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" | |
29 | #include "libavutil/lfg.h" | |
30 | #include "libavutil/sha.h" | |
31 | #include "avformat.h" | |
e4a9e3cc | 32 | #include "internal.h" |
9fd6b843 KS |
33 | |
34 | #include "network.h" | |
35 | ||
36 | #include "flv.h" | |
37 | #include "rtmp.h" | |
38 | #include "rtmppkt.h" | |
0589da0a | 39 | #include "url.h" |
9fd6b843 KS |
40 | |
41 | /* we can't use av_log() with URLContext yet... */ | |
ade800c5 | 42 | #if FF_API_URL_CLASS |
9fd6b843 | 43 | #define LOG_CONTEXT s |
ade800c5 AJ |
44 | #else |
45 | #define LOG_CONTEXT NULL | |
9fd6b843 KS |
46 | #endif |
47 | ||
cfac91fe KS |
48 | //#define DEBUG |
49 | ||
9fd6b843 KS |
50 | /** RTMP protocol handler state */ |
51 | typedef enum { | |
52 | STATE_START, ///< client has not done anything yet | |
53 | STATE_HANDSHAKED, ///< client has performed handshake | |
6bf22e18 S |
54 | STATE_RELEASING, ///< client releasing stream before publish it (for output) |
55 | STATE_FCPUBLISH, ///< client FCPublishing stream (for output) | |
9fd6b843 KS |
56 | STATE_CONNECTING, ///< client connected to server successfully |
57 | STATE_READY, ///< client has sent all needed commands and waits for server reply | |
58 | STATE_PLAYING, ///< client has started receiving multimedia data from server | |
6bf22e18 | 59 | STATE_PUBLISHING, ///< client has started sending multimedia data to server (for output) |
72b870b9 | 60 | STATE_STOPPED, ///< the broadcast has been stopped |
9fd6b843 KS |
61 | } ClientState; |
62 | ||
63 | /** protocol handler context */ | |
64 | typedef struct RTMPContext { | |
65 | URLContext* stream; ///< TCP stream used in interactions with RTMP server | |
66 | RTMPPacket prev_pkt[2][RTMP_CHANNELS]; ///< packet history used when reading and sending packets | |
67 | int chunk_size; ///< size of the chunks RTMP packets are divided into | |
b316991b | 68 | int is_input; ///< input/output flag |
9fd6b843 | 69 | char playpath[256]; ///< path to filename to play (with possible "mp4:" prefix) |
5e9ad759 | 70 | char app[128]; ///< application |
9fd6b843 KS |
71 | ClientState state; ///< current state |
72 | int main_channel_id; ///< an additional channel ID which is used for some invocations | |
73 | uint8_t* flv_data; ///< buffer with data for demuxer | |
74 | int flv_size; ///< current buffer size | |
75 | int flv_off; ///< number of bytes read from current buffer | |
6bf22e18 | 76 | RTMPPacket out_pkt; ///< rtmp packet, created from flv a/v or metadata (for output) |
bf7c1719 KS |
77 | uint32_t client_report_size; ///< number of bytes after which client should report to server |
78 | uint32_t bytes_read; ///< number of bytes read from server | |
79 | uint32_t last_bytes_read; ///< number of bytes read last reported to server | |
9fd6b843 KS |
80 | } RTMPContext; |
81 | ||
82 | #define PLAYER_KEY_OPEN_PART_LEN 30 ///< length of partial key used for first client digest signing | |
83 | /** Client key used for digest signing */ | |
84 | static const uint8_t rtmp_player_key[] = { | |
85 | 'G', 'e', 'n', 'u', 'i', 'n', 'e', ' ', 'A', 'd', 'o', 'b', 'e', ' ', | |
86 | 'F', 'l', 'a', 's', 'h', ' ', 'P', 'l', 'a', 'y', 'e', 'r', ' ', '0', '0', '1', | |
87 | ||
88 | 0xF0, 0xEE, 0xC2, 0x4A, 0x80, 0x68, 0xBE, 0xE8, 0x2E, 0x00, 0xD0, 0xD1, 0x02, | |
89 | 0x9E, 0x7E, 0x57, 0x6E, 0xEC, 0x5D, 0x2D, 0x29, 0x80, 0x6F, 0xAB, 0x93, 0xB8, | |
90 | 0xE6, 0x36, 0xCF, 0xEB, 0x31, 0xAE | |
91 | }; | |
92 | ||
93 | #define SERVER_KEY_OPEN_PART_LEN 36 ///< length of partial key used for first server digest signing | |
94 | /** Key used for RTMP server digest signing */ | |
95 | static const uint8_t rtmp_server_key[] = { | |
96 | 'G', 'e', 'n', 'u', 'i', 'n', 'e', ' ', 'A', 'd', 'o', 'b', 'e', ' ', | |
97 | 'F', 'l', 'a', 's', 'h', ' ', 'M', 'e', 'd', 'i', 'a', ' ', | |
98 | 'S', 'e', 'r', 'v', 'e', 'r', ' ', '0', '0', '1', | |
99 | ||
100 | 0xF0, 0xEE, 0xC2, 0x4A, 0x80, 0x68, 0xBE, 0xE8, 0x2E, 0x00, 0xD0, 0xD1, 0x02, | |
101 | 0x9E, 0x7E, 0x57, 0x6E, 0xEC, 0x5D, 0x2D, 0x29, 0x80, 0x6F, 0xAB, 0x93, 0xB8, | |
102 | 0xE6, 0x36, 0xCF, 0xEB, 0x31, 0xAE | |
103 | }; | |
104 | ||
105 | /** | |
49bd8e4b | 106 | * Generate 'connect' call and send it to the server. |
9fd6b843 KS |
107 | */ |
108 | static void gen_connect(URLContext *s, RTMPContext *rt, const char *proto, | |
5e9ad759 | 109 | const char *host, int port) |
9fd6b843 KS |
110 | { |
111 | RTMPPacket pkt; | |
6bf22e18 | 112 | uint8_t ver[64], *p; |
9fd6b843 KS |
113 | char tcurl[512]; |
114 | ||
31da5966 | 115 | ff_rtmp_packet_create(&pkt, RTMP_SYSTEM_CHANNEL, RTMP_PT_INVOKE, 0, 4096); |
9fd6b843 KS |
116 | p = pkt.data; |
117 | ||
57b5555c | 118 | ff_url_join(tcurl, sizeof(tcurl), proto, NULL, host, port, "/%s", rt->app); |
9fd6b843 KS |
119 | ff_amf_write_string(&p, "connect"); |
120 | ff_amf_write_number(&p, 1.0); | |
121 | ff_amf_write_object_start(&p); | |
122 | ff_amf_write_field_name(&p, "app"); | |
5e9ad759 | 123 | ff_amf_write_string(&p, rt->app); |
9fd6b843 | 124 | |
6bf22e18 | 125 | if (rt->is_input) { |
c7240611 KS |
126 | snprintf(ver, sizeof(ver), "%s %d,%d,%d,%d", RTMP_CLIENT_PLATFORM, RTMP_CLIENT_VER1, |
127 | RTMP_CLIENT_VER2, RTMP_CLIENT_VER3, RTMP_CLIENT_VER4); | |
6bf22e18 S |
128 | } else { |
129 | snprintf(ver, sizeof(ver), "FMLE/3.0 (compatible; %s)", LIBAVFORMAT_IDENT); | |
130 | ff_amf_write_field_name(&p, "type"); | |
131 | ff_amf_write_string(&p, "nonprivate"); | |
132 | } | |
9fd6b843 KS |
133 | ff_amf_write_field_name(&p, "flashVer"); |
134 | ff_amf_write_string(&p, ver); | |
135 | ff_amf_write_field_name(&p, "tcUrl"); | |
136 | ff_amf_write_string(&p, tcurl); | |
6bf22e18 | 137 | if (rt->is_input) { |
c7240611 KS |
138 | ff_amf_write_field_name(&p, "fpad"); |
139 | ff_amf_write_bool(&p, 0); | |
140 | ff_amf_write_field_name(&p, "capabilities"); | |
141 | ff_amf_write_number(&p, 15.0); | |
142 | ff_amf_write_field_name(&p, "audioCodecs"); | |
143 | ff_amf_write_number(&p, 1639.0); | |
144 | ff_amf_write_field_name(&p, "videoCodecs"); | |
145 | ff_amf_write_number(&p, 252.0); | |
146 | ff_amf_write_field_name(&p, "videoFunction"); | |
147 | ff_amf_write_number(&p, 1.0); | |
6bf22e18 | 148 | } |
9fd6b843 KS |
149 | ff_amf_write_object_end(&p); |
150 | ||
151 | pkt.data_size = p - pkt.data; | |
152 | ||
153 | ff_rtmp_packet_write(rt->stream, &pkt, rt->chunk_size, rt->prev_pkt[1]); | |
f8caa544 | 154 | ff_rtmp_packet_destroy(&pkt); |
9fd6b843 KS |
155 | } |
156 | ||
157 | /** | |
49bd8e4b | 158 | * Generate 'releaseStream' call and send it to the server. It should make |
6bf22e18 S |
159 | * the server release some channel for media streams. |
160 | */ | |
161 | static void gen_release_stream(URLContext *s, RTMPContext *rt) | |
162 | { | |
163 | RTMPPacket pkt; | |
164 | uint8_t *p; | |
165 | ||
166 | ff_rtmp_packet_create(&pkt, RTMP_SYSTEM_CHANNEL, RTMP_PT_INVOKE, 0, | |
167 | 29 + strlen(rt->playpath)); | |
168 | ||
169 | av_log(LOG_CONTEXT, AV_LOG_DEBUG, "Releasing stream...\n"); | |
170 | p = pkt.data; | |
171 | ff_amf_write_string(&p, "releaseStream"); | |
172 | ff_amf_write_number(&p, 2.0); | |
173 | ff_amf_write_null(&p); | |
174 | ff_amf_write_string(&p, rt->playpath); | |
175 | ||
176 | ff_rtmp_packet_write(rt->stream, &pkt, rt->chunk_size, rt->prev_pkt[1]); | |
177 | ff_rtmp_packet_destroy(&pkt); | |
178 | } | |
179 | ||
180 | /** | |
49bd8e4b | 181 | * Generate 'FCPublish' call and send it to the server. It should make |
6bf22e18 S |
182 | * the server preapare for receiving media streams. |
183 | */ | |
184 | static void gen_fcpublish_stream(URLContext *s, RTMPContext *rt) | |
185 | { | |
186 | RTMPPacket pkt; | |
187 | uint8_t *p; | |
188 | ||
189 | ff_rtmp_packet_create(&pkt, RTMP_SYSTEM_CHANNEL, RTMP_PT_INVOKE, 0, | |
190 | 25 + strlen(rt->playpath)); | |
191 | ||
192 | av_log(LOG_CONTEXT, AV_LOG_DEBUG, "FCPublish stream...\n"); | |
193 | p = pkt.data; | |
194 | ff_amf_write_string(&p, "FCPublish"); | |
195 | ff_amf_write_number(&p, 3.0); | |
196 | ff_amf_write_null(&p); | |
197 | ff_amf_write_string(&p, rt->playpath); | |
198 | ||
199 | ff_rtmp_packet_write(rt->stream, &pkt, rt->chunk_size, rt->prev_pkt[1]); | |
200 | ff_rtmp_packet_destroy(&pkt); | |
201 | } | |
202 | ||
203 | /** | |
49bd8e4b | 204 | * Generate 'FCUnpublish' call and send it to the server. It should make |
6bf22e18 S |
205 | * the server destroy stream. |
206 | */ | |
207 | static void gen_fcunpublish_stream(URLContext *s, RTMPContext *rt) | |
208 | { | |
209 | RTMPPacket pkt; | |
210 | uint8_t *p; | |
211 | ||
212 | ff_rtmp_packet_create(&pkt, RTMP_SYSTEM_CHANNEL, RTMP_PT_INVOKE, 0, | |
213 | 27 + strlen(rt->playpath)); | |
214 | ||
215 | av_log(LOG_CONTEXT, AV_LOG_DEBUG, "UnPublishing stream...\n"); | |
216 | p = pkt.data; | |
217 | ff_amf_write_string(&p, "FCUnpublish"); | |
218 | ff_amf_write_number(&p, 5.0); | |
219 | ff_amf_write_null(&p); | |
220 | ff_amf_write_string(&p, rt->playpath); | |
221 | ||
222 | ff_rtmp_packet_write(rt->stream, &pkt, rt->chunk_size, rt->prev_pkt[1]); | |
223 | ff_rtmp_packet_destroy(&pkt); | |
224 | } | |
225 | ||
226 | /** | |
49bd8e4b | 227 | * Generate 'createStream' call and send it to the server. It should make |
9fd6b843 KS |
228 | * the server allocate some channel for media streams. |
229 | */ | |
230 | static void gen_create_stream(URLContext *s, RTMPContext *rt) | |
231 | { | |
232 | RTMPPacket pkt; | |
233 | uint8_t *p; | |
234 | ||
235 | av_log(LOG_CONTEXT, AV_LOG_DEBUG, "Creating stream...\n"); | |
31da5966 | 236 | ff_rtmp_packet_create(&pkt, RTMP_SYSTEM_CHANNEL, RTMP_PT_INVOKE, 0, 25); |
9fd6b843 KS |
237 | |
238 | p = pkt.data; | |
239 | ff_amf_write_string(&p, "createStream"); | |
6bf22e18 S |
240 | ff_amf_write_number(&p, rt->is_input ? 3.0 : 4.0); |
241 | ff_amf_write_null(&p); | |
242 | ||
243 | ff_rtmp_packet_write(rt->stream, &pkt, rt->chunk_size, rt->prev_pkt[1]); | |
244 | ff_rtmp_packet_destroy(&pkt); | |
245 | } | |
246 | ||
247 | ||
248 | /** | |
49bd8e4b | 249 | * Generate 'deleteStream' call and send it to the server. It should make |
6bf22e18 S |
250 | * the server remove some channel for media streams. |
251 | */ | |
252 | static void gen_delete_stream(URLContext *s, RTMPContext *rt) | |
253 | { | |
254 | RTMPPacket pkt; | |
255 | uint8_t *p; | |
256 | ||
257 | av_log(LOG_CONTEXT, AV_LOG_DEBUG, "Deleting stream...\n"); | |
258 | ff_rtmp_packet_create(&pkt, RTMP_SYSTEM_CHANNEL, RTMP_PT_INVOKE, 0, 34); | |
259 | ||
260 | p = pkt.data; | |
261 | ff_amf_write_string(&p, "deleteStream"); | |
262 | ff_amf_write_number(&p, 0.0); | |
9fd6b843 | 263 | ff_amf_write_null(&p); |
6bf22e18 | 264 | ff_amf_write_number(&p, rt->main_channel_id); |
9fd6b843 KS |
265 | |
266 | ff_rtmp_packet_write(rt->stream, &pkt, rt->chunk_size, rt->prev_pkt[1]); | |
267 | ff_rtmp_packet_destroy(&pkt); | |
268 | } | |
269 | ||
270 | /** | |
49bd8e4b | 271 | * Generate 'play' call and send it to the server, then ping the server |
9fd6b843 KS |
272 | * to start actual playing. |
273 | */ | |
274 | static void gen_play(URLContext *s, RTMPContext *rt) | |
275 | { | |
276 | RTMPPacket pkt; | |
277 | uint8_t *p; | |
278 | ||
279 | av_log(LOG_CONTEXT, AV_LOG_DEBUG, "Sending play command for '%s'\n", rt->playpath); | |
280 | ff_rtmp_packet_create(&pkt, RTMP_VIDEO_CHANNEL, RTMP_PT_INVOKE, 0, | |
f836fa17 | 281 | 20 + strlen(rt->playpath)); |
9fd6b843 KS |
282 | pkt.extra = rt->main_channel_id; |
283 | ||
284 | p = pkt.data; | |
285 | ff_amf_write_string(&p, "play"); | |
286 | ff_amf_write_number(&p, 0.0); | |
287 | ff_amf_write_null(&p); | |
288 | ff_amf_write_string(&p, rt->playpath); | |
9fd6b843 KS |
289 | |
290 | ff_rtmp_packet_write(rt->stream, &pkt, rt->chunk_size, rt->prev_pkt[1]); | |
291 | ff_rtmp_packet_destroy(&pkt); | |
292 | ||
293 | // set client buffer time disguised in ping packet | |
294 | ff_rtmp_packet_create(&pkt, RTMP_NETWORK_CHANNEL, RTMP_PT_PING, 1, 10); | |
295 | ||
296 | p = pkt.data; | |
297 | bytestream_put_be16(&p, 3); | |
298 | bytestream_put_be32(&p, 1); | |
299 | bytestream_put_be32(&p, 256); //TODO: what is a good value here? | |
300 | ||
301 | ff_rtmp_packet_write(rt->stream, &pkt, rt->chunk_size, rt->prev_pkt[1]); | |
302 | ff_rtmp_packet_destroy(&pkt); | |
303 | } | |
304 | ||
305 | /** | |
49bd8e4b | 306 | * Generate 'publish' call and send it to the server. |
6bf22e18 S |
307 | */ |
308 | static void gen_publish(URLContext *s, RTMPContext *rt) | |
309 | { | |
310 | RTMPPacket pkt; | |
311 | uint8_t *p; | |
312 | ||
313 | av_log(LOG_CONTEXT, AV_LOG_DEBUG, "Sending publish command for '%s'\n", rt->playpath); | |
314 | ff_rtmp_packet_create(&pkt, RTMP_SOURCE_CHANNEL, RTMP_PT_INVOKE, 0, | |
315 | 30 + strlen(rt->playpath)); | |
316 | pkt.extra = rt->main_channel_id; | |
317 | ||
318 | p = pkt.data; | |
319 | ff_amf_write_string(&p, "publish"); | |
320 | ff_amf_write_number(&p, 0.0); | |
321 | ff_amf_write_null(&p); | |
322 | ff_amf_write_string(&p, rt->playpath); | |
323 | ff_amf_write_string(&p, "live"); | |
324 | ||
325 | ff_rtmp_packet_write(rt->stream, &pkt, rt->chunk_size, rt->prev_pkt[1]); | |
326 | ff_rtmp_packet_destroy(&pkt); | |
327 | } | |
328 | ||
329 | /** | |
49bd8e4b | 330 | * Generate ping reply and send it to the server. |
9fd6b843 KS |
331 | */ |
332 | static void gen_pong(URLContext *s, RTMPContext *rt, RTMPPacket *ppkt) | |
333 | { | |
334 | RTMPPacket pkt; | |
335 | uint8_t *p; | |
336 | ||
337 | ff_rtmp_packet_create(&pkt, RTMP_NETWORK_CHANNEL, RTMP_PT_PING, ppkt->timestamp + 1, 6); | |
338 | p = pkt.data; | |
339 | bytestream_put_be16(&p, 7); | |
4aaebf78 | 340 | bytestream_put_be32(&p, AV_RB32(ppkt->data+2)); |
9fd6b843 KS |
341 | ff_rtmp_packet_write(rt->stream, &pkt, rt->chunk_size, rt->prev_pkt[1]); |
342 | ff_rtmp_packet_destroy(&pkt); | |
343 | } | |
344 | ||
bf7c1719 | 345 | /** |
49bd8e4b | 346 | * Generate report on bytes read so far and send it to the server. |
bf7c1719 KS |
347 | */ |
348 | static void gen_bytes_read(URLContext *s, RTMPContext *rt, uint32_t ts) | |
349 | { | |
350 | RTMPPacket pkt; | |
351 | uint8_t *p; | |
352 | ||
353 | ff_rtmp_packet_create(&pkt, RTMP_NETWORK_CHANNEL, RTMP_PT_BYTES_READ, ts, 4); | |
354 | p = pkt.data; | |
355 | bytestream_put_be32(&p, rt->bytes_read); | |
356 | ff_rtmp_packet_write(rt->stream, &pkt, rt->chunk_size, rt->prev_pkt[1]); | |
357 | ff_rtmp_packet_destroy(&pkt); | |
358 | } | |
359 | ||
9fd6b843 KS |
360 | //TODO: Move HMAC code somewhere. Eventually. |
361 | #define HMAC_IPAD_VAL 0x36 | |
362 | #define HMAC_OPAD_VAL 0x5C | |
363 | ||
364 | /** | |
49bd8e4b | 365 | * Calculate HMAC-SHA2 digest for RTMP handshake packets. |
9fd6b843 KS |
366 | * |
367 | * @param src input buffer | |
368 | * @param len input buffer length (should be 1536) | |
369 | * @param gap offset in buffer where 32 bytes should not be taken into account | |
370 | * when calculating digest (since it will be used to store that digest) | |
371 | * @param key digest key | |
372 | * @param keylen digest key length | |
373 | * @param dst buffer where calculated digest will be stored (32 bytes) | |
374 | */ | |
375 | static void rtmp_calc_digest(const uint8_t *src, int len, int gap, | |
376 | const uint8_t *key, int keylen, uint8_t *dst) | |
377 | { | |
378 | struct AVSHA *sha; | |
379 | uint8_t hmac_buf[64+32] = {0}; | |
380 | int i; | |
381 | ||
382 | sha = av_mallocz(av_sha_size); | |
383 | ||
384 | if (keylen < 64) { | |
385 | memcpy(hmac_buf, key, keylen); | |
386 | } else { | |
387 | av_sha_init(sha, 256); | |
388 | av_sha_update(sha,key, keylen); | |
389 | av_sha_final(sha, hmac_buf); | |
390 | } | |
391 | for (i = 0; i < 64; i++) | |
392 | hmac_buf[i] ^= HMAC_IPAD_VAL; | |
393 | ||
394 | av_sha_init(sha, 256); | |
395 | av_sha_update(sha, hmac_buf, 64); | |
396 | if (gap <= 0) { | |
397 | av_sha_update(sha, src, len); | |
398 | } else { //skip 32 bytes used for storing digest | |
399 | av_sha_update(sha, src, gap); | |
400 | av_sha_update(sha, src + gap + 32, len - gap - 32); | |
401 | } | |
402 | av_sha_final(sha, hmac_buf + 64); | |
403 | ||
404 | for (i = 0; i < 64; i++) | |
405 | hmac_buf[i] ^= HMAC_IPAD_VAL ^ HMAC_OPAD_VAL; //reuse XORed key for opad | |
406 | av_sha_init(sha, 256); | |
407 | av_sha_update(sha, hmac_buf, 64+32); | |
408 | av_sha_final(sha, dst); | |
409 | ||
410 | av_free(sha); | |
411 | } | |
412 | ||
413 | /** | |
49bd8e4b | 414 | * Put HMAC-SHA2 digest of packet data (except for the bytes where this digest |
9fd6b843 KS |
415 | * will be stored) into that packet. |
416 | * | |
417 | * @param buf handshake data (1536 bytes) | |
418 | * @return offset to the digest inside input data | |
419 | */ | |
420 | static int rtmp_handshake_imprint_with_digest(uint8_t *buf) | |
421 | { | |
422 | int i, digest_pos = 0; | |
423 | ||
424 | for (i = 8; i < 12; i++) | |
425 | digest_pos += buf[i]; | |
426 | digest_pos = (digest_pos % 728) + 12; | |
427 | ||
428 | rtmp_calc_digest(buf, RTMP_HANDSHAKE_PACKET_SIZE, digest_pos, | |
429 | rtmp_player_key, PLAYER_KEY_OPEN_PART_LEN, | |
430 | buf + digest_pos); | |
431 | return digest_pos; | |
432 | } | |
433 | ||
434 | /** | |
49bd8e4b | 435 | * Verify that the received server response has the expected digest value. |
9fd6b843 KS |
436 | * |
437 | * @param buf handshake data received from the server (1536 bytes) | |
438 | * @param off position to search digest offset from | |
439 | * @return 0 if digest is valid, digest position otherwise | |
440 | */ | |
441 | static int rtmp_validate_digest(uint8_t *buf, int off) | |
442 | { | |
443 | int i, digest_pos = 0; | |
444 | uint8_t digest[32]; | |
445 | ||
446 | for (i = 0; i < 4; i++) | |
447 | digest_pos += buf[i + off]; | |
448 | digest_pos = (digest_pos % 728) + off + 4; | |
449 | ||
450 | rtmp_calc_digest(buf, RTMP_HANDSHAKE_PACKET_SIZE, digest_pos, | |
451 | rtmp_server_key, SERVER_KEY_OPEN_PART_LEN, | |
452 | digest); | |
453 | if (!memcmp(digest, buf + digest_pos, 32)) | |
454 | return digest_pos; | |
455 | return 0; | |
456 | } | |
457 | ||
458 | /** | |
49bd8e4b | 459 | * Perform handshake with the server by means of exchanging pseudorandom data |
9fd6b843 KS |
460 | * signed with HMAC-SHA2 digest. |
461 | * | |
462 | * @return 0 if handshake succeeds, negative value otherwise | |
463 | */ | |
464 | static int rtmp_handshake(URLContext *s, RTMPContext *rt) | |
465 | { | |
466 | AVLFG rnd; | |
467 | uint8_t tosend [RTMP_HANDSHAKE_PACKET_SIZE+1] = { | |
468 | 3, // unencrypted data | |
469 | 0, 0, 0, 0, // client uptime | |
470 | RTMP_CLIENT_VER1, | |
471 | RTMP_CLIENT_VER2, | |
472 | RTMP_CLIENT_VER3, | |
473 | RTMP_CLIENT_VER4, | |
474 | }; | |
475 | uint8_t clientdata[RTMP_HANDSHAKE_PACKET_SIZE]; | |
476 | uint8_t serverdata[RTMP_HANDSHAKE_PACKET_SIZE+1]; | |
477 | int i; | |
478 | int server_pos, client_pos; | |
479 | uint8_t digest[32]; | |
480 | ||
481 | av_log(LOG_CONTEXT, AV_LOG_DEBUG, "Handshaking...\n"); | |
482 | ||
483 | av_lfg_init(&rnd, 0xDEADC0DE); | |
484 | // generate handshake packet - 1536 bytes of pseudorandom data | |
485 | for (i = 9; i <= RTMP_HANDSHAKE_PACKET_SIZE; i++) | |
486 | tosend[i] = av_lfg_get(&rnd) >> 24; | |
487 | client_pos = rtmp_handshake_imprint_with_digest(tosend + 1); | |
488 | ||
925e908b | 489 | ffurl_write(rt->stream, tosend, RTMP_HANDSHAKE_PACKET_SIZE + 1); |
dce37564 | 490 | i = ffurl_read_complete(rt->stream, serverdata, RTMP_HANDSHAKE_PACKET_SIZE + 1); |
9fd6b843 KS |
491 | if (i != RTMP_HANDSHAKE_PACKET_SIZE + 1) { |
492 | av_log(LOG_CONTEXT, AV_LOG_ERROR, "Cannot read RTMP handshake response\n"); | |
493 | return -1; | |
494 | } | |
dce37564 | 495 | i = ffurl_read_complete(rt->stream, clientdata, RTMP_HANDSHAKE_PACKET_SIZE); |
9fd6b843 KS |
496 | if (i != RTMP_HANDSHAKE_PACKET_SIZE) { |
497 | av_log(LOG_CONTEXT, AV_LOG_ERROR, "Cannot read RTMP handshake response\n"); | |
498 | return -1; | |
499 | } | |
500 | ||
501 | av_log(LOG_CONTEXT, AV_LOG_DEBUG, "Server version %d.%d.%d.%d\n", | |
502 | serverdata[5], serverdata[6], serverdata[7], serverdata[8]); | |
503 | ||
e2ee11e8 | 504 | if (rt->is_input && serverdata[5] >= 3) { |
c7240611 | 505 | server_pos = rtmp_validate_digest(serverdata + 1, 772); |
9fd6b843 | 506 | if (!server_pos) { |
c7240611 KS |
507 | server_pos = rtmp_validate_digest(serverdata + 1, 8); |
508 | if (!server_pos) { | |
509 | av_log(LOG_CONTEXT, AV_LOG_ERROR, "Server response validating failed\n"); | |
510 | return -1; | |
511 | } | |
9fd6b843 | 512 | } |
9fd6b843 | 513 | |
c7240611 KS |
514 | rtmp_calc_digest(tosend + 1 + client_pos, 32, 0, |
515 | rtmp_server_key, sizeof(rtmp_server_key), | |
516 | digest); | |
517 | rtmp_calc_digest(clientdata, RTMP_HANDSHAKE_PACKET_SIZE-32, 0, | |
518 | digest, 32, | |
519 | digest); | |
520 | if (memcmp(digest, clientdata + RTMP_HANDSHAKE_PACKET_SIZE - 32, 32)) { | |
521 | av_log(LOG_CONTEXT, AV_LOG_ERROR, "Signature mismatch\n"); | |
522 | return -1; | |
523 | } | |
9fd6b843 | 524 | |
c7240611 KS |
525 | for (i = 0; i < RTMP_HANDSHAKE_PACKET_SIZE; i++) |
526 | tosend[i] = av_lfg_get(&rnd) >> 24; | |
527 | rtmp_calc_digest(serverdata + 1 + server_pos, 32, 0, | |
528 | rtmp_player_key, sizeof(rtmp_player_key), | |
529 | digest); | |
530 | rtmp_calc_digest(tosend, RTMP_HANDSHAKE_PACKET_SIZE - 32, 0, | |
531 | digest, 32, | |
532 | tosend + RTMP_HANDSHAKE_PACKET_SIZE - 32); | |
533 | ||
534 | // write reply back to the server | |
925e908b | 535 | ffurl_write(rt->stream, tosend, RTMP_HANDSHAKE_PACKET_SIZE); |
6bf22e18 | 536 | } else { |
925e908b | 537 | ffurl_write(rt->stream, serverdata+1, RTMP_HANDSHAKE_PACKET_SIZE); |
6bf22e18 S |
538 | } |
539 | ||
9fd6b843 KS |
540 | return 0; |
541 | } | |
542 | ||
543 | /** | |
49bd8e4b | 544 | * Parse received packet and possibly perform some action depending on |
9fd6b843 KS |
545 | * the packet contents. |
546 | * @return 0 for no errors, negative values for serious errors which prevent | |
547 | * further communications, positive values for uncritical errors | |
548 | */ | |
549 | static int rtmp_parse_result(URLContext *s, RTMPContext *rt, RTMPPacket *pkt) | |
550 | { | |
551 | int i, t; | |
552 | const uint8_t *data_end = pkt->data + pkt->data_size; | |
553 | ||
cfac91fe KS |
554 | #ifdef DEBUG |
555 | ff_rtmp_packet_dump(LOG_CONTEXT, pkt); | |
556 | #endif | |
557 | ||
9fd6b843 KS |
558 | switch (pkt->type) { |
559 | case RTMP_PT_CHUNK_SIZE: | |
560 | if (pkt->data_size != 4) { | |
561 | av_log(LOG_CONTEXT, AV_LOG_ERROR, | |
562 | "Chunk size change packet is not 4 bytes long (%d)\n", pkt->data_size); | |
563 | return -1; | |
564 | } | |
6bf22e18 S |
565 | if (!rt->is_input) |
566 | ff_rtmp_packet_write(rt->stream, pkt, rt->chunk_size, rt->prev_pkt[1]); | |
9fd6b843 KS |
567 | rt->chunk_size = AV_RB32(pkt->data); |
568 | if (rt->chunk_size <= 0) { | |
569 | av_log(LOG_CONTEXT, AV_LOG_ERROR, "Incorrect chunk size %d\n", rt->chunk_size); | |
570 | return -1; | |
571 | } | |
572 | av_log(LOG_CONTEXT, AV_LOG_DEBUG, "New chunk size = %d\n", rt->chunk_size); | |
573 | break; | |
574 | case RTMP_PT_PING: | |
575 | t = AV_RB16(pkt->data); | |
576 | if (t == 6) | |
577 | gen_pong(s, rt, pkt); | |
578 | break; | |
bf7c1719 KS |
579 | case RTMP_PT_CLIENT_BW: |
580 | if (pkt->data_size < 4) { | |
581 | av_log(LOG_CONTEXT, AV_LOG_ERROR, | |
582 | "Client bandwidth report packet is less than 4 bytes long (%d)\n", | |
583 | pkt->data_size); | |
584 | return -1; | |
585 | } | |
586 | av_log(LOG_CONTEXT, AV_LOG_DEBUG, "Client bandwidth = %d\n", AV_RB32(pkt->data)); | |
587 | rt->client_report_size = AV_RB32(pkt->data) >> 1; | |
588 | break; | |
9fd6b843 KS |
589 | case RTMP_PT_INVOKE: |
590 | //TODO: check for the messages sent for wrong state? | |
591 | if (!memcmp(pkt->data, "\002\000\006_error", 9)) { | |
592 | uint8_t tmpstr[256]; | |
593 | ||
594 | if (!ff_amf_get_field_value(pkt->data + 9, data_end, | |
595 | "description", tmpstr, sizeof(tmpstr))) | |
596 | av_log(LOG_CONTEXT, AV_LOG_ERROR, "Server error: %s\n",tmpstr); | |
597 | return -1; | |
598 | } else if (!memcmp(pkt->data, "\002\000\007_result", 10)) { | |
599 | switch (rt->state) { | |
600 | case STATE_HANDSHAKED: | |
6bf22e18 S |
601 | if (!rt->is_input) { |
602 | gen_release_stream(s, rt); | |
603 | gen_fcpublish_stream(s, rt); | |
604 | rt->state = STATE_RELEASING; | |
605 | } else { | |
606 | rt->state = STATE_CONNECTING; | |
607 | } | |
9fd6b843 | 608 | gen_create_stream(s, rt); |
6bf22e18 S |
609 | break; |
610 | case STATE_FCPUBLISH: | |
9fd6b843 KS |
611 | rt->state = STATE_CONNECTING; |
612 | break; | |
6bf22e18 S |
613 | case STATE_RELEASING: |
614 | rt->state = STATE_FCPUBLISH; | |
615 | /* hack for Wowza Media Server, it does not send result for | |
616 | * releaseStream and FCPublish calls */ | |
617 | if (!pkt->data[10]) { | |
618 | int pkt_id = (int) av_int2dbl(AV_RB64(pkt->data + 11)); | |
619 | if (pkt_id == 4) | |
620 | rt->state = STATE_CONNECTING; | |
621 | } | |
e07c92e4 | 622 | if (rt->state != STATE_CONNECTING) |
6bf22e18 | 623 | break; |
9fd6b843 KS |
624 | case STATE_CONNECTING: |
625 | //extract a number from the result | |
626 | if (pkt->data[10] || pkt->data[19] != 5 || pkt->data[20]) { | |
627 | av_log(LOG_CONTEXT, AV_LOG_WARNING, "Unexpected reply on connect()\n"); | |
628 | } else { | |
629 | rt->main_channel_id = (int) av_int2dbl(AV_RB64(pkt->data + 21)); | |
630 | } | |
6bf22e18 | 631 | if (rt->is_input) { |
c7240611 | 632 | gen_play(s, rt); |
6bf22e18 S |
633 | } else { |
634 | gen_publish(s, rt); | |
635 | } | |
9fd6b843 KS |
636 | rt->state = STATE_READY; |
637 | break; | |
638 | } | |
639 | } else if (!memcmp(pkt->data, "\002\000\010onStatus", 11)) { | |
640 | const uint8_t* ptr = pkt->data + 11; | |
641 | uint8_t tmpstr[256]; | |
9fd6b843 KS |
642 | |
643 | for (i = 0; i < 2; i++) { | |
644 | t = ff_amf_tag_size(ptr, data_end); | |
645 | if (t < 0) | |
646 | return 1; | |
647 | ptr += t; | |
648 | } | |
649 | t = ff_amf_get_field_value(ptr, data_end, | |
650 | "level", tmpstr, sizeof(tmpstr)); | |
651 | if (!t && !strcmp(tmpstr, "error")) { | |
652 | if (!ff_amf_get_field_value(ptr, data_end, | |
653 | "description", tmpstr, sizeof(tmpstr))) | |
654 | av_log(LOG_CONTEXT, AV_LOG_ERROR, "Server error: %s\n",tmpstr); | |
655 | return -1; | |
656 | } | |
657 | t = ff_amf_get_field_value(ptr, data_end, | |
658 | "code", tmpstr, sizeof(tmpstr)); | |
6bf22e18 | 659 | if (!t && !strcmp(tmpstr, "NetStream.Play.Start")) rt->state = STATE_PLAYING; |
72b870b9 MS |
660 | if (!t && !strcmp(tmpstr, "NetStream.Play.Stop")) rt->state = STATE_STOPPED; |
661 | if (!t && !strcmp(tmpstr, "NetStream.Play.UnpublishNotify")) rt->state = STATE_STOPPED; | |
6bf22e18 | 662 | if (!t && !strcmp(tmpstr, "NetStream.Publish.Start")) rt->state = STATE_PUBLISHING; |
9fd6b843 KS |
663 | } |
664 | break; | |
665 | } | |
666 | return 0; | |
667 | } | |
668 | ||
669 | /** | |
49bd8e4b | 670 | * Interact with the server by receiving and sending RTMP packets until |
9fd6b843 KS |
671 | * there is some significant data (media data or expected status notification). |
672 | * | |
673 | * @param s reading context | |
1d8041b3 SS |
674 | * @param for_header non-zero value tells function to work until it |
675 | * gets notification from the server that playing has been started, | |
676 | * otherwise function will work until some media data is received (or | |
677 | * an error happens) | |
9fd6b843 KS |
678 | * @return 0 for successful operation, negative value in case of error |
679 | */ | |
680 | static int get_packet(URLContext *s, int for_header) | |
681 | { | |
682 | RTMPContext *rt = s->priv_data; | |
683 | int ret; | |
56e29bf2 S |
684 | uint8_t *p; |
685 | const uint8_t *next; | |
686 | uint32_t data_size; | |
687 | uint32_t ts, cts, pts=0; | |
9fd6b843 | 688 | |
72b870b9 MS |
689 | if (rt->state == STATE_STOPPED) |
690 | return AVERROR_EOF; | |
691 | ||
e07c92e4 | 692 | for (;;) { |
9fd6b843 KS |
693 | RTMPPacket rpkt; |
694 | if ((ret = ff_rtmp_packet_read(rt->stream, &rpkt, | |
adb54961 | 695 | rt->chunk_size, rt->prev_pkt[0])) <= 0) { |
b381a823 | 696 | if (ret == 0) { |
9fd6b843 KS |
697 | return AVERROR(EAGAIN); |
698 | } else { | |
699 | return AVERROR(EIO); | |
700 | } | |
701 | } | |
bf7c1719 KS |
702 | rt->bytes_read += ret; |
703 | if (rt->bytes_read > rt->last_bytes_read + rt->client_report_size) { | |
704 | av_log(LOG_CONTEXT, AV_LOG_DEBUG, "Sending bytes read report\n"); | |
705 | gen_bytes_read(s, rt, rpkt.timestamp + 1); | |
706 | rt->last_bytes_read = rt->bytes_read; | |
707 | } | |
9fd6b843 KS |
708 | |
709 | ret = rtmp_parse_result(s, rt, &rpkt); | |
710 | if (ret < 0) {//serious error in current packet | |
711 | ff_rtmp_packet_destroy(&rpkt); | |
712 | return -1; | |
713 | } | |
72b870b9 MS |
714 | if (rt->state == STATE_STOPPED) { |
715 | ff_rtmp_packet_destroy(&rpkt); | |
716 | return AVERROR_EOF; | |
717 | } | |
6bf22e18 | 718 | if (for_header && (rt->state == STATE_PLAYING || rt->state == STATE_PUBLISHING)) { |
9fd6b843 KS |
719 | ff_rtmp_packet_destroy(&rpkt); |
720 | return 0; | |
721 | } | |
6bf22e18 | 722 | if (!rpkt.data_size || !rt->is_input) { |
9fd6b843 KS |
723 | ff_rtmp_packet_destroy(&rpkt); |
724 | continue; | |
725 | } | |
726 | if (rpkt.type == RTMP_PT_VIDEO || rpkt.type == RTMP_PT_AUDIO || | |
afbacb93 | 727 | (rpkt.type == RTMP_PT_NOTIFY && !memcmp("\002\000\012onMetaData", rpkt.data, 13))) { |
56e29bf2 | 728 | ts = rpkt.timestamp; |
9fd6b843 | 729 | |
9fd6b843 KS |
730 | // generate packet header and put data into buffer for FLV demuxer |
731 | rt->flv_off = 0; | |
732 | rt->flv_size = rpkt.data_size + 15; | |
733 | rt->flv_data = p = av_realloc(rt->flv_data, rt->flv_size); | |
734 | bytestream_put_byte(&p, rpkt.type); | |
735 | bytestream_put_be24(&p, rpkt.data_size); | |
736 | bytestream_put_be24(&p, ts); | |
737 | bytestream_put_byte(&p, ts >> 24); | |
738 | bytestream_put_be24(&p, 0); | |
739 | bytestream_put_buffer(&p, rpkt.data, rpkt.data_size); | |
740 | bytestream_put_be32(&p, 0); | |
741 | ff_rtmp_packet_destroy(&rpkt); | |
742 | return 0; | |
743 | } else if (rpkt.type == RTMP_PT_METADATA) { | |
744 | // we got raw FLV data, make it available for FLV demuxer | |
745 | rt->flv_off = 0; | |
746 | rt->flv_size = rpkt.data_size; | |
747 | rt->flv_data = av_realloc(rt->flv_data, rt->flv_size); | |
56e29bf2 S |
748 | /* rewrite timestamps */ |
749 | next = rpkt.data; | |
750 | ts = rpkt.timestamp; | |
751 | while (next - rpkt.data < rpkt.data_size - 11) { | |
752 | next++; | |
753 | data_size = bytestream_get_be24(&next); | |
754 | p=next; | |
755 | cts = bytestream_get_be24(&next); | |
aae9a093 | 756 | cts |= bytestream_get_byte(&next) << 24; |
56e29bf2 S |
757 | if (pts==0) |
758 | pts=cts; | |
759 | ts += cts - pts; | |
760 | pts = cts; | |
761 | bytestream_put_be24(&p, ts); | |
762 | bytestream_put_byte(&p, ts >> 24); | |
763 | next += data_size + 3 + 4; | |
764 | } | |
9fd6b843 KS |
765 | memcpy(rt->flv_data, rpkt.data, rpkt.data_size); |
766 | ff_rtmp_packet_destroy(&rpkt); | |
767 | return 0; | |
768 | } | |
769 | ff_rtmp_packet_destroy(&rpkt); | |
770 | } | |
771 | return 0; | |
772 | } | |
773 | ||
774 | static int rtmp_close(URLContext *h) | |
775 | { | |
776 | RTMPContext *rt = h->priv_data; | |
777 | ||
e07c92e4 | 778 | if (!rt->is_input) { |
6bf22e18 S |
779 | rt->flv_data = NULL; |
780 | if (rt->out_pkt.data_size) | |
781 | ff_rtmp_packet_destroy(&rt->out_pkt); | |
615c2879 S |
782 | if (rt->state > STATE_FCPUBLISH) |
783 | gen_fcunpublish_stream(h, rt); | |
6bf22e18 | 784 | } |
615c2879 S |
785 | if (rt->state > STATE_HANDSHAKED) |
786 | gen_delete_stream(h, rt); | |
6bf22e18 | 787 | |
9fd6b843 | 788 | av_freep(&rt->flv_data); |
e52a9145 | 789 | ffurl_close(rt->stream); |
9fd6b843 KS |
790 | av_free(rt); |
791 | return 0; | |
792 | } | |
793 | ||
794 | /** | |
49bd8e4b | 795 | * Open RTMP connection and verify that the stream can be played. |
9fd6b843 KS |
796 | * |
797 | * URL syntax: rtmp://server[:port][/app][/playpath] | |
798 | * where 'app' is first one or two directories in the path | |
799 | * (e.g. /ondemand/, /flash/live/, etc.) | |
800 | * and 'playpath' is a file name (the rest of the path, | |
801 | * may be prefixed with "mp4:") | |
802 | */ | |
803 | static int rtmp_open(URLContext *s, const char *uri, int flags) | |
804 | { | |
805 | RTMPContext *rt; | |
5e9ad759 | 806 | char proto[8], hostname[256], path[1024], *fname; |
9fd6b843 | 807 | uint8_t buf[2048]; |
b316991b | 808 | int port; |
9fd6b843 KS |
809 | int ret; |
810 | ||
9fd6b843 KS |
811 | rt = av_mallocz(sizeof(RTMPContext)); |
812 | if (!rt) | |
813 | return AVERROR(ENOMEM); | |
814 | s->priv_data = rt; | |
f87b1b37 | 815 | rt->is_input = !(flags & AVIO_WRONLY); |
9fd6b843 | 816 | |
f3bfe388 | 817 | av_url_split(proto, sizeof(proto), NULL, 0, hostname, sizeof(hostname), &port, |
f984dcf6 | 818 | path, sizeof(path), s->filename); |
9fd6b843 KS |
819 | |
820 | if (port < 0) | |
821 | port = RTMP_DEFAULT_PORT; | |
57b5555c | 822 | ff_url_join(buf, sizeof(buf), "tcp", NULL, hostname, port, NULL); |
9fd6b843 | 823 | |
f87b1b37 | 824 | if (ffurl_open(&rt->stream, buf, AVIO_RDWR) < 0) { |
fe523958 | 825 | av_log(LOG_CONTEXT, AV_LOG_ERROR, "Cannot open connection %s\n", buf); |
9fd6b843 | 826 | goto fail; |
fe523958 | 827 | } |
9fd6b843 | 828 | |
c7240611 KS |
829 | rt->state = STATE_START; |
830 | if (rtmp_handshake(s, rt)) | |
831 | return -1; | |
9fd6b843 | 832 | |
c7240611 KS |
833 | rt->chunk_size = 128; |
834 | rt->state = STATE_HANDSHAKED; | |
835 | //extract "app" part from path | |
836 | if (!strncmp(path, "/ondemand/", 10)) { | |
837 | fname = path + 10; | |
838 | memcpy(rt->app, "ondemand", 9); | |
839 | } else { | |
840 | char *p = strchr(path + 1, '/'); | |
841 | if (!p) { | |
842 | fname = path + 1; | |
843 | rt->app[0] = '\0'; | |
9fd6b843 | 844 | } else { |
c7240611 KS |
845 | char *c = strchr(p + 1, ':'); |
846 | fname = strchr(p + 1, '/'); | |
847 | if (!fname || c < fname) { | |
848 | fname = p + 1; | |
849 | av_strlcpy(rt->app, path + 1, p - path); | |
9fd6b843 | 850 | } else { |
c7240611 KS |
851 | fname++; |
852 | av_strlcpy(rt->app, path + 1, fname - path - 1); | |
9fd6b843 KS |
853 | } |
854 | } | |
c7240611 KS |
855 | } |
856 | if (!strchr(fname, ':') && | |
857 | (!strcmp(fname + strlen(fname) - 4, ".f4v") || | |
858 | !strcmp(fname + strlen(fname) - 4, ".mp4"))) { | |
859 | memcpy(rt->playpath, "mp4:", 5); | |
860 | } else { | |
861 | rt->playpath[0] = 0; | |
862 | } | |
863 | strncat(rt->playpath, fname, sizeof(rt->playpath) - 5); | |
9fd6b843 | 864 | |
bf7c1719 KS |
865 | rt->client_report_size = 1048576; |
866 | rt->bytes_read = 0; | |
867 | rt->last_bytes_read = 0; | |
868 | ||
c7240611 KS |
869 | av_log(LOG_CONTEXT, AV_LOG_DEBUG, "Proto = %s, path = %s, app = %s, fname = %s\n", |
870 | proto, path, rt->app, rt->playpath); | |
871 | gen_connect(s, rt, proto, hostname, port); | |
9fd6b843 | 872 | |
c7240611 KS |
873 | do { |
874 | ret = get_packet(s, 1); | |
875 | } while (ret == EAGAIN); | |
876 | if (ret < 0) | |
877 | goto fail; | |
6bf22e18 S |
878 | |
879 | if (rt->is_input) { | |
9fd6b843 KS |
880 | // generate FLV header for demuxer |
881 | rt->flv_size = 13; | |
882 | rt->flv_data = av_realloc(rt->flv_data, rt->flv_size); | |
883 | rt->flv_off = 0; | |
884 | memcpy(rt->flv_data, "FLV\1\5\0\0\0\011\0\0\0\0", rt->flv_size); | |
6bf22e18 S |
885 | } else { |
886 | rt->flv_size = 0; | |
887 | rt->flv_data = NULL; | |
888 | rt->flv_off = 0; | |
9fd6b843 KS |
889 | } |
890 | ||
5958df34 | 891 | s->max_packet_size = rt->stream->max_packet_size; |
9fd6b843 KS |
892 | s->is_streamed = 1; |
893 | return 0; | |
894 | ||
895 | fail: | |
896 | rtmp_close(s); | |
897 | return AVERROR(EIO); | |
898 | } | |
899 | ||
900 | static int rtmp_read(URLContext *s, uint8_t *buf, int size) | |
901 | { | |
902 | RTMPContext *rt = s->priv_data; | |
903 | int orig_size = size; | |
904 | int ret; | |
905 | ||
906 | while (size > 0) { | |
907 | int data_left = rt->flv_size - rt->flv_off; | |
908 | ||
909 | if (data_left >= size) { | |
910 | memcpy(buf, rt->flv_data + rt->flv_off, size); | |
911 | rt->flv_off += size; | |
912 | return orig_size; | |
913 | } | |
914 | if (data_left > 0) { | |
915 | memcpy(buf, rt->flv_data + rt->flv_off, data_left); | |
916 | buf += data_left; | |
917 | size -= data_left; | |
918 | rt->flv_off = rt->flv_size; | |
e8ccf245 | 919 | return data_left; |
9fd6b843 KS |
920 | } |
921 | if ((ret = get_packet(s, 0)) < 0) | |
922 | return ret; | |
923 | } | |
924 | return orig_size; | |
925 | } | |
926 | ||
9ad4c65f | 927 | static int rtmp_write(URLContext *s, const uint8_t *buf, int size) |
9fd6b843 | 928 | { |
9ad4c65f | 929 | RTMPContext *rt = s->priv_data; |
6bf22e18 S |
930 | int size_temp = size; |
931 | int pktsize, pkttype; | |
932 | uint32_t ts; | |
933 | const uint8_t *buf_temp = buf; | |
934 | ||
935 | if (size < 11) { | |
936 | av_log(LOG_CONTEXT, AV_LOG_DEBUG, "FLV packet too small %d\n", size); | |
937 | return 0; | |
938 | } | |
939 | ||
940 | do { | |
941 | if (!rt->flv_off) { | |
942 | //skip flv header | |
943 | if (buf_temp[0] == 'F' && buf_temp[1] == 'L' && buf_temp[2] == 'V') { | |
944 | buf_temp += 9 + 4; | |
945 | size_temp -= 9 + 4; | |
946 | } | |
947 | ||
948 | pkttype = bytestream_get_byte(&buf_temp); | |
949 | pktsize = bytestream_get_be24(&buf_temp); | |
950 | ts = bytestream_get_be24(&buf_temp); | |
951 | ts |= bytestream_get_byte(&buf_temp) << 24; | |
952 | bytestream_get_be24(&buf_temp); | |
953 | size_temp -= 11; | |
954 | rt->flv_size = pktsize; | |
955 | ||
956 | //force 12bytes header | |
957 | if (((pkttype == RTMP_PT_VIDEO || pkttype == RTMP_PT_AUDIO) && ts == 0) || | |
958 | pkttype == RTMP_PT_NOTIFY) { | |
959 | if (pkttype == RTMP_PT_NOTIFY) | |
960 | pktsize += 16; | |
961 | rt->prev_pkt[1][RTMP_SOURCE_CHANNEL].channel_id = 0; | |
962 | } | |
963 | ||
964 | //this can be a big packet, it's better to send it right here | |
965 | ff_rtmp_packet_create(&rt->out_pkt, RTMP_SOURCE_CHANNEL, pkttype, ts, pktsize); | |
966 | rt->out_pkt.extra = rt->main_channel_id; | |
967 | rt->flv_data = rt->out_pkt.data; | |
968 | ||
969 | if (pkttype == RTMP_PT_NOTIFY) | |
970 | ff_amf_write_string(&rt->flv_data, "@setDataFrame"); | |
971 | } | |
972 | ||
973 | if (rt->flv_size - rt->flv_off > size_temp) { | |
974 | bytestream_get_buffer(&buf_temp, rt->flv_data + rt->flv_off, size_temp); | |
975 | rt->flv_off += size_temp; | |
976 | } else { | |
977 | bytestream_get_buffer(&buf_temp, rt->flv_data + rt->flv_off, rt->flv_size - rt->flv_off); | |
978 | rt->flv_off += rt->flv_size - rt->flv_off; | |
979 | } | |
980 | ||
981 | if (rt->flv_off == rt->flv_size) { | |
982 | bytestream_get_be32(&buf_temp); | |
983 | ||
984 | ff_rtmp_packet_write(rt->stream, &rt->out_pkt, rt->chunk_size, rt->prev_pkt[1]); | |
985 | ff_rtmp_packet_destroy(&rt->out_pkt); | |
986 | rt->flv_size = 0; | |
987 | rt->flv_off = 0; | |
988 | } | |
989 | } while (buf_temp - buf < size_temp); | |
990 | return size; | |
9fd6b843 KS |
991 | } |
992 | ||
c6610a21 | 993 | URLProtocol ff_rtmp_protocol = { |
f35ff97f AK |
994 | .name = "rtmp", |
995 | .url_open = rtmp_open, | |
996 | .url_read = rtmp_read, | |
997 | .url_write = rtmp_write, | |
998 | .url_close = rtmp_close, | |
9fd6b843 | 999 | }; |