configure.ac: Adding examples/switch/Makefile

Original commit message from CVS:
2004-01-11  Julien MOUTTE  <julien@moutte.net>

* configure.ac: Adding examples/switch/Makefile
* examples/Makefile.am: Adding examples/switch
* examples/switch/Makefile.am: Adding switcher example.
* examples/switch/switcher.c: (got_eos), (idle_iterate),
(switch_timer), (main): Adding an example demonstrating switch usage
with 2 videotestsrc showing different patterns.
* gst/switch/gstswitch.c: (gst_switch_request_new_pad),
(gst_switch_init): Fixing switch with the new caps system.

configure.ac

@@ -1664,6 +1664,7 @@ examples/capsfilter/Makefile
 examples/seeking/Makefile
 examples/indexing/Makefile
 examples/gstplay/Makefile
+examples/switch/Makefile
 examples/Makefile
 testsuite/spider/Makefile
 testsuite/alsa/Makefile

examples/Makefile.am

@@ -10,5 +10,5 @@ else
 GTK_SUBDIRS=
 endif
 
-SUBDIRS=$(GTK_SUBDIRS) gstplay
-DIST_SUBDIRS=capsfilter dynparams seeking indexing gstplay
+SUBDIRS=$(GTK_SUBDIRS) gstplay switch
+DIST_SUBDIRS=capsfilter dynparams seeking indexing gstplay switch

examples/switch/Makefile.am

@@ -0,0 +1,7 @@
+
+noinst_PROGRAMS = switcher
+
+switcher_SOURCES = switcher.c
+switcher_CFLAGS = $(GST_CFLAGS)
+switcher_LDFLAGS = $(GST_LIBS)
+

examples/switch/switcher.c

@@ -0,0 +1,107 @@
+/* GStreamer
+ * Copyright (C) 2003 Julien Moutte <julien@moutte.net>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ */
+ 
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <gst/gst.h>
+
+static GMainLoop *loop = NULL;
+
+
+
+static void
+got_eos (GstElement *pipeline)
+{
+  g_main_loop_quit (loop);
+}
+
+static gboolean
+idle_iterate (GstElement *pipeline)
+{
+  gst_bin_iterate (GST_BIN (pipeline));
+  return (GST_STATE (GST_ELEMENT (pipeline)) == GST_STATE_PLAYING);
+}
+
+static gboolean
+switch_timer (GstElement *video_switch)
+{
+  gint nb_sources, active_source;
+  
+  g_object_get (G_OBJECT (video_switch), "nb_sources", &nb_sources, NULL);
+  g_object_get (G_OBJECT (video_switch), "active_source",
+                &active_source, NULL);
+  
+  active_source ++;
+  
+  if (active_source > nb_sources - 1)
+    active_source = 0;
+  
+  g_object_set (G_OBJECT (video_switch), "active_source",
+                active_source, NULL);
+  
+  g_message ("current number of sources : %d, active source %d",
+             nb_sources, active_source);
+  
+  return (GST_STATE (GST_ELEMENT (video_switch)) == GST_STATE_PLAYING);
+}
+
+int
+main (int argc, char *argv[])
+{
+  GstElement *pipeline, *src1, *src2, *video_switch, *video_sink;
+
+  /* Initing GStreamer library */
+  gst_init (&argc, &argv);
+
+  loop = g_main_loop_new (NULL, FALSE);
+  
+  pipeline = gst_pipeline_new ("pipeline");
+  src1 = gst_element_factory_make ("videotestsrc", "src1");
+  g_object_set (G_OBJECT (src1), "pattern", 0, NULL);
+  src2 = gst_element_factory_make ("videotestsrc", "src2");
+  g_object_set (G_OBJECT (src2), "pattern", 1, NULL);
+  video_switch = gst_element_factory_make ("switch", "video_switch");
+  video_sink = gst_element_factory_make ("ximagesink", "video_sink");
+  
+  gst_bin_add_many (GST_BIN (pipeline), src1, src2, video_switch,
+                    video_sink, NULL);
+  
+  gst_element_link (src1, video_switch);
+  gst_element_link (src2, video_switch);
+  gst_element_link (video_switch, video_sink);
+  
+  g_signal_connect (G_OBJECT (pipeline), "eos",
+                    G_CALLBACK (got_eos), NULL);
+
+  gst_element_set_state (GST_ELEMENT (pipeline), GST_STATE_PLAYING);
+  
+  g_idle_add ((GSourceFunc) idle_iterate, pipeline);
+  g_timeout_add (2000, (GSourceFunc) switch_timer, video_switch);
+  
+  g_main_loop_run (loop);
+
+  gst_element_set_state (GST_ELEMENT (pipeline), GST_STATE_READY);
+  
+  /* unref */
+  gst_object_unref (GST_OBJECT (pipeline));
+
+  exit (0);
+}

gst/switch/gstswitch.c

@@ -66,6 +66,7 @@ gst_switch_request_new_pad (GstElement *element,
   
   g_return_val_if_fail (GST_IS_SWITCH (element), NULL);
   
+  /* We only provide requested sink pads */
   if (templ->direction != GST_PAD_SINK) {
     g_warning ("gstswitch: requested a non sink pad\n");
     return NULL;
@@ -80,6 +81,9 @@ gst_switch_request_new_pad (GstElement *element,
   if (name)
     g_free (name);
   
+  /* That pad will proxy caps */
+  gst_pad_set_getcaps_function (sinkpad, gst_pad_proxy_getcaps);
+  
   gst_element_add_pad (GST_ELEMENT (gstswitch), sinkpad);
   
   switchpad = g_new0 (GstSwitchPad, 1);
@@ -234,7 +238,7 @@ gst_switch_init (GstSwitch *gstswitch)
 {
   gstswitch->srcpad = gst_pad_new ("src", GST_PAD_SRC);
   gst_element_add_pad (GST_ELEMENT (gstswitch), gstswitch->srcpad);
-  
+  gst_pad_set_getcaps_function (gstswitch->srcpad, gst_pad_proxy_getcaps);
   gst_element_set_loop_function (GST_ELEMENT (gstswitch), gst_switch_loop);
   
   gstswitch->sinkpads = NULL;