2 * Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
3 * 2000 Wim Taymans <wim.taymans@chello.be>
5 * gstaggregator.c: Aggregator element, N in 1 out
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.
27 #include "gstaggregator.h"
29 GST_DEBUG_CATEGORY_STATIC (gst_aggregator_debug);
30 #define GST_CAT_DEFAULT gst_aggregator_debug
32 GstElementDetails gst_aggregator_details =
33 GST_ELEMENT_DETAILS ("Aggregator pipe fitting",
35 "N-to-1 pipe fitting",
36 "Wim Taymans <wim.taymans@chello.be>");
38 /* Aggregator signals and args */
55 GstStaticPadTemplate aggregator_src_template =
56 GST_STATIC_PAD_TEMPLATE ("sink%d",
61 #define GST_TYPE_AGGREGATOR_SCHED (gst_aggregator_sched_get_type())
63 gst_aggregator_sched_get_type (void)
65 static GType aggregator_sched_type = 0;
66 static GEnumValue aggregator_sched[] = {
67 {AGGREGATOR_LOOP, "1", "Loop Based"},
68 {AGGREGATOR_LOOP_SELECT, "3", "Loop Based Select"},
69 {AGGREGATOR_CHAIN, "4", "Chain Based"},
72 if (!aggregator_sched_type) {
73 aggregator_sched_type =
74 g_enum_register_static ("GstAggregatorSched", aggregator_sched);
76 return aggregator_sched_type;
79 #define AGGREGATOR_IS_LOOP_BASED(ag) ((ag)->sched != AGGREGATOR_CHAIN)
81 static GstPad *gst_aggregator_request_new_pad (GstElement * element,
82 GstPadTemplate * temp, const gchar * unused);
83 static void gst_aggregator_update_functions (GstAggregator * aggregator);
85 static void gst_aggregator_set_property (GObject * object, guint prop_id,
86 const GValue * value, GParamSpec * pspec);
87 static void gst_aggregator_get_property (GObject * object, guint prop_id,
88 GValue * value, GParamSpec * pspec);
90 static void gst_aggregator_chain (GstPad * pad, GstData * _data);
91 static void gst_aggregator_loop (GstElement * element);
93 #define _do_init(bla) \
94 GST_DEBUG_CATEGORY_INIT (gst_aggregator_debug, "aggregator", 0, "aggregator element");
96 GST_BOILERPLATE_FULL (GstAggregator, gst_aggregator, GstElement,
97 GST_TYPE_ELEMENT, _do_init);
100 gst_aggregator_base_init (gpointer g_class)
102 GstElementClass *gstelement_class = GST_ELEMENT_CLASS (g_class);
104 gst_element_class_add_pad_template (gstelement_class,
105 gst_static_pad_template_get (&aggregator_src_template));
106 gst_element_class_set_details (gstelement_class, &gst_aggregator_details);
109 gst_aggregator_class_init (GstAggregatorClass * klass)
111 GObjectClass *gobject_class;
112 GstElementClass *gstelement_class;
114 gobject_class = (GObjectClass *) klass;
115 gstelement_class = (GstElementClass *) klass;
118 g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_NUM_PADS,
119 g_param_spec_int ("num_pads", "Num pads", "The number of source pads",
120 0, G_MAXINT, 0, G_PARAM_READABLE));
121 g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_SILENT,
122 g_param_spec_boolean ("silent", "Silent", "Don't produce messages",
123 FALSE, G_PARAM_READWRITE));
124 g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_SCHED,
125 g_param_spec_enum ("sched", "Scheduling",
126 "The type of scheduling this element should use",
127 GST_TYPE_AGGREGATOR_SCHED, AGGREGATOR_CHAIN, G_PARAM_READWRITE));
128 g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_LAST_MESSAGE,
129 g_param_spec_string ("last_message", "Last message",
130 "The current state of the element", NULL, G_PARAM_READABLE));
132 gobject_class->set_property = GST_DEBUG_FUNCPTR (gst_aggregator_set_property);
133 gobject_class->get_property = GST_DEBUG_FUNCPTR (gst_aggregator_get_property);
135 gstelement_class->request_new_pad =
136 GST_DEBUG_FUNCPTR (gst_aggregator_request_new_pad);
140 gst_aggregator_init (GstAggregator * aggregator)
142 aggregator->srcpad = gst_pad_new ("src", GST_PAD_SRC);
143 gst_pad_set_getcaps_function (aggregator->srcpad, gst_pad_proxy_getcaps);
144 gst_element_add_pad (GST_ELEMENT (aggregator), aggregator->srcpad);
146 aggregator->numsinkpads = 0;
147 aggregator->sinkpads = NULL;
148 aggregator->silent = FALSE;
149 aggregator->sched = AGGREGATOR_LOOP;
151 gst_aggregator_update_functions (aggregator);
155 gst_aggregator_request_new_pad (GstElement * element, GstPadTemplate * templ,
156 const gchar * unused)
160 GstAggregator *aggregator;
162 g_return_val_if_fail (GST_IS_AGGREGATOR (element), NULL);
164 if (templ->direction != GST_PAD_SINK) {
165 g_warning ("gstaggregator: request new pad that is not a sink pad\n");
169 aggregator = GST_AGGREGATOR (element);
171 name = g_strdup_printf ("sink%d", aggregator->numsinkpads);
173 sinkpad = gst_pad_new_from_template (templ, name);
176 if (!AGGREGATOR_IS_LOOP_BASED (aggregator)) {
177 gst_pad_set_chain_function (sinkpad, gst_aggregator_chain);
179 gst_pad_set_getcaps_function (sinkpad, gst_pad_proxy_getcaps);
180 gst_element_add_pad (GST_ELEMENT (aggregator), sinkpad);
182 aggregator->sinkpads = g_list_prepend (aggregator->sinkpads, sinkpad);
183 aggregator->numsinkpads++;
189 gst_aggregator_update_functions (GstAggregator * aggregator)
193 if (AGGREGATOR_IS_LOOP_BASED (aggregator)) {
194 gst_element_set_loop_function (GST_ELEMENT (aggregator),
195 GST_DEBUG_FUNCPTR (gst_aggregator_loop));
197 gst_element_set_loop_function (GST_ELEMENT (aggregator), NULL);
200 pads = aggregator->sinkpads;
202 GstPad *pad = GST_PAD (pads->data);
204 if (AGGREGATOR_IS_LOOP_BASED (aggregator)) {
205 gst_pad_set_get_function (pad, NULL);
207 gst_element_set_loop_function (GST_ELEMENT (aggregator), NULL);
209 pads = g_list_next (pads);
214 gst_aggregator_set_property (GObject * object, guint prop_id,
215 const GValue * value, GParamSpec * pspec)
217 GstAggregator *aggregator;
219 /* it's not null if we got it, but it might not be ours */
220 g_return_if_fail (GST_IS_AGGREGATOR (object));
222 aggregator = GST_AGGREGATOR (object);
226 aggregator->silent = g_value_get_boolean (value);
229 aggregator->sched = g_value_get_enum (value);
230 gst_aggregator_update_functions (aggregator);
238 gst_aggregator_get_property (GObject * object, guint prop_id, GValue * value,
241 GstAggregator *aggregator;
243 /* it's not null if we got it, but it might not be ours */
244 g_return_if_fail (GST_IS_AGGREGATOR (object));
246 aggregator = GST_AGGREGATOR (object);
250 g_value_set_int (value, aggregator->numsinkpads);
253 g_value_set_boolean (value, aggregator->silent);
256 g_value_set_enum (value, aggregator->sched);
258 case ARG_LAST_MESSAGE:
259 g_value_set_string (value, aggregator->last_message);
267 gst_aggregator_push (GstAggregator * aggregator, GstPad * pad, GstBuffer * buf,
270 if (!aggregator->silent) {
271 g_free (aggregator->last_message);
273 aggregator->last_message =
274 g_strdup_printf ("%10.10s ******* (%s:%s)a (%d bytes, %"
275 G_GUINT64_FORMAT ")", debug, GST_DEBUG_PAD_NAME (pad),
276 GST_BUFFER_SIZE (buf), GST_BUFFER_TIMESTAMP (buf));
278 g_object_notify (G_OBJECT (aggregator), "last_message");
281 gst_pad_push (aggregator->srcpad, GST_DATA (buf));
285 gst_aggregator_loop (GstElement * element)
287 GstAggregator *aggregator;
291 aggregator = GST_AGGREGATOR (element);
293 if (aggregator->sched == AGGREGATOR_LOOP) {
294 GList *pads = aggregator->sinkpads;
296 /* we'll loop over all pads and try to pull from all
299 GstPad *pad = GST_PAD (pads->data);
301 pads = g_list_next (pads);
303 /* we need to check is the pad is usable. IS_USABLE will check
304 * if the pad is linked, if it is enabled (the element is
305 * playing and the app didn't gst_pad_set_enabled (pad, FALSE))
306 * and that the peer pad is also enabled.
308 if (GST_PAD_IS_USABLE (pad)) {
309 buf = GST_BUFFER (gst_pad_pull (pad));
312 /* then push it forward */
313 gst_aggregator_push (aggregator, pad, buf, debug);
317 if (aggregator->sched == AGGREGATOR_LOOP_SELECT) {
320 debug = "loop_select";
322 pad = gst_pad_selectv (aggregator->sinkpads);
323 buf = GST_BUFFER (gst_pad_pull (pad));
325 gst_aggregator_push (aggregator, pad, buf, debug);
327 g_assert_not_reached ();
333 * gst_aggregator_chain:
334 * @pad: the pad to follow
335 * @buf: the buffer to pass
337 * Chain a buffer on a pad.
340 gst_aggregator_chain (GstPad * pad, GstData * _data)
342 GstBuffer *buf = GST_BUFFER (_data);
343 GstAggregator *aggregator;
345 g_return_if_fail (pad != NULL);
346 g_return_if_fail (GST_IS_PAD (pad));
347 g_return_if_fail (buf != NULL);
349 aggregator = GST_AGGREGATOR (gst_pad_get_parent (pad));
350 /* gst_trace_add_entry (NULL, 0, buf, "aggregator buffer");*/
352 gst_aggregator_push (aggregator, pad, buf, "chain");