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 "gstrtpelements.h"
30 #include "gstrtpg722depay.h"
31 #include "gstrtpchannels.h"
32 #include "gstrtputils.h"
34 GST_DEBUG_CATEGORY_STATIC (rtpg722depay_debug);
35 #define GST_CAT_DEFAULT (rtpg722depay_debug)
37 static GstStaticPadTemplate gst_rtp_g722_depay_src_template =
38 GST_STATIC_PAD_TEMPLATE ("src",
41 GST_STATIC_CAPS ("audio/G722, "
42 "rate = (int) [ 1, MAX ], " "channels = (int) [ 1, MAX ]")
45 static GstStaticPadTemplate gst_rtp_g722_depay_sink_template =
46 GST_STATIC_PAD_TEMPLATE ("sink",
49 GST_STATIC_CAPS ("application/x-rtp, "
50 "media = (string) \"audio\", " "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);
67 GST_ELEMENT_REGISTER_DEFINE_WITH_CODE (rtpg722depay, "rtpg722depay",
68 GST_RANK_SECONDARY, GST_TYPE_RTP_G722_DEPAY, rtp_element_init (plugin));
70 static gboolean gst_rtp_g722_depay_setcaps (GstRTPBaseDepayload * depayload,
72 static GstBuffer *gst_rtp_g722_depay_process (GstRTPBaseDepayload * depayload,
76 gst_rtp_g722_depay_class_init (GstRtpG722DepayClass * klass)
78 GstElementClass *gstelement_class;
79 GstRTPBaseDepayloadClass *gstrtpbasedepayload_class;
81 GST_DEBUG_CATEGORY_INIT (rtpg722depay_debug, "rtpg722depay", 0,
82 "G722 RTP Depayloader");
84 gstelement_class = (GstElementClass *) klass;
85 gstrtpbasedepayload_class = (GstRTPBaseDepayloadClass *) klass;
87 gst_element_class_add_static_pad_template (gstelement_class,
88 &gst_rtp_g722_depay_src_template);
89 gst_element_class_add_static_pad_template (gstelement_class,
90 &gst_rtp_g722_depay_sink_template);
92 gst_element_class_set_static_metadata (gstelement_class,
93 "RTP audio depayloader", "Codec/Depayloader/Network/RTP",
94 "Extracts G722 audio from RTP packets",
95 "Wim Taymans <wim.taymans@gmail.com>");
97 gstrtpbasedepayload_class->set_caps = gst_rtp_g722_depay_setcaps;
98 gstrtpbasedepayload_class->process_rtp_packet = gst_rtp_g722_depay_process;
102 gst_rtp_g722_depay_init (GstRtpG722Depay * rtpg722depay)
107 gst_rtp_g722_depay_parse_int (GstStructure * structure, const gchar * field,
113 if ((str = gst_structure_get_string (structure, field)))
116 if (gst_structure_get_int (structure, field, &res))
123 gst_rtp_g722_depay_setcaps (GstRTPBaseDepayload * depayload, GstCaps * caps)
125 GstStructure *structure;
126 GstRtpG722Depay *rtpg722depay;
127 gint clock_rate, payload, samplerate;
132 const gchar *channel_order;
133 const GstRTPChannelOrder *order;
136 rtpg722depay = GST_RTP_G722_DEPAY (depayload);
138 structure = gst_caps_get_structure (caps, 0);
141 gst_structure_get_int (structure, "payload", &payload);
143 case GST_RTP_PAYLOAD_G722:
149 /* no fixed mapping, we need clock-rate */
156 /* caps can overwrite defaults */
158 gst_rtp_g722_depay_parse_int (structure, "clock-rate", clock_rate);
162 if (clock_rate == 8000)
166 samplerate = clock_rate;
169 gst_rtp_g722_depay_parse_int (structure, "encoding-params", channels);
171 channels = gst_rtp_g722_depay_parse_int (structure, "channels", channels);
173 /* channels defaults to 1 otherwise */
178 depayload->clock_rate = clock_rate;
179 rtpg722depay->rate = samplerate;
180 rtpg722depay->channels = channels;
182 srccaps = gst_caps_new_simple ("audio/G722",
183 "rate", G_TYPE_INT, samplerate, "channels", G_TYPE_INT, channels, NULL);
185 /* FIXME: Do something with the channel order */
187 /* add channel positions */
188 channel_order = gst_structure_get_string (structure, "channel-order");
190 order = gst_rtp_channels_get_by_order (channels, channel_order);
192 gst_audio_set_channel_positions (gst_caps_get_structure (srccaps, 0),
195 GstAudioChannelPosition *pos;
197 GST_ELEMENT_WARNING (rtpg722depay, STREAM, DECODE,
198 (NULL), ("Unknown channel order '%s' for %d channels",
199 GST_STR_NULL (channel_order), channels));
200 /* create default NONE layout */
201 pos = gst_rtp_channels_create_default (channels);
202 gst_audio_set_channel_positions (gst_caps_get_structure (srccaps, 0), pos);
207 res = gst_pad_set_caps (depayload->srcpad, srccaps);
208 gst_caps_unref (srccaps);
215 GST_ERROR_OBJECT (depayload, "no clock-rate specified");
221 gst_rtp_g722_depay_process (GstRTPBaseDepayload * depayload, GstRTPBuffer * rtp)
223 GstRtpG722Depay *rtpg722depay;
228 rtpg722depay = GST_RTP_G722_DEPAY (depayload);
230 payload_len = gst_rtp_buffer_get_payload_len (rtp);
232 if (payload_len <= 0)
235 GST_DEBUG_OBJECT (rtpg722depay, "got payload of %d bytes", payload_len);
237 outbuf = gst_rtp_buffer_get_payload_buffer (rtp);
238 marker = gst_rtp_buffer_get_marker (rtp);
240 if (marker && outbuf) {
241 /* mark talk spurt with RESYNC */
242 GST_BUFFER_FLAG_SET (outbuf, GST_BUFFER_FLAG_RESYNC);
246 gst_rtp_drop_non_audio_meta (rtpg722depay, outbuf);
254 GST_ELEMENT_WARNING (rtpg722depay, STREAM, DECODE,
255 ("Empty Payload."), (NULL));