1 /* GStreamer |
|
2 * Copyright (C) <2006> Wim Taymans <wim@fluendo.com> |
|
3 * |
|
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. |
|
8 * |
|
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. |
|
13 * |
|
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. |
|
18 */ |
|
19 |
|
20 /* |
|
21 * based on http://developer.apple.com/quicktime/icefloe/dispatch026.html |
|
22 */ |
|
23 #ifdef HAVE_CONFIG_H |
|
24 # include "config.h" |
|
25 #endif |
|
26 |
|
27 #include <gst/rtp/gstrtpbuffer.h> |
|
28 |
|
29 #include <string.h> |
|
30 #include "gstrtpxqtdepay.h" |
|
31 |
|
32 #define MAKE_TLV(a,b) (((a)<<8)|(b)) |
|
33 |
|
34 #define TLV_sd MAKE_TLV ('s','d') |
|
35 #define TLV_qt MAKE_TLV ('q','t') |
|
36 #define TLV_ti MAKE_TLV ('t','i') |
|
37 #define TLV_ly MAKE_TLV ('l','y') |
|
38 #define TLV_vo MAKE_TLV ('v','o') |
|
39 #define TLV_mx MAKE_TLV ('m','x') |
|
40 #define TLV_tr MAKE_TLV ('t','r') |
|
41 #define TLV_tw MAKE_TLV ('t','w') |
|
42 #define TLV_th MAKE_TLV ('t','h') |
|
43 #define TLV_la MAKE_TLV ('l','a') |
|
44 #define TLV_rt MAKE_TLV ('r','t') |
|
45 #define TLV_gm MAKE_TLV ('g','m') |
|
46 #define TLV_oc MAKE_TLV ('o','c') |
|
47 #define TLV_cr MAKE_TLV ('c','r') |
|
48 #define TLV_du MAKE_TLV ('d','u') |
|
49 #define TLV_po MAKE_TLV ('p','o') |
|
50 |
|
51 #define QT_UINT32(a) (GST_READ_UINT32_BE(a)) |
|
52 #define QT_UINT24(a) (GST_READ_UINT32_BE(a) >> 8) |
|
53 #define QT_UINT16(a) (GST_READ_UINT16_BE(a)) |
|
54 #define QT_UINT8(a) (GST_READ_UINT8(a)) |
|
55 #define QT_FP32(a) ((GST_READ_UINT32_BE(a))/65536.0) |
|
56 #define QT_FP16(a) ((GST_READ_UINT16_BE(a))/256.0) |
|
57 #define QT_FOURCC(a) (GST_READ_UINT32_LE(a)) |
|
58 #define QT_UINT64(a) ((((guint64)QT_UINT32(a))<<32)|QT_UINT32(((guint8 *)a)+4)) |
|
59 |
|
60 #define FOURCC_avc1 GST_MAKE_FOURCC('a','v','c','1') |
|
61 #define FOURCC_avcC GST_MAKE_FOURCC('a','v','c','C') |
|
62 |
|
63 GST_DEBUG_CATEGORY_STATIC (rtpxqtdepay_debug); |
|
64 #define GST_CAT_DEFAULT (rtpxqtdepay_debug) |
|
65 |
|
66 /* elementfactory information */ |
|
67 static const GstElementDetails gst_rtp_xqtdepay_details = |
|
68 GST_ELEMENT_DETAILS ("RTP packet depayloader", |
|
69 "Codec/Depayloader/Network", |
|
70 "Extracts Quicktime audio/video from RTP packets", |
|
71 "Wim Taymans <wim@fluendo.com>"); |
|
72 |
|
73 /* RtpXQTDepay signals and args */ |
|
74 enum |
|
75 { |
|
76 /* FILL ME */ |
|
77 LAST_SIGNAL |
|
78 }; |
|
79 |
|
80 enum |
|
81 { |
|
82 ARG_0, |
|
83 }; |
|
84 |
|
85 static GstStaticPadTemplate gst_rtp_xqt_depay_src_template = |
|
86 GST_STATIC_PAD_TEMPLATE ("src", |
|
87 GST_PAD_SRC, |
|
88 GST_PAD_ALWAYS, |
|
89 GST_STATIC_CAPS_ANY); |
|
90 |
|
91 static GstStaticPadTemplate gst_rtp_xqt_depay_sink_template = |
|
92 GST_STATIC_PAD_TEMPLATE ("sink", |
|
93 GST_PAD_SINK, |
|
94 GST_PAD_ALWAYS, |
|
95 GST_STATIC_CAPS ("application/x-rtp, " |
|
96 "payload = (int) " GST_RTP_PAYLOAD_DYNAMIC_STRING ", " |
|
97 "media = (string) { \"audio\", \"video\" }, clock-rate = (int) [1, MAX], " |
|
98 "encoding-name = (string) { \"X-QT\", \"X-QUICKTIME\" }") |
|
99 ); |
|
100 |
|
101 GST_BOILERPLATE (GstRtpXQTDepay, gst_rtp_xqt_depay, GstBaseRTPDepayload, |
|
102 GST_TYPE_BASE_RTP_DEPAYLOAD); |
|
103 |
|
104 static void gst_rtp_xqt_depay_finalize (GObject * object); |
|
105 |
|
106 static gboolean gst_rtp_xqt_depay_setcaps (GstBaseRTPDepayload * depayload, |
|
107 GstCaps * caps); |
|
108 static GstBuffer *gst_rtp_xqt_depay_process (GstBaseRTPDepayload * depayload, |
|
109 GstBuffer * buf); |
|
110 |
|
111 static GstStateChangeReturn gst_rtp_xqt_depay_change_state (GstElement * |
|
112 element, GstStateChange transition); |
|
113 |
|
114 static void |
|
115 gst_rtp_xqt_depay_base_init (gpointer klass) |
|
116 { |
|
117 GstElementClass *element_class = GST_ELEMENT_CLASS (klass); |
|
118 |
|
119 gst_element_class_add_pad_template (element_class, |
|
120 gst_static_pad_template_get (&gst_rtp_xqt_depay_src_template)); |
|
121 gst_element_class_add_pad_template (element_class, |
|
122 gst_static_pad_template_get (&gst_rtp_xqt_depay_sink_template)); |
|
123 |
|
124 gst_element_class_set_details (element_class, &gst_rtp_xqtdepay_details); |
|
125 } |
|
126 |
|
127 static void |
|
128 gst_rtp_xqt_depay_class_init (GstRtpXQTDepayClass * klass) |
|
129 { |
|
130 GObjectClass *gobject_class; |
|
131 GstElementClass *gstelement_class; |
|
132 GstBaseRTPDepayloadClass *gstbasertpdepayload_class; |
|
133 |
|
134 gobject_class = (GObjectClass *) klass; |
|
135 gstelement_class = (GstElementClass *) klass; |
|
136 gstbasertpdepayload_class = (GstBaseRTPDepayloadClass *) klass; |
|
137 |
|
138 parent_class = g_type_class_peek_parent (klass); |
|
139 |
|
140 gobject_class->finalize = gst_rtp_xqt_depay_finalize; |
|
141 |
|
142 gstelement_class->change_state = gst_rtp_xqt_depay_change_state; |
|
143 |
|
144 gstbasertpdepayload_class->set_caps = gst_rtp_xqt_depay_setcaps; |
|
145 gstbasertpdepayload_class->process = gst_rtp_xqt_depay_process; |
|
146 |
|
147 GST_DEBUG_CATEGORY_INIT (rtpxqtdepay_debug, "rtpxqtdepay", 0, |
|
148 "QT Media RTP Depayloader"); |
|
149 } |
|
150 |
|
151 static void |
|
152 gst_rtp_xqt_depay_init (GstRtpXQTDepay * rtpxqtdepay, |
|
153 GstRtpXQTDepayClass * klass) |
|
154 { |
|
155 rtpxqtdepay->adapter = gst_adapter_new (); |
|
156 } |
|
157 |
|
158 static void |
|
159 gst_rtp_xqt_depay_finalize (GObject * object) |
|
160 { |
|
161 GstRtpXQTDepay *rtpxqtdepay; |
|
162 |
|
163 rtpxqtdepay = GST_RTP_XQT_DEPAY (object); |
|
164 |
|
165 g_object_unref (rtpxqtdepay->adapter); |
|
166 rtpxqtdepay->adapter = NULL; |
|
167 |
|
168 G_OBJECT_CLASS (parent_class)->finalize (object); |
|
169 } |
|
170 |
|
171 static gboolean |
|
172 gst_rtp_quicktime_parse_sd (GstRtpXQTDepay * rtpxqtdepay, guint8 * data, |
|
173 guint data_len) |
|
174 { |
|
175 gint len; |
|
176 guint32 fourcc; |
|
177 |
|
178 if (data_len < 8) |
|
179 goto too_short; |
|
180 |
|
181 len = (data[0] << 24) | (data[1] << 16) | (data[2] << 8) | data[3]; |
|
182 if (len > data_len) |
|
183 goto too_short; |
|
184 |
|
185 fourcc = QT_FOURCC (data + 4); |
|
186 |
|
187 GST_DEBUG_OBJECT (rtpxqtdepay, "parsing %" GST_FOURCC_FORMAT, |
|
188 GST_FOURCC_ARGS (fourcc)); |
|
189 |
|
190 switch (fourcc) { |
|
191 case FOURCC_avc1: |
|
192 { |
|
193 guint32 chlen; |
|
194 |
|
195 if (len < 0x56) |
|
196 goto too_short; |
|
197 len -= 0x56; |
|
198 data += 0x56; |
|
199 |
|
200 /* find avcC */ |
|
201 while (len >= 8) { |
|
202 chlen = QT_UINT32 (data); |
|
203 fourcc = QT_FOURCC (data + 4); |
|
204 if (fourcc == FOURCC_avcC) { |
|
205 GstBuffer *buf; |
|
206 gint size; |
|
207 GstCaps *caps; |
|
208 |
|
209 GST_DEBUG_OBJECT (rtpxqtdepay, "found avcC codec_data in sd, %u", |
|
210 chlen); |
|
211 |
|
212 /* parse, if found */ |
|
213 if (chlen < len) |
|
214 size = chlen - 8; |
|
215 else |
|
216 size = len - 8; |
|
217 |
|
218 buf = gst_buffer_new_and_alloc (size); |
|
219 memcpy (GST_BUFFER_DATA (buf), data + 8, size); |
|
220 caps = gst_caps_new_simple ("video/x-h264", |
|
221 "codec_data", GST_TYPE_BUFFER, buf, NULL); |
|
222 gst_buffer_unref (buf); |
|
223 gst_pad_set_caps (GST_BASE_RTP_DEPAYLOAD (rtpxqtdepay)->srcpad, caps); |
|
224 gst_caps_unref (caps); |
|
225 break; |
|
226 } |
|
227 len -= chlen; |
|
228 data += chlen; |
|
229 } |
|
230 break; |
|
231 } |
|
232 default: |
|
233 break; |
|
234 } |
|
235 return TRUE; |
|
236 |
|
237 /* ERRORS */ |
|
238 too_short: |
|
239 { |
|
240 return FALSE; |
|
241 } |
|
242 } |
|
243 |
|
244 static gboolean |
|
245 gst_rtp_xqt_depay_setcaps (GstBaseRTPDepayload * depayload, GstCaps * caps) |
|
246 { |
|
247 GstStructure *structure; |
|
248 gint clock_rate = 90000; /* default */ |
|
249 |
|
250 structure = gst_caps_get_structure (caps, 0); |
|
251 |
|
252 gst_structure_get_int (structure, "clock-rate", &clock_rate); |
|
253 depayload->clock_rate = clock_rate; |
|
254 |
|
255 return TRUE; |
|
256 } |
|
257 |
|
258 static GstBuffer * |
|
259 gst_rtp_xqt_depay_process (GstBaseRTPDepayload * depayload, GstBuffer * buf) |
|
260 { |
|
261 GstRtpXQTDepay *rtpxqtdepay; |
|
262 GstBuffer *outbuf; |
|
263 gboolean m; |
|
264 |
|
265 rtpxqtdepay = GST_RTP_XQT_DEPAY (depayload); |
|
266 |
|
267 if (!gst_rtp_buffer_validate (buf)) |
|
268 goto bad_packet; |
|
269 |
|
270 if (GST_BUFFER_IS_DISCONT (buf)) { |
|
271 /* discont, clear adapter and try to find a new packet start */ |
|
272 gst_adapter_clear (rtpxqtdepay->adapter); |
|
273 rtpxqtdepay->need_resync = TRUE; |
|
274 GST_DEBUG_OBJECT (rtpxqtdepay, "we need resync"); |
|
275 } |
|
276 |
|
277 m = gst_rtp_buffer_get_marker (buf); |
|
278 GST_LOG_OBJECT (rtpxqtdepay, "marker: %d", m); |
|
279 |
|
280 { |
|
281 gint payload_len; |
|
282 guint avail; |
|
283 guint8 *payload; |
|
284 guint32 timestamp; |
|
285 guint8 ver, pck; |
|
286 gboolean s, q, l, d; |
|
287 |
|
288 payload_len = gst_rtp_buffer_get_payload_len (buf); |
|
289 payload = gst_rtp_buffer_get_payload (buf); |
|
290 |
|
291 /* 1 2 3 |
|
292 * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 |
|
293 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
|
294 * | VER |PCK|S|Q|L| RES |D| QuickTime Payload ID | |
|
295 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
|
296 */ |
|
297 if (payload_len <= 4) |
|
298 goto wrong_length; |
|
299 |
|
300 ver = (payload[0] & 0xf0) >> 4; |
|
301 if (ver > 1) |
|
302 goto wrong_version; |
|
303 |
|
304 pck = (payload[0] & 0x0c) >> 2; |
|
305 if (pck == 0) |
|
306 goto pck_reserved; |
|
307 |
|
308 s = (payload[0] & 0x02) != 0; /* contains sync sample */ |
|
309 q = (payload[0] & 0x01) != 0; /* has payload description */ |
|
310 l = (payload[1] & 0x80) != 0; /* has packet specific information description */ |
|
311 d = (payload[2] & 0x80) != 0; /* don't cache info for payload id */ |
|
312 /* id used for caching info */ |
|
313 rtpxqtdepay->current_id = ((payload[2] & 0x7f) << 8) | payload[3]; |
|
314 |
|
315 GST_LOG_OBJECT (rtpxqtdepay, |
|
316 "VER: %d, PCK: %d, S: %d, Q: %d, L: %d, D: %d, ID: %d", ver, pck, s, q, |
|
317 l, d, rtpxqtdepay->current_id); |
|
318 |
|
319 if (rtpxqtdepay->need_resync) { |
|
320 /* we need to find the boundary of a new packet after a DISCONT */ |
|
321 if (pck != 3 || q) { |
|
322 /* non-fragmented packet or payload description present, packet starts |
|
323 * here. */ |
|
324 rtpxqtdepay->need_resync = FALSE; |
|
325 } else { |
|
326 /* fragmented packet without description */ |
|
327 if (m) { |
|
328 /* marker bit set, next packet is start of new one */ |
|
329 rtpxqtdepay->need_resync = FALSE; |
|
330 } |
|
331 goto need_resync; |
|
332 } |
|
333 } |
|
334 |
|
335 payload += 4; |
|
336 payload_len -= 4; |
|
337 |
|
338 if (q) { |
|
339 gboolean k, f, a, z; |
|
340 guint pdlen, pdpadded; |
|
341 gint padding; |
|
342 guint32 media_type, timescale; |
|
343 |
|
344 /* 1 2 3 |
|
345 * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 |
|
346 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
|
347 * |K|F|A|Z| RES | QuickTime Payload Desc Length | |
|
348 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
|
349 * . QuickTime Payload Desc Data ... . |
|
350 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
|
351 */ |
|
352 if (payload_len <= 4) |
|
353 goto wrong_length; |
|
354 |
|
355 k = (payload[0] & 0x80) != 0; /* keyframe */ |
|
356 f = (payload[0] & 0x40) != 0; /* sparse */ |
|
357 a = (payload[0] & 0x20) != 0; /* start of payload */ |
|
358 z = (payload[0] & 0x10) != 0; /* end of payload */ |
|
359 pdlen = (payload[2] << 8) | payload[3]; |
|
360 |
|
361 if (pdlen < 12) |
|
362 goto wrong_length; |
|
363 |
|
364 /* calc padding */ |
|
365 pdpadded = pdlen + 3; |
|
366 pdpadded -= pdpadded % 4; |
|
367 if (payload_len < pdpadded) |
|
368 goto wrong_length; |
|
369 |
|
370 padding = pdpadded - pdlen; |
|
371 GST_LOG_OBJECT (rtpxqtdepay, |
|
372 "K: %d, F: %d, A: %d, Z: %d, len: %d, padding %d", k, f, a, z, pdlen, |
|
373 padding); |
|
374 |
|
375 payload += 4; |
|
376 payload_len -= 4; |
|
377 /* 1 2 3 |
|
378 * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 |
|
379 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
|
380 * | QuickTime Media Type | |
|
381 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
|
382 * | Timescale | |
|
383 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
|
384 * . QuickTime TLVs ... . |
|
385 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
|
386 */ |
|
387 media_type = |
|
388 (payload[0] << 24) | (payload[1] << 16) | (payload[2] << 8) | |
|
389 payload[3]; |
|
390 timescale = |
|
391 (payload[4] << 24) | (payload[5] << 16) | (payload[6] << 8) | |
|
392 payload[7]; |
|
393 |
|
394 GST_LOG_OBJECT (rtpxqtdepay, "media_type: %c%c%c%c, timescale %u", |
|
395 payload[0], payload[1], payload[2], payload[3], timescale); |
|
396 |
|
397 payload += 8; |
|
398 payload_len -= 8; |
|
399 pdlen -= 12; |
|
400 |
|
401 /* parse TLV (type-length-value triplets */ |
|
402 while (pdlen > 3) { |
|
403 guint16 tlv_len, tlv_type; |
|
404 |
|
405 /* 1 2 3 |
|
406 * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 |
|
407 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
|
408 * | QuickTime TLV Length | QuickTime TLV Type | |
|
409 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
|
410 * . QuickTime TLV Value ... . |
|
411 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
|
412 */ |
|
413 tlv_len = (payload[0] << 8) | payload[1]; |
|
414 tlv_type = (payload[2] << 8) | payload[3]; |
|
415 pdlen -= 4; |
|
416 if (tlv_len > pdlen) |
|
417 goto wrong_length; |
|
418 |
|
419 GST_LOG_OBJECT (rtpxqtdepay, "TLV '%c%c', len %d", payload[2], |
|
420 payload[3], tlv_len); |
|
421 |
|
422 payload += 4; |
|
423 payload_len -= 4; |
|
424 |
|
425 switch (tlv_type) { |
|
426 case TLV_sd: |
|
427 /* Session description */ |
|
428 if (!gst_rtp_quicktime_parse_sd (rtpxqtdepay, payload, tlv_len)) |
|
429 goto unknown_format; |
|
430 rtpxqtdepay->have_sd = TRUE; |
|
431 break; |
|
432 case TLV_qt: |
|
433 case TLV_ti: |
|
434 case TLV_ly: |
|
435 case TLV_vo: |
|
436 case TLV_mx: |
|
437 case TLV_tr: |
|
438 case TLV_tw: |
|
439 case TLV_th: |
|
440 case TLV_la: |
|
441 case TLV_rt: |
|
442 case TLV_gm: |
|
443 case TLV_oc: |
|
444 case TLV_cr: |
|
445 case TLV_du: |
|
446 case TLV_po: |
|
447 default: |
|
448 break; |
|
449 } |
|
450 |
|
451 pdlen -= tlv_len; |
|
452 payload += tlv_len; |
|
453 payload_len -= tlv_len; |
|
454 } |
|
455 payload += padding; |
|
456 payload_len -= padding; |
|
457 } |
|
458 |
|
459 if (l) { |
|
460 guint ssilen, ssipadded; |
|
461 gint padding; |
|
462 |
|
463 /* 1 2 3 |
|
464 * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 |
|
465 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
|
466 * | RES | Sample-Specific Info Length | |
|
467 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
|
468 * . QuickTime TLVs ... |
|
469 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
|
470 */ |
|
471 if (payload_len <= 4) |
|
472 goto wrong_length; |
|
473 |
|
474 ssilen = (payload[2] << 8) | payload[3]; |
|
475 if (ssilen < 4) |
|
476 goto wrong_length; |
|
477 |
|
478 /* calc padding */ |
|
479 ssipadded = ssilen + 3; |
|
480 ssipadded -= ssipadded % 4; |
|
481 if (payload_len < ssipadded) |
|
482 goto wrong_length; |
|
483 |
|
484 padding = ssipadded - ssilen; |
|
485 GST_LOG_OBJECT (rtpxqtdepay, "len: %d, padding %d", ssilen, padding); |
|
486 |
|
487 payload += 4; |
|
488 payload_len -= 4; |
|
489 ssilen -= 4; |
|
490 |
|
491 /* parse TLV (type-length-value triplets */ |
|
492 while (ssilen > 3) { |
|
493 guint16 tlv_len, tlv_type; |
|
494 |
|
495 /* 1 2 3 |
|
496 * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 |
|
497 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
|
498 * | QuickTime TLV Length | QuickTime TLV Type | |
|
499 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
|
500 * . QuickTime TLV Value ... . |
|
501 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
|
502 */ |
|
503 tlv_len = (payload[0] << 8) | payload[1]; |
|
504 tlv_type = (payload[2] << 8) | payload[3]; |
|
505 ssilen -= 4; |
|
506 if (tlv_len > ssilen) |
|
507 goto wrong_length; |
|
508 |
|
509 GST_LOG_OBJECT (rtpxqtdepay, "TLV '%c%c', len %d", payload[2], |
|
510 payload[3], tlv_len); |
|
511 |
|
512 payload += 4; |
|
513 payload_len -= 4; |
|
514 |
|
515 switch (tlv_type) { |
|
516 case TLV_sd: |
|
517 case TLV_qt: |
|
518 case TLV_ti: |
|
519 case TLV_ly: |
|
520 case TLV_vo: |
|
521 case TLV_mx: |
|
522 case TLV_tr: |
|
523 case TLV_tw: |
|
524 case TLV_th: |
|
525 case TLV_la: |
|
526 case TLV_rt: |
|
527 case TLV_gm: |
|
528 case TLV_oc: |
|
529 case TLV_cr: |
|
530 case TLV_du: |
|
531 case TLV_po: |
|
532 default: |
|
533 break; |
|
534 } |
|
535 |
|
536 ssilen -= tlv_len; |
|
537 payload += tlv_len; |
|
538 payload_len -= tlv_len; |
|
539 } |
|
540 payload += padding; |
|
541 payload_len -= padding; |
|
542 } |
|
543 |
|
544 timestamp = gst_rtp_buffer_get_timestamp (buf); |
|
545 rtpxqtdepay->previous_id = rtpxqtdepay->current_id; |
|
546 |
|
547 switch (pck) { |
|
548 case 1: |
|
549 { |
|
550 /* multiple samples per packet. */ |
|
551 outbuf = gst_buffer_new_and_alloc (payload_len); |
|
552 memcpy (GST_BUFFER_DATA (outbuf), payload, payload_len); |
|
553 return outbuf; |
|
554 } |
|
555 case 2: |
|
556 { |
|
557 guint slen, timestamp; |
|
558 |
|
559 /* multiple samples per packet. |
|
560 * 1 2 3 |
|
561 * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 |
|
562 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
|
563 * |S| Reserved | Sample Length | |
|
564 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
|
565 * | Sample Timestamp | |
|
566 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
|
567 * . Sample Data ... . |
|
568 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
|
569 * |S| Reserved | Sample Length | |
|
570 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
|
571 * | Sample Timestamp | |
|
572 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
|
573 * . Sample Data ... . |
|
574 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
|
575 * . ...... . |
|
576 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
|
577 */ |
|
578 while (payload_len > 8) { |
|
579 s = (payload[0] & 0x80) != 0; /* contains sync sample */ |
|
580 slen = (payload[2] << 8) | payload[3]; |
|
581 timestamp = |
|
582 (payload[4] << 24) | (payload[5] << 16) | (payload[6] << 8) | |
|
583 payload[7]; |
|
584 |
|
585 payload += 8; |
|
586 payload_len -= 8; |
|
587 |
|
588 if (slen > payload_len) |
|
589 slen = payload_len; |
|
590 |
|
591 outbuf = gst_buffer_new_and_alloc (slen); |
|
592 memcpy (GST_BUFFER_DATA (outbuf), payload, slen); |
|
593 if (!s) |
|
594 GST_BUFFER_FLAG_SET (outbuf, GST_BUFFER_FLAG_DELTA_UNIT); |
|
595 |
|
596 gst_base_rtp_depayload_push (depayload, outbuf); |
|
597 |
|
598 /* aligned on 32 bit boundary */ |
|
599 slen = GST_ROUND_UP_4 (slen); |
|
600 |
|
601 payload += slen; |
|
602 payload_len -= slen; |
|
603 } |
|
604 break; |
|
605 } |
|
606 case 3: |
|
607 { |
|
608 /* one sample per packet, use adapter to combine based on marker bit. */ |
|
609 outbuf = gst_buffer_new_and_alloc (payload_len); |
|
610 memcpy (GST_BUFFER_DATA (outbuf), payload, payload_len); |
|
611 |
|
612 gst_adapter_push (rtpxqtdepay->adapter, outbuf); |
|
613 |
|
614 if (!m) |
|
615 goto done; |
|
616 |
|
617 avail = gst_adapter_available (rtpxqtdepay->adapter); |
|
618 outbuf = gst_adapter_take_buffer (rtpxqtdepay->adapter, avail); |
|
619 |
|
620 GST_DEBUG_OBJECT (rtpxqtdepay, |
|
621 "gst_rtp_xqt_depay_chain: pushing buffer of size %u", avail); |
|
622 |
|
623 return outbuf; |
|
624 } |
|
625 } |
|
626 } |
|
627 |
|
628 done: |
|
629 return NULL; |
|
630 |
|
631 bad_packet: |
|
632 { |
|
633 GST_ELEMENT_WARNING (rtpxqtdepay, STREAM, DECODE, |
|
634 ("Packet did not validate."), (NULL)); |
|
635 return NULL; |
|
636 } |
|
637 need_resync: |
|
638 { |
|
639 GST_DEBUG_OBJECT (rtpxqtdepay, "waiting for marker"); |
|
640 return NULL; |
|
641 } |
|
642 wrong_version: |
|
643 { |
|
644 GST_ELEMENT_WARNING (rtpxqtdepay, STREAM, DECODE, |
|
645 ("Unknown payload version."), (NULL)); |
|
646 return NULL; |
|
647 } |
|
648 pck_reserved: |
|
649 { |
|
650 GST_ELEMENT_WARNING (rtpxqtdepay, STREAM, DECODE, |
|
651 ("PCK reserved 0."), (NULL)); |
|
652 return NULL; |
|
653 } |
|
654 wrong_length: |
|
655 { |
|
656 GST_ELEMENT_WARNING (rtpxqtdepay, STREAM, DECODE, |
|
657 ("Wrong payload length."), (NULL)); |
|
658 return NULL; |
|
659 } |
|
660 unknown_format: |
|
661 { |
|
662 GST_ELEMENT_WARNING (rtpxqtdepay, STREAM, DECODE, |
|
663 ("Unknown payload format."), (NULL)); |
|
664 return NULL; |
|
665 } |
|
666 } |
|
667 |
|
668 static GstStateChangeReturn |
|
669 gst_rtp_xqt_depay_change_state (GstElement * element, GstStateChange transition) |
|
670 { |
|
671 GstRtpXQTDepay *rtpxqtdepay; |
|
672 GstStateChangeReturn ret; |
|
673 |
|
674 rtpxqtdepay = GST_RTP_XQT_DEPAY (element); |
|
675 |
|
676 switch (transition) { |
|
677 case GST_STATE_CHANGE_READY_TO_PAUSED: |
|
678 gst_adapter_clear (rtpxqtdepay->adapter); |
|
679 rtpxqtdepay->previous_id = -1; |
|
680 rtpxqtdepay->current_id = -1; |
|
681 rtpxqtdepay->need_resync = TRUE; |
|
682 rtpxqtdepay->have_sd = FALSE; |
|
683 break; |
|
684 default: |
|
685 break; |
|
686 } |
|
687 |
|
688 ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition); |
|
689 |
|
690 switch (transition) { |
|
691 case GST_STATE_CHANGE_PAUSED_TO_READY: |
|
692 gst_adapter_clear (rtpxqtdepay->adapter); |
|
693 default: |
|
694 break; |
|
695 } |
|
696 return ret; |
|
697 } |
|
698 |
|
699 gboolean |
|
700 gst_rtp_xqt_depay_plugin_init (GstPlugin * plugin) |
|
701 { |
|
702 return gst_element_register (plugin, "rtpxqtdepay", |
|
703 GST_RANK_MARGINAL, GST_TYPE_RTP_XQT_DEPAY); |
|
704 } |
|