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
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
|
/* GStreamer
* (c) 2005 Ronald S. Bultje <rbultje@ronald.bitfreak.net>
*
* 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., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <string.h>
#include "gstautoaudiosink.h"
#include "gstautodetect.h"
static GstElementStateReturn
gst_auto_audio_sink_change_state (GstElement * element);
GST_BOILERPLATE (GstAutoAudioSink, gst_auto_audio_sink, GstBin, GST_TYPE_BIN);
static void
gst_auto_audio_sink_base_init (gpointer klass)
{
GstElementClass *eklass = GST_ELEMENT_CLASS (klass);
GstElementDetails gst_auto_audio_sink_details = {
"Auto audio sink",
"Sink/Audio",
"Audio sink embedding the Auto-settings for audio output",
"Ronald Bultje <rbultje@ronald.bitfreak.net>"
};
GstStaticPadTemplate sink_template = GST_STATIC_PAD_TEMPLATE ("sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_STATIC_CAPS_ANY);
gst_element_class_add_pad_template (eklass,
gst_static_pad_template_get (&sink_template));
gst_element_class_set_details (eklass, &gst_auto_audio_sink_details);
}
static void
gst_auto_audio_sink_class_init (GstAutoAudioSinkClass * klass)
{
GstElementClass *eklass = GST_ELEMENT_CLASS (klass);
eklass->change_state = gst_auto_audio_sink_change_state;
}
/*
* Hack to make initial linking work; ideally, this'd work even when
* no target has been assigned to the ghostpad yet.
*/
static void
gst_auto_audio_sink_reset (GstAutoAudioSink * sink)
{
GstPad *targetpad;
/* fakesink placeholder */
if (sink->kid) {
gst_bin_remove (GST_BIN (sink), sink->kid);
}
sink->kid = gst_element_factory_make ("fakesink", "tempsink");
gst_bin_add (GST_BIN (sink), sink->kid);
/* pad */
targetpad = gst_element_get_pad (sink->kid, "sink");
gst_ghost_pad_set_target (GST_GHOST_PAD (sink->pad), targetpad);
gst_object_unref (targetpad);
}
static void
gst_auto_audio_sink_init (GstAutoAudioSink * sink)
{
sink->pad = gst_ghost_pad_new_notarget ("sink", GST_PAD_SINK);
gst_element_add_pad (GST_ELEMENT (sink), sink->pad);
gst_auto_audio_sink_reset (sink);
}
static gboolean
gst_auto_audio_sink_factory_filter (GstPluginFeature * feature, gpointer data)
{
guint rank;
const gchar *klass;
/* we only care about element factories */
if (!GST_IS_ELEMENT_FACTORY (feature))
return FALSE;
/* audio sinks */
klass = gst_element_factory_get_klass (GST_ELEMENT_FACTORY (feature));
if (strcmp (klass, "Sink/Audio") != 0)
return FALSE;
/* only select elements with autoplugging rank */
rank = gst_plugin_feature_get_rank (feature);
if (rank < GST_RANK_MARGINAL)
return FALSE;
return TRUE;
}
static gint
gst_auto_audio_sink_compare_ranks (GstPluginFeature * f1, GstPluginFeature * f2)
{
gint diff;
diff = gst_plugin_feature_get_rank (f2) - gst_plugin_feature_get_rank (f1);
if (diff != 0)
return diff;
return strcmp (gst_plugin_feature_get_name (f2),
gst_plugin_feature_get_name (f1));
}
static GstElement *
gst_auto_audio_sink_find_best (GstAutoAudioSink * sink)
{
GList *list, *item;
GstElement *choice = NULL;
gboolean ss = TRUE;
list = gst_registry_pool_feature_filter (
(GstPluginFeatureFilter) gst_auto_audio_sink_factory_filter, FALSE, sink);
list = g_list_sort (list, (GCompareFunc) gst_auto_audio_sink_compare_ranks);
/* FIXME:
* - soundservers have no priority yet.
* - soundserversinks should only be chosen if already running, or if
* the user explicitely wants this to run... That is not easy.
*/
while (1) {
GST_LOG ("Trying to find %s", ss ? "soundservers" : "audio devices");
for (item = list; item != NULL; item = item->next) {
GstElementFactory *f = GST_ELEMENT_FACTORY (item->data);
GstElement *el;
if ((el = gst_element_factory_create (f, "actual-sink"))) {
gboolean has_p = g_object_class_find_property (G_OBJECT_GET_CLASS (el),
"soundserver-running") ? TRUE : FALSE;
if (ss == has_p) {
if (ss) {
gboolean r;
g_object_get (G_OBJECT (el), "soundserver-running", &r, NULL);
if (r) {
GST_LOG ("%s - soundserver is running",
GST_PLUGIN_FEATURE (f)->name);
} else {
GST_LOG ("%s - Soundserver is not running",
GST_PLUGIN_FEATURE (f)->name);
goto next;
}
}
GST_LOG ("Testing %s", GST_PLUGIN_FEATURE (f)->name);
if (gst_element_set_state (el, GST_STATE_READY) == GST_STATE_SUCCESS) {
gst_element_set_state (el, GST_STATE_NULL);
GST_LOG ("This worked!");
choice = el;
goto done;
}
}
next:
gst_object_unref (GST_OBJECT (el));
}
}
if (!ss)
break;
ss = FALSE;
}
done:
g_list_free (list);
return choice;
}
static gboolean
gst_auto_audio_sink_detect (GstAutoAudioSink * sink)
{
GstElement *esink;
GstPad *targetpad;
if (sink->kid) {
gst_bin_remove (GST_BIN (sink), sink->kid);
sink->kid = NULL;
}
/* find element */
GST_DEBUG_OBJECT (sink, "Creating new kid");
if (!(esink = gst_auto_audio_sink_find_best (sink))) {
GST_ELEMENT_ERROR (sink, LIBRARY, INIT, (NULL),
("Failed to find a supported audio sink"));
return FALSE;
}
sink->kid = esink;
gst_bin_add (GST_BIN (sink), esink);
/* attach ghost pad */
GST_DEBUG_OBJECT (sink, "Re-assigning ghostpad");
targetpad = gst_element_get_pad (sink->kid, "sink");
gst_ghost_pad_set_target (GST_GHOST_PAD (sink->pad), targetpad);
gst_object_unref (targetpad);
GST_DEBUG_OBJECT (sink, "done changing auto audio sink");
return TRUE;
}
static GstElementStateReturn
gst_auto_audio_sink_change_state (GstElement * element)
{
GstAutoAudioSink *sink = GST_AUTO_AUDIO_SINK (element);
GST_DEBUG_OBJECT (element, "Change state 0x%x",
GST_STATE_TRANSITION (element));
switch (GST_STATE_TRANSITION (element)) {
case GST_STATE_NULL_TO_READY:
if (!gst_auto_audio_sink_detect (sink))
return GST_STATE_FAILURE;
break;
case GST_STATE_READY_TO_NULL:
gst_auto_audio_sink_reset (sink);
break;
default:
break;
}
return GST_ELEMENT_CLASS (parent_class)->change_state (element);
}
|
