FFmpeg  4.4.6
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  uint64_t read;
90  if (bytestream2_get_byte(bc) != AMF_DATA_TYPE_NUMBER)
91  return AVERROR_INVALIDDATA;
92  read = bytestream2_get_be64(bc);
93  *val = av_int2double(read);
94  return 0;
95 }
96 
98  int strsize, int *length)
99 {
100  int stringlen = 0;
101  int readsize;
102  stringlen = bytestream2_get_be16(bc);
103  if (stringlen + 1 > strsize)
104  return AVERROR(EINVAL);
105  readsize = bytestream2_get_buffer(bc, str, stringlen);
106  if (readsize != stringlen) {
108  "Unable to read as many bytes as AMF string signaled\n");
109  }
110  str[readsize] = '\0';
111  *length = FFMIN(stringlen, readsize);
112  return 0;
113 }
114 
116  int strsize, int *length)
117 {
118  if (bytestream2_get_byte(bc) != AMF_DATA_TYPE_STRING)
119  return AVERROR_INVALIDDATA;
120  return ff_amf_get_string(bc, str, strsize, length);
121 }
122 
124 {
125  if (bytestream2_get_byte(bc) != AMF_DATA_TYPE_NULL)
126  return AVERROR_INVALIDDATA;
127  return 0;
128 }
129 
130 int ff_rtmp_check_alloc_array(RTMPPacket **prev_pkt, int *nb_prev_pkt,
131  int channel)
132 {
133  int nb_alloc;
134  RTMPPacket *ptr;
135  if (channel < *nb_prev_pkt)
136  return 0;
137 
138  nb_alloc = channel + 16;
139  // This can't use the av_reallocp family of functions, since we
140  // would need to free each element in the array before the array
141  // itself is freed.
142  ptr = av_realloc_array(*prev_pkt, nb_alloc, sizeof(**prev_pkt));
143  if (!ptr)
144  return AVERROR(ENOMEM);
145  memset(ptr + *nb_prev_pkt, 0, (nb_alloc - *nb_prev_pkt) * sizeof(*ptr));
146  *prev_pkt = ptr;
147  *nb_prev_pkt = nb_alloc;
148  return 0;
149 }
150 
152  int chunk_size, RTMPPacket **prev_pkt, int *nb_prev_pkt)
153 {
154  uint8_t hdr;
155 
156  if (ffurl_read(h, &hdr, 1) != 1)
157  return AVERROR(EIO);
158 
159  return ff_rtmp_packet_read_internal(h, p, chunk_size, prev_pkt,
160  nb_prev_pkt, hdr);
161 }
162 
164  int chunk_size, RTMPPacket **prev_pkt_ptr,
165  int *nb_prev_pkt, uint8_t hdr)
166 {
167 
168  uint8_t buf[16];
169  int channel_id, timestamp, size;
170  uint32_t ts_field; // non-extended timestamp or delta field
171  uint32_t extra = 0;
172  enum RTMPPacketType type;
173  int written = 0;
174  int ret, toread;
175  RTMPPacket *prev_pkt;
176 
177  written++;
178  channel_id = hdr & 0x3F;
179 
180  if (channel_id < 2) { //special case for channel number >= 64
181  buf[1] = 0;
182  if (ffurl_read_complete(h, buf, channel_id + 1) != channel_id + 1)
183  return AVERROR(EIO);
184  written += channel_id + 1;
185  channel_id = AV_RL16(buf) + 64;
186  }
187  if ((ret = ff_rtmp_check_alloc_array(prev_pkt_ptr, nb_prev_pkt,
188  channel_id)) < 0)
189  return ret;
190  prev_pkt = *prev_pkt_ptr;
191  size = prev_pkt[channel_id].size;
192  type = prev_pkt[channel_id].type;
193  extra = prev_pkt[channel_id].extra;
194 
195  hdr >>= 6; // header size indicator
196  if (hdr == RTMP_PS_ONEBYTE) {
197  ts_field = prev_pkt[channel_id].ts_field;
198  } else {
199  if (ffurl_read_complete(h, buf, 3) != 3)
200  return AVERROR(EIO);
201  written += 3;
202  ts_field = AV_RB24(buf);
203  if (hdr != RTMP_PS_FOURBYTES) {
204  if (ffurl_read_complete(h, buf, 3) != 3)
205  return AVERROR(EIO);
206  written += 3;
207  size = AV_RB24(buf);
208  if (ffurl_read_complete(h, buf, 1) != 1)
209  return AVERROR(EIO);
210  written++;
211  type = buf[0];
212  if (hdr == RTMP_PS_TWELVEBYTES) {
213  if (ffurl_read_complete(h, buf, 4) != 4)
214  return AVERROR(EIO);
215  written += 4;
216  extra = AV_RL32(buf);
217  }
218  }
219  }
220  if (ts_field == 0xFFFFFF) {
221  if (ffurl_read_complete(h, buf, 4) != 4)
222  return AVERROR(EIO);
223  timestamp = AV_RB32(buf);
224  } else {
225  timestamp = ts_field;
226  }
227  if (hdr != RTMP_PS_TWELVEBYTES)
228  timestamp += prev_pkt[channel_id].timestamp;
229 
230  if (prev_pkt[channel_id].read && size != prev_pkt[channel_id].size) {
231  av_log(h, AV_LOG_ERROR, "RTMP packet size mismatch %d != %d\n",
232  size, prev_pkt[channel_id].size);
233  ff_rtmp_packet_destroy(&prev_pkt[channel_id]);
234  prev_pkt[channel_id].read = 0;
235  return AVERROR_INVALIDDATA;
236  }
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  p->data = NULL;
283  return AVERROR(EAGAIN);
284  }
285 
286  prev_pkt[channel_id].read = 0; // read complete; reset if needed
287  return p->read;
288 }
289 
291  RTMPPacket **prev_pkt, int *nb_prev_pkt,
292  uint8_t hdr)
293 {
294  while (1) {
295  int ret = rtmp_packet_read_one_chunk(h, p, chunk_size, prev_pkt,
296  nb_prev_pkt, hdr);
297  if (ret > 0 || ret != AVERROR(EAGAIN))
298  return ret;
299 
300  if (ffurl_read(h, &hdr, 1) != 1)
301  return AVERROR(EIO);
302  }
303 }
304 
306  int chunk_size, RTMPPacket **prev_pkt_ptr,
307  int *nb_prev_pkt)
308 {
309  uint8_t pkt_hdr[16], *p = pkt_hdr;
311  int off = 0;
312  int written = 0;
313  int ret;
314  RTMPPacket *prev_pkt;
315  int use_delta; // flag if using timestamp delta, not RTMP_PS_TWELVEBYTES
316  uint32_t timestamp; // full 32-bit timestamp or delta value
317 
318  if ((ret = ff_rtmp_check_alloc_array(prev_pkt_ptr, nb_prev_pkt,
319  pkt->channel_id)) < 0)
320  return ret;
321  prev_pkt = *prev_pkt_ptr;
322 
323  //if channel_id = 0, this is first presentation of prev_pkt, send full hdr.
324  use_delta = prev_pkt[pkt->channel_id].channel_id &&
325  pkt->extra == prev_pkt[pkt->channel_id].extra &&
326  pkt->timestamp >= prev_pkt[pkt->channel_id].timestamp;
327 
328  timestamp = pkt->timestamp;
329  if (use_delta) {
330  timestamp -= prev_pkt[pkt->channel_id].timestamp;
331  }
332  if (timestamp >= 0xFFFFFF) {
333  pkt->ts_field = 0xFFFFFF;
334  } else {
335  pkt->ts_field = timestamp;
336  }
337 
338  if (use_delta) {
339  if (pkt->type == prev_pkt[pkt->channel_id].type &&
340  pkt->size == prev_pkt[pkt->channel_id].size) {
342  if (pkt->ts_field == prev_pkt[pkt->channel_id].ts_field)
344  } else {
346  }
347  }
348 
349  if (pkt->channel_id < 64) {
350  bytestream_put_byte(&p, pkt->channel_id | (mode << 6));
351  } else if (pkt->channel_id < 64 + 256) {
352  bytestream_put_byte(&p, 0 | (mode << 6));
353  bytestream_put_byte(&p, pkt->channel_id - 64);
354  } else {
355  bytestream_put_byte(&p, 1 | (mode << 6));
356  bytestream_put_le16(&p, pkt->channel_id - 64);
357  }
358  if (mode != RTMP_PS_ONEBYTE) {
359  bytestream_put_be24(&p, pkt->ts_field);
360  if (mode != RTMP_PS_FOURBYTES) {
361  bytestream_put_be24(&p, pkt->size);
362  bytestream_put_byte(&p, pkt->type);
363  if (mode == RTMP_PS_TWELVEBYTES)
364  bytestream_put_le32(&p, pkt->extra);
365  }
366  }
367  if (pkt->ts_field == 0xFFFFFF)
368  bytestream_put_be32(&p, timestamp);
369  // save history
370  prev_pkt[pkt->channel_id].channel_id = pkt->channel_id;
371  prev_pkt[pkt->channel_id].type = pkt->type;
372  prev_pkt[pkt->channel_id].size = pkt->size;
373  prev_pkt[pkt->channel_id].timestamp = pkt->timestamp;
374  prev_pkt[pkt->channel_id].ts_field = pkt->ts_field;
375  prev_pkt[pkt->channel_id].extra = pkt->extra;
376 
377  if ((ret = ffurl_write(h, pkt_hdr, p - pkt_hdr)) < 0)
378  return ret;
379  written = p - pkt_hdr + pkt->size;
380  while (off < pkt->size) {
381  int towrite = FFMIN(chunk_size, pkt->size - off);
382  if ((ret = ffurl_write(h, pkt->data + off, towrite)) < 0)
383  return ret;
384  off += towrite;
385  if (off < pkt->size) {
386  uint8_t marker = 0xC0 | pkt->channel_id;
387  if ((ret = ffurl_write(h, &marker, 1)) < 0)
388  return ret;
389  written++;
390  if (pkt->ts_field == 0xFFFFFF) {
391  uint8_t ts_header[4];
392  AV_WB32(ts_header, timestamp);
393  if ((ret = ffurl_write(h, ts_header, 4)) < 0)
394  return ret;
395  written += 4;
396  }
397  }
398  }
399  return written;
400 }
401 
403  int timestamp, int size)
404 {
405  if (size) {
406  pkt->data = av_realloc(NULL, size);
407  if (!pkt->data)
408  return AVERROR(ENOMEM);
409  }
410  pkt->size = size;
411  pkt->channel_id = channel_id;
412  pkt->type = type;
413  pkt->timestamp = timestamp;
414  pkt->extra = 0;
415  pkt->ts_field = 0;
416 
417  return 0;
418 }
419 
421 {
422  if (!pkt)
423  return;
424  av_freep(&pkt->data);
425  pkt->size = 0;
426 }
427 
429 {
431  unsigned nb = -1;
432 
433  if (bytestream2_get_bytes_left(gb) < 1)
434  return -1;
435 
436  type = bytestream2_get_byte(gb);
437  switch (type) {
439  bytestream2_get_be64(gb);
440  return 0;
441  case AMF_DATA_TYPE_BOOL:
442  bytestream2_get_byte(gb);
443  return 0;
445  bytestream2_skip(gb, bytestream2_get_be16(gb));
446  return 0;
448  bytestream2_skip(gb, bytestream2_get_be32(gb));
449  return 0;
450  case AMF_DATA_TYPE_NULL:
451  return 0;
452  case AMF_DATA_TYPE_DATE:
453  bytestream2_skip(gb, 10);
454  return 0;
455  case AMF_DATA_TYPE_ARRAY:
457  nb = bytestream2_get_be32(gb);
459  while (type != AMF_DATA_TYPE_ARRAY || nb-- > 0) {
460  int t;
461  if (type != AMF_DATA_TYPE_ARRAY) {
462  int size = bytestream2_get_be16(gb);
463  if (!size) {
464  bytestream2_get_byte(gb);
465  break;
466  }
467  if (size < 0 || size >= bytestream2_get_bytes_left(gb))
468  return -1;
469  bytestream2_skip(gb, size);
470  }
471  t = amf_tag_skip(gb);
472  if (t < 0 || bytestream2_get_bytes_left(gb) <= 0)
473  return -1;
474  }
475  return 0;
476  case AMF_DATA_TYPE_OBJECT_END: return 0;
477  default: return -1;
478  }
479 }
480 
481 int ff_amf_tag_size(const uint8_t *data, const uint8_t *data_end)
482 {
483  GetByteContext gb;
484  int ret;
485 
486  if (data >= data_end)
487  return -1;
488 
489  bytestream2_init(&gb, data, data_end - data);
490 
491  ret = amf_tag_skip(&gb);
492  if (ret < 0 || bytestream2_get_bytes_left(&gb) <= 0)
493  return -1;
494  av_assert0(bytestream2_tell(&gb) >= 0 && bytestream2_tell(&gb) <= data_end - data);
495  return bytestream2_tell(&gb);
496 }
497 
499  const uint8_t *name, uint8_t *dst, int dst_size)
500 {
501  int namelen = strlen(name);
502  int len;
503 
504  while (bytestream2_peek_byte(gb) != AMF_DATA_TYPE_OBJECT && bytestream2_get_bytes_left(gb) > 0) {
505  int ret = amf_tag_skip(gb);
506  if (ret < 0)
507  return -1;
508  }
509  if (bytestream2_get_bytes_left(gb) < 3)
510  return -1;
511  bytestream2_get_byte(gb);
512 
513  for (;;) {
514  int size = bytestream2_get_be16(gb);
515  if (!size)
516  break;
517  if (size < 0 || size >= bytestream2_get_bytes_left(gb))
518  return -1;
519  bytestream2_skip(gb, size);
520  if (size == namelen && !memcmp(gb->buffer-size, name, namelen)) {
521  switch (bytestream2_get_byte(gb)) {
523  snprintf(dst, dst_size, "%g", av_int2double(bytestream2_get_be64(gb)));
524  break;
525  case AMF_DATA_TYPE_BOOL:
526  snprintf(dst, dst_size, "%s", bytestream2_get_byte(gb) ? "true" : "false");
527  break;
529  len = bytestream2_get_be16(gb);
530  if (dst_size < 1)
531  return -1;
532  if (dst_size < len + 1)
533  len = dst_size - 1;
534  bytestream2_get_buffer(gb, dst, len);
535  dst[len] = 0;
536  break;
537  default:
538  return -1;
539  }
540  return 0;
541  }
542  len = amf_tag_skip(gb);
543  if (len < 0 || bytestream2_get_bytes_left(gb) <= 0)
544  return -1;
545  }
546  return -1;
547 }
548 
549 int ff_amf_get_field_value(const uint8_t *data, const uint8_t *data_end,
550  const uint8_t *name, uint8_t *dst, int dst_size)
551 {
552  GetByteContext gb;
553 
554  if (data >= data_end)
555  return -1;
556 
557  bytestream2_init(&gb, data, data_end - data);
558 
559  return amf_get_field_value2(&gb, name, dst, dst_size);
560 }
561 
562 #ifdef DEBUG
563 static const char* rtmp_packet_type(int type)
564 {
565  switch (type) {
566  case RTMP_PT_CHUNK_SIZE: return "chunk size";
567  case RTMP_PT_BYTES_READ: return "bytes read";
568  case RTMP_PT_USER_CONTROL: return "user control";
569  case RTMP_PT_WINDOW_ACK_SIZE: return "window acknowledgement size";
570  case RTMP_PT_SET_PEER_BW: return "set peer bandwidth";
571  case RTMP_PT_AUDIO: return "audio packet";
572  case RTMP_PT_VIDEO: return "video packet";
573  case RTMP_PT_FLEX_STREAM: return "Flex shared stream";
574  case RTMP_PT_FLEX_OBJECT: return "Flex shared object";
575  case RTMP_PT_FLEX_MESSAGE: return "Flex shared message";
576  case RTMP_PT_NOTIFY: return "notification";
577  case RTMP_PT_SHARED_OBJ: return "shared object";
578  case RTMP_PT_INVOKE: return "invoke";
579  case RTMP_PT_METADATA: return "metadata";
580  default: return "unknown";
581  }
582 }
583 
584 static void amf_tag_contents(void *ctx, const uint8_t *data,
585  const uint8_t *data_end)
586 {
587  unsigned int size, nb = -1;
588  char buf[1024];
590  int parse_key = 1;
591 
592  if (data >= data_end)
593  return;
594  switch ((type = *data++)) {
596  av_log(ctx, AV_LOG_DEBUG, " number %g\n", av_int2double(AV_RB64(data)));
597  return;
598  case AMF_DATA_TYPE_BOOL:
599  av_log(ctx, AV_LOG_DEBUG, " bool %d\n", *data);
600  return;
603  if (type == AMF_DATA_TYPE_STRING) {
604  size = bytestream_get_be16(&data);
605  } else {
606  size = bytestream_get_be32(&data);
607  }
608  size = FFMIN(size, sizeof(buf) - 1);
609  memcpy(buf, data, size);
610  buf[size] = 0;
611  av_log(ctx, AV_LOG_DEBUG, " string '%s'\n", buf);
612  return;
613  case AMF_DATA_TYPE_NULL:
614  av_log(ctx, AV_LOG_DEBUG, " NULL\n");
615  return;
616  case AMF_DATA_TYPE_ARRAY:
617  parse_key = 0;
619  nb = bytestream_get_be32(&data);
621  av_log(ctx, AV_LOG_DEBUG, " {\n");
622  while (nb-- > 0 || type != AMF_DATA_TYPE_ARRAY) {
623  int t;
624  if (parse_key) {
625  size = bytestream_get_be16(&data);
626  size = FFMIN(size, sizeof(buf) - 1);
627  if (!size) {
628  av_log(ctx, AV_LOG_DEBUG, " }\n");
629  data++;
630  break;
631  }
632  memcpy(buf, data, size);
633  buf[size] = 0;
634  if (size >= data_end - data)
635  return;
636  data += size;
637  av_log(ctx, AV_LOG_DEBUG, " %s: ", buf);
638  }
639  amf_tag_contents(ctx, data, data_end);
640  t = ff_amf_tag_size(data, data_end);
641  if (t < 0 || t >= data_end - data)
642  return;
643  data += t;
644  }
645  return;
647  av_log(ctx, AV_LOG_DEBUG, " }\n");
648  return;
649  default:
650  return;
651  }
652 }
653 
654 void ff_rtmp_packet_dump(void *ctx, RTMPPacket *p)
655 {
656  av_log(ctx, AV_LOG_DEBUG, "RTMP packet type '%s'(%d) for channel %d, timestamp %d, extra field %d size %d\n",
657  rtmp_packet_type(p->type), p->type, p->channel_id, p->timestamp, p->extra, p->size);
658  if (p->type == RTMP_PT_INVOKE || p->type == RTMP_PT_NOTIFY) {
659  uint8_t *src = p->data, *src_end = p->data + p->size;
660  while (src < src_end) {
661  int sz;
662  amf_tag_contents(ctx, src, src_end);
663  sz = ff_amf_tag_size(src, src_end);
664  if (sz < 0)
665  break;
666  src += sz;
667  }
668  } else if (p->type == RTMP_PT_WINDOW_ACK_SIZE) {
669  av_log(ctx, AV_LOG_DEBUG, "Window acknowledgement size = %d\n", AV_RB32(p->data));
670  } else if (p->type == RTMP_PT_SET_PEER_BW) {
671  av_log(ctx, AV_LOG_DEBUG, "Set Peer BW = %d\n", AV_RB32(p->data));
672  } else if (p->type != RTMP_PT_AUDIO && p->type != RTMP_PT_VIDEO && p->type != RTMP_PT_METADATA) {
673  int i;
674  for (i = 0; i < p->size; i++)
675  av_log(ctx, AV_LOG_DEBUG, " %02X", p->data[i]);
676  av_log(ctx, AV_LOG_DEBUG, "\n");
677  }
678 }
679 #endif
680 
681 int ff_amf_match_string(const uint8_t *data, int size, const char *str)
682 {
683  int len = strlen(str);
684  int amf_len, type;
685 
686  if (size < 1)
687  return 0;
688 
689  type = *data++;
690 
693  return 0;
694 
696  if ((size -= 4 + 1) < 0)
697  return 0;
698  amf_len = bytestream_get_be32(&data);
699  } else {
700  if ((size -= 2 + 1) < 0)
701  return 0;
702  amf_len = bytestream_get_be16(&data);
703  }
704 
705  if (amf_len > size)
706  return 0;
707 
708  if (amf_len != len)
709  return 0;
710 
711  return !memcmp(data, str, len);
712 }
static double val(void *priv, double ch)
Definition: aeval.c:76
uint8_t
#define av_assert0(cond)
assert() equivalent, that is always enabled.
Definition: avassert.h:37
Main libavformat public API header.
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:404
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:418
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:411
#define AV_RB24
Definition: intreadwrite.h:64
#define AV_RL16
Definition: intreadwrite.h:42
#define AV_RB32
Definition: intreadwrite.h:130
#define AV_RL32
Definition: intreadwrite.h:146
#define AV_RB64
Definition: intreadwrite.h:164
static av_always_inline unsigned int bytestream2_get_buffer(GetByteContext *g, uint8_t *dst, unsigned int size)
Definition: bytestream.h:267
static av_always_inline void bytestream_put_buffer(uint8_t **b, const uint8_t *src, unsigned int size)
Definition: bytestream.h:372
static av_always_inline int bytestream2_get_bytes_left(GetByteContext *g)
Definition: bytestream.h:158
static av_always_inline void bytestream2_init(GetByteContext *g, const uint8_t *buf, int buf_size)
Definition: bytestream.h:137
static av_always_inline void bytestream2_skip(GetByteContext *g, unsigned int size)
Definition: bytestream.h:168
static av_always_inline int bytestream2_tell(GetByteContext *g)
Definition: bytestream.h:192
#define FFMIN(a, b)
Definition: common.h:105
#define NULL
Definition: coverity.c:32
static int parse_key(DBEContext *s)
Definition: dolby_e.c:616
mode
Use these values in ebur128_init (or'ed).
Definition: ebur128.h:83
channel
Use these values when setting the channel map with ebur128_set_channel().
Definition: ebur128.h:39
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
#define AVERROR(e)
Definition: error.h:43
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:215
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:200
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:194
void * av_realloc(void *ptr, size_t size)
Allocate, reallocate, or free a block of memory.
Definition: mem.c:134
void * av_realloc_array(void *ptr, size_t nmemb, size_t size)
Allocate, reallocate, or free an array.
Definition: mem.c:198
cl_device_type type
int i
Definition: input.c:407
static av_always_inline uint64_t av_double2int(double f)
Reinterpret a double as a 64-bit integer.
Definition: intfloat.h:70
static av_always_inline double av_int2double(uint64_t i)
Reinterpret a 64-bit integer as a double.
Definition: intfloat.h:60
#define AV_WB32(p, v)
Definition: intreadwrite.h:419
FLV common header.
AMFDataType
Definition: flv.h:123
@ AMF_DATA_TYPE_OBJECT_END
Definition: flv.h:132
@ AMF_DATA_TYPE_LONG_STRING
Definition: flv.h:135
@ AMF_DATA_TYPE_OBJECT
Definition: flv.h:127
@ AMF_DATA_TYPE_BOOL
Definition: flv.h:125
@ AMF_DATA_TYPE_NUMBER
Definition: flv.h:124
@ AMF_DATA_TYPE_MIXEDARRAY
Definition: flv.h:131
@ AMF_DATA_TYPE_NULL
Definition: flv.h:128
@ AMF_DATA_TYPE_STRING
Definition: flv.h:126
@ AMF_DATA_TYPE_ARRAY
Definition: flv.h:133
@ AMF_DATA_TYPE_DATE
Definition: flv.h:134
const char data[16]
Definition: mxf.c:142
const char * name
Definition: qsvenc.c:46
void ff_amf_write_string(uint8_t **dst, const char *str)
Write string in AMF format to buffer.
Definition: rtmppkt.c:43
void ff_amf_write_null(uint8_t **dst)
Write AMF NULL value to buffer.
Definition: rtmppkt.c:63
static int amf_tag_skip(GetByteContext *gb)
Definition: rtmppkt.c:428
void ff_amf_write_number(uint8_t **dst, double val)
Write number in AMF format to buffer.
Definition: rtmppkt.c:37
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:151
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:163
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:305
void ff_amf_write_object_start(uint8_t **dst)
Write marker for AMF object to buffer.
Definition: rtmppkt.c:68
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
int ff_amf_get_string(GetByteContext *bc, uint8_t *str, int strsize, int *length)
Get AMF string value.
Definition: rtmppkt.c:97
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:130
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:290
int ff_amf_read_null(GetByteContext *bc)
Read AMF NULL value.
Definition: rtmppkt.c:123
static int amf_get_field_value2(GetByteContext *gb, const uint8_t *name, uint8_t *dst, int dst_size)
Definition: rtmppkt.c:498
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:481
void ff_amf_write_bool(uint8_t **dst, int val)
Write boolean value in AMF format to buffer.
Definition: rtmppkt.c:31
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:549
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:402
void ff_rtmp_packet_destroy(RTMPPacket *pkt)
Free RTMP packet.
Definition: rtmppkt.c:420
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:681
void ff_amf_write_object_end(uint8_t **dst)
Write marker for end of AMF object to buffer.
Definition: rtmppkt.c:79
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_read_string(GetByteContext *bc, uint8_t *str, int strsize, int *length)
Read AMF string value.
Definition: rtmppkt.c:115
int ff_amf_read_number(GetByteContext *bc, double *val)
Read AMF number value.
Definition: rtmppkt.c:87
@ RTMP_PS_TWELVEBYTES
packet has 12-byte header
Definition: rtmppkt.h:68
@ RTMP_PS_EIGHTBYTES
packet has 8-byte header
Definition: rtmppkt.h:69
@ RTMP_PS_FOURBYTES
packet has 4-byte header
Definition: rtmppkt.h:70
@ RTMP_PS_ONEBYTE
packet is really a next chunk of a packet
Definition: rtmppkt.h:71
void ff_rtmp_packet_dump(void *ctx, RTMPPacket *p)
Print information and contents of RTMP packet.
RTMPPacketType
known RTMP packet types
Definition: rtmppkt.h:47
@ RTMP_PT_FLEX_OBJECT
Flex shared object.
Definition: rtmppkt.h:56
@ RTMP_PT_USER_CONTROL
user control
Definition: rtmppkt.h:50
@ RTMP_PT_NOTIFY
some notification
Definition: rtmppkt.h:58
@ RTMP_PT_SHARED_OBJ
shared object
Definition: rtmppkt.h:59
@ RTMP_PT_CHUNK_SIZE
chunk size change
Definition: rtmppkt.h:48
@ RTMP_PT_INVOKE
invoke some stream action
Definition: rtmppkt.h:60
@ RTMP_PT_BYTES_READ
number of bytes read
Definition: rtmppkt.h:49
@ RTMP_PT_SET_PEER_BW
peer bandwidth
Definition: rtmppkt.h:52
@ RTMP_PT_WINDOW_ACK_SIZE
window acknowledgement size
Definition: rtmppkt.h:51
@ RTMP_PT_VIDEO
video packet
Definition: rtmppkt.h:54
@ RTMP_PT_FLEX_STREAM
Flex shared stream.
Definition: rtmppkt.h:55
@ RTMP_PT_METADATA
FLV metadata.
Definition: rtmppkt.h:61
@ RTMP_PT_AUDIO
audio packet
Definition: rtmppkt.h:53
@ RTMP_PT_FLEX_MESSAGE
Flex shared message.
Definition: rtmppkt.h:57
#define snprintf
Definition: snprintf.h:34
int size
Definition: packet.h:370
uint8_t * data
Definition: packet.h:369
const uint8_t * buffer
Definition: bytestream.h:34
structure for holding RTMP packets
Definition: rtmppkt.h:77
int size
packet payload size
Definition: rtmppkt.h:84
uint32_t extra
probably an additional channel ID used during streaming data
Definition: rtmppkt.h:82
RTMPPacketType type
packet payload type
Definition: rtmppkt.h:79
uint32_t ts_field
24-bit timestamp or increment to the previous one, in milliseconds (latter only for media packets)....
Definition: rtmppkt.h:81
uint32_t timestamp
packet full timestamp
Definition: rtmppkt.h:80
uint8_t * data
packet payload
Definition: rtmppkt.h:83
int channel_id
RTMP channel ID (nothing to do with audio/video channels though)
Definition: rtmppkt.h:78
int read
amount read, including headers
Definition: rtmppkt.h:86
int offset
amount of data read so far
Definition: rtmppkt.h:85
Definition: url.h:38
#define av_freep(p)
#define av_log(a,...)
#define src
Definition: vp8dsp.c:255
AVPacket * pkt
Definition: movenc.c:59
AVFormatContext * ctx
Definition: movenc.c:48
int size
unbuffered private I/O API
int len