2 * GStreamer Funnel element
4 * Copyright 2007 Collabora Ltd.
5 * @author: Olivier Crete <olivier.crete@collabora.co.uk>
6 * Copyright 2007 Nokia Corp.
8 * gstfunnel.c: Simple Funnel element
10 * This library is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU Lesser General Public
12 * License as published by the Free Software Foundation; either
13 * version 2.1 of the License, or (at your option) any later version.
15 * This library is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 * Lesser General Public License for more details.
20 * You should have received a copy of the GNU Lesser General Public
21 * License along with this library; if not, write to the Free Software
22 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
26 * SECTION:element-funnel
28 * Takes packets from various input sinks into one output source.
30 * funnel always outputs a single, open ended segment from
31 * 0 with in %GST_FORMAT_TIME and outputs the buffers of the
32 * different sinkpads with timestamps that are set to the
33 * running time for that stream. funnel does not synchronize
34 * the different input streams but simply forwards all buffers
35 * immediately when they arrive.
43 #include "gstfunnel.h"
45 GST_DEBUG_CATEGORY_STATIC (gst_funnel_debug);
46 #define GST_CAT_DEFAULT gst_funnel_debug
48 GType gst_funnel_pad_get_type (void);
49 #define GST_TYPE_FUNNEL_PAD \
50 (gst_funnel_pad_get_type())
51 #define GST_FUNNEL_PAD(obj) \
52 (G_TYPE_CHECK_INSTANCE_CAST ((obj), GST_TYPE_FUNNEL_PAD, GstFunnelPad))
53 #define GST_FUNNEL_PAD_CLASS(klass) \
54 (G_TYPE_CHECK_CLASS_CAST ((klass), GST_TYPE_FUNNEL_PAD, GstFunnelPadClass))
55 #define GST_IS_FUNNEL_PAD(obj) \
56 (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GST_TYPE_FUNNEL_PAD))
57 #define GST_IS_FUNNEL_PAD_CLASS(klass) \
58 (G_TYPE_CHECK_CLASS_TYPE ((klass), GST_TYPE_FUNNEL_PAD))
59 #define GST_FUNNEL_PAD_CAST(obj) \
60 ((GstFunnelPad *)(obj))
62 typedef struct _GstFunnelPad GstFunnelPad;
63 typedef struct _GstFunnelPadClass GstFunnelPadClass;
72 struct _GstFunnelPadClass
77 G_DEFINE_TYPE (GstFunnelPad, gst_funnel_pad, GST_TYPE_PAD);
80 gst_funnel_pad_class_init (GstFunnelPadClass * klass)
85 gst_funnel_pad_reset (GstFunnelPad * pad)
87 gst_segment_init (&pad->segment, GST_FORMAT_UNDEFINED);
91 gst_funnel_pad_init (GstFunnelPad * pad)
93 gst_funnel_pad_reset (pad);
96 static GstStaticPadTemplate funnel_sink_template =
97 GST_STATIC_PAD_TEMPLATE ("sink_%u",
100 GST_STATIC_CAPS_ANY);
102 static GstStaticPadTemplate funnel_src_template =
103 GST_STATIC_PAD_TEMPLATE ("src",
106 GST_STATIC_CAPS_ANY);
109 GST_DEBUG_CATEGORY_INIT (gst_funnel_debug, "funnel", 0, "funnel element");
110 #define gst_funnel_parent_class parent_class
111 G_DEFINE_TYPE_WITH_CODE (GstFunnel, gst_funnel, GST_TYPE_ELEMENT, _do_init);
113 static GstStateChangeReturn gst_funnel_change_state (GstElement * element,
114 GstStateChange transition);
115 static GstPad *gst_funnel_request_new_pad (GstElement * element,
116 GstPadTemplate * templ, const gchar * name, const GstCaps * caps);
117 static void gst_funnel_release_pad (GstElement * element, GstPad * pad);
119 static GstFlowReturn gst_funnel_sink_chain (GstPad * pad, GstObject * parent,
121 static gboolean gst_funnel_sink_event (GstPad * pad, GstObject * parent,
123 static gboolean gst_funnel_sink_query (GstPad * pad, GstObject * parent,
126 static gboolean gst_funnel_src_event (GstPad * pad, GstObject * parent,
130 gst_funnel_dispose (GObject * object)
135 for (item = GST_ELEMENT_PADS (object); item; item = g_list_next (item)) {
136 GstPad *pad = GST_PAD (item->data);
138 if (GST_PAD_IS_SINK (pad)) {
139 gst_element_release_request_pad (GST_ELEMENT (object), pad);
144 G_OBJECT_CLASS (parent_class)->dispose (object);
148 gst_funnel_class_init (GstFunnelClass * klass)
150 GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
151 GstElementClass *gstelement_class = GST_ELEMENT_CLASS (klass);
153 gobject_class->dispose = GST_DEBUG_FUNCPTR (gst_funnel_dispose);
155 gst_element_class_set_details_simple (gstelement_class,
156 "Funnel pipe fitting", "Generic", "N-to-1 pipe fitting",
157 "Olivier Crete <olivier.crete@collabora.co.uk>");
159 gst_element_class_add_pad_template (gstelement_class,
160 gst_static_pad_template_get (&funnel_sink_template));
161 gst_element_class_add_pad_template (gstelement_class,
162 gst_static_pad_template_get (&funnel_src_template));
164 gstelement_class->request_new_pad =
165 GST_DEBUG_FUNCPTR (gst_funnel_request_new_pad);
166 gstelement_class->release_pad = GST_DEBUG_FUNCPTR (gst_funnel_release_pad);
167 gstelement_class->change_state = GST_DEBUG_FUNCPTR (gst_funnel_change_state);
171 gst_funnel_init (GstFunnel * funnel)
173 funnel->srcpad = gst_pad_new_from_static_template (&funnel_src_template,
175 gst_pad_set_event_function (funnel->srcpad, gst_funnel_src_event);
176 gst_pad_use_fixed_caps (funnel->srcpad);
177 gst_element_add_pad (GST_ELEMENT (funnel), funnel->srcpad);
181 gst_funnel_request_new_pad (GstElement * element, GstPadTemplate * templ,
182 const gchar * name, const GstCaps * caps)
186 GST_DEBUG_OBJECT (element, "requesting pad");
188 sinkpad = GST_PAD_CAST (g_object_new (GST_TYPE_FUNNEL_PAD,
189 "name", name, "direction", templ->direction, "template", templ,
192 gst_pad_set_chain_function (sinkpad,
193 GST_DEBUG_FUNCPTR (gst_funnel_sink_chain));
194 gst_pad_set_event_function (sinkpad,
195 GST_DEBUG_FUNCPTR (gst_funnel_sink_event));
196 gst_pad_set_query_function (sinkpad,
197 GST_DEBUG_FUNCPTR (gst_funnel_sink_query));
199 gst_pad_set_active (sinkpad, TRUE);
201 gst_element_add_pad (element, sinkpad);
207 gst_funnel_release_pad (GstElement * element, GstPad * pad)
209 GstFunnel *funnel = GST_FUNNEL (element);
211 GST_DEBUG_OBJECT (funnel, "releasing pad");
213 gst_pad_set_active (pad, FALSE);
215 gst_element_remove_pad (GST_ELEMENT_CAST (funnel), pad);
219 gst_funnel_sink_chain (GstPad * pad, GstObject * parent, GstBuffer * buffer)
222 GstFunnel *funnel = GST_FUNNEL (parent);
223 GstFunnelPad *fpad = GST_FUNNEL_PAD_CAST (pad);
224 GstEvent *event = NULL;
230 GST_DEBUG_OBJECT (funnel, "received buffer %p", buffer);
232 GST_OBJECT_LOCK (funnel);
233 if (fpad->segment.format == GST_FORMAT_UNDEFINED) {
234 GST_WARNING_OBJECT (funnel, "Got buffer without segment,"
235 " setting segment [0,inf[");
236 gst_segment_init (&fpad->segment, GST_FORMAT_TIME);
239 if (GST_CLOCK_TIME_IS_VALID (GST_BUFFER_TIMESTAMP (buffer)))
240 fpad->segment.position = GST_BUFFER_TIMESTAMP (buffer);
242 newts = gst_segment_to_running_time (&fpad->segment,
243 fpad->segment.format, GST_BUFFER_TIMESTAMP (buffer));
244 if (newts != GST_BUFFER_TIMESTAMP (buffer)) {
245 buffer = gst_buffer_make_writable (buffer);
246 GST_BUFFER_TIMESTAMP (buffer) = newts;
249 if (!funnel->has_segment) {
252 gst_segment_init (&segment, GST_FORMAT_TIME);
253 event = gst_event_new_segment (&segment);
254 funnel->has_segment = TRUE;
256 GST_OBJECT_UNLOCK (funnel);
259 if (!gst_pad_push_event (funnel->srcpad, event))
260 GST_WARNING_OBJECT (funnel, "Could not push out newsegment event");
263 GST_OBJECT_LOCK (pad);
264 padcaps = GST_PAD_CAPS (funnel->srcpad);
265 GST_OBJECT_UNLOCK (pad);
267 if (GST_BUFFER_CAPS (buffer) && GST_BUFFER_CAPS (buffer) != padcaps) {
268 if (!gst_pad_set_caps (funnel->srcpad, GST_BUFFER_CAPS (buffer))) {
269 res = GST_FLOW_NOT_NEGOTIATED;
275 res = gst_pad_push (funnel->srcpad, buffer);
277 GST_LOG_OBJECT (funnel, "handled buffer %s", gst_flow_get_name (res));
287 gst_funnel_sink_event (GstPad * pad, GstObject * parent, GstEvent * event)
289 GstFunnel *funnel = GST_FUNNEL (parent);
290 GstFunnelPad *fpad = GST_FUNNEL_PAD_CAST (pad);
291 gboolean forward = TRUE;
294 switch (GST_EVENT_TYPE (event)) {
295 case GST_EVENT_SEGMENT:
297 GST_OBJECT_LOCK (funnel);
298 gst_event_copy_segment (event, &fpad->segment);
299 GST_OBJECT_UNLOCK (funnel);
304 case GST_EVENT_FLUSH_STOP:
306 GST_OBJECT_LOCK (funnel);
307 gst_segment_init (&fpad->segment, GST_FORMAT_UNDEFINED);
308 funnel->has_segment = FALSE;
309 GST_OBJECT_UNLOCK (funnel);
317 res = gst_pad_push_event (funnel->srcpad, event);
319 gst_event_unref (event);
325 gst_funnel_sink_query (GstPad * pad, GstObject * parent, GstQuery * query)
327 GstFunnel *funnel = GST_FUNNEL (parent);
328 gboolean forward = TRUE;
332 res = gst_pad_peer_query (funnel->srcpad, query);
338 gst_funnel_src_event (GstPad * pad, GstObject * parent, GstEvent * event)
343 gboolean result = FALSE;
344 gboolean done = FALSE;
345 GValue value = { 0, };
347 funnel = GST_ELEMENT_CAST (parent);
349 iter = gst_element_iterate_sink_pads (funnel);
352 switch (gst_iterator_next (iter, &value)) {
353 case GST_ITERATOR_OK:
354 sinkpad = g_value_get_object (&value);
355 gst_event_ref (event);
356 result |= gst_pad_push_event (sinkpad, event);
357 g_value_reset (&value);
359 case GST_ITERATOR_RESYNC:
360 gst_iterator_resync (iter);
363 case GST_ITERATOR_ERROR:
364 GST_WARNING_OBJECT (funnel, "Error iterating sinkpads");
365 case GST_ITERATOR_DONE:
370 g_value_unset (&value);
371 gst_iterator_free (iter);
372 gst_event_unref (event);
378 reset_pad (const GValue * data, gpointer user_data)
380 GstPad *pad = g_value_get_object (data);
381 GstFunnelPad *fpad = GST_FUNNEL_PAD_CAST (pad);
383 GST_OBJECT_LOCK (pad);
384 gst_funnel_pad_reset (fpad);
385 GST_OBJECT_UNLOCK (pad);
388 static GstStateChangeReturn
389 gst_funnel_change_state (GstElement * element, GstStateChange transition)
391 GstFunnel *funnel = GST_FUNNEL (element);
392 GstStateChangeReturn ret;
394 switch (transition) {
395 case GST_STATE_CHANGE_READY_TO_PAUSED:
397 GstIterator *iter = gst_element_iterate_sink_pads (element);
398 GstIteratorResult res;
401 res = gst_iterator_foreach (iter, reset_pad, NULL);
402 } while (res == GST_ITERATOR_RESYNC);
404 gst_iterator_free (iter);
406 if (res == GST_ITERATOR_ERROR)
407 return GST_STATE_CHANGE_FAILURE;
409 GST_OBJECT_LOCK (funnel);
410 funnel->has_segment = FALSE;
411 GST_OBJECT_UNLOCK (funnel);
418 ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);