save hooks. - GstXML API has changed slightly. You now have to create a GstXML object first before you can actually load something. This makes it possible to attach a signal to GstXML whenever an object is loaded. I'm not sure we will keep this interface. - GstObject can now print the path_string without knowing about the GstPad and GstElement types. - Added gst_bin_get_by_name_recurse_up to lookup an element in the current element hierarchy. - added XML namespaces to the saved pipelines the namespace is: http://gstreamer.net/gst-core/1.0/ namespaces are needed to distinguish user generated XML from the core XML. Note that the plugins still contain a macro GST_OBJECT_PARENT that will be replaced with gst_pad_get_parent shortly.
195 lines
5.1 KiB
C
195 lines
5.1 KiB
C
/* GStreamer
|
|
* Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
|
|
* 2000 Wim Taymans <wtay@chello.be>
|
|
*
|
|
* gsttypefind.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 "gst_private.h"
|
|
|
|
#include "gsttype.h"
|
|
|
|
#include "gsttypefind.h"
|
|
|
|
//#define GST_DEBUG_ENABLED
|
|
|
|
GstElementDetails gst_typefind_details = {
|
|
"TypeFind",
|
|
"TypeFind",
|
|
"Finds the media type",
|
|
VERSION,
|
|
"Erik Walthinsen <omega@cse.ogi.edu>"
|
|
"Wim Taymans <wim.taymans@chello.be>",
|
|
"(C) 1999",
|
|
};
|
|
|
|
|
|
/* TypeFind signals and args */
|
|
enum {
|
|
HAVE_TYPE,
|
|
LAST_SIGNAL
|
|
};
|
|
|
|
enum {
|
|
ARG_0,
|
|
ARG_CAPS,
|
|
};
|
|
|
|
|
|
static void gst_typefind_class_init (GstTypeFindClass *klass);
|
|
static void gst_typefind_init (GstTypeFind *typefind);
|
|
|
|
static void gst_typefind_set_arg (GtkObject *object, GtkArg *arg, guint id);
|
|
static void gst_typefind_get_arg (GtkObject *object, GtkArg *arg, guint id);
|
|
|
|
static void gst_typefind_chain (GstPad *pad, GstBuffer *buf);
|
|
|
|
static GstElementClass *parent_class = NULL;
|
|
static guint gst_typefind_signals[LAST_SIGNAL] = { 0 };
|
|
|
|
GtkType
|
|
gst_typefind_get_type(void) {
|
|
static GtkType typefind_type = 0;
|
|
|
|
if (!typefind_type) {
|
|
static const GtkTypeInfo typefind_info = {
|
|
"GstTypeFind",
|
|
sizeof(GstTypeFind),
|
|
sizeof(GstTypeFindClass),
|
|
(GtkClassInitFunc)gst_typefind_class_init,
|
|
(GtkObjectInitFunc)gst_typefind_init,
|
|
(GtkArgSetFunc)gst_typefind_set_arg,
|
|
(GtkArgGetFunc)gst_typefind_get_arg,
|
|
(GtkClassInitFunc)NULL,
|
|
};
|
|
typefind_type = gtk_type_unique(GST_TYPE_ELEMENT,&typefind_info);
|
|
}
|
|
return typefind_type;
|
|
}
|
|
|
|
static void
|
|
gst_typefind_class_init (GstTypeFindClass *klass)
|
|
{
|
|
GtkObjectClass *gtkobject_class;
|
|
|
|
gtkobject_class = (GtkObjectClass*)klass;
|
|
|
|
parent_class = gtk_type_class (GST_TYPE_ELEMENT);
|
|
|
|
gtk_object_add_arg_type("GstTypeFind::caps", GTK_TYPE_POINTER,
|
|
GTK_ARG_READABLE, ARG_CAPS);
|
|
|
|
gst_typefind_signals[HAVE_TYPE] =
|
|
gtk_signal_new ("have_type", GTK_RUN_LAST, gtkobject_class->type,
|
|
GTK_SIGNAL_OFFSET (GstTypeFindClass, have_type),
|
|
gtk_marshal_NONE__INT, GTK_TYPE_NONE, 1, GTK_TYPE_POINTER);
|
|
|
|
gtk_object_class_add_signals (gtkobject_class, gst_typefind_signals,
|
|
LAST_SIGNAL);
|
|
|
|
gtkobject_class->set_arg = gst_typefind_set_arg;
|
|
gtkobject_class->get_arg = gst_typefind_get_arg;
|
|
}
|
|
|
|
static void
|
|
gst_typefind_init (GstTypeFind *typefind)
|
|
{
|
|
typefind->sinkpad = gst_pad_new ("sink", GST_PAD_SINK);
|
|
gst_element_add_pad (GST_ELEMENT (typefind), typefind->sinkpad);
|
|
gst_pad_set_chain_function (typefind->sinkpad, gst_typefind_chain);
|
|
}
|
|
|
|
static void
|
|
gst_typefind_set_arg (GtkObject *object, GtkArg *arg, guint id)
|
|
{
|
|
GstTypeFind *typefind;
|
|
|
|
/* it's not null if we got it, but it might not be ours */
|
|
g_return_if_fail (GST_IS_TYPEFIND (object));
|
|
|
|
typefind = GST_TYPEFIND (object);
|
|
|
|
switch(id) {
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
|
|
static void
|
|
gst_typefind_get_arg (GtkObject *object, GtkArg *arg, guint id)
|
|
{
|
|
GstTypeFind *typefind;
|
|
|
|
/* it's not null if we got it, but it might not be ours */
|
|
g_return_if_fail (GST_IS_TYPEFIND (object));
|
|
|
|
typefind = GST_TYPEFIND (object);
|
|
|
|
switch(id) {
|
|
case ARG_CAPS:
|
|
GTK_VALUE_POINTER (*arg) = typefind->caps;
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
|
|
static void
|
|
gst_typefind_chain (GstPad *pad, GstBuffer *buf)
|
|
{
|
|
GstTypeFind *typefind;
|
|
GList *type_list;
|
|
GstType *type;
|
|
|
|
g_return_if_fail (pad != NULL);
|
|
g_return_if_fail (GST_IS_PAD (pad));
|
|
g_return_if_fail (buf != NULL);
|
|
|
|
typefind = GST_TYPEFIND (GST_OBJECT_PARENT (pad));
|
|
GST_DEBUG (0,"got buffer of %d bytes in '%s'\n",
|
|
GST_BUFFER_SIZE (buf), GST_OBJECT_NAME (typefind));
|
|
|
|
type_list = gst_type_get_list ();
|
|
|
|
while (type_list) {
|
|
GSList *funcs;
|
|
type = (GstType *)type_list->data;
|
|
|
|
funcs = type->typefindfuncs;
|
|
|
|
while (funcs) {
|
|
GstTypeFindFunc typefindfunc = (GstTypeFindFunc)funcs->data;
|
|
GstCaps *caps;
|
|
|
|
GST_DEBUG (0,"try type :%d \"%s\"\n", type->id, type->mime);
|
|
if (typefindfunc && (caps = typefindfunc (buf, type))) {
|
|
GST_DEBUG (0,"found type :%d \"%s\"\n", caps->id, type->mime);
|
|
typefind->caps = caps;
|
|
gtk_signal_emit (GTK_OBJECT (typefind), gst_typefind_signals[HAVE_TYPE],
|
|
typefind->caps);
|
|
goto end;
|
|
}
|
|
funcs = g_slist_next (funcs);
|
|
}
|
|
|
|
type_list = g_list_next (type_list);
|
|
}
|
|
end:
|
|
gst_buffer_unref (buf);
|
|
}
|