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 = GST_ELEMENT_DETAILS (
33 "Aggregator pipe fitting",
35 "N-to-1 pipe fitting",
36 "Wim Taymans <wim.taymans@chello.be>"
39 /* Aggregator signals and args */
54 GST_PAD_TEMPLATE_FACTORY (aggregator_src_factory,
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 = g_enum_register_static ("GstAggregatorSched", aggregator_sched);
75 return aggregator_sched_type;
78 #define AGGREGATOR_IS_LOOP_BASED(ag) ((ag)->sched != AGGREGATOR_CHAIN)
80 static void gst_aggregator_base_init (gpointer g_class);
81 static void gst_aggregator_class_init (GstAggregatorClass *klass);
82 static void gst_aggregator_init (GstAggregator *aggregator);
84 static GstPad* gst_aggregator_request_new_pad (GstElement *element, GstPadTemplate *temp, const
86 static void gst_aggregator_update_functions (GstAggregator *aggregator);
88 static void gst_aggregator_set_property (GObject *object, guint prop_id,
89 const GValue *value, GParamSpec *pspec);
90 static void gst_aggregator_get_property (GObject *object, guint prop_id,
91 GValue *value, GParamSpec *pspec);
93 static void gst_aggregator_chain (GstPad *pad, GstData *_data);
94 static void gst_aggregator_loop (GstElement *element);
96 static GstElementClass *parent_class = NULL;
97 /*static guint gst_aggregator_signals[LAST_SIGNAL] = { 0 };*/
100 gst_aggregator_get_type (void)
102 static GType aggregator_type = 0;
104 if (!aggregator_type) {
105 static const GTypeInfo aggregator_info = {
106 sizeof(GstAggregatorClass),
107 gst_aggregator_base_init,
109 (GClassInitFunc)gst_aggregator_class_init,
112 sizeof(GstAggregator),
114 (GInstanceInitFunc)gst_aggregator_init,
116 aggregator_type = g_type_register_static (GST_TYPE_ELEMENT, "GstAggregator", &aggregator_info, 0);
118 GST_DEBUG_CATEGORY_INIT (gst_aggregator_debug, "aggregator", 0, "aggregator element");
120 return aggregator_type;
124 gst_aggregator_base_init (gpointer g_class)
126 GstElementClass *gstelement_class = GST_ELEMENT_CLASS (g_class);
127 gst_element_class_add_pad_template (gstelement_class, GST_PAD_TEMPLATE_GET (aggregator_src_factory));
128 gst_element_class_set_details (gstelement_class, &gst_aggregator_details);
131 gst_aggregator_class_init (GstAggregatorClass *klass)
133 GObjectClass *gobject_class;
134 GstElementClass *gstelement_class;
136 gobject_class = (GObjectClass*) klass;
137 gstelement_class = (GstElementClass*) klass;
139 parent_class = g_type_class_ref (GST_TYPE_ELEMENT);
141 g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_NUM_PADS,
142 g_param_spec_int ("num_pads", "Num pads", "The number of source pads",
143 0, G_MAXINT, 0, G_PARAM_READABLE));
144 g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_SILENT,
145 g_param_spec_boolean ("silent", "Silent", "Don't produce messages",
146 FALSE, G_PARAM_READWRITE));
147 g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_SCHED,
148 g_param_spec_enum ("sched", "Scheduling", "The type of scheduling this element should use",
149 GST_TYPE_AGGREGATOR_SCHED, AGGREGATOR_CHAIN, G_PARAM_READWRITE));
150 g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_LAST_MESSAGE,
151 g_param_spec_string ("last_message", "Last message", "The current state of the element",
152 NULL, G_PARAM_READABLE));
154 gobject_class->set_property = GST_DEBUG_FUNCPTR(gst_aggregator_set_property);
155 gobject_class->get_property = GST_DEBUG_FUNCPTR(gst_aggregator_get_property);
157 gstelement_class->request_new_pad = GST_DEBUG_FUNCPTR(gst_aggregator_request_new_pad);
161 gst_aggregator_init (GstAggregator *aggregator)
163 aggregator->srcpad = gst_pad_new ("src", GST_PAD_SRC);
164 gst_element_add_pad (GST_ELEMENT (aggregator), aggregator->srcpad);
166 aggregator->numsinkpads = 0;
167 aggregator->sinkpads = NULL;
168 aggregator->silent = FALSE;
169 aggregator->sched = AGGREGATOR_LOOP;
171 gst_aggregator_update_functions (aggregator);
175 gst_aggregator_request_new_pad (GstElement *element, GstPadTemplate *templ, const gchar *unused)
179 GstAggregator *aggregator;
181 g_return_val_if_fail (GST_IS_AGGREGATOR (element), NULL);
183 if (templ->direction != GST_PAD_SINK) {
184 g_warning ("gstaggregator: request new pad that is not a sink pad\n");
188 aggregator = GST_AGGREGATOR (element);
190 name = g_strdup_printf ("sink%d",aggregator->numsinkpads);
192 sinkpad = gst_pad_new_from_template (templ, name);
195 if (!AGGREGATOR_IS_LOOP_BASED (aggregator)) {
196 gst_pad_set_chain_function (sinkpad, gst_aggregator_chain);
198 gst_element_add_pad (GST_ELEMENT (aggregator), sinkpad);
200 aggregator->sinkpads = g_list_prepend (aggregator->sinkpads, sinkpad);
201 aggregator->numsinkpads++;
207 gst_aggregator_update_functions (GstAggregator *aggregator)
211 if (AGGREGATOR_IS_LOOP_BASED (aggregator)) {
212 gst_element_set_loop_function (GST_ELEMENT (aggregator), GST_DEBUG_FUNCPTR (gst_aggregator_loop));
215 gst_element_set_loop_function (GST_ELEMENT (aggregator), NULL);
218 pads = aggregator->sinkpads;
220 GstPad *pad = GST_PAD (pads->data);
222 if (AGGREGATOR_IS_LOOP_BASED (aggregator)) {
223 gst_pad_set_get_function (pad, NULL);
226 gst_element_set_loop_function (GST_ELEMENT (aggregator), NULL);
228 pads = g_list_next (pads);
233 gst_aggregator_set_property (GObject *object, guint prop_id, const GValue *value, GParamSpec *pspec)
235 GstAggregator *aggregator;
237 /* it's not null if we got it, but it might not be ours */
238 g_return_if_fail (GST_IS_AGGREGATOR (object));
240 aggregator = GST_AGGREGATOR (object);
244 aggregator->silent = g_value_get_boolean (value);
247 aggregator->sched = g_value_get_enum (value);
248 gst_aggregator_update_functions (aggregator);
256 gst_aggregator_get_property (GObject *object, guint prop_id, GValue *value, GParamSpec *pspec)
258 GstAggregator *aggregator;
260 /* it's not null if we got it, but it might not be ours */
261 g_return_if_fail (GST_IS_AGGREGATOR (object));
263 aggregator = GST_AGGREGATOR (object);
267 g_value_set_int (value, aggregator->numsinkpads);
270 g_value_set_boolean (value, aggregator->silent);
273 g_value_set_enum (value, aggregator->sched);
275 case ARG_LAST_MESSAGE:
276 g_value_set_string (value, aggregator->last_message);
284 gst_aggregator_push (GstAggregator *aggregator, GstPad *pad, GstBuffer *buf, guchar *debug)
286 if (!aggregator->silent) {
287 g_free (aggregator->last_message);
289 aggregator->last_message = g_strdup_printf ("%10.10s ******* (%s:%s)a (%d bytes, %"
290 G_GUINT64_FORMAT ")",
291 debug, GST_DEBUG_PAD_NAME (pad), GST_BUFFER_SIZE (buf), GST_BUFFER_TIMESTAMP (buf));
293 g_object_notify (G_OBJECT (aggregator), "last_message");
296 gst_pad_push (aggregator->srcpad, GST_DATA (buf));
300 gst_aggregator_loop (GstElement *element)
302 GstAggregator *aggregator;
306 aggregator = GST_AGGREGATOR (element);
308 if (aggregator->sched == AGGREGATOR_LOOP) {
309 GList *pads = aggregator->sinkpads;
311 /* we'll loop over all pads and try to pull from all
314 GstPad *pad = GST_PAD (pads->data);
315 pads = g_list_next (pads);
317 /* we need to check is the pad is usable. IS_USABLE will check
318 * if the pad is linked, if it is enabled (the element is
319 * playing and the app didn't gst_pad_set_enabled (pad, FALSE))
320 * and that the peer pad is also enabled.
322 if (GST_PAD_IS_USABLE (pad)) {
323 buf = GST_BUFFER (gst_pad_pull (pad));
326 /* then push it forward */
327 gst_aggregator_push (aggregator, pad, buf, debug);
332 if (aggregator->sched == AGGREGATOR_LOOP_SELECT) {
335 debug = "loop_select";
337 pad = gst_pad_select (aggregator->sinkpads);
338 buf = GST_BUFFER (gst_pad_pull (pad));
340 gst_aggregator_push (aggregator, pad, buf, debug);
343 g_assert_not_reached ();
349 * gst_aggregator_chain:
350 * @pad: the pad to follow
351 * @buf: the buffer to pass
353 * Chain a buffer on a pad.
356 gst_aggregator_chain (GstPad *pad, GstData *_data)
358 GstBuffer *buf = GST_BUFFER (_data);
359 GstAggregator *aggregator;
361 g_return_if_fail (pad != NULL);
362 g_return_if_fail (GST_IS_PAD (pad));
363 g_return_if_fail (buf != NULL);
365 aggregator = GST_AGGREGATOR (gst_pad_get_parent (pad));
366 /* gst_trace_add_entry (NULL, 0, buf, "aggregator buffer");*/
368 gst_aggregator_push (aggregator, pad, buf, "chain");