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., 59 Temple Place - Suite 330,
17 * Boston, MA 02111-1307, 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\", "
49 "payload = (int) " GST_RTP_PAYLOAD_DYNAMIC_STRING ", "
50 "clock-rate = (int) 8000, "
51 /* "channels = (int) [1, MAX]" */
52 /* "channel-order = (string) ANY" */
53 "encoding-name = (string) \"G722\";"
55 "media = (string) \"audio\", "
56 "payload = (int) " GST_RTP_PAYLOAD_G722_STRING ", "
57 "clock-rate = (int) [ 1, MAX ]"
58 /* "channels = (int) [1, MAX]" */
59 /* "emphasis = (string) ANY" */
60 /* "channel-order = (string) ANY" */
64 #define gst_rtp_g722_depay_parent_class parent_class
65 G_DEFINE_TYPE (GstRtpG722Depay, gst_rtp_g722_depay,
66 GST_TYPE_RTP_BASE_DEPAYLOAD);
68 static gboolean gst_rtp_g722_depay_setcaps (GstRTPBaseDepayload * depayload,
70 static GstBuffer *gst_rtp_g722_depay_process (GstRTPBaseDepayload * depayload,
74 gst_rtp_g722_depay_class_init (GstRtpG722DepayClass * klass)
76 GstElementClass *gstelement_class;
77 GstRTPBaseDepayloadClass *gstrtpbasedepayload_class;
79 GST_DEBUG_CATEGORY_INIT (rtpg722depay_debug, "rtpg722depay", 0,
80 "G722 RTP Depayloader");
82 gstelement_class = (GstElementClass *) klass;
83 gstrtpbasedepayload_class = (GstRTPBaseDepayloadClass *) klass;
85 gst_element_class_add_pad_template (gstelement_class,
86 gst_static_pad_template_get (&gst_rtp_g722_depay_src_template));
87 gst_element_class_add_pad_template (gstelement_class,
88 gst_static_pad_template_get (&gst_rtp_g722_depay_sink_template));
90 gst_element_class_set_details_simple (gstelement_class,
91 "RTP audio depayloader", "Codec/Depayloader/Network/RTP",
92 "Extracts G722 audio from RTP packets",
93 "Wim Taymans <wim.taymans@gmail.com>");
95 gstrtpbasedepayload_class->set_caps = gst_rtp_g722_depay_setcaps;
96 gstrtpbasedepayload_class->process = gst_rtp_g722_depay_process;
100 gst_rtp_g722_depay_init (GstRtpG722Depay * rtpg722depay)
105 gst_rtp_g722_depay_parse_int (GstStructure * structure, const gchar * field,
111 if ((str = gst_structure_get_string (structure, field)))
114 if (gst_structure_get_int (structure, field, &res))
121 gst_rtp_g722_depay_setcaps (GstRTPBaseDepayload * depayload, GstCaps * caps)
123 GstStructure *structure;
124 GstRtpG722Depay *rtpg722depay;
125 gint clock_rate, payload, samplerate;
130 const gchar *channel_order;
131 const GstRTPChannelOrder *order;
134 rtpg722depay = GST_RTP_G722_DEPAY (depayload);
136 structure = gst_caps_get_structure (caps, 0);
139 gst_structure_get_int (structure, "payload", &payload);
141 case GST_RTP_PAYLOAD_G722:
147 /* no fixed mapping, we need clock-rate */
154 /* caps can overwrite defaults */
156 gst_rtp_g722_depay_parse_int (structure, "clock-rate", clock_rate);
160 if (clock_rate == 8000)
164 samplerate = clock_rate;
167 gst_rtp_g722_depay_parse_int (structure, "encoding-params", channels);
169 channels = gst_rtp_g722_depay_parse_int (structure, "channels", channels);
171 /* channels defaults to 1 otherwise */
176 depayload->clock_rate = clock_rate;
177 rtpg722depay->rate = samplerate;
178 rtpg722depay->channels = channels;
180 srccaps = gst_caps_new_simple ("audio/G722",
181 "rate", G_TYPE_INT, samplerate, "channels", G_TYPE_INT, channels, NULL);
183 /* FIXME: Do something with the channel order */
185 /* add channel positions */
186 channel_order = gst_structure_get_string (structure, "channel-order");
188 order = gst_rtp_channels_get_by_order (channels, channel_order);
190 gst_audio_set_channel_positions (gst_caps_get_structure (srccaps, 0),
193 GstAudioChannelPosition *pos;
195 GST_ELEMENT_WARNING (rtpg722depay, STREAM, DECODE,
196 (NULL), ("Unknown channel order '%s' for %d channels",
197 GST_STR_NULL (channel_order), channels));
198 /* create default NONE layout */
199 pos = gst_rtp_channels_create_default (channels);
200 gst_audio_set_channel_positions (gst_caps_get_structure (srccaps, 0), pos);
205 res = gst_pad_set_caps (depayload->srcpad, srccaps);
206 gst_caps_unref (srccaps);
213 GST_ERROR_OBJECT (depayload, "no clock-rate specified");
219 gst_rtp_g722_depay_process (GstRTPBaseDepayload * depayload, GstBuffer * buf)
221 GstRtpG722Depay *rtpg722depay;
225 GstRTPBuffer rtp = { NULL };
227 rtpg722depay = GST_RTP_G722_DEPAY (depayload);
229 gst_rtp_buffer_map (buf, GST_MAP_READ, &rtp);
231 payload_len = gst_rtp_buffer_get_payload_len (&rtp);
233 if (payload_len <= 0)
236 GST_DEBUG_OBJECT (rtpg722depay, "got payload of %d bytes", payload_len);
238 outbuf = gst_rtp_buffer_get_payload_buffer (&rtp);
239 marker = gst_rtp_buffer_get_marker (&rtp);
240 gst_rtp_buffer_unmap (&rtp);
242 if (marker && outbuf) {
243 /* mark talk spurt with DISCONT */
244 GST_BUFFER_FLAG_SET (outbuf, GST_BUFFER_FLAG_DISCONT);
252 GST_ELEMENT_WARNING (rtpg722depay, STREAM, DECODE,
253 ("Empty Payload."), (NULL));
254 gst_rtp_buffer_unmap (&rtp);
260 gst_rtp_g722_depay_plugin_init (GstPlugin * plugin)
262 return gst_element_register (plugin, "rtpg722depay",
263 GST_RANK_SECONDARY, GST_TYPE_RTP_G722_DEPAY);