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 && size != prev_pkt[channel_id].size) {
239  av_log(h, AV_LOG_ERROR, "RTMP packet size mismatch %d != %d\n",
240  size, prev_pkt[channel_id].size);
241  ff_rtmp_packet_destroy(&prev_pkt[channel_id]);
242  prev_pkt[channel_id].read = 0;
243  return AVERROR_INVALIDDATA;
244  }
245 
246  if (!prev_pkt[channel_id].read) {
247  if ((ret = ff_rtmp_packet_create(p, channel_id, type, timestamp,
248  size)) < 0)
249  return ret;
250  p->read = written;
251  p->offset = 0;
252  prev_pkt[channel_id].ts_field = ts_field;
253  prev_pkt[channel_id].timestamp = timestamp;
254  } else {
255  // previous packet in this channel hasn't completed reading
256  RTMPPacket *prev = &prev_pkt[channel_id];
257  p->data = prev->data;
258  p->size = prev->size;
259  p->channel_id = prev->channel_id;
260  p->type = prev->type;
261  p->ts_field = prev->ts_field;
262  p->extra = prev->extra;
263  p->offset = prev->offset;
264  p->read = prev->read + written;
265  p->timestamp = prev->timestamp;
266  prev->data = NULL;
267  }
268  p->extra = extra;
269  // save history
270  prev_pkt[channel_id].channel_id = channel_id;
271  prev_pkt[channel_id].type = type;
272  prev_pkt[channel_id].size = size;
273  prev_pkt[channel_id].extra = extra;
274  size = size - p->offset;
275 
276  toread = FFMIN(size, chunk_size);
277  if (ffurl_read_complete(h, p->data + p->offset, toread) != toread) {
279  return AVERROR(EIO);
280  }
281  size -= toread;
282  p->read += toread;
283  p->offset += toread;
284 
285  if (size > 0) {
286  RTMPPacket *prev = &prev_pkt[channel_id];
287  prev->data = p->data;
288  prev->read = p->read;
289  prev->offset = p->offset;
290  return AVERROR(EAGAIN);
291  }
292 
293  prev_pkt[channel_id].read = 0; // read complete; reset if needed
294  return p->read;
295 }
296 
298  RTMPPacket **prev_pkt, int *nb_prev_pkt,
299  uint8_t hdr)
300 {
301  while (1) {
302  int ret = rtmp_packet_read_one_chunk(h, p, chunk_size, prev_pkt,
303  nb_prev_pkt, hdr);
304  if (ret > 0 || ret != AVERROR(EAGAIN))
305  return ret;
306 
307  if (ffurl_read(h, &hdr, 1) != 1)
308  return AVERROR(EIO);
309  }
310 }
311 
313  int chunk_size, RTMPPacket **prev_pkt_ptr,
314  int *nb_prev_pkt)
315 {
316  uint8_t pkt_hdr[16], *p = pkt_hdr;
317  int mode = RTMP_PS_TWELVEBYTES;
318  int off = 0;
319  int written = 0;
320  int ret;
321  RTMPPacket *prev_pkt;
322  int use_delta; // flag if using timestamp delta, not RTMP_PS_TWELVEBYTES
323  uint32_t timestamp; // full 32-bit timestamp or delta value
324 
325  if ((ret = ff_rtmp_check_alloc_array(prev_pkt_ptr, nb_prev_pkt,
326  pkt->channel_id)) < 0)
327  return ret;
328  prev_pkt = *prev_pkt_ptr;
329 
330  //if channel_id = 0, this is first presentation of prev_pkt, send full hdr.
331  use_delta = prev_pkt[pkt->channel_id].channel_id &&
332  pkt->extra == prev_pkt[pkt->channel_id].extra &&
333  pkt->timestamp >= prev_pkt[pkt->channel_id].timestamp;
334 
335  timestamp = pkt->timestamp;
336  if (use_delta) {
337  timestamp -= prev_pkt[pkt->channel_id].timestamp;
338  }
339  if (timestamp >= 0xFFFFFF) {
340  pkt->ts_field = 0xFFFFFF;
341  } else {
342  pkt->ts_field = timestamp;
343  }
344 
345  if (use_delta) {
346  if (pkt->type == prev_pkt[pkt->channel_id].type &&
347  pkt->size == prev_pkt[pkt->channel_id].size) {
348  mode = RTMP_PS_FOURBYTES;
349  if (pkt->ts_field == prev_pkt[pkt->channel_id].ts_field)
350  mode = RTMP_PS_ONEBYTE;
351  } else {
352  mode = RTMP_PS_EIGHTBYTES;
353  }
354  }
355 
356  if (pkt->channel_id < 64) {
357  bytestream_put_byte(&p, pkt->channel_id | (mode << 6));
358  } else if (pkt->channel_id < 64 + 256) {
359  bytestream_put_byte(&p, 0 | (mode << 6));
360  bytestream_put_byte(&p, pkt->channel_id - 64);
361  } else {
362  bytestream_put_byte(&p, 1 | (mode << 6));
363  bytestream_put_le16(&p, pkt->channel_id - 64);
364  }
365  if (mode != RTMP_PS_ONEBYTE) {
366  bytestream_put_be24(&p, pkt->ts_field);
367  if (mode != RTMP_PS_FOURBYTES) {
368  bytestream_put_be24(&p, pkt->size);
369  bytestream_put_byte(&p, pkt->type);
370  if (mode == RTMP_PS_TWELVEBYTES)
371  bytestream_put_le32(&p, pkt->extra);
372  }
373  }
374  if (pkt->ts_field == 0xFFFFFF)
375  bytestream_put_be32(&p, timestamp);
376  // save history
377  prev_pkt[pkt->channel_id].channel_id = pkt->channel_id;
378  prev_pkt[pkt->channel_id].type = pkt->type;
379  prev_pkt[pkt->channel_id].size = pkt->size;
380  prev_pkt[pkt->channel_id].timestamp = pkt->timestamp;
381  prev_pkt[pkt->channel_id].ts_field = pkt->ts_field;
382  prev_pkt[pkt->channel_id].extra = pkt->extra;
383 
384  if ((ret = ffurl_write(h, pkt_hdr, p - pkt_hdr)) < 0)
385  return ret;
386  written = p - pkt_hdr + pkt->size;
387  while (off < pkt->size) {
388  int towrite = FFMIN(chunk_size, pkt->size - off);
389  if ((ret = ffurl_write(h, pkt->data + off, towrite)) < 0)
390  return ret;
391  off += towrite;
392  if (off < pkt->size) {
393  uint8_t marker = 0xC0 | pkt->channel_id;
394  if ((ret = ffurl_write(h, &marker, 1)) < 0)
395  return ret;
396  written++;
397  if (pkt->ts_field == 0xFFFFFF) {
398  uint8_t ts_header[4];
399  AV_WB32(ts_header, timestamp);
400  if ((ret = ffurl_write(h, ts_header, 4)) < 0)
401  return ret;
402  written += 4;
403  }
404  }
405  }
406  return written;
407 }
408 
409 int ff_rtmp_packet_create(RTMPPacket *pkt, int channel_id, RTMPPacketType type,
410  int timestamp, int size)
411 {
412  if (size) {
413  pkt->data = av_realloc(NULL, size);
414  if (!pkt->data)
415  return AVERROR(ENOMEM);
416  }
417  pkt->size = size;
418  pkt->channel_id = channel_id;
419  pkt->type = type;
420  pkt->timestamp = timestamp;
421  pkt->extra = 0;
422  pkt->ts_field = 0;
423 
424  return 0;
425 }
426 
428 {
429  if (!pkt)
430  return;
431  av_freep(&pkt->data);
432  pkt->size = 0;
433 }
434 
435 int ff_amf_tag_size(const uint8_t *data, const uint8_t *data_end)
436 {
437  const uint8_t *base = data;
438  AMFDataType type;
439  unsigned nb = -1;
440  int parse_key = 1;
441 
442  if (data >= data_end)
443  return -1;
444  switch ((type = *data++)) {
445  case AMF_DATA_TYPE_NUMBER: return 9;
446  case AMF_DATA_TYPE_BOOL: return 2;
447  case AMF_DATA_TYPE_STRING: return 3 + AV_RB16(data);
448  case AMF_DATA_TYPE_LONG_STRING: return 5 + AV_RB32(data);
449  case AMF_DATA_TYPE_NULL: return 1;
450  case AMF_DATA_TYPE_ARRAY:
451  parse_key = 0;
453  nb = bytestream_get_be32(&data);
455  while (nb-- > 0 || type != AMF_DATA_TYPE_ARRAY) {
456  int t;
457  if (parse_key) {
458  int size = bytestream_get_be16(&data);
459  if (!size) {
460  data++;
461  break;
462  }
463  if (size < 0 || size >= data_end - data)
464  return -1;
465  data += size;
466  }
467  t = ff_amf_tag_size(data, data_end);
468  if (t < 0 || t >= data_end - data)
469  return -1;
470  data += t;
471  }
472  return data - base;
473  case AMF_DATA_TYPE_OBJECT_END: return 1;
474  default: return -1;
475  }
476 }
477 
478 int ff_amf_get_field_value(const uint8_t *data, const uint8_t *data_end,
479  const uint8_t *name, uint8_t *dst, int dst_size)
480 {
481  int namelen = strlen(name);
482  int len;
483 
484  while (*data != AMF_DATA_TYPE_OBJECT && data < data_end) {
485  len = ff_amf_tag_size(data, data_end);
486  if (len < 0)
487  len = data_end - data;
488  data += len;
489  }
490  if (data_end - data < 3)
491  return -1;
492  data++;
493  for (;;) {
494  int size = bytestream_get_be16(&data);
495  if (!size)
496  break;
497  if (size < 0 || size >= data_end - data)
498  return -1;
499  data += size;
500  if (size == namelen && !memcmp(data-size, name, namelen)) {
501  switch (*data++) {
503  snprintf(dst, dst_size, "%g", av_int2double(AV_RB64(data)));
504  break;
505  case AMF_DATA_TYPE_BOOL:
506  snprintf(dst, dst_size, "%s", *data ? "true" : "false");
507  break;
509  len = bytestream_get_be16(&data);
510  av_strlcpy(dst, data, FFMIN(len+1, dst_size));
511  break;
512  default:
513  return -1;
514  }
515  return 0;
516  }
517  len = ff_amf_tag_size(data, data_end);
518  if (len < 0 || len >= data_end - data)
519  return -1;
520  data += len;
521  }
522  return -1;
523 }
524 
525 static const char* rtmp_packet_type(int type)
526 {
527  switch (type) {
528  case RTMP_PT_CHUNK_SIZE: return "chunk size";
529  case RTMP_PT_BYTES_READ: return "bytes read";
530  case RTMP_PT_PING: return "ping";
531  case RTMP_PT_SERVER_BW: return "server bandwidth";
532  case RTMP_PT_CLIENT_BW: return "client bandwidth";
533  case RTMP_PT_AUDIO: return "audio packet";
534  case RTMP_PT_VIDEO: return "video packet";
535  case RTMP_PT_FLEX_STREAM: return "Flex shared stream";
536  case RTMP_PT_FLEX_OBJECT: return "Flex shared object";
537  case RTMP_PT_FLEX_MESSAGE: return "Flex shared message";
538  case RTMP_PT_NOTIFY: return "notification";
539  case RTMP_PT_SHARED_OBJ: return "shared object";
540  case RTMP_PT_INVOKE: return "invoke";
541  case RTMP_PT_METADATA: return "metadata";
542  default: return "unknown";
543  }
544 }
545 
546 static void amf_tag_contents(void *ctx, const uint8_t *data,
547  const uint8_t *data_end)
548 {
549  unsigned int size, nb = -1;
550  char buf[1024];
551  AMFDataType type;
552  int parse_key = 1;
553 
554  if (data >= data_end)
555  return;
556  switch ((type = *data++)) {
558  av_log(ctx, AV_LOG_DEBUG, " number %g\n", av_int2double(AV_RB64(data)));
559  return;
560  case AMF_DATA_TYPE_BOOL:
561  av_log(ctx, AV_LOG_DEBUG, " bool %d\n", *data);
562  return;
565  if (type == AMF_DATA_TYPE_STRING) {
566  size = bytestream_get_be16(&data);
567  } else {
568  size = bytestream_get_be32(&data);
569  }
570  size = FFMIN(size, sizeof(buf) - 1);
571  memcpy(buf, data, size);
572  buf[size] = 0;
573  av_log(ctx, AV_LOG_DEBUG, " string '%s'\n", buf);
574  return;
575  case AMF_DATA_TYPE_NULL:
576  av_log(ctx, AV_LOG_DEBUG, " NULL\n");
577  return;
578  case AMF_DATA_TYPE_ARRAY:
579  parse_key = 0;
581  nb = bytestream_get_be32(&data);
583  av_log(ctx, AV_LOG_DEBUG, " {\n");
584  while (nb-- > 0 || type != AMF_DATA_TYPE_ARRAY) {
585  int t;
586  if (parse_key) {
587  size = bytestream_get_be16(&data);
588  size = FFMIN(size, sizeof(buf) - 1);
589  if (!size) {
590  av_log(ctx, AV_LOG_DEBUG, " }\n");
591  data++;
592  break;
593  }
594  memcpy(buf, data, size);
595  buf[size] = 0;
596  if (size >= data_end - data)
597  return;
598  data += size;
599  av_log(ctx, AV_LOG_DEBUG, " %s: ", buf);
600  }
601  amf_tag_contents(ctx, data, data_end);
602  t = ff_amf_tag_size(data, data_end);
603  if (t < 0 || t >= data_end - data)
604  return;
605  data += t;
606  }
607  return;
609  av_log(ctx, AV_LOG_DEBUG, " }\n");
610  return;
611  default:
612  return;
613  }
614 }
615 
617 {
618  av_log(ctx, AV_LOG_DEBUG, "RTMP packet type '%s'(%d) for channel %d, timestamp %d, extra field %d size %d\n",
619  rtmp_packet_type(p->type), p->type, p->channel_id, p->timestamp, p->extra, p->size);
620  if (p->type == RTMP_PT_INVOKE || p->type == RTMP_PT_NOTIFY) {
621  uint8_t *src = p->data, *src_end = p->data + p->size;
622  while (src < src_end) {
623  int sz;
624  amf_tag_contents(ctx, src, src_end);
625  sz = ff_amf_tag_size(src, src_end);
626  if (sz < 0)
627  break;
628  src += sz;
629  }
630  } else if (p->type == RTMP_PT_SERVER_BW){
631  av_log(ctx, AV_LOG_DEBUG, "Server BW = %d\n", AV_RB32(p->data));
632  } else if (p->type == RTMP_PT_CLIENT_BW){
633  av_log(ctx, AV_LOG_DEBUG, "Client BW = %d\n", AV_RB32(p->data));
634  } else if (p->type != RTMP_PT_AUDIO && p->type != RTMP_PT_VIDEO && p->type != RTMP_PT_METADATA) {
635  int i;
636  for (i = 0; i < p->size; i++)
637  av_log(ctx, AV_LOG_DEBUG, " %02X", p->data[i]);
638  av_log(ctx, AV_LOG_DEBUG, "\n");
639  }
640 }
641 
642 int ff_amf_match_string(const uint8_t *data, int size, const char *str)
643 {
644  int len = strlen(str);
645  int amf_len, type;
646 
647  if (size < 1)
648  return 0;
649 
650  type = *data++;
651 
652  if (type != AMF_DATA_TYPE_LONG_STRING &&
653  type != AMF_DATA_TYPE_STRING)
654  return 0;
655 
656  if (type == AMF_DATA_TYPE_LONG_STRING) {
657  if ((size -= 4 + 1) < 0)
658  return 0;
659  amf_len = bytestream_get_be32(&data);
660  } else {
661  if ((size -= 2 + 1) < 0)
662  return 0;
663  amf_len = bytestream_get_be16(&data);
664  }
665 
666  if (amf_len > size)
667  return 0;
668 
669  if (amf_len != len)
670  return 0;
671 
672  return !memcmp(data, str, len);
673 }
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:642
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:297
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:130
#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:257
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
av_log(ac->avr, AV_LOG_TRACE, "%d samples - audio_convert: %s to %s (%s)\, len, av_get_sample_fmt_name(ac->in_fmt), av_get_sample_fmt_name(ac->out_fmt), use_generic ? ac->func_descr_generic :ac->func_descr)
#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:435
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
#define AV_WB32(p, val)
Definition: intreadwrite.h:246
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:202
ping
Definition: rtmppkt.h:50
static void amf_tag_contents(void *ctx, const uint8_t *data, const uint8_t *data_end)
Definition: rtmppkt.c:546
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 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:616
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
#define src
Definition: vp8dsp.c:254
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:124
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:145
audio packet
Definition: rtmppkt.h:53
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
const char * name
Definition: qsvenc.c:44
#define FFMIN(a, b)
Definition: common.h:66
void ff_rtmp_packet_destroy(RTMPPacket *pkt)
Free RTMP packet.
Definition: rtmppkt.c:427
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:478
AVFormatContext * ctx
Definition: movenc.c:48
#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:312
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:38
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:409
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:525
int offset
amount of data read so far
Definition: rtmppkt.h:85
Main libavformat public API header.
Flex shared stream.
Definition: rtmppkt.h:55
void * av_realloc(void *ptr, size_t size)
Allocate or reallocate a block of memory.
Definition: mem.c:117
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:250
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:161
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:243
FLV metadata.
Definition: rtmppkt.h:61