gstreamer/tests/examples/transition.c

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/* GStreamer Editing Services
* Copyright (C) 2010 Brandon Lewis <brandon@alum.berkeley.edu>
*
* 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.
*/
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#include <stdlib.h>
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#include <ges/ges.h>
#include <stdlib.h>
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typedef struct
{
int type;
char *name;
} transition_type;
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GESTimelineObject *make_source (char *path, guint64 start, guint64 duration,
gint priority);
gboolean print_transition_data (GESTimelineObject * tr);
GESTimelinePipeline *make_timeline (char *nick, double tdur, char *patha,
float adur, char *pathb, float bdur);
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GESTimelineObject *
make_source (char *path, guint64 start, guint64 duration, gint priority)
{
char *uri = g_strdup_printf ("file://%s", path);
GESTimelineObject *ret =
GES_TIMELINE_OBJECT (ges_timeline_filesource_new (uri));
g_object_set (ret,
"start", (guint64) start,
"duration", (guint64) duration,
"priority", (guint32) priority, "in-point", (guint64) 0, NULL);
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g_free (uri);
return ret;
}
gboolean
print_transition_data (GESTimelineObject * tr)
{
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GESTrackObject *trackobj;
GstElement *gnlobj;
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guint64 start, duration;
gint priority;
char *name;
GList *trackobjects, *tmp;
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if (!tr)
return FALSE;
if (!(trackobjects = ges_timeline_object_get_track_objects (tr)))
return FALSE;
if (!(trackobj = GES_TRACK_OBJECT (trackobjects->data)))
return FALSE;
if (!(gnlobj = ges_track_object_get_gnlobject (trackobj)))
return FALSE;
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g_object_get (gnlobj, "start", &start, "duration", &duration,
"priority", &priority, "name", &name, NULL);
g_print ("gnlobject for %s: %f %f %d\n", name,
((gfloat) start) / GST_SECOND,
((gfloat) duration) / GST_SECOND, priority);
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for (tmp = trackobjects; tmp; tmp = tmp->next) {
g_object_unref (GES_TRACK_OBJECT (tmp->data));
}
g_list_free (trackobjects);
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return FALSE;
}
GESTimelinePipeline *
make_timeline (char *nick, double tdur, char *patha, float adur,
char *pathb, float bdur)
{
GESTimeline *timeline;
GESTrack *trackv, *tracka;
GESTimelineLayer *layer1;
GESTimelineObject *srca, *srcb;
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GESTimelinePipeline *pipeline;
guint64 aduration, bduration, tduration, tstart;
GESTimelineStandardTransition *tr = NULL;
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pipeline = ges_timeline_pipeline_new ();
ges_timeline_pipeline_set_mode (pipeline, TIMELINE_MODE_PREVIEW_VIDEO);
timeline = ges_timeline_new ();
ges_timeline_pipeline_add_timeline (pipeline, timeline);
trackv = ges_track_video_raw_new ();
ges_timeline_add_track (timeline, trackv);
tracka = ges_track_audio_raw_new ();
ges_timeline_add_track (timeline, tracka);
layer1 = GES_TIMELINE_LAYER (ges_timeline_layer_new ());
g_object_set (layer1, "priority", (gint32) 0, NULL);
if (!ges_timeline_add_layer (timeline, layer1))
exit (-1);
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aduration = (guint64) (adur * GST_SECOND);
bduration = (guint64) (bdur * GST_SECOND);
tduration = (guint64) (tdur * GST_SECOND);
tstart = aduration - tduration;
srca = make_source (patha, 0, aduration, 1);
srcb = make_source (pathb, tstart, bduration, 2);
ges_timeline_layer_add_object (layer1, srca);
ges_timeline_layer_add_object (layer1, srcb);
g_timeout_add_seconds (1, (GSourceFunc) print_transition_data, srca);
g_timeout_add_seconds (1, (GSourceFunc) print_transition_data, srcb);
if (tduration != 0) {
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g_print ("creating transition at %" GST_TIME_FORMAT " of %f duration (%"
GST_TIME_FORMAT ")\n", GST_TIME_ARGS (tstart), tdur,
GST_TIME_ARGS (tduration));
if (!(tr = ges_timeline_standard_transition_new_for_nick (nick)))
g_error ("invalid transition type %s\n", nick);
g_object_set (tr,
"start", (guint64) tstart,
"duration", (guint64) tduration, "in-point", (guint64) 0, NULL);
ges_timeline_layer_add_object (layer1, GES_TIMELINE_OBJECT (tr));
g_timeout_add_seconds (1, (GSourceFunc) print_transition_data, tr);
}
return pipeline;
}
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int
main (int argc, char **argv)
{
GError *err = NULL;
GOptionContext *ctx;
GESTimelinePipeline *pipeline;
GMainLoop *mainloop;
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gchar *type = (gchar *) "crossfade";
gdouble adur, bdur, tdur;
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GOptionEntry options[] = {
{"type", 't', 0, G_OPTION_ARG_STRING, &type,
"type of transition to create", "<smpte-transition>"},
{"duration", 'd', 0, G_OPTION_ARG_DOUBLE, &tdur,
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"duration of transition", "seconds"},
{NULL}
};
if (!g_thread_supported ())
g_thread_init (NULL);
ctx = g_option_context_new ("- transition between two media files");
g_option_context_add_main_entries (ctx, options, NULL);
g_option_context_add_group (ctx, gst_init_get_option_group ());
if (!g_option_context_parse (ctx, &argc, &argv, &err)) {
g_print ("Error initializing %s\n", err->message);
exit (1);
}
if (argc < 4) {
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g_print ("%s", g_option_context_get_help (ctx, TRUE, NULL));
exit (0);
}
g_option_context_free (ctx);
ges_init ();
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adur = (gdouble) atof (argv[2]);
bdur = (gdouble) atof (argv[4]);
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pipeline = make_timeline (type, tdur, argv[1], adur, argv[3], bdur);
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mainloop = g_main_loop_new (NULL, FALSE);
g_timeout_add_seconds ((adur + bdur) + 1, (GSourceFunc) g_main_loop_quit,
mainloop);
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gst_element_set_state (GST_ELEMENT (pipeline), GST_STATE_PLAYING);
g_main_loop_run (mainloop);
return 0;
}