1 /* GStreamer
2 * Copyright (C) <2006> Philippe Khalaf <burger@speedy.org>
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 #ifdef HAVE_CONFIG_H
21 # include "config.h"
22 #endif
23
24 #include <string.h>
25 #include <stdlib.h>
26 #include <gst/rtp/gstrtpbuffer.h>
27 #include <gst/audio/audio.h>
28 #include "gstrtpilbcdepay.h"
29 #include "gstrtputils.h"
30
31 /* RtpiLBCDepay signals and args */
32 enum
33 {
34 /* FILL ME */
35 LAST_SIGNAL
36 };
37
38 #define DEFAULT_MODE GST_ILBC_MODE_30
39
40 enum
41 {
42 PROP_0,
43 PROP_MODE
44 };
45
46 /* FIXME, mode should be string because it is a parameter in SDP fmtp */
47 static GstStaticPadTemplate gst_rtp_ilbc_depay_sink_template =
48 GST_STATIC_PAD_TEMPLATE ("sink",
49 GST_PAD_SINK,
50 GST_PAD_ALWAYS,
51 GST_STATIC_CAPS ("application/x-rtp, "
52 "media = (string) \"audio\", "
53 "clock-rate = (int) 8000, " "encoding-name = (string) \"ILBC\"")
54 /* "mode = (string) { \"20\", \"30\" }" */
55 );
56
57 static GstStaticPadTemplate gst_rtp_ilbc_depay_src_template =
58 GST_STATIC_PAD_TEMPLATE ("src",
59 GST_PAD_SRC,
60 GST_PAD_ALWAYS,
61 GST_STATIC_CAPS ("audio/x-iLBC, " "mode = (int) { 20, 30 }")
62 );
63
64 static void gst_ilbc_depay_set_property (GObject * object,
65 guint prop_id, const GValue * value, GParamSpec * pspec);
66 static void gst_ilbc_depay_get_property (GObject * object,
67 guint prop_id, GValue * value, GParamSpec * pspec);
68
69 static GstBuffer *gst_rtp_ilbc_depay_process (GstRTPBaseDepayload * depayload,
70 GstRTPBuffer * rtp);
71 static gboolean gst_rtp_ilbc_depay_setcaps (GstRTPBaseDepayload * depayload,
72 GstCaps * caps);
73
74 #define gst_rtp_ilbc_depay_parent_class parent_class
75 G_DEFINE_TYPE (GstRTPiLBCDepay, gst_rtp_ilbc_depay,
76 GST_TYPE_RTP_BASE_DEPAYLOAD);
77
78 #define GST_TYPE_ILBC_MODE (gst_ilbc_mode_get_type())
79 static GType
gst_ilbc_mode_get_type(void)80 gst_ilbc_mode_get_type (void)
81 {
82 static GType ilbc_mode_type = 0;
83 static const GEnumValue ilbc_modes[] = {
84 {GST_ILBC_MODE_20, "20ms frames", "20ms"},
85 {GST_ILBC_MODE_30, "30ms frames", "30ms"},
86 {0, NULL, NULL},
87 };
88
89 if (!ilbc_mode_type) {
90 ilbc_mode_type = g_enum_register_static ("iLBCMode", ilbc_modes);
91 }
92 return ilbc_mode_type;
93 }
94
95 static void
gst_rtp_ilbc_depay_class_init(GstRTPiLBCDepayClass * klass)96 gst_rtp_ilbc_depay_class_init (GstRTPiLBCDepayClass * klass)
97 {
98 GObjectClass *gobject_class;
99 GstElementClass *gstelement_class;
100 GstRTPBaseDepayloadClass *gstrtpbasedepayload_class;
101
102 gobject_class = (GObjectClass *) klass;
103 gstelement_class = (GstElementClass *) klass;
104 gstrtpbasedepayload_class = (GstRTPBaseDepayloadClass *) klass;
105
106 gobject_class->set_property = gst_ilbc_depay_set_property;
107 gobject_class->get_property = gst_ilbc_depay_get_property;
108
109 /* FIXME, mode is in the caps */
110 g_object_class_install_property (gobject_class, PROP_MODE,
111 g_param_spec_enum ("mode", "Mode", "iLBC frame mode",
112 GST_TYPE_ILBC_MODE, DEFAULT_MODE,
113 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
114
115 gst_element_class_add_static_pad_template (gstelement_class,
116 &gst_rtp_ilbc_depay_src_template);
117 gst_element_class_add_static_pad_template (gstelement_class,
118 &gst_rtp_ilbc_depay_sink_template);
119
120 gst_element_class_set_static_metadata (gstelement_class,
121 "RTP iLBC depayloader", "Codec/Depayloader/Network/RTP",
122 "Extracts iLBC audio from RTP packets (RFC 3952)",
123 "Philippe Kalaf <philippe.kalaf@collabora.co.uk>");
124
125 gstrtpbasedepayload_class->process_rtp_packet = gst_rtp_ilbc_depay_process;
126 gstrtpbasedepayload_class->set_caps = gst_rtp_ilbc_depay_setcaps;
127 }
128
129 static void
gst_rtp_ilbc_depay_init(GstRTPiLBCDepay * rtpilbcdepay)130 gst_rtp_ilbc_depay_init (GstRTPiLBCDepay * rtpilbcdepay)
131 {
132 /* Set default mode */
133 rtpilbcdepay->mode = DEFAULT_MODE;
134 }
135
136 static gboolean
gst_rtp_ilbc_depay_setcaps(GstRTPBaseDepayload * depayload,GstCaps * caps)137 gst_rtp_ilbc_depay_setcaps (GstRTPBaseDepayload * depayload, GstCaps * caps)
138 {
139 GstRTPiLBCDepay *rtpilbcdepay = GST_RTP_ILBC_DEPAY (depayload);
140 GstCaps *srccaps;
141 GstStructure *structure;
142 const gchar *mode_str = NULL;
143 gint mode, clock_rate;
144 gboolean ret;
145
146 structure = gst_caps_get_structure (caps, 0);
147
148 mode = rtpilbcdepay->mode;
149
150 if (!gst_structure_get_int (structure, "clock-rate", &clock_rate))
151 clock_rate = 8000;
152 depayload->clock_rate = clock_rate;
153
154 /* parse mode, if we can */
155 mode_str = gst_structure_get_string (structure, "mode");
156 if (mode_str) {
157 mode = strtol (mode_str, NULL, 10);
158 if (mode != 20 && mode != 30)
159 mode = rtpilbcdepay->mode;
160 }
161
162 rtpilbcdepay->mode = mode;
163
164 srccaps = gst_caps_new_simple ("audio/x-iLBC",
165 "mode", G_TYPE_INT, rtpilbcdepay->mode, NULL);
166 ret = gst_pad_set_caps (GST_RTP_BASE_DEPAYLOAD_SRCPAD (depayload), srccaps);
167
168 GST_DEBUG ("set caps on source: %" GST_PTR_FORMAT " (ret=%d)", srccaps, ret);
169 gst_caps_unref (srccaps);
170
171 return ret;
172 }
173
174 static GstBuffer *
gst_rtp_ilbc_depay_process(GstRTPBaseDepayload * depayload,GstRTPBuffer * rtp)175 gst_rtp_ilbc_depay_process (GstRTPBaseDepayload * depayload, GstRTPBuffer * rtp)
176 {
177 GstBuffer *outbuf;
178 gboolean marker;
179
180 marker = gst_rtp_buffer_get_marker (rtp);
181
182 GST_DEBUG ("process : got %" G_GSIZE_FORMAT " bytes, mark %d ts %u seqn %d",
183 gst_buffer_get_size (rtp->buffer), marker,
184 gst_rtp_buffer_get_timestamp (rtp), gst_rtp_buffer_get_seq (rtp));
185
186 outbuf = gst_rtp_buffer_get_payload_buffer (rtp);
187
188 if (marker && outbuf) {
189 /* mark start of talkspurt with RESYNC */
190 GST_BUFFER_FLAG_SET (outbuf, GST_BUFFER_FLAG_RESYNC);
191 }
192
193 if (outbuf) {
194 gst_rtp_drop_non_audio_meta (depayload, outbuf);
195 }
196
197 return outbuf;
198 }
199
200 static void
gst_ilbc_depay_set_property(GObject * object,guint prop_id,const GValue * value,GParamSpec * pspec)201 gst_ilbc_depay_set_property (GObject * object,
202 guint prop_id, const GValue * value, GParamSpec * pspec)
203 {
204 GstRTPiLBCDepay *rtpilbcdepay = GST_RTP_ILBC_DEPAY (object);
205
206 switch (prop_id) {
207 case PROP_MODE:
208 rtpilbcdepay->mode = g_value_get_enum (value);
209 break;
210 default:
211 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
212 break;
213 }
214 }
215
216 static void
gst_ilbc_depay_get_property(GObject * object,guint prop_id,GValue * value,GParamSpec * pspec)217 gst_ilbc_depay_get_property (GObject * object,
218 guint prop_id, GValue * value, GParamSpec * pspec)
219 {
220 GstRTPiLBCDepay *rtpilbcdepay = GST_RTP_ILBC_DEPAY (object);
221
222 switch (prop_id) {
223 case PROP_MODE:
224 g_value_set_enum (value, rtpilbcdepay->mode);
225 break;
226 default:
227 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
228 break;
229 }
230 }
231
232 gboolean
gst_rtp_ilbc_depay_plugin_init(GstPlugin * plugin)233 gst_rtp_ilbc_depay_plugin_init (GstPlugin * plugin)
234 {
235 return gst_element_register (plugin, "rtpilbcdepay",
236 GST_RANK_SECONDARY, GST_TYPE_RTP_ILBC_DEPAY);
237 }
238