2 * Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
3 * 2000 Wim Taymans <wtay@chello.be>
7 * This library is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Library General Public
9 * License as published by the Free Software Foundation; either
10 * version 2 of the License, or (at your option) any later version.
12 * This library is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Library General Public License for more details.
17 * You should have received a copy of the GNU Library General Public
18 * License along with this library; if not, write to the
19 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
20 * Boston, MA 02111-1307, USA.
24 #include "gst_private.h"
28 #include "gsttypefind.h"
30 /* #define GST_DEBUG_ENABLED */
32 GstElementDetails gst_typefind_details = {
35 "Finds the media type",
37 "Erik Walthinsen <omega@cse.ogi.edu>"
38 "Wim Taymans <wim.taymans@chello.be>",
43 /* TypeFind signals and args */
55 static void gst_typefind_class_init (GstTypeFindClass *klass);
56 static void gst_typefind_init (GstTypeFind *typefind);
58 static void gst_typefind_set_property (GObject *object, guint prop_id,
59 const GValue *value, GParamSpec *pspec);
60 static void gst_typefind_get_property (GObject *object, guint prop_id,
61 GValue *value, GParamSpec *pspec);
63 static void gst_typefind_chain (GstPad *pad, GstBuffer *buf);
65 static GstElementClass *parent_class = NULL;
66 static guint gst_typefind_signals[LAST_SIGNAL] = { 0 };
69 gst_typefind_get_type (void)
71 static GType typefind_type = 0;
74 static const GTypeInfo typefind_info = {
75 sizeof(GstTypeFindClass),
78 (GClassInitFunc)gst_typefind_class_init,
83 (GInstanceInitFunc)gst_typefind_init,
86 typefind_type = g_type_register_static (GST_TYPE_ELEMENT, "GstTypeFind", &typefind_info, 0);
92 gst_typefind_class_init (GstTypeFindClass *klass)
94 GObjectClass *gobject_class;
96 gobject_class = (GObjectClass*)klass;
98 parent_class = g_type_class_ref (GST_TYPE_ELEMENT);
100 g_object_class_install_property(G_OBJECT_CLASS(klass), ARG_CAPS,
101 g_param_spec_pointer("caps", "Caps", "Found capabilities", G_PARAM_READABLE));
103 gst_typefind_signals[HAVE_TYPE] =
104 g_signal_new ("have_type", G_TYPE_FROM_CLASS(klass), G_SIGNAL_RUN_LAST,
105 G_STRUCT_OFFSET (GstTypeFindClass, have_type), NULL, NULL,
106 g_cclosure_marshal_VOID__POINTER, G_TYPE_NONE, 1,
109 gobject_class->set_property = GST_DEBUG_FUNCPTR (gst_typefind_set_property);
110 gobject_class->get_property = GST_DEBUG_FUNCPTR (gst_typefind_get_property);
114 gst_typefind_init (GstTypeFind *typefind)
116 typefind->sinkpad = gst_pad_new ("sink", GST_PAD_SINK);
117 gst_element_add_pad (GST_ELEMENT (typefind), typefind->sinkpad);
118 gst_pad_set_chain_function (typefind->sinkpad, gst_typefind_chain);
122 gst_typefind_set_property (GObject *object, guint prop_id, const GValue *value, GParamSpec *pspec)
124 GstTypeFind *typefind;
126 /* it's not null if we got it, but it might not be ours */
127 g_return_if_fail (GST_IS_TYPEFIND (object));
129 typefind = GST_TYPEFIND (object);
138 gst_typefind_get_property (GObject *object, guint prop_id, GValue *value, GParamSpec *pspec)
140 GstTypeFind *typefind;
142 /* it's not null if we got it, but it might not be ours */
143 g_return_if_fail (GST_IS_TYPEFIND (object));
145 typefind = GST_TYPEFIND (object);
149 g_value_set_pointer(value, typefind->caps);
157 gst_typefind_chain (GstPad *pad, GstBuffer *buf)
159 GstTypeFind *typefind;
163 g_return_if_fail (pad != NULL);
164 g_return_if_fail (GST_IS_PAD (pad));
165 g_return_if_fail (buf != NULL);
167 typefind = GST_TYPEFIND (GST_OBJECT_PARENT (pad));
168 GST_DEBUG (0,"got buffer of %d bytes in '%s'\n",
169 GST_BUFFER_SIZE (buf), GST_OBJECT_NAME (typefind));
171 type_list = gst_type_get_list ();
175 type = (GstType *)type_list->data;
177 factories = type->factories;
180 GstTypeFactory *factory = GST_TYPEFACTORY (factories->data);
181 GstTypeFindFunc typefindfunc = (GstTypeFindFunc)factory->typefindfunc;
184 GST_DEBUG (0,"try type :%d \"%s\"\n", type->id, type->mime);
185 if (typefindfunc && (caps = typefindfunc (buf, factory))) {
186 GST_DEBUG (0,"found type :%d \"%s\" \"%s\"\n", caps->id, type->mime,
187 gst_caps_get_name (caps));
188 typefind->caps = caps;
190 if (!gst_pad_try_set_caps (pad, caps)) {
191 g_warning ("typefind: found type but peer didn't accept it");
195 int oldstate = GST_STATE(typefind);
196 gst_object_ref (GST_OBJECT (typefind));
197 g_signal_emit (G_OBJECT (typefind), gst_typefind_signals[HAVE_TYPE], 0,
199 /* if (GST_STATE(typefind) != oldstate) {
200 GST_DEBUG(0, "state changed during signal, aborting\n");
201 gst_element_interrupt (GST_ELEMENT (typefind));
203 gst_object_unref (GST_OBJECT (typefind));
208 factories = g_slist_next (factories);
211 type_list = g_list_next (type_list);
214 gst_buffer_unref (buf);