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.
23 #include "gstaggregator.h"
26 GstElementDetails gst_aggregator_details = {
27 "Aggregator pipe fitting",
29 "N-to-1 pipe fitting",
31 "Wim Taymans <wim.taymans@chello.be>",
35 /* Aggregator signals and args */
49 GST_PADTEMPLATE_FACTORY (aggregator_src_factory,
56 #define GST_TYPE_AGGREGATOR_SCHED (gst_aggregator_sched_get_type())
58 gst_aggregator_sched_get_type (void)
60 static GType aggregator_sched_type = 0;
61 static GEnumValue aggregator_sched[] = {
62 { AGGREGATOR_LOOP, "1", "Loop Based"},
63 { AGGREGATOR_LOOP_PEEK, "2", "Loop Based Peek"},
64 { AGGREGATOR_LOOP_SELECT, "3", "Loop Based Select"},
65 { AGGREGATOR_CHAIN, "4", "Chain Based"},
68 if (!aggregator_sched_type) {
69 aggregator_sched_type = g_enum_register_static ("GstAggregatorSched", aggregator_sched);
71 return aggregator_sched_type;
74 #define AGGREGATOR_IS_LOOP_BASED(ag) ((ag)->sched != AGGREGATOR_CHAIN)
76 static void gst_aggregator_class_init (GstAggregatorClass *klass);
77 static void gst_aggregator_init (GstAggregator *aggregator);
79 static GstPad* gst_aggregator_request_new_pad (GstElement *element, GstPadTemplate *temp);
81 static void gst_aggregator_set_property (GObject *object, guint prop_id,
82 const GValue *value, GParamSpec *pspec);
83 static void gst_aggregator_get_property (GObject *object, guint prop_id,
84 GValue *value, GParamSpec *pspec);
86 static void gst_aggregator_chain (GstPad *pad, GstBuffer *buf);
87 static void gst_aggregator_loop (GstElement *element);
89 static GstElementClass *parent_class = NULL;
90 //static guint gst_aggregator_signals[LAST_SIGNAL] = { 0 };
93 gst_aggregator_get_type (void)
95 static GType aggregator_type = 0;
97 if (!aggregator_type) {
98 static const GTypeInfo aggregator_info = {
99 sizeof(GstAggregatorClass),
102 (GClassInitFunc)gst_aggregator_class_init,
105 sizeof(GstAggregator),
107 (GInstanceInitFunc)gst_aggregator_init,
109 aggregator_type = g_type_register_static (GST_TYPE_ELEMENT, "GstAggregator", &aggregator_info, 0);
111 return aggregator_type;
115 gst_aggregator_class_init (GstAggregatorClass *klass)
117 GObjectClass *gobject_class;
118 GstElementClass *gstelement_class;
120 gobject_class = (GObjectClass*) klass;
121 gstelement_class = (GstElementClass*) klass;
123 parent_class = g_type_class_ref (GST_TYPE_ELEMENT);
125 g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_NUM_PADS,
126 g_param_spec_int ("num_pads", "num_pads", "num_pads",
127 0, G_MAXINT, 0, G_PARAM_READABLE));
128 g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_SILENT,
129 g_param_spec_boolean ("silent", "silent", "silent",
130 FALSE, G_PARAM_READWRITE));
131 g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_SCHED,
132 g_param_spec_enum ("sched", "sched", "sched",
133 GST_TYPE_AGGREGATOR_SCHED, AGGREGATOR_CHAIN, G_PARAM_READWRITE));
135 gobject_class->set_property = GST_DEBUG_FUNCPTR(gst_aggregator_set_property);
136 gobject_class->get_property = GST_DEBUG_FUNCPTR(gst_aggregator_get_property);
138 gstelement_class->request_new_pad = GST_DEBUG_FUNCPTR(gst_aggregator_request_new_pad);
142 gst_aggregator_init (GstAggregator *aggregator)
144 aggregator->srcpad = gst_pad_new ("src", GST_PAD_SRC);
145 gst_element_add_pad (GST_ELEMENT (aggregator), aggregator->srcpad);
147 aggregator->numsinkpads = 0;
148 aggregator->sinkpads = NULL;
149 aggregator->silent = FALSE;
153 gst_aggregator_request_new_pad (GstElement *element, GstPadTemplate *templ)
157 GstAggregator *aggregator;
159 g_return_val_if_fail (GST_IS_AGGREGATOR (element), NULL);
161 if (templ->direction != GST_PAD_SINK) {
162 g_warning ("gstaggregator: request new pad that is not a SRC pad\n");
166 aggregator = GST_AGGREGATOR (element);
168 name = g_strdup_printf ("sink%d",aggregator->numsinkpads);
170 sinkpad = gst_pad_new_from_template (templ, name);
171 gst_pad_set_chain_function (sinkpad, gst_aggregator_chain);
172 gst_element_add_pad (GST_ELEMENT (aggregator), sinkpad);
174 aggregator->sinkpads = g_list_prepend (aggregator->sinkpads, sinkpad);
175 aggregator->numsinkpads++;
181 gst_aggregator_update_functions (GstAggregator *aggregator)
185 if (AGGREGATOR_IS_LOOP_BASED (aggregator)) {
186 gst_element_set_loop_function (GST_ELEMENT (aggregator), GST_DEBUG_FUNCPTR (gst_aggregator_loop));
189 gst_element_set_loop_function (GST_ELEMENT (aggregator), NULL);
192 pads = aggregator->sinkpads;
194 GstPad *pad = GST_PAD (pads->data);
196 if (AGGREGATOR_IS_LOOP_BASED (aggregator)) {
197 gst_pad_set_get_function (pad, NULL);
200 gst_element_set_loop_function (GST_ELEMENT (aggregator), NULL);
202 pads = g_list_next (pads);
207 gst_aggregator_set_property (GObject *object, guint prop_id, const GValue *value, GParamSpec *pspec)
209 GstAggregator *aggregator;
211 /* it's not null if we got it, but it might not be ours */
212 g_return_if_fail (GST_IS_AGGREGATOR (object));
214 aggregator = GST_AGGREGATOR (object);
218 aggregator->silent = g_value_get_boolean (value);
221 aggregator->sched = g_value_get_enum (value);
222 gst_aggregator_update_functions (aggregator);
230 gst_aggregator_get_property (GObject *object, guint prop_id, GValue *value, GParamSpec *pspec)
232 GstAggregator *aggregator;
234 /* it's not null if we got it, but it might not be ours */
235 g_return_if_fail (GST_IS_AGGREGATOR (object));
237 aggregator = GST_AGGREGATOR (object);
241 g_value_set_int (value, aggregator->numsinkpads);
244 g_value_set_boolean (value, aggregator->silent);
247 g_value_set_enum (value, aggregator->sched);
255 gst_aggregator_push (GstAggregator *aggregator, GstPad *pad, GstBuffer *buf, guchar *debug)
257 if (!aggregator->silent)
258 g_print("aggregator: %10.10s ******* (%s:%s)a (%d bytes, %llu) \n",
259 debug, GST_DEBUG_PAD_NAME (pad), GST_BUFFER_SIZE (buf), GST_BUFFER_TIMESTAMP (buf));
261 gst_pad_push (aggregator->srcpad, buf);
265 gst_aggregator_loop (GstElement *element)
267 GstAggregator *aggregator;
271 aggregator = GST_AGGREGATOR (element);
274 if (aggregator->sched == AGGREGATOR_LOOP ||
275 aggregator->sched == AGGREGATOR_LOOP_PEEK) {
276 GList *pads = aggregator->sinkpads;
279 GstPad *pad = GST_PAD (pads->data);
280 pads = g_list_next (pads);
282 if (aggregator->sched == AGGREGATOR_LOOP_PEEK) {
283 buf = gst_pad_peek (pad);
287 g_assert (buf == gst_pad_pull (pad));
291 buf = gst_pad_pull (pad);
294 gst_aggregator_push (aggregator, pad, buf, debug);
298 if (aggregator->sched == AGGREGATOR_LOOP_SELECT) {
301 debug = "loop_select";
303 pad = gst_pad_select (aggregator->sinkpads);
304 buf = gst_pad_pull (pad);
306 gst_aggregator_push (aggregator, pad, buf, debug);
309 g_assert_not_reached ();
312 } while (!GST_ELEMENT_IS_COTHREAD_STOPPING (element));
316 * gst_aggregator_chain:
317 * @pad: the pad to follow
318 * @buf: the buffer to pass
320 * Chain a buffer on a pad.
323 gst_aggregator_chain (GstPad *pad, GstBuffer *buf)
325 GstAggregator *aggregator;
327 g_return_if_fail (pad != NULL);
328 g_return_if_fail (GST_IS_PAD (pad));
329 g_return_if_fail (buf != NULL);
331 aggregator = GST_AGGREGATOR (gst_pad_get_parent (pad));
332 // gst_trace_add_entry (NULL, 0, buf, "aggregator buffer");
334 gst_aggregator_push (aggregator, pad, buf, "chain");
338 gst_aggregator_factory_init (GstElementFactory *factory)
340 gst_elementfactory_add_padtemplate (factory, GST_PADTEMPLATE_GET (aggregator_src_factory));