2 * Copyright (C) <2009> Edward Hervey <bilboed@bilboed.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.
26 #include <gst/rtp/gstrtpbuffer.h>
27 #include "gstrtpqdmdepay.h"
29 GST_DEBUG_CATEGORY (rtpqdm2depay_debug);
30 #define GST_CAT_DEFAULT rtpqdm2depay_debug
32 static GstStaticPadTemplate gst_rtp_qdm2_depay_src_template =
33 GST_STATIC_PAD_TEMPLATE ("src",
36 GST_STATIC_CAPS ("audio/x-qdm2")
39 static GstStaticPadTemplate gst_rtp_qdm2_depay_sink_template =
40 GST_STATIC_PAD_TEMPLATE ("sink",
43 GST_STATIC_CAPS ("application/x-rtp, "
44 "media = (string) \"audio\", "
45 "payload = (int) " GST_RTP_PAYLOAD_DYNAMIC_STRING ", "
46 "encoding-name = (string)\"X-QDM\"")
49 GST_BOILERPLATE (GstRtpQDM2Depay, gst_rtp_qdm2_depay, GstBaseRTPDepayload,
50 GST_TYPE_BASE_RTP_DEPAYLOAD);
52 static const guint8 headheader[20] = {
53 0x0, 0x0, 0x0, 0xc, 0x66, 0x72, 0x6d, 0x61,
54 0x51, 0x44, 0x4d, 0x32, 0x0, 0x0, 0x0, 0x24,
55 0x51, 0x44, 0x43, 0x41
58 static void gst_rtp_qdm2_depay_finalize (GObject * object);
60 static GstStateChangeReturn gst_rtp_qdm2_depay_change_state (GstElement *
61 element, GstStateChange transition);
63 static GstBuffer *gst_rtp_qdm2_depay_process (GstBaseRTPDepayload * depayload,
65 gboolean gst_rtp_qdm2_depay_setcaps (GstBaseRTPDepayload * filter,
69 gst_rtp_qdm2_depay_base_init (gpointer klass)
71 GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
73 gst_element_class_add_static_pad_template (element_class,
74 &gst_rtp_qdm2_depay_src_template);
75 gst_element_class_add_static_pad_template (element_class,
76 &gst_rtp_qdm2_depay_sink_template);
79 gst_element_class_set_details_simple (element_class, "RTP QDM2 depayloader",
80 "Codec/Depayloader/Network/RTP",
81 "Extracts QDM2 audio from RTP packets (no RFC)",
82 "Edward Hervey <bilboed@bilboed.com>");
86 gst_rtp_qdm2_depay_class_init (GstRtpQDM2DepayClass * klass)
88 GObjectClass *gobject_class;
89 GstElementClass *gstelement_class;
90 GstBaseRTPDepayloadClass *gstbasertpdepayload_class;
92 gobject_class = (GObjectClass *) klass;
93 gstelement_class = (GstElementClass *) klass;
94 gstbasertpdepayload_class = (GstBaseRTPDepayloadClass *) klass;
96 gstbasertpdepayload_class->process = gst_rtp_qdm2_depay_process;
97 gstbasertpdepayload_class->set_caps = gst_rtp_qdm2_depay_setcaps;
99 gobject_class->finalize = gst_rtp_qdm2_depay_finalize;
101 gstelement_class->change_state = gst_rtp_qdm2_depay_change_state;
105 gst_rtp_qdm2_depay_init (GstRtpQDM2Depay * rtpqdm2depay,
106 GstRtpQDM2DepayClass * klass)
108 rtpqdm2depay->adapter = gst_adapter_new ();
112 gst_rtp_qdm2_depay_finalize (GObject * object)
114 GstRtpQDM2Depay *rtpqdm2depay;
116 rtpqdm2depay = GST_RTP_QDM2_DEPAY (object);
118 g_object_unref (rtpqdm2depay->adapter);
119 rtpqdm2depay->adapter = NULL;
121 G_OBJECT_CLASS (parent_class)->finalize (object);
126 gst_rtp_qdm2_depay_setcaps (GstBaseRTPDepayload * filter, GstCaps * caps)
128 GstStructure *structure = gst_caps_get_structure (caps, 0);
131 if (!gst_structure_get_int (structure, "clock-rate", &clock_rate))
132 clock_rate = 44100; // default
133 filter->clock_rate = clock_rate;
135 /* will set caps later */
141 flush_data (GstRtpQDM2Depay * depay)
146 if ((avail = gst_adapter_available (depay->adapter)))
147 gst_adapter_flush (depay->adapter, avail);
149 GST_DEBUG ("Flushing %d packets", depay->nbpackets);
151 for (i = 0; depay->packets[i]; i++) {
152 QDM2Packet *pack = depay->packets[i];
158 /* CRC is the sum of everything (including first bytes) */
162 if (G_UNLIKELY (data == NULL))
165 /* If the packet size is bigger than 0xff, we need 2 bytes to store the size */
166 if (depay->packetsize > 0xff) {
167 /* Expanded size 0x02 | 0x80 */
169 GST_WRITE_UINT16_BE (data + 1, depay->packetsize - 3);
172 data[1] = depay->packetsize - 2;
176 for (; i < depay->packetsize; i++)
179 GST_DEBUG ("CRC is 0x%x", crc);
182 if (depay->packetsize > 0xff)
183 GST_WRITE_UINT16_BE (data + 3, crc);
185 GST_WRITE_UINT16_BE (data + 2, crc);
187 GST_MEMDUMP ("Extracted packet", data, depay->packetsize);
189 buf = gst_buffer_new ();
190 GST_BUFFER_DATA (buf) = data;
191 GST_BUFFER_MALLOCDATA (buf) = data;
192 GST_BUFFER_SIZE (buf) = depay->packetsize;
194 gst_adapter_push (depay->adapter, buf);
203 add_packet (GstRtpQDM2Depay * depay, guint32 pid, guint32 len, guint8 * data)
207 if (G_UNLIKELY (!depay->configured))
210 GST_DEBUG ("pid:%d, len:%d, data:%p", pid, len, data);
212 if (G_UNLIKELY (depay->packets[pid] == NULL)) {
213 depay->packets[pid] = g_malloc0 (sizeof (QDM2Packet));
214 depay->nbpackets = MAX (depay->nbpackets, pid + 1);
216 packet = depay->packets[pid];
218 GST_DEBUG ("packet:%p", packet);
219 GST_DEBUG ("packet->data:%p", packet->data);
221 if (G_UNLIKELY (packet->data == NULL)) {
222 packet->data = g_malloc0 (depay->packetsize);
223 /* We leave space for the header/crc */
224 if (depay->packetsize > 0xff)
230 /* Finally copy the data over */
231 memcpy (packet->data + packet->offs, data, len);
236 gst_rtp_qdm2_depay_process (GstBaseRTPDepayload * depayload, GstBuffer * buf)
238 GstRtpQDM2Depay *rtpqdm2depay;
242 rtpqdm2depay = GST_RTP_QDM2_DEPAY (depayload);
250 payload_len = gst_rtp_buffer_get_payload_len (buf);
254 payload = gst_rtp_buffer_get_payload (buf);
255 seq = gst_rtp_buffer_get_seq (buf);
256 if (G_UNLIKELY (seq != rtpqdm2depay->nextseq)) {
257 GST_DEBUG ("GAP in sequence number, Resetting data !");
258 /* Flush previous data */
259 flush_data (rtpqdm2depay);
260 /* And store new timestamp */
261 rtpqdm2depay->ptimestamp = rtpqdm2depay->timestamp;
262 rtpqdm2depay->timestamp = GST_BUFFER_TIMESTAMP (buf);
263 /* And that previous data will be pushed at the bottom */
265 rtpqdm2depay->nextseq = seq + 1;
267 GST_DEBUG ("Payload size %d 0x%x sequence:%d", payload_len, payload_len,
270 GST_MEMDUMP ("Incoming payload", payload, payload_len);
272 while (pos < payload_len) {
273 switch (payload[pos]) {
275 GST_DEBUG ("Unrecognized 0x80 marker, skipping 12 bytes");
281 GST_DEBUG ("Headers");
282 /* Store the incoming timestamp */
283 rtpqdm2depay->ptimestamp = rtpqdm2depay->timestamp;
284 rtpqdm2depay->timestamp = GST_BUFFER_TIMESTAMP (buf);
285 /* flush the internal data if needed */
286 flush_data (rtpqdm2depay);
287 if (G_UNLIKELY (!rtpqdm2depay->configured)) {
289 GstBuffer *codecdata;
292 /* First bytes are unknown */
293 GST_MEMDUMP ("Header", payload + pos, 32);
294 ourdata = payload + pos + 10;
296 rtpqdm2depay->channs = GST_READ_UINT32_BE (payload + pos + 4);
297 rtpqdm2depay->samplerate = GST_READ_UINT32_BE (payload + pos + 8);
298 rtpqdm2depay->bitrate = GST_READ_UINT32_BE (payload + pos + 12);
299 rtpqdm2depay->blocksize = GST_READ_UINT32_BE (payload + pos + 16);
300 rtpqdm2depay->framesize = GST_READ_UINT32_BE (payload + pos + 20);
301 rtpqdm2depay->packetsize = GST_READ_UINT32_BE (payload + pos + 24);
302 /* 16 bit empty block (0x02 0x00) */
305 ("channs:%d, samplerate:%d, bitrate:%d, blocksize:%d, framesize:%d, packetsize:%d",
306 rtpqdm2depay->channs, rtpqdm2depay->samplerate,
307 rtpqdm2depay->bitrate, rtpqdm2depay->blocksize,
308 rtpqdm2depay->framesize, rtpqdm2depay->packetsize);
311 codecdata = gst_buffer_new_and_alloc (48);
312 memcpy (GST_BUFFER_DATA (codecdata), headheader, 20);
313 memcpy (GST_BUFFER_DATA (codecdata) + 20, ourdata, 28);
315 caps = gst_caps_new_simple ("audio/x-qdm2",
316 "samplesize", G_TYPE_INT, 16,
317 "rate", G_TYPE_INT, rtpqdm2depay->samplerate,
318 "channels", G_TYPE_INT, rtpqdm2depay->channs,
319 "codec_data", GST_TYPE_BUFFER, codecdata, NULL);
320 gst_pad_set_caps (GST_BASE_RTP_DEPAYLOAD_SRCPAD (depayload), caps);
321 gst_caps_unref (caps);
322 rtpqdm2depay->configured = TRUE;
324 GST_DEBUG ("Already configured, skipping headers");
329 /* Shuffled packet contents */
330 guint packetid = payload[pos++];
331 guint packettype = payload[pos++];
332 guint packlen = payload[pos++];
335 GST_DEBUG ("Packet id:%d, type:0x%x, len:%d",
336 packetid, packettype, packlen);
338 /* Packets bigger than 0xff bytes have a type with the high bit set */
339 if (G_UNLIKELY (packettype & 0x80)) {
342 packlen |= payload[pos++];
344 GST_DEBUG ("Packet id:%d, type:0x%x, len:%d",
345 packetid, packettype, packlen);
348 if (packettype > 0x7f) {
349 GST_ERROR ("HOUSTON WE HAVE A PROBLEM !!!!");
351 add_packet (rtpqdm2depay, packetid, packlen + hsize,
352 payload + pos - hsize);
358 GST_DEBUG ("final pos %d", pos);
360 avail = gst_adapter_available (rtpqdm2depay->adapter);
361 if (G_UNLIKELY (avail)) {
362 GST_DEBUG ("Pushing out %d bytes of collected data", avail);
363 outbuf = gst_adapter_take_buffer (rtpqdm2depay->adapter, avail);
364 GST_BUFFER_TIMESTAMP (outbuf) = rtpqdm2depay->ptimestamp;
365 GST_DEBUG ("Outgoing buffer timestamp %" GST_TIME_FORMAT,
366 GST_TIME_ARGS (rtpqdm2depay->ptimestamp));
375 GST_ELEMENT_WARNING (rtpqdm2depay, STREAM, DECODE,
376 (NULL), ("Packet was too short"));
381 static GstStateChangeReturn
382 gst_rtp_qdm2_depay_change_state (GstElement * element,
383 GstStateChange transition)
385 GstRtpQDM2Depay *rtpqdm2depay;
386 GstStateChangeReturn ret;
388 rtpqdm2depay = GST_RTP_QDM2_DEPAY (element);
390 switch (transition) {
391 case GST_STATE_CHANGE_NULL_TO_READY:
393 case GST_STATE_CHANGE_READY_TO_PAUSED:
394 gst_adapter_clear (rtpqdm2depay->adapter);
400 ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
402 switch (transition) {
403 case GST_STATE_CHANGE_READY_TO_NULL:
412 gst_rtp_qdm2_depay_plugin_init (GstPlugin * plugin)
414 GST_DEBUG_CATEGORY_INIT (rtpqdm2depay_debug, "rtpqdm2depay", 0,
415 "RTP QDM2 depayloader");
417 return gst_element_register (plugin, "rtpqdm2depay",
418 GST_RANK_SECONDARY, GST_TYPE_RTP_QDM2_DEPAY);