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/* GStreamer Editing Services
* Copyright (C) <2013> Thibault Saunier <thibault.saunier@collabora.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
* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
/**
* SECTION: gesvideotrack
* @title: GESVideoTrack
* @short_description: A standard GESTrack for raw video
*/
#include "ges-video-track.h"
#include "ges-smart-video-mixer.h"
struct _GESVideoTrackPrivate
{
gpointer nothing;
};
#define GES_VIDEO_TRACK_GET_PRIVATE(o) (G_TYPE_INSTANCE_GET_PRIVATE ((o), GES_TYPE_VIDEO_TRACK, GESVideoTrackPrivate))
G_DEFINE_TYPE (GESVideoTrack, ges_video_track, GES_TYPE_TRACK);
static void
_sync_capsfilter_with_track (GESTrack * track, GstElement * capsfilter)
{
GstCaps *restriction, *caps;
gint fps_n, fps_d;
GstStructure *structure;
g_object_get (track, "restriction-caps", &restriction, NULL);
if (restriction == NULL)
return;
if (gst_caps_get_size (restriction) == 0)
goto done;
structure = gst_caps_get_structure (restriction, 0);
if (!gst_structure_get_fraction (structure, "framerate", &fps_n, &fps_d))
goto done;
caps =
gst_caps_new_simple ("video/x-raw", "framerate", GST_TYPE_FRACTION, fps_n,
fps_d, NULL);
g_object_set (capsfilter, "caps", caps, NULL);
gst_caps_unref (caps);
done:
gst_caps_unref (restriction);
}
static void
_track_restriction_changed_cb (GESTrack * track, GParamSpec * arg G_GNUC_UNUSED,
GstElement * capsfilter)
{
_sync_capsfilter_with_track (track, capsfilter);
}
static void
_weak_notify_cb (GESTrack * track, GstElement * capsfilter)
{
g_signal_handlers_disconnect_by_func (track,
(GCallback) _track_restriction_changed_cb, capsfilter);
}
static GstElement *
create_element_for_raw_video_gap (GESTrack * track)
{
GstElement *bin;
GstElement *capsfilter;
bin = gst_parse_bin_from_description
("videotestsrc pattern=2 name=src ! videorate ! capsfilter name=gapfilter caps=video/x-raw",
TRUE, NULL);
capsfilter = gst_bin_get_by_name (GST_BIN (bin), "gapfilter");
g_object_weak_ref (G_OBJECT (capsfilter), (GWeakNotify) _weak_notify_cb,
track);
g_signal_connect (track, "notify::restriction-caps",
(GCallback) _track_restriction_changed_cb, capsfilter);
_sync_capsfilter_with_track (track, capsfilter);
gst_object_unref (capsfilter);
return bin;
}
static void
ges_video_track_init (GESVideoTrack * ges_video_track)
{
/* GESVideoTrackPrivate *priv = GES_VIDEO_TRACK_GET_PRIVATE (ges_video_track);
*/
/* TODO: Add initialization code here */
}
static void
ges_video_track_finalize (GObject * object)
{
/* TODO: Add deinitalization code here */
G_OBJECT_CLASS (ges_video_track_parent_class)->finalize (object);
}
static void
ges_video_track_class_init (GESVideoTrackClass * klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
/* GESTrackClass *parent_class = GES_TRACK_CLASS (klass);
*/
g_type_class_add_private (klass, sizeof (GESVideoTrackPrivate));
object_class->finalize = ges_video_track_finalize;
GES_TRACK_CLASS (klass)->get_mixing_element = ges_smart_mixer_new;
}
/**
* ges_video_track_new:
*
* Creates a new #GESVideoTrack of type #GES_TRACK_TYPE_VIDEO and with generic
* raw video caps ("video/x-raw");
*
* Returns: (transfer floating): A new #GESTrack.
*/
GESVideoTrack *
ges_video_track_new (void)
{
GESVideoTrack *ret;
GstCaps *caps = gst_caps_new_empty_simple ("video/x-raw");
ret = g_object_new (GES_TYPE_VIDEO_TRACK, "track-type", GES_TRACK_TYPE_VIDEO,
"caps", caps, NULL);
ges_track_set_create_element_for_gap_func (GES_TRACK (ret),
create_element_for_raw_video_gap);
gst_caps_unref (caps);
return ret;
}
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