/* en50221 encoder An implementation for libdvb an implementation for the en50221 transport layer Copyright (C) 2004, 2005 Manu Abraham Copyright (C) 2005 Julian Scheel (julian at jusst dot de) Copyright (C) 2006 Andrew de Quincey (adq_dvb@lidskialf.net) This library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with this library; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ #include #include #include #include "en50221_app_dvb.h" #include "en50221_app_tags.h" #include "asn_1.h" struct en50221_app_dvb { struct en50221_app_send_functions *funcs; en50221_app_dvb_tune_callback tune_callback; void *tune_callback_arg; en50221_app_dvb_replace_callback replace_callback; void *replace_callback_arg; en50221_app_dvb_clear_replace_callback clear_replace_callback; void *clear_replace_callback_arg; pthread_mutex_t lock; }; static int en50221_app_dvb_parse_tune(struct en50221_app_dvb *dvb, uint8_t slot_id, uint16_t session_number, uint8_t * data, uint32_t data_length); static int en50221_app_dvb_parse_replace(struct en50221_app_dvb *dvb, uint8_t slot_id, uint16_t session_number, uint8_t * data, uint32_t data_length); static int en50221_app_dvb_parse_clear_replace(struct en50221_app_dvb *dvb, uint8_t slot_id, uint16_t session_number, uint8_t * data, uint32_t data_length); struct en50221_app_dvb *en50221_app_dvb_create(struct en50221_app_send_functions *funcs) { struct en50221_app_dvb *dvb = NULL; // create structure and set it up dvb = malloc(sizeof(struct en50221_app_dvb)); if (dvb == NULL) { return NULL; } dvb->funcs = funcs; dvb->tune_callback = NULL; dvb->replace_callback = NULL; dvb->clear_replace_callback = NULL; pthread_mutex_init(&dvb->lock, NULL); // done return dvb; } void en50221_app_dvb_destroy(struct en50221_app_dvb *dvb) { pthread_mutex_destroy(&dvb->lock); free(dvb); } void en50221_app_dvb_register_tune_callback(struct en50221_app_dvb *dvb, en50221_app_dvb_tune_callback callback, void *arg) { pthread_mutex_lock(&dvb->lock); dvb->tune_callback = callback; dvb->tune_callback_arg = arg; pthread_mutex_unlock(&dvb->lock); } void en50221_app_dvb_register_replace_callback(struct en50221_app_dvb *dvb, en50221_app_dvb_replace_callback callback, void *arg) { pthread_mutex_lock(&dvb->lock); dvb->replace_callback = callback; dvb->replace_callback_arg = arg; pthread_mutex_unlock(&dvb->lock); } void en50221_app_dvb_register_clear_replace_callback(struct en50221_app_dvb *dvb, en50221_app_dvb_clear_replace_callback callback, void *arg) { pthread_mutex_lock(&dvb->lock); dvb->clear_replace_callback = callback; dvb->clear_replace_callback_arg = arg; pthread_mutex_unlock(&dvb->lock); } int en50221_app_dvb_ask_release(struct en50221_app_dvb *dvb, uint16_t session_number) { uint8_t data[4]; data[0] = (TAG_ASK_RELEASE >> 16) & 0xFF; data[1] = (TAG_ASK_RELEASE >> 8) & 0xFF; data[2] = TAG_ASK_RELEASE & 0xFF; data[3] = 0; return dvb->funcs->send_data(dvb->funcs->arg, session_number, data, 4); } int en50221_app_dvb_message(struct en50221_app_dvb *dvb, uint8_t slot_id, uint16_t session_number, uint32_t resource_id, uint8_t * data, uint32_t data_length) { (void) resource_id; // get the tag if (data_length < 3) { print(LOG_LEVEL, ERROR, 1, "Received short data\n"); return -1; } uint32_t tag = (data[0] << 16) | (data[1] << 8) | data[2]; switch (tag) { case TAG_TUNE: return en50221_app_dvb_parse_tune(dvb, slot_id, session_number, data + 3, data_length - 3); case TAG_REPLACE: return en50221_app_dvb_parse_replace(dvb, slot_id, session_number, data + 3, data_length - 3); case TAG_CLEAR_REPLACE: return en50221_app_dvb_parse_clear_replace(dvb, slot_id, session_number, data + 3, data_length - 3); } print(LOG_LEVEL, ERROR, 1, "Received unexpected tag %x\n", tag); return -1; } static int en50221_app_dvb_parse_tune(struct en50221_app_dvb *dvb, uint8_t slot_id, uint16_t session_number, uint8_t * data, uint32_t data_length) { // validate data if (data_length < 9) { print(LOG_LEVEL, ERROR, 1, "Received short data\n"); return -1; } if (data[0] != 8) { print(LOG_LEVEL, ERROR, 1, "Received short data\n"); return -1; } uint8_t *tune_data = data + 1; // parse it uint16_t network_id = (tune_data[0] << 8) | tune_data[1]; uint16_t original_network_id = (tune_data[2] << 8) | tune_data[3]; uint16_t transport_stream_id = (tune_data[4] << 8) | tune_data[5]; uint16_t service_id = (tune_data[6] << 8) | tune_data[7]; // tell the app pthread_mutex_lock(&dvb->lock); en50221_app_dvb_tune_callback cb = dvb->tune_callback; void *cb_arg = dvb->tune_callback_arg; pthread_mutex_unlock(&dvb->lock); if (cb) { return cb(cb_arg, slot_id, session_number, network_id, original_network_id, transport_stream_id, service_id); } return 0; } static int en50221_app_dvb_parse_replace(struct en50221_app_dvb *dvb, uint8_t slot_id, uint16_t session_number, uint8_t * data, uint32_t data_length) { // validate data if (data_length < 6) { print(LOG_LEVEL, ERROR, 1, "Received short data\n"); return -1; } if (data[0] != 5) { print(LOG_LEVEL, ERROR, 1, "Received short data\n"); return -1; } uint8_t *replace_data = data + 1; // parse it uint8_t replacement_ref = replace_data[0]; uint16_t replace_pid = ((replace_data[1] & 0x1f) << 8) | replace_data[2]; uint16_t replacement_pid = ((replace_data[3] & 0x1f) << 8) | replace_data[4]; // tell the app pthread_mutex_lock(&dvb->lock); en50221_app_dvb_replace_callback cb = dvb->replace_callback; void *cb_arg = dvb->replace_callback_arg; pthread_mutex_unlock(&dvb->lock); if (cb) { return cb(cb_arg, slot_id, session_number, replacement_ref, replace_pid, replacement_pid); } return 0; } static int en50221_app_dvb_parse_clear_replace(struct en50221_app_dvb *dvb, uint8_t slot_id, uint16_t session_number, uint8_t * data, uint32_t data_length) { // validate data if (data_length < 2) { print(LOG_LEVEL, ERROR, 1, "Received short data\n"); return -1; } if (data[0] != 1) { print(LOG_LEVEL, ERROR, 1, "Received short data\n"); return -1; } uint8_t *replace_data = data + 1; // parse it uint8_t replacement_ref = replace_data[0]; // tell the app pthread_mutex_lock(&dvb->lock); en50221_app_dvb_clear_replace_callback cb = dvb->clear_replace_callback; void *cb_arg = dvb->clear_replace_callback_arg; pthread_mutex_unlock(&dvb->lock); if (cb) { return cb(cb_arg, slot_id, session_number, replacement_ref); } return 0; } ' href='#n154'>154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528