Commit | Line | Data |
---|---|---|
9fd6b843 KS |
1 | /* |
2 | * RTMP network protocol | |
3 | * Copyright (c) 2009 Kostya 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 | /** | |
23 | * @file libavformat/rtmpproto.c | |
24 | * RTMP protocol | |
25 | */ | |
26 | ||
27 | #include "libavcodec/bytestream.h" | |
28 | #include "libavutil/avstring.h" | |
29 | #include "libavutil/lfg.h" | |
30 | #include "libavutil/sha.h" | |
31 | #include "avformat.h" | |
32 | ||
33 | #include "network.h" | |
34 | ||
35 | #include "flv.h" | |
36 | #include "rtmp.h" | |
37 | #include "rtmppkt.h" | |
38 | ||
39 | /* we can't use av_log() with URLContext yet... */ | |
40 | #if LIBAVFORMAT_VERSION_MAJOR < 53 | |
41 | #define LOG_CONTEXT NULL | |
42 | #else | |
43 | #define LOG_CONTEXT s | |
44 | #endif | |
45 | ||
cfac91fe KS |
46 | //#define DEBUG |
47 | ||
9fd6b843 KS |
48 | /** RTMP protocol handler state */ |
49 | typedef enum { | |
50 | STATE_START, ///< client has not done anything yet | |
51 | STATE_HANDSHAKED, ///< client has performed handshake | |
6bf22e18 S |
52 | STATE_RELEASING, ///< client releasing stream before publish it (for output) |
53 | STATE_FCPUBLISH, ///< client FCPublishing stream (for output) | |
9fd6b843 KS |
54 | STATE_CONNECTING, ///< client connected to server successfully |
55 | STATE_READY, ///< client has sent all needed commands and waits for server reply | |
56 | STATE_PLAYING, ///< client has started receiving multimedia data from server | |
6bf22e18 | 57 | STATE_PUBLISHING, ///< client has started sending multimedia data to server (for output) |
72b870b9 | 58 | STATE_STOPPED, ///< the broadcast has been stopped |
9fd6b843 KS |
59 | } ClientState; |
60 | ||
61 | /** protocol handler context */ | |
62 | typedef struct RTMPContext { | |
63 | URLContext* stream; ///< TCP stream used in interactions with RTMP server | |
64 | RTMPPacket prev_pkt[2][RTMP_CHANNELS]; ///< packet history used when reading and sending packets | |
65 | int chunk_size; ///< size of the chunks RTMP packets are divided into | |
b316991b | 66 | int is_input; ///< input/output flag |
9fd6b843 | 67 | char playpath[256]; ///< path to filename to play (with possible "mp4:" prefix) |
5e9ad759 | 68 | char app[128]; ///< application |
9fd6b843 KS |
69 | ClientState state; ///< current state |
70 | int main_channel_id; ///< an additional channel ID which is used for some invocations | |
71 | uint8_t* flv_data; ///< buffer with data for demuxer | |
72 | int flv_size; ///< current buffer size | |
73 | int flv_off; ///< number of bytes read from current buffer | |
6bf22e18 | 74 | RTMPPacket out_pkt; ///< rtmp packet, created from flv a/v or metadata (for output) |
9fd6b843 KS |
75 | } RTMPContext; |
76 | ||
77 | #define PLAYER_KEY_OPEN_PART_LEN 30 ///< length of partial key used for first client digest signing | |
78 | /** Client key used for digest signing */ | |
79 | static const uint8_t rtmp_player_key[] = { | |
80 | 'G', 'e', 'n', 'u', 'i', 'n', 'e', ' ', 'A', 'd', 'o', 'b', 'e', ' ', | |
81 | 'F', 'l', 'a', 's', 'h', ' ', 'P', 'l', 'a', 'y', 'e', 'r', ' ', '0', '0', '1', | |
82 | ||
83 | 0xF0, 0xEE, 0xC2, 0x4A, 0x80, 0x68, 0xBE, 0xE8, 0x2E, 0x00, 0xD0, 0xD1, 0x02, | |
84 | 0x9E, 0x7E, 0x57, 0x6E, 0xEC, 0x5D, 0x2D, 0x29, 0x80, 0x6F, 0xAB, 0x93, 0xB8, | |
85 | 0xE6, 0x36, 0xCF, 0xEB, 0x31, 0xAE | |
86 | }; | |
87 | ||
88 | #define SERVER_KEY_OPEN_PART_LEN 36 ///< length of partial key used for first server digest signing | |
89 | /** Key used for RTMP server digest signing */ | |
90 | static const uint8_t rtmp_server_key[] = { | |
91 | 'G', 'e', 'n', 'u', 'i', 'n', 'e', ' ', 'A', 'd', 'o', 'b', 'e', ' ', | |
92 | 'F', 'l', 'a', 's', 'h', ' ', 'M', 'e', 'd', 'i', 'a', ' ', | |
93 | 'S', 'e', 'r', 'v', 'e', 'r', ' ', '0', '0', '1', | |
94 | ||
95 | 0xF0, 0xEE, 0xC2, 0x4A, 0x80, 0x68, 0xBE, 0xE8, 0x2E, 0x00, 0xD0, 0xD1, 0x02, | |
96 | 0x9E, 0x7E, 0x57, 0x6E, 0xEC, 0x5D, 0x2D, 0x29, 0x80, 0x6F, 0xAB, 0x93, 0xB8, | |
97 | 0xE6, 0x36, 0xCF, 0xEB, 0x31, 0xAE | |
98 | }; | |
99 | ||
100 | /** | |
101 | * Generates 'connect' call and sends it to the server. | |
102 | */ | |
103 | static void gen_connect(URLContext *s, RTMPContext *rt, const char *proto, | |
5e9ad759 | 104 | const char *host, int port) |
9fd6b843 KS |
105 | { |
106 | RTMPPacket pkt; | |
6bf22e18 | 107 | uint8_t ver[64], *p; |
9fd6b843 KS |
108 | char tcurl[512]; |
109 | ||
31da5966 | 110 | ff_rtmp_packet_create(&pkt, RTMP_SYSTEM_CHANNEL, RTMP_PT_INVOKE, 0, 4096); |
9fd6b843 KS |
111 | p = pkt.data; |
112 | ||
5e9ad759 | 113 | snprintf(tcurl, sizeof(tcurl), "%s://%s:%d/%s", proto, host, port, rt->app); |
9fd6b843 KS |
114 | ff_amf_write_string(&p, "connect"); |
115 | ff_amf_write_number(&p, 1.0); | |
116 | ff_amf_write_object_start(&p); | |
117 | ff_amf_write_field_name(&p, "app"); | |
5e9ad759 | 118 | ff_amf_write_string(&p, rt->app); |
9fd6b843 | 119 | |
6bf22e18 | 120 | if (rt->is_input) { |
c7240611 KS |
121 | snprintf(ver, sizeof(ver), "%s %d,%d,%d,%d", RTMP_CLIENT_PLATFORM, RTMP_CLIENT_VER1, |
122 | RTMP_CLIENT_VER2, RTMP_CLIENT_VER3, RTMP_CLIENT_VER4); | |
6bf22e18 S |
123 | } else { |
124 | snprintf(ver, sizeof(ver), "FMLE/3.0 (compatible; %s)", LIBAVFORMAT_IDENT); | |
125 | ff_amf_write_field_name(&p, "type"); | |
126 | ff_amf_write_string(&p, "nonprivate"); | |
127 | } | |
9fd6b843 KS |
128 | ff_amf_write_field_name(&p, "flashVer"); |
129 | ff_amf_write_string(&p, ver); | |
130 | ff_amf_write_field_name(&p, "tcUrl"); | |
131 | ff_amf_write_string(&p, tcurl); | |
6bf22e18 | 132 | if (rt->is_input) { |
c7240611 KS |
133 | ff_amf_write_field_name(&p, "fpad"); |
134 | ff_amf_write_bool(&p, 0); | |
135 | ff_amf_write_field_name(&p, "capabilities"); | |
136 | ff_amf_write_number(&p, 15.0); | |
137 | ff_amf_write_field_name(&p, "audioCodecs"); | |
138 | ff_amf_write_number(&p, 1639.0); | |
139 | ff_amf_write_field_name(&p, "videoCodecs"); | |
140 | ff_amf_write_number(&p, 252.0); | |
141 | ff_amf_write_field_name(&p, "videoFunction"); | |
142 | ff_amf_write_number(&p, 1.0); | |
6bf22e18 | 143 | } |
9fd6b843 KS |
144 | ff_amf_write_object_end(&p); |
145 | ||
146 | pkt.data_size = p - pkt.data; | |
147 | ||
148 | ff_rtmp_packet_write(rt->stream, &pkt, rt->chunk_size, rt->prev_pkt[1]); | |
f8caa544 | 149 | ff_rtmp_packet_destroy(&pkt); |
9fd6b843 KS |
150 | } |
151 | ||
152 | /** | |
6bf22e18 S |
153 | * Generates 'releaseStream' call and sends it to the server. It should make |
154 | * the server release some channel for media streams. | |
155 | */ | |
156 | static void gen_release_stream(URLContext *s, RTMPContext *rt) | |
157 | { | |
158 | RTMPPacket pkt; | |
159 | uint8_t *p; | |
160 | ||
161 | ff_rtmp_packet_create(&pkt, RTMP_SYSTEM_CHANNEL, RTMP_PT_INVOKE, 0, | |
162 | 29 + strlen(rt->playpath)); | |
163 | ||
164 | av_log(LOG_CONTEXT, AV_LOG_DEBUG, "Releasing stream...\n"); | |
165 | p = pkt.data; | |
166 | ff_amf_write_string(&p, "releaseStream"); | |
167 | ff_amf_write_number(&p, 2.0); | |
168 | ff_amf_write_null(&p); | |
169 | ff_amf_write_string(&p, rt->playpath); | |
170 | ||
171 | ff_rtmp_packet_write(rt->stream, &pkt, rt->chunk_size, rt->prev_pkt[1]); | |
172 | ff_rtmp_packet_destroy(&pkt); | |
173 | } | |
174 | ||
175 | /** | |
176 | * Generates 'FCPublish' call and sends it to the server. It should make | |
177 | * the server preapare for receiving media streams. | |
178 | */ | |
179 | static void gen_fcpublish_stream(URLContext *s, RTMPContext *rt) | |
180 | { | |
181 | RTMPPacket pkt; | |
182 | uint8_t *p; | |
183 | ||
184 | ff_rtmp_packet_create(&pkt, RTMP_SYSTEM_CHANNEL, RTMP_PT_INVOKE, 0, | |
185 | 25 + strlen(rt->playpath)); | |
186 | ||
187 | av_log(LOG_CONTEXT, AV_LOG_DEBUG, "FCPublish stream...\n"); | |
188 | p = pkt.data; | |
189 | ff_amf_write_string(&p, "FCPublish"); | |
190 | ff_amf_write_number(&p, 3.0); | |
191 | ff_amf_write_null(&p); | |
192 | ff_amf_write_string(&p, rt->playpath); | |
193 | ||
194 | ff_rtmp_packet_write(rt->stream, &pkt, rt->chunk_size, rt->prev_pkt[1]); | |
195 | ff_rtmp_packet_destroy(&pkt); | |
196 | } | |
197 | ||
198 | /** | |
199 | * Generates 'FCUnpublish' call and sends it to the server. It should make | |
200 | * the server destroy stream. | |
201 | */ | |
202 | static void gen_fcunpublish_stream(URLContext *s, RTMPContext *rt) | |
203 | { | |
204 | RTMPPacket pkt; | |
205 | uint8_t *p; | |
206 | ||
207 | ff_rtmp_packet_create(&pkt, RTMP_SYSTEM_CHANNEL, RTMP_PT_INVOKE, 0, | |
208 | 27 + strlen(rt->playpath)); | |
209 | ||
210 | av_log(LOG_CONTEXT, AV_LOG_DEBUG, "UnPublishing stream...\n"); | |
211 | p = pkt.data; | |
212 | ff_amf_write_string(&p, "FCUnpublish"); | |
213 | ff_amf_write_number(&p, 5.0); | |
214 | ff_amf_write_null(&p); | |
215 | ff_amf_write_string(&p, rt->playpath); | |
216 | ||
217 | ff_rtmp_packet_write(rt->stream, &pkt, rt->chunk_size, rt->prev_pkt[1]); | |
218 | ff_rtmp_packet_destroy(&pkt); | |
219 | } | |
220 | ||
221 | /** | |
9fd6b843 KS |
222 | * Generates 'createStream' call and sends it to the server. It should make |
223 | * the server allocate some channel for media streams. | |
224 | */ | |
225 | static void gen_create_stream(URLContext *s, RTMPContext *rt) | |
226 | { | |
227 | RTMPPacket pkt; | |
228 | uint8_t *p; | |
229 | ||
230 | av_log(LOG_CONTEXT, AV_LOG_DEBUG, "Creating stream...\n"); | |
31da5966 | 231 | ff_rtmp_packet_create(&pkt, RTMP_SYSTEM_CHANNEL, RTMP_PT_INVOKE, 0, 25); |
9fd6b843 KS |
232 | |
233 | p = pkt.data; | |
234 | ff_amf_write_string(&p, "createStream"); | |
6bf22e18 S |
235 | ff_amf_write_number(&p, rt->is_input ? 3.0 : 4.0); |
236 | ff_amf_write_null(&p); | |
237 | ||
238 | ff_rtmp_packet_write(rt->stream, &pkt, rt->chunk_size, rt->prev_pkt[1]); | |
239 | ff_rtmp_packet_destroy(&pkt); | |
240 | } | |
241 | ||
242 | ||
243 | /** | |
244 | * Generates 'deleteStream' call and sends it to the server. It should make | |
245 | * the server remove some channel for media streams. | |
246 | */ | |
247 | static void gen_delete_stream(URLContext *s, RTMPContext *rt) | |
248 | { | |
249 | RTMPPacket pkt; | |
250 | uint8_t *p; | |
251 | ||
252 | av_log(LOG_CONTEXT, AV_LOG_DEBUG, "Deleting stream...\n"); | |
253 | ff_rtmp_packet_create(&pkt, RTMP_SYSTEM_CHANNEL, RTMP_PT_INVOKE, 0, 34); | |
254 | ||
255 | p = pkt.data; | |
256 | ff_amf_write_string(&p, "deleteStream"); | |
257 | ff_amf_write_number(&p, 0.0); | |
9fd6b843 | 258 | ff_amf_write_null(&p); |
6bf22e18 | 259 | ff_amf_write_number(&p, rt->main_channel_id); |
9fd6b843 KS |
260 | |
261 | ff_rtmp_packet_write(rt->stream, &pkt, rt->chunk_size, rt->prev_pkt[1]); | |
262 | ff_rtmp_packet_destroy(&pkt); | |
263 | } | |
264 | ||
265 | /** | |
266 | * Generates 'play' call and sends it to the server, then pings the server | |
267 | * to start actual playing. | |
268 | */ | |
269 | static void gen_play(URLContext *s, RTMPContext *rt) | |
270 | { | |
271 | RTMPPacket pkt; | |
272 | uint8_t *p; | |
273 | ||
274 | av_log(LOG_CONTEXT, AV_LOG_DEBUG, "Sending play command for '%s'\n", rt->playpath); | |
275 | ff_rtmp_packet_create(&pkt, RTMP_VIDEO_CHANNEL, RTMP_PT_INVOKE, 0, | |
f836fa17 | 276 | 20 + strlen(rt->playpath)); |
9fd6b843 KS |
277 | pkt.extra = rt->main_channel_id; |
278 | ||
279 | p = pkt.data; | |
280 | ff_amf_write_string(&p, "play"); | |
281 | ff_amf_write_number(&p, 0.0); | |
282 | ff_amf_write_null(&p); | |
283 | ff_amf_write_string(&p, rt->playpath); | |
9fd6b843 KS |
284 | |
285 | ff_rtmp_packet_write(rt->stream, &pkt, rt->chunk_size, rt->prev_pkt[1]); | |
286 | ff_rtmp_packet_destroy(&pkt); | |
287 | ||
288 | // set client buffer time disguised in ping packet | |
289 | ff_rtmp_packet_create(&pkt, RTMP_NETWORK_CHANNEL, RTMP_PT_PING, 1, 10); | |
290 | ||
291 | p = pkt.data; | |
292 | bytestream_put_be16(&p, 3); | |
293 | bytestream_put_be32(&p, 1); | |
294 | bytestream_put_be32(&p, 256); //TODO: what is a good value here? | |
295 | ||
296 | ff_rtmp_packet_write(rt->stream, &pkt, rt->chunk_size, rt->prev_pkt[1]); | |
297 | ff_rtmp_packet_destroy(&pkt); | |
298 | } | |
299 | ||
300 | /** | |
6bf22e18 S |
301 | * Generates 'publish' call and sends it to the server. |
302 | */ | |
303 | static void gen_publish(URLContext *s, RTMPContext *rt) | |
304 | { | |
305 | RTMPPacket pkt; | |
306 | uint8_t *p; | |
307 | ||
308 | av_log(LOG_CONTEXT, AV_LOG_DEBUG, "Sending publish command for '%s'\n", rt->playpath); | |
309 | ff_rtmp_packet_create(&pkt, RTMP_SOURCE_CHANNEL, RTMP_PT_INVOKE, 0, | |
310 | 30 + strlen(rt->playpath)); | |
311 | pkt.extra = rt->main_channel_id; | |
312 | ||
313 | p = pkt.data; | |
314 | ff_amf_write_string(&p, "publish"); | |
315 | ff_amf_write_number(&p, 0.0); | |
316 | ff_amf_write_null(&p); | |
317 | ff_amf_write_string(&p, rt->playpath); | |
318 | ff_amf_write_string(&p, "live"); | |
319 | ||
320 | ff_rtmp_packet_write(rt->stream, &pkt, rt->chunk_size, rt->prev_pkt[1]); | |
321 | ff_rtmp_packet_destroy(&pkt); | |
322 | } | |
323 | ||
324 | /** | |
9fd6b843 KS |
325 | * Generates ping reply and sends it to the server. |
326 | */ | |
327 | static void gen_pong(URLContext *s, RTMPContext *rt, RTMPPacket *ppkt) | |
328 | { | |
329 | RTMPPacket pkt; | |
330 | uint8_t *p; | |
331 | ||
332 | ff_rtmp_packet_create(&pkt, RTMP_NETWORK_CHANNEL, RTMP_PT_PING, ppkt->timestamp + 1, 6); | |
333 | p = pkt.data; | |
334 | bytestream_put_be16(&p, 7); | |
4aaebf78 | 335 | bytestream_put_be32(&p, AV_RB32(ppkt->data+2)); |
9fd6b843 KS |
336 | ff_rtmp_packet_write(rt->stream, &pkt, rt->chunk_size, rt->prev_pkt[1]); |
337 | ff_rtmp_packet_destroy(&pkt); | |
338 | } | |
339 | ||
340 | //TODO: Move HMAC code somewhere. Eventually. | |
341 | #define HMAC_IPAD_VAL 0x36 | |
342 | #define HMAC_OPAD_VAL 0x5C | |
343 | ||
344 | /** | |
345 | * Calculates HMAC-SHA2 digest for RTMP handshake packets. | |
346 | * | |
347 | * @param src input buffer | |
348 | * @param len input buffer length (should be 1536) | |
349 | * @param gap offset in buffer where 32 bytes should not be taken into account | |
350 | * when calculating digest (since it will be used to store that digest) | |
351 | * @param key digest key | |
352 | * @param keylen digest key length | |
353 | * @param dst buffer where calculated digest will be stored (32 bytes) | |
354 | */ | |
355 | static void rtmp_calc_digest(const uint8_t *src, int len, int gap, | |
356 | const uint8_t *key, int keylen, uint8_t *dst) | |
357 | { | |
358 | struct AVSHA *sha; | |
359 | uint8_t hmac_buf[64+32] = {0}; | |
360 | int i; | |
361 | ||
362 | sha = av_mallocz(av_sha_size); | |
363 | ||
364 | if (keylen < 64) { | |
365 | memcpy(hmac_buf, key, keylen); | |
366 | } else { | |
367 | av_sha_init(sha, 256); | |
368 | av_sha_update(sha,key, keylen); | |
369 | av_sha_final(sha, hmac_buf); | |
370 | } | |
371 | for (i = 0; i < 64; i++) | |
372 | hmac_buf[i] ^= HMAC_IPAD_VAL; | |
373 | ||
374 | av_sha_init(sha, 256); | |
375 | av_sha_update(sha, hmac_buf, 64); | |
376 | if (gap <= 0) { | |
377 | av_sha_update(sha, src, len); | |
378 | } else { //skip 32 bytes used for storing digest | |
379 | av_sha_update(sha, src, gap); | |
380 | av_sha_update(sha, src + gap + 32, len - gap - 32); | |
381 | } | |
382 | av_sha_final(sha, hmac_buf + 64); | |
383 | ||
384 | for (i = 0; i < 64; i++) | |
385 | hmac_buf[i] ^= HMAC_IPAD_VAL ^ HMAC_OPAD_VAL; //reuse XORed key for opad | |
386 | av_sha_init(sha, 256); | |
387 | av_sha_update(sha, hmac_buf, 64+32); | |
388 | av_sha_final(sha, dst); | |
389 | ||
390 | av_free(sha); | |
391 | } | |
392 | ||
393 | /** | |
394 | * Puts HMAC-SHA2 digest of packet data (except for the bytes where this digest | |
395 | * will be stored) into that packet. | |
396 | * | |
397 | * @param buf handshake data (1536 bytes) | |
398 | * @return offset to the digest inside input data | |
399 | */ | |
400 | static int rtmp_handshake_imprint_with_digest(uint8_t *buf) | |
401 | { | |
402 | int i, digest_pos = 0; | |
403 | ||
404 | for (i = 8; i < 12; i++) | |
405 | digest_pos += buf[i]; | |
406 | digest_pos = (digest_pos % 728) + 12; | |
407 | ||
408 | rtmp_calc_digest(buf, RTMP_HANDSHAKE_PACKET_SIZE, digest_pos, | |
409 | rtmp_player_key, PLAYER_KEY_OPEN_PART_LEN, | |
410 | buf + digest_pos); | |
411 | return digest_pos; | |
412 | } | |
413 | ||
414 | /** | |
415 | * Verifies that the received server response has the expected digest value. | |
416 | * | |
417 | * @param buf handshake data received from the server (1536 bytes) | |
418 | * @param off position to search digest offset from | |
419 | * @return 0 if digest is valid, digest position otherwise | |
420 | */ | |
421 | static int rtmp_validate_digest(uint8_t *buf, int off) | |
422 | { | |
423 | int i, digest_pos = 0; | |
424 | uint8_t digest[32]; | |
425 | ||
426 | for (i = 0; i < 4; i++) | |
427 | digest_pos += buf[i + off]; | |
428 | digest_pos = (digest_pos % 728) + off + 4; | |
429 | ||
430 | rtmp_calc_digest(buf, RTMP_HANDSHAKE_PACKET_SIZE, digest_pos, | |
431 | rtmp_server_key, SERVER_KEY_OPEN_PART_LEN, | |
432 | digest); | |
433 | if (!memcmp(digest, buf + digest_pos, 32)) | |
434 | return digest_pos; | |
435 | return 0; | |
436 | } | |
437 | ||
438 | /** | |
439 | * Performs handshake with the server by means of exchanging pseudorandom data | |
440 | * signed with HMAC-SHA2 digest. | |
441 | * | |
442 | * @return 0 if handshake succeeds, negative value otherwise | |
443 | */ | |
444 | static int rtmp_handshake(URLContext *s, RTMPContext *rt) | |
445 | { | |
446 | AVLFG rnd; | |
447 | uint8_t tosend [RTMP_HANDSHAKE_PACKET_SIZE+1] = { | |
448 | 3, // unencrypted data | |
449 | 0, 0, 0, 0, // client uptime | |
450 | RTMP_CLIENT_VER1, | |
451 | RTMP_CLIENT_VER2, | |
452 | RTMP_CLIENT_VER3, | |
453 | RTMP_CLIENT_VER4, | |
454 | }; | |
455 | uint8_t clientdata[RTMP_HANDSHAKE_PACKET_SIZE]; | |
456 | uint8_t serverdata[RTMP_HANDSHAKE_PACKET_SIZE+1]; | |
457 | int i; | |
458 | int server_pos, client_pos; | |
459 | uint8_t digest[32]; | |
460 | ||
461 | av_log(LOG_CONTEXT, AV_LOG_DEBUG, "Handshaking...\n"); | |
462 | ||
463 | av_lfg_init(&rnd, 0xDEADC0DE); | |
464 | // generate handshake packet - 1536 bytes of pseudorandom data | |
465 | for (i = 9; i <= RTMP_HANDSHAKE_PACKET_SIZE; i++) | |
466 | tosend[i] = av_lfg_get(&rnd) >> 24; | |
467 | client_pos = rtmp_handshake_imprint_with_digest(tosend + 1); | |
468 | ||
469 | url_write(rt->stream, tosend, RTMP_HANDSHAKE_PACKET_SIZE + 1); | |
470 | i = url_read_complete(rt->stream, serverdata, RTMP_HANDSHAKE_PACKET_SIZE + 1); | |
471 | if (i != RTMP_HANDSHAKE_PACKET_SIZE + 1) { | |
472 | av_log(LOG_CONTEXT, AV_LOG_ERROR, "Cannot read RTMP handshake response\n"); | |
473 | return -1; | |
474 | } | |
475 | i = url_read_complete(rt->stream, clientdata, RTMP_HANDSHAKE_PACKET_SIZE); | |
476 | if (i != RTMP_HANDSHAKE_PACKET_SIZE) { | |
477 | av_log(LOG_CONTEXT, AV_LOG_ERROR, "Cannot read RTMP handshake response\n"); | |
478 | return -1; | |
479 | } | |
480 | ||
481 | av_log(LOG_CONTEXT, AV_LOG_DEBUG, "Server version %d.%d.%d.%d\n", | |
482 | serverdata[5], serverdata[6], serverdata[7], serverdata[8]); | |
483 | ||
e2ee11e8 | 484 | if (rt->is_input && serverdata[5] >= 3) { |
c7240611 | 485 | server_pos = rtmp_validate_digest(serverdata + 1, 772); |
9fd6b843 | 486 | if (!server_pos) { |
c7240611 KS |
487 | server_pos = rtmp_validate_digest(serverdata + 1, 8); |
488 | if (!server_pos) { | |
489 | av_log(LOG_CONTEXT, AV_LOG_ERROR, "Server response validating failed\n"); | |
490 | return -1; | |
491 | } | |
9fd6b843 | 492 | } |
9fd6b843 | 493 | |
c7240611 KS |
494 | rtmp_calc_digest(tosend + 1 + client_pos, 32, 0, |
495 | rtmp_server_key, sizeof(rtmp_server_key), | |
496 | digest); | |
497 | rtmp_calc_digest(clientdata, RTMP_HANDSHAKE_PACKET_SIZE-32, 0, | |
498 | digest, 32, | |
499 | digest); | |
500 | if (memcmp(digest, clientdata + RTMP_HANDSHAKE_PACKET_SIZE - 32, 32)) { | |
501 | av_log(LOG_CONTEXT, AV_LOG_ERROR, "Signature mismatch\n"); | |
502 | return -1; | |
503 | } | |
9fd6b843 | 504 | |
c7240611 KS |
505 | for (i = 0; i < RTMP_HANDSHAKE_PACKET_SIZE; i++) |
506 | tosend[i] = av_lfg_get(&rnd) >> 24; | |
507 | rtmp_calc_digest(serverdata + 1 + server_pos, 32, 0, | |
508 | rtmp_player_key, sizeof(rtmp_player_key), | |
509 | digest); | |
510 | rtmp_calc_digest(tosend, RTMP_HANDSHAKE_PACKET_SIZE - 32, 0, | |
511 | digest, 32, | |
512 | tosend + RTMP_HANDSHAKE_PACKET_SIZE - 32); | |
513 | ||
514 | // write reply back to the server | |
515 | url_write(rt->stream, tosend, RTMP_HANDSHAKE_PACKET_SIZE); | |
6bf22e18 S |
516 | } else { |
517 | url_write(rt->stream, serverdata+1, RTMP_HANDSHAKE_PACKET_SIZE); | |
518 | } | |
519 | ||
9fd6b843 KS |
520 | return 0; |
521 | } | |
522 | ||
523 | /** | |
524 | * Parses received packet and may perform some action depending on | |
525 | * the packet contents. | |
526 | * @return 0 for no errors, negative values for serious errors which prevent | |
527 | * further communications, positive values for uncritical errors | |
528 | */ | |
529 | static int rtmp_parse_result(URLContext *s, RTMPContext *rt, RTMPPacket *pkt) | |
530 | { | |
531 | int i, t; | |
532 | const uint8_t *data_end = pkt->data + pkt->data_size; | |
533 | ||
cfac91fe KS |
534 | #ifdef DEBUG |
535 | ff_rtmp_packet_dump(LOG_CONTEXT, pkt); | |
536 | #endif | |
537 | ||
9fd6b843 KS |
538 | switch (pkt->type) { |
539 | case RTMP_PT_CHUNK_SIZE: | |
540 | if (pkt->data_size != 4) { | |
541 | av_log(LOG_CONTEXT, AV_LOG_ERROR, | |
542 | "Chunk size change packet is not 4 bytes long (%d)\n", pkt->data_size); | |
543 | return -1; | |
544 | } | |
6bf22e18 S |
545 | if (!rt->is_input) |
546 | ff_rtmp_packet_write(rt->stream, pkt, rt->chunk_size, rt->prev_pkt[1]); | |
9fd6b843 KS |
547 | rt->chunk_size = AV_RB32(pkt->data); |
548 | if (rt->chunk_size <= 0) { | |
549 | av_log(LOG_CONTEXT, AV_LOG_ERROR, "Incorrect chunk size %d\n", rt->chunk_size); | |
550 | return -1; | |
551 | } | |
552 | av_log(LOG_CONTEXT, AV_LOG_DEBUG, "New chunk size = %d\n", rt->chunk_size); | |
553 | break; | |
554 | case RTMP_PT_PING: | |
555 | t = AV_RB16(pkt->data); | |
556 | if (t == 6) | |
557 | gen_pong(s, rt, pkt); | |
558 | break; | |
559 | case RTMP_PT_INVOKE: | |
560 | //TODO: check for the messages sent for wrong state? | |
561 | if (!memcmp(pkt->data, "\002\000\006_error", 9)) { | |
562 | uint8_t tmpstr[256]; | |
563 | ||
564 | if (!ff_amf_get_field_value(pkt->data + 9, data_end, | |
565 | "description", tmpstr, sizeof(tmpstr))) | |
566 | av_log(LOG_CONTEXT, AV_LOG_ERROR, "Server error: %s\n",tmpstr); | |
567 | return -1; | |
568 | } else if (!memcmp(pkt->data, "\002\000\007_result", 10)) { | |
569 | switch (rt->state) { | |
570 | case STATE_HANDSHAKED: | |
6bf22e18 S |
571 | if (!rt->is_input) { |
572 | gen_release_stream(s, rt); | |
573 | gen_fcpublish_stream(s, rt); | |
574 | rt->state = STATE_RELEASING; | |
575 | } else { | |
576 | rt->state = STATE_CONNECTING; | |
577 | } | |
9fd6b843 | 578 | gen_create_stream(s, rt); |
6bf22e18 S |
579 | break; |
580 | case STATE_FCPUBLISH: | |
9fd6b843 KS |
581 | rt->state = STATE_CONNECTING; |
582 | break; | |
6bf22e18 S |
583 | case STATE_RELEASING: |
584 | rt->state = STATE_FCPUBLISH; | |
585 | /* hack for Wowza Media Server, it does not send result for | |
586 | * releaseStream and FCPublish calls */ | |
587 | if (!pkt->data[10]) { | |
588 | int pkt_id = (int) av_int2dbl(AV_RB64(pkt->data + 11)); | |
589 | if (pkt_id == 4) | |
590 | rt->state = STATE_CONNECTING; | |
591 | } | |
e07c92e4 | 592 | if (rt->state != STATE_CONNECTING) |
6bf22e18 | 593 | break; |
9fd6b843 KS |
594 | case STATE_CONNECTING: |
595 | //extract a number from the result | |
596 | if (pkt->data[10] || pkt->data[19] != 5 || pkt->data[20]) { | |
597 | av_log(LOG_CONTEXT, AV_LOG_WARNING, "Unexpected reply on connect()\n"); | |
598 | } else { | |
599 | rt->main_channel_id = (int) av_int2dbl(AV_RB64(pkt->data + 21)); | |
600 | } | |
6bf22e18 | 601 | if (rt->is_input) { |
c7240611 | 602 | gen_play(s, rt); |
6bf22e18 S |
603 | } else { |
604 | gen_publish(s, rt); | |
605 | } | |
9fd6b843 KS |
606 | rt->state = STATE_READY; |
607 | break; | |
608 | } | |
609 | } else if (!memcmp(pkt->data, "\002\000\010onStatus", 11)) { | |
610 | const uint8_t* ptr = pkt->data + 11; | |
611 | uint8_t tmpstr[256]; | |
9fd6b843 KS |
612 | |
613 | for (i = 0; i < 2; i++) { | |
614 | t = ff_amf_tag_size(ptr, data_end); | |
615 | if (t < 0) | |
616 | return 1; | |
617 | ptr += t; | |
618 | } | |
619 | t = ff_amf_get_field_value(ptr, data_end, | |
620 | "level", tmpstr, sizeof(tmpstr)); | |
621 | if (!t && !strcmp(tmpstr, "error")) { | |
622 | if (!ff_amf_get_field_value(ptr, data_end, | |
623 | "description", tmpstr, sizeof(tmpstr))) | |
624 | av_log(LOG_CONTEXT, AV_LOG_ERROR, "Server error: %s\n",tmpstr); | |
625 | return -1; | |
626 | } | |
627 | t = ff_amf_get_field_value(ptr, data_end, | |
628 | "code", tmpstr, sizeof(tmpstr)); | |
6bf22e18 | 629 | if (!t && !strcmp(tmpstr, "NetStream.Play.Start")) rt->state = STATE_PLAYING; |
72b870b9 MS |
630 | if (!t && !strcmp(tmpstr, "NetStream.Play.Stop")) rt->state = STATE_STOPPED; |
631 | if (!t && !strcmp(tmpstr, "NetStream.Play.UnpublishNotify")) rt->state = STATE_STOPPED; | |
6bf22e18 | 632 | if (!t && !strcmp(tmpstr, "NetStream.Publish.Start")) rt->state = STATE_PUBLISHING; |
9fd6b843 KS |
633 | } |
634 | break; | |
635 | } | |
636 | return 0; | |
637 | } | |
638 | ||
639 | /** | |
640 | * Interacts with the server by receiving and sending RTMP packets until | |
641 | * there is some significant data (media data or expected status notification). | |
642 | * | |
643 | * @param s reading context | |
1d8041b3 SS |
644 | * @param for_header non-zero value tells function to work until it |
645 | * gets notification from the server that playing has been started, | |
646 | * otherwise function will work until some media data is received (or | |
647 | * an error happens) | |
9fd6b843 KS |
648 | * @return 0 for successful operation, negative value in case of error |
649 | */ | |
650 | static int get_packet(URLContext *s, int for_header) | |
651 | { | |
652 | RTMPContext *rt = s->priv_data; | |
653 | int ret; | |
654 | ||
72b870b9 MS |
655 | if (rt->state == STATE_STOPPED) |
656 | return AVERROR_EOF; | |
657 | ||
e07c92e4 | 658 | for (;;) { |
9fd6b843 KS |
659 | RTMPPacket rpkt; |
660 | if ((ret = ff_rtmp_packet_read(rt->stream, &rpkt, | |
661 | rt->chunk_size, rt->prev_pkt[0])) != 0) { | |
662 | if (ret > 0) { | |
663 | return AVERROR(EAGAIN); | |
664 | } else { | |
665 | return AVERROR(EIO); | |
666 | } | |
667 | } | |
668 | ||
669 | ret = rtmp_parse_result(s, rt, &rpkt); | |
670 | if (ret < 0) {//serious error in current packet | |
671 | ff_rtmp_packet_destroy(&rpkt); | |
672 | return -1; | |
673 | } | |
72b870b9 MS |
674 | if (rt->state == STATE_STOPPED) { |
675 | ff_rtmp_packet_destroy(&rpkt); | |
676 | return AVERROR_EOF; | |
677 | } | |
6bf22e18 | 678 | if (for_header && (rt->state == STATE_PLAYING || rt->state == STATE_PUBLISHING)) { |
9fd6b843 KS |
679 | ff_rtmp_packet_destroy(&rpkt); |
680 | return 0; | |
681 | } | |
6bf22e18 | 682 | if (!rpkt.data_size || !rt->is_input) { |
9fd6b843 KS |
683 | ff_rtmp_packet_destroy(&rpkt); |
684 | continue; | |
685 | } | |
686 | if (rpkt.type == RTMP_PT_VIDEO || rpkt.type == RTMP_PT_AUDIO || | |
afbacb93 | 687 | (rpkt.type == RTMP_PT_NOTIFY && !memcmp("\002\000\012onMetaData", rpkt.data, 13))) { |
9fd6b843 KS |
688 | uint8_t *p; |
689 | uint32_t ts = rpkt.timestamp; | |
690 | ||
9fd6b843 KS |
691 | // generate packet header and put data into buffer for FLV demuxer |
692 | rt->flv_off = 0; | |
693 | rt->flv_size = rpkt.data_size + 15; | |
694 | rt->flv_data = p = av_realloc(rt->flv_data, rt->flv_size); | |
695 | bytestream_put_byte(&p, rpkt.type); | |
696 | bytestream_put_be24(&p, rpkt.data_size); | |
697 | bytestream_put_be24(&p, ts); | |
698 | bytestream_put_byte(&p, ts >> 24); | |
699 | bytestream_put_be24(&p, 0); | |
700 | bytestream_put_buffer(&p, rpkt.data, rpkt.data_size); | |
701 | bytestream_put_be32(&p, 0); | |
702 | ff_rtmp_packet_destroy(&rpkt); | |
703 | return 0; | |
704 | } else if (rpkt.type == RTMP_PT_METADATA) { | |
705 | // we got raw FLV data, make it available for FLV demuxer | |
706 | rt->flv_off = 0; | |
707 | rt->flv_size = rpkt.data_size; | |
708 | rt->flv_data = av_realloc(rt->flv_data, rt->flv_size); | |
709 | memcpy(rt->flv_data, rpkt.data, rpkt.data_size); | |
710 | ff_rtmp_packet_destroy(&rpkt); | |
711 | return 0; | |
712 | } | |
713 | ff_rtmp_packet_destroy(&rpkt); | |
714 | } | |
715 | return 0; | |
716 | } | |
717 | ||
718 | static int rtmp_close(URLContext *h) | |
719 | { | |
720 | RTMPContext *rt = h->priv_data; | |
721 | ||
e07c92e4 | 722 | if (!rt->is_input) { |
6bf22e18 S |
723 | rt->flv_data = NULL; |
724 | if (rt->out_pkt.data_size) | |
725 | ff_rtmp_packet_destroy(&rt->out_pkt); | |
615c2879 S |
726 | if (rt->state > STATE_FCPUBLISH) |
727 | gen_fcunpublish_stream(h, rt); | |
6bf22e18 | 728 | } |
615c2879 S |
729 | if (rt->state > STATE_HANDSHAKED) |
730 | gen_delete_stream(h, rt); | |
6bf22e18 | 731 | |
9fd6b843 KS |
732 | av_freep(&rt->flv_data); |
733 | url_close(rt->stream); | |
734 | av_free(rt); | |
735 | return 0; | |
736 | } | |
737 | ||
738 | /** | |
739 | * Opens RTMP connection and verifies that the stream can be played. | |
740 | * | |
741 | * URL syntax: rtmp://server[:port][/app][/playpath] | |
742 | * where 'app' is first one or two directories in the path | |
743 | * (e.g. /ondemand/, /flash/live/, etc.) | |
744 | * and 'playpath' is a file name (the rest of the path, | |
745 | * may be prefixed with "mp4:") | |
746 | */ | |
747 | static int rtmp_open(URLContext *s, const char *uri, int flags) | |
748 | { | |
749 | RTMPContext *rt; | |
5e9ad759 | 750 | char proto[8], hostname[256], path[1024], *fname; |
9fd6b843 | 751 | uint8_t buf[2048]; |
b316991b | 752 | int port; |
9fd6b843 KS |
753 | int ret; |
754 | ||
9fd6b843 KS |
755 | rt = av_mallocz(sizeof(RTMPContext)); |
756 | if (!rt) | |
757 | return AVERROR(ENOMEM); | |
758 | s->priv_data = rt; | |
b316991b | 759 | rt->is_input = !(flags & URL_WRONLY); |
9fd6b843 KS |
760 | |
761 | url_split(proto, sizeof(proto), NULL, 0, hostname, sizeof(hostname), &port, | |
762 | path, sizeof(path), s->filename); | |
763 | ||
764 | if (port < 0) | |
765 | port = RTMP_DEFAULT_PORT; | |
766 | snprintf(buf, sizeof(buf), "tcp://%s:%d", hostname, port); | |
767 | ||
fe523958 KS |
768 | if (url_open(&rt->stream, buf, URL_RDWR) < 0) { |
769 | av_log(LOG_CONTEXT, AV_LOG_ERROR, "Cannot open connection %s\n", buf); | |
9fd6b843 | 770 | goto fail; |
fe523958 | 771 | } |
9fd6b843 | 772 | |
c7240611 KS |
773 | rt->state = STATE_START; |
774 | if (rtmp_handshake(s, rt)) | |
775 | return -1; | |
9fd6b843 | 776 | |
c7240611 KS |
777 | rt->chunk_size = 128; |
778 | rt->state = STATE_HANDSHAKED; | |
779 | //extract "app" part from path | |
780 | if (!strncmp(path, "/ondemand/", 10)) { | |
781 | fname = path + 10; | |
782 | memcpy(rt->app, "ondemand", 9); | |
783 | } else { | |
784 | char *p = strchr(path + 1, '/'); | |
785 | if (!p) { | |
786 | fname = path + 1; | |
787 | rt->app[0] = '\0'; | |
9fd6b843 | 788 | } else { |
c7240611 KS |
789 | char *c = strchr(p + 1, ':'); |
790 | fname = strchr(p + 1, '/'); | |
791 | if (!fname || c < fname) { | |
792 | fname = p + 1; | |
793 | av_strlcpy(rt->app, path + 1, p - path); | |
9fd6b843 | 794 | } else { |
c7240611 KS |
795 | fname++; |
796 | av_strlcpy(rt->app, path + 1, fname - path - 1); | |
9fd6b843 KS |
797 | } |
798 | } | |
c7240611 KS |
799 | } |
800 | if (!strchr(fname, ':') && | |
801 | (!strcmp(fname + strlen(fname) - 4, ".f4v") || | |
802 | !strcmp(fname + strlen(fname) - 4, ".mp4"))) { | |
803 | memcpy(rt->playpath, "mp4:", 5); | |
804 | } else { | |
805 | rt->playpath[0] = 0; | |
806 | } | |
807 | strncat(rt->playpath, fname, sizeof(rt->playpath) - 5); | |
9fd6b843 | 808 | |
c7240611 KS |
809 | av_log(LOG_CONTEXT, AV_LOG_DEBUG, "Proto = %s, path = %s, app = %s, fname = %s\n", |
810 | proto, path, rt->app, rt->playpath); | |
811 | gen_connect(s, rt, proto, hostname, port); | |
9fd6b843 | 812 | |
c7240611 KS |
813 | do { |
814 | ret = get_packet(s, 1); | |
815 | } while (ret == EAGAIN); | |
816 | if (ret < 0) | |
817 | goto fail; | |
6bf22e18 S |
818 | |
819 | if (rt->is_input) { | |
9fd6b843 KS |
820 | // generate FLV header for demuxer |
821 | rt->flv_size = 13; | |
822 | rt->flv_data = av_realloc(rt->flv_data, rt->flv_size); | |
823 | rt->flv_off = 0; | |
824 | memcpy(rt->flv_data, "FLV\1\5\0\0\0\011\0\0\0\0", rt->flv_size); | |
6bf22e18 S |
825 | } else { |
826 | rt->flv_size = 0; | |
827 | rt->flv_data = NULL; | |
828 | rt->flv_off = 0; | |
9fd6b843 KS |
829 | } |
830 | ||
831 | s->max_packet_size = url_get_max_packet_size(rt->stream); | |
832 | s->is_streamed = 1; | |
833 | return 0; | |
834 | ||
835 | fail: | |
836 | rtmp_close(s); | |
837 | return AVERROR(EIO); | |
838 | } | |
839 | ||
840 | static int rtmp_read(URLContext *s, uint8_t *buf, int size) | |
841 | { | |
842 | RTMPContext *rt = s->priv_data; | |
843 | int orig_size = size; | |
844 | int ret; | |
845 | ||
846 | while (size > 0) { | |
847 | int data_left = rt->flv_size - rt->flv_off; | |
848 | ||
849 | if (data_left >= size) { | |
850 | memcpy(buf, rt->flv_data + rt->flv_off, size); | |
851 | rt->flv_off += size; | |
852 | return orig_size; | |
853 | } | |
854 | if (data_left > 0) { | |
855 | memcpy(buf, rt->flv_data + rt->flv_off, data_left); | |
856 | buf += data_left; | |
857 | size -= data_left; | |
858 | rt->flv_off = rt->flv_size; | |
859 | } | |
860 | if ((ret = get_packet(s, 0)) < 0) | |
861 | return ret; | |
862 | } | |
863 | return orig_size; | |
864 | } | |
865 | ||
866 | static int rtmp_write(URLContext *h, uint8_t *buf, int size) | |
867 | { | |
6bf22e18 S |
868 | RTMPContext *rt = h->priv_data; |
869 | int size_temp = size; | |
870 | int pktsize, pkttype; | |
871 | uint32_t ts; | |
872 | const uint8_t *buf_temp = buf; | |
873 | ||
874 | if (size < 11) { | |
875 | av_log(LOG_CONTEXT, AV_LOG_DEBUG, "FLV packet too small %d\n", size); | |
876 | return 0; | |
877 | } | |
878 | ||
879 | do { | |
880 | if (!rt->flv_off) { | |
881 | //skip flv header | |
882 | if (buf_temp[0] == 'F' && buf_temp[1] == 'L' && buf_temp[2] == 'V') { | |
883 | buf_temp += 9 + 4; | |
884 | size_temp -= 9 + 4; | |
885 | } | |
886 | ||
887 | pkttype = bytestream_get_byte(&buf_temp); | |
888 | pktsize = bytestream_get_be24(&buf_temp); | |
889 | ts = bytestream_get_be24(&buf_temp); | |
890 | ts |= bytestream_get_byte(&buf_temp) << 24; | |
891 | bytestream_get_be24(&buf_temp); | |
892 | size_temp -= 11; | |
893 | rt->flv_size = pktsize; | |
894 | ||
895 | //force 12bytes header | |
896 | if (((pkttype == RTMP_PT_VIDEO || pkttype == RTMP_PT_AUDIO) && ts == 0) || | |
897 | pkttype == RTMP_PT_NOTIFY) { | |
898 | if (pkttype == RTMP_PT_NOTIFY) | |
899 | pktsize += 16; | |
900 | rt->prev_pkt[1][RTMP_SOURCE_CHANNEL].channel_id = 0; | |
901 | } | |
902 | ||
903 | //this can be a big packet, it's better to send it right here | |
904 | ff_rtmp_packet_create(&rt->out_pkt, RTMP_SOURCE_CHANNEL, pkttype, ts, pktsize); | |
905 | rt->out_pkt.extra = rt->main_channel_id; | |
906 | rt->flv_data = rt->out_pkt.data; | |
907 | ||
908 | if (pkttype == RTMP_PT_NOTIFY) | |
909 | ff_amf_write_string(&rt->flv_data, "@setDataFrame"); | |
910 | } | |
911 | ||
912 | if (rt->flv_size - rt->flv_off > size_temp) { | |
913 | bytestream_get_buffer(&buf_temp, rt->flv_data + rt->flv_off, size_temp); | |
914 | rt->flv_off += size_temp; | |
915 | } else { | |
916 | bytestream_get_buffer(&buf_temp, rt->flv_data + rt->flv_off, rt->flv_size - rt->flv_off); | |
917 | rt->flv_off += rt->flv_size - rt->flv_off; | |
918 | } | |
919 | ||
920 | if (rt->flv_off == rt->flv_size) { | |
921 | bytestream_get_be32(&buf_temp); | |
922 | ||
923 | ff_rtmp_packet_write(rt->stream, &rt->out_pkt, rt->chunk_size, rt->prev_pkt[1]); | |
924 | ff_rtmp_packet_destroy(&rt->out_pkt); | |
925 | rt->flv_size = 0; | |
926 | rt->flv_off = 0; | |
927 | } | |
928 | } while (buf_temp - buf < size_temp); | |
929 | return size; | |
9fd6b843 KS |
930 | } |
931 | ||
932 | URLProtocol rtmp_protocol = { | |
933 | "rtmp", | |
934 | rtmp_open, | |
935 | rtmp_read, | |
936 | rtmp_write, | |
937 | NULL, /* seek */ | |
938 | rtmp_close, | |
939 | }; |