2 * Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
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.
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
16 #include "gstrtpL16parse.h"
17 #include "gstrtp-common.h"
19 /* elementfactory information */
20 static GstElementDetails gst_rtp_L16parse_details = {
24 "Extracts raw audio from RTP packets",
26 "Zeeshan Ali <zak147@yahoo.com>",
30 /* RtpL16Parse signals and args */
44 GST_PAD_TEMPLATE_FACTORY (src_factory,
51 "format", GST_PROPS_STRING ("int"),
52 "law", GST_PROPS_INT (0),
53 "endianness", GST_PROPS_INT (G_BYTE_ORDER),
54 "signed", GST_PROPS_BOOLEAN (TRUE),
55 "width", GST_PROPS_INT (16),
56 "depth", GST_PROPS_INT (16),
57 "rate", GST_PROPS_INT_RANGE (1000, 48000),
58 "channels", GST_PROPS_INT_RANGE (1, 2))
61 GST_PAD_TEMPLATE_FACTORY (sink_factory,
71 static void gst_rtpL16parse_class_init (GstRtpL16ParseClass * klass);
72 static void gst_rtpL16parse_init (GstRtpL16Parse * rtpL16parse);
74 static void gst_rtpL16parse_chain (GstPad * pad, GstBuffer * buf);
76 static void gst_rtpL16parse_set_property (GObject * object, guint prop_id,
77 const GValue * value, GParamSpec * pspec);
78 static void gst_rtpL16parse_get_property (GObject * object, guint prop_id,
79 GValue * value, GParamSpec * pspec);
80 static GstElementStateReturn gst_rtpL16parse_change_state (GstElement * element);
82 static GstElementClass *parent_class = NULL;
84 static GType gst_rtpL16parse_get_type (void)
86 static GType rtpL16parse_type = 0;
88 if (!rtpL16parse_type) {
89 static const GTypeInfo rtpL16parse_info = {
90 sizeof (GstRtpL16ParseClass),
93 (GClassInitFunc) gst_rtpL16parse_class_init,
96 sizeof (GstRtpL16Parse),
98 (GInstanceInitFunc) gst_rtpL16parse_init,
101 rtpL16parse_type = g_type_register_static (GST_TYPE_ELEMENT, "GstRtpL16Parse", &rtpL16parse_info, 0);
103 return rtpL16parse_type;
107 gst_rtpL16parse_class_init (GstRtpL16ParseClass * klass)
109 GObjectClass *gobject_class;
110 GstElementClass *gstelement_class;
112 gobject_class = (GObjectClass *) klass;
113 gstelement_class = (GstElementClass *) klass;
115 parent_class = g_type_class_ref (GST_TYPE_ELEMENT);
117 g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_PAYLOAD_TYPE,
118 g_param_spec_int ("payload_type", "payload_type", "payload type",
119 G_MININT, G_MAXINT, PAYLOAD_L16_STEREO, G_PARAM_READABLE));
120 g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_FREQUENCY,
121 g_param_spec_int ("frequency", "frequency", "frequency",
122 G_MININT, G_MAXINT, 44100, G_PARAM_READWRITE));
124 gobject_class->set_property = gst_rtpL16parse_set_property;
125 gobject_class->get_property = gst_rtpL16parse_get_property;
127 gstelement_class->change_state = gst_rtpL16parse_change_state;
131 gst_rtpL16parse_init (GstRtpL16Parse * rtpL16parse)
133 rtpL16parse->srcpad = gst_pad_new_from_template (GST_PAD_TEMPLATE_GET (src_factory), "src");
134 rtpL16parse->sinkpad = gst_pad_new_from_template (GST_PAD_TEMPLATE_GET (sink_factory), "sink");
135 gst_element_add_pad (GST_ELEMENT (rtpL16parse), rtpL16parse->srcpad);
136 gst_element_add_pad (GST_ELEMENT (rtpL16parse), rtpL16parse->sinkpad);
137 gst_pad_set_chain_function (rtpL16parse->sinkpad, gst_rtpL16parse_chain);
139 rtpL16parse->frequency = 44100;
140 rtpL16parse->channels = 2;
142 rtpL16parse->payload_type = PAYLOAD_L16_STEREO;
146 gst_rtpL16parse_ntohs (GstBuffer *buf)
150 /* FIXME: is this code correct or even sane at all? */
151 i = (guint16 *) GST_BUFFER_DATA(buf);
152 len = i + GST_BUFFER_SIZE (buf) / sizeof (guint16 *);
160 gst_rtpL16_caps_nego (GstRtpL16Parse *rtpL16parse)
164 caps = GST_CAPS_NEW (
167 "format", GST_PROPS_STRING ("int"),
168 "law", GST_PROPS_INT (0),
169 "endianness", GST_PROPS_INT (G_BYTE_ORDER),
170 "signed", GST_PROPS_BOOLEAN (TRUE),
171 "width", GST_PROPS_INT (16),
172 "depth", GST_PROPS_INT (16),
173 "rate", GST_PROPS_INT (rtpL16parse->frequency),
174 "channels", GST_PROPS_INT (rtpL16parse->channels));
176 gst_pad_try_set_caps (rtpL16parse->srcpad, caps);
180 gst_rtpL16parse_payloadtype_change (GstRtpL16Parse *rtpL16parse, rtp_payload_t pt)
182 rtpL16parse->payload_type = pt;
185 case PAYLOAD_L16_MONO:
186 rtpL16parse->channels = 1;
188 case PAYLOAD_L16_STEREO:
189 rtpL16parse->channels = 2;
192 g_warning ("unkown payload_t %d\n", pt);
195 gst_rtpL16_caps_nego (rtpL16parse);
199 gst_rtpL16parse_chain (GstPad * pad, GstBuffer * buf)
201 GstRtpL16Parse *rtpL16parse;
206 g_return_if_fail (pad != NULL);
207 g_return_if_fail (GST_IS_PAD (pad));
208 g_return_if_fail (buf != NULL);
210 rtpL16parse = GST_RTP_L16_PARSE (GST_OBJECT_PARENT (pad));
212 g_return_if_fail (rtpL16parse != NULL);
213 g_return_if_fail (GST_IS_RTP_L16_PARSE (rtpL16parse));
215 if (GST_IS_EVENT (buf)) {
216 GstEvent *event = GST_EVENT (buf);
217 gst_pad_event_default (pad, event);
222 if (GST_PAD_CAPS (rtpL16parse->srcpad) == NULL) {
223 gst_rtpL16_caps_nego (rtpL16parse);
226 packet = rtp_packet_new_copy_data (GST_BUFFER_DATA (buf), GST_BUFFER_SIZE (buf));
228 pt = rtp_packet_get_payload_type (packet);
230 if (pt != rtpL16parse->payload_type) {
231 gst_rtpL16parse_payloadtype_change (rtpL16parse, pt);
234 outbuf = gst_buffer_new ();
235 GST_BUFFER_SIZE (outbuf) = rtp_packet_get_payload_len (packet);
236 GST_BUFFER_DATA (outbuf) = g_malloc (GST_BUFFER_SIZE (outbuf));
237 GST_BUFFER_TIMESTAMP (outbuf) = g_ntohl (rtp_packet_get_timestamp (packet)) * GST_SECOND;
239 memcpy (GST_BUFFER_DATA (outbuf), rtp_packet_get_payload (packet), GST_BUFFER_SIZE (outbuf));
241 GST_DEBUG (0,"gst_rtpL16parse_chain: pushing buffer of size %d", GST_BUFFER_SIZE(outbuf));
243 /* FIXME: According to RFC 1890, this is required, right? */
244 #if G_BYTE_ORDER == G_LITTLE_ENDIAN
245 gst_rtpL16parse_ntohs (outbuf);
248 gst_pad_push (rtpL16parse->srcpad, outbuf);
250 rtp_packet_free (packet);
251 gst_buffer_unref (buf);
255 gst_rtpL16parse_set_property (GObject * object, guint prop_id, const GValue * value, GParamSpec * pspec)
257 GstRtpL16Parse *rtpL16parse;
259 /* it's not null if we got it, but it might not be ours */
260 g_return_if_fail (GST_IS_RTP_L16_PARSE (object));
261 rtpL16parse = GST_RTP_L16_PARSE (object);
264 case ARG_PAYLOAD_TYPE:
265 gst_rtpL16parse_payloadtype_change (rtpL16parse, g_value_get_int (value));
268 rtpL16parse->frequency = g_value_get_int (value);
276 gst_rtpL16parse_get_property (GObject * object, guint prop_id, GValue * value, GParamSpec * pspec)
278 GstRtpL16Parse *rtpL16parse;
280 /* it's not null if we got it, but it might not be ours */
281 g_return_if_fail (GST_IS_RTP_L16_PARSE (object));
282 rtpL16parse = GST_RTP_L16_PARSE (object);
285 case ARG_PAYLOAD_TYPE:
286 g_value_set_int (value, rtpL16parse->payload_type);
289 g_value_set_int (value, rtpL16parse->frequency);
292 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
297 static GstElementStateReturn
298 gst_rtpL16parse_change_state (GstElement * element)
300 GstRtpL16Parse *rtpL16parse;
302 g_return_val_if_fail (GST_IS_RTP_L16_PARSE (element), GST_STATE_FAILURE);
304 rtpL16parse = GST_RTP_L16_PARSE (element);
306 GST_DEBUG (0, "state pending %d\n", GST_STATE_PENDING (element));
308 switch (GST_STATE_TRANSITION (element)) {
309 case GST_STATE_NULL_TO_READY:
311 case GST_STATE_READY_TO_NULL:
317 /* if we haven't failed already, give the parent class a chance to ;-) */
318 if (GST_ELEMENT_CLASS (parent_class)->change_state)
319 return GST_ELEMENT_CLASS (parent_class)->change_state (element);
321 return GST_STATE_SUCCESS;
325 gst_rtpL16parse_plugin_init (GModule * module, GstPlugin * plugin)
327 GstElementFactory *rtpL16parse;
329 rtpL16parse = gst_element_factory_new ("rtpL16parse", GST_TYPE_RTP_L16_PARSE, &gst_rtp_L16parse_details);
330 g_return_val_if_fail (rtpL16parse != NULL, FALSE);
332 gst_element_factory_add_pad_template (rtpL16parse, GST_PAD_TEMPLATE_GET (src_factory));
333 gst_element_factory_add_pad_template (rtpL16parse, GST_PAD_TEMPLATE_GET (sink_factory));
335 gst_plugin_add_feature (plugin, GST_PLUGIN_FEATURE (rtpL16parse));