cinelerra/device1394output.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 #ifdef HAVE_FIREWIRE
  23
  24
  25
  26 #include "audiodevice.h"
  27 #include "bccmodels.h"
  28 #include "condition.h"
  29 #include "device1394output.h"
  30 #include "mutex.h"
  31 #include "playbackconfig.h"
  32 #include "bctimer.h"
  33 #include "vframe.h"
  34 #include "videodevice.h"
  35
  36 #include <errno.h>
  37 #include <fcntl.h>
  38 #include <string.h>
  39 #include <sys/ioctl.h>
  40 #include <sys/mman.h>
  41 #include <unistd.h>
  42 #include <sys/utsname.h>
  43
  44
  45
  46
  47
  48 // Crazy DV internals
  49 #define CIP_N_NTSC 2436
  50 #define CIP_D_NTSC 38400
  51 #define CIP_N_PAL 1
  52 #define CIP_D_PAL 16
  53 #define OUTPUT_SAMPLES 262144
  54 #define BUFFER_TIMEOUT 500000
  55
  56
  57 Device1394Output::Device1394Output(AudioDevice *adevice)
  58  : Thread(1, 0, 0)
  59 {
  60         reset();
  61         this->adevice = adevice;
  62
  63         set_ioctls();
  64 }
  65
  66 Device1394Output::Device1394Output(VideoDevice *vdevice)
  67  : Thread(1, 0, 0)
  68 {
  69         reset();
  70         this->vdevice = vdevice;
  71
  72         set_ioctls();
  73 }
  74
  75 Device1394Output::~Device1394Output()
  76 {
  77         if(Thread::running())
  78         {
  79                 done = 1;
  80                 start_lock->unlock();
  81                 Thread::cancel();
  82         }
  83         Thread::join();
  84
  85         if(buffer)
  86         {
  87                 for(int i = 0; i < total_buffers; i++)
  88                 {
  89                         if(buffer[i]) delete [] buffer[i];
  90                 }
  91                 delete [] buffer;
  92                 delete [] buffer_size;
  93                 delete [] buffer_valid;
  94         }
  95
  96         if(audio_lock) delete audio_lock;
  97         if(video_lock) delete video_lock;
  98         if(start_lock) delete start_lock;
  99         if(audio_buffer) delete [] audio_buffer;
 100
 101         if(output_fd >= 0)
 102         {
 103         output_queue.buffer = (output_mmap.nb_buffers + output_queue.buffer - 1) % output_mmap.nb_buffers;
 104
 105                 if(get_dv1394())
 106                 {
 107                         if(ioctl(output_fd, DV1394_IOC_WAIT_FRAMES, status.init.n_frames - 1) < 0)
 108                         {
 109                                 fprintf(stderr,
 110                                         "Device1394Output::close_all: DV1394_WAIT_FRAMES %i: %s",
 111                                         output_mmap.nb_buffers,
 112                                         strerror(errno));
 113                         }
 114                         munmap(output_buffer, status.init.n_frames *
 115                                 (is_pal ? DV1394_PAL_FRAME_SIZE : DV1394_NTSC_FRAME_SIZE));
 116                         if(ioctl(output_fd, DV1394_IOC_SHUTDOWN, NULL) < 0)
 117                         {
 118                                 perror("Device1394Output::close_all: DV1394_SHUTDOWN");
 119                         }
 120                 }
 121                 else
 122                 {
 123                         if(ioctl(output_fd, video1394_talk_wait_buffer, &output_queue) < 0)
 124                         {
 125                                 fprintf(stderr,
 126                                         "Device1394::close_all: VIDEO1394_TALK_WAIT_BUFFER %p: %s",
 127                                         &output_queue, strerror(errno));
 128                         }
 129                         munmap(output_buffer, output_mmap.nb_buffers * output_mmap.buf_size);
 130
 131                         if(ioctl(output_fd, video1394_untalk_channel, &output_mmap.channel) < 0)
 132                         {
 133                                 perror("Device1394::close_all: VIDEO1394_UNTALK_CHANNEL");
 134                         }
 135                 }
 136
 137                 close(output_fd);
 138
 139 //              if(avc_handle)
 140 //                      raw1394_destroy_handle(avc_handle);
 141         }
 142
 143         if(temp_frame) delete temp_frame;
 144         if(temp_frame2) delete temp_frame2;
 145         if(video_encoder) dv_delete(video_encoder);
 146         if(position_presented) delete [] position_presented;
 147         if(audio_encoder) dv_delete(audio_encoder);
 148         if(buffer_lock) delete buffer_lock;
 149         if(position_lock) delete position_lock;
 150 }
 151
 152
 153 void Device1394Output::reset()
 154 {
 155         buffer = 0;
 156         buffer_size = 0;
 157         total_buffers = 0;
 158         current_inbuffer = 0;
 159         current_outbuffer = 0;
 160         done = 0;
 161         audio_lock = 0;
 162         video_lock = 0;
 163         start_lock = 0;
 164         buffer_lock = 0;
 165         position_lock = 0;
 166         video_encoder = 0;
 167         audio_encoder = 0;
 168         audio_buffer = 0;
 169         audio_samples = 0;
 170         output_fd = -1;
 171 //      avc_handle = 0;
 172         temp_frame = 0;
 173         temp_frame2 = 0;
 174         audio_position = 0;
 175         interrupted = 0;
 176         position_presented = 0;
 177         have_video = 0;
 178         adevice = 0;
 179         vdevice = 0;
 180         is_pal = 0;
 181 }
 182
 183 int Device1394Output::get_dv1394()
 184 {
 185         if(adevice) return adevice->out_config->driver == AUDIO_DV1394;
 186         if(vdevice) return vdevice->out_config->driver == PLAYBACK_DV1394;
 187         return 0;
 188 }
 189
 190 int Device1394Output::open(char *path,
 191         int port,
 192         int channel,
 193         int length,
 194         int channels,
 195         int bits,
 196         int samplerate,
 197         int syt)
 198 {
 199         this->channels = channels;
 200         this->bits = bits;
 201         this->samplerate = samplerate;
 202         this->total_buffers = length;
 203         if (get_dv1394())
 204         {
 205 // dv1394 syt is given in frames and limited to 2 or 3, default is 3
 206 // Needs to be accurate to calculate presentation time
 207                 if (syt < 2 || syt > 3)
 208                         syt = 3;
 209         }
 210         this->syt = syt;
 211
 212 // Set PAL mode based on frame height
 213         if(vdevice) is_pal = (vdevice->out_h == 576);
 214
 215     struct dv1394_init setup =
 216         {
 217        api_version: DV1394_API_VERSION,
 218        channel:     (unsigned int)channel,
 219            n_frames:    (unsigned int)length,
 220        format:      is_pal ? DV1394_PAL : DV1394_NTSC,
 221        cip_n:       0,
 222        cip_d:       0,
 223        syt_offset:  (unsigned int)syt
 224     };
 225
 226
 227
 228 //printf("Device1394::open_output 2 %s %d %d %d %d\n", path, port, channel, length, syt);
 229         if(output_fd < 0)
 230         {
 231         output_fd = ::open(path, O_RDWR);
 232
 233                 if(output_fd <= 0)
 234                 {
 235                         fprintf(stderr,
 236                                 "Device1394Output::open path=%s: %s\n",
 237                                 path,
 238                                 strerror(errno));
 239                         return 1;
 240                 }
 241                 else
 242                 {
 243                 output_mmap.channel = channel;
 244                 output_queue.channel = channel;
 245                 output_mmap.sync_tag = 0;
 246                 output_mmap.nb_buffers = total_buffers;
 247                 output_mmap.buf_size = 320 * 512;
 248                 output_mmap.packet_size = 512;
 249 // Shouldn't this be handled by the video1394 driver?
 250 // dvgrab originally used 19000
 251 // JVC DVL300 -> 30000
 252                 output_mmap.syt_offset = syt;
 253                 output_mmap.flags = VIDEO1394_VARIABLE_PACKET_SIZE;
 254
 255
 256
 257                         if(get_dv1394())
 258                         {
 259                                 if(ioctl(output_fd, DV1394_IOC_INIT, &setup) < 0)
 260                                 {
 261                                         perror("Device1394Output::open DV1394_INIT");
 262                                 }
 263
 264                                 if(ioctl(output_fd, DV1394_IOC_GET_STATUS, &status) < 0)
 265                                 {
 266                                         perror("Device1394Output::open DV1394_GET_STATUS");
 267                                 }
 268
 269                         output_buffer = (unsigned char*)mmap(0,
 270                         output_mmap.nb_buffers * (is_pal ? DV1394_PAL_FRAME_SIZE : DV1394_NTSC_FRAME_SIZE),
 271                         PROT_READ | PROT_WRITE,
 272                         MAP_SHARED,
 273                         output_fd,
 274                         0);
 275
 276                                 if(position_presented) delete [] position_presented;
 277                                 position_presented = new long[length];
 278                                 for (int i = 0; i < length; i++)
 279                                         position_presented[i] = 0;
 280                         }
 281                         else
 282                         {
 283                         if(ioctl(output_fd, video1394_talk_channel, &output_mmap) < 0)
 284                                 {
 285                         perror("Device1394Output::open VIDEO1394_TALK_CHANNEL:");
 286                         }
 287
 288                         output_buffer = (unsigned char*)mmap(0,
 289                                         output_mmap.nb_buffers * output_mmap.buf_size,
 290                         PROT_READ | PROT_WRITE,
 291                                         MAP_SHARED,
 292                                         output_fd,
 293                                         0);
 294                         }
 295
 296                 if(output_buffer == MAP_FAILED)
 297                         {
 298                 perror("Device1394Output::open mmap");
 299                 }
 300
 301                         unused_buffers = output_mmap.nb_buffers;
 302                 output_queue.buffer = 0;
 303                 output_queue.packet_sizes = packet_sizes;
 304                 continuity_counter = 0;
 305                 cip_counter = 0;
 306
 307 // Create buffers
 308                         buffer = new char*[total_buffers];
 309                         for(int i = 0; i < length; i++)
 310                                 buffer[i] = new char[get_dv1394() ?
 311                                         (is_pal ? DV1394_PAL_FRAME_SIZE : DV1394_NTSC_FRAME_SIZE) :
 312                                         DV_PAL_SIZE];
 313                         buffer_size = new int[total_buffers];
 314                         buffer_valid = new int[total_buffers];
 315                         bzero(buffer_size, sizeof(int) * total_buffers);
 316                         bzero(buffer_valid, sizeof(int) * total_buffers);
 317                         bzero(buffer, sizeof(char*) * total_buffers);
 318                         video_lock = new Condition(0, "Device1394Output::video_lock");
 319                         audio_lock = new Condition(0, "Device1394Output::audio_lock");
 320                         start_lock = new Condition(0, "Device1394Output::start_lock");
 321                         buffer_lock = new Mutex("Device1394Output::buffer_lock");
 322                         position_lock = new Mutex("Device1394Output::position_lock");
 323                         encoder = dv_new();
 324                         audio_buffer = new char[OUTPUT_SAMPLES * channels * bits / 8];
 325                         Thread::start();
 326         }
 327         }
 328         return 0;
 329 }
 330
 331 void Device1394Output::run()
 332 {
 333         unsigned char *output;
 334         char *out_buffer;
 335         int out_size;
 336
 337         Thread::enable_cancel();
 338         start_lock->lock("Device1394Output::run");
 339         Thread::disable_cancel();
 340
 341 //Timer timer;
 342 // Write buffers continuously
 343         while(!done)
 344         {
 345 // Get current buffer to play
 346                 if(done) return;
 347
 348                 buffer_lock->lock("Device1394Output::run 1");
 349
 350                 out_buffer = buffer[current_outbuffer];
 351                 out_size = buffer_size[current_outbuffer];
 352
 353
 354
 355
 356
 357 // No video.  Put in a fake frame for audio only
 358                 if(!have_video)
 359                 {
 360 #include "data/fake_ntsc_dv.h"
 361                         out_size = sizeof(fake_ntsc_dv) - 4;
 362                         out_buffer = (char*)fake_ntsc_dv + 4;
 363                 }
 364
 365
 366
 367
 368                 if(get_dv1394())
 369                 {
 370                         output = output_buffer +
 371                                 out_size *
 372                                 status.first_clear_frame;
 373                 }
 374                 else
 375                 {
 376                         output = output_buffer +
 377                                 output_queue.buffer *
 378                                 output_mmap.buf_size;
 379                 }
 380
 381
 382
 383
 384
 385
 386
 387
 388 // Got a buffer
 389                 if(out_buffer && out_size)
 390                 {
 391 // Calculate number of samples needed based on given pattern for
 392 // norm.
 393                         int samples_per_frame = 2048;
 394
 395 // Encode audio
 396                         if(audio_samples > samples_per_frame)
 397                         {
 398
 399                                 int samples_written = dv_write_audio(encoder,
 400                                         (unsigned char*)out_buffer,
 401                                         (unsigned char*)audio_buffer,
 402                                         samples_per_frame,
 403                                         channels,
 404                                         bits,
 405                                         samplerate,
 406                                         is_pal ? DV_PAL : DV_NTSC);
 407                                 memcpy(audio_buffer,
 408                                         audio_buffer + samples_written * bits * channels / 8,
 409                                         (audio_samples - samples_written) * bits * channels / 8);
 410                                 audio_samples -= samples_written;
 411                                 position_lock->lock("Device1394Output::run");
 412
 413                                 if (get_dv1394())
 414                                 {
 415 // When this frame is being uploaded to the 1394 device,
 416 // the frame actually playing on the device will be the one
 417 // uploaded syt frames before.
 418                                         position_presented[status.first_clear_frame] =
 419                                                 audio_position - syt * samples_per_frame;
 420                                         if (position_presented[status.first_clear_frame] < 0)
 421                                                 position_presented[status.first_clear_frame] = 0;
 422                                 }
 423
 424                                 audio_position += samples_written;
 425                                 position_lock->unlock();
 426
 427
 428                                 audio_lock->unlock();
 429                         }
 430
 431 // Copy from current buffer to mmap buffer with firewire encryption
 432                         if(get_dv1394())
 433                         {
 434                                 memcpy(output, out_buffer, out_size);
 435                         }
 436                         else
 437                         {
 438                                 encrypt((unsigned char*)output,
 439                                         (unsigned char*)out_buffer,
 440                                         out_size);
 441                         }
 442                         buffer_valid[current_outbuffer] = 0;
 443                 }
 444
 445 // Advance buffer number if possible
 446                 increment_counter(&current_outbuffer);
 447
 448 // Reuse same buffer next time
 449                 if(!buffer_valid[current_outbuffer])
 450                 {
 451                         decrement_counter(&current_outbuffer);
 452                 }
 453                 else
 454 // Wait for user to reach current buffer before unlocking any more.
 455                 {
 456                         video_lock->unlock();
 457                 }
 458
 459
 460                 buffer_lock->unlock();
 461 //printf("Device1394Output::run 100\n");
 462
 463
 464
 465                 if(out_size > 0)
 466                 {
 467
 468 // Write mmap to device
 469                         Thread::enable_cancel();
 470                         unused_buffers--;
 471
 472
 473                         if(get_dv1394())
 474                         {
 475                                 if(ioctl(output_fd, DV1394_IOC_SUBMIT_FRAMES, 1) < 0)
 476                                 {
 477                                         perror("Device1394Output::run DV1394_SUBMIT_FRAMES");
 478                                 }
 479                                 if(ioctl(output_fd, DV1394_IOC_WAIT_FRAMES, 1) < 0)
 480                                 {
 481                                         perror("Device1394Output::run DV1394_WAIT_FRAMES");
 482                                 }
 483                                 if(ioctl(output_fd, DV1394_IOC_GET_STATUS, &status) < 0)
 484                                 {
 485                                         perror("Device1394Output::run DV1394_GET_STATUS");
 486                                 }
 487                         }
 488                         else
 489                         {
 490                                 if(ioctl(output_fd, video1394_talk_queue_buffer, &output_queue) < 0)
 491                                 {
 492                                 perror("Device1394Output::run VIDEO1394_TALK_QUEUE_BUFFER");
 493                         }
 494                         }
 495
 496                 output_queue.buffer++;
 497                         if(output_queue.buffer >= output_mmap.nb_buffers)
 498                                 output_queue.buffer = 0;
 499
 500                         if(unused_buffers <= 0)
 501                         {
 502                                 if(!get_dv1394())
 503                                 {
 504                                 if(ioctl(output_fd, video1394_talk_wait_buffer, &output_queue) < 0)
 505                                         {
 506                                         perror("Device1394::run VIDEO1394_TALK_WAIT_BUFFER");
 507                                 }
 508                                 }
 509                                 unused_buffers++;
 510                         }
 511
 512
 513                         Thread::disable_cancel();
 514                 }
 515                 else
 516                 {
 517 //                      Thread::enable_cancel();
 518 //                      start_lock->lock();
 519 //                      Thread::disable_cancel();
 520                 }
 521
 522 //printf("Device1394Output::run %jd\n", timer.get_difference());
 523         }
 524 }
 525
 526
 527
 528 void Device1394Output::encrypt(unsigned char *output,
 529         unsigned char *data,
 530         int data_size)
 531 {
 532 // Encode in IEEE1394 video encryption
 533         int output_size = 320;
 534         int packets_per_frame = (is_pal ? 300 : 250);
 535         int min_packet_size = output_mmap.packet_size;
 536         unsigned long frame_size = packets_per_frame * 480;
 537         unsigned long vdata = 0;
 538         unsigned int *packet_sizes = this->packet_sizes;
 539
 540     if(cip_counter == 0)
 541         {
 542         if(!is_pal)
 543                 {
 544             cip_n = CIP_N_NTSC;
 545             cip_d = CIP_D_NTSC;
 546             f50_60 = 0x00;
 547         }
 548                 else
 549                 {
 550             cip_n = CIP_N_PAL;
 551             cip_d = CIP_D_PAL;
 552             f50_60 = 0x80;
 553         }
 554         cip_counter = cip_n;
 555     }
 556
 557
 558
 559
 560         for(int i = 0; i < output_size && vdata < frame_size; i++)
 561         {
 562         unsigned char *p = output;
 563         int want_sync = (cip_counter > cip_d);
 564
 565 /* Source node ID ! */
 566         *p++ = 0x01;
 567 /* Packet size in quadlets (480 / 4) - this stays the same even for empty packets */
 568         *p++ = 0x78;
 569         *p++ = 0x00;
 570         *p++ = continuity_counter;
 571
 572 /* const */
 573         *p++ = 0x80;
 574 /* high bit = 50/60 indicator */
 575         *p++ = f50_60;
 576
 577 /* timestamp - generated in driver */
 578         *p++ = 0xff;
 579 /* timestamp */
 580         *p++ = 0xff;
 581
 582 /* video data */
 583         if(!want_sync)
 584                 {
 585             continuity_counter++;
 586             cip_counter += cip_n;
 587
 588             memcpy(p, data + vdata, 480);
 589             p += 480;
 590             vdata += 480;
 591         }
 592         else
 593             cip_counter -= cip_d;
 594
 595         *packet_sizes++ = p - output;
 596         output += min_packet_size;
 597         }
 598         *packet_sizes++ = 0;
 599 }
 600
 601
 602
 603
 604 void Device1394Output::write_frame(VFrame *input)
 605 {
 606         VFrame *ptr = 0;
 607         int result = 0;
 608
 609 //printf("Device1394Output::write_frame 1\n");
 610
 611         if(output_fd <= 0) return;
 612         if(interrupted) return;
 613
 614 // Encode frame to DV
 615         if(input->get_color_model() != BC_COMPRESSED)
 616         {
 617                 if(!temp_frame) temp_frame = new VFrame;
 618                 if(!encoder) encoder = dv_new();
 619                 ptr = temp_frame;
 620
 621 // Exact resolution match.  Don't do colorspace conversion
 622                 if(input->get_color_model() == BC_YUV422 &&
 623                         input->get_w() == 720 &&
 624                         (input->get_h() == 480 ||
 625                         input->get_h() == 576))
 626                 {
 627                         int norm = is_pal ? DV_PAL : DV_NTSC;
 628                         int data_size = is_pal ? DV_PAL_SIZE : DV_NTSC_SIZE;
 629                         temp_frame->allocate_compressed_data(data_size);
 630                         temp_frame->set_compressed_size(data_size);
 631
 632                         dv_write_video(encoder,
 633                                 temp_frame->get_data(),
 634                                 input->get_rows(),
 635                                 BC_YUV422,
 636                                 norm);
 637                         ptr = temp_frame;
 638                 }
 639                 else
 640 // Convert resolution and color model before compressing
 641                 {
 642                         if(!temp_frame2)
 643                         {
 644                                 int h = input->get_h();
 645 // Default to NTSC if unknown
 646                                 if(h != 480 && h != 576) h = 480;
 647                                 temp_frame2 = new VFrame(720, h, BC_YUV422, 0);
 648
 649                         }
 650
 651                         int norm = is_pal ? DV_PAL : DV_NTSC;
 652                         int data_size = is_pal ? DV_PAL_SIZE : DV_NTSC_SIZE;
 653                         temp_frame->allocate_compressed_data(data_size);
 654                         temp_frame->set_compressed_size(data_size);
 655
 656
 657                         BC_CModels::transfer(temp_frame2->get_rows(), /* Leave NULL if non existent */
 658                                 input->get_rows(),
 659                                 temp_frame2->get_y(), /* Leave NULL if non existent */
 660                                 temp_frame2->get_u(),
 661                                 temp_frame2->get_v(),
 662                                 input->get_y(), /* Leave NULL if non existent */
 663                                 input->get_u(),
 664                                 input->get_v(),
 665                                 0,        /* Dimensions to capture from input frame */
 666                                 0,
 667                                 MIN(temp_frame2->get_w(), input->get_w()),
 668                                 MIN(temp_frame2->get_h(), input->get_h()),
 669                                 0,       /* Dimensions to project on output frame */
 670                                 0,
 671                                 MIN(temp_frame2->get_w(), input->get_w()),
 672                                 MIN(temp_frame2->get_h(), input->get_h()),
 673                                 input->get_color_model(),
 674                                 BC_YUV422,
 675                                 0,         /* When transfering BC_RGBA8888 to non-alpha this is the background color in 0xRRGGBB hex */
 676                                 input->get_bytes_per_line(),       /* For planar use the luma rowspan */
 677                                 temp_frame2->get_bytes_per_line());     /* For planar use the luma rowspan */
 678
 679                         dv_write_video(encoder,
 680                                 temp_frame->get_data(),
 681                                 temp_frame2->get_rows(),
 682                                 BC_YUV422,
 683                                 norm);
 684
 685
 686
 687                         ptr = temp_frame;
 688                 }
 689         }
 690         else
 691                 ptr = input;
 692
 693
 694
 695
 696
 697
 698
 699
 700
 701
 702
 703 // Take over buffer table
 704         buffer_lock->lock("Device1394Output::write_frame 1");
 705         have_video = 1;
 706 // Wait for buffer to become available with timeout
 707         while(buffer_valid[current_inbuffer] && !result && !interrupted)
 708         {
 709                 buffer_lock->unlock();
 710                 result = video_lock->timed_lock(BUFFER_TIMEOUT);
 711                 buffer_lock->lock("Device1394Output::write_frame 2");
 712         }
 713
 714
 715
 716 // Write buffer if there's room
 717         if(!buffer_valid[current_inbuffer])
 718         {
 719                 if(!buffer[current_inbuffer])
 720                 {
 721                         buffer[current_inbuffer] = new char[ptr->get_compressed_size()];
 722                         buffer_size[current_inbuffer] = ptr->get_compressed_size();
 723                 }
 724                 memcpy(buffer[current_inbuffer], ptr->get_data(), ptr->get_compressed_size());
 725                 buffer_valid[current_inbuffer] = 1;
 726                 increment_counter(&current_inbuffer);
 727         }
 728         else
 729 // Ignore it if there isn't room.
 730         {
 731                 ;
 732         }
 733
 734         buffer_lock->unlock();
 735         start_lock->unlock();
 736 //printf("Device1394Output::write_frame 100\n");
 737 }
 738
 739 void Device1394Output::write_samples(char *data, int samples)
 740 {
 741 //printf("Device1394Output::write_samples 1\n");
 742         int result = 0;
 743         //int timeout = (samples * 1000000LL * 2)/ samplerate;
 744         if(interrupted) return;
 745
 746 //printf("Device1394Output::write_samples 2\n");
 747
 748 // Check for maximum sample count exceeded
 749         if(samples > OUTPUT_SAMPLES)
 750         {
 751                 printf("Device1394Output::write_samples samples=%d > OUTPUT_SAMPLES=%d\n",
 752                         samples,
 753                         OUTPUT_SAMPLES);
 754                 return;
 755         }
 756
 757 //printf("Device1394Output::write_samples 3\n");
 758 // Take over buffer table
 759         buffer_lock->lock("Device1394Output::write_samples 1");
 760 // Wait for buffer to become available with timeout
 761         while(audio_samples > OUTPUT_SAMPLES - samples && !result && !interrupted)
 762         {
 763                 buffer_lock->unlock();
 764                 result = audio_lock->timed_lock(BUFFER_TIMEOUT);
 765                 buffer_lock->lock("Device1394Output::write_samples 2");
 766         }
 767
 768         if(!interrupted && audio_samples <= OUTPUT_SAMPLES - samples)
 769         {
 770 //printf("Device1394Output::write_samples 4 %d\n", audio_samples);
 771                 memcpy(audio_buffer + audio_samples * channels * bits / 8,
 772                         data,
 773                         samples * channels * bits / 8);
 774                 audio_samples += samples;
 775         }
 776         buffer_lock->unlock();
 777         start_lock->unlock();
 778 //printf("Device1394Output::write_samples 100\n");
 779 }
 780
 781 long Device1394Output::get_audio_position()
 782 {
 783         position_lock->lock("Device1394Output::get_audio_position");
 784         long result = audio_position;
 785         if (get_dv1394())
 786         {
 787 // Take delay between placing in buffer and presentation
 788 // on device into account for dv1394
 789                 result = position_presented[status.active_frame];
 790         }
 791         position_lock->unlock();
 792         return result;
 793 }
 794
 795 void Device1394Output::interrupt()
 796 {
 797         interrupted = 1;
 798 // Break write_samples out of a lock
 799         video_lock->unlock();
 800         audio_lock->unlock();
 801 // Playback should stop when the object is deleted.
 802 }
 803
 804 void Device1394Output::flush()
 805 {
 806
 807 }
 808
 809 void Device1394Output::increment_counter(int *counter)
 810 {
 811         (*counter)++;
 812         if(*counter >= total_buffers) *counter = 0;
 813 }
 814
 815 void Device1394Output::decrement_counter(int *counter)
 816 {
 817         (*counter)--;
 818         if(*counter < 0) *counter = total_buffers - 1;
 819 }
 820
 821 void Device1394Output::set_ioctls()
 822 {
 823         // It would make sense to simply change the file that is included in
 824         // order to change the IOCTLs, but it isn't reasonable to think that
 825         // people will rebuild their software every time the update their
 826         // kernel, hence this fix.
 827
 828         struct utsname buf;
 829
 830         // Get the kernel version so we can set the right ioctls
 831         uname(&buf);
 832
 833         char *ptr = strchr(buf.release, '.');
 834         int major = 2;
 835         int minor = 6;
 836         int point = 7;
 837         if(ptr)
 838         {
 839                 *ptr++ = 0;
 840                 major = atoi(buf.release);
 841                 char *ptr2 = strchr(ptr, '.');
 842                 if(ptr2)
 843                 {
 844                         *ptr2++ = 0;
 845                         minor = atoi(ptr);
 846                         point = atoi(ptr2);
 847                 }
 848         }
 849
 850         if( (major >= 2 && minor >= 6 && point >= 0) ||
 851             (major >= 2 && minor >= 4 && point >= 23) )
 852         {
 853                 // video1394
 854                 video1394_listen_channel = VIDEO1394_IOC_LISTEN_CHANNEL;
 855                 video1394_unlisten_channel = VIDEO1394_IOC_UNLISTEN_CHANNEL;
 856                 video1394_listen_queue_buffer = VIDEO1394_IOC_LISTEN_QUEUE_BUFFER;
 857                 video1394_listen_wait_buffer = VIDEO1394_IOC_LISTEN_WAIT_BUFFER;
 858                 video1394_talk_channel = VIDEO1394_IOC_TALK_CHANNEL;
 859                 video1394_untalk_channel = VIDEO1394_IOC_UNTALK_CHANNEL;
 860                 video1394_talk_queue_buffer = VIDEO1394_IOC_TALK_QUEUE_BUFFER;
 861                 video1394_talk_wait_buffer = VIDEO1394_IOC_TALK_WAIT_BUFFER;
 862                 video1394_listen_poll_buffer = VIDEO1394_IOC_LISTEN_POLL_BUFFER;
 863
 864                 // raw1394
 865                 // Nothing uses this right now, so I didn't include it.
 866         }
 867         else     // we are using an older kernel
 868         {
 869       // video1394
 870       video1394_listen_channel = VIDEO1394_LISTEN_CHANNEL;
 871       video1394_unlisten_channel = VIDEO1394_UNLISTEN_CHANNEL;
 872       video1394_listen_queue_buffer = VIDEO1394_LISTEN_QUEUE_BUFFER;
 873       video1394_listen_wait_buffer = VIDEO1394_LISTEN_WAIT_BUFFER;
 874       video1394_talk_channel = VIDEO1394_TALK_CHANNEL;
 875       video1394_untalk_channel = VIDEO1394_UNTALK_CHANNEL;
 876       video1394_talk_queue_buffer = VIDEO1394_TALK_QUEUE_BUFFER;
 877       video1394_talk_wait_buffer = VIDEO1394_TALK_WAIT_BUFFER;
 878       video1394_listen_poll_buffer = VIDEO1394_LISTEN_POLL_BUFFER;
 879         }
 880 }
 881
 882
 883
 884
 885
 886
 887
 888
 889
 890
 891
 892
 893 #endif // HAVE_FIREWIRE
 894
 895
 896
 897
 898
 899