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
ff_amf_write_bool(uint8_t ** dst,int val)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
ff_amf_write_number(uint8_t ** dst,double val)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
ff_amf_write_string(uint8_t ** dst,const char * str)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
ff_amf_write_string2(uint8_t ** dst,const char * str1,const char * str2)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
ff_amf_write_null(uint8_t ** dst)63 void ff_amf_write_null(uint8_t **dst)
64 {
65 bytestream_put_byte(dst, AMF_DATA_TYPE_NULL);
66 }
67
ff_amf_write_object_start(uint8_t ** dst)68 void ff_amf_write_object_start(uint8_t **dst)
69 {
70 bytestream_put_byte(dst, AMF_DATA_TYPE_OBJECT);
71 }
72
ff_amf_write_field_name(uint8_t ** dst,const char * str)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
ff_amf_write_object_end(uint8_t ** dst)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
ff_amf_read_bool(GetByteContext * bc,int * val)87 int ff_amf_read_bool(GetByteContext *bc, int *val)
88 {
89 if (bytestream2_get_byte(bc) != AMF_DATA_TYPE_BOOL)
90 return AVERROR_INVALIDDATA;
91 *val = bytestream2_get_byte(bc);
92 return 0;
93 }
94
ff_amf_read_number(GetByteContext * bc,double * val)95 int ff_amf_read_number(GetByteContext *bc, double *val)
96 {
97 uint64_t read;
98 if (bytestream2_get_byte(bc) != AMF_DATA_TYPE_NUMBER)
99 return AVERROR_INVALIDDATA;
100 read = bytestream2_get_be64(bc);
101 *val = av_int2double(read);
102 return 0;
103 }
104
ff_amf_get_string(GetByteContext * bc,uint8_t * str,int strsize,int * length)105 int ff_amf_get_string(GetByteContext *bc, uint8_t *str,
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) {
115 av_log(NULL, AV_LOG_WARNING,
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
ff_amf_read_string(GetByteContext * bc,uint8_t * str,int strsize,int * length)123 int ff_amf_read_string(GetByteContext *bc, uint8_t *str,
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
ff_amf_read_null(GetByteContext * bc)131 int ff_amf_read_null(GetByteContext *bc)
132 {
133 if (bytestream2_get_byte(bc) != AMF_DATA_TYPE_NULL)
134 return AVERROR_INVALIDDATA;
135 return 0;
136 }
137
ff_rtmp_check_alloc_array(RTMPPacket ** prev_pkt,int * nb_prev_pkt,int channel)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
ff_rtmp_packet_read(URLContext * h,RTMPPacket * p,int chunk_size,RTMPPacket ** prev_pkt,int * nb_prev_pkt)159 int ff_rtmp_packet_read(URLContext *h, RTMPPacket *p,
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
rtmp_packet_read_one_chunk(URLContext * h,RTMPPacket * p,int chunk_size,RTMPPacket ** prev_pkt_ptr,int * nb_prev_pkt,uint8_t hdr)171 static int rtmp_packet_read_one_chunk(URLContext *h, RTMPPacket *p,
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) {
278 ff_rtmp_packet_destroy(p);
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
ff_rtmp_packet_read_internal(URLContext * h,RTMPPacket * p,int chunk_size,RTMPPacket ** prev_pkt,int * nb_prev_pkt,uint8_t hdr)298 int ff_rtmp_packet_read_internal(URLContext *h, RTMPPacket *p, int chunk_size,
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
ff_rtmp_packet_write(URLContext * h,RTMPPacket * pkt,int chunk_size,RTMPPacket ** prev_pkt_ptr,int * nb_prev_pkt)313 int ff_rtmp_packet_write(URLContext *h, RTMPPacket *pkt,
314 int chunk_size, RTMPPacket **prev_pkt_ptr,
315 int *nb_prev_pkt)
316 {
317 uint8_t pkt_hdr[16], *p = pkt_hdr;
318 int mode = RTMP_PS_TWELVEBYTES;
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
ff_rtmp_packet_create(RTMPPacket * pkt,int channel_id,RTMPPacketType type,int timestamp,int size)410 int ff_rtmp_packet_create(RTMPPacket *pkt, int channel_id, RTMPPacketType type,
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
ff_rtmp_packet_destroy(RTMPPacket * pkt)428 void ff_rtmp_packet_destroy(RTMPPacket *pkt)
429 {
430 if (!pkt)
431 return;
432 av_freep(&pkt->data);
433 pkt->size = 0;
434 }
435
amf_tag_skip(GetByteContext * gb)436 static int amf_tag_skip(GetByteContext *gb)
437 {
438 AMFDataType type;
439 unsigned nb = -1;
440 int parse_key = 1;
441
442 if (bytestream2_get_bytes_left(gb) < 1)
443 return -1;
444
445 type = bytestream2_get_byte(gb);
446 switch (type) {
447 case AMF_DATA_TYPE_NUMBER:
448 bytestream2_get_be64(gb);
449 return 0;
450 case AMF_DATA_TYPE_BOOL:
451 bytestream2_get_byte(gb);
452 return 0;
453 case AMF_DATA_TYPE_STRING:
454 bytestream2_skip(gb, bytestream2_get_be16(gb));
455 return 0;
456 case AMF_DATA_TYPE_LONG_STRING:
457 bytestream2_skip(gb, bytestream2_get_be32(gb));
458 return 0;
459 case AMF_DATA_TYPE_NULL:
460 return 0;
461 case AMF_DATA_TYPE_DATE:
462 bytestream2_skip(gb, 10);
463 return 0;
464 case AMF_DATA_TYPE_ARRAY:
465 parse_key = 0;
466 case AMF_DATA_TYPE_MIXEDARRAY:
467 nb = bytestream2_get_be32(gb);
468 case AMF_DATA_TYPE_OBJECT:
469 while (nb-- > 0 || type != AMF_DATA_TYPE_ARRAY) {
470 int t;
471 if (parse_key) {
472 int size = bytestream2_get_be16(gb);
473 if (!size) {
474 bytestream2_get_byte(gb);
475 break;
476 }
477 if (size < 0 || size >= bytestream2_get_bytes_left(gb))
478 return -1;
479 bytestream2_skip(gb, size);
480 }
481 t = amf_tag_skip(gb);
482 if (t < 0 || bytestream2_get_bytes_left(gb) <= 0)
483 return -1;
484 }
485 return 0;
486 case AMF_DATA_TYPE_OBJECT_END: return 0;
487 default: return -1;
488 }
489 }
490
ff_amf_tag_size(const uint8_t * data,const uint8_t * data_end)491 int ff_amf_tag_size(const uint8_t *data, const uint8_t *data_end)
492 {
493 GetByteContext gb;
494 int ret;
495
496 if (data >= data_end)
497 return -1;
498
499 bytestream2_init(&gb, data, data_end - data);
500
501 ret = amf_tag_skip(&gb);
502 if (ret < 0 || bytestream2_get_bytes_left(&gb) <= 0)
503 return -1;
504 av_assert0(bytestream2_tell(&gb) >= 0 && bytestream2_tell(&gb) <= data_end - data);
505 return bytestream2_tell(&gb);
506 }
507
amf_get_field_value2(GetByteContext * gb,const uint8_t * name,uint8_t * dst,int dst_size)508 static int amf_get_field_value2(GetByteContext *gb,
509 const uint8_t *name, uint8_t *dst, int dst_size)
510 {
511 int namelen = strlen(name);
512 int len;
513
514 while (bytestream2_peek_byte(gb) != AMF_DATA_TYPE_OBJECT && bytestream2_get_bytes_left(gb) > 0) {
515 int ret = amf_tag_skip(gb);
516 if (ret < 0)
517 return -1;
518 }
519 if (bytestream2_get_bytes_left(gb) < 3)
520 return -1;
521 bytestream2_get_byte(gb);
522
523 for (;;) {
524 int size = bytestream2_get_be16(gb);
525 if (!size)
526 break;
527 if (size < 0 || size >= bytestream2_get_bytes_left(gb))
528 return -1;
529 bytestream2_skip(gb, size);
530 if (size == namelen && !memcmp(gb->buffer-size, name, namelen)) {
531 switch (bytestream2_get_byte(gb)) {
532 case AMF_DATA_TYPE_NUMBER:
533 snprintf(dst, dst_size, "%g", av_int2double(bytestream2_get_be64(gb)));
534 break;
535 case AMF_DATA_TYPE_BOOL:
536 snprintf(dst, dst_size, "%s", bytestream2_get_byte(gb) ? "true" : "false");
537 break;
538 case AMF_DATA_TYPE_STRING:
539 len = bytestream2_get_be16(gb);
540 if (dst_size < 1)
541 return -1;
542 if (dst_size < len + 1)
543 len = dst_size - 1;
544 bytestream2_get_buffer(gb, dst, len);
545 dst[len] = 0;
546 break;
547 default:
548 return -1;
549 }
550 return 0;
551 }
552 len = amf_tag_skip(gb);
553 if (len < 0 || bytestream2_get_bytes_left(gb) <= 0)
554 return -1;
555 }
556 return -1;
557 }
558
ff_amf_get_field_value(const uint8_t * data,const uint8_t * data_end,const uint8_t * name,uint8_t * dst,int dst_size)559 int ff_amf_get_field_value(const uint8_t *data, const uint8_t *data_end,
560 const uint8_t *name, uint8_t *dst, int dst_size)
561 {
562 GetByteContext gb;
563
564 if (data >= data_end)
565 return -1;
566
567 bytestream2_init(&gb, data, data_end - data);
568
569 return amf_get_field_value2(&gb, name, dst, dst_size);
570 }
571
rtmp_packet_type(int type)572 static const char* rtmp_packet_type(int type)
573 {
574 switch (type) {
575 case RTMP_PT_CHUNK_SIZE: return "chunk size";
576 case RTMP_PT_BYTES_READ: return "bytes read";
577 case RTMP_PT_USER_CONTROL: return "user control";
578 case RTMP_PT_WINDOW_ACK_SIZE: return "window acknowledgement size";
579 case RTMP_PT_SET_PEER_BW: return "set peer bandwidth";
580 case RTMP_PT_AUDIO: return "audio packet";
581 case RTMP_PT_VIDEO: return "video packet";
582 case RTMP_PT_FLEX_STREAM: return "Flex shared stream";
583 case RTMP_PT_FLEX_OBJECT: return "Flex shared object";
584 case RTMP_PT_FLEX_MESSAGE: return "Flex shared message";
585 case RTMP_PT_NOTIFY: return "notification";
586 case RTMP_PT_SHARED_OBJ: return "shared object";
587 case RTMP_PT_INVOKE: return "invoke";
588 case RTMP_PT_METADATA: return "metadata";
589 default: return "unknown";
590 }
591 }
592
amf_tag_contents(void * ctx,const uint8_t * data,const uint8_t * data_end)593 static void amf_tag_contents(void *ctx, const uint8_t *data,
594 const uint8_t *data_end)
595 {
596 unsigned int size, nb = -1;
597 char buf[1024];
598 AMFDataType type;
599 int parse_key = 1;
600
601 if (data >= data_end)
602 return;
603 switch ((type = *data++)) {
604 case AMF_DATA_TYPE_NUMBER:
605 av_log(ctx, AV_LOG_DEBUG, " number %g\n", av_int2double(AV_RB64(data)));
606 return;
607 case AMF_DATA_TYPE_BOOL:
608 av_log(ctx, AV_LOG_DEBUG, " bool %d\n", *data);
609 return;
610 case AMF_DATA_TYPE_STRING:
611 case AMF_DATA_TYPE_LONG_STRING:
612 if (type == AMF_DATA_TYPE_STRING) {
613 size = bytestream_get_be16(&data);
614 } else {
615 size = bytestream_get_be32(&data);
616 }
617 size = FFMIN(size, sizeof(buf) - 1);
618 memcpy(buf, data, size);
619 buf[size] = 0;
620 av_log(ctx, AV_LOG_DEBUG, " string '%s'\n", buf);
621 return;
622 case AMF_DATA_TYPE_NULL:
623 av_log(ctx, AV_LOG_DEBUG, " NULL\n");
624 return;
625 case AMF_DATA_TYPE_ARRAY:
626 parse_key = 0;
627 case AMF_DATA_TYPE_MIXEDARRAY:
628 nb = bytestream_get_be32(&data);
629 case AMF_DATA_TYPE_OBJECT:
630 av_log(ctx, AV_LOG_DEBUG, " {\n");
631 while (nb-- > 0 || type != AMF_DATA_TYPE_ARRAY) {
632 int t;
633 if (parse_key) {
634 size = bytestream_get_be16(&data);
635 size = FFMIN(size, sizeof(buf) - 1);
636 if (!size) {
637 av_log(ctx, AV_LOG_DEBUG, " }\n");
638 data++;
639 break;
640 }
641 memcpy(buf, data, size);
642 buf[size] = 0;
643 if (size >= data_end - data)
644 return;
645 data += size;
646 av_log(ctx, AV_LOG_DEBUG, " %s: ", buf);
647 }
648 amf_tag_contents(ctx, data, data_end);
649 t = ff_amf_tag_size(data, data_end);
650 if (t < 0 || t >= data_end - data)
651 return;
652 data += t;
653 }
654 return;
655 case AMF_DATA_TYPE_OBJECT_END:
656 av_log(ctx, AV_LOG_DEBUG, " }\n");
657 return;
658 default:
659 return;
660 }
661 }
662
ff_rtmp_packet_dump(void * ctx,RTMPPacket * p)663 void ff_rtmp_packet_dump(void *ctx, RTMPPacket *p)
664 {
665 av_log(ctx, AV_LOG_DEBUG, "RTMP packet type '%s'(%d) for channel %d, timestamp %d, extra field %d size %d\n",
666 rtmp_packet_type(p->type), p->type, p->channel_id, p->timestamp, p->extra, p->size);
667 if (p->type == RTMP_PT_INVOKE || p->type == RTMP_PT_NOTIFY) {
668 uint8_t *src = p->data, *src_end = p->data + p->size;
669 while (src < src_end) {
670 int sz;
671 amf_tag_contents(ctx, src, src_end);
672 sz = ff_amf_tag_size(src, src_end);
673 if (sz < 0)
674 break;
675 src += sz;
676 }
677 } else if (p->type == RTMP_PT_WINDOW_ACK_SIZE) {
678 av_log(ctx, AV_LOG_DEBUG, "Window acknowledgement size = %d\n", AV_RB32(p->data));
679 } else if (p->type == RTMP_PT_SET_PEER_BW) {
680 av_log(ctx, AV_LOG_DEBUG, "Set Peer BW = %d\n", AV_RB32(p->data));
681 } else if (p->type != RTMP_PT_AUDIO && p->type != RTMP_PT_VIDEO && p->type != RTMP_PT_METADATA) {
682 int i;
683 for (i = 0; i < p->size; i++)
684 av_log(ctx, AV_LOG_DEBUG, " %02X", p->data[i]);
685 av_log(ctx, AV_LOG_DEBUG, "\n");
686 }
687 }
688
ff_amf_match_string(const uint8_t * data,int size,const char * str)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