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Document first high-level demo.

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This commit is contained in:
Edward Hervey 2009-09-10 18:53:31 +02:00
parent dff4e20cb5
commit 533cc611cb
1 changed files with 45 additions and 3 deletions
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48
tests/examples/test1.c
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@ -19,7 +19,7 @@
#include <ges/ges.h>
/* A simple timeline with 3 video-only sources */
/* A simple timeline with 3 audio/video sources */
static gboolean
fill_customsrc (GESTimelineObject * object, GESTrackObject * trobject,
@ -28,6 +28,9 @@ fill_customsrc (GESTimelineObject * object, GESTrackObject * trobject,
GstElement *src;
guint var = GPOINTER_TO_UINT (user_data);
/* Based on the Track type, we will either put a videotestsrc
* or an audiotestsrc */
if (trobject->track->type == GES_TRACK_TYPE_VIDEO) {
src = gst_element_factory_make ("videotestsrc", NULL);
g_object_set (src, "pattern", var, NULL);
@ -37,6 +40,7 @@ fill_customsrc (GESTimelineObject * object, GESTrackObject * trobject,
} else
return FALSE;
/* Finally we fill in the gnlobject */
return gst_bin_add (GST_BIN (gnlobj), src);
}
@ -50,24 +54,47 @@ main (int argc, gchar ** argv)
GESCustomTimelineSource *src1, *src2, *src3;
GMainLoop *mainloop;
/* Initialize GStreamer (this will parse environment variables and commandline
* arguments. */
gst_init (&argc, &argv);
/* Initialize the GStreamer Editing Services */
ges_init ();
pipeline = ges_timeline_pipeline_new ();
/* Setup of a A/V timeline */
/* This is our main GESTimeline */
timeline = ges_timeline_new ();
/* We want to output both audio and video, therefore we
* grab two tracks, one for each output type. */
trackv = ges_track_video_raw_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, trackv))
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 !*/
/* We are here creating 3 sources of 1s each which we will put one after
* the other.
*
* For our sources, and since we want to prototype quickly, we just use
* a GESCustomTimelineSource. This will use the callback we provide to
* fill in the GESTrackObject.
* */
src1 = ges_custom_timeline_source_new (fill_customsrc, GUINT_TO_POINTER (0));
g_object_set (src1, "start", 0, "duration", GST_SECOND, NULL);
src2 = ges_custom_timeline_source_new (fill_customsrc, GUINT_TO_POINTER (1));
@ -75,16 +102,31 @@ main (int argc, gchar ** argv)
src3 = ges_custom_timeline_source_new (fill_customsrc, GUINT_TO_POINTER (0));
g_object_set (src3, "start", 2 * GST_SECOND, "duration", GST_SECOND, NULL);
/* Add those sources to our layer */
ges_timeline_layer_add_object (layer, (GESTimelineObject *) src1);
ges_timeline_layer_add_object (layer, (GESTimelineObject *) src2);
ges_timeline_layer_add_object (layer, (GESTimelineObject *) src3);
/* 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 (4, (GSourceFunc) g_main_loop_quit, mainloop);
g_main_loop_run (mainloop);