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
|
/* RTP DTMF muxer element for GStreamer
*
* gstrtpdtmfmux.c:
*
* Copyright (C) <2007> Nokia Corporation.
* Contact: Zeeshan Ali <zeeshan.ali@nokia.com>
* Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
* 2000,2005 Wim Taymans <wim@fluendo.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., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
/**
* SECTION:element-rtpdtmfmux
* @short_description: Muxer that takes one or several RTP streams
* and muxes them to a single rtp stream.
*
* <refsect2>
* </refsect2>
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <gst/gst.h>
#include <gstrtpdtmfmux.h>
#include <string.h>
GST_DEBUG_CATEGORY_STATIC (gst_rtp_dtmf_mux_debug);
#define GST_CAT_DEFAULT gst_rtp_dtmf_mux_debug
/* elementfactory information */
static const GstElementDetails gst_rtp_dtmf_mux_details =
GST_ELEMENT_DETAILS ("RTP muxer",
"Codec/Muxer",
"mixes RTP DTMF streams into other RTP streams",
"Zeeshan Ali <first.last@nokia.com>");
static void gst_rtp_dtmf_mux_base_init (gpointer g_class);
static void gst_rtp_dtmf_mux_class_init (GstRTPDTMFMuxClass * klass);
static void gst_rtp_dtmf_mux_finalize (GObject * object);
static gboolean gst_rtp_dtmf_mux_sink_event (GstPad * pad,
GstEvent * event);
static GstFlowReturn gst_rtp_dtmf_mux_chain (GstPad * pad,
GstBuffer * buffer);
static GstRTPMuxClass *parent_class = NULL;
GType
gst_rtp_dtmf_mux_get_type (void)
{
static GType mux_type = 0;
if (!mux_type) {
static const GTypeInfo mux_info = {
sizeof (GstRTPDTMFMuxClass),
gst_rtp_dtmf_mux_base_init,
NULL,
(GClassInitFunc) gst_rtp_dtmf_mux_class_init,
NULL,
NULL,
sizeof (GstRTPDTMFMux),
0,
(GInstanceInitFunc) NULL,
};
mux_type =
g_type_register_static (GST_TYPE_RTP_MUX, "GstRTPDTMFMux",
&mux_info, 0);
}
return mux_type;
}
static void
gst_rtp_dtmf_mux_base_init (gpointer g_class)
{
GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
gst_element_class_set_details (element_class, &gst_rtp_dtmf_mux_details);
}
static void
gst_rtp_dtmf_mux_class_init (GstRTPDTMFMuxClass * klass)
{
GObjectClass *gobject_class;
GstElementClass *gstelement_class;
GstRTPMuxClass *gstrtpmux_class;
gobject_class = (GObjectClass *) klass;
gstelement_class = (GstElementClass *) klass;
gstrtpmux_class = (GstRTPMuxClass *) klass;
parent_class = g_type_class_peek_parent (klass);
gobject_class->finalize = gst_rtp_dtmf_mux_finalize;
gstrtpmux_class->chain_func = gst_rtp_dtmf_mux_chain;
gstrtpmux_class->sink_event_func = gst_rtp_dtmf_mux_sink_event;
}
static void
gst_rtp_dtmf_mux_finalize (GObject * object)
{
GstRTPDTMFMux *mux;
mux = GST_RTP_DTMF_MUX (object);
G_OBJECT_CLASS (parent_class)->finalize (object);
}
static GstFlowReturn
gst_rtp_dtmf_mux_chain (GstPad * pad, GstBuffer * buffer)
{
GstRTPDTMFMux *mux;
gboolean drop = FALSE;
GstFlowReturn ret;
mux = GST_RTP_DTMF_MUX (gst_pad_get_parent (pad));
GST_OBJECT_LOCK (mux);
if (mux->special_pad != NULL &&
mux->special_pad != pad) {
drop = TRUE;
}
if (drop) {
gst_buffer_unref (buffer);
ret = GST_FLOW_OK;
GST_OBJECT_UNLOCK (mux);
}
else {
GST_OBJECT_UNLOCK (mux);
if (parent_class->chain_func)
ret = parent_class->chain_func (pad, buffer);
else
ret = GST_FLOW_ERROR;
}
gst_object_unref (mux);
return ret;
}
static gboolean
gst_rtp_dtmf_mux_sink_event (GstPad * pad, GstEvent * event)
{
GstRTPDTMFMux *mux;
GstEventType type;
gboolean ret = FALSE;
type = event ? GST_EVENT_TYPE (event) : GST_EVENT_UNKNOWN;
mux = (GstRTPDTMFMux *) gst_pad_get_parent (pad);
switch (type) {
case GST_EVENT_CUSTOM_DOWNSTREAM_OOB:
{
const GstStructure *structure;
structure = gst_event_get_structure (event);
/* FIXME: is this event generic enough to be given a generic name? */
if (structure && gst_structure_has_name (structure, "stream-lock")) {
gboolean lock;
if (!gst_structure_get_boolean (structure, "lock", &lock))
break;
GST_OBJECT_LOCK (mux);
if (lock) {
if (mux->special_pad != NULL) {
GST_WARNING_OBJECT (mux,
"Stream lock already acquired by pad %s",
GST_ELEMENT_NAME (mux->special_pad));
}
else
mux->special_pad = gst_object_ref (pad);
}
else {
if (mux->special_pad == NULL) {
GST_WARNING_OBJECT (mux,
"Stream lock not acquired, can't release it");
}
else if (pad != mux->special_pad) {
GST_WARNING_OBJECT (mux,
"pad %s attempted to release Stream lock"
" which was acquired by pad %s", GST_ELEMENT_NAME (pad),
GST_ELEMENT_NAME (mux->special_pad));
}
else {
gst_object_unref (mux->special_pad);
mux->special_pad = NULL;
}
}
GST_OBJECT_UNLOCK (mux);
}
ret = TRUE;
break;
}
default:
{
if (parent_class->sink_event_func) {
/* Give the parent a chance to handle the event first */
ret = parent_class->sink_event_func (pad, event);
}
else
ret = gst_pad_event_default (pad, event);
break;
}
}
gst_object_unref (mux);
return ret;
}
gboolean
gst_rtp_dtmf_mux_plugin_init (GstPlugin * plugin)
{
GST_DEBUG_CATEGORY_INIT (gst_rtp_dtmf_mux_debug, "rtpdtmfmux", 0,
"rtp dtmf muxer");
return gst_element_register (plugin, "rtpdtmfmux", GST_RANK_NONE,
GST_TYPE_RTP_DTMF_MUX);
}
|
