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, const GValue *value, GParamSpec *pspec);
59 static void gst_typefind_get_property (GObject *object, guint prop_id, GValue *value, GParamSpec *pspec);
61 static void gst_typefind_chain (GstPad *pad, GstBuffer *buf);
63 static GstElementClass *parent_class = NULL;
64 static guint gst_typefind_signals[LAST_SIGNAL] = { 0 };
67 gst_typefind_get_type (void)
69 static GType typefind_type = 0;
72 static const GTypeInfo typefind_info = {
73 sizeof(GstTypeFindClass),
76 (GClassInitFunc)gst_typefind_class_init,
81 (GInstanceInitFunc)gst_typefind_init,
83 typefind_type = g_type_register_static (GST_TYPE_ELEMENT, "GstTypeFind", &typefind_info, 0);
89 gst_typefind_class_init (GstTypeFindClass *klass)
91 GObjectClass *gobject_class;
93 gobject_class = (GObjectClass*)klass;
95 parent_class = g_type_class_ref (GST_TYPE_ELEMENT);
97 g_object_class_install_property(G_OBJECT_CLASS(klass), ARG_CAPS,
98 g_param_spec_pointer("caps", "Caps", "Found capabilities", G_PARAM_READABLE));
100 gst_typefind_signals[HAVE_TYPE] =
101 g_signal_new ("have_type", G_TYPE_FROM_CLASS(klass), G_SIGNAL_RUN_LAST,
102 G_STRUCT_OFFSET (GstTypeFindClass, have_type), NULL, NULL,
103 g_cclosure_marshal_VOID__POINTER, G_TYPE_NONE, 1,
106 gobject_class->set_property = gst_typefind_set_property;
107 gobject_class->get_property = gst_typefind_get_property;
111 gst_typefind_init (GstTypeFind *typefind)
113 typefind->sinkpad = gst_pad_new ("sink", GST_PAD_SINK);
114 gst_element_add_pad (GST_ELEMENT (typefind), typefind->sinkpad);
115 gst_pad_set_chain_function (typefind->sinkpad, gst_typefind_chain);
119 gst_typefind_set_property (GObject *object, guint prop_id, const GValue *value, GParamSpec *pspec)
121 GstTypeFind *typefind;
123 /* it's not null if we got it, but it might not be ours */
124 g_return_if_fail (GST_IS_TYPEFIND (object));
126 typefind = GST_TYPEFIND (object);
135 gst_typefind_get_property (GObject *object, guint prop_id, GValue *value, GParamSpec *pspec)
137 GstTypeFind *typefind;
139 /* it's not null if we got it, but it might not be ours */
140 g_return_if_fail (GST_IS_TYPEFIND (object));
142 typefind = GST_TYPEFIND (object);
146 g_value_set_pointer(value, typefind->caps);
154 gst_typefind_chain (GstPad *pad, GstBuffer *buf)
156 GstTypeFind *typefind;
160 g_return_if_fail (pad != NULL);
161 g_return_if_fail (GST_IS_PAD (pad));
162 g_return_if_fail (buf != NULL);
164 typefind = GST_TYPEFIND (GST_OBJECT_PARENT (pad));
165 GST_DEBUG (0,"got buffer of %d bytes in '%s'\n",
166 GST_BUFFER_SIZE (buf), GST_OBJECT_NAME (typefind));
168 type_list = gst_type_get_list ();
172 type = (GstType *)type_list->data;
174 funcs = type->typefindfuncs;
177 GstTypeFindFunc typefindfunc = (GstTypeFindFunc)funcs->data;
180 GST_DEBUG (0,"try type :%d \"%s\"\n", type->id, type->mime);
181 if (typefindfunc && (caps = typefindfunc (buf, type))) {
182 GST_DEBUG (0,"found type :%d \"%s\" \"%s\"\n", caps->id, type->mime,
183 gst_caps_get_name (caps));
184 typefind->caps = caps;
186 gst_pad_set_caps (pad, caps);
188 { /* FIXME: this should all be in an _emit() wrapper eventually */
189 int oldstate = GST_STATE(typefind);
190 gst_object_ref (GST_OBJECT (typefind));
191 g_signal_emit (G_OBJECT (typefind), gst_typefind_signals[HAVE_TYPE], 0,
193 if (GST_STATE(typefind) != oldstate) {
194 gst_object_unref (GST_OBJECT (typefind));
195 GST_DEBUG(0, "state changed during signal, aborting\n");
196 cothread_switch(cothread_current_main());
198 gst_object_unref (GST_OBJECT (typefind));
203 funcs = g_slist_next (funcs);
206 type_list = g_list_next (type_list);
209 gst_buffer_unref (buf);