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/* 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., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <string.h>
#include <stdlib.h>
#include <gst/gst.h>
static GMainLoop *loop = NULL;
static gboolean
my_bus_callback (GstBus * bus, GstMessage * message, gpointer data)
{
g_print ("Got %s message\n", GST_MESSAGE_TYPE_NAME (message));
switch (GST_MESSAGE_TYPE (message)) {
case GST_MESSAGE_ERROR:{
GError *err;
gchar *debug;
gst_message_parse_error (message, &err, &debug);
g_print ("Error: %s\n", err->message);
g_error_free (err);
g_free (debug);
g_main_loop_quit (loop);
break;
}
case GST_MESSAGE_EOS:
/* end-of-stream */
g_main_loop_quit (loop);
break;
default:
/* unhandled message */
break;
}
/* we want to be notified again the next time there is a message
* on the bus, so returning TRUE (FALSE means we want to stop watching
* for messages on the bus and our callback should not be called again)
*/
return TRUE;
}
static gboolean
switch_timer (GstElement * video_switch)
{
gint nb_sources;
GstPad *active_pad, *new_pad;
gchar *active_name;
g_message ("switching");
g_object_get (G_OBJECT (video_switch), "n-pads", &nb_sources, NULL);
g_object_get (G_OBJECT (video_switch), "active-pad", &active_pad, NULL);
active_name = gst_pad_get_name (active_pad);
if (strcmp (active_name, "sink_0") == 0) {
new_pad = gst_element_get_static_pad (video_switch, "sink_1");
} else {
new_pad = gst_element_get_static_pad (video_switch, "sink_0");
}
g_object_set (G_OBJECT (video_switch), "active-pad", new_pad, NULL);
g_free (active_name);
gst_object_unref (new_pad);
g_message ("current number of sources : %d, active source %s",
nb_sources, gst_pad_get_name (active_pad));
return (GST_STATE (GST_ELEMENT (video_switch)) == GST_STATE_PLAYING);
}
static void
last_message_received (GObject * segment)
{
gchar *last_message;
g_object_get (segment, "last_message", &last_message, NULL);
g_print ("last-message: %s\n", last_message);
g_free (last_message);
}
int
main (int argc, char *argv[])
{
GstElement *pipeline, *src1, *src2, *video_switch, *video_sink, *segment;
GstElement *sink1_sync, *sink2_sync, *capsfilter;
GstBus *bus;
/* 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);
capsfilter = gst_element_factory_make ("capsfilter", "caps0");
g_object_set (G_OBJECT (capsfilter), "caps",
gst_caps_from_string ("video/x-raw,width=640,height=480"), NULL);
video_switch = gst_element_factory_make ("input-selector", "video_switch");
segment = gst_element_factory_make ("identity", "identity-segment");
g_object_set (G_OBJECT (segment), "silent", TRUE, NULL);
g_signal_connect (G_OBJECT (segment), "notify::last-message",
G_CALLBACK (last_message_received), segment);
g_object_set (G_OBJECT (segment), "single-segment", TRUE, NULL);
video_sink = gst_element_factory_make ("ximagesink", "video_sink");
g_object_set (G_OBJECT (video_sink), "sync", FALSE, NULL);
sink1_sync = gst_element_factory_make ("identity", "sink0_sync");
g_object_set (G_OBJECT (sink1_sync), "sync", TRUE, NULL);
sink2_sync = gst_element_factory_make ("identity", "sink1_sync");
g_object_set (G_OBJECT (sink2_sync), "sync", TRUE, NULL);
gst_bin_add_many (GST_BIN (pipeline), src1, src2, segment, video_switch,
video_sink, sink1_sync, sink2_sync, capsfilter, NULL);
gst_element_link (src1, sink1_sync);
gst_element_link (sink1_sync, video_switch);
gst_element_link (src2, capsfilter);
gst_element_link (capsfilter, sink2_sync);
gst_element_link (sink2_sync, video_switch);
gst_element_link (video_switch, segment);
gst_element_link (segment, /*scaler);
gst_element_link (scaler, */ video_sink);
bus = gst_pipeline_get_bus (GST_PIPELINE (pipeline));
gst_bus_add_watch (bus, my_bus_callback, NULL);
gst_object_unref (bus);
gst_element_set_state (GST_ELEMENT (pipeline), GST_STATE_PLAYING);
g_timeout_add (200, (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);
}
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