Libav
rtmppkt.c
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1 /*
2  * RTMP input format
3  * Copyright (c) 2009 Konstantin Shishkov
4  *
5  * This file is part of Libav.
6  *
7  * Libav is free software; you can redistribute it and/or
8  * modify it under the terms of the GNU Lesser General Public
9  * License as published by the Free Software Foundation; either
10  * version 2.1 of the License, or (at your option) any later version.
11  *
12  * Libav is distributed in the hope that it will be useful,
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15  * Lesser General Public License for more details.
16  *
17  * You should have received a copy of the GNU Lesser General Public
18  * License along with Libav; if not, write to the Free Software
19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20  */
21 
22 #include "libavcodec/bytestream.h"
23 #include "libavutil/avstring.h"
24 #include "libavutil/intfloat.h"
25 #include "avformat.h"
26 
27 #include "rtmppkt.h"
28 #include "flv.h"
29 #include "url.h"
30 
31 void ff_amf_write_bool(uint8_t **dst, int val)
32 {
33  bytestream_put_byte(dst, AMF_DATA_TYPE_BOOL);
34  bytestream_put_byte(dst, val);
35 }
36 
37 void ff_amf_write_number(uint8_t **dst, double val)
38 {
39  bytestream_put_byte(dst, AMF_DATA_TYPE_NUMBER);
40  bytestream_put_be64(dst, av_double2int(val));
41 }
42 
43 void ff_amf_write_string(uint8_t **dst, const char *str)
44 {
45  bytestream_put_byte(dst, AMF_DATA_TYPE_STRING);
46  bytestream_put_be16(dst, strlen(str));
47  bytestream_put_buffer(dst, str, strlen(str));
48 }
49 
50 void ff_amf_write_string2(uint8_t **dst, const char *str1, const char *str2)
51 {
52  int len1 = 0, len2 = 0;
53  if (str1)
54  len1 = strlen(str1);
55  if (str2)
56  len2 = strlen(str2);
57  bytestream_put_byte(dst, AMF_DATA_TYPE_STRING);
58  bytestream_put_be16(dst, len1 + len2);
59  bytestream_put_buffer(dst, str1, len1);
60  bytestream_put_buffer(dst, str2, len2);
61 }
62 
64 {
65  bytestream_put_byte(dst, AMF_DATA_TYPE_NULL);
66 }
67 
69 {
70  bytestream_put_byte(dst, AMF_DATA_TYPE_OBJECT);
71 }
72 
73 void ff_amf_write_field_name(uint8_t **dst, const char *str)
74 {
75  bytestream_put_be16(dst, strlen(str));
76  bytestream_put_buffer(dst, str, strlen(str));
77 }
78 
80 {
81  /* first two bytes are field name length = 0,
82  * AMF object should end with it and end marker
83  */
84  bytestream_put_be24(dst, AMF_DATA_TYPE_OBJECT_END);
85 }
86 
87 int ff_amf_read_bool(GetByteContext *bc, int *val)
88 {
89  if (bytestream2_get_byte(bc) != AMF_DATA_TYPE_BOOL)
90  return AVERROR_INVALIDDATA;
91  *val = bytestream2_get_byte(bc);
92  return 0;
93 }
94 
95 int ff_amf_read_number(GetByteContext *bc, double *val)
96 {
97  uint64_t read;
98  if (bytestream2_get_byte(bc) != AMF_DATA_TYPE_NUMBER)
99  return AVERROR_INVALIDDATA;
100  read = bytestream2_get_be64(bc);
101  *val = av_int2double(read);
102  return 0;
103 }
104 
106  int strsize, int *length)
107 {
108  int stringlen = 0;
109  int readsize;
110  stringlen = bytestream2_get_be16(bc);
111  if (stringlen + 1 > strsize)
112  return AVERROR(EINVAL);
113  readsize = bytestream2_get_buffer(bc, str, stringlen);
114  if (readsize != stringlen) {
116  "Unable to read as many bytes as AMF string signaled\n");
117  }
118  str[readsize] = '\0';
119  *length = FFMIN(stringlen, readsize);
120  return 0;
121 }
122 
124  int strsize, int *length)
125 {
126  if (bytestream2_get_byte(bc) != AMF_DATA_TYPE_STRING)
127  return AVERROR_INVALIDDATA;
128  return ff_amf_get_string(bc, str, strsize, length);
129 }
130 
132 {
133  if (bytestream2_get_byte(bc) != AMF_DATA_TYPE_NULL)
134  return AVERROR_INVALIDDATA;
135  return 0;
136 }
137 
138 int ff_rtmp_check_alloc_array(RTMPPacket **prev_pkt, int *nb_prev_pkt,
139  int channel)
140 {
141  int nb_alloc;
142  RTMPPacket *ptr;
143  if (channel < *nb_prev_pkt)
144  return 0;
145 
146  nb_alloc = channel + 16;
147  // This can't use the av_reallocp family of functions, since we
148  // would need to free each element in the array before the array
149  // itself is freed.
150  ptr = av_realloc_array(*prev_pkt, nb_alloc, sizeof(**prev_pkt));
151  if (!ptr)
152  return AVERROR(ENOMEM);
153  memset(ptr + *nb_prev_pkt, 0, (nb_alloc - *nb_prev_pkt) * sizeof(*ptr));
154  *prev_pkt = ptr;
155  *nb_prev_pkt = nb_alloc;
156  return 0;
157 }
158 
160  int chunk_size, RTMPPacket **prev_pkt, int *nb_prev_pkt)
161 {
162  uint8_t hdr;
163 
164  if (ffurl_read(h, &hdr, 1) != 1)
165  return AVERROR(EIO);
166 
167  return ff_rtmp_packet_read_internal(h, p, chunk_size, prev_pkt,
168  nb_prev_pkt, hdr);
169 }
170 
172  int chunk_size, RTMPPacket **prev_pkt_ptr,
173  int *nb_prev_pkt, uint8_t hdr)
174 {
175 
176  uint8_t buf[16];
177  int channel_id, timestamp, size;
178  uint32_t ts_field; // non-extended timestamp or delta field
179  uint32_t extra = 0;
180  enum RTMPPacketType type;
181  int written = 0;
182  int ret, toread;
183  RTMPPacket *prev_pkt;
184 
185  written++;
186  channel_id = hdr & 0x3F;
187 
188  if (channel_id < 2) { //special case for channel number >= 64
189  buf[1] = 0;
190  if (ffurl_read_complete(h, buf, channel_id + 1) != channel_id + 1)
191  return AVERROR(EIO);
192  written += channel_id + 1;
193  channel_id = AV_RL16(buf) + 64;
194  }
195  if ((ret = ff_rtmp_check_alloc_array(prev_pkt_ptr, nb_prev_pkt,
196  channel_id)) < 0)
197  return ret;
198  prev_pkt = *prev_pkt_ptr;
199  size = prev_pkt[channel_id].size;
200  type = prev_pkt[channel_id].type;
201  extra = prev_pkt[channel_id].extra;
202 
203  hdr >>= 6; // header size indicator
204  if (hdr == RTMP_PS_ONEBYTE) {
205  ts_field = prev_pkt[channel_id].ts_field;
206  } else {
207  if (ffurl_read_complete(h, buf, 3) != 3)
208  return AVERROR(EIO);
209  written += 3;
210  ts_field = AV_RB24(buf);
211  if (hdr != RTMP_PS_FOURBYTES) {
212  if (ffurl_read_complete(h, buf, 3) != 3)
213  return AVERROR(EIO);
214  written += 3;
215  size = AV_RB24(buf);
216  if (ffurl_read_complete(h, buf, 1) != 1)
217  return AVERROR(EIO);
218  written++;
219  type = buf[0];
220  if (hdr == RTMP_PS_TWELVEBYTES) {
221  if (ffurl_read_complete(h, buf, 4) != 4)
222  return AVERROR(EIO);
223  written += 4;
224  extra = AV_RL32(buf);
225  }
226  }
227  }
228  if (ts_field == 0xFFFFFF) {
229  if (ffurl_read_complete(h, buf, 4) != 4)
230  return AVERROR(EIO);
231  timestamp = AV_RB32(buf);
232  } else {
233  timestamp = ts_field;
234  }
235  if (hdr != RTMP_PS_TWELVEBYTES)
236  timestamp += prev_pkt[channel_id].timestamp;
237 
238  if (!prev_pkt[channel_id].read) {
239  if ((ret = ff_rtmp_packet_create(p, channel_id, type, timestamp,
240  size)) < 0)
241  return ret;
242  p->read = written;
243  p->offset = 0;
244  prev_pkt[channel_id].ts_field = ts_field;
245  prev_pkt[channel_id].timestamp = timestamp;
246  } else {
247  // previous packet in this channel hasn't completed reading
248  RTMPPacket *prev = &prev_pkt[channel_id];
249  p->data = prev->data;
250  p->size = prev->size;
251  p->channel_id = prev->channel_id;
252  p->type = prev->type;
253  p->ts_field = prev->ts_field;
254  p->extra = prev->extra;
255  p->offset = prev->offset;
256  p->read = prev->read + written;
257  p->timestamp = prev->timestamp;
258  prev->data = NULL;
259  }
260  p->extra = extra;
261  // save history
262  prev_pkt[channel_id].channel_id = channel_id;
263  prev_pkt[channel_id].type = type;
264  prev_pkt[channel_id].size = size;
265  prev_pkt[channel_id].extra = extra;
266  size = size - p->offset;
267 
268  toread = FFMIN(size, chunk_size);
269  if (ffurl_read_complete(h, p->data + p->offset, toread) != toread) {
271  return AVERROR(EIO);
272  }
273  size -= toread;
274  p->read += toread;
275  p->offset += toread;
276 
277  if (size > 0) {
278  RTMPPacket *prev = &prev_pkt[channel_id];
279  prev->data = p->data;
280  prev->read = p->read;
281  prev->offset = p->offset;
282  return AVERROR(EAGAIN);
283  }
284 
285  prev_pkt[channel_id].read = 0; // read complete; reset if needed
286  return p->read;
287 }
288 
290  RTMPPacket **prev_pkt, int *nb_prev_pkt,
291  uint8_t hdr)
292 {
293  while (1) {
294  int ret = rtmp_packet_read_one_chunk(h, p, chunk_size, prev_pkt,
295  nb_prev_pkt, hdr);
296  if (ret > 0 || ret != AVERROR(EAGAIN))
297  return ret;
298 
299  if (ffurl_read(h, &hdr, 1) != 1)
300  return AVERROR(EIO);
301  }
302 }
303 
305  int chunk_size, RTMPPacket **prev_pkt_ptr,
306  int *nb_prev_pkt)
307 {
308  uint8_t pkt_hdr[16], *p = pkt_hdr;
309  int mode = RTMP_PS_TWELVEBYTES;
310  int off = 0;
311  int written = 0;
312  int ret;
313  RTMPPacket *prev_pkt;
314  int use_delta; // flag if using timestamp delta, not RTMP_PS_TWELVEBYTES
315  uint32_t timestamp; // full 32-bit timestamp or delta value
316 
317  if ((ret = ff_rtmp_check_alloc_array(prev_pkt_ptr, nb_prev_pkt,
318  pkt->channel_id)) < 0)
319  return ret;
320  prev_pkt = *prev_pkt_ptr;
321 
322  //if channel_id = 0, this is first presentation of prev_pkt, send full hdr.
323  use_delta = prev_pkt[pkt->channel_id].channel_id &&
324  pkt->extra == prev_pkt[pkt->channel_id].extra &&
325  pkt->timestamp >= prev_pkt[pkt->channel_id].timestamp;
326 
327  timestamp = pkt->timestamp;
328  if (use_delta) {
329  timestamp -= prev_pkt[pkt->channel_id].timestamp;
330  }
331  if (timestamp >= 0xFFFFFF) {
332  pkt->ts_field = 0xFFFFFF;
333  } else {
334  pkt->ts_field = timestamp;
335  }
336 
337  if (use_delta) {
338  if (pkt->type == prev_pkt[pkt->channel_id].type &&
339  pkt->size == prev_pkt[pkt->channel_id].size) {
340  mode = RTMP_PS_FOURBYTES;
341  if (pkt->ts_field == prev_pkt[pkt->channel_id].ts_field)
342  mode = RTMP_PS_ONEBYTE;
343  } else {
344  mode = RTMP_PS_EIGHTBYTES;
345  }
346  }
347 
348  if (pkt->channel_id < 64) {
349  bytestream_put_byte(&p, pkt->channel_id | (mode << 6));
350  } else if (pkt->channel_id < 64 + 256) {
351  bytestream_put_byte(&p, 0 | (mode << 6));
352  bytestream_put_byte(&p, pkt->channel_id - 64);
353  } else {
354  bytestream_put_byte(&p, 1 | (mode << 6));
355  bytestream_put_le16(&p, pkt->channel_id - 64);
356  }
357  if (mode != RTMP_PS_ONEBYTE) {
358  bytestream_put_be24(&p, pkt->ts_field);
359  if (mode != RTMP_PS_FOURBYTES) {
360  bytestream_put_be24(&p, pkt->size);
361  bytestream_put_byte(&p, pkt->type);
362  if (mode == RTMP_PS_TWELVEBYTES)
363  bytestream_put_le32(&p, pkt->extra);
364  }
365  }
366  if (pkt->ts_field == 0xFFFFFF)
367  bytestream_put_be32(&p, timestamp);
368  // save history
369  prev_pkt[pkt->channel_id].channel_id = pkt->channel_id;
370  prev_pkt[pkt->channel_id].type = pkt->type;
371  prev_pkt[pkt->channel_id].size = pkt->size;
372  prev_pkt[pkt->channel_id].timestamp = pkt->timestamp;
373  prev_pkt[pkt->channel_id].ts_field = pkt->ts_field;
374  prev_pkt[pkt->channel_id].extra = pkt->extra;
375 
376  if ((ret = ffurl_write(h, pkt_hdr, p - pkt_hdr)) < 0)
377  return ret;
378  written = p - pkt_hdr + pkt->size;
379  while (off < pkt->size) {
380  int towrite = FFMIN(chunk_size, pkt->size - off);
381  if ((ret = ffurl_write(h, pkt->data + off, towrite)) < 0)
382  return ret;
383  off += towrite;
384  if (off < pkt->size) {
385  uint8_t marker = 0xC0 | pkt->channel_id;
386  if ((ret = ffurl_write(h, &marker, 1)) < 0)
387  return ret;
388  written++;
389  }
390  }
391  return written;
392 }
393 
394 int ff_rtmp_packet_create(RTMPPacket *pkt, int channel_id, RTMPPacketType type,
395  int timestamp, int size)
396 {
397  if (size) {
398  pkt->data = av_malloc(size);
399  if (!pkt->data)
400  return AVERROR(ENOMEM);
401  }
402  pkt->size = size;
403  pkt->channel_id = channel_id;
404  pkt->type = type;
405  pkt->timestamp = timestamp;
406  pkt->extra = 0;
407  pkt->ts_field = 0;
408 
409  return 0;
410 }
411 
413 {
414  if (!pkt)
415  return;
416  av_freep(&pkt->data);
417  pkt->size = 0;
418 }
419 
420 int ff_amf_tag_size(const uint8_t *data, const uint8_t *data_end)
421 {
422  const uint8_t *base = data;
423  AMFDataType type;
424  unsigned nb = -1;
425  int parse_key = 1;
426 
427  if (data >= data_end)
428  return -1;
429  switch ((type = *data++)) {
430  case AMF_DATA_TYPE_NUMBER: return 9;
431  case AMF_DATA_TYPE_BOOL: return 2;
432  case AMF_DATA_TYPE_STRING: return 3 + AV_RB16(data);
433  case AMF_DATA_TYPE_LONG_STRING: return 5 + AV_RB32(data);
434  case AMF_DATA_TYPE_NULL: return 1;
435  case AMF_DATA_TYPE_ARRAY:
436  parse_key = 0;
438  nb = bytestream_get_be32(&data);
440  while (nb-- > 0 || type != AMF_DATA_TYPE_ARRAY) {
441  int t;
442  if (parse_key) {
443  int size = bytestream_get_be16(&data);
444  if (!size) {
445  data++;
446  break;
447  }
448  if (size < 0 || size >= data_end - data)
449  return -1;
450  data += size;
451  }
452  t = ff_amf_tag_size(data, data_end);
453  if (t < 0 || t >= data_end - data)
454  return -1;
455  data += t;
456  }
457  return data - base;
458  case AMF_DATA_TYPE_OBJECT_END: return 1;
459  default: return -1;
460  }
461 }
462 
463 int ff_amf_get_field_value(const uint8_t *data, const uint8_t *data_end,
464  const uint8_t *name, uint8_t *dst, int dst_size)
465 {
466  int namelen = strlen(name);
467  int len;
468 
469  while (*data != AMF_DATA_TYPE_OBJECT && data < data_end) {
470  len = ff_amf_tag_size(data, data_end);
471  if (len < 0)
472  len = data_end - data;
473  data += len;
474  }
475  if (data_end - data < 3)
476  return -1;
477  data++;
478  for (;;) {
479  int size = bytestream_get_be16(&data);
480  if (!size)
481  break;
482  if (size < 0 || size >= data_end - data)
483  return -1;
484  data += size;
485  if (size == namelen && !memcmp(data-size, name, namelen)) {
486  switch (*data++) {
488  snprintf(dst, dst_size, "%g", av_int2double(AV_RB64(data)));
489  break;
490  case AMF_DATA_TYPE_BOOL:
491  snprintf(dst, dst_size, "%s", *data ? "true" : "false");
492  break;
494  len = bytestream_get_be16(&data);
495  av_strlcpy(dst, data, FFMIN(len+1, dst_size));
496  break;
497  default:
498  return -1;
499  }
500  return 0;
501  }
502  len = ff_amf_tag_size(data, data_end);
503  if (len < 0 || len >= data_end - data)
504  return -1;
505  data += len;
506  }
507  return -1;
508 }
509 
510 static const char* rtmp_packet_type(int type)
511 {
512  switch (type) {
513  case RTMP_PT_CHUNK_SIZE: return "chunk size";
514  case RTMP_PT_BYTES_READ: return "bytes read";
515  case RTMP_PT_PING: return "ping";
516  case RTMP_PT_SERVER_BW: return "server bandwidth";
517  case RTMP_PT_CLIENT_BW: return "client bandwidth";
518  case RTMP_PT_AUDIO: return "audio packet";
519  case RTMP_PT_VIDEO: return "video packet";
520  case RTMP_PT_FLEX_STREAM: return "Flex shared stream";
521  case RTMP_PT_FLEX_OBJECT: return "Flex shared object";
522  case RTMP_PT_FLEX_MESSAGE: return "Flex shared message";
523  case RTMP_PT_NOTIFY: return "notification";
524  case RTMP_PT_SHARED_OBJ: return "shared object";
525  case RTMP_PT_INVOKE: return "invoke";
526  case RTMP_PT_METADATA: return "metadata";
527  default: return "unknown";
528  }
529 }
530 
531 static void amf_tag_contents(void *ctx, const uint8_t *data,
532  const uint8_t *data_end)
533 {
534  unsigned int size, nb = -1;
535  char buf[1024];
536  AMFDataType type;
537  int parse_key = 1;
538 
539  if (data >= data_end)
540  return;
541  switch ((type = *data++)) {
543  av_log(ctx, AV_LOG_DEBUG, " number %g\n", av_int2double(AV_RB64(data)));
544  return;
545  case AMF_DATA_TYPE_BOOL:
546  av_log(ctx, AV_LOG_DEBUG, " bool %d\n", *data);
547  return;
550  if (type == AMF_DATA_TYPE_STRING) {
551  size = bytestream_get_be16(&data);
552  } else {
553  size = bytestream_get_be32(&data);
554  }
555  size = FFMIN(size, sizeof(buf) - 1);
556  memcpy(buf, data, size);
557  buf[size] = 0;
558  av_log(ctx, AV_LOG_DEBUG, " string '%s'\n", buf);
559  return;
560  case AMF_DATA_TYPE_NULL:
561  av_log(ctx, AV_LOG_DEBUG, " NULL\n");
562  return;
563  case AMF_DATA_TYPE_ARRAY:
564  parse_key = 0;
566  nb = bytestream_get_be32(&data);
568  av_log(ctx, AV_LOG_DEBUG, " {\n");
569  while (nb-- > 0 || type != AMF_DATA_TYPE_ARRAY) {
570  int t;
571  if (parse_key) {
572  size = bytestream_get_be16(&data);
573  size = FFMIN(size, sizeof(buf) - 1);
574  if (!size) {
575  av_log(ctx, AV_LOG_DEBUG, " }\n");
576  data++;
577  break;
578  }
579  memcpy(buf, data, size);
580  buf[size] = 0;
581  if (size >= data_end - data)
582  return;
583  data += size;
584  av_log(ctx, AV_LOG_DEBUG, " %s: ", buf);
585  }
586  amf_tag_contents(ctx, data, data_end);
587  t = ff_amf_tag_size(data, data_end);
588  if (t < 0 || t >= data_end - data)
589  return;
590  data += t;
591  }
592  return;
594  av_log(ctx, AV_LOG_DEBUG, " }\n");
595  return;
596  default:
597  return;
598  }
599 }
600 
601 void ff_rtmp_packet_dump(void *ctx, RTMPPacket *p)
602 {
603  av_log(ctx, AV_LOG_DEBUG, "RTMP packet type '%s'(%d) for channel %d, timestamp %d, extra field %d size %d\n",
604  rtmp_packet_type(p->type), p->type, p->channel_id, p->timestamp, p->extra, p->size);
605  if (p->type == RTMP_PT_INVOKE || p->type == RTMP_PT_NOTIFY) {
606  uint8_t *src = p->data, *src_end = p->data + p->size;
607  while (src < src_end) {
608  int sz;
609  amf_tag_contents(ctx, src, src_end);
610  sz = ff_amf_tag_size(src, src_end);
611  if (sz < 0)
612  break;
613  src += sz;
614  }
615  } else if (p->type == RTMP_PT_SERVER_BW){
616  av_log(ctx, AV_LOG_DEBUG, "Server BW = %d\n", AV_RB32(p->data));
617  } else if (p->type == RTMP_PT_CLIENT_BW){
618  av_log(ctx, AV_LOG_DEBUG, "Client BW = %d\n", AV_RB32(p->data));
619  } else if (p->type != RTMP_PT_AUDIO && p->type != RTMP_PT_VIDEO && p->type != RTMP_PT_METADATA) {
620  int i;
621  for (i = 0; i < p->size; i++)
622  av_log(ctx, AV_LOG_DEBUG, " %02X", p->data[i]);
623  av_log(ctx, AV_LOG_DEBUG, "\n");
624  }
625 }
626 
627 int ff_amf_match_string(const uint8_t *data, int size, const char *str)
628 {
629  int len = strlen(str);
630  int amf_len, type;
631 
632  if (size < 1)
633  return 0;
634 
635  type = *data++;
636 
637  if (type != AMF_DATA_TYPE_LONG_STRING &&
638  type != AMF_DATA_TYPE_STRING)
639  return 0;
640 
641  if (type == AMF_DATA_TYPE_LONG_STRING) {
642  if ((size -= 4 + 1) < 0)
643  return 0;
644  amf_len = bytestream_get_be32(&data);
645  } else {
646  if ((size -= 2 + 1) < 0)
647  return 0;
648  amf_len = bytestream_get_be16(&data);
649  }
650 
651  if (amf_len > size)
652  return 0;
653 
654  if (amf_len != len)
655  return 0;
656 
657  return !memcmp(data, str, len);
658 }
int ff_amf_match_string(const uint8_t *data, int size, const char *str)
Match AMF string with a NULL-terminated string.
Definition: rtmppkt.c:627
void * av_malloc(size_t size)
Allocate a block of size bytes with alignment suitable for all memory accesses (including vectors if ...
Definition: mem.c:62
int ff_rtmp_packet_read_internal(URLContext *h, RTMPPacket *p, int chunk_size, RTMPPacket **prev_pkt, int *nb_prev_pkt, uint8_t hdr)
Read internal RTMP packet sent by the server.
Definition: rtmppkt.c:289
video packet
Definition: rtmppkt.h:54
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:54
int ff_amf_read_null(GetByteContext *bc)
Read AMF NULL value.
Definition: rtmppkt.c:131
int size
client bandwidth
Definition: rtmppkt.h:52
int ff_rtmp_packet_read(URLContext *h, RTMPPacket *p, int chunk_size, RTMPPacket **prev_pkt, int *nb_prev_pkt)
Read RTMP packet sent by the server.
Definition: rtmppkt.c:159
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:129
#define AV_RB64
Definition: intreadwrite.h:164
int ffurl_write(URLContext *h, const unsigned char *buf, int size)
Write size bytes from buf to the resource accessed by h.
Definition: avio.c:276
void ff_amf_write_field_name(uint8_t **dst, const char *str)
Write string used as field name in AMF object to buffer.
Definition: rtmppkt.c:73
#define AV_RB24
Definition: intreadwrite.h:64
int ff_amf_tag_size(const uint8_t *data, const uint8_t *data_end)
Calculate number of bytes taken by first AMF entry in data.
Definition: rtmppkt.c:420
static av_always_inline uint64_t av_double2int(double f)
Reinterpret a double as a 64-bit integer.
Definition: intfloat.h:70
#define AV_RL16
Definition: intreadwrite.h:42
RTMPPacketType type
packet payload type
Definition: rtmppkt.h:79
void av_freep(void *arg)
Free a memory block which has been allocated with av_malloc(z)() or av_realloc() and set the pointer ...
Definition: mem.c:198
ping
Definition: rtmppkt.h:50
static void amf_tag_contents(void *ctx, const uint8_t *data, const uint8_t *data_end)
Definition: rtmppkt.c:531
static av_always_inline double av_int2double(uint64_t i)
Reinterpret a 64-bit integer as a double.
Definition: intfloat.h:60
uint8_t
int read
amount read, including headers
Definition: rtmppkt.h:86
uint32_t extra
probably an additional channel ID used during streaming data
Definition: rtmppkt.h:82
#define AV_RB32
Definition: intreadwrite.h:130
const char * name
const char data[16]
Definition: mxf.c:70
void ff_amf_write_string(uint8_t **dst, const char *str)
Write string in AMF format to buffer.
Definition: rtmppkt.c:43
void ff_rtmp_packet_dump(void *ctx, RTMPPacket *p)
Print information and contents of RTMP packet.
Definition: rtmppkt.c:601
AMFDataType
Definition: flv.h:106
void ff_amf_write_object_end(uint8_t **dst)
Write marker for end of AMF object to buffer.
Definition: rtmppkt.c:79
int size
packet payload size
Definition: rtmppkt.h:84
void ff_amf_write_bool(uint8_t **dst, int val)
Write boolean value in AMF format to buffer.
Definition: rtmppkt.c:31
number of bytes read
Definition: rtmppkt.h:49
packet has 4-byte header
Definition: rtmppkt.h:70
#define AV_RB16
Definition: intreadwrite.h:53
#define AVERROR(e)
Definition: error.h:43
static av_always_inline unsigned int bytestream2_get_buffer(GetByteContext *g, uint8_t *dst, unsigned int size)
Definition: bytestream.h:260
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:144
audio packet
Definition: rtmppkt.h:53
void av_log(void *avcl, int level, const char *fmt,...)
Definition: log.c:169
int ff_amf_get_string(GetByteContext *bc, uint8_t *str, int strsize, int *length)
Get AMF string value.
Definition: rtmppkt.c:105
packet has 12-byte header
Definition: rtmppkt.h:68
size_t av_strlcpy(char *dst, const char *src, size_t size)
Copy the string src to dst, but no more than size - 1 bytes, and null-terminate dst.
Definition: avstring.c:81
static int rtmp_packet_read_one_chunk(URLContext *h, RTMPPacket *p, int chunk_size, RTMPPacket **prev_pkt_ptr, int *nb_prev_pkt, uint8_t hdr)
Definition: rtmppkt.c:171
server bandwidth
Definition: rtmppkt.h:51
#define FFMIN(a, b)
Definition: common.h:57
void ff_rtmp_packet_destroy(RTMPPacket *pkt)
Free RTMP packet.
Definition: rtmppkt.c:412
RTMPPacketType
known RTMP packet types
Definition: rtmppkt.h:47
int ff_amf_get_field_value(const uint8_t *data, const uint8_t *data_end, const uint8_t *name, uint8_t *dst, int dst_size)
Retrieve value of given AMF object field in string form.
Definition: rtmppkt.c:463
#define AV_RL32
Definition: intreadwrite.h:146
shared object
Definition: rtmppkt.h:59
int ff_rtmp_packet_write(URLContext *h, RTMPPacket *pkt, int chunk_size, RTMPPacket **prev_pkt_ptr, int *nb_prev_pkt)
Send RTMP packet to the server.
Definition: rtmppkt.c:304
Flex shared message.
Definition: rtmppkt.h:57
NULL
Definition: eval.c:55
chunk size change
Definition: rtmppkt.h:48
FLV common header.
Definition: url.h:41
uint32_t ts_field
24-bit timestamp or increment to the previous one, in milliseconds (latter only for media packets)...
Definition: rtmppkt.h:81
int ff_rtmp_packet_create(RTMPPacket *pkt, int channel_id, RTMPPacketType type, int timestamp, int size)
Create new RTMP packet with given attributes.
Definition: rtmppkt.c:394
int ff_amf_read_number(GetByteContext *bc, double *val)
Read AMF number value.
Definition: rtmppkt.c:95
int channel_id
RTMP channel ID (nothing to do with audio/video channels though)
Definition: rtmppkt.h:78
packet has 8-byte header
Definition: rtmppkt.h:69
int ff_amf_read_bool(GetByteContext *bc, int *val)
Read AMF boolean value.
Definition: rtmppkt.c:87
some notification
Definition: rtmppkt.h:58
void ff_amf_write_null(uint8_t **dst)
Write AMF NULL value to buffer.
Definition: rtmppkt.c:63
uint32_t timestamp
packet full timestamp
Definition: rtmppkt.h:80
uint8_t * data
packet payload
Definition: rtmppkt.h:83
static const char * rtmp_packet_type(int type)
Definition: rtmppkt.c:510
int offset
amount of data read so far
Definition: rtmppkt.h:85
Main libavformat public API header.
Flex shared stream.
Definition: rtmppkt.h:55
int ffurl_read_complete(URLContext *h, unsigned char *buf, int size)
Read as many bytes as possible (up to size), calling the read function multiple times if necessary...
Definition: avio.c:269
int ff_rtmp_check_alloc_array(RTMPPacket **prev_pkt, int *nb_prev_pkt, int channel)
Enlarge the prev_pkt array to fit the given channel.
Definition: rtmppkt.c:138
void * av_realloc_array(void *ptr, size_t nmemb, size_t size)
Definition: mem.c:160
int ff_amf_read_string(GetByteContext *bc, uint8_t *str, int strsize, int *length)
Read AMF string value.
Definition: rtmppkt.c:123
static av_always_inline void bytestream_put_buffer(uint8_t **b, const uint8_t *src, unsigned int size)
Definition: bytestream.h:365
packet is really a next chunk of a packet
Definition: rtmppkt.h:71
void ff_amf_write_number(uint8_t **dst, double val)
Write number in AMF format to buffer.
Definition: rtmppkt.c:37
Flex shared object.
Definition: rtmppkt.h:56
int len
void ff_amf_write_object_start(uint8_t **dst)
Write marker for AMF object to buffer.
Definition: rtmppkt.c:68
structure for holding RTMP packets
Definition: rtmppkt.h:77
void ff_amf_write_string2(uint8_t **dst, const char *str1, const char *str2)
Write a string consisting of two parts in AMF format to a buffer.
Definition: rtmppkt.c:50
unbuffered private I/O API
invoke some stream action
Definition: rtmppkt.h:60
int ffurl_read(URLContext *h, unsigned char *buf, int size)
Read up to size bytes from the resource accessed by h, and store the read bytes in buf...
Definition: avio.c:262
FLV metadata.
Definition: rtmppkt.h:61