1 /* GStreamer Editing Services
2 * Copyright (C) <2013> Thibault Saunier <thibault.saunier@collabora.com>
3 *
4 * This library is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Library General Public
6 * License as published by the Free Software Foundation; either
7 * version 2 of the License, or (at your option) any later version.
8 *
9 * This library is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Library General Public License for more details.
13 *
14 * You should have received a copy of the GNU Library General Public
15 * License along with this library; if not, write to the
16 * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
17 * Boston, MA 02110-1301, USA.
18 */
19
20 /**
21 * SECTION: gesvideotrack
22 * @title: GESVideoTrack
23 * @short_description: A standard GESTrack for raw video
24 */
25 #ifdef HAVE_CONFIG_H
26 #include "config.h"
27 #endif
28
29 #include "ges-video-track.h"
30 #include "ges-smart-video-mixer.h"
31
32 struct _GESVideoTrackPrivate
33 {
34 gpointer nothing;
35 };
36
37 G_DEFINE_TYPE_WITH_PRIVATE (GESVideoTrack, ges_video_track, GES_TYPE_TRACK);
38
39 static void
_sync_capsfilter_with_track(GESTrack * track,GstElement * capsfilter)40 _sync_capsfilter_with_track (GESTrack * track, GstElement * capsfilter)
41 {
42 GstCaps *restriction, *caps;
43 gint fps_n, fps_d;
44 GstStructure *structure;
45
46 g_object_get (track, "restriction-caps", &restriction, NULL);
47 if (restriction == NULL)
48 return;
49
50 if (gst_caps_get_size (restriction) == 0)
51 goto done;
52
53 structure = gst_caps_get_structure (restriction, 0);
54 if (!gst_structure_get_fraction (structure, "framerate", &fps_n, &fps_d))
55 goto done;
56
57 caps =
58 gst_caps_new_simple ("video/x-raw", "framerate", GST_TYPE_FRACTION, fps_n,
59 fps_d, NULL);
60
61 g_object_set (capsfilter, "caps", caps, NULL);
62 gst_caps_unref (caps);
63
64 done:
65 gst_caps_unref (restriction);
66 }
67
68 static void
_track_restriction_changed_cb(GESTrack * track,GParamSpec * arg G_GNUC_UNUSED,GstElement * capsfilter)69 _track_restriction_changed_cb (GESTrack * track, GParamSpec * arg G_GNUC_UNUSED,
70 GstElement * capsfilter)
71 {
72 _sync_capsfilter_with_track (track, capsfilter);
73 }
74
75 static void
_weak_notify_cb(GESTrack * track,GstElement * capsfilter)76 _weak_notify_cb (GESTrack * track, GstElement * capsfilter)
77 {
78 g_signal_handlers_disconnect_by_func (track,
79 (GCallback) _track_restriction_changed_cb, capsfilter);
80 }
81
82 static GstElement *
create_element_for_raw_video_gap(GESTrack * track)83 create_element_for_raw_video_gap (GESTrack * track)
84 {
85 GstElement *bin;
86 GstElement *capsfilter;
87
88 bin = gst_parse_bin_from_description
89 ("videotestsrc pattern=2 name=src ! videorate ! capsfilter name=gapfilter caps=video/x-raw",
90 TRUE, NULL);
91
92 capsfilter = gst_bin_get_by_name (GST_BIN (bin), "gapfilter");
93 g_object_weak_ref (G_OBJECT (capsfilter), (GWeakNotify) _weak_notify_cb,
94 track);
95 g_signal_connect (track, "notify::restriction-caps",
96 (GCallback) _track_restriction_changed_cb, capsfilter);
97
98 _sync_capsfilter_with_track (track, capsfilter);
99
100 gst_object_unref (capsfilter);
101
102 return bin;
103 }
104
105 static void
ges_video_track_init(GESVideoTrack * ges_video_track)106 ges_video_track_init (GESVideoTrack * ges_video_track)
107 {
108 /* GESVideoTrackPrivate *priv = GES_VIDEO_TRACK_GET_PRIVATE (ges_video_track);
109 */
110
111 /* TODO: Add initialization code here */
112 }
113
114 static void
ges_video_track_finalize(GObject * object)115 ges_video_track_finalize (GObject * object)
116 {
117 /* TODO: Add deinitalization code here */
118
119 G_OBJECT_CLASS (ges_video_track_parent_class)->finalize (object);
120 }
121
122 static void
ges_video_track_class_init(GESVideoTrackClass * klass)123 ges_video_track_class_init (GESVideoTrackClass * klass)
124 {
125 GObjectClass *object_class = G_OBJECT_CLASS (klass);
126 /* GESTrackClass *parent_class = GES_TRACK_CLASS (klass);
127 */
128
129 object_class->finalize = ges_video_track_finalize;
130
131 GES_TRACK_CLASS (klass)->get_mixing_element = ges_smart_mixer_new;
132 }
133
134 /**
135 * ges_video_track_new:
136 *
137 * Creates a new #GESVideoTrack of type #GES_TRACK_TYPE_VIDEO and with generic
138 * raw video caps ("video/x-raw");
139 *
140 * Returns: (transfer floating): A new #GESTrack.
141 */
142 GESVideoTrack *
ges_video_track_new(void)143 ges_video_track_new (void)
144 {
145 GESVideoTrack *ret;
146 GstCaps *caps = gst_caps_new_empty_simple ("video/x-raw");
147
148 ret = g_object_new (GES_TYPE_VIDEO_TRACK, "track-type", GES_TRACK_TYPE_VIDEO,
149 "caps", caps, NULL);
150
151 ges_track_set_create_element_for_gap_func (GES_TRACK (ret),
152 create_element_for_raw_video_gap);
153
154 gst_caps_unref (caps);
155
156 return ret;
157 }
158