gstreamer/examples/c/test2.c

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/* 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
2012-11-04 00:25:20 +00:00
* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#include <ges/ges.h>
int
main (int argc, gchar ** argv)
{
GESPipeline *pipeline;
GESTimeline *timeline;
GESTrack *tracka;
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GESLayer *layer;
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 (ges_audio_track_new ());
/* We are only going to be doing one layer of clips */
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layer = ges_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 = gst_filename_to_uri (argv[i], NULL);
GESUriClip *src = ges_uri_clip_new (uri);
g_assert (src);
g_free (uri);
g_object_set (src, "start", offset, "duration", GST_SECOND, NULL);
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ges_layer_add_clip (layer, (GESClip *) src);
}
/* In order to listen our timeline, let's grab a convenience pipeline to put
* our timeline in. */
pipeline = ges_pipeline_new ();
/* Add the timeline to that pipeline */
if (!ges_pipeline_set_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 - 1, (GSourceFunc) g_main_loop_quit, mainloop);
g_main_loop_run (mainloop);
return 0;
}