FFmpeg coverage


Directory: ../../../ffmpeg/
File: src/libavformat/rtmppkt.c
Date: 2024-06-18 05:56:57
Exec Total Coverage
Lines: 0 378 0.0%
Functions: 0 25 0.0%
Branches: 0 205 0.0%

Line Branch Exec Source
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/intfloat.h"
24 #include "libavutil/mem.h"
25
26 #include "rtmppkt.h"
27 #include "flv.h"
28 #include "url.h"
29
30 void ff_amf_write_bool(uint8_t **dst, int val)
31 {
32 bytestream_put_byte(dst, AMF_DATA_TYPE_BOOL);
33 bytestream_put_byte(dst, val);
34 }
35
36 void ff_amf_write_number(uint8_t **dst, double val)
37 {
38 bytestream_put_byte(dst, AMF_DATA_TYPE_NUMBER);
39 bytestream_put_be64(dst, av_double2int(val));
40 }
41
42 void ff_amf_write_array_start(uint8_t **dst, uint32_t length)
43 {
44 bytestream_put_byte(dst, AMF_DATA_TYPE_ARRAY);
45 bytestream_put_be32(dst, length);
46 }
47
48 void ff_amf_write_string(uint8_t **dst, const char *str)
49 {
50 bytestream_put_byte(dst, AMF_DATA_TYPE_STRING);
51 bytestream_put_be16(dst, strlen(str));
52 bytestream_put_buffer(dst, str, strlen(str));
53 }
54
55 void ff_amf_write_string2(uint8_t **dst, const char *str1, const char *str2)
56 {
57 int len1 = 0, len2 = 0;
58 if (str1)
59 len1 = strlen(str1);
60 if (str2)
61 len2 = strlen(str2);
62 bytestream_put_byte(dst, AMF_DATA_TYPE_STRING);
63 bytestream_put_be16(dst, len1 + len2);
64 bytestream_put_buffer(dst, str1, len1);
65 bytestream_put_buffer(dst, str2, len2);
66 }
67
68 void ff_amf_write_null(uint8_t **dst)
69 {
70 bytestream_put_byte(dst, AMF_DATA_TYPE_NULL);
71 }
72
73 void ff_amf_write_object_start(uint8_t **dst)
74 {
75 bytestream_put_byte(dst, AMF_DATA_TYPE_OBJECT);
76 }
77
78 void ff_amf_write_field_name(uint8_t **dst, const char *str)
79 {
80 bytestream_put_be16(dst, strlen(str));
81 bytestream_put_buffer(dst, str, strlen(str));
82 }
83
84 void ff_amf_write_object_end(uint8_t **dst)
85 {
86 /* first two bytes are field name length = 0,
87 * AMF object should end with it and end marker
88 */
89 bytestream_put_be24(dst, AMF_DATA_TYPE_OBJECT_END);
90 }
91
92 int ff_amf_read_number(GetByteContext *bc, double *val)
93 {
94 uint64_t read;
95 if (bytestream2_get_byte(bc) != AMF_DATA_TYPE_NUMBER)
96 return AVERROR_INVALIDDATA;
97 read = bytestream2_get_be64(bc);
98 *val = av_int2double(read);
99 return 0;
100 }
101
102 int ff_amf_get_string(GetByteContext *bc, uint8_t *str,
103 int strsize, int *length)
104 {
105 int stringlen = 0;
106 int readsize;
107 stringlen = bytestream2_get_be16(bc);
108 if (stringlen + 1 > strsize)
109 return AVERROR(EINVAL);
110 readsize = bytestream2_get_buffer(bc, str, stringlen);
111 if (readsize != stringlen) {
112 av_log(NULL, AV_LOG_WARNING,
113 "Unable to read as many bytes as AMF string signaled\n");
114 }
115 str[readsize] = '\0';
116 *length = FFMIN(stringlen, readsize);
117 return 0;
118 }
119
120 int ff_amf_read_string(GetByteContext *bc, uint8_t *str,
121 int strsize, int *length)
122 {
123 if (bytestream2_get_byte(bc) != AMF_DATA_TYPE_STRING)
124 return AVERROR_INVALIDDATA;
125 return ff_amf_get_string(bc, str, strsize, length);
126 }
127
128 int ff_amf_read_null(GetByteContext *bc)
129 {
130 if (bytestream2_get_byte(bc) != AMF_DATA_TYPE_NULL)
131 return AVERROR_INVALIDDATA;
132 return 0;
133 }
134
135 int ff_rtmp_check_alloc_array(RTMPPacket **prev_pkt, int *nb_prev_pkt,
136 int channel)
137 {
138 int nb_alloc;
139 RTMPPacket *ptr;
140 if (channel < *nb_prev_pkt)
141 return 0;
142
143 nb_alloc = channel + 16;
144 // This can't use the av_reallocp family of functions, since we
145 // would need to free each element in the array before the array
146 // itself is freed.
147 ptr = av_realloc_array(*prev_pkt, nb_alloc, sizeof(**prev_pkt));
148 if (!ptr)
149 return AVERROR(ENOMEM);
150 memset(ptr + *nb_prev_pkt, 0, (nb_alloc - *nb_prev_pkt) * sizeof(*ptr));
151 *prev_pkt = ptr;
152 *nb_prev_pkt = nb_alloc;
153 return 0;
154 }
155
156 int ff_rtmp_packet_read(URLContext *h, RTMPPacket *p,
157 int chunk_size, RTMPPacket **prev_pkt, int *nb_prev_pkt)
158 {
159 uint8_t hdr;
160
161 if (ffurl_read(h, &hdr, 1) != 1)
162 return AVERROR(EIO);
163
164 return ff_rtmp_packet_read_internal(h, p, chunk_size, prev_pkt,
165 nb_prev_pkt, hdr);
166 }
167
168 static int rtmp_packet_read_one_chunk(URLContext *h, RTMPPacket *p,
169 int chunk_size, RTMPPacket **prev_pkt_ptr,
170 int *nb_prev_pkt, uint8_t hdr)
171 {
172
173 uint8_t buf[16];
174 int channel_id, timestamp, size;
175 uint32_t ts_field; // non-extended timestamp or delta field
176 uint32_t extra = 0;
177 enum RTMPPacketType type;
178 int written = 0;
179 int ret, toread;
180 RTMPPacket *prev_pkt;
181
182 written++;
183 channel_id = hdr & 0x3F;
184
185 if (channel_id < 2) { //special case for channel number >= 64
186 buf[1] = 0;
187 if (ffurl_read_complete(h, buf, channel_id + 1) != channel_id + 1)
188 return AVERROR(EIO);
189 written += channel_id + 1;
190 channel_id = AV_RL16(buf) + 64;
191 }
192 if ((ret = ff_rtmp_check_alloc_array(prev_pkt_ptr, nb_prev_pkt,
193 channel_id)) < 0)
194 return ret;
195 prev_pkt = *prev_pkt_ptr;
196 size = prev_pkt[channel_id].size;
197 type = prev_pkt[channel_id].type;
198 extra = prev_pkt[channel_id].extra;
199
200 hdr >>= 6; // header size indicator
201 if (hdr == RTMP_PS_ONEBYTE) {
202 ts_field = prev_pkt[channel_id].ts_field;
203 } else {
204 if (ffurl_read_complete(h, buf, 3) != 3)
205 return AVERROR(EIO);
206 written += 3;
207 ts_field = AV_RB24(buf);
208 if (hdr != RTMP_PS_FOURBYTES) {
209 if (ffurl_read_complete(h, buf, 3) != 3)
210 return AVERROR(EIO);
211 written += 3;
212 size = AV_RB24(buf);
213 if (ffurl_read_complete(h, buf, 1) != 1)
214 return AVERROR(EIO);
215 written++;
216 type = buf[0];
217 if (hdr == RTMP_PS_TWELVEBYTES) {
218 if (ffurl_read_complete(h, buf, 4) != 4)
219 return AVERROR(EIO);
220 written += 4;
221 extra = AV_RL32(buf);
222 }
223 }
224 }
225 if (ts_field == 0xFFFFFF) {
226 if (ffurl_read_complete(h, buf, 4) != 4)
227 return AVERROR(EIO);
228 timestamp = AV_RB32(buf);
229 } else {
230 timestamp = ts_field;
231 }
232 if (hdr != RTMP_PS_TWELVEBYTES)
233 timestamp += prev_pkt[channel_id].timestamp;
234
235 if (prev_pkt[channel_id].read && size != prev_pkt[channel_id].size) {
236 av_log(h, AV_LOG_ERROR, "RTMP packet size mismatch %d != %d\n",
237 size, prev_pkt[channel_id].size);
238 ff_rtmp_packet_destroy(&prev_pkt[channel_id]);
239 prev_pkt[channel_id].read = 0;
240 return AVERROR_INVALIDDATA;
241 }
242
243 if (!prev_pkt[channel_id].read) {
244 if ((ret = ff_rtmp_packet_create(p, channel_id, type, timestamp,
245 size)) < 0)
246 return ret;
247 p->read = written;
248 p->offset = 0;
249 prev_pkt[channel_id].ts_field = ts_field;
250 prev_pkt[channel_id].timestamp = timestamp;
251 } else {
252 // previous packet in this channel hasn't completed reading
253 RTMPPacket *prev = &prev_pkt[channel_id];
254 p->data = prev->data;
255 p->size = prev->size;
256 p->channel_id = prev->channel_id;
257 p->type = prev->type;
258 p->ts_field = prev->ts_field;
259 p->extra = prev->extra;
260 p->offset = prev->offset;
261 p->read = prev->read + written;
262 p->timestamp = prev->timestamp;
263 prev->data = NULL;
264 }
265 p->extra = extra;
266 // save history
267 prev_pkt[channel_id].channel_id = channel_id;
268 prev_pkt[channel_id].type = type;
269 prev_pkt[channel_id].size = size;
270 prev_pkt[channel_id].extra = extra;
271 size = size - p->offset;
272
273 toread = FFMIN(size, chunk_size);
274 if (ffurl_read_complete(h, p->data + p->offset, toread) != toread) {
275 ff_rtmp_packet_destroy(p);
276 return AVERROR(EIO);
277 }
278 size -= toread;
279 p->read += toread;
280 p->offset += toread;
281
282 if (size > 0) {
283 RTMPPacket *prev = &prev_pkt[channel_id];
284 prev->data = p->data;
285 prev->read = p->read;
286 prev->offset = p->offset;
287 p->data = NULL;
288 return AVERROR(EAGAIN);
289 }
290
291 prev_pkt[channel_id].read = 0; // read complete; reset if needed
292 return p->read;
293 }
294
295 int ff_rtmp_packet_read_internal(URLContext *h, RTMPPacket *p, int chunk_size,
296 RTMPPacket **prev_pkt, int *nb_prev_pkt,
297 uint8_t hdr)
298 {
299 while (1) {
300 int ret = rtmp_packet_read_one_chunk(h, p, chunk_size, prev_pkt,
301 nb_prev_pkt, hdr);
302 if (ret > 0 || ret != AVERROR(EAGAIN))
303 return ret;
304
305 if (ffurl_read(h, &hdr, 1) != 1)
306 return AVERROR(EIO);
307 }
308 }
309
310 int ff_rtmp_packet_write(URLContext *h, RTMPPacket *pkt,
311 int chunk_size, RTMPPacket **prev_pkt_ptr,
312 int *nb_prev_pkt)
313 {
314 uint8_t pkt_hdr[16], *p = pkt_hdr;
315 int mode = RTMP_PS_TWELVEBYTES;
316 int off = 0;
317 int written = 0;
318 int ret;
319 RTMPPacket *prev_pkt;
320 int use_delta; // flag if using timestamp delta, not RTMP_PS_TWELVEBYTES
321 uint32_t timestamp; // full 32-bit timestamp or delta value
322
323 if ((ret = ff_rtmp_check_alloc_array(prev_pkt_ptr, nb_prev_pkt,
324 pkt->channel_id)) < 0)
325 return ret;
326 prev_pkt = *prev_pkt_ptr;
327
328 //if channel_id = 0, this is first presentation of prev_pkt, send full hdr.
329 use_delta = prev_pkt[pkt->channel_id].channel_id &&
330 pkt->extra == prev_pkt[pkt->channel_id].extra &&
331 pkt->timestamp >= prev_pkt[pkt->channel_id].timestamp;
332
333 timestamp = pkt->timestamp;
334 if (use_delta) {
335 timestamp -= prev_pkt[pkt->channel_id].timestamp;
336 }
337 if (timestamp >= 0xFFFFFF) {
338 pkt->ts_field = 0xFFFFFF;
339 } else {
340 pkt->ts_field = timestamp;
341 }
342
343 if (use_delta) {
344 if (pkt->type == prev_pkt[pkt->channel_id].type &&
345 pkt->size == prev_pkt[pkt->channel_id].size) {
346 mode = RTMP_PS_FOURBYTES;
347 if (pkt->ts_field == prev_pkt[pkt->channel_id].ts_field)
348 mode = RTMP_PS_ONEBYTE;
349 } else {
350 mode = RTMP_PS_EIGHTBYTES;
351 }
352 }
353
354 if (pkt->channel_id < 64) {
355 bytestream_put_byte(&p, pkt->channel_id | (mode << 6));
356 } else if (pkt->channel_id < 64 + 256) {
357 bytestream_put_byte(&p, 0 | (mode << 6));
358 bytestream_put_byte(&p, pkt->channel_id - 64);
359 } else {
360 bytestream_put_byte(&p, 1 | (mode << 6));
361 bytestream_put_le16(&p, pkt->channel_id - 64);
362 }
363 if (mode != RTMP_PS_ONEBYTE) {
364 bytestream_put_be24(&p, pkt->ts_field);
365 if (mode != RTMP_PS_FOURBYTES) {
366 bytestream_put_be24(&p, pkt->size);
367 bytestream_put_byte(&p, pkt->type);
368 if (mode == RTMP_PS_TWELVEBYTES)
369 bytestream_put_le32(&p, pkt->extra);
370 }
371 }
372 if (pkt->ts_field == 0xFFFFFF)
373 bytestream_put_be32(&p, timestamp);
374 // save history
375 prev_pkt[pkt->channel_id].channel_id = pkt->channel_id;
376 prev_pkt[pkt->channel_id].type = pkt->type;
377 prev_pkt[pkt->channel_id].size = pkt->size;
378 prev_pkt[pkt->channel_id].timestamp = pkt->timestamp;
379 prev_pkt[pkt->channel_id].ts_field = pkt->ts_field;
380 prev_pkt[pkt->channel_id].extra = pkt->extra;
381
382 // FIXME:
383 // Writing packets is currently not optimized to minimize system calls.
384 // Since system calls flush on exit which we cannot change in a system-independant way.
385 // We should fix this behavior and by writing packets in a single or in as few as possible system calls.
386 // Protocols like TCP and RTMP should benefit from this when enabling TCP_NODELAY.
387
388 if ((ret = ffurl_write(h, pkt_hdr, p - pkt_hdr)) < 0)
389 return ret;
390 written = p - pkt_hdr + pkt->size;
391 while (off < pkt->size) {
392 int towrite = FFMIN(chunk_size, pkt->size - off);
393 if ((ret = ffurl_write(h, pkt->data + off, towrite)) < 0)
394 return ret;
395 off += towrite;
396 if (off < pkt->size) {
397 uint8_t marker = 0xC0 | pkt->channel_id;
398 if ((ret = ffurl_write(h, &marker, 1)) < 0)
399 return ret;
400 written++;
401 if (pkt->ts_field == 0xFFFFFF) {
402 uint8_t ts_header[4];
403 AV_WB32(ts_header, timestamp);
404 if ((ret = ffurl_write(h, ts_header, 4)) < 0)
405 return ret;
406 written += 4;
407 }
408 }
409 }
410 return written;
411 }
412
413 int ff_rtmp_packet_create(RTMPPacket *pkt, int channel_id, RTMPPacketType type,
414 int timestamp, int size)
415 {
416 if (size) {
417 pkt->data = av_realloc(NULL, size);
418 if (!pkt->data)
419 return AVERROR(ENOMEM);
420 }
421 pkt->size = size;
422 pkt->channel_id = channel_id;
423 pkt->type = type;
424 pkt->timestamp = timestamp;
425 pkt->extra = 0;
426 pkt->ts_field = 0;
427
428 return 0;
429 }
430
431 void ff_rtmp_packet_destroy(RTMPPacket *pkt)
432 {
433 if (!pkt)
434 return;
435 av_freep(&pkt->data);
436 pkt->size = 0;
437 }
438
439 static int amf_tag_skip(GetByteContext *gb)
440 {
441 AMFDataType type;
442 unsigned nb = -1;
443 int parse_key = 1;
444
445 if (bytestream2_get_bytes_left(gb) < 1)
446 return -1;
447
448 type = bytestream2_get_byte(gb);
449 switch (type) {
450 case AMF_DATA_TYPE_NUMBER:
451 bytestream2_get_be64(gb);
452 return 0;
453 case AMF_DATA_TYPE_BOOL:
454 bytestream2_get_byte(gb);
455 return 0;
456 case AMF_DATA_TYPE_STRING:
457 bytestream2_skip(gb, bytestream2_get_be16(gb));
458 return 0;
459 case AMF_DATA_TYPE_LONG_STRING:
460 bytestream2_skip(gb, bytestream2_get_be32(gb));
461 return 0;
462 case AMF_DATA_TYPE_NULL:
463 return 0;
464 case AMF_DATA_TYPE_DATE:
465 bytestream2_skip(gb, 10);
466 return 0;
467 case AMF_DATA_TYPE_ARRAY:
468 parse_key = 0;
469 case AMF_DATA_TYPE_MIXEDARRAY:
470 nb = bytestream2_get_be32(gb);
471 case AMF_DATA_TYPE_OBJECT:
472 while (nb-- > 0 || type != AMF_DATA_TYPE_ARRAY) {
473 int t;
474 if (parse_key) {
475 int size = bytestream2_get_be16(gb);
476 if (!size) {
477 bytestream2_get_byte(gb);
478 break;
479 }
480 if (size < 0 || size >= bytestream2_get_bytes_left(gb))
481 return -1;
482 bytestream2_skip(gb, size);
483 }
484 t = amf_tag_skip(gb);
485 if (t < 0 || bytestream2_get_bytes_left(gb) <= 0)
486 return -1;
487 }
488 return 0;
489 case AMF_DATA_TYPE_OBJECT_END: return 0;
490 default: return -1;
491 }
492 }
493
494 int ff_amf_tag_size(const uint8_t *data, const uint8_t *data_end)
495 {
496 GetByteContext gb;
497 int ret;
498
499 if (data >= data_end)
500 return -1;
501
502 bytestream2_init(&gb, data, data_end - data);
503
504 ret = amf_tag_skip(&gb);
505 if (ret < 0 || bytestream2_get_bytes_left(&gb) <= 0)
506 return -1;
507 av_assert0(bytestream2_tell(&gb) >= 0 && bytestream2_tell(&gb) <= data_end - data);
508 return bytestream2_tell(&gb);
509 }
510
511 static int amf_get_field_value2(GetByteContext *gb,
512 const uint8_t *name, uint8_t *dst, int dst_size)
513 {
514 int namelen = strlen(name);
515 int len;
516
517 while (bytestream2_peek_byte(gb) != AMF_DATA_TYPE_OBJECT && bytestream2_get_bytes_left(gb) > 0) {
518 int ret = amf_tag_skip(gb);
519 if (ret < 0)
520 return -1;
521 }
522 if (bytestream2_get_bytes_left(gb) < 3)
523 return -1;
524 bytestream2_get_byte(gb);
525
526 for (;;) {
527 int size = bytestream2_get_be16(gb);
528 if (!size)
529 break;
530 if (size < 0 || size >= bytestream2_get_bytes_left(gb))
531 return -1;
532 bytestream2_skip(gb, size);
533 if (size == namelen && !memcmp(gb->buffer-size, name, namelen)) {
534 switch (bytestream2_get_byte(gb)) {
535 case AMF_DATA_TYPE_NUMBER:
536 snprintf(dst, dst_size, "%g", av_int2double(bytestream2_get_be64(gb)));
537 break;
538 case AMF_DATA_TYPE_BOOL:
539 snprintf(dst, dst_size, "%s", bytestream2_get_byte(gb) ? "true" : "false");
540 break;
541 case AMF_DATA_TYPE_STRING:
542 len = bytestream2_get_be16(gb);
543 if (dst_size < 1)
544 return -1;
545 if (dst_size < len + 1)
546 len = dst_size - 1;
547 bytestream2_get_buffer(gb, dst, len);
548 dst[len] = 0;
549 break;
550 default:
551 return -1;
552 }
553 return 0;
554 }
555 len = amf_tag_skip(gb);
556 if (len < 0 || bytestream2_get_bytes_left(gb) <= 0)
557 return -1;
558 }
559 return -1;
560 }
561
562 int ff_amf_get_field_value(const uint8_t *data, const uint8_t *data_end,
563 const uint8_t *name, uint8_t *dst, int dst_size)
564 {
565 GetByteContext gb;
566
567 if (data >= data_end)
568 return -1;
569
570 bytestream2_init(&gb, data, data_end - data);
571
572 return amf_get_field_value2(&gb, name, dst, dst_size);
573 }
574
575 #ifdef DEBUG
576 static const char* rtmp_packet_type(int type)
577 {
578 switch (type) {
579 case RTMP_PT_CHUNK_SIZE: return "chunk size";
580 case RTMP_PT_BYTES_READ: return "bytes read";
581 case RTMP_PT_USER_CONTROL: return "user control";
582 case RTMP_PT_WINDOW_ACK_SIZE: return "window acknowledgement size";
583 case RTMP_PT_SET_PEER_BW: return "set peer bandwidth";
584 case RTMP_PT_AUDIO: return "audio packet";
585 case RTMP_PT_VIDEO: return "video packet";
586 case RTMP_PT_FLEX_STREAM: return "Flex shared stream";
587 case RTMP_PT_FLEX_OBJECT: return "Flex shared object";
588 case RTMP_PT_FLEX_MESSAGE: return "Flex shared message";
589 case RTMP_PT_NOTIFY: return "notification";
590 case RTMP_PT_SHARED_OBJ: return "shared object";
591 case RTMP_PT_INVOKE: return "invoke";
592 case RTMP_PT_METADATA: return "metadata";
593 default: return "unknown";
594 }
595 }
596
597 static void amf_tag_contents(void *ctx, const uint8_t *data,
598 const uint8_t *data_end)
599 {
600 unsigned int size, nb = -1;
601 char buf[1024];
602 AMFDataType type;
603 int parse_key = 1;
604
605 if (data >= data_end)
606 return;
607 switch ((type = *data++)) {
608 case AMF_DATA_TYPE_NUMBER:
609 av_log(ctx, AV_LOG_DEBUG, " number %g\n", av_int2double(AV_RB64(data)));
610 return;
611 case AMF_DATA_TYPE_BOOL:
612 av_log(ctx, AV_LOG_DEBUG, " bool %d\n", *data);
613 return;
614 case AMF_DATA_TYPE_STRING:
615 case AMF_DATA_TYPE_LONG_STRING:
616 if (type == AMF_DATA_TYPE_STRING) {
617 size = bytestream_get_be16(&data);
618 } else {
619 size = bytestream_get_be32(&data);
620 }
621 size = FFMIN(size, sizeof(buf) - 1);
622 memcpy(buf, data, size);
623 buf[size] = 0;
624 av_log(ctx, AV_LOG_DEBUG, " string '%s'\n", buf);
625 return;
626 case AMF_DATA_TYPE_NULL:
627 av_log(ctx, AV_LOG_DEBUG, " NULL\n");
628 return;
629 case AMF_DATA_TYPE_ARRAY:
630 parse_key = 0;
631 case AMF_DATA_TYPE_MIXEDARRAY:
632 nb = bytestream_get_be32(&data);
633 case AMF_DATA_TYPE_OBJECT:
634 av_log(ctx, AV_LOG_DEBUG, " {\n");
635 while (nb-- > 0 || type != AMF_DATA_TYPE_ARRAY) {
636 int t;
637 if (parse_key) {
638 size = bytestream_get_be16(&data);
639 size = FFMIN(size, sizeof(buf) - 1);
640 if (!size) {
641 av_log(ctx, AV_LOG_DEBUG, " }\n");
642 data++;
643 break;
644 }
645 memcpy(buf, data, size);
646 buf[size] = 0;
647 if (size >= data_end - data)
648 return;
649 data += size;
650 av_log(ctx, AV_LOG_DEBUG, " %s: ", buf);
651 }
652 amf_tag_contents(ctx, data, data_end);
653 t = ff_amf_tag_size(data, data_end);
654 if (t < 0 || t >= data_end - data)
655 return;
656 data += t;
657 }
658 return;
659 case AMF_DATA_TYPE_OBJECT_END:
660 av_log(ctx, AV_LOG_DEBUG, " }\n");
661 return;
662 default:
663 return;
664 }
665 }
666
667 void ff_rtmp_packet_dump(void *ctx, RTMPPacket *p)
668 {
669 av_log(ctx, AV_LOG_DEBUG, "RTMP packet type '%s'(%d) for channel %d, timestamp %d, extra field %d size %d\n",
670 rtmp_packet_type(p->type), p->type, p->channel_id, p->timestamp, p->extra, p->size);
671 if (p->type == RTMP_PT_INVOKE || p->type == RTMP_PT_NOTIFY) {
672 uint8_t *src = p->data, *src_end = p->data + p->size;
673 while (src < src_end) {
674 int sz;
675 amf_tag_contents(ctx, src, src_end);
676 sz = ff_amf_tag_size(src, src_end);
677 if (sz < 0)
678 break;
679 src += sz;
680 }
681 } else if (p->type == RTMP_PT_WINDOW_ACK_SIZE) {
682 av_log(ctx, AV_LOG_DEBUG, "Window acknowledgement size = %d\n", AV_RB32(p->data));
683 } else if (p->type == RTMP_PT_SET_PEER_BW) {
684 av_log(ctx, AV_LOG_DEBUG, "Set Peer BW = %d\n", AV_RB32(p->data));
685 } else if (p->type != RTMP_PT_AUDIO && p->type != RTMP_PT_VIDEO && p->type != RTMP_PT_METADATA) {
686 int i;
687 for (i = 0; i < p->size; i++)
688 av_log(ctx, AV_LOG_DEBUG, " %02X", p->data[i]);
689 av_log(ctx, AV_LOG_DEBUG, "\n");
690 }
691 }
692 #endif
693
694 int ff_amf_match_string(const uint8_t *data, int size, const char *str)
695 {
696 int len = strlen(str);
697 int amf_len, type;
698
699 if (size < 1)
700 return 0;
701
702 type = *data++;
703
704 if (type != AMF_DATA_TYPE_LONG_STRING &&
705 type != AMF_DATA_TYPE_STRING)
706 return 0;
707
708 if (type == AMF_DATA_TYPE_LONG_STRING) {
709 if ((size -= 4 + 1) < 0)
710 return 0;
711 amf_len = bytestream_get_be32(&data);
712 } else {
713 if ((size -= 2 + 1) < 0)
714 return 0;
715 amf_len = bytestream_get_be16(&data);
716 }
717
718 if (amf_len > size)
719 return 0;
720
721 if (amf_len != len)
722 return 0;
723
724 return !memcmp(data, str, len);
725 }
726