Commit | Line | Data |
---|---|---|
9fd6b843 KS |
1 | /* |
2 | * RTMP network protocol | |
3 | * Copyright (c) 2009 Kostya Shishkov | |
4 | * | |
2912e87a | 5 | * This file is part of Libav. |
9fd6b843 | 6 | * |
2912e87a | 7 | * Libav is free software; you can redistribute it and/or |
9fd6b843 KS |
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 | * | |
2912e87a | 12 | * Libav is distributed in the hope that it will be useful, |
9fd6b843 KS |
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 | |
2912e87a | 18 | * License along with Libav; if not, write to the Free Software |
9fd6b843 KS |
19 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
20 | */ | |
21 | ||
22 | /** | |
ba87f080 | 23 | * @file |
9fd6b843 KS |
24 | * RTMP protocol |
25 | */ | |
26 | ||
27 | #include "libavcodec/bytestream.h" | |
28 | #include "libavutil/avstring.h" | |
ee8aecd2 | 29 | #include "libavutil/intfloat_readwrite.h" |
9fd6b843 KS |
30 | #include "libavutil/lfg.h" |
31 | #include "libavutil/sha.h" | |
32 | #include "avformat.h" | |
e4a9e3cc | 33 | #include "internal.h" |
9fd6b843 KS |
34 | |
35 | #include "network.h" | |
36 | ||
37 | #include "flv.h" | |
38 | #include "rtmp.h" | |
39 | #include "rtmppkt.h" | |
0589da0a | 40 | #include "url.h" |
9fd6b843 | 41 | |
cfac91fe KS |
42 | //#define DEBUG |
43 | ||
9fd6b843 KS |
44 | /** RTMP protocol handler state */ |
45 | typedef enum { | |
46 | STATE_START, ///< client has not done anything yet | |
47 | STATE_HANDSHAKED, ///< client has performed handshake | |
6bf22e18 S |
48 | STATE_RELEASING, ///< client releasing stream before publish it (for output) |
49 | STATE_FCPUBLISH, ///< client FCPublishing stream (for output) | |
9fd6b843 KS |
50 | STATE_CONNECTING, ///< client connected to server successfully |
51 | STATE_READY, ///< client has sent all needed commands and waits for server reply | |
52 | STATE_PLAYING, ///< client has started receiving multimedia data from server | |
6bf22e18 | 53 | STATE_PUBLISHING, ///< client has started sending multimedia data to server (for output) |
72b870b9 | 54 | STATE_STOPPED, ///< the broadcast has been stopped |
9fd6b843 KS |
55 | } ClientState; |
56 | ||
57 | /** protocol handler context */ | |
58 | typedef struct RTMPContext { | |
59 | URLContext* stream; ///< TCP stream used in interactions with RTMP server | |
60 | RTMPPacket prev_pkt[2][RTMP_CHANNELS]; ///< packet history used when reading and sending packets | |
61 | int chunk_size; ///< size of the chunks RTMP packets are divided into | |
b316991b | 62 | int is_input; ///< input/output flag |
9fd6b843 | 63 | char playpath[256]; ///< path to filename to play (with possible "mp4:" prefix) |
5e9ad759 | 64 | char app[128]; ///< application |
9fd6b843 KS |
65 | ClientState state; ///< current state |
66 | int main_channel_id; ///< an additional channel ID which is used for some invocations | |
67 | uint8_t* flv_data; ///< buffer with data for demuxer | |
68 | int flv_size; ///< current buffer size | |
69 | int flv_off; ///< number of bytes read from current buffer | |
6bf22e18 | 70 | RTMPPacket out_pkt; ///< rtmp packet, created from flv a/v or metadata (for output) |
bf7c1719 KS |
71 | uint32_t client_report_size; ///< number of bytes after which client should report to server |
72 | uint32_t bytes_read; ///< number of bytes read from server | |
73 | uint32_t last_bytes_read; ///< number of bytes read last reported to server | |
3ffe32eb | 74 | int skip_bytes; ///< number of bytes to skip from the input FLV stream in the next write call |
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 | /** | |
49bd8e4b | 101 | * Generate 'connect' call and send it to the server. |
9fd6b843 KS |
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 | ||
57b5555c | 113 | ff_url_join(tcurl, sizeof(tcurl), proto, NULL, host, port, "/%s", 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 | /** | |
49bd8e4b | 153 | * Generate 'releaseStream' call and send it to the server. It should make |
6bf22e18 S |
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 | ||
7f804085 | 164 | av_log(s, AV_LOG_DEBUG, "Releasing stream...\n"); |
6bf22e18 S |
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 | /** | |
49bd8e4b | 176 | * Generate 'FCPublish' call and send it to the server. It should make |
6bf22e18 S |
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 | ||
7f804085 | 187 | av_log(s, AV_LOG_DEBUG, "FCPublish stream...\n"); |
6bf22e18 S |
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 | /** | |
49bd8e4b | 199 | * Generate 'FCUnpublish' call and send it to the server. It should make |
6bf22e18 S |
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 | ||
7f804085 | 210 | av_log(s, AV_LOG_DEBUG, "UnPublishing stream...\n"); |
6bf22e18 S |
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 | /** | |
49bd8e4b | 222 | * Generate 'createStream' call and send it to the server. It should make |
9fd6b843 KS |
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 | ||
7f804085 | 230 | av_log(s, 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 | /** | |
49bd8e4b | 244 | * Generate 'deleteStream' call and send it to the server. It should make |
6bf22e18 S |
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 | ||
7f804085 | 252 | av_log(s, AV_LOG_DEBUG, "Deleting stream...\n"); |
6bf22e18 S |
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 | /** | |
49bd8e4b | 266 | * Generate 'play' call and send it to the server, then ping the server |
9fd6b843 KS |
267 | * to start actual playing. |
268 | */ | |
269 | static void gen_play(URLContext *s, RTMPContext *rt) | |
270 | { | |
271 | RTMPPacket pkt; | |
272 | uint8_t *p; | |
273 | ||
7f804085 | 274 | av_log(s, AV_LOG_DEBUG, "Sending play command for '%s'\n", rt->playpath); |
9fd6b843 | 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 | /** | |
49bd8e4b | 301 | * Generate 'publish' call and send it to the server. |
6bf22e18 S |
302 | */ |
303 | static void gen_publish(URLContext *s, RTMPContext *rt) | |
304 | { | |
305 | RTMPPacket pkt; | |
306 | uint8_t *p; | |
307 | ||
7f804085 | 308 | av_log(s, AV_LOG_DEBUG, "Sending publish command for '%s'\n", rt->playpath); |
6bf22e18 S |
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 | /** | |
49bd8e4b | 325 | * Generate ping reply and send it to the server. |
9fd6b843 KS |
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 | ||
bf7c1719 | 340 | /** |
49bd8e4b | 341 | * Generate report on bytes read so far and send it to the server. |
bf7c1719 KS |
342 | */ |
343 | static void gen_bytes_read(URLContext *s, RTMPContext *rt, uint32_t ts) | |
344 | { | |
345 | RTMPPacket pkt; | |
346 | uint8_t *p; | |
347 | ||
348 | ff_rtmp_packet_create(&pkt, RTMP_NETWORK_CHANNEL, RTMP_PT_BYTES_READ, ts, 4); | |
349 | p = pkt.data; | |
350 | bytestream_put_be32(&p, rt->bytes_read); | |
351 | ff_rtmp_packet_write(rt->stream, &pkt, rt->chunk_size, rt->prev_pkt[1]); | |
352 | ff_rtmp_packet_destroy(&pkt); | |
353 | } | |
354 | ||
9fd6b843 KS |
355 | //TODO: Move HMAC code somewhere. Eventually. |
356 | #define HMAC_IPAD_VAL 0x36 | |
357 | #define HMAC_OPAD_VAL 0x5C | |
358 | ||
359 | /** | |
49bd8e4b | 360 | * Calculate HMAC-SHA2 digest for RTMP handshake packets. |
9fd6b843 KS |
361 | * |
362 | * @param src input buffer | |
363 | * @param len input buffer length (should be 1536) | |
364 | * @param gap offset in buffer where 32 bytes should not be taken into account | |
365 | * when calculating digest (since it will be used to store that digest) | |
366 | * @param key digest key | |
367 | * @param keylen digest key length | |
368 | * @param dst buffer where calculated digest will be stored (32 bytes) | |
369 | */ | |
370 | static void rtmp_calc_digest(const uint8_t *src, int len, int gap, | |
371 | const uint8_t *key, int keylen, uint8_t *dst) | |
372 | { | |
373 | struct AVSHA *sha; | |
374 | uint8_t hmac_buf[64+32] = {0}; | |
375 | int i; | |
376 | ||
377 | sha = av_mallocz(av_sha_size); | |
378 | ||
379 | if (keylen < 64) { | |
380 | memcpy(hmac_buf, key, keylen); | |
381 | } else { | |
382 | av_sha_init(sha, 256); | |
383 | av_sha_update(sha,key, keylen); | |
384 | av_sha_final(sha, hmac_buf); | |
385 | } | |
386 | for (i = 0; i < 64; i++) | |
387 | hmac_buf[i] ^= HMAC_IPAD_VAL; | |
388 | ||
389 | av_sha_init(sha, 256); | |
390 | av_sha_update(sha, hmac_buf, 64); | |
391 | if (gap <= 0) { | |
392 | av_sha_update(sha, src, len); | |
393 | } else { //skip 32 bytes used for storing digest | |
394 | av_sha_update(sha, src, gap); | |
395 | av_sha_update(sha, src + gap + 32, len - gap - 32); | |
396 | } | |
397 | av_sha_final(sha, hmac_buf + 64); | |
398 | ||
399 | for (i = 0; i < 64; i++) | |
400 | hmac_buf[i] ^= HMAC_IPAD_VAL ^ HMAC_OPAD_VAL; //reuse XORed key for opad | |
401 | av_sha_init(sha, 256); | |
402 | av_sha_update(sha, hmac_buf, 64+32); | |
403 | av_sha_final(sha, dst); | |
404 | ||
405 | av_free(sha); | |
406 | } | |
407 | ||
408 | /** | |
49bd8e4b | 409 | * Put HMAC-SHA2 digest of packet data (except for the bytes where this digest |
9fd6b843 KS |
410 | * will be stored) into that packet. |
411 | * | |
412 | * @param buf handshake data (1536 bytes) | |
413 | * @return offset to the digest inside input data | |
414 | */ | |
415 | static int rtmp_handshake_imprint_with_digest(uint8_t *buf) | |
416 | { | |
417 | int i, digest_pos = 0; | |
418 | ||
419 | for (i = 8; i < 12; i++) | |
420 | digest_pos += buf[i]; | |
421 | digest_pos = (digest_pos % 728) + 12; | |
422 | ||
423 | rtmp_calc_digest(buf, RTMP_HANDSHAKE_PACKET_SIZE, digest_pos, | |
424 | rtmp_player_key, PLAYER_KEY_OPEN_PART_LEN, | |
425 | buf + digest_pos); | |
426 | return digest_pos; | |
427 | } | |
428 | ||
429 | /** | |
49bd8e4b | 430 | * Verify that the received server response has the expected digest value. |
9fd6b843 KS |
431 | * |
432 | * @param buf handshake data received from the server (1536 bytes) | |
433 | * @param off position to search digest offset from | |
434 | * @return 0 if digest is valid, digest position otherwise | |
435 | */ | |
436 | static int rtmp_validate_digest(uint8_t *buf, int off) | |
437 | { | |
438 | int i, digest_pos = 0; | |
439 | uint8_t digest[32]; | |
440 | ||
441 | for (i = 0; i < 4; i++) | |
442 | digest_pos += buf[i + off]; | |
443 | digest_pos = (digest_pos % 728) + off + 4; | |
444 | ||
445 | rtmp_calc_digest(buf, RTMP_HANDSHAKE_PACKET_SIZE, digest_pos, | |
446 | rtmp_server_key, SERVER_KEY_OPEN_PART_LEN, | |
447 | digest); | |
448 | if (!memcmp(digest, buf + digest_pos, 32)) | |
449 | return digest_pos; | |
450 | return 0; | |
451 | } | |
452 | ||
453 | /** | |
49bd8e4b | 454 | * Perform handshake with the server by means of exchanging pseudorandom data |
9fd6b843 KS |
455 | * signed with HMAC-SHA2 digest. |
456 | * | |
457 | * @return 0 if handshake succeeds, negative value otherwise | |
458 | */ | |
459 | static int rtmp_handshake(URLContext *s, RTMPContext *rt) | |
460 | { | |
461 | AVLFG rnd; | |
462 | uint8_t tosend [RTMP_HANDSHAKE_PACKET_SIZE+1] = { | |
463 | 3, // unencrypted data | |
464 | 0, 0, 0, 0, // client uptime | |
465 | RTMP_CLIENT_VER1, | |
466 | RTMP_CLIENT_VER2, | |
467 | RTMP_CLIENT_VER3, | |
468 | RTMP_CLIENT_VER4, | |
469 | }; | |
470 | uint8_t clientdata[RTMP_HANDSHAKE_PACKET_SIZE]; | |
471 | uint8_t serverdata[RTMP_HANDSHAKE_PACKET_SIZE+1]; | |
472 | int i; | |
473 | int server_pos, client_pos; | |
474 | uint8_t digest[32]; | |
475 | ||
7f804085 | 476 | av_log(s, AV_LOG_DEBUG, "Handshaking...\n"); |
9fd6b843 KS |
477 | |
478 | av_lfg_init(&rnd, 0xDEADC0DE); | |
479 | // generate handshake packet - 1536 bytes of pseudorandom data | |
480 | for (i = 9; i <= RTMP_HANDSHAKE_PACKET_SIZE; i++) | |
481 | tosend[i] = av_lfg_get(&rnd) >> 24; | |
482 | client_pos = rtmp_handshake_imprint_with_digest(tosend + 1); | |
483 | ||
925e908b | 484 | ffurl_write(rt->stream, tosend, RTMP_HANDSHAKE_PACKET_SIZE + 1); |
dce37564 | 485 | i = ffurl_read_complete(rt->stream, serverdata, RTMP_HANDSHAKE_PACKET_SIZE + 1); |
9fd6b843 | 486 | if (i != RTMP_HANDSHAKE_PACKET_SIZE + 1) { |
7f804085 | 487 | av_log(s, AV_LOG_ERROR, "Cannot read RTMP handshake response\n"); |
9fd6b843 KS |
488 | return -1; |
489 | } | |
dce37564 | 490 | i = ffurl_read_complete(rt->stream, clientdata, RTMP_HANDSHAKE_PACKET_SIZE); |
9fd6b843 | 491 | if (i != RTMP_HANDSHAKE_PACKET_SIZE) { |
7f804085 | 492 | av_log(s, AV_LOG_ERROR, "Cannot read RTMP handshake response\n"); |
9fd6b843 KS |
493 | return -1; |
494 | } | |
495 | ||
7f804085 | 496 | av_log(s, AV_LOG_DEBUG, "Server version %d.%d.%d.%d\n", |
9fd6b843 KS |
497 | serverdata[5], serverdata[6], serverdata[7], serverdata[8]); |
498 | ||
e2ee11e8 | 499 | if (rt->is_input && serverdata[5] >= 3) { |
c7240611 | 500 | server_pos = rtmp_validate_digest(serverdata + 1, 772); |
9fd6b843 | 501 | if (!server_pos) { |
c7240611 KS |
502 | server_pos = rtmp_validate_digest(serverdata + 1, 8); |
503 | if (!server_pos) { | |
7f804085 | 504 | av_log(s, AV_LOG_ERROR, "Server response validating failed\n"); |
c7240611 KS |
505 | return -1; |
506 | } | |
9fd6b843 | 507 | } |
9fd6b843 | 508 | |
c7240611 KS |
509 | rtmp_calc_digest(tosend + 1 + client_pos, 32, 0, |
510 | rtmp_server_key, sizeof(rtmp_server_key), | |
511 | digest); | |
512 | rtmp_calc_digest(clientdata, RTMP_HANDSHAKE_PACKET_SIZE-32, 0, | |
513 | digest, 32, | |
514 | digest); | |
515 | if (memcmp(digest, clientdata + RTMP_HANDSHAKE_PACKET_SIZE - 32, 32)) { | |
7f804085 | 516 | av_log(s, AV_LOG_ERROR, "Signature mismatch\n"); |
c7240611 KS |
517 | return -1; |
518 | } | |
9fd6b843 | 519 | |
c7240611 KS |
520 | for (i = 0; i < RTMP_HANDSHAKE_PACKET_SIZE; i++) |
521 | tosend[i] = av_lfg_get(&rnd) >> 24; | |
522 | rtmp_calc_digest(serverdata + 1 + server_pos, 32, 0, | |
523 | rtmp_player_key, sizeof(rtmp_player_key), | |
524 | digest); | |
525 | rtmp_calc_digest(tosend, RTMP_HANDSHAKE_PACKET_SIZE - 32, 0, | |
526 | digest, 32, | |
527 | tosend + RTMP_HANDSHAKE_PACKET_SIZE - 32); | |
528 | ||
529 | // write reply back to the server | |
925e908b | 530 | ffurl_write(rt->stream, tosend, RTMP_HANDSHAKE_PACKET_SIZE); |
6bf22e18 | 531 | } else { |
925e908b | 532 | ffurl_write(rt->stream, serverdata+1, RTMP_HANDSHAKE_PACKET_SIZE); |
6bf22e18 S |
533 | } |
534 | ||
9fd6b843 KS |
535 | return 0; |
536 | } | |
537 | ||
538 | /** | |
49bd8e4b | 539 | * Parse received packet and possibly perform some action depending on |
9fd6b843 KS |
540 | * the packet contents. |
541 | * @return 0 for no errors, negative values for serious errors which prevent | |
542 | * further communications, positive values for uncritical errors | |
543 | */ | |
544 | static int rtmp_parse_result(URLContext *s, RTMPContext *rt, RTMPPacket *pkt) | |
545 | { | |
546 | int i, t; | |
547 | const uint8_t *data_end = pkt->data + pkt->data_size; | |
548 | ||
cfac91fe | 549 | #ifdef DEBUG |
7f804085 | 550 | ff_rtmp_packet_dump(s, pkt); |
cfac91fe KS |
551 | #endif |
552 | ||
9fd6b843 KS |
553 | switch (pkt->type) { |
554 | case RTMP_PT_CHUNK_SIZE: | |
555 | if (pkt->data_size != 4) { | |
7f804085 | 556 | av_log(s, AV_LOG_ERROR, |
9fd6b843 KS |
557 | "Chunk size change packet is not 4 bytes long (%d)\n", pkt->data_size); |
558 | return -1; | |
559 | } | |
6bf22e18 S |
560 | if (!rt->is_input) |
561 | ff_rtmp_packet_write(rt->stream, pkt, rt->chunk_size, rt->prev_pkt[1]); | |
9fd6b843 KS |
562 | rt->chunk_size = AV_RB32(pkt->data); |
563 | if (rt->chunk_size <= 0) { | |
7f804085 | 564 | av_log(s, AV_LOG_ERROR, "Incorrect chunk size %d\n", rt->chunk_size); |
9fd6b843 KS |
565 | return -1; |
566 | } | |
7f804085 | 567 | av_log(s, AV_LOG_DEBUG, "New chunk size = %d\n", rt->chunk_size); |
9fd6b843 KS |
568 | break; |
569 | case RTMP_PT_PING: | |
570 | t = AV_RB16(pkt->data); | |
571 | if (t == 6) | |
572 | gen_pong(s, rt, pkt); | |
573 | break; | |
bf7c1719 KS |
574 | case RTMP_PT_CLIENT_BW: |
575 | if (pkt->data_size < 4) { | |
7f804085 | 576 | av_log(s, AV_LOG_ERROR, |
bf7c1719 KS |
577 | "Client bandwidth report packet is less than 4 bytes long (%d)\n", |
578 | pkt->data_size); | |
579 | return -1; | |
580 | } | |
7f804085 | 581 | av_log(s, AV_LOG_DEBUG, "Client bandwidth = %d\n", AV_RB32(pkt->data)); |
bf7c1719 KS |
582 | rt->client_report_size = AV_RB32(pkt->data) >> 1; |
583 | break; | |
9fd6b843 KS |
584 | case RTMP_PT_INVOKE: |
585 | //TODO: check for the messages sent for wrong state? | |
586 | if (!memcmp(pkt->data, "\002\000\006_error", 9)) { | |
587 | uint8_t tmpstr[256]; | |
588 | ||
589 | if (!ff_amf_get_field_value(pkt->data + 9, data_end, | |
590 | "description", tmpstr, sizeof(tmpstr))) | |
7f804085 | 591 | av_log(s, AV_LOG_ERROR, "Server error: %s\n",tmpstr); |
9fd6b843 KS |
592 | return -1; |
593 | } else if (!memcmp(pkt->data, "\002\000\007_result", 10)) { | |
594 | switch (rt->state) { | |
595 | case STATE_HANDSHAKED: | |
6bf22e18 S |
596 | if (!rt->is_input) { |
597 | gen_release_stream(s, rt); | |
598 | gen_fcpublish_stream(s, rt); | |
599 | rt->state = STATE_RELEASING; | |
600 | } else { | |
601 | rt->state = STATE_CONNECTING; | |
602 | } | |
9fd6b843 | 603 | gen_create_stream(s, rt); |
6bf22e18 S |
604 | break; |
605 | case STATE_FCPUBLISH: | |
9fd6b843 KS |
606 | rt->state = STATE_CONNECTING; |
607 | break; | |
6bf22e18 S |
608 | case STATE_RELEASING: |
609 | rt->state = STATE_FCPUBLISH; | |
610 | /* hack for Wowza Media Server, it does not send result for | |
611 | * releaseStream and FCPublish calls */ | |
612 | if (!pkt->data[10]) { | |
613 | int pkt_id = (int) av_int2dbl(AV_RB64(pkt->data + 11)); | |
614 | if (pkt_id == 4) | |
615 | rt->state = STATE_CONNECTING; | |
616 | } | |
e07c92e4 | 617 | if (rt->state != STATE_CONNECTING) |
6bf22e18 | 618 | break; |
9fd6b843 KS |
619 | case STATE_CONNECTING: |
620 | //extract a number from the result | |
621 | if (pkt->data[10] || pkt->data[19] != 5 || pkt->data[20]) { | |
7f804085 | 622 | av_log(s, AV_LOG_WARNING, "Unexpected reply on connect()\n"); |
9fd6b843 KS |
623 | } else { |
624 | rt->main_channel_id = (int) av_int2dbl(AV_RB64(pkt->data + 21)); | |
625 | } | |
6bf22e18 | 626 | if (rt->is_input) { |
c7240611 | 627 | gen_play(s, rt); |
6bf22e18 S |
628 | } else { |
629 | gen_publish(s, rt); | |
630 | } | |
9fd6b843 KS |
631 | rt->state = STATE_READY; |
632 | break; | |
633 | } | |
634 | } else if (!memcmp(pkt->data, "\002\000\010onStatus", 11)) { | |
635 | const uint8_t* ptr = pkt->data + 11; | |
636 | uint8_t tmpstr[256]; | |
9fd6b843 KS |
637 | |
638 | for (i = 0; i < 2; i++) { | |
639 | t = ff_amf_tag_size(ptr, data_end); | |
640 | if (t < 0) | |
641 | return 1; | |
642 | ptr += t; | |
643 | } | |
644 | t = ff_amf_get_field_value(ptr, data_end, | |
645 | "level", tmpstr, sizeof(tmpstr)); | |
646 | if (!t && !strcmp(tmpstr, "error")) { | |
647 | if (!ff_amf_get_field_value(ptr, data_end, | |
648 | "description", tmpstr, sizeof(tmpstr))) | |
7f804085 | 649 | av_log(s, AV_LOG_ERROR, "Server error: %s\n",tmpstr); |
9fd6b843 KS |
650 | return -1; |
651 | } | |
652 | t = ff_amf_get_field_value(ptr, data_end, | |
653 | "code", tmpstr, sizeof(tmpstr)); | |
6bf22e18 | 654 | if (!t && !strcmp(tmpstr, "NetStream.Play.Start")) rt->state = STATE_PLAYING; |
72b870b9 MS |
655 | if (!t && !strcmp(tmpstr, "NetStream.Play.Stop")) rt->state = STATE_STOPPED; |
656 | if (!t && !strcmp(tmpstr, "NetStream.Play.UnpublishNotify")) rt->state = STATE_STOPPED; | |
6bf22e18 | 657 | if (!t && !strcmp(tmpstr, "NetStream.Publish.Start")) rt->state = STATE_PUBLISHING; |
9fd6b843 KS |
658 | } |
659 | break; | |
660 | } | |
661 | return 0; | |
662 | } | |
663 | ||
664 | /** | |
49bd8e4b | 665 | * Interact with the server by receiving and sending RTMP packets until |
9fd6b843 KS |
666 | * there is some significant data (media data or expected status notification). |
667 | * | |
668 | * @param s reading context | |
1d8041b3 SS |
669 | * @param for_header non-zero value tells function to work until it |
670 | * gets notification from the server that playing has been started, | |
671 | * otherwise function will work until some media data is received (or | |
672 | * an error happens) | |
9fd6b843 KS |
673 | * @return 0 for successful operation, negative value in case of error |
674 | */ | |
675 | static int get_packet(URLContext *s, int for_header) | |
676 | { | |
677 | RTMPContext *rt = s->priv_data; | |
678 | int ret; | |
56e29bf2 S |
679 | uint8_t *p; |
680 | const uint8_t *next; | |
681 | uint32_t data_size; | |
682 | uint32_t ts, cts, pts=0; | |
9fd6b843 | 683 | |
72b870b9 MS |
684 | if (rt->state == STATE_STOPPED) |
685 | return AVERROR_EOF; | |
686 | ||
e07c92e4 | 687 | for (;;) { |
271c869c | 688 | RTMPPacket rpkt = { 0 }; |
9fd6b843 | 689 | if ((ret = ff_rtmp_packet_read(rt->stream, &rpkt, |
adb54961 | 690 | rt->chunk_size, rt->prev_pkt[0])) <= 0) { |
b381a823 | 691 | if (ret == 0) { |
9fd6b843 KS |
692 | return AVERROR(EAGAIN); |
693 | } else { | |
694 | return AVERROR(EIO); | |
695 | } | |
696 | } | |
bf7c1719 KS |
697 | rt->bytes_read += ret; |
698 | if (rt->bytes_read > rt->last_bytes_read + rt->client_report_size) { | |
7f804085 | 699 | av_log(s, AV_LOG_DEBUG, "Sending bytes read report\n"); |
bf7c1719 KS |
700 | gen_bytes_read(s, rt, rpkt.timestamp + 1); |
701 | rt->last_bytes_read = rt->bytes_read; | |
702 | } | |
9fd6b843 KS |
703 | |
704 | ret = rtmp_parse_result(s, rt, &rpkt); | |
705 | if (ret < 0) {//serious error in current packet | |
706 | ff_rtmp_packet_destroy(&rpkt); | |
707 | return -1; | |
708 | } | |
72b870b9 MS |
709 | if (rt->state == STATE_STOPPED) { |
710 | ff_rtmp_packet_destroy(&rpkt); | |
711 | return AVERROR_EOF; | |
712 | } | |
6bf22e18 | 713 | if (for_header && (rt->state == STATE_PLAYING || rt->state == STATE_PUBLISHING)) { |
9fd6b843 KS |
714 | ff_rtmp_packet_destroy(&rpkt); |
715 | return 0; | |
716 | } | |
6bf22e18 | 717 | if (!rpkt.data_size || !rt->is_input) { |
9fd6b843 KS |
718 | ff_rtmp_packet_destroy(&rpkt); |
719 | continue; | |
720 | } | |
721 | if (rpkt.type == RTMP_PT_VIDEO || rpkt.type == RTMP_PT_AUDIO || | |
afbacb93 | 722 | (rpkt.type == RTMP_PT_NOTIFY && !memcmp("\002\000\012onMetaData", rpkt.data, 13))) { |
56e29bf2 | 723 | ts = rpkt.timestamp; |
9fd6b843 | 724 | |
9fd6b843 KS |
725 | // generate packet header and put data into buffer for FLV demuxer |
726 | rt->flv_off = 0; | |
727 | rt->flv_size = rpkt.data_size + 15; | |
728 | rt->flv_data = p = av_realloc(rt->flv_data, rt->flv_size); | |
729 | bytestream_put_byte(&p, rpkt.type); | |
730 | bytestream_put_be24(&p, rpkt.data_size); | |
731 | bytestream_put_be24(&p, ts); | |
732 | bytestream_put_byte(&p, ts >> 24); | |
733 | bytestream_put_be24(&p, 0); | |
734 | bytestream_put_buffer(&p, rpkt.data, rpkt.data_size); | |
735 | bytestream_put_be32(&p, 0); | |
736 | ff_rtmp_packet_destroy(&rpkt); | |
737 | return 0; | |
738 | } else if (rpkt.type == RTMP_PT_METADATA) { | |
739 | // we got raw FLV data, make it available for FLV demuxer | |
740 | rt->flv_off = 0; | |
741 | rt->flv_size = rpkt.data_size; | |
742 | rt->flv_data = av_realloc(rt->flv_data, rt->flv_size); | |
56e29bf2 S |
743 | /* rewrite timestamps */ |
744 | next = rpkt.data; | |
745 | ts = rpkt.timestamp; | |
746 | while (next - rpkt.data < rpkt.data_size - 11) { | |
747 | next++; | |
748 | data_size = bytestream_get_be24(&next); | |
749 | p=next; | |
750 | cts = bytestream_get_be24(&next); | |
aae9a093 | 751 | cts |= bytestream_get_byte(&next) << 24; |
56e29bf2 S |
752 | if (pts==0) |
753 | pts=cts; | |
754 | ts += cts - pts; | |
755 | pts = cts; | |
756 | bytestream_put_be24(&p, ts); | |
757 | bytestream_put_byte(&p, ts >> 24); | |
758 | next += data_size + 3 + 4; | |
759 | } | |
9fd6b843 KS |
760 | memcpy(rt->flv_data, rpkt.data, rpkt.data_size); |
761 | ff_rtmp_packet_destroy(&rpkt); | |
762 | return 0; | |
763 | } | |
764 | ff_rtmp_packet_destroy(&rpkt); | |
765 | } | |
9fd6b843 KS |
766 | } |
767 | ||
768 | static int rtmp_close(URLContext *h) | |
769 | { | |
770 | RTMPContext *rt = h->priv_data; | |
771 | ||
e07c92e4 | 772 | if (!rt->is_input) { |
6bf22e18 S |
773 | rt->flv_data = NULL; |
774 | if (rt->out_pkt.data_size) | |
775 | ff_rtmp_packet_destroy(&rt->out_pkt); | |
615c2879 S |
776 | if (rt->state > STATE_FCPUBLISH) |
777 | gen_fcunpublish_stream(h, rt); | |
6bf22e18 | 778 | } |
615c2879 S |
779 | if (rt->state > STATE_HANDSHAKED) |
780 | gen_delete_stream(h, rt); | |
6bf22e18 | 781 | |
9fd6b843 | 782 | av_freep(&rt->flv_data); |
e52a9145 | 783 | ffurl_close(rt->stream); |
9fd6b843 KS |
784 | av_free(rt); |
785 | return 0; | |
786 | } | |
787 | ||
788 | /** | |
49bd8e4b | 789 | * Open RTMP connection and verify that the stream can be played. |
9fd6b843 KS |
790 | * |
791 | * URL syntax: rtmp://server[:port][/app][/playpath] | |
792 | * where 'app' is first one or two directories in the path | |
793 | * (e.g. /ondemand/, /flash/live/, etc.) | |
794 | * and 'playpath' is a file name (the rest of the path, | |
795 | * may be prefixed with "mp4:") | |
796 | */ | |
797 | static int rtmp_open(URLContext *s, const char *uri, int flags) | |
798 | { | |
799 | RTMPContext *rt; | |
5e9ad759 | 800 | char proto[8], hostname[256], path[1024], *fname; |
9fd6b843 | 801 | uint8_t buf[2048]; |
b316991b | 802 | int port; |
9fd6b843 KS |
803 | int ret; |
804 | ||
9fd6b843 KS |
805 | rt = av_mallocz(sizeof(RTMPContext)); |
806 | if (!rt) | |
807 | return AVERROR(ENOMEM); | |
808 | s->priv_data = rt; | |
59d96941 | 809 | rt->is_input = !(flags & AVIO_FLAG_WRITE); |
9fd6b843 | 810 | |
f3bfe388 | 811 | av_url_split(proto, sizeof(proto), NULL, 0, hostname, sizeof(hostname), &port, |
f984dcf6 | 812 | path, sizeof(path), s->filename); |
9fd6b843 KS |
813 | |
814 | if (port < 0) | |
815 | port = RTMP_DEFAULT_PORT; | |
57b5555c | 816 | ff_url_join(buf, sizeof(buf), "tcp", NULL, hostname, port, NULL); |
9fd6b843 | 817 | |
59d96941 SS |
818 | if (ffurl_open(&rt->stream, buf, AVIO_FLAG_READ_WRITE) < 0) { |
819 | av_log(s , AV_LOG_ERROR, "Cannot open connection %s\n", buf); | |
9fd6b843 | 820 | goto fail; |
fe523958 | 821 | } |
9fd6b843 | 822 | |
c7240611 KS |
823 | rt->state = STATE_START; |
824 | if (rtmp_handshake(s, rt)) | |
825 | return -1; | |
9fd6b843 | 826 | |
c7240611 KS |
827 | rt->chunk_size = 128; |
828 | rt->state = STATE_HANDSHAKED; | |
829 | //extract "app" part from path | |
830 | if (!strncmp(path, "/ondemand/", 10)) { | |
831 | fname = path + 10; | |
832 | memcpy(rt->app, "ondemand", 9); | |
833 | } else { | |
834 | char *p = strchr(path + 1, '/'); | |
835 | if (!p) { | |
836 | fname = path + 1; | |
837 | rt->app[0] = '\0'; | |
9fd6b843 | 838 | } else { |
c7240611 KS |
839 | char *c = strchr(p + 1, ':'); |
840 | fname = strchr(p + 1, '/'); | |
841 | if (!fname || c < fname) { | |
842 | fname = p + 1; | |
843 | av_strlcpy(rt->app, path + 1, p - path); | |
9fd6b843 | 844 | } else { |
c7240611 KS |
845 | fname++; |
846 | av_strlcpy(rt->app, path + 1, fname - path - 1); | |
9fd6b843 KS |
847 | } |
848 | } | |
c7240611 KS |
849 | } |
850 | if (!strchr(fname, ':') && | |
851 | (!strcmp(fname + strlen(fname) - 4, ".f4v") || | |
852 | !strcmp(fname + strlen(fname) - 4, ".mp4"))) { | |
853 | memcpy(rt->playpath, "mp4:", 5); | |
854 | } else { | |
855 | rt->playpath[0] = 0; | |
856 | } | |
857 | strncat(rt->playpath, fname, sizeof(rt->playpath) - 5); | |
9fd6b843 | 858 | |
bf7c1719 KS |
859 | rt->client_report_size = 1048576; |
860 | rt->bytes_read = 0; | |
861 | rt->last_bytes_read = 0; | |
862 | ||
7f804085 | 863 | av_log(s, AV_LOG_DEBUG, "Proto = %s, path = %s, app = %s, fname = %s\n", |
c7240611 KS |
864 | proto, path, rt->app, rt->playpath); |
865 | gen_connect(s, rt, proto, hostname, port); | |
9fd6b843 | 866 | |
c7240611 KS |
867 | do { |
868 | ret = get_packet(s, 1); | |
869 | } while (ret == EAGAIN); | |
870 | if (ret < 0) | |
871 | goto fail; | |
6bf22e18 S |
872 | |
873 | if (rt->is_input) { | |
9fd6b843 KS |
874 | // generate FLV header for demuxer |
875 | rt->flv_size = 13; | |
876 | rt->flv_data = av_realloc(rt->flv_data, rt->flv_size); | |
877 | rt->flv_off = 0; | |
878 | memcpy(rt->flv_data, "FLV\1\5\0\0\0\011\0\0\0\0", rt->flv_size); | |
6bf22e18 S |
879 | } else { |
880 | rt->flv_size = 0; | |
881 | rt->flv_data = NULL; | |
882 | rt->flv_off = 0; | |
9fd6b843 KS |
883 | } |
884 | ||
5958df34 | 885 | s->max_packet_size = rt->stream->max_packet_size; |
9fd6b843 KS |
886 | s->is_streamed = 1; |
887 | return 0; | |
888 | ||
889 | fail: | |
890 | rtmp_close(s); | |
891 | return AVERROR(EIO); | |
892 | } | |
893 | ||
894 | static int rtmp_read(URLContext *s, uint8_t *buf, int size) | |
895 | { | |
896 | RTMPContext *rt = s->priv_data; | |
897 | int orig_size = size; | |
898 | int ret; | |
899 | ||
900 | while (size > 0) { | |
901 | int data_left = rt->flv_size - rt->flv_off; | |
902 | ||
903 | if (data_left >= size) { | |
904 | memcpy(buf, rt->flv_data + rt->flv_off, size); | |
905 | rt->flv_off += size; | |
906 | return orig_size; | |
907 | } | |
908 | if (data_left > 0) { | |
909 | memcpy(buf, rt->flv_data + rt->flv_off, data_left); | |
910 | buf += data_left; | |
911 | size -= data_left; | |
912 | rt->flv_off = rt->flv_size; | |
e8ccf245 | 913 | return data_left; |
9fd6b843 KS |
914 | } |
915 | if ((ret = get_packet(s, 0)) < 0) | |
916 | return ret; | |
917 | } | |
918 | return orig_size; | |
919 | } | |
920 | ||
9ad4c65f | 921 | static int rtmp_write(URLContext *s, const uint8_t *buf, int size) |
9fd6b843 | 922 | { |
9ad4c65f | 923 | RTMPContext *rt = s->priv_data; |
6bf22e18 S |
924 | int size_temp = size; |
925 | int pktsize, pkttype; | |
926 | uint32_t ts; | |
927 | const uint8_t *buf_temp = buf; | |
928 | ||
3ffe32eb MS |
929 | if (rt->skip_bytes) { |
930 | int skip = FFMIN(rt->skip_bytes, size); | |
931 | buf_temp += skip; | |
932 | size_temp -= skip; | |
933 | rt->skip_bytes -= skip; | |
934 | if (size_temp <= 0) | |
935 | return size; | |
936 | } | |
937 | ||
938 | if (!rt->flv_off && size_temp < 11) { | |
7f804085 | 939 | av_log(s, AV_LOG_DEBUG, "FLV packet too small %d\n", size); |
6bf22e18 S |
940 | return 0; |
941 | } | |
942 | ||
943 | do { | |
944 | if (!rt->flv_off) { | |
945 | //skip flv header | |
946 | if (buf_temp[0] == 'F' && buf_temp[1] == 'L' && buf_temp[2] == 'V') { | |
947 | buf_temp += 9 + 4; | |
948 | size_temp -= 9 + 4; | |
949 | } | |
950 | ||
951 | pkttype = bytestream_get_byte(&buf_temp); | |
952 | pktsize = bytestream_get_be24(&buf_temp); | |
953 | ts = bytestream_get_be24(&buf_temp); | |
954 | ts |= bytestream_get_byte(&buf_temp) << 24; | |
955 | bytestream_get_be24(&buf_temp); | |
956 | size_temp -= 11; | |
957 | rt->flv_size = pktsize; | |
958 | ||
959 | //force 12bytes header | |
960 | if (((pkttype == RTMP_PT_VIDEO || pkttype == RTMP_PT_AUDIO) && ts == 0) || | |
961 | pkttype == RTMP_PT_NOTIFY) { | |
962 | if (pkttype == RTMP_PT_NOTIFY) | |
963 | pktsize += 16; | |
964 | rt->prev_pkt[1][RTMP_SOURCE_CHANNEL].channel_id = 0; | |
965 | } | |
966 | ||
967 | //this can be a big packet, it's better to send it right here | |
968 | ff_rtmp_packet_create(&rt->out_pkt, RTMP_SOURCE_CHANNEL, pkttype, ts, pktsize); | |
969 | rt->out_pkt.extra = rt->main_channel_id; | |
970 | rt->flv_data = rt->out_pkt.data; | |
971 | ||
972 | if (pkttype == RTMP_PT_NOTIFY) | |
973 | ff_amf_write_string(&rt->flv_data, "@setDataFrame"); | |
974 | } | |
975 | ||
976 | if (rt->flv_size - rt->flv_off > size_temp) { | |
977 | bytestream_get_buffer(&buf_temp, rt->flv_data + rt->flv_off, size_temp); | |
978 | rt->flv_off += size_temp; | |
a14c7842 | 979 | size_temp = 0; |
6bf22e18 S |
980 | } else { |
981 | bytestream_get_buffer(&buf_temp, rt->flv_data + rt->flv_off, rt->flv_size - rt->flv_off); | |
a14c7842 | 982 | size_temp -= rt->flv_size - rt->flv_off; |
6bf22e18 S |
983 | rt->flv_off += rt->flv_size - rt->flv_off; |
984 | } | |
985 | ||
986 | if (rt->flv_off == rt->flv_size) { | |
3ffe32eb MS |
987 | if (size_temp < 4) { |
988 | rt->skip_bytes = 4 - size_temp; | |
989 | buf_temp += size_temp; | |
990 | size_temp = 0; | |
991 | } else { | |
992 | bytestream_get_be32(&buf_temp); | |
993 | size_temp -= 4; | |
994 | } | |
6bf22e18 S |
995 | ff_rtmp_packet_write(rt->stream, &rt->out_pkt, rt->chunk_size, rt->prev_pkt[1]); |
996 | ff_rtmp_packet_destroy(&rt->out_pkt); | |
997 | rt->flv_size = 0; | |
998 | rt->flv_off = 0; | |
999 | } | |
a14c7842 | 1000 | } while (buf_temp - buf < size); |
6bf22e18 | 1001 | return size; |
9fd6b843 KS |
1002 | } |
1003 | ||
c6610a21 | 1004 | URLProtocol ff_rtmp_protocol = { |
f35ff97f AK |
1005 | .name = "rtmp", |
1006 | .url_open = rtmp_open, | |
1007 | .url_read = rtmp_read, | |
1008 | .url_write = rtmp_write, | |
1009 | .url_close = rtmp_close, | |
9fd6b843 | 1010 | }; |