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134 lines
4.6 KiB
C
134 lines
4.6 KiB
C
/* GStreamer Editing Services
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* Copyright (C) 2009 Edward Hervey <bilboed@bilboed.com>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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#include <ges/ges.h>
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/* A simple timeline with 3 audio/video sources */
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static gboolean
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fill_customsrc (GESTimelineObject * object, GESTrackObject * trobject,
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GstElement * gnlobj, gpointer user_data)
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{
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GstElement *src;
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guint var = GPOINTER_TO_UINT (user_data);
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/* Based on the Track type, we will either put a videotestsrc
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* or an audiotestsrc */
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if (trobject->track->type == GES_TRACK_TYPE_VIDEO) {
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src = gst_element_factory_make ("videotestsrc", NULL);
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g_object_set (src, "pattern", var, NULL);
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} else if (trobject->track->type == GES_TRACK_TYPE_AUDIO) {
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src = gst_element_factory_make ("audiotestsrc", NULL);
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g_object_set (src, "freq", 440.0 * (var + 1), NULL);
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} else
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return FALSE;
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/* Finally we fill in the gnlobject */
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return gst_bin_add (GST_BIN (gnlobj), src);
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}
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int
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main (int argc, gchar ** argv)
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{
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GESTimelinePipeline *pipeline;
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GESTimeline *timeline;
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GESTrack *trackv, *tracka;
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GESTimelineLayer *layer;
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GESCustomTimelineSource *src1, *src2, *src3;
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GMainLoop *mainloop;
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/* Initialize GStreamer (this will parse environment variables and commandline
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* arguments. */
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gst_init (&argc, &argv);
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/* Initialize the GStreamer Editing Services */
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ges_init ();
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/* Setup of a A/V timeline */
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/* This is our main GESTimeline */
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timeline = ges_timeline_new ();
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/* We want to output both audio and video, therefore we
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* grab two tracks, one for each output type. */
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trackv = ges_track_video_raw_new ();
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tracka = ges_track_audio_raw_new ();
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/* We are only going to be doing one layer of timeline objects */
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layer = ges_timeline_layer_new ();
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/* Add the tracks and the layer to the timeline */
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if (!ges_timeline_add_layer (timeline, layer))
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return -1;
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if (!ges_timeline_add_track (timeline, trackv))
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return -1;
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if (!ges_timeline_add_track (timeline, tracka))
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return -1;
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/* Here we've finished initializing our timeline, we're
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* ready to start using it... by solely working with the layer !*/
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/* We are here creating 3 sources of 1s each which we will put one after
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* the other.
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*
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* For our sources, and since we want to prototype quickly, we just use
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* a GESCustomTimelineSource. This will use the callback we provide to
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* fill in the GESTrackObject.
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* */
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src1 = ges_custom_timeline_source_new (fill_customsrc, GUINT_TO_POINTER (0));
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g_object_set (src1, "start", (guint64) 0, "duration", GST_SECOND, NULL);
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src2 = ges_custom_timeline_source_new (fill_customsrc, GUINT_TO_POINTER (1));
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g_object_set (src2, "start", GST_SECOND, "duration", GST_SECOND, NULL);
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src3 = ges_custom_timeline_source_new (fill_customsrc, GUINT_TO_POINTER (0));
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g_object_set (src3, "start", 2 * GST_SECOND, "duration", GST_SECOND, NULL);
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/* Add those sources to our layer */
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ges_timeline_layer_add_object (layer, (GESTimelineObject *) src1);
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ges_timeline_layer_add_object (layer, (GESTimelineObject *) src2);
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ges_timeline_layer_add_object (layer, (GESTimelineObject *) src3);
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/* In order to view our timeline, let's grab a convenience pipeline to put
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* our timeline in. */
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pipeline = ges_timeline_pipeline_new ();
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/* Add the timeline to that pipeline */
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if (!ges_timeline_pipeline_add_timeline (pipeline, timeline))
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return -1;
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/* The following is standard usage of a GStreamer pipeline (note how you haven't
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* had to care about GStreamer so far ?).
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*
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* We set the pipeline to playing ... */
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gst_element_set_state (GST_ELEMENT (pipeline), GST_STATE_PLAYING);
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/* .. and we start a GMainLoop. GES **REQUIRES** a GMainLoop to be running in
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* order to function properly ! */
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mainloop = g_main_loop_new (NULL, FALSE);
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/* Simple code to have the mainloop shutdown after 4s */
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g_timeout_add_seconds (4, (GSourceFunc) g_main_loop_quit, mainloop);
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g_main_loop_run (mainloop);
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return 0;
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}
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