2 * Copyright (C) 2008 Nokia Corporation. (contact <stefan.kost@nokia.com>)
4 * This library is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Library General Public
6 * License as published by the Free Software Foundation; either
7 * version 2 of the License, or (at your option) any later version.
9 * This library is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Library General Public License for more details.
14 * You should have received a copy of the GNU Library General Public
15 * License along with this library; if not, write to the
16 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
17 * Boston, MA 02111-1307, USA.
21 * SECTION:element-output-selector
22 * @see_also: #GstTee, #GstInputSelector
24 * Direct input stream to one out of N output pads.
33 #include "gstoutputselector.h"
35 GST_DEBUG_CATEGORY_STATIC (output_selector_debug);
36 #define GST_CAT_DEFAULT output_selector_debug
38 static const GstElementDetails gst_output_selector_details =
39 GST_ELEMENT_DETAILS ("Output selector",
41 "1-to-N output stream selectoring",
42 "Stefan Kost <stefan.kost@nokia.com>");
44 static GstStaticPadTemplate gst_output_selector_sink_factory =
45 GST_STATIC_PAD_TEMPLATE ("sink",
50 static GstStaticPadTemplate gst_output_selector_src_factory =
51 GST_STATIC_PAD_TEMPLATE ("src%d",
64 GST_BOILERPLATE (GstOutputSelector, gst_output_selector, GstElement,
67 static void gst_output_selector_dispose (GObject * object);
68 static void gst_output_selector_set_property (GObject * object,
69 guint prop_id, const GValue * value, GParamSpec * pspec);
70 static void gst_output_selector_get_property (GObject * object,
71 guint prop_id, GValue * value, GParamSpec * pspec);
72 static GstPad *gst_output_selector_request_new_pad (GstElement * element,
73 GstPadTemplate * templ, const gchar * unused);
74 static void gst_output_selector_release_pad (GstElement * element,
76 static GstFlowReturn gst_output_selector_chain (GstPad * pad, GstBuffer * buf);
77 static GstStateChangeReturn gst_output_selector_change_state (GstElement *
78 element, GstStateChange transition);
79 static gboolean gst_output_selector_handle_sink_event (GstPad * pad,
83 gst_output_selector_base_init (gpointer g_class)
85 GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
87 gst_element_class_set_details (element_class, &gst_output_selector_details);
88 gst_element_class_add_pad_template (element_class,
89 gst_static_pad_template_get (&gst_output_selector_sink_factory));
90 gst_element_class_add_pad_template (element_class,
91 gst_static_pad_template_get (&gst_output_selector_src_factory));
95 gst_output_selector_class_init (GstOutputSelectorClass * klass)
97 GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
98 GstElementClass *gstelement_class = GST_ELEMENT_CLASS (klass);
100 parent_class = g_type_class_peek_parent (klass);
102 gobject_class->dispose = gst_output_selector_dispose;
104 gobject_class->set_property =
105 GST_DEBUG_FUNCPTR (gst_output_selector_set_property);
106 gobject_class->get_property =
107 GST_DEBUG_FUNCPTR (gst_output_selector_get_property);
109 g_object_class_install_property (gobject_class, PROP_ACTIVE_PAD,
110 g_param_spec_object ("active-pad", "Active pad",
111 "Currently active src pad", GST_TYPE_PAD, G_PARAM_READWRITE));
112 g_object_class_install_property (gobject_class, PROP_RESEND_LATEST,
113 g_param_spec_boolean ("resend-latest", "Resend latest buffer",
114 "Resend latest buffer after a switch to a new pad", FALSE,
117 gstelement_class->request_new_pad =
118 GST_DEBUG_FUNCPTR (gst_output_selector_request_new_pad);
119 gstelement_class->release_pad =
120 GST_DEBUG_FUNCPTR (gst_output_selector_release_pad);
122 gstelement_class->change_state = gst_output_selector_change_state;
124 GST_DEBUG_CATEGORY_INIT (output_selector_debug,
125 "output-selector", 0, "An output stream selector element");
129 gst_output_selector_init (GstOutputSelector * sel,
130 GstOutputSelectorClass * g_class)
133 gst_pad_new_from_static_template (&gst_output_selector_sink_factory,
135 gst_pad_set_chain_function (sel->sinkpad,
136 GST_DEBUG_FUNCPTR (gst_output_selector_chain));
137 gst_pad_set_event_function (sel->sinkpad,
138 GST_DEBUG_FUNCPTR (gst_output_selector_handle_sink_event));
140 gst_element_add_pad (GST_ELEMENT (sel), sel->sinkpad);
143 gst_pad_set_bufferalloc_function (sel->sinkpad,
144 GST_DEBUG_FUNCPTR (gst_output_selector_bufferalloc));
145 gst_pad_set_setcaps_function (sel->sinkpad,
146 GST_DEBUG_FUNCPTR (gst_pad_proxy_setcaps));
147 gst_pad_set_getcaps_function (sel->sinkpad,
148 GST_DEBUG_FUNCPTR (gst_pad_proxy_getcaps));
150 /* srcpad management */
151 sel->active_srcpad = NULL;
153 gst_segment_init (&sel->segment, GST_FORMAT_UNDEFINED);
154 sel->pending_srcpad = NULL;
156 sel->resend_latest = FALSE;
157 sel->latest_buffer = NULL;
161 gst_output_selector_dispose (GObject * object)
163 GstOutputSelector *osel = GST_OUTPUT_SELECTOR (object);
165 if (osel->pending_srcpad != NULL) {
166 gst_object_unref (osel->pending_srcpad);
167 osel->pending_srcpad = NULL;
169 if (osel->latest_buffer != NULL) {
170 gst_buffer_unref (osel->latest_buffer);
171 osel->latest_buffer = NULL;
174 G_OBJECT_CLASS (parent_class)->dispose (object);
178 gst_output_selector_set_property (GObject * object, guint prop_id,
179 const GValue * value, GParamSpec * pspec)
181 GstOutputSelector *sel = GST_OUTPUT_SELECTOR (object);
184 case PROP_ACTIVE_PAD:
188 next_pad = g_value_get_object (value);
190 GST_LOG_OBJECT (sel, "Activating pad %s:%s",
191 GST_DEBUG_PAD_NAME (next_pad));
193 GST_OBJECT_LOCK (object);
194 if (next_pad != sel->active_srcpad) {
195 /* switch to new srcpad in next chain run */
196 if (sel->pending_srcpad != NULL) {
197 GST_INFO ("replacing pending switch");
198 gst_object_unref (sel->pending_srcpad);
201 gst_object_ref (next_pad);
202 sel->pending_srcpad = next_pad;
204 GST_INFO ("pad already active");
205 if (sel->pending_srcpad != NULL) {
206 gst_object_unref (sel->pending_srcpad);
207 sel->pending_srcpad = NULL;
210 GST_OBJECT_UNLOCK (object);
213 case PROP_RESEND_LATEST:{
214 sel->resend_latest = g_value_get_boolean (value);
218 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
224 gst_output_selector_get_property (GObject * object, guint prop_id,
225 GValue * value, GParamSpec * pspec)
227 GstOutputSelector *sel = GST_OUTPUT_SELECTOR (object);
230 case PROP_ACTIVE_PAD:
231 GST_OBJECT_LOCK (object);
232 g_value_set_object (value, sel->active_srcpad);
233 GST_OBJECT_UNLOCK (object);
235 case PROP_RESEND_LATEST:{
236 GST_OBJECT_LOCK (object);
237 g_value_set_boolean (value, sel->resend_latest);
238 GST_OBJECT_UNLOCK (object);
242 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
248 gst_output_selector_request_new_pad (GstElement * element,
249 GstPadTemplate * templ, const gchar * name)
253 GstOutputSelector *osel;
255 osel = GST_OUTPUT_SELECTOR (element);
257 GST_DEBUG_OBJECT (osel, "requesting pad");
259 GST_OBJECT_LOCK (osel);
260 padname = g_strdup_printf ("src%d", osel->nb_srcpads++);
261 srcpad = gst_pad_new_from_template (templ, padname);
262 GST_OBJECT_UNLOCK (osel);
264 gst_pad_set_active (srcpad, TRUE);
265 gst_element_add_pad (GST_ELEMENT (osel), srcpad);
267 /* Set the first requested src pad as active by default */
268 if (osel->active_srcpad == NULL) {
269 osel->active_srcpad = srcpad;
277 gst_output_selector_release_pad (GstElement * element, GstPad * pad)
279 GstOutputSelector *osel;
281 osel = GST_OUTPUT_SELECTOR (element);
283 GST_DEBUG_OBJECT (osel, "releasing pad");
285 gst_pad_set_active (pad, FALSE);
287 gst_element_remove_pad (GST_ELEMENT_CAST (osel), pad);
291 gst_output_selector_switch (GstOutputSelector * osel)
295 GstSegment *seg = NULL;
296 gint64 start = 0, position = 0;
298 GST_INFO ("switching to pad %" GST_PTR_FORMAT, osel->pending_srcpad);
300 if (gst_pad_is_linked (osel->pending_srcpad)) {
301 /* Send NEWSEGMENT to the pad we are going to switch to */
302 seg = &osel->segment;
303 /* If resending then mark newsegment start and position accordingly */
304 if (osel->resend_latest && osel->latest_buffer &&
305 GST_BUFFER_TIMESTAMP_IS_VALID (osel->latest_buffer)) {
306 start = position = GST_BUFFER_TIMESTAMP (osel->latest_buffer);
308 start = position = seg->last_stop;
310 ev = gst_event_new_new_segment (TRUE, seg->rate,
311 seg->format, start, seg->stop, position);
312 if (!gst_pad_push_event (osel->pending_srcpad, ev)) {
313 GST_WARNING_OBJECT (osel,
314 "newsegment handling failed in %" GST_PTR_FORMAT,
315 osel->pending_srcpad);
318 /* Resend latest buffer to newly switched pad */
319 if (osel->resend_latest && osel->latest_buffer) {
320 GST_INFO ("resending latest buffer");
321 gst_pad_push (osel->pending_srcpad, osel->latest_buffer);
322 osel->latest_buffer = NULL;
326 osel->active_srcpad = osel->pending_srcpad;
328 GST_WARNING_OBJECT (osel, "switch failed, pad not linked");
332 gst_object_unref (osel->pending_srcpad);
333 osel->pending_srcpad = NULL;
339 gst_output_selector_chain (GstPad * pad, GstBuffer * buf)
342 GstOutputSelector *osel;
343 GstClockTime last_stop, duration;
345 osel = GST_OUTPUT_SELECTOR (gst_pad_get_parent (pad));
347 if (osel->pending_srcpad) {
349 gst_output_selector_switch (osel);
352 /* Keep reference to latest buffer to resend it after switch */
353 if (osel->latest_buffer)
354 gst_buffer_unref (osel->latest_buffer);
355 osel->latest_buffer = gst_buffer_ref (buf);
357 /* Keep track of last stop and use it in NEWSEGMENT start after
358 switching to a new src pad */
359 last_stop = GST_BUFFER_TIMESTAMP (buf);
360 if (GST_CLOCK_TIME_IS_VALID (last_stop)) {
361 duration = GST_BUFFER_DURATION (buf);
362 if (GST_CLOCK_TIME_IS_VALID (duration)) {
363 last_stop += duration;
365 GST_LOG_OBJECT (osel, "setting last stop %" GST_TIME_FORMAT,
366 GST_TIME_ARGS (last_stop));
367 gst_segment_set_last_stop (&osel->segment, osel->segment.format, last_stop);
370 GST_LOG_OBJECT (osel, "pushing buffer to %" GST_PTR_FORMAT,
371 osel->active_srcpad);
372 res = gst_pad_push (osel->active_srcpad, buf);
373 gst_object_unref (osel);
378 static GstStateChangeReturn
379 gst_output_selector_change_state (GstElement * element,
380 GstStateChange transition)
382 return GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
386 gst_output_selector_handle_sink_event (GstPad * pad, GstEvent * event)
389 GstOutputSelector *sel;
390 GstPad *output_pad = NULL;
392 sel = GST_OUTPUT_SELECTOR (gst_pad_get_parent (pad));
394 switch (GST_EVENT_TYPE (event)) {
395 case GST_EVENT_NEWSEGMENT:
400 gint64 start, stop, time;
402 gst_event_parse_new_segment_full (event, &update, &rate, &arate, &format,
403 &start, &stop, &time);
405 GST_DEBUG_OBJECT (sel,
406 "configured NEWSEGMENT update %d, rate %lf, applied rate %lf, "
407 "format %d, " "%" G_GINT64_FORMAT " -- %" G_GINT64_FORMAT ", time %"
408 G_GINT64_FORMAT, update, rate, arate, format, start, stop, time);
410 gst_segment_set_newsegment_full (&sel->segment, update,
411 rate, arate, format, start, stop, time);
413 /* Send newsegment to all src pads */
414 gst_pad_event_default (pad, event);
419 /* Send eos to all src pads */
420 gst_pad_event_default (pad, event);
423 /* Send other events to pending or active src pad */
425 sel->pending_srcpad ? sel->pending_srcpad : sel->active_srcpad;
426 res = gst_pad_push_event (output_pad, event);
430 gst_object_unref (sel);