FFmpeg coverage


Directory: ../../../ffmpeg/
File: src/libavformat/rtmppkt.c
Date: 2022-12-05 20:26:17
Exec Total Coverage
Lines: 0 366 0.0%
Functions: 0 24 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/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
63 void ff_amf_write_null(uint8_t **dst)
64 {
65 bytestream_put_byte(dst, AMF_DATA_TYPE_NULL);
66 }
67
68 void ff_amf_write_object_start(uint8_t **dst)
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
79 void ff_amf_write_object_end(uint8_t **dst)
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_number(GetByteContext *bc, double *val)
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
97 int ff_amf_get_string(GetByteContext *bc, uint8_t *str,
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) {
107 av_log(NULL, AV_LOG_WARNING,
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
115 int ff_amf_read_string(GetByteContext *bc, uint8_t *str,
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
123 int ff_amf_read_null(GetByteContext *bc)
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
151 int ff_rtmp_packet_read(URLContext *h, RTMPPacket *p,
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
163 static int rtmp_packet_read_one_chunk(URLContext *h, RTMPPacket *p,
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) {
270 ff_rtmp_packet_destroy(p);
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
290 int ff_rtmp_packet_read_internal(URLContext *h, RTMPPacket *p, int chunk_size,
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
305 int ff_rtmp_packet_write(URLContext *h, RTMPPacket *pkt,
306 int chunk_size, RTMPPacket **prev_pkt_ptr,
307 int *nb_prev_pkt)
308 {
309 uint8_t pkt_hdr[16], *p = pkt_hdr;
310 int mode = RTMP_PS_TWELVEBYTES;
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) {
341 mode = RTMP_PS_FOURBYTES;
342 if (pkt->ts_field == prev_pkt[pkt->channel_id].ts_field)
343 mode = RTMP_PS_ONEBYTE;
344 } else {
345 mode = RTMP_PS_EIGHTBYTES;
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 // FIXME:
378 // Writing packets is currently not optimized to minimize system calls.
379 // Since system calls flush on exit which we cannot change in a system-independant way.
380 // We should fix this behavior and by writing packets in a single or in as few as possible system calls.
381 // Protocols like TCP and RTMP should benefit from this when enabling TCP_NODELAY.
382
383 if ((ret = ffurl_write(h, pkt_hdr, p - pkt_hdr)) < 0)
384 return ret;
385 written = p - pkt_hdr + pkt->size;
386 while (off < pkt->size) {
387 int towrite = FFMIN(chunk_size, pkt->size - off);
388 if ((ret = ffurl_write(h, pkt->data + off, towrite)) < 0)
389 return ret;
390 off += towrite;
391 if (off < pkt->size) {
392 uint8_t marker = 0xC0 | pkt->channel_id;
393 if ((ret = ffurl_write(h, &marker, 1)) < 0)
394 return ret;
395 written++;
396 if (pkt->ts_field == 0xFFFFFF) {
397 uint8_t ts_header[4];
398 AV_WB32(ts_header, timestamp);
399 if ((ret = ffurl_write(h, ts_header, 4)) < 0)
400 return ret;
401 written += 4;
402 }
403 }
404 }
405 return written;
406 }
407
408 int ff_rtmp_packet_create(RTMPPacket *pkt, int channel_id, RTMPPacketType type,
409 int timestamp, int size)
410 {
411 if (size) {
412 pkt->data = av_realloc(NULL, size);
413 if (!pkt->data)
414 return AVERROR(ENOMEM);
415 }
416 pkt->size = size;
417 pkt->channel_id = channel_id;
418 pkt->type = type;
419 pkt->timestamp = timestamp;
420 pkt->extra = 0;
421 pkt->ts_field = 0;
422
423 return 0;
424 }
425
426 void ff_rtmp_packet_destroy(RTMPPacket *pkt)
427 {
428 if (!pkt)
429 return;
430 av_freep(&pkt->data);
431 pkt->size = 0;
432 }
433
434 static int amf_tag_skip(GetByteContext *gb)
435 {
436 AMFDataType type;
437 unsigned nb = -1;
438 int parse_key = 1;
439
440 if (bytestream2_get_bytes_left(gb) < 1)
441 return -1;
442
443 type = bytestream2_get_byte(gb);
444 switch (type) {
445 case AMF_DATA_TYPE_NUMBER:
446 bytestream2_get_be64(gb);
447 return 0;
448 case AMF_DATA_TYPE_BOOL:
449 bytestream2_get_byte(gb);
450 return 0;
451 case AMF_DATA_TYPE_STRING:
452 bytestream2_skip(gb, bytestream2_get_be16(gb));
453 return 0;
454 case AMF_DATA_TYPE_LONG_STRING:
455 bytestream2_skip(gb, bytestream2_get_be32(gb));
456 return 0;
457 case AMF_DATA_TYPE_NULL:
458 return 0;
459 case AMF_DATA_TYPE_DATE:
460 bytestream2_skip(gb, 10);
461 return 0;
462 case AMF_DATA_TYPE_ARRAY:
463 parse_key = 0;
464 case AMF_DATA_TYPE_MIXEDARRAY:
465 nb = bytestream2_get_be32(gb);
466 case AMF_DATA_TYPE_OBJECT:
467 while (nb-- > 0 || type != AMF_DATA_TYPE_ARRAY) {
468 int t;
469 if (parse_key) {
470 int size = bytestream2_get_be16(gb);
471 if (!size) {
472 bytestream2_get_byte(gb);
473 break;
474 }
475 if (size < 0 || size >= bytestream2_get_bytes_left(gb))
476 return -1;
477 bytestream2_skip(gb, size);
478 }
479 t = amf_tag_skip(gb);
480 if (t < 0 || bytestream2_get_bytes_left(gb) <= 0)
481 return -1;
482 }
483 return 0;
484 case AMF_DATA_TYPE_OBJECT_END: return 0;
485 default: return -1;
486 }
487 }
488
489 int ff_amf_tag_size(const uint8_t *data, const uint8_t *data_end)
490 {
491 GetByteContext gb;
492 int ret;
493
494 if (data >= data_end)
495 return -1;
496
497 bytestream2_init(&gb, data, data_end - data);
498
499 ret = amf_tag_skip(&gb);
500 if (ret < 0 || bytestream2_get_bytes_left(&gb) <= 0)
501 return -1;
502 av_assert0(bytestream2_tell(&gb) >= 0 && bytestream2_tell(&gb) <= data_end - data);
503 return bytestream2_tell(&gb);
504 }
505
506 static int amf_get_field_value2(GetByteContext *gb,
507 const uint8_t *name, uint8_t *dst, int dst_size)
508 {
509 int namelen = strlen(name);
510 int len;
511
512 while (bytestream2_peek_byte(gb) != AMF_DATA_TYPE_OBJECT && bytestream2_get_bytes_left(gb) > 0) {
513 int ret = amf_tag_skip(gb);
514 if (ret < 0)
515 return -1;
516 }
517 if (bytestream2_get_bytes_left(gb) < 3)
518 return -1;
519 bytestream2_get_byte(gb);
520
521 for (;;) {
522 int size = bytestream2_get_be16(gb);
523 if (!size)
524 break;
525 if (size < 0 || size >= bytestream2_get_bytes_left(gb))
526 return -1;
527 bytestream2_skip(gb, size);
528 if (size == namelen && !memcmp(gb->buffer-size, name, namelen)) {
529 switch (bytestream2_get_byte(gb)) {
530 case AMF_DATA_TYPE_NUMBER:
531 snprintf(dst, dst_size, "%g", av_int2double(bytestream2_get_be64(gb)));
532 break;
533 case AMF_DATA_TYPE_BOOL:
534 snprintf(dst, dst_size, "%s", bytestream2_get_byte(gb) ? "true" : "false");
535 break;
536 case AMF_DATA_TYPE_STRING:
537 len = bytestream2_get_be16(gb);
538 if (dst_size < 1)
539 return -1;
540 if (dst_size < len + 1)
541 len = dst_size - 1;
542 bytestream2_get_buffer(gb, dst, len);
543 dst[len] = 0;
544 break;
545 default:
546 return -1;
547 }
548 return 0;
549 }
550 len = amf_tag_skip(gb);
551 if (len < 0 || bytestream2_get_bytes_left(gb) <= 0)
552 return -1;
553 }
554 return -1;
555 }
556
557 int ff_amf_get_field_value(const uint8_t *data, const uint8_t *data_end,
558 const uint8_t *name, uint8_t *dst, int dst_size)
559 {
560 GetByteContext gb;
561
562 if (data >= data_end)
563 return -1;
564
565 bytestream2_init(&gb, data, data_end - data);
566
567 return amf_get_field_value2(&gb, name, dst, dst_size);
568 }
569
570 #ifdef DEBUG
571 static const char* rtmp_packet_type(int type)
572 {
573 switch (type) {
574 case RTMP_PT_CHUNK_SIZE: return "chunk size";
575 case RTMP_PT_BYTES_READ: return "bytes read";
576 case RTMP_PT_USER_CONTROL: return "user control";
577 case RTMP_PT_WINDOW_ACK_SIZE: return "window acknowledgement size";
578 case RTMP_PT_SET_PEER_BW: return "set peer bandwidth";
579 case RTMP_PT_AUDIO: return "audio packet";
580 case RTMP_PT_VIDEO: return "video packet";
581 case RTMP_PT_FLEX_STREAM: return "Flex shared stream";
582 case RTMP_PT_FLEX_OBJECT: return "Flex shared object";
583 case RTMP_PT_FLEX_MESSAGE: return "Flex shared message";
584 case RTMP_PT_NOTIFY: return "notification";
585 case RTMP_PT_SHARED_OBJ: return "shared object";
586 case RTMP_PT_INVOKE: return "invoke";
587 case RTMP_PT_METADATA: return "metadata";
588 default: return "unknown";
589 }
590 }
591
592 static void amf_tag_contents(void *ctx, const uint8_t *data,
593 const uint8_t *data_end)
594 {
595 unsigned int size, nb = -1;
596 char buf[1024];
597 AMFDataType type;
598 int parse_key = 1;
599
600 if (data >= data_end)
601 return;
602 switch ((type = *data++)) {
603 case AMF_DATA_TYPE_NUMBER:
604 av_log(ctx, AV_LOG_DEBUG, " number %g\n", av_int2double(AV_RB64(data)));
605 return;
606 case AMF_DATA_TYPE_BOOL:
607 av_log(ctx, AV_LOG_DEBUG, " bool %d\n", *data);
608 return;
609 case AMF_DATA_TYPE_STRING:
610 case AMF_DATA_TYPE_LONG_STRING:
611 if (type == AMF_DATA_TYPE_STRING) {
612 size = bytestream_get_be16(&data);
613 } else {
614 size = bytestream_get_be32(&data);
615 }
616 size = FFMIN(size, sizeof(buf) - 1);
617 memcpy(buf, data, size);
618 buf[size] = 0;
619 av_log(ctx, AV_LOG_DEBUG, " string '%s'\n", buf);
620 return;
621 case AMF_DATA_TYPE_NULL:
622 av_log(ctx, AV_LOG_DEBUG, " NULL\n");
623 return;
624 case AMF_DATA_TYPE_ARRAY:
625 parse_key = 0;
626 case AMF_DATA_TYPE_MIXEDARRAY:
627 nb = bytestream_get_be32(&data);
628 case AMF_DATA_TYPE_OBJECT:
629 av_log(ctx, AV_LOG_DEBUG, " {\n");
630 while (nb-- > 0 || type != AMF_DATA_TYPE_ARRAY) {
631 int t;
632 if (parse_key) {
633 size = bytestream_get_be16(&data);
634 size = FFMIN(size, sizeof(buf) - 1);
635 if (!size) {
636 av_log(ctx, AV_LOG_DEBUG, " }\n");
637 data++;
638 break;
639 }
640 memcpy(buf, data, size);
641 buf[size] = 0;
642 if (size >= data_end - data)
643 return;
644 data += size;
645 av_log(ctx, AV_LOG_DEBUG, " %s: ", buf);
646 }
647 amf_tag_contents(ctx, data, data_end);
648 t = ff_amf_tag_size(data, data_end);
649 if (t < 0 || t >= data_end - data)
650 return;
651 data += t;
652 }
653 return;
654 case AMF_DATA_TYPE_OBJECT_END:
655 av_log(ctx, AV_LOG_DEBUG, " }\n");
656 return;
657 default:
658 return;
659 }
660 }
661
662 void ff_rtmp_packet_dump(void *ctx, RTMPPacket *p)
663 {
664 av_log(ctx, AV_LOG_DEBUG, "RTMP packet type '%s'(%d) for channel %d, timestamp %d, extra field %d size %d\n",
665 rtmp_packet_type(p->type), p->type, p->channel_id, p->timestamp, p->extra, p->size);
666 if (p->type == RTMP_PT_INVOKE || p->type == RTMP_PT_NOTIFY) {
667 uint8_t *src = p->data, *src_end = p->data + p->size;
668 while (src < src_end) {
669 int sz;
670 amf_tag_contents(ctx, src, src_end);
671 sz = ff_amf_tag_size(src, src_end);
672 if (sz < 0)
673 break;
674 src += sz;
675 }
676 } else if (p->type == RTMP_PT_WINDOW_ACK_SIZE) {
677 av_log(ctx, AV_LOG_DEBUG, "Window acknowledgement size = %d\n", AV_RB32(p->data));
678 } else if (p->type == RTMP_PT_SET_PEER_BW) {
679 av_log(ctx, AV_LOG_DEBUG, "Set Peer BW = %d\n", AV_RB32(p->data));
680 } else if (p->type != RTMP_PT_AUDIO && p->type != RTMP_PT_VIDEO && p->type != RTMP_PT_METADATA) {
681 int i;
682 for (i = 0; i < p->size; i++)
683 av_log(ctx, AV_LOG_DEBUG, " %02X", p->data[i]);
684 av_log(ctx, AV_LOG_DEBUG, "\n");
685 }
686 }
687 #endif
688
689 int ff_amf_match_string(const uint8_t *data, int size, const char *str)
690 {
691 int len = strlen(str);
692 int amf_len, type;
693
694 if (size < 1)
695 return 0;
696
697 type = *data++;
698
699 if (type != AMF_DATA_TYPE_LONG_STRING &&
700 type != AMF_DATA_TYPE_STRING)
701 return 0;
702
703 if (type == AMF_DATA_TYPE_LONG_STRING) {
704 if ((size -= 4 + 1) < 0)
705 return 0;
706 amf_len = bytestream_get_be32(&data);
707 } else {
708 if ((size -= 2 + 1) < 0)
709 return 0;
710 amf_len = bytestream_get_be16(&data);
711 }
712
713 if (amf_len > size)
714 return 0;
715
716 if (amf_len != len)
717 return 0;
718
719 return !memcmp(data, str, len);
720 }
721