2 * Copyright (C) <2007> Wim Taymans <wim.taymans@gmail.com>
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 details.
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.
27 #include <gst/audio/audio.h>
29 #include "gstrtpg722depay.h"
30 #include "gstrtpchannels.h"
32 GST_DEBUG_CATEGORY_STATIC (rtpg722depay_debug);
33 #define GST_CAT_DEFAULT (rtpg722depay_debug)
35 static GstStaticPadTemplate gst_rtp_g722_depay_src_template =
36 GST_STATIC_PAD_TEMPLATE ("src",
39 GST_STATIC_CAPS ("audio/G722, "
40 "rate = (int) [ 1, MAX ], " "channels = (int) [ 1, MAX ]")
43 static GstStaticPadTemplate gst_rtp_g722_depay_sink_template =
44 GST_STATIC_PAD_TEMPLATE ("sink",
47 GST_STATIC_CAPS ("application/x-rtp, "
48 "media = (string) \"audio\", " "clock-rate = (int) 8000, "
49 /* "channels = (int) [1, MAX]" */
50 /* "channel-order = (string) ANY" */
51 "encoding-name = (string) \"G722\";"
53 "media = (string) \"audio\", "
54 "payload = (int) " GST_RTP_PAYLOAD_G722_STRING ", "
55 "clock-rate = (int) [ 1, MAX ]"
56 /* "channels = (int) [1, MAX]" */
57 /* "emphasis = (string) ANY" */
58 /* "channel-order = (string) ANY" */
62 #define gst_rtp_g722_depay_parent_class parent_class
63 G_DEFINE_TYPE (GstRtpG722Depay, gst_rtp_g722_depay,
64 GST_TYPE_RTP_BASE_DEPAYLOAD);
66 static gboolean gst_rtp_g722_depay_setcaps (GstRTPBaseDepayload * depayload,
68 static GstBuffer *gst_rtp_g722_depay_process (GstRTPBaseDepayload * depayload,
72 gst_rtp_g722_depay_class_init (GstRtpG722DepayClass * klass)
74 GstElementClass *gstelement_class;
75 GstRTPBaseDepayloadClass *gstrtpbasedepayload_class;
77 GST_DEBUG_CATEGORY_INIT (rtpg722depay_debug, "rtpg722depay", 0,
78 "G722 RTP Depayloader");
80 gstelement_class = (GstElementClass *) klass;
81 gstrtpbasedepayload_class = (GstRTPBaseDepayloadClass *) klass;
83 gst_element_class_add_pad_template (gstelement_class,
84 gst_static_pad_template_get (&gst_rtp_g722_depay_src_template));
85 gst_element_class_add_pad_template (gstelement_class,
86 gst_static_pad_template_get (&gst_rtp_g722_depay_sink_template));
88 gst_element_class_set_static_metadata (gstelement_class,
89 "RTP audio depayloader", "Codec/Depayloader/Network/RTP",
90 "Extracts G722 audio from RTP packets",
91 "Wim Taymans <wim.taymans@gmail.com>");
93 gstrtpbasedepayload_class->set_caps = gst_rtp_g722_depay_setcaps;
94 gstrtpbasedepayload_class->process = gst_rtp_g722_depay_process;
98 gst_rtp_g722_depay_init (GstRtpG722Depay * rtpg722depay)
103 gst_rtp_g722_depay_parse_int (GstStructure * structure, const gchar * field,
109 if ((str = gst_structure_get_string (structure, field)))
112 if (gst_structure_get_int (structure, field, &res))
119 gst_rtp_g722_depay_setcaps (GstRTPBaseDepayload * depayload, GstCaps * caps)
121 GstStructure *structure;
122 GstRtpG722Depay *rtpg722depay;
123 gint clock_rate, payload, samplerate;
128 const gchar *channel_order;
129 const GstRTPChannelOrder *order;
132 rtpg722depay = GST_RTP_G722_DEPAY (depayload);
134 structure = gst_caps_get_structure (caps, 0);
137 gst_structure_get_int (structure, "payload", &payload);
139 case GST_RTP_PAYLOAD_G722:
145 /* no fixed mapping, we need clock-rate */
152 /* caps can overwrite defaults */
154 gst_rtp_g722_depay_parse_int (structure, "clock-rate", clock_rate);
158 if (clock_rate == 8000)
162 samplerate = clock_rate;
165 gst_rtp_g722_depay_parse_int (structure, "encoding-params", channels);
167 channels = gst_rtp_g722_depay_parse_int (structure, "channels", channels);
169 /* channels defaults to 1 otherwise */
174 depayload->clock_rate = clock_rate;
175 rtpg722depay->rate = samplerate;
176 rtpg722depay->channels = channels;
178 srccaps = gst_caps_new_simple ("audio/G722",
179 "rate", G_TYPE_INT, samplerate, "channels", G_TYPE_INT, channels, NULL);
181 /* FIXME: Do something with the channel order */
183 /* add channel positions */
184 channel_order = gst_structure_get_string (structure, "channel-order");
186 order = gst_rtp_channels_get_by_order (channels, channel_order);
188 gst_audio_set_channel_positions (gst_caps_get_structure (srccaps, 0),
191 GstAudioChannelPosition *pos;
193 GST_ELEMENT_WARNING (rtpg722depay, STREAM, DECODE,
194 (NULL), ("Unknown channel order '%s' for %d channels",
195 GST_STR_NULL (channel_order), channels));
196 /* create default NONE layout */
197 pos = gst_rtp_channels_create_default (channels);
198 gst_audio_set_channel_positions (gst_caps_get_structure (srccaps, 0), pos);
203 res = gst_pad_set_caps (depayload->srcpad, srccaps);
204 gst_caps_unref (srccaps);
211 GST_ERROR_OBJECT (depayload, "no clock-rate specified");
217 gst_rtp_g722_depay_process (GstRTPBaseDepayload * depayload, GstBuffer * buf)
219 GstRtpG722Depay *rtpg722depay;
223 GstRTPBuffer rtp = { NULL };
225 rtpg722depay = GST_RTP_G722_DEPAY (depayload);
227 gst_rtp_buffer_map (buf, GST_MAP_READ, &rtp);
229 payload_len = gst_rtp_buffer_get_payload_len (&rtp);
231 if (payload_len <= 0)
234 GST_DEBUG_OBJECT (rtpg722depay, "got payload of %d bytes", payload_len);
236 outbuf = gst_rtp_buffer_get_payload_buffer (&rtp);
237 marker = gst_rtp_buffer_get_marker (&rtp);
238 gst_rtp_buffer_unmap (&rtp);
240 if (marker && outbuf) {
241 /* mark talk spurt with RESYNC */
242 GST_BUFFER_FLAG_SET (outbuf, GST_BUFFER_FLAG_RESYNC);
250 GST_ELEMENT_WARNING (rtpg722depay, STREAM, DECODE,
251 ("Empty Payload."), (NULL));
252 gst_rtp_buffer_unmap (&rtp);
258 gst_rtp_g722_depay_plugin_init (GstPlugin * plugin)
260 return gst_element_register (plugin, "rtpg722depay",
261 GST_RANK_SECONDARY, GST_TYPE_RTP_G722_DEPAY);