File: ges-image-source.c

package info (click to toggle)
gstreamer-editing-services1.0 1.14.4-1
  • links: PTS, VCS
  • area: main
  • in suites: bullseye, buster
  • size: 8,388 kB
  • sloc: ansic: 43,396; sh: 4,773; perl: 1,583; makefile: 1,172; python: 581; xml: 80; lex: 44
file content (194 lines) | stat: -rw-r--r-- 5,533 bytes parent folder | download
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
/* GStreamer Editing Services
 * Copyright (C) 2009 Edward Hervey <edward.hervey@collabora.co.uk>
 *               2009 Nokia Corporation
 *
 * 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:gesimagesource
 * @title: GESImageSource
 * @short_description: outputs the video stream from a media file as a still
 * image.
 *
 * Outputs the video stream from a given file as a still frame. The frame
 * chosen will be determined by the in-point property on the track element. For
 * image files, do not set the in-point property.
 */

#include "ges-internal.h"
#include "ges-track-element.h"
#include "ges-image-source.h"

G_DEFINE_TYPE (GESImageSource, ges_image_source, GES_TYPE_VIDEO_SOURCE);

struct _GESImageSourcePrivate
{
  /*  Dummy variable */
  void *nothing;
};

enum
{
  PROP_0,
  PROP_URI
};

static void
ges_image_source_get_property (GObject * object, guint property_id,
    GValue * value, GParamSpec * pspec)
{
  GESImageSource *uriclip = GES_IMAGE_SOURCE (object);

  switch (property_id) {
    case PROP_URI:
      g_value_set_string (value, uriclip->uri);
      break;
    default:
      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
  }
}

static void
ges_image_source_set_property (GObject * object, guint property_id,
    const GValue * value, GParamSpec * pspec)
{
  GESImageSource *uriclip = GES_IMAGE_SOURCE (object);

  switch (property_id) {
    case PROP_URI:
      uriclip->uri = g_value_dup_string (value);
      break;
    default:
      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
  }
}

static void
ges_image_source_dispose (GObject * object)
{
  GESImageSource *uriclip = GES_IMAGE_SOURCE (object);

  if (uriclip->uri)
    g_free (uriclip->uri);

  G_OBJECT_CLASS (ges_image_source_parent_class)->dispose (object);
}

static void
pad_added_cb (GstElement * timeline, GstPad * pad, GstElement * scale)
{
  GstPad *sinkpad;
  GstPadLinkReturn ret;

  sinkpad = gst_element_get_static_pad (scale, "sink");
  if (sinkpad) {
    GST_DEBUG ("got sink pad, trying to link");

    ret = gst_pad_link (pad, sinkpad);
    gst_object_unref (sinkpad);
    if (GST_PAD_LINK_SUCCESSFUL (ret)) {
      GST_DEBUG ("linked ok, returning");
      return;
    }
  }

  GST_DEBUG ("pad failed to link properly");
}

static GstElement *
ges_image_source_create_source (GESTrackElement * track_element)
{
  GstElement *bin, *source, *scale, *freeze, *iconv;
  GstPad *src, *target;

  bin = GST_ELEMENT (gst_bin_new ("still-image-bin"));
  source = gst_element_factory_make ("uridecodebin", NULL);
  scale = gst_element_factory_make ("videoscale", NULL);
  freeze = gst_element_factory_make ("imagefreeze", NULL);
  iconv = gst_element_factory_make ("videoconvert", NULL);

  g_object_set (scale, "add-borders", TRUE, NULL);

  gst_bin_add_many (GST_BIN (bin), source, scale, freeze, iconv, NULL);

  gst_element_link_pads_full (scale, "src", iconv, "sink",
      GST_PAD_LINK_CHECK_NOTHING);
  gst_element_link_pads_full (iconv, "src", freeze, "sink",
      GST_PAD_LINK_CHECK_NOTHING);

  /* FIXME: add capsfilter here with sink caps (see 626518) */

  target = gst_element_get_static_pad (freeze, "src");

  src = gst_ghost_pad_new ("src", target);
  gst_element_add_pad (bin, src);
  gst_object_unref (target);

  g_object_set (source, "uri", ((GESImageSource *) track_element)->uri, NULL);

  g_signal_connect (G_OBJECT (source), "pad-added",
      G_CALLBACK (pad_added_cb), scale);

  return bin;
}

static void
ges_image_source_class_init (GESImageSourceClass * klass)
{
  GObjectClass *object_class = G_OBJECT_CLASS (klass);
  GESVideoSourceClass *source_class = GES_VIDEO_SOURCE_CLASS (klass);

  g_type_class_add_private (klass, sizeof (GESImageSourcePrivate));

  object_class->get_property = ges_image_source_get_property;
  object_class->set_property = ges_image_source_set_property;
  object_class->dispose = ges_image_source_dispose;

  /**
   * GESImageSource:uri:
   *
   * The location of the file/resource to use.
   */
  g_object_class_install_property (object_class, PROP_URI,
      g_param_spec_string ("uri", "URI", "uri of the resource",
          NULL, G_PARAM_READWRITE | G_PARAM_CONSTRUCT_ONLY));

  GES_TIMELINE_ELEMENT_CLASS (klass)->set_inpoint = NULL;
  source_class->create_source = ges_image_source_create_source;
}

static void
ges_image_source_init (GESImageSource * self)
{
  self->priv = G_TYPE_INSTANCE_GET_PRIVATE (self,
      GES_TYPE_IMAGE_SOURCE, GESImageSourcePrivate);
}

/**
 * ges_image_source_new:
 * @uri: the URI the source should control
 *
 * Creates a new #GESImageSource for the provided @uri.
 *
 * Returns: (transfer floating): A new #GESImageSource.
 */
GESImageSource *
ges_image_source_new (gchar * uri)
{
  return g_object_new (GES_TYPE_IMAGE_SOURCE, "uri", uri, "track-type",
      GES_TRACK_TYPE_VIDEO, NULL);
}