tests/example: New small example of timeline file sources.

This examples takes a list of files with audio tracks, and plays the first
second of each.

This demonstrates the usage of GESTimelineFileSource

tests/examples/Makefile.am

@@ -1,4 +1,4 @@
-noinst_PROGRAMS = test1
+noinst_PROGRAMS = test1 test2
 
 AM_CFLAGS = $(GST_CFLAGS) -I$(top_srcdir)
 LDADD = $(GST_LBS) $(top_builddir)/ges/libges-@GST_MAJORMINOR@.la -lges-@GST_MAJORMINOR@

tests/examples/test2.c

@@ -0,0 +1,102 @@
+/* GStreamer Editing Services
+ * Copyright (C) 2009 Edward Hervey <bilboed@bilboed.com>
+ *
+ * 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.
+ */
+
+#include <ges/ges.h>
+
+int
+main (int argc, gchar ** argv)
+{
+  GESTimelinePipeline *pipeline;
+  GESTimeline *timeline;
+  GESTrack *tracka;
+  GESTimelineLayer *layer;
+  GList *sources = NULL;
+  GMainLoop *mainloop;
+  GstClockTime offset = 0;
+  guint i;
+
+  if (argc < 2) {
+    g_print ("Usage: %s <list of audio files>\n", argv[0]);
+    return -1;
+  }
+
+  /* Initialize GStreamer (this will parse environment variables and commandline
+   * arguments. */
+  gst_init (&argc, &argv);
+
+  /* Initialize the GStreamer Editing Services */
+  ges_init ();
+
+  /* Setup of an audio timeline */
+
+  /* This is our main GESTimeline */
+  timeline = ges_timeline_new ();
+
+  tracka = ges_track_audio_raw_new ();
+
+  /* We are only going to be doing one layer of timeline objects */
+  layer = ges_timeline_layer_new ();
+
+  /* Add the tracks and the layer to the timeline */
+  if (!ges_timeline_add_layer (timeline, layer))
+    return -1;
+  if (!ges_timeline_add_track (timeline, tracka))
+    return -1;
+
+  /* Here we've finished initializing our timeline, we're 
+   * ready to start using it... by solely working with the layer !*/
+
+  for (i = 1; i < argc; i++, offset += GST_SECOND) {
+    gchar *uri = g_strdup_printf ("file://%s", argv[i]);
+    GESTimelineFileSource *src = ges_timeline_filesource_new (uri);
+
+    g_assert (src);
+    g_free (uri);
+
+    g_object_set (src, "start", offset, "duration", GST_SECOND, NULL);
+
+    ges_timeline_layer_add_object (layer, (GESTimelineObject *) src);
+
+    sources = g_list_append (sources, src);
+  }
+
+  /* In order to view our timeline, let's grab a convenience pipeline to put
+   * our timeline in. */
+  pipeline = ges_timeline_pipeline_new ();
+
+  /* Add the timeline to that pipeline */
+  if (!ges_timeline_pipeline_add_timeline (pipeline, timeline))
+    return -1;
+
+  /* The following is standard usage of a GStreamer pipeline (note how you haven't
+   * had to care about GStreamer so far ?).
+   *
+   * We set the pipeline to playing ... */
+  gst_element_set_state (GST_ELEMENT (pipeline), GST_STATE_PLAYING);
+
+  /* .. and we start a GMainLoop. GES **REQUIRES** a GMainLoop to be running in
+   * order to function properly ! */
+  mainloop = g_main_loop_new (NULL, FALSE);
+
+  /* Simple code to have the mainloop shutdown after 4s */
+  g_timeout_add_seconds (argc, (GSourceFunc) g_main_loop_quit, mainloop);
+  g_main_loop_run (mainloop);
+
+  return 0;
+}