FFmpeg coverage

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_array_start(uint8_t **dst, uint32_t length)
44			{
45		✗	bytestream_put_byte(dst, AMF_DATA_TYPE_ARRAY);
46		✗	bytestream_put_be32(dst, length);
47		✗	}
48
49		✗	void ff_amf_write_string(uint8_t **dst, const char *str)
50			{
51		✗	bytestream_put_byte(dst, AMF_DATA_TYPE_STRING);
52		✗	bytestream_put_be16(dst, strlen(str));
53		✗	bytestream_put_buffer(dst, str, strlen(str));
54		✗	}
55
56		✗	void ff_amf_write_string2(uint8_t **dst, const char *str1, const char *str2)
57			{
58		✗	int len1 = 0, len2 = 0;
59		✗	if (str1)
60		✗	len1 = strlen(str1);
61		✗	if (str2)
62		✗	len2 = strlen(str2);
63		✗	bytestream_put_byte(dst, AMF_DATA_TYPE_STRING);
64		✗	bytestream_put_be16(dst, len1 + len2);
65		✗	bytestream_put_buffer(dst, str1, len1);
66		✗	bytestream_put_buffer(dst, str2, len2);
67		✗	}
68
69		✗	void ff_amf_write_null(uint8_t **dst)
70			{
71		✗	bytestream_put_byte(dst, AMF_DATA_TYPE_NULL);
72		✗	}
73
74		✗	void ff_amf_write_object_start(uint8_t **dst)
75			{
76		✗	bytestream_put_byte(dst, AMF_DATA_TYPE_OBJECT);
77		✗	}
78
79		✗	void ff_amf_write_field_name(uint8_t **dst, const char *str)
80			{
81		✗	bytestream_put_be16(dst, strlen(str));
82		✗	bytestream_put_buffer(dst, str, strlen(str));
83		✗	}
84
85		✗	void ff_amf_write_object_end(uint8_t **dst)
86			{
87			/* first two bytes are field name length = 0,
88			* AMF object should end with it and end marker
89			*/
90		✗	bytestream_put_be24(dst, AMF_DATA_TYPE_OBJECT_END);
91		✗	}
92
93		✗	int ff_amf_read_number(GetByteContext *bc, double *val)
94			{
95			uint64_t read;
96		✗	if (bytestream2_get_byte(bc) != AMF_DATA_TYPE_NUMBER)
97		✗	return AVERROR_INVALIDDATA;
98		✗	read = bytestream2_get_be64(bc);
99		✗	*val = av_int2double(read);
100		✗	return 0;
101			}
102
103		✗	int ff_amf_get_string(GetByteContext *bc, uint8_t *str,
104			int strsize, int *length)
105			{
106		✗	int stringlen = 0;
107			int readsize;
108		✗	stringlen = bytestream2_get_be16(bc);
109		✗	if (stringlen + 1 > strsize)
110		✗	return AVERROR(EINVAL);
111		✗	readsize = bytestream2_get_buffer(bc, str, stringlen);
112		✗	if (readsize != stringlen) {
113		✗	av_log(NULL, AV_LOG_WARNING,
114			"Unable to read as many bytes as AMF string signaled\n");
115			}
116		✗	str[readsize] = '\0';
117		✗	*length = FFMIN(stringlen, readsize);
118		✗	return 0;
119			}
120
121		✗	int ff_amf_read_string(GetByteContext *bc, uint8_t *str,
122			int strsize, int *length)
123			{
124		✗	if (bytestream2_get_byte(bc) != AMF_DATA_TYPE_STRING)
125		✗	return AVERROR_INVALIDDATA;
126		✗	return ff_amf_get_string(bc, str, strsize, length);
127			}
128
129		✗	int ff_amf_read_null(GetByteContext *bc)
130			{
131		✗	if (bytestream2_get_byte(bc) != AMF_DATA_TYPE_NULL)
132		✗	return AVERROR_INVALIDDATA;
133		✗	return 0;
134			}
135
136		✗	int ff_rtmp_check_alloc_array(RTMPPacket **prev_pkt, int *nb_prev_pkt,
137			int channel)
138			{
139			int nb_alloc;
140			RTMPPacket *ptr;
141		✗	if (channel < *nb_prev_pkt)
142		✗	return 0;
143
144		✗	nb_alloc = channel + 16;
145			// This can't use the av_reallocp family of functions, since we
146			// would need to free each element in the array before the array
147			// itself is freed.
148		✗	ptr = av_realloc_array(*prev_pkt, nb_alloc, sizeof(**prev_pkt));
149		✗	if (!ptr)
150		✗	return AVERROR(ENOMEM);
151		✗	memset(ptr + *nb_prev_pkt, 0, (nb_alloc - *nb_prev_pkt) * sizeof(*ptr));
152		✗	*prev_pkt = ptr;
153		✗	*nb_prev_pkt = nb_alloc;
154		✗	return 0;
155			}
156
157		✗	int ff_rtmp_packet_read(URLContext *h, RTMPPacket *p,
158			int chunk_size, RTMPPacket **prev_pkt, int *nb_prev_pkt)
159			{
160			uint8_t hdr;
161
162		✗	if (ffurl_read(h, &hdr, 1) != 1)
163		✗	return AVERROR(EIO);
164
165		✗	return ff_rtmp_packet_read_internal(h, p, chunk_size, prev_pkt,
166			nb_prev_pkt, hdr);
167			}
168
169		✗	static int rtmp_packet_read_one_chunk(URLContext *h, RTMPPacket *p,
170			int chunk_size, RTMPPacket **prev_pkt_ptr,
171			int *nb_prev_pkt, uint8_t hdr)
172			{
173
174			uint8_t buf[16];
175			int channel_id, timestamp, size;
176			uint32_t ts_field; // non-extended timestamp or delta field
177		✗	uint32_t extra = 0;
178			enum RTMPPacketType type;
179		✗	int written = 0;
180			int ret, toread;
181			RTMPPacket *prev_pkt;
182
183		✗	written++;
184		✗	channel_id = hdr & 0x3F;
185
186		✗	if (channel_id < 2) { //special case for channel number >= 64
187		✗	buf[1] = 0;
188		✗	if (ffurl_read_complete(h, buf, channel_id + 1) != channel_id + 1)
189		✗	return AVERROR(EIO);
190		✗	written += channel_id + 1;
191		✗	channel_id = AV_RL16(buf) + 64;
192			}
193		✗	if ((ret = ff_rtmp_check_alloc_array(prev_pkt_ptr, nb_prev_pkt,
194			channel_id)) < 0)
195		✗	return ret;
196		✗	prev_pkt = *prev_pkt_ptr;
197		✗	size = prev_pkt[channel_id].size;
198		✗	type = prev_pkt[channel_id].type;
199		✗	extra = prev_pkt[channel_id].extra;
200
201		✗	hdr >>= 6; // header size indicator
202		✗	if (hdr == RTMP_PS_ONEBYTE) {
203		✗	ts_field = prev_pkt[channel_id].ts_field;
204			} else {
205		✗	if (ffurl_read_complete(h, buf, 3) != 3)
206		✗	return AVERROR(EIO);
207		✗	written += 3;
208		✗	ts_field = AV_RB24(buf);
209		✗	if (hdr != RTMP_PS_FOURBYTES) {
210		✗	if (ffurl_read_complete(h, buf, 3) != 3)
211		✗	return AVERROR(EIO);
212		✗	written += 3;
213		✗	size = AV_RB24(buf);
214		✗	if (ffurl_read_complete(h, buf, 1) != 1)
215		✗	return AVERROR(EIO);
216		✗	written++;
217		✗	type = buf[0];
218		✗	if (hdr == RTMP_PS_TWELVEBYTES) {
219		✗	if (ffurl_read_complete(h, buf, 4) != 4)
220		✗	return AVERROR(EIO);
221		✗	written += 4;
222		✗	extra = AV_RL32(buf);
223			}
224			}
225			}
226		✗	if (ts_field == 0xFFFFFF) {
227		✗	if (ffurl_read_complete(h, buf, 4) != 4)
228		✗	return AVERROR(EIO);
229		✗	timestamp = AV_RB32(buf);
230			} else {
231		✗	timestamp = ts_field;
232			}
233		✗	if (hdr != RTMP_PS_TWELVEBYTES)
234		✗	timestamp += prev_pkt[channel_id].timestamp;
235
236		✗	if (prev_pkt[channel_id].read && size != prev_pkt[channel_id].size) {
237		✗	av_log(h, AV_LOG_ERROR, "RTMP packet size mismatch %d != %d\n",
238		✗	size, prev_pkt[channel_id].size);
239		✗	ff_rtmp_packet_destroy(&prev_pkt[channel_id]);
240		✗	prev_pkt[channel_id].read = 0;
241		✗	return AVERROR_INVALIDDATA;
242			}
243
244		✗	if (!prev_pkt[channel_id].read) {
245		✗	if ((ret = ff_rtmp_packet_create(p, channel_id, type, timestamp,
246			size)) < 0)
247		✗	return ret;
248		✗	p->read = written;
249		✗	p->offset = 0;
250		✗	prev_pkt[channel_id].ts_field = ts_field;
251		✗	prev_pkt[channel_id].timestamp = timestamp;
252			} else {
253			// previous packet in this channel hasn't completed reading
254		✗	RTMPPacket *prev = &prev_pkt[channel_id];
255		✗	p->data = prev->data;
256		✗	p->size = prev->size;
257		✗	p->channel_id = prev->channel_id;
258		✗	p->type = prev->type;
259		✗	p->ts_field = prev->ts_field;
260		✗	p->extra = prev->extra;
261		✗	p->offset = prev->offset;
262		✗	p->read = prev->read + written;
263		✗	p->timestamp = prev->timestamp;
264		✗	prev->data = NULL;
265			}
266		✗	p->extra = extra;
267			// save history
268		✗	prev_pkt[channel_id].channel_id = channel_id;
269		✗	prev_pkt[channel_id].type = type;
270		✗	prev_pkt[channel_id].size = size;
271		✗	prev_pkt[channel_id].extra = extra;
272		✗	size = size - p->offset;
273
274		✗	toread = FFMIN(size, chunk_size);
275		✗	if (ffurl_read_complete(h, p->data + p->offset, toread) != toread) {
276		✗	ff_rtmp_packet_destroy(p);
277		✗	return AVERROR(EIO);
278			}
279		✗	size -= toread;
280		✗	p->read += toread;
281		✗	p->offset += toread;
282
283		✗	if (size > 0) {
284		✗	RTMPPacket *prev = &prev_pkt[channel_id];
285		✗	prev->data = p->data;
286		✗	prev->read = p->read;
287		✗	prev->offset = p->offset;
288		✗	p->data = NULL;
289		✗	return AVERROR(EAGAIN);
290			}
291
292		✗	prev_pkt[channel_id].read = 0; // read complete; reset if needed
293		✗	return p->read;
294			}
295
296		✗	int ff_rtmp_packet_read_internal(URLContext *h, RTMPPacket *p, int chunk_size,
297			RTMPPacket **prev_pkt, int *nb_prev_pkt,
298			uint8_t hdr)
299			{
300		✗	while (1) {
301		✗	int ret = rtmp_packet_read_one_chunk(h, p, chunk_size, prev_pkt,
302			nb_prev_pkt, hdr);
303		✗	if (ret > 0 || ret != AVERROR(EAGAIN))
304		✗	return ret;
305
306		✗	if (ffurl_read(h, &hdr, 1) != 1)
307		✗	return AVERROR(EIO);
308			}
309			}
310
311		✗	int ff_rtmp_packet_write(URLContext *h, RTMPPacket *pkt,
312			int chunk_size, RTMPPacket **prev_pkt_ptr,
313			int *nb_prev_pkt)
314			{
315		✗	uint8_t pkt_hdr[16], *p = pkt_hdr;
316		✗	int mode = RTMP_PS_TWELVEBYTES;
317		✗	int off = 0;
318		✗	int written = 0;
319			int ret;
320			RTMPPacket *prev_pkt;
321			int use_delta; // flag if using timestamp delta, not RTMP_PS_TWELVEBYTES
322			uint32_t timestamp; // full 32-bit timestamp or delta value
323
324		✗	if ((ret = ff_rtmp_check_alloc_array(prev_pkt_ptr, nb_prev_pkt,
325			pkt->channel_id)) < 0)
326		✗	return ret;
327		✗	prev_pkt = *prev_pkt_ptr;
328
329			//if channel_id = 0, this is first presentation of prev_pkt, send full hdr.
330		✗	use_delta = prev_pkt[pkt->channel_id].channel_id &&
331		✗	pkt->extra == prev_pkt[pkt->channel_id].extra &&
332		✗	pkt->timestamp >= prev_pkt[pkt->channel_id].timestamp;
333
334		✗	timestamp = pkt->timestamp;
335		✗	if (use_delta) {
336		✗	timestamp -= prev_pkt[pkt->channel_id].timestamp;
337			}
338		✗	if (timestamp >= 0xFFFFFF) {
339		✗	pkt->ts_field = 0xFFFFFF;
340			} else {
341		✗	pkt->ts_field = timestamp;
342			}
343
344		✗	if (use_delta) {
345		✗	if (pkt->type == prev_pkt[pkt->channel_id].type &&
346		✗	pkt->size == prev_pkt[pkt->channel_id].size) {
347		✗	mode = RTMP_PS_FOURBYTES;
348		✗	if (pkt->ts_field == prev_pkt[pkt->channel_id].ts_field)
349		✗	mode = RTMP_PS_ONEBYTE;
350			} else {
351		✗	mode = RTMP_PS_EIGHTBYTES;
352			}
353			}
354
355		✗	if (pkt->channel_id < 64) {
356		✗	bytestream_put_byte(&p, pkt->channel_id | (mode << 6));
357		✗	} else if (pkt->channel_id < 64 + 256) {
358		✗	bytestream_put_byte(&p, 0 | (mode << 6));
359		✗	bytestream_put_byte(&p, pkt->channel_id - 64);
360			} else {
361		✗	bytestream_put_byte(&p, 1 | (mode << 6));
362		✗	bytestream_put_le16(&p, pkt->channel_id - 64);
363			}
364		✗	if (mode != RTMP_PS_ONEBYTE) {
365		✗	bytestream_put_be24(&p, pkt->ts_field);
366		✗	if (mode != RTMP_PS_FOURBYTES) {
367		✗	bytestream_put_be24(&p, pkt->size);
368		✗	bytestream_put_byte(&p, pkt->type);
369		✗	if (mode == RTMP_PS_TWELVEBYTES)
370		✗	bytestream_put_le32(&p, pkt->extra);
371			}
372			}
373		✗	if (pkt->ts_field == 0xFFFFFF)
374		✗	bytestream_put_be32(&p, timestamp);
375			// save history
376		✗	prev_pkt[pkt->channel_id].channel_id = pkt->channel_id;
377		✗	prev_pkt[pkt->channel_id].type = pkt->type;
378		✗	prev_pkt[pkt->channel_id].size = pkt->size;
379		✗	prev_pkt[pkt->channel_id].timestamp = pkt->timestamp;
380		✗	prev_pkt[pkt->channel_id].ts_field = pkt->ts_field;
381		✗	prev_pkt[pkt->channel_id].extra = pkt->extra;
382
383			// FIXME:
384			// Writing packets is currently not optimized to minimize system calls.
385			// Since system calls flush on exit which we cannot change in a system-independant way.
386			// We should fix this behavior and by writing packets in a single or in as few as possible system calls.
387			// Protocols like TCP and RTMP should benefit from this when enabling TCP_NODELAY.
388
389		✗	if ((ret = ffurl_write(h, pkt_hdr, p - pkt_hdr)) < 0)
390		✗	return ret;
391		✗	written = p - pkt_hdr + pkt->size;
392		✗	while (off < pkt->size) {
393		✗	int towrite = FFMIN(chunk_size, pkt->size - off);
394		✗	if ((ret = ffurl_write(h, pkt->data + off, towrite)) < 0)
395		✗	return ret;
396		✗	off += towrite;
397		✗	if (off < pkt->size) {
398		✗	uint8_t marker = 0xC0 | pkt->channel_id;
399		✗	if ((ret = ffurl_write(h, &marker, 1)) < 0)
400		✗	return ret;
401		✗	written++;
402		✗	if (pkt->ts_field == 0xFFFFFF) {
403			uint8_t ts_header[4];
404		✗	AV_WB32(ts_header, timestamp);
405		✗	if ((ret = ffurl_write(h, ts_header, 4)) < 0)
406		✗	return ret;
407		✗	written += 4;
408			}
409			}
410			}
411		✗	return written;
412			}
413
414		✗	int ff_rtmp_packet_create(RTMPPacket *pkt, int channel_id, RTMPPacketType type,
415			int timestamp, int size)
416			{
417		✗	if (size) {
418		✗	pkt->data = av_realloc(NULL, size);
419		✗	if (!pkt->data)
420		✗	return AVERROR(ENOMEM);
421			}
422		✗	pkt->size = size;
423		✗	pkt->channel_id = channel_id;
424		✗	pkt->type = type;
425		✗	pkt->timestamp = timestamp;
426		✗	pkt->extra = 0;
427		✗	pkt->ts_field = 0;
428
429		✗	return 0;
430			}
431
432		✗	void ff_rtmp_packet_destroy(RTMPPacket *pkt)
433			{
434		✗	if (!pkt)
435		✗	return;
436		✗	av_freep(&pkt->data);
437		✗	pkt->size = 0;
438			}
439
440		✗	static int amf_tag_skip(GetByteContext *gb)
441			{
442			AMFDataType type;
443		✗	unsigned nb = -1;
444		✗	int parse_key = 1;
445
446		✗	if (bytestream2_get_bytes_left(gb) < 1)
447		✗	return -1;
448
449		✗	type = bytestream2_get_byte(gb);
450		✗	switch (type) {
451		✗	case AMF_DATA_TYPE_NUMBER:
452		✗	bytestream2_get_be64(gb);
453		✗	return 0;
454		✗	case AMF_DATA_TYPE_BOOL:
455		✗	bytestream2_get_byte(gb);
456		✗	return 0;
457		✗	case AMF_DATA_TYPE_STRING:
458		✗	bytestream2_skip(gb, bytestream2_get_be16(gb));
459		✗	return 0;
460		✗	case AMF_DATA_TYPE_LONG_STRING:
461		✗	bytestream2_skip(gb, bytestream2_get_be32(gb));
462		✗	return 0;
463		✗	case AMF_DATA_TYPE_NULL:
464		✗	return 0;
465		✗	case AMF_DATA_TYPE_DATE:
466		✗	bytestream2_skip(gb, 10);
467		✗	return 0;
468		✗	case AMF_DATA_TYPE_ARRAY:
469		✗	parse_key = 0;
470		✗	case AMF_DATA_TYPE_MIXEDARRAY:
471		✗	nb = bytestream2_get_be32(gb);
472		✗	case AMF_DATA_TYPE_OBJECT:
473		✗	while (nb-- > 0 || type != AMF_DATA_TYPE_ARRAY) {
474			int t;
475		✗	if (parse_key) {
476		✗	int size = bytestream2_get_be16(gb);
477		✗	if (!size) {
478		✗	bytestream2_get_byte(gb);
479		✗	break;
480			}
481		✗	if (size < 0 || size >= bytestream2_get_bytes_left(gb))
482		✗	return -1;
483		✗	bytestream2_skip(gb, size);
484			}
485		✗	t = amf_tag_skip(gb);
486		✗	if (t < 0 || bytestream2_get_bytes_left(gb) <= 0)
487		✗	return -1;
488			}
489		✗	return 0;
490		✗	case AMF_DATA_TYPE_OBJECT_END: return 0;
491		✗	default: return -1;
492			}
493			}
494
495		✗	int ff_amf_tag_size(const uint8_t *data, const uint8_t *data_end)
496			{
497			GetByteContext gb;
498			int ret;
499
500		✗	if (data >= data_end)
501		✗	return -1;
502
503		✗	bytestream2_init(&gb, data, data_end - data);
504
505		✗	ret = amf_tag_skip(&gb);
506		✗	if (ret < 0 || bytestream2_get_bytes_left(&gb) <= 0)
507		✗	return -1;
508		✗	av_assert0(bytestream2_tell(&gb) >= 0 && bytestream2_tell(&gb) <= data_end - data);
509		✗	return bytestream2_tell(&gb);
510			}
511
512		✗	static int amf_get_field_value2(GetByteContext *gb,
513			const uint8_t *name, uint8_t *dst, int dst_size)
514			{
515		✗	int namelen = strlen(name);
516			int len;
517
518		✗	while (bytestream2_peek_byte(gb) != AMF_DATA_TYPE_OBJECT && bytestream2_get_bytes_left(gb) > 0) {
519		✗	int ret = amf_tag_skip(gb);
520		✗	if (ret < 0)
521		✗	return -1;
522			}
523		✗	if (bytestream2_get_bytes_left(gb) < 3)
524		✗	return -1;
525		✗	bytestream2_get_byte(gb);
526
527		✗	for (;;) {
528		✗	int size = bytestream2_get_be16(gb);
529		✗	if (!size)
530		✗	break;
531		✗	if (size < 0 || size >= bytestream2_get_bytes_left(gb))
532		✗	return -1;
533		✗	bytestream2_skip(gb, size);
534		✗	if (size == namelen && !memcmp(gb->buffer-size, name, namelen)) {
535		✗	switch (bytestream2_get_byte(gb)) {
536		✗	case AMF_DATA_TYPE_NUMBER:
537		✗	snprintf(dst, dst_size, "%g", av_int2double(bytestream2_get_be64(gb)));
538		✗	break;
539		✗	case AMF_DATA_TYPE_BOOL:
540		✗	snprintf(dst, dst_size, "%s", bytestream2_get_byte(gb) ? "true" : "false");
541		✗	break;
542		✗	case AMF_DATA_TYPE_STRING:
543		✗	len = bytestream2_get_be16(gb);
544		✗	if (dst_size < 1)
545		✗	return -1;
546		✗	if (dst_size < len + 1)
547		✗	len = dst_size - 1;
548		✗	bytestream2_get_buffer(gb, dst, len);
549		✗	dst[len] = 0;
550		✗	break;
551		✗	default:
552		✗	return -1;
553			}
554		✗	return 0;
555			}
556		✗	len = amf_tag_skip(gb);
557		✗	if (len < 0 || bytestream2_get_bytes_left(gb) <= 0)
558		✗	return -1;
559			}
560		✗	return -1;
561			}
562
563		✗	int ff_amf_get_field_value(const uint8_t *data, const uint8_t *data_end,
564			const uint8_t *name, uint8_t *dst, int dst_size)
565			{
566			GetByteContext gb;
567
568		✗	if (data >= data_end)
569		✗	return -1;
570
571		✗	bytestream2_init(&gb, data, data_end - data);
572
573		✗	return amf_get_field_value2(&gb, name, dst, dst_size);
574			}
575
576			#ifdef DEBUG
577			static const char* rtmp_packet_type(int type)
578			{
579			switch (type) {
580			case RTMP_PT_CHUNK_SIZE: return "chunk size";
581			case RTMP_PT_BYTES_READ: return "bytes read";
582			case RTMP_PT_USER_CONTROL: return "user control";
583			case RTMP_PT_WINDOW_ACK_SIZE: return "window acknowledgement size";
584			case RTMP_PT_SET_PEER_BW: return "set peer bandwidth";
585			case RTMP_PT_AUDIO: return "audio packet";
586			case RTMP_PT_VIDEO: return "video packet";
587			case RTMP_PT_FLEX_STREAM: return "Flex shared stream";
588			case RTMP_PT_FLEX_OBJECT: return "Flex shared object";
589			case RTMP_PT_FLEX_MESSAGE: return "Flex shared message";
590			case RTMP_PT_NOTIFY: return "notification";
591			case RTMP_PT_SHARED_OBJ: return "shared object";
592			case RTMP_PT_INVOKE: return "invoke";
593			case RTMP_PT_METADATA: return "metadata";
594			default: return "unknown";
595			}
596			}
597
598			static void amf_tag_contents(void *ctx, const uint8_t *data,
599			const uint8_t *data_end)
600			{
601			unsigned int size, nb = -1;
602			char buf[1024];
603			AMFDataType type;
604			int parse_key = 1;
605
606			if (data >= data_end)
607			return;
608			switch ((type = *data++)) {
609			case AMF_DATA_TYPE_NUMBER:
610			av_log(ctx, AV_LOG_DEBUG, " number %g\n", av_int2double(AV_RB64(data)));
611			return;
612			case AMF_DATA_TYPE_BOOL:
613			av_log(ctx, AV_LOG_DEBUG, " bool %d\n", *data);
614			return;
615			case AMF_DATA_TYPE_STRING:
616			case AMF_DATA_TYPE_LONG_STRING:
617			if (type == AMF_DATA_TYPE_STRING) {
618			size = bytestream_get_be16(&data);
619			} else {
620			size = bytestream_get_be32(&data);
621			}
622			size = FFMIN(size, sizeof(buf) - 1);
623			memcpy(buf, data, size);
624			buf[size] = 0;
625			av_log(ctx, AV_LOG_DEBUG, " string '%s'\n", buf);
626			return;
627			case AMF_DATA_TYPE_NULL:
628			av_log(ctx, AV_LOG_DEBUG, " NULL\n");
629			return;
630			case AMF_DATA_TYPE_ARRAY:
631			parse_key = 0;
632			case AMF_DATA_TYPE_MIXEDARRAY:
633			nb = bytestream_get_be32(&data);
634			case AMF_DATA_TYPE_OBJECT:
635			av_log(ctx, AV_LOG_DEBUG, " {\n");
636			while (nb-- > 0 || type != AMF_DATA_TYPE_ARRAY) {
637			int t;
638			if (parse_key) {
639			size = bytestream_get_be16(&data);
640			size = FFMIN(size, sizeof(buf) - 1);
641			if (!size) {
642			av_log(ctx, AV_LOG_DEBUG, " }\n");
643			data++;
644			break;
645			}
646			memcpy(buf, data, size);
647			buf[size] = 0;
648			if (size >= data_end - data)
649			return;
650			data += size;
651			av_log(ctx, AV_LOG_DEBUG, " %s: ", buf);
652			}
653			amf_tag_contents(ctx, data, data_end);
654			t = ff_amf_tag_size(data, data_end);
655			if (t < 0 || t >= data_end - data)
656			return;
657			data += t;
658			}
659			return;
660			case AMF_DATA_TYPE_OBJECT_END:
661			av_log(ctx, AV_LOG_DEBUG, " }\n");
662			return;
663			default:
664			return;
665			}
666			}
667
668			void ff_rtmp_packet_dump(void *ctx, RTMPPacket *p)
669			{
670			av_log(ctx, AV_LOG_DEBUG, "RTMP packet type '%s'(%d) for channel %d, timestamp %d, extra field %d size %d\n",
671			rtmp_packet_type(p->type), p->type, p->channel_id, p->timestamp, p->extra, p->size);
672			if (p->type == RTMP_PT_INVOKE || p->type == RTMP_PT_NOTIFY) {
673			uint8_t *src = p->data, *src_end = p->data + p->size;
674			while (src < src_end) {
675			int sz;
676			amf_tag_contents(ctx, src, src_end);
677			sz = ff_amf_tag_size(src, src_end);
678			if (sz < 0)
679			break;
680			src += sz;
681			}
682			} else if (p->type == RTMP_PT_WINDOW_ACK_SIZE) {
683			av_log(ctx, AV_LOG_DEBUG, "Window acknowledgement size = %d\n", AV_RB32(p->data));
684			} else if (p->type == RTMP_PT_SET_PEER_BW) {
685			av_log(ctx, AV_LOG_DEBUG, "Set Peer BW = %d\n", AV_RB32(p->data));
686			} else if (p->type != RTMP_PT_AUDIO && p->type != RTMP_PT_VIDEO && p->type != RTMP_PT_METADATA) {
687			int i;
688			for (i = 0; i < p->size; i++)
689			av_log(ctx, AV_LOG_DEBUG, " %02X", p->data[i]);
690			av_log(ctx, AV_LOG_DEBUG, "\n");
691			}
692			}
693			#endif
694
695		✗	int ff_amf_match_string(const uint8_t *data, int size, const char *str)
696			{
697		✗	int len = strlen(str);
698			int amf_len, type;
699
700		✗	if (size < 1)
701		✗	return 0;
702
703		✗	type = *data++;
704
705		✗	if (type != AMF_DATA_TYPE_LONG_STRING &&
706			type != AMF_DATA_TYPE_STRING)
707		✗	return 0;
708
709		✗	if (type == AMF_DATA_TYPE_LONG_STRING) {
710		✗	if ((size -= 4 + 1) < 0)
711		✗	return 0;
712		✗	amf_len = bytestream_get_be32(&data);
713			} else {
714		✗	if ((size -= 2 + 1) < 0)
715		✗	return 0;
716		✗	amf_len = bytestream_get_be16(&data);
717			}
718
719		✗	if (amf_len > size)
720		✗	return 0;
721
722		✗	if (amf_len != len)
723		✗	return 0;
724
725		✗	return !memcmp(data, str, len);
726			}
727