FFmpeg coverage

Directory: ../../../ffmpeg/
File: src/libavformat/rtmppkt.c
Date: 2025-05-15 14:57:22
Exec Total Coverage
Lines: 0 375 0.0%
Functions: 0 25 0.0%
Branches: 0 204 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
444 ✗ if (bytestream2_get_bytes_left(gb) < 1)
445 ✗ return -1;
446
447 ✗ type = bytestream2_get_byte(gb);
448 ✗ switch (type) {
449 ✗ case AMF_DATA_TYPE_NUMBER:
450 ✗ bytestream2_get_be64(gb);
451 ✗ return 0;
452 ✗ case AMF_DATA_TYPE_BOOL:
453 ✗ bytestream2_get_byte(gb);
454 ✗ return 0;
455 ✗ case AMF_DATA_TYPE_STRING:
456 ✗ bytestream2_skip(gb, bytestream2_get_be16(gb));
457 ✗ return 0;
458 ✗ case AMF_DATA_TYPE_LONG_STRING:
459 ✗ bytestream2_skip(gb, bytestream2_get_be32(gb));
460 ✗ return 0;
461 ✗ case AMF_DATA_TYPE_NULL:
462 ✗ return 0;
463 ✗ case AMF_DATA_TYPE_DATE:
464 ✗ bytestream2_skip(gb, 10);
465 ✗ return 0;
466 ✗ case AMF_DATA_TYPE_ARRAY:
467 case AMF_DATA_TYPE_MIXEDARRAY:
468 ✗ nb = bytestream2_get_be32(gb);
469 ✗ case AMF_DATA_TYPE_OBJECT:
470 ✗ while (type != AMF_DATA_TYPE_ARRAY || nb-- > 0) {
471 int t;
472 ✗ if (type != AMF_DATA_TYPE_ARRAY) {
473 ✗ int size = bytestream2_get_be16(gb);
474 ✗ if (!size) {
475 ✗ bytestream2_get_byte(gb);
476 ✗ break;
477 }
478 ✗ if (size < 0 || size >= bytestream2_get_bytes_left(gb))
479 ✗ return -1;
480 ✗ bytestream2_skip(gb, size);
481 }
482 ✗ t = amf_tag_skip(gb);
483 ✗ if (t < 0 || bytestream2_get_bytes_left(gb) <= 0)
484 ✗ return -1;
485 }
486 ✗ return 0;
487 ✗ case AMF_DATA_TYPE_OBJECT_END: return 0;
488 ✗ default: return -1;
489 }
490 }
491
492 ✗ int ff_amf_tag_size(const uint8_t *data, const uint8_t *data_end)
493 {
494 GetByteContext gb;
495 int ret;
496
497 ✗ if (data >= data_end)
498 ✗ return -1;
499
500 ✗ bytestream2_init(&gb, data, data_end - data);
501
502 ✗ ret = amf_tag_skip(&gb);
503 ✗ if (ret < 0 || bytestream2_get_bytes_left(&gb) <= 0)
504 ✗ return -1;
505 ✗ av_assert0(bytestream2_tell(&gb) >= 0 && bytestream2_tell(&gb) <= data_end - data);
506 ✗ return bytestream2_tell(&gb);
507 }
508
509 ✗ static int amf_get_field_value2(GetByteContext *gb,
510 const uint8_t *name, uint8_t *dst, int dst_size)
511 {
512 ✗ int namelen = strlen(name);
513 int len;
514
515 ✗ while (bytestream2_peek_byte(gb) != AMF_DATA_TYPE_OBJECT && bytestream2_get_bytes_left(gb) > 0) {
516 ✗ int ret = amf_tag_skip(gb);
517 ✗ if (ret < 0)
518 ✗ return -1;
519 }
520 ✗ if (bytestream2_get_bytes_left(gb) < 3)
521 ✗ return -1;
522 ✗ bytestream2_get_byte(gb);
523
524 ✗ for (;;) {
525 ✗ int size = bytestream2_get_be16(gb);
526 ✗ if (!size)
527 ✗ break;
528 ✗ if (size < 0 || size >= bytestream2_get_bytes_left(gb))
529 ✗ return -1;
530 ✗ bytestream2_skip(gb, size);
531 ✗ if (size == namelen && !memcmp(gb->buffer-size, name, namelen)) {
532 ✗ switch (bytestream2_get_byte(gb)) {
533 ✗ case AMF_DATA_TYPE_NUMBER:
534 ✗ snprintf(dst, dst_size, "%g", av_int2double(bytestream2_get_be64(gb)));
535 ✗ break;
536 ✗ case AMF_DATA_TYPE_BOOL:
537 ✗ snprintf(dst, dst_size, "%s", bytestream2_get_byte(gb) ? "true" : "false");
538 ✗ break;
539 ✗ case AMF_DATA_TYPE_STRING:
540 ✗ len = bytestream2_get_be16(gb);
541 ✗ if (dst_size < 1)
542 ✗ return -1;
543 ✗ if (dst_size < len + 1)
544 ✗ len = dst_size - 1;
545 ✗ bytestream2_get_buffer(gb, dst, len);
546 ✗ dst[len] = 0;
547 ✗ break;
548 ✗ default:
549 ✗ return -1;
550 }
551 ✗ return 0;
552 }
553 ✗ len = amf_tag_skip(gb);
554 ✗ if (len < 0 || bytestream2_get_bytes_left(gb) <= 0)
555 ✗ return -1;
556 }
557 ✗ return -1;
558 }
559
560 ✗ int ff_amf_get_field_value(const uint8_t *data, const uint8_t *data_end,
561 const uint8_t *name, uint8_t *dst, int dst_size)
562 {
563 GetByteContext gb;
564
565 ✗ if (data >= data_end)
566 ✗ return -1;
567
568 ✗ bytestream2_init(&gb, data, data_end - data);
569
570 ✗ return amf_get_field_value2(&gb, name, dst, dst_size);
571 }
572
573 #ifdef DEBUG
574 static const char* rtmp_packet_type(int type)
575 {
576 switch (type) {
577 case RTMP_PT_CHUNK_SIZE: return "chunk size";
578 case RTMP_PT_BYTES_READ: return "bytes read";
579 case RTMP_PT_USER_CONTROL: return "user control";
580 case RTMP_PT_WINDOW_ACK_SIZE: return "window acknowledgement size";
581 case RTMP_PT_SET_PEER_BW: return "set peer bandwidth";
582 case RTMP_PT_AUDIO: return "audio packet";
583 case RTMP_PT_VIDEO: return "video packet";
584 case RTMP_PT_FLEX_STREAM: return "Flex shared stream";
585 case RTMP_PT_FLEX_OBJECT: return "Flex shared object";
586 case RTMP_PT_FLEX_MESSAGE: return "Flex shared message";
587 case RTMP_PT_NOTIFY: return "notification";
588 case RTMP_PT_SHARED_OBJ: return "shared object";
589 case RTMP_PT_INVOKE: return "invoke";
590 case RTMP_PT_METADATA: return "metadata";
591 default: return "unknown";
592 }
593 }
594
595 static void amf_tag_contents(void *ctx, const uint8_t *data,
596 const uint8_t *data_end)
597 {
598 unsigned int size, nb = -1;
599 char buf[1024];
600 AMFDataType type;
601 int parse_key = 1;
602
603 if (data >= data_end)
604 return;
605 switch ((type = *data++)) {
606 case AMF_DATA_TYPE_NUMBER:
607 av_log(ctx, AV_LOG_DEBUG, " number %g\n", av_int2double(AV_RB64(data)));
608 return;
609 case AMF_DATA_TYPE_BOOL:
610 av_log(ctx, AV_LOG_DEBUG, " bool %d\n", *data);
611 return;
612 case AMF_DATA_TYPE_STRING:
613 case AMF_DATA_TYPE_LONG_STRING:
614 if (type == AMF_DATA_TYPE_STRING) {
615 size = bytestream_get_be16(&data);
616 } else {
617 size = bytestream_get_be32(&data);
618 }
619 size = FFMIN(size, sizeof(buf) - 1);
620 memcpy(buf, data, size);
621 buf[size] = 0;
622 av_log(ctx, AV_LOG_DEBUG, " string '%s'\n", buf);
623 return;
624 case AMF_DATA_TYPE_NULL:
625 av_log(ctx, AV_LOG_DEBUG, " NULL\n");
626 return;
627 case AMF_DATA_TYPE_ARRAY:
628 parse_key = 0;
629 case AMF_DATA_TYPE_MIXEDARRAY:
630 nb = bytestream_get_be32(&data);
631 case AMF_DATA_TYPE_OBJECT:
632 av_log(ctx, AV_LOG_DEBUG, " {\n");
633 while (nb-- > 0 || type != AMF_DATA_TYPE_ARRAY) {
634 int t;
635 if (parse_key) {
636 size = bytestream_get_be16(&data);
637 size = FFMIN(size, sizeof(buf) - 1);
638 if (!size) {
639 av_log(ctx, AV_LOG_DEBUG, " }\n");
640 data++;
641 break;
642 }
643 memcpy(buf, data, size);
644 buf[size] = 0;
645 if (size >= data_end - data)
646 return;
647 data += size;
648 av_log(ctx, AV_LOG_DEBUG, " %s: ", buf);
649 }
650 amf_tag_contents(ctx, data, data_end);
651 t = ff_amf_tag_size(data, data_end);
652 if (t < 0 || t >= data_end - data)
653 return;
654 data += t;
655 }
656 return;
657 case AMF_DATA_TYPE_OBJECT_END:
658 av_log(ctx, AV_LOG_DEBUG, " }\n");
659 return;
660 default:
661 return;
662 }
663 }
664
665 void ff_rtmp_packet_dump(void *ctx, RTMPPacket *p)
666 {
667 av_log(ctx, AV_LOG_DEBUG, "RTMP packet type '%s'(%d) for channel %d, timestamp %d, extra field %d size %d\n",
668 rtmp_packet_type(p->type), p->type, p->channel_id, p->timestamp, p->extra, p->size);
669 if (p->type == RTMP_PT_INVOKE || p->type == RTMP_PT_NOTIFY) {
670 uint8_t *src = p->data, *src_end = p->data + p->size;
671 while (src < src_end) {
672 int sz;
673 amf_tag_contents(ctx, src, src_end);
674 sz = ff_amf_tag_size(src, src_end);
675 if (sz < 0)
676 break;
677 src += sz;
678 }
679 } else if (p->type == RTMP_PT_WINDOW_ACK_SIZE) {
680 av_log(ctx, AV_LOG_DEBUG, "Window acknowledgement size = %d\n", AV_RB32(p->data));
681 } else if (p->type == RTMP_PT_SET_PEER_BW) {
682 av_log(ctx, AV_LOG_DEBUG, "Set Peer BW = %d\n", AV_RB32(p->data));
683 } else if (p->type != RTMP_PT_AUDIO && p->type != RTMP_PT_VIDEO && p->type != RTMP_PT_METADATA) {
684 int i;
685 for (i = 0; i < p->size; i++)
686 av_log(ctx, AV_LOG_DEBUG, " %02X", p->data[i]);
687 av_log(ctx, AV_LOG_DEBUG, "\n");
688 }
689 }
690 #endif
691
692 ✗ int ff_amf_match_string(const uint8_t *data, int size, const char *str)
693 {
694 ✗ int len = strlen(str);
695 int amf_len, type;
696
697 ✗ if (size < 1)
698 ✗ return 0;
699
700 ✗ type = *data++;
701
702 ✗ if (type != AMF_DATA_TYPE_LONG_STRING &&
703 type != AMF_DATA_TYPE_STRING)
704 ✗ return 0;
705
706 ✗ if (type == AMF_DATA_TYPE_LONG_STRING) {
707 ✗ if ((size -= 4 + 1) < 0)
708 ✗ return 0;
709 ✗ amf_len = bytestream_get_be32(&data);
710 } else {
711 ✗ if ((size -= 2 + 1) < 0)
712 ✗ return 0;
713 ✗ amf_len = bytestream_get_be16(&data);
714 }
715
716 ✗ if (amf_len > size)
717 ✗ return 0;
718
719 ✗ if (amf_len != len)
720 ✗ return 0;
721
722 ✗ return !memcmp(data, str, len);
723 }
724