gstreamer/subprojects/gst-editing-services/examples/c/transition.c

207 lines
6.2 KiB
C

/* 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., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#include <stdlib.h>
#include <ges/ges.h>
#include <stdlib.h>
typedef struct
{
int type;
char *name;
} transition_type;
GESClip *make_source (gchar * path, guint64 start, guint64 inpoint,
guint64 duration, gint priority);
gboolean print_transition_data (GESClip * tr);
GESPipeline *make_timeline (gchar * nick, double tdur, gchar * patha,
gfloat adur, gdouble ainpoint, gchar * pathb, gfloat bdur,
gdouble binpoint);
GESClip *
make_source (gchar * path, guint64 start, guint64 duration, guint64 inpoint,
gint priority)
{
gchar *uri = gst_filename_to_uri (path, NULL);
GESClip *ret = GES_CLIP (ges_uri_clip_new (uri));
g_object_set (ret,
"start", (guint64) start,
"duration", (guint64) duration,
"priority", (guint32) priority, "in-point", (guint64) inpoint, NULL);
g_free (uri);
return ret;
}
gboolean
print_transition_data (GESClip * tr)
{
GESTrackElement *trackelement;
GstElement *nleobj;
guint64 start, duration;
gint priority;
char *name;
GList *trackelements;
if (!tr)
return FALSE;
if (!(trackelements = GES_CONTAINER_CHILDREN (tr)))
return FALSE;
if (!(trackelement = GES_TRACK_ELEMENT (trackelements->data)))
return FALSE;
if (!(nleobj = ges_track_element_get_nleobject (trackelement)))
return FALSE;
g_object_get (nleobj, "start", &start, "duration", &duration,
"priority", &priority, "name", &name, NULL);
gst_print ("nleobject for %s: %f %f %d\n", name,
((gfloat) start) / GST_SECOND,
((gfloat) duration) / GST_SECOND, priority);
return FALSE;
}
GESPipeline *
make_timeline (gchar * nick, gdouble tdur, gchar * patha, gfloat adur,
gdouble ainp, gchar * pathb, gfloat bdur, gdouble binp)
{
GESTimeline *timeline;
GESTrack *trackv, *tracka;
GESLayer *layer1;
GESClip *srca, *srcb;
GESPipeline *pipeline;
guint64 aduration, bduration, tduration, tstart, ainpoint, binpoint;
GESTransitionClip *tr = NULL;
pipeline = ges_pipeline_new ();
ges_pipeline_set_mode (pipeline, GES_PIPELINE_MODE_PREVIEW_VIDEO);
timeline = ges_timeline_new ();
ges_pipeline_set_timeline (pipeline, timeline);
trackv = GES_TRACK (ges_video_track_new ());
ges_timeline_add_track (timeline, trackv);
tracka = GES_TRACK (ges_audio_track_new ());
ges_timeline_add_track (timeline, tracka);
layer1 = GES_LAYER (ges_layer_new ());
g_object_set (layer1, "priority", (gint32) 0, NULL);
if (!ges_timeline_add_layer (timeline, layer1))
exit (-1);
aduration = (guint64) (adur * GST_SECOND);
bduration = (guint64) (bdur * GST_SECOND);
tduration = (guint64) (tdur * GST_SECOND);
ainpoint = (guint64) (ainp * GST_SECOND);
binpoint = (guint64) (binp * GST_SECOND);
tstart = aduration - tduration;
srca = make_source (patha, 0, aduration, ainpoint, 1);
srcb = make_source (pathb, tstart, bduration, binpoint, 2);
ges_layer_add_clip (layer1, srca);
ges_layer_add_clip (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) {
gst_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_transition_clip_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_layer_add_clip (layer1, GES_CLIP (tr));
g_timeout_add_seconds (1, (GSourceFunc) print_transition_data, tr);
}
return pipeline;
}
int
main (int argc, char **argv)
{
GError *err = NULL;
GOptionContext *ctx;
GESPipeline *pipeline;
GMainLoop *mainloop;
gchar *type = (gchar *) "crossfade";
gchar *patha, *pathb;
gdouble adur, bdur, tdur, ainpoint, binpoint;
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,
"duration of transition", "seconds"},
{NULL}
};
ctx = g_option_context_new ("- transition between two media files");
g_option_context_set_summary (ctx,
"Select two files, and optionally a transition duration and type.\n"
"A file is a triplet of filename, inpoint (in seconds) and duration (in seconds).\n"
"Example:\n" "transition file1.avi 0 5 file2.avi 25 5 -d 2 -t crossfade");
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)) {
gst_print ("Error initializing %s\n", err->message);
g_option_context_free (ctx);
g_clear_error (&err);
exit (1);
}
if (argc < 4) {
gst_print ("%s", g_option_context_get_help (ctx, TRUE, NULL));
exit (0);
}
g_option_context_free (ctx);
ges_init ();
patha = argv[1];
ainpoint = (gdouble) atof (argv[2]);
adur = (gdouble) atof (argv[3]);
pathb = argv[4];
binpoint = (gdouble) atof (argv[5]);
bdur = (gdouble) atof (argv[6]);
pipeline =
make_timeline (type, tdur, patha, adur, ainpoint, pathb, bdur, binpoint);
mainloop = g_main_loop_new (NULL, FALSE);
g_timeout_add_seconds ((adur + bdur) + 1, (GSourceFunc) g_main_loop_quit,
mainloop);
gst_element_set_state (GST_ELEMENT (pipeline), GST_STATE_PLAYING);
g_main_loop_run (mainloop);
return 0;
}