1 /* GStreamer Editing Services
2 * Copyright (C) 2009 Edward Hervey <edward.hervey@collabora.co.uk>
3 * 2009 Nokia Corporation
5 * This library is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU Library General Public
7 * License as published by the Free Software Foundation; either
8 * version 2 of the License, or (at your option) any later version.
10 * This library is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * Library General Public License for more details.
15 * You should have received a copy of the GNU Library General Public
16 * License along with this library; if not, write to the
17 * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
18 * Boston, MA 02110-1301, USA.
24 * @short_description: Base Class for single-media sources
30 #include "ges-internal.h"
31 #include "ges/ges-meta-container.h"
32 #include "ges-track-element.h"
33 #include "ges-source.h"
34 #include "ges-layer.h"
35 #include "gstframepositioner.h"
36 struct _GESSourcePrivate
39 GstElement *first_converter;
40 GstElement *last_converter;
43 gboolean is_rendering_smartly;
46 G_DEFINE_TYPE_WITH_PRIVATE (GESSource, ges_source, GES_TYPE_TRACK_ELEMENT);
48 /******************************
49 * Internal helper methods *
50 ******************************/
52 link_elements (GstElement * bin, GPtrArray * elements)
54 GstElement *element, *prev = NULL, *first = NULL;
57 for (i = 0; i < elements->len; i++) {
58 element = elements->pdata[i];
62 gst_bin_add (GST_BIN (bin), element);
64 if (!gst_element_link_pads_full (prev, "src", element, "sink",
65 GST_PAD_LINK_CHECK_NOTHING)) {
66 if (!gst_element_link (prev, element)) {
67 g_error ("Could not link %s and %s", GST_OBJECT_NAME (prev),
68 GST_OBJECT_NAME (element));
81 _set_ghost_pad_target (GESSource * self, GstPad * srcpad, GstElement * element)
83 GstPadLinkReturn link_return;
84 GESSourcePrivate *priv = self->priv;
85 GESSourceClass *source_klass = GES_SOURCE_GET_CLASS (self);
86 gboolean use_converter = ! !priv->first_converter;
88 if (source_klass->select_pad && !source_klass->select_pad (self, srcpad)) {
89 GST_INFO_OBJECT (self, "Ignoring pad %" GST_PTR_FORMAT, srcpad);
94 if (use_converter && priv->is_rendering_smartly) {
95 GstPad *pad = gst_element_get_static_pad (priv->first_converter, "sink");
96 use_converter = gst_pad_can_link (srcpad, pad);
97 gst_object_unref (pad);
101 GstPad *converter_src, *sinkpad;
103 converter_src = gst_element_get_static_pad (priv->last_converter, "src");
104 if (!gst_ghost_pad_set_target (GST_GHOST_PAD (priv->ghostpad),
106 GST_ERROR_OBJECT (self, "Could not set ghost target");
109 sinkpad = gst_element_get_static_pad (priv->first_converter, "sink");
110 link_return = gst_pad_link (srcpad, sinkpad);
111 #ifndef GST_DISABLE_GST_DEBUG
112 if (link_return != GST_PAD_LINK_OK) {
113 GstCaps *srccaps = NULL;
114 GstCaps *sinkcaps = NULL;
116 srccaps = gst_pad_query_caps (srcpad, NULL);
117 sinkcaps = gst_pad_query_caps (sinkpad, NULL);
119 GST_ERROR_OBJECT (element, "Could not link source with "
120 "conversion bin: %s (srcpad caps %" GST_PTR_FORMAT
121 " sinkpad caps: %" GST_PTR_FORMAT ")",
122 gst_pad_link_get_name (link_return), srccaps, sinkcaps);
123 gst_caps_unref (srccaps);
124 gst_caps_unref (sinkcaps);
128 gst_object_unref (converter_src);
129 gst_object_unref (sinkpad);
131 if (!gst_ghost_pad_set_target (GST_GHOST_PAD (priv->ghostpad), srcpad))
132 GST_ERROR_OBJECT (self, "Could not set ghost target");
135 gst_element_no_more_pads (element);
138 /* @elements: (transfer-full) */
140 ges_source_create_topbin (GESSource * source, const gchar * bin_name,
141 GstElement * sub_element, GPtrArray * elements)
146 GESSourcePrivate *priv = source->priv;
148 bin = gst_bin_new (bin_name);
149 if (!gst_bin_add (GST_BIN (bin), sub_element)) {
150 GST_ERROR_OBJECT (source, "Could not add sub element: %" GST_PTR_FORMAT,
152 gst_object_unref (bin);
156 priv->ghostpad = gst_object_ref (gst_ghost_pad_new_no_target ("src",
158 gst_pad_set_active (priv->ghostpad, TRUE);
159 gst_element_add_pad (bin, priv->ghostpad);
160 priv->topbin = gst_object_ref (bin);
161 last = link_elements (bin, elements);
165 while (!elements->pdata[i])
168 priv->first_converter = gst_object_ref (elements->pdata[i]);
169 priv->last_converter = gst_object_ref (last);
172 sub_srcpad = gst_element_get_static_pad (sub_element, "src");
174 _set_ghost_pad_target (source, sub_srcpad, sub_element);
175 gst_object_unref (sub_srcpad);
177 GST_INFO_OBJECT (source, "Waiting for pad added");
178 g_signal_connect_swapped (sub_element, "pad-added",
179 G_CALLBACK (_set_ghost_pad_target), source);
181 g_ptr_array_free (elements, TRUE);
188 ges_source_set_rendering_smartly (GESSource * source,
189 gboolean is_rendering_smartly)
192 if (is_rendering_smartly) {
193 GESTrack *track = ges_track_element_get_track (GES_TRACK_ELEMENT (source));
195 if (track && ges_track_get_mixing (track)) {
196 GST_DEBUG_OBJECT (source, "Not rendering smartly as track is mixing!");
198 source->priv->is_rendering_smartly = FALSE;
202 source->priv->is_rendering_smartly = is_rendering_smartly;
206 ges_source_get_rendering_smartly (GESSource * source)
208 return source->priv->is_rendering_smartly;
212 ges_source_dispose (GObject * object)
214 GESSourcePrivate *priv = GES_SOURCE (object)->priv;
216 gst_clear_object (&priv->first_converter);
217 gst_clear_object (&priv->last_converter);
218 gst_clear_object (&priv->topbin);
219 gst_clear_object (&priv->ghostpad);
221 G_OBJECT_CLASS (ges_source_parent_class)->dispose (object);
225 ges_source_class_init (GESSourceClass * klass)
227 GESTrackElementClass *track_class = GES_TRACK_ELEMENT_CLASS (klass);
228 GObjectClass *object_class = G_OBJECT_CLASS (klass);
230 track_class->nleobject_factorytype = "nlesource";
231 track_class->create_element = NULL;
232 object_class->dispose = ges_source_dispose;
234 GES_TRACK_ELEMENT_CLASS_DEFAULT_HAS_INTERNAL_SOURCE (klass) = TRUE;
238 ges_source_init (GESSource * self)
240 self->priv = ges_source_get_instance_private (self);