cinelerra-5.1/cinelerra/renderfarmclient.C

   1
   2 /*
   3  * CINELERRA
   4  * Copyright (C) 2008 Adam Williams <broadcast at earthling dot net>
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write to the Free Software
  18  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19  *
  20  */
  21
  22 #include "asset.h"
  23 #include "assets.h"
  24 #include "clip.h"
  25 #include "bchash.h"
  26 #include "dvbtune.h"
  27 #include "edl.h"
  28 #include "filesystem.h"
  29 #include "filexml.h"
  30 #include "language.h"
  31 #include "mutex.h"
  32 #include "mwindow.h"
  33 #include "pluginserver.h"
  34 #include "preferences.h"
  35 #include "renderfarm.h"
  36 #include "renderfarmclient.h"
  37 //#include "renderfarmfsclient.h"
  38 #include "sighandler.h"
  39
  40 #include <arpa/inet.h>
  41 #include <errno.h>
  42 #include <fcntl.h>
  43 #include <netdb.h>
  44 #include <netinet/in.h>
  45 #include <stdio.h>
  46 #include <string.h>
  47 #include <sys/socket.h>
  48 #include <sys/types.h>
  49 #include <sys/un.h>
  50 #include <sys/wait.h>
  51 #include <unistd.h>
  52
  53
  54 #ifndef AF_FILE
  55 #define AF_FILE AF_LOCAL
  56 #endif
  57
  58 // The render client waits for connections from the server.
  59 // Then it starts a thread for each connection.
  60 RenderFarmClient::RenderFarmClient(int port,
  61         char *deamon_path,
  62         int nice_value,
  63         char *config_path)
  64 {
  65         char string[BCTEXTLEN];
  66
  67         this->port = port;
  68         this->deamon_path = deamon_path;
  69         SigHandler *signals = new SigHandler;
  70         signals->initialize("/tmp/cinelerra_farm%d.dmp");
  71
  72         this_pid = getpid();
  73         (void)nice(nice_value);
  74
  75         boot_defaults = 0;
  76         MWindow::init_defaults(boot_defaults, config_path);
  77         boot_preferences = new Preferences;
  78         boot_preferences->load_defaults(boot_defaults);
  79         MWindow::init_plugins(0, boot_preferences);
  80         BC_Signals::set_catch_segv(boot_preferences->trap_sigsegv);
  81         BC_Signals::set_catch_intr(0);
  82         if( boot_preferences->trap_sigsegv ) {
  83                 BC_Trace::enable_locks();
  84         }
  85         else {
  86                 BC_Trace::disable_locks();
  87         }
  88
  89         strcpy(string, boot_preferences->plugin_dir);
  90         strcat(string, "/" FONT_SEARCHPATH);
  91         BC_Resources::init_fontconfig(string);
  92 }
  93
  94
  95
  96
  97 RenderFarmClient::~RenderFarmClient()
  98 {
  99         delete boot_defaults;
 100         delete boot_preferences;
 101 }
 102
 103
 104 void RenderFarmClient::main_loop()
 105 {
 106         int socket_fd;
 107         BC_WindowBase::get_resources()->vframe_shm = 1;
 108
 109
 110 // Open listening port
 111
 112         if(!deamon_path)
 113         {
 114                 struct sockaddr_in addr;
 115
 116                 addr.sin_family = AF_INET;
 117                 addr.sin_port = htons((unsigned short)port);
 118                 addr.sin_addr.s_addr = htonl(INADDR_ANY);
 119
 120                 if((socket_fd = socket(PF_INET, SOCK_STREAM, 0)) < 0)
 121                 {
 122                         perror(_("RenderFarmClient::main_loop: socket"));
 123                         return;
 124                 }
 125
 126                 if(bind(socket_fd,
 127                         (struct sockaddr*)&addr,
 128                         sizeof(addr)) < 0)
 129                 {
 130                         fprintf(stderr,
 131                                 _("RenderFarmClient::main_loop: bind port %d: %s"),
 132                                 port,
 133                                 strerror(errno));
 134                         return;
 135                 }
 136         }
 137         else
 138         {
 139                 struct sockaddr_un addr;
 140                 addr.sun_family = AF_FILE;
 141                 strcpy(addr.sun_path, deamon_path);
 142                 int size = (offsetof(struct sockaddr_un, sun_path) +
 143                         strlen(deamon_path) + 1);
 144
 145                 if((socket_fd = socket(PF_UNIX, SOCK_STREAM, 0)) < 0)
 146                 {
 147                         perror(_("RenderFarmClient::main_loop: socket"));
 148                         return;
 149                 }
 150
 151                 if(bind(socket_fd,
 152                         (struct sockaddr*)&addr,
 153                         size) < 0)
 154                 {
 155                         fprintf(stderr,
 156                                 _("RenderFarmClient::main_loop: bind path %s: %s\n"),
 157                                 deamon_path,
 158                                 strerror(errno));
 159                         return;
 160                 }
 161         }
 162
 163 // Wait for connections
 164         printf("RenderFarmClient::main_loop: client started\n");
 165         while(1)
 166         {
 167                 if(listen(socket_fd, 256) < 0) {
 168                         perror(_("RenderFarmClient::main_loop: listen"));
 169                         return;
 170                 }
 171
 172                 int new_socket_fd;
 173
 174                 if(!deamon_path)
 175                 {
 176                         struct sockaddr_in clientname;
 177                         socklen_t size = sizeof(clientname);
 178                         if( (new_socket_fd = accept(socket_fd,
 179                                 (struct sockaddr*)&clientname, &size) ) < 0 ) {
 180                                 perror(_("RenderFarmClient::main_loop: accept"));
 181                                 return;
 182                         }
 183 printf("RenderFarmClient::main_loop: Session started from %s\n", inet_ntoa(clientname.sin_addr));
 184                         RenderFarmClientThread *thread =
 185                                 new RenderFarmClientThread(this);
 186                         thread->main_loop(new_socket_fd);
 187                 }
 188                 else
 189                 {
 190                         struct sockaddr_un clientname;
 191                         socklen_t size = sizeof(clientname);
 192                         if( (new_socket_fd = accept(socket_fd,
 193                                         (struct sockaddr*)&clientname, &size)) < 0 ) {
 194                                 perror(_("RenderFarmClient::main_loop: accept"));
 195                                 return;
 196                         }
 197 printf("RenderFarmClient::main_loop: Session started from %s\n", clientname.sun_path);
 198                         RenderFarmClientThread *thread =
 199                                 new RenderFarmClientThread(this);
 200                         thread->main_loop(new_socket_fd);
 201                 }
 202         }
 203 }
 204
 205 void RenderFarmClient::kill_client()
 206 {
 207 printf("RenderFarmClient::kill_client 1\n");
 208         if(deamon_path)
 209         {
 210 printf("RenderFarmClient::kill_client 2\n");
 211                 remove(deamon_path);
 212                 kill(this_pid, SIGKILL);
 213         }
 214 }
 215
 216
 217 // The thread requests jobs from the server until the job table is empty
 218 // or the server reports an error.  This thread must poll the server
 219 // after every frame for the error status.
 220 // Detaches when finished.
 221 RenderFarmClientThread::RenderFarmClientThread(RenderFarmClient *client)
 222  : Thread(0, 0, 1)
 223 {
 224         this->client = client;
 225         this->edl = 0;
 226         frames_per_second = 0;
 227         Thread::set_synchronous(0);
 228 //      fs_client = 0;
 229         mutex_lock = new Mutex("RenderFarmClientThread::mutex_lock");
 230         watchdog = 0;
 231         keep_alive = 0;
 232 }
 233
 234 RenderFarmClientThread::~RenderFarmClientThread()
 235 {
 236 //      if(fs_client) delete fs_client;
 237         delete mutex_lock;
 238         delete watchdog;
 239         delete keep_alive;
 240 }
 241
 242
 243 int RenderFarmClientThread::send_request_header(int request,
 244         int len)
 245 {
 246         unsigned char datagram[5];
 247         datagram[0] = request;
 248
 249         int i = 1;
 250         STORE_INT32(len);
 251 // printf("RenderFarmClientThread::send_request_header %d %02x%02x%02x%02x%02x\n",
 252 // request, datagram[0], datagram[1], datagram[2], datagram[3], datagram[4]);
 253
 254         return (write_socket((char*)datagram, 5) != 5);
 255 }
 256
 257 int RenderFarmClientThread::write_socket(char *data, int len)
 258 {
 259 //printf("RenderFarmClientThread::write_socket 1\n");
 260         int result = write(socket_fd, data, len);
 261 //printf("RenderFarmClientThread::write_socket 10\n");
 262         return result;
 263 }
 264
 265 int RenderFarmClientThread::read_socket(char *data, int len)
 266 {
 267         int bytes_read = 0;
 268         int offset = 0;
 269 //printf("RenderFarmClientThread::read_socket 1\n");
 270         watchdog->begin_request();
 271         while(len > 0 && bytes_read >= 0)
 272         {
 273                 bytes_read = read(socket_fd, data + offset, len);
 274                 if(bytes_read > 0)
 275                 {
 276                         len -= bytes_read;
 277                         offset += bytes_read;
 278                 }
 279                 else
 280                 if(bytes_read < 0)
 281                 {
 282                         break;
 283                 }
 284         }
 285         watchdog->end_request();
 286 //printf("RenderFarmClientThread::read_socket 10\n");
 287
 288         return offset;
 289 }
 290
 291 int RenderFarmClientThread::write_int64(int64_t value)
 292 {
 293         unsigned char data[sizeof(int64_t)];
 294         data[0] = (value >> 56) & 0xff;
 295         data[1] = (value >> 48) & 0xff;
 296         data[2] = (value >> 40) & 0xff;
 297         data[3] = (value >> 32) & 0xff;
 298         data[4] = (value >> 24) & 0xff;
 299         data[5] = (value >> 16) & 0xff;
 300         data[6] = (value >> 8) & 0xff;
 301         data[7] = value & 0xff;
 302         return (write_socket((char*)data, sizeof(int64_t)) != sizeof(int64_t));
 303 }
 304
 305 int64_t RenderFarmClientThread::read_int64(int *error)
 306 {
 307         int temp = 0;
 308         if(!error) error = &temp;
 309
 310         unsigned char data[sizeof(int64_t)];
 311         *error = (read_socket((char*)data, sizeof(int64_t)) != sizeof(int64_t));
 312
 313 // Make it return 1 if error so it can be used to read a result code from the
 314 // server.
 315         int64_t result = 1;
 316         if(!*error)
 317         {
 318                 result = (((int64_t)data[0]) << 56) |
 319                         (((uint64_t)data[1]) << 48) |
 320                         (((uint64_t)data[2]) << 40) |
 321                         (((uint64_t)data[3]) << 32) |
 322                         (((uint64_t)data[4]) << 24) |
 323                         (((uint64_t)data[5]) << 16) |
 324                         (((uint64_t)data[6]) << 8)  |
 325                         data[7];
 326         }
 327         return result;
 328 }
 329
 330 void RenderFarmClientThread::read_string(char* &string)
 331 {
 332         unsigned char header[4];
 333         if(read_socket((char*)header, 4) != 4)
 334         {
 335                 string = 0;
 336                 return;
 337         }
 338
 339         int64_t len = (((u_int32_t)header[0]) << 24) |
 340                                 (((u_int32_t)header[1]) << 16) |
 341                                 (((u_int32_t)header[2]) << 8) |
 342                                 ((u_int32_t)header[3]);
 343
 344         if(len)
 345         {
 346                 string = new char[len];
 347                 if(read_socket(string, len) != len)
 348                 {
 349                         delete [] string;
 350                         string = 0;
 351                 }
 352         }
 353         else
 354                 string = 0;
 355
 356 }
 357
 358 void RenderFarmClientThread::abort()
 359 {
 360         send_completion(socket_fd);
 361         close(socket_fd);
 362         exit(1);
 363 }
 364
 365 void RenderFarmClientThread::lock(const char *location)
 366 {
 367         mutex_lock->lock(location);
 368 }
 369
 370 void RenderFarmClientThread::unlock()
 371 {
 372         mutex_lock->unlock();
 373 }
 374
 375 void RenderFarmClientThread::get_command(int socket_fd, int *command)
 376 {
 377         int error;
 378         *command = read_int64(&error);
 379         if(error)
 380         {
 381                 *command = 0;
 382                 return;
 383         }
 384 }
 385
 386
 387 void RenderFarmClientThread::read_preferences(int socket_fd,
 388         Preferences *preferences)
 389 {
 390         lock("RenderFarmClientThread::read_preferences");
 391         send_request_header(RENDERFARM_PREFERENCES,
 392                 0);
 393
 394         char *string;
 395         read_string(string);
 396
 397         BC_Hash defaults;
 398         defaults.load_string((char*)string);
 399         preferences->load_defaults(&defaults);
 400
 401         delete [] string;
 402         unlock();
 403 }
 404
 405
 406
 407 void RenderFarmClientThread::read_asset(int socket_fd, Asset *asset)
 408 {
 409         lock("RenderFarmClientThread::read_asset");
 410         send_request_header(RENDERFARM_ASSET,
 411                 0);
 412
 413         char *string1;
 414         char *string2;
 415         read_string(string1);
 416         read_string(string2);
 417
 418
 419
 420         FileXML file;
 421         file.read_from_string((char*)string2);
 422         asset->read(&file);
 423
 424
 425
 426         BC_Hash defaults;
 427         defaults.load_string((char*)string1);
 428         asset->load_defaults(&defaults, 0, 1, 1, 1, 1, 1);
 429
 430 //printf("RenderFarmClientThread::read_asset %d\n", __LINE__);
 431 //asset->dump();
 432
 433         delete [] string1;
 434         delete [] string2;
 435         unlock();
 436 }
 437
 438 void RenderFarmClientThread::read_edl(int socket_fd,
 439                 EDL *edl, Preferences *preferences)
 440 {
 441         lock("RenderFarmClientThread::read_edl");
 442         send_request_header(RENDERFARM_EDL, 0);
 443
 444         char *string;
 445         read_string(string);
 446
 447         FileXML file;
 448         file.read_from_string((char*)string);
 449         delete [] string;
 450
 451         edl->load_xml(&file, LOAD_ALL);
 452         unlock();
 453 }
 454
 455 int RenderFarmClientThread::read_package(int socket_fd, RenderPackage *package)
 456 {
 457         lock("RenderFarmClientThread::read_package");
 458         send_request_header(RENDERFARM_PACKAGE,
 459                 4);
 460
 461         unsigned char datagram[5];
 462         int i = 0;
 463
 464
 465 // Fails if -ieee isn't set.
 466         int64_t fixed = !EQUIV(frames_per_second, 0.0) ?
 467                 (int64_t)(frames_per_second * 65536.0) : 0;
 468         STORE_INT32(fixed);
 469         write_socket((char*)datagram, 4);
 470
 471
 472 //printf("RenderFarmClientThread::read_package 1 %f %ld\n", frames_per_second, fixed);
 473         char *data;
 474         unsigned char *data_ptr;
 475         read_string(data);
 476 //printf("RenderFarmClientThread::read_package 2 %p\n", data);
 477 // Signifies end of session.
 478         if(!data)
 479         {
 480 //              printf(_("RenderFarmClientThread::read_package no output path received.\n"));
 481                 unlock();
 482                 return 1;
 483         }
 484
 485 //printf("RenderFarmClientThread::read_package 2\n");
 486
 487
 488         data_ptr = (unsigned char*)data;
 489         strcpy(package->path, data);
 490         data_ptr += strlen(package->path);
 491         data_ptr++;
 492         package->audio_start = READ_INT32(data_ptr);
 493         data_ptr += 4;
 494         package->audio_end = READ_INT32(data_ptr);
 495         data_ptr += 4;
 496         package->video_start = READ_INT32(data_ptr);
 497         data_ptr += 4;
 498         package->video_end = READ_INT32(data_ptr);
 499         data_ptr += 4;
 500         package->use_brender = READ_INT32(data_ptr);
 501         data_ptr += 4;
 502         package->audio_do = READ_INT32(data_ptr);
 503         data_ptr += 4;
 504         package->video_do = READ_INT32(data_ptr);
 505
 506         delete [] data;
 507         unlock();
 508
 509         return 0;
 510 }
 511
 512 int RenderFarmClientThread::send_completion(int socket_fd)
 513 {
 514         lock("RenderFarmClientThread::send_completion");
 515         int result = send_request_header(RENDERFARM_DONE, 0);
 516         unlock();
 517         return result;
 518 }
 519
 520
 521 void RenderFarmClientThread::ping_server()
 522 {
 523         lock("RenderFarmClientThread::ping_server");
 524         send_request_header(RENDERFARM_KEEPALIVE, 0);
 525         unlock();
 526 }
 527
 528
 529
 530 void RenderFarmClientThread::main_loop(int socket_fd)
 531 {
 532         this->socket_fd = socket_fd;
 533
 534         Thread::start();
 535 }
 536
 537 void RenderFarmClientThread::run()
 538 {
 539 // Create new memory space
 540         pid = fork();
 541         if(pid != 0)
 542         {
 543                 int return_value;
 544                 waitpid(pid, &return_value, 0);
 545                 return;
 546         }
 547
 548 // Get the pid of the fork if inside the fork
 549         pid = getpid();
 550         BC_Signals::set_trap_hook(trap_hook, this);
 551         TheList::reset();
 552
 553         int socket_fd = this->socket_fd;
 554         int watchdog_timeout = client->boot_preferences->renderfarm_watchdog_timeout;
 555         if( watchdog_timeout > 0 )
 556                 init_client_keepalive(watchdog_timeout);
 557
 558 // Get command to run
 559         int command;
 560         lock("RenderFarmClientThread::run");
 561         get_command(socket_fd, &command);
 562         unlock();
 563
 564 //printf("RenderFarmClientThread::run command=%d\n", command);
 565
 566         switch(command)
 567         {
 568                 case RENDERFARM_TUNER:
 569                         do_tuner(socket_fd);
 570                         break;
 571                 case RENDERFARM_PACKAGES:
 572                         do_packages(socket_fd);
 573                         break;
 574         }
 575
 576         _exit(0);
 577 }
 578
 579
 580 void RenderFarmClientThread::init_client_keepalive(int timeout_secs)
 581 {
 582         keep_alive = new RenderFarmKeepalive(this);
 583         keep_alive->start();
 584         watchdog = new RenderFarmWatchdog(timeout_secs, 0, this);
 585         watchdog->start();
 586 }
 587
 588
 589
 590 void RenderFarmClientThread::do_tuner(int socket_fd)
 591 {
 592 // Currently only 1 tuner driver.  Maybe more someday.
 593 //      DVBTune server(this);
 594 //      server.main_loop();
 595 //      ::close(socket_fd);
 596 }
 597
 598
 599 void RenderFarmClientThread::do_packages(int socket_fd)
 600 {
 601         RenderPackage *package;
 602         Asset *default_asset;
 603         Preferences *preferences;
 604
 605
 606
 607         FarmPackageRenderer package_renderer(this, socket_fd);
 608         int result = 0;
 609
 610
 611
 612 //printf("RenderFarmClientThread::run 2\n");
 613 // Read settings
 614         preferences = new Preferences;
 615         default_asset = new Asset;
 616         package = new RenderPackage;
 617         edl = new EDL;
 618         edl->create_objects();
 619
 620 //printf("RenderFarmClientThread::run 3\n");
 621         read_preferences(socket_fd, preferences);
 622 //printf("RenderFarmClientThread::run 4\n");
 623         read_asset(socket_fd, default_asset);
 624 //printf("RenderFarmClientThread::run 5\n");
 625         read_edl(socket_fd, edl, preferences);
 626 //edl->dump();
 627 //printf("RenderFarmClientThread::run 6\n");
 628
 629         package_renderer.initialize(0, edl, preferences, default_asset);
 630
 631 // Read packages
 632         while(1)
 633         {
 634 //printf("RenderFarmClientThread::run 5\n");
 635                 result = read_package(socket_fd, package);
 636 //printf("RenderFarmClientThread::run 6 %d\n", result);
 637
 638
 639 // Finished list
 640                 if(result)
 641                 {
 642 //printf("RenderFarmClientThread::run 7\n");
 643
 644                         result = send_completion(socket_fd);
 645                         break;
 646                 }
 647
 648 //              Timer timer;
 649 //              timer.update();
 650
 651 // Error
 652                 if(package_renderer.render_package(package))
 653                 {
 654 //printf("RenderFarmClientThread::run 8\n");
 655                         result = send_completion(socket_fd);
 656                         break;
 657                 }
 658
 659
 660                 frames_per_second = package_renderer.frames_per_second;
 661 //              frames_per_second = (double)(package->video_end - package->video_start) /
 662 //                      ((double)timer.get_difference() / 1000);
 663
 664 //printf("RenderFarmClientThread::run 9\n");
 665
 666
 667
 668         }
 669
 670
 671 //printf("RenderFarmClientThread::run 9\n");
 672         default_asset->Garbage::remove_user();
 673 //printf("RenderFarmClientThread::run 10\n");
 674         edl->Garbage::remove_user();
 675         edl = 0;
 676 //printf("RenderFarmClientThread::run 11\n");
 677         delete preferences;
 678 printf(_("RenderFarmClientThread::run: Session finished.\n"));
 679 }
 680
 681 void RenderFarmClientThread::trap_hook(FILE *fp, void *vp)
 682 {
 683         RenderFarmClientThread *thread = (RenderFarmClientThread*)vp;
 684         fprintf(fp, "\nEDL:\n");
 685         if( thread->edl ) thread->edl->dump(fp);
 686 }
 687
 688
 689
 690 RenderFarmKeepalive::RenderFarmKeepalive(
 691         RenderFarmClientThread *client_thread)
 692  : Thread(1, 0, 0)
 693 {
 694         this->client_thread = client_thread;
 695         done = 0;
 696 }
 697
 698 RenderFarmKeepalive::~RenderFarmKeepalive()
 699 {
 700         done = 1;
 701         cancel();
 702         join();
 703 }
 704
 705 void RenderFarmKeepalive::run()
 706 {
 707         while(!done)
 708         {
 709                 enable_cancel();
 710                 sleep(5);
 711                 disable_cancel();
 712                 if( !done ) {
 713 //printf("RenderFarmKeepalive::run 1\n");
 714 // watchdog thread kills this if it gets stuck
 715                         client_thread->ping_server();
 716 //printf("RenderFarmKeepalive::run 10\n");
 717                 }
 718         }
 719 }
 720
 721
 722 FarmPackageRenderer::FarmPackageRenderer(RenderFarmClientThread *thread,
 723                 int socket_fd)
 724  : PackageRenderer()
 725 {
 726         this->thread = thread;
 727         this->socket_fd = socket_fd;
 728 }
 729
 730
 731 FarmPackageRenderer::~FarmPackageRenderer()
 732 {
 733 }
 734
 735
 736 int FarmPackageRenderer::get_result()
 737 {
 738         thread->lock("FarmPackageRenderer::get_result");
 739         thread->send_request_header(RENDERFARM_GET_RESULT,
 740                 0);
 741         unsigned char data[1];
 742         data[0] = 1;
 743         if(thread->read_socket((char*)data, 1) != 1)
 744         {
 745                 thread->unlock();
 746                 return 1;
 747         }
 748         thread->unlock();
 749         return data[0];
 750 }
 751
 752 void FarmPackageRenderer::set_result(int value)
 753 {
 754         thread->lock("FarmPackageRenderer::set_result");
 755         thread->send_request_header(RENDERFARM_SET_RESULT,
 756                 1);
 757         unsigned char data[1];
 758         data[0] = value;
 759         thread->write_socket((char*)data, 1);
 760         thread->unlock();
 761 }
 762
 763 void FarmPackageRenderer::set_progress(int64_t total_samples)
 764 {
 765         thread->lock("FarmPackageRenderer::set_progress");
 766         thread->send_request_header(RENDERFARM_PROGRESS,
 767                 8);
 768         unsigned char datagram[8];
 769         int i = 0;
 770         STORE_INT32(total_samples);
 771
 772
 773         int64_t fixed = (!EQUIV(frames_per_second, 0.0)) ?
 774                 (int64_t)(frames_per_second * 65536.0) : 0;
 775         STORE_INT32(fixed);
 776
 777
 778         thread->write_socket((char*)datagram, 8);
 779         thread->unlock();
 780 }
 781
 782 int FarmPackageRenderer::set_video_map(int64_t position, int value)
 783 {
 784         int result = 0;
 785         unsigned char datagram[8];
 786         char return_value[1];
 787         int i = 0;
 788
 789         thread->lock("FarmPackageRenderer::set_video_map");
 790         thread->send_request_header(RENDERFARM_SET_VMAP,
 791                 8);
 792         STORE_INT32(position);
 793         STORE_INT32(value);
 794         thread->write_socket((char*)datagram, 8);
 795
 796 // Get completion since the GUI may be locked for a long time.
 797         if(!thread->read_socket(return_value, 1))
 798         {
 799                 result = 1;
 800         }
 801
 802         thread->unlock();
 803         return result;
 804 }
 805
 806