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rtmppkt.c
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1 /*
2  * RTMP input format
3  * Copyright (c) 2009 Konstantin Shishkov
4  *
5  * This file is part of FFmpeg.
6  *
7  * FFmpeg 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  * FFmpeg 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 FFmpeg; 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 
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 
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  p->data = NULL;
291  return AVERROR(EAGAIN);
292  }
293 
294  prev_pkt[channel_id].read = 0; // read complete; reset if needed
295  return p->read;
296 }
297 
299  RTMPPacket **prev_pkt, int *nb_prev_pkt,
300  uint8_t hdr)
301 {
302  while (1) {
303  int ret = rtmp_packet_read_one_chunk(h, p, chunk_size, prev_pkt,
304  nb_prev_pkt, hdr);
305  if (ret > 0 || ret != AVERROR(EAGAIN))
306  return ret;
307 
308  if (ffurl_read(h, &hdr, 1) != 1)
309  return AVERROR(EIO);
310  }
311 }
312 
314  int chunk_size, RTMPPacket **prev_pkt_ptr,
315  int *nb_prev_pkt)
316 {
317  uint8_t pkt_hdr[16], *p = pkt_hdr;
319  int off = 0;
320  int written = 0;
321  int ret;
322  RTMPPacket *prev_pkt;
323  int use_delta; // flag if using timestamp delta, not RTMP_PS_TWELVEBYTES
324  uint32_t timestamp; // full 32-bit timestamp or delta value
325 
326  if ((ret = ff_rtmp_check_alloc_array(prev_pkt_ptr, nb_prev_pkt,
327  pkt->channel_id)) < 0)
328  return ret;
329  prev_pkt = *prev_pkt_ptr;
330 
331  //if channel_id = 0, this is first presentation of prev_pkt, send full hdr.
332  use_delta = prev_pkt[pkt->channel_id].channel_id &&
333  pkt->extra == prev_pkt[pkt->channel_id].extra &&
334  pkt->timestamp >= prev_pkt[pkt->channel_id].timestamp;
335 
336  timestamp = pkt->timestamp;
337  if (use_delta) {
338  timestamp -= prev_pkt[pkt->channel_id].timestamp;
339  }
340  if (timestamp >= 0xFFFFFF) {
341  pkt->ts_field = 0xFFFFFF;
342  } else {
343  pkt->ts_field = timestamp;
344  }
345 
346  if (use_delta) {
347  if (pkt->type == prev_pkt[pkt->channel_id].type &&
348  pkt->size == prev_pkt[pkt->channel_id].size) {
349  mode = RTMP_PS_FOURBYTES;
350  if (pkt->ts_field == prev_pkt[pkt->channel_id].ts_field)
351  mode = RTMP_PS_ONEBYTE;
352  } else {
353  mode = RTMP_PS_EIGHTBYTES;
354  }
355  }
356 
357  if (pkt->channel_id < 64) {
358  bytestream_put_byte(&p, pkt->channel_id | (mode << 6));
359  } else if (pkt->channel_id < 64 + 256) {
360  bytestream_put_byte(&p, 0 | (mode << 6));
361  bytestream_put_byte(&p, pkt->channel_id - 64);
362  } else {
363  bytestream_put_byte(&p, 1 | (mode << 6));
364  bytestream_put_le16(&p, pkt->channel_id - 64);
365  }
366  if (mode != RTMP_PS_ONEBYTE) {
367  bytestream_put_be24(&p, pkt->ts_field);
368  if (mode != RTMP_PS_FOURBYTES) {
369  bytestream_put_be24(&p, pkt->size);
370  bytestream_put_byte(&p, pkt->type);
371  if (mode == RTMP_PS_TWELVEBYTES)
372  bytestream_put_le32(&p, pkt->extra);
373  }
374  }
375  if (pkt->ts_field == 0xFFFFFF)
376  bytestream_put_be32(&p, timestamp);
377  // save history
378  prev_pkt[pkt->channel_id].channel_id = pkt->channel_id;
379  prev_pkt[pkt->channel_id].type = pkt->type;
380  prev_pkt[pkt->channel_id].size = pkt->size;
381  prev_pkt[pkt->channel_id].timestamp = pkt->timestamp;
382  prev_pkt[pkt->channel_id].ts_field = pkt->ts_field;
383  prev_pkt[pkt->channel_id].extra = pkt->extra;
384 
385  if ((ret = ffurl_write(h, pkt_hdr, p - pkt_hdr)) < 0)
386  return ret;
387  written = p - pkt_hdr + pkt->size;
388  while (off < pkt->size) {
389  int towrite = FFMIN(chunk_size, pkt->size - off);
390  if ((ret = ffurl_write(h, pkt->data + off, towrite)) < 0)
391  return ret;
392  off += towrite;
393  if (off < pkt->size) {
394  uint8_t marker = 0xC0 | pkt->channel_id;
395  if ((ret = ffurl_write(h, &marker, 1)) < 0)
396  return ret;
397  written++;
398  if (pkt->ts_field == 0xFFFFFF) {
399  uint8_t ts_header[4];
400  AV_WB32(ts_header, timestamp);
401  if ((ret = ffurl_write(h, ts_header, 4)) < 0)
402  return ret;
403  written += 4;
404  }
405  }
406  }
407  return written;
408 }
409 
411  int timestamp, int size)
412 {
413  if (size) {
414  pkt->data = av_realloc(NULL, size);
415  if (!pkt->data)
416  return AVERROR(ENOMEM);
417  }
418  pkt->size = size;
419  pkt->channel_id = channel_id;
420  pkt->type = type;
421  pkt->timestamp = timestamp;
422  pkt->extra = 0;
423  pkt->ts_field = 0;
424 
425  return 0;
426 }
427 
429 {
430  if (!pkt)
431  return;
432  av_freep(&pkt->data);
433  pkt->size = 0;
434 }
435 
436 int ff_amf_tag_size(const uint8_t *data, const uint8_t *data_end)
437 {
438  const uint8_t *base = data;
440  unsigned nb = -1;
441  int parse_key = 1;
442 
443  if (data >= data_end)
444  return -1;
445  switch ((type = *data++)) {
446  case AMF_DATA_TYPE_NUMBER: return 9;
447  case AMF_DATA_TYPE_BOOL: return 2;
448  case AMF_DATA_TYPE_STRING: return 3 + AV_RB16(data);
449  case AMF_DATA_TYPE_LONG_STRING: return 5 + AV_RB32(data);
450  case AMF_DATA_TYPE_NULL: return 1;
451  case AMF_DATA_TYPE_DATE: return 11;
452  case AMF_DATA_TYPE_ARRAY:
453  parse_key = 0;
455  nb = bytestream_get_be32(&data);
457  while (nb-- > 0 || type != AMF_DATA_TYPE_ARRAY) {
458  int t;
459  if (parse_key) {
460  int size = bytestream_get_be16(&data);
461  if (!size) {
462  data++;
463  break;
464  }
465  if (size < 0 || size >= data_end - data)
466  return -1;
467  data += size;
468  }
469  t = ff_amf_tag_size(data, data_end);
470  if (t < 0 || t >= data_end - data)
471  return -1;
472  data += t;
473  }
474  return data - base;
475  case AMF_DATA_TYPE_OBJECT_END: return 1;
476  default: return -1;
477  }
478 }
479 
480 int ff_amf_get_field_value(const uint8_t *data, const uint8_t *data_end,
481  const uint8_t *name, uint8_t *dst, int dst_size)
482 {
483  int namelen = strlen(name);
484  int len;
485 
486  while (*data != AMF_DATA_TYPE_OBJECT && data < data_end) {
487  len = ff_amf_tag_size(data, data_end);
488  if (len < 0)
489  len = data_end - data;
490  data += len;
491  }
492  if (data_end - data < 3)
493  return -1;
494  data++;
495  for (;;) {
496  int size = bytestream_get_be16(&data);
497  if (!size)
498  break;
499  if (size < 0 || size >= data_end - data)
500  return -1;
501  data += size;
502  if (size == namelen && !memcmp(data-size, name, namelen)) {
503  switch (*data++) {
505  snprintf(dst, dst_size, "%g", av_int2double(AV_RB64(data)));
506  break;
507  case AMF_DATA_TYPE_BOOL:
508  snprintf(dst, dst_size, "%s", *data ? "true" : "false");
509  break;
511  len = bytestream_get_be16(&data);
512  av_strlcpy(dst, data, FFMIN(len+1, dst_size));
513  break;
514  default:
515  return -1;
516  }
517  return 0;
518  }
519  len = ff_amf_tag_size(data, data_end);
520  if (len < 0 || len >= data_end - data)
521  return -1;
522  data += len;
523  }
524  return -1;
525 }
526 
527 static const char* rtmp_packet_type(int type)
528 {
529  switch (type) {
530  case RTMP_PT_CHUNK_SIZE: return "chunk size";
531  case RTMP_PT_BYTES_READ: return "bytes read";
532  case RTMP_PT_PING: return "ping";
533  case RTMP_PT_SERVER_BW: return "server bandwidth";
534  case RTMP_PT_CLIENT_BW: return "client bandwidth";
535  case RTMP_PT_AUDIO: return "audio packet";
536  case RTMP_PT_VIDEO: return "video packet";
537  case RTMP_PT_FLEX_STREAM: return "Flex shared stream";
538  case RTMP_PT_FLEX_OBJECT: return "Flex shared object";
539  case RTMP_PT_FLEX_MESSAGE: return "Flex shared message";
540  case RTMP_PT_NOTIFY: return "notification";
541  case RTMP_PT_SHARED_OBJ: return "shared object";
542  case RTMP_PT_INVOKE: return "invoke";
543  case RTMP_PT_METADATA: return "metadata";
544  default: return "unknown";
545  }
546 }
547 
548 static void amf_tag_contents(void *ctx, const uint8_t *data,
549  const uint8_t *data_end)
550 {
551  unsigned int size, nb = -1;
552  char buf[1024];
554  int parse_key = 1;
555 
556  if (data >= data_end)
557  return;
558  switch ((type = *data++)) {
560  av_log(ctx, AV_LOG_DEBUG, " number %g\n", av_int2double(AV_RB64(data)));
561  return;
562  case AMF_DATA_TYPE_BOOL:
563  av_log(ctx, AV_LOG_DEBUG, " bool %d\n", *data);
564  return;
567  if (type == AMF_DATA_TYPE_STRING) {
568  size = bytestream_get_be16(&data);
569  } else {
570  size = bytestream_get_be32(&data);
571  }
572  size = FFMIN(size, sizeof(buf) - 1);
573  memcpy(buf, data, size);
574  buf[size] = 0;
575  av_log(ctx, AV_LOG_DEBUG, " string '%s'\n", buf);
576  return;
577  case AMF_DATA_TYPE_NULL:
578  av_log(ctx, AV_LOG_DEBUG, " NULL\n");
579  return;
580  case AMF_DATA_TYPE_ARRAY:
581  parse_key = 0;
583  nb = bytestream_get_be32(&data);
585  av_log(ctx, AV_LOG_DEBUG, " {\n");
586  while (nb-- > 0 || type != AMF_DATA_TYPE_ARRAY) {
587  int t;
588  if (parse_key) {
589  size = bytestream_get_be16(&data);
590  size = FFMIN(size, sizeof(buf) - 1);
591  if (!size) {
592  av_log(ctx, AV_LOG_DEBUG, " }\n");
593  data++;
594  break;
595  }
596  memcpy(buf, data, size);
597  buf[size] = 0;
598  if (size >= data_end - data)
599  return;
600  data += size;
601  av_log(ctx, AV_LOG_DEBUG, " %s: ", buf);
602  }
603  amf_tag_contents(ctx, data, data_end);
604  t = ff_amf_tag_size(data, data_end);
605  if (t < 0 || t >= data_end - data)
606  return;
607  data += t;
608  }
609  return;
611  av_log(ctx, AV_LOG_DEBUG, " }\n");
612  return;
613  default:
614  return;
615  }
616 }
617 
619 {
620  av_log(ctx, AV_LOG_DEBUG, "RTMP packet type '%s'(%d) for channel %d, timestamp %d, extra field %d size %d\n",
621  rtmp_packet_type(p->type), p->type, p->channel_id, p->timestamp, p->extra, p->size);
622  if (p->type == RTMP_PT_INVOKE || p->type == RTMP_PT_NOTIFY) {
623  uint8_t *src = p->data, *src_end = p->data + p->size;
624  while (src < src_end) {
625  int sz;
626  amf_tag_contents(ctx, src, src_end);
627  sz = ff_amf_tag_size(src, src_end);
628  if (sz < 0)
629  break;
630  src += sz;
631  }
632  } else if (p->type == RTMP_PT_SERVER_BW){
633  av_log(ctx, AV_LOG_DEBUG, "Server BW = %d\n", AV_RB32(p->data));
634  } else if (p->type == RTMP_PT_CLIENT_BW){
635  av_log(ctx, AV_LOG_DEBUG, "Client BW = %d\n", AV_RB32(p->data));
636  } else if (p->type != RTMP_PT_AUDIO && p->type != RTMP_PT_VIDEO && p->type != RTMP_PT_METADATA) {
637  int i;
638  for (i = 0; i < p->size; i++)
639  av_log(ctx, AV_LOG_DEBUG, " %02X", p->data[i]);
640  av_log(ctx, AV_LOG_DEBUG, "\n");
641  }
642 }
643 
644 int ff_amf_match_string(const uint8_t *data, int size, const char *str)
645 {
646  int len = strlen(str);
647  int amf_len, type;
648 
649  if (size < 1)
650  return 0;
651 
652  type = *data++;
653 
654  if (type != AMF_DATA_TYPE_LONG_STRING &&
655  type != AMF_DATA_TYPE_STRING)
656  return 0;
657 
658  if (type == AMF_DATA_TYPE_LONG_STRING) {
659  if ((size -= 4 + 1) < 0)
660  return 0;
661  amf_len = bytestream_get_be32(&data);
662  } else {
663  if ((size -= 2 + 1) < 0)
664  return 0;
665  amf_len = bytestream_get_be16(&data);
666  }
667 
668  if (amf_len > size)
669  return 0;
670 
671  if (amf_len != len)
672  return 0;
673 
674  return !memcmp(data, str, len);
675 }
#define NULL
Definition: coverity.c:32
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:644
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:298
const char const char void * val
Definition: avisynth_c.h:771
video packet
Definition: rtmppkt.h:54
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
int ff_amf_read_null(GetByteContext *bc)
Read AMF NULL value.
Definition: rtmppkt.c:131
void * av_realloc(void *ptr, size_t size)
Allocate, reallocate, or free a block of memory.
Definition: mem.c:135
ptrdiff_t const GLvoid * data
Definition: opengl_enc.c:101
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:182
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:421
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
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:436
static av_always_inline uint64_t av_double2int(double f)
Reinterpret a double as a 64-bit integer.
Definition: intfloat.h:70
static AVPacket pkt
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_WL32 unsigned int_TMPL AV_WL24 unsigned int_TMPL AV_WL16 uint64_t_TMPL AV_WB64 unsigned int_TMPL AV_WB32 unsigned int_TMPL AV_WB24 unsigned int_TMPL AV_RB16
Definition: bytestream.h:87
#define src
Definition: vp8dsp.c:254
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_WL32 unsigned int_TMPL AV_WL24 unsigned int_TMPL AV_RL16
Definition: bytestream.h:87
RTMPPacketType type
packet payload type
Definition: rtmppkt.h:79
ping
Definition: rtmppkt.h:50
static void amf_tag_contents(void *ctx, const uint8_t *data, const uint8_t *data_end)
Definition: rtmppkt.c:548
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
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_WL32 unsigned int_TMPL AV_WL24 unsigned int_TMPL AV_WL16 uint64_t_TMPL AV_WB64 unsigned int_TMPL AV_RB32
Definition: bytestream.h:87
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:618
AMFDataType
Definition: flv.h:122
ptrdiff_t size
Definition: opengl_enc.c:101
void ff_amf_write_object_end(uint8_t **dst)
Write marker for end of AMF object to buffer.
Definition: rtmppkt.c:79
void * av_realloc_array(void *ptr, size_t nmemb, size_t size)
Definition: mem.c:184
#define av_log(a,...)
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 AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
packet has 4-byte header
Definition: rtmppkt.h:70
#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:263
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:197
audio packet
Definition: rtmppkt.h:53
GLsizei GLsizei * length
Definition: opengl_enc.c:115
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:83
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:96
void ff_rtmp_packet_destroy(RTMPPacket *pkt)
Free RTMP packet.
Definition: rtmppkt.c:428
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:480
AVFormatContext * ctx
Definition: movenc.c:48
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:313
Flex shared message.
Definition: rtmppkt.h:57
chunk size change
Definition: rtmppkt.h:48
FLV common header.
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_WL32 unsigned int_TMPL AV_WL24 unsigned int_TMPL AV_WL16 uint64_t_TMPL AV_WB64 unsigned int_TMPL AV_WB32 unsigned int_TMPL AV_RB24
Definition: bytestream.h:87
void * buf
Definition: avisynth_c.h:690
Definition: url.h:38
GLint GLenum type
Definition: opengl_enc.c:105
uint32_t ts_field
24-bit timestamp or increment to the previous one, in milliseconds (latter only for media packets)...
Definition: rtmppkt.h:81
#define AV_WB32(p, v)
Definition: intreadwrite.h:424
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:410
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
#define snprintf
Definition: snprintf.h:34
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:527
int offset
amount of data read so far
Definition: rtmppkt.h:85
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_WL32 unsigned int_TMPL AV_WL24 unsigned int_TMPL AV_WL16 uint64_t_TMPL AV_RB64
Definition: bytestream.h:87
Main libavformat public API header.
Flex shared stream.
Definition: rtmppkt.h:55
channel
Use these values when setting the channel map with ebur128_set_channel().
Definition: ebur128.h:39
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:414
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
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:368
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
#define av_freep(p)
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
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_RL32
Definition: bytestream.h:87
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:407
mode
Use these values in ebur128_init (or'ed).
Definition: ebur128.h:83
FLV metadata.
Definition: rtmppkt.h:61
const char * name
Definition: opengl_enc.c:103