guicast/bcbitmap.C

   1 #include "bcbitmap.h"
   2 #include "bcipc.h"
   3 #include "bcresources.h"
   4 #include "bcsignals.h"
   5 #include "bcwindow.h"
   6 #include "colormodels.h"
   7 #include "vframe.h"
   8
   9 #include <string.h>
  10 #include <unistd.h>
  11 #include <X11/extensions/Xvlib.h>
  12
  13
  14 BC_Bitmap::BC_Bitmap(BC_WindowBase *parent_window, unsigned char *png_data)
  15 {
  16 // Decompress data into a temporary vframe
  17         VFrame frame;
  18
  19         frame.read_png(png_data);
  20
  21 // Initialize the bitmap
  22         initialize(parent_window,
  23                 frame.get_w(),
  24                 frame.get_h(),
  25                 parent_window->get_color_model(),
  26                 0);
  27
  28 // Copy the vframe to the bitmap
  29         read_frame(&frame, 0, 0, w, h);
  30 }
  31
  32 BC_Bitmap::BC_Bitmap(BC_WindowBase *parent_window, VFrame *frame)
  33 {
  34 // Initialize the bitmap
  35         initialize(parent_window,
  36                 frame->get_w(),
  37                 frame->get_h(),
  38                 parent_window->get_color_model(),
  39                 0);
  40
  41 // Copy the vframe to the bitmap
  42         read_frame(frame, 0, 0, w, h);
  43 }
  44
  45 BC_Bitmap::BC_Bitmap(BC_WindowBase *parent_window,
  46         int w,
  47         int h,
  48         int color_model,
  49         int use_shm)
  50 {
  51         initialize(parent_window,
  52                 w,
  53                 h,
  54                 color_model,
  55                 use_shm ? parent_window->get_resources()->use_shm : 0);
  56 }
  57
  58 BC_Bitmap::~BC_Bitmap()
  59 {
  60         delete_data();
  61 }
  62
  63 int BC_Bitmap::initialize(BC_WindowBase *parent_window,
  64         int w,
  65         int h,
  66         int color_model,
  67         int use_shm)
  68 {
  69         this->parent_window = parent_window;
  70         this->top_level = parent_window->top_level;
  71         this->w = w;
  72         this->h = h;
  73         this->color_model = color_model;
  74         this->use_shm = use_shm ? parent_window->get_resources()->use_shm : 0;
  75         this->bg_color = parent_window->bg_color;
  76         ximage[0] = 0;
  77         xv_image[0] = 0;
  78         data[0] = 0;
  79         last_pixmap_used = 0;
  80         last_pixmap = 0;
  81         current_ringbuffer = 0;
  82 // Set ring buffers based on total memory used.
  83 // The program icon must use multiple buffers but larger bitmaps may not fit
  84 // in memory.
  85         int pixelsize = cmodel_calculate_pixelsize(color_model);
  86         int buffer_size = w * h * pixelsize;
  87
  88         if(buffer_size < 0x40000)
  89                 ring_buffers = 4;
  90         else
  91                 ring_buffers = 1;
  92
  93         allocate_data();
  94         return 0;
  95 }
  96
  97 int BC_Bitmap::match_params(int w, int h, int color_model, int use_shm)
  98 {
  99         if(this->w /* != */ < w ||
 100                 this->h /* != */ < h ||
 101                 this->color_model != color_model ||
 102                 this->use_shm != use_shm)
 103         {
 104                 delete_data();
 105                 initialize(parent_window, w, h, color_model, use_shm);
 106         }
 107
 108         return 0;
 109 }
 110
 111 int BC_Bitmap::params_match(int w, int h, int color_model, int use_shm)
 112 {
 113         int result = 0;
 114         if(this->w == w &&
 115                 this->h == h &&
 116                 this->color_model == color_model)
 117         {
 118                 if(use_shm == this->use_shm || use_shm == BC_INFINITY)
 119                         result = 1;
 120         }
 121
 122         return result;
 123 }
 124
 125
 126 int BC_Bitmap::allocate_data()
 127 {
 128         int want_row_pointers = 1;
 129
 130 // Shared memory available
 131     if(use_shm)
 132         {
 133                 switch(color_model)
 134                 {
 135 // Planar YUV.  Must use BC_WindowBase::accel_available before calling this.
 136                         case BC_YUV420P:
 137                         case BC_YUV422P:
 138 // Packed YUV
 139                         case BC_YUV422:
 140                                 ring_buffers = BITMAP_RING;
 141                                 xv_portid = top_level->xvideo_port_id;
 142 // Create the X Image
 143                                 xv_image[0] = XvShmCreateImage(top_level->display,
 144                                                         xv_portid,
 145                                                         cmodel_bc_to_x(color_model),
 146                                                         0,
 147                                                         w,
 148                                                         h,
 149                                                         &shm_info);
 150 // Create the shared memory
 151                                 shm_info.shmid = shmget(IPC_PRIVATE,
 152                                         xv_image[0]->data_size * ring_buffers + 4,
 153                                         IPC_CREAT | 0777);
 154                                 if(shm_info.shmid < 0) perror("BC_Bitmap::allocate_data shmget");
 155                                 data[0] = (unsigned char *)shmat(shm_info.shmid, NULL, 0);
 156 // setting ximage->data stops BadValue
 157                                 xv_image[0]->data = shm_info.shmaddr = (char*)data[0];
 158                                 shm_info.readOnly = 0;
 159
 160 // Get the real parameters
 161                                 w = xv_image[0]->width;
 162                                 h = xv_image[0]->height;
 163
 164 // Create remaining X Images
 165                                 for(int i = 1; i < ring_buffers; i++)
 166                                 {
 167                                         data[i] = data[0] + xv_image[0]->data_size * i;
 168                                         xv_image[i] = XvShmCreateImage(top_level->display,
 169                                                                 xv_portid,
 170                                                                 cmodel_bc_to_x(color_model),
 171                                                                 (char*)data[i],
 172                                                                 w,
 173                                                                 h,
 174                                                                 &shm_info);
 175                                         xv_image[i]->data = (char*)data[i];
 176                                 }
 177
 178                                 if(color_model == BC_YUV422)
 179                                 {
 180                                         bytes_per_line = w * 2;
 181                                         bits_per_pixel = 2;
 182                                         want_row_pointers = 1;
 183                                 }
 184                                 else
 185                                 {
 186                                         bytes_per_line = 0;
 187                                         bits_per_pixel = 0;
 188                                         want_row_pointers = 0;
 189                                 }
 190                                 break;
 191
 192                         default:
 193 // RGB
 194                                 ring_buffers = BITMAP_RING;
 195 // Create first X Image
 196                         ximage[0] = XShmCreateImage(top_level->display,
 197                                         top_level->vis,
 198                                         get_default_depth(),
 199                                         get_default_depth() == 1 ? XYBitmap : ZPixmap,
 200                                         (char*)NULL,
 201                                         &shm_info,
 202                                         w,
 203                                         h);
 204
 205 // Create shared memory
 206                                 shm_info.shmid = shmget(IPC_PRIVATE,
 207                                         h * ximage[0]->bytes_per_line * ring_buffers + 4,
 208                                         IPC_CREAT | 0777);
 209                                 if(shm_info.shmid < 0)
 210                                         perror("BC_Bitmap::allocate_data shmget");
 211                                 data[0] = (unsigned char *)shmat(shm_info.shmid, NULL, 0);
 212                                 ximage[0]->data = shm_info.shmaddr = (char*)data[0];  // setting ximage->data stops BadValue
 213                                 shm_info.readOnly = 0;
 214
 215 // Get the real parameters
 216                                 bits_per_pixel = ximage[0]->bits_per_pixel;
 217                                 bytes_per_line = ximage[0]->bytes_per_line;
 218
 219 // Create remaining X Images
 220                                 for(int i = 1; i < ring_buffers; i++)
 221                                 {
 222                                         data[i] = data[0] + h * ximage[0]->bytes_per_line * i;
 223                                         ximage[i] = XShmCreateImage(top_level->display,
 224                                                                                         top_level->vis,
 225                                                                                         get_default_depth(),
 226                                                                                         get_default_depth() == 1 ? XYBitmap : ZPixmap,
 227                                                                                         (char*)data[i],
 228                                                                                         &shm_info,
 229                                                                                         w,
 230                                                                                         h);
 231                                         ximage[i]->data = (char*)data[i];
 232 //printf("BC_Bitmap::allocate_data %p\n", ximage[i]);
 233                                 }
 234                                 break;
 235                 }
 236
 237                 if(!XShmAttach(top_level->display, &shm_info))
 238                 {
 239                         perror("BC_Bitmap::allocate_data XShmAttach");
 240                 }
 241
 242 // This causes it to automatically delete when the program exits.
 243                 shmctl(shm_info.shmid, IPC_RMID, 0);
 244         }
 245         else
 246 // Use unshared memory.
 247         {
 248                 ring_buffers = 1;
 249 // need to use bytes_per_line for some X servers
 250                 data[0] = 0;
 251
 252 // Use RGB frame
 253 //printf("BCBitmap::allocate_data 1\n");
 254                 ximage[0] = XCreateImage(top_level->display,
 255                                         top_level->vis,
 256                                         get_default_depth(),
 257                                         get_default_depth() == 1 ? XYBitmap : ZPixmap,
 258                                         0,
 259                                         (char*)data[0],
 260                                         w,
 261                                         h,
 262                                         8,
 263                                         0);
 264 //printf("BCBitmap::allocate_data 1 %d\n", h * ximage[0]->bytes_per_line + 4);
 265
 266                 data[0] = (unsigned char*)malloc(h * ximage[0]->bytes_per_line + 4);
 267 //printf("BCBitmap::allocate_data 2\n");
 268
 269                 XDestroyImage(ximage[0]);
 270 //printf("BCBitmap::allocate_data 1\n");
 271
 272                 ximage[0] = XCreateImage(top_level->display,
 273                                         top_level->vis,
 274                                         get_default_depth(),
 275                                         get_default_depth() == 1 ? XYBitmap : ZPixmap,
 276                                         0,
 277                                         (char*)data[0],
 278                                         w,
 279                                         h,
 280                                         8,
 281                                         0);
 282 //printf("BCBitmap::allocate_data 1\n");
 283 // This differs from the depth parameter of the top_level.
 284                 bits_per_pixel = ximage[0]->bits_per_pixel;
 285                 bytes_per_line = ximage[0]->bytes_per_line;
 286 //printf("BCBitmap::allocate_data 2\n");
 287         }
 288
 289 // Create row pointers
 290         if(want_row_pointers)
 291         {
 292 //printf("BC_Bitmap::allocate 1 %d %d %d %d\n", w, h, get_default_depth(), bytes_per_line);
 293                 for(int j = 0; j < ring_buffers; j++)
 294                 {
 295                         row_data[j] = new unsigned char*[h];
 296                         for(int i = 0; i < h; i++)
 297                         {
 298                                 row_data[j][i] = &data[j][i * bytes_per_line];
 299                         }
 300                 }
 301         }
 302         return 0;
 303 }
 304
 305 int BC_Bitmap::delete_data()
 306 {
 307         if(data[0])
 308         {
 309                 if(use_shm)
 310                 {
 311                         switch(color_model)
 312                         {
 313                                 case BC_YUV420P:
 314                                 case BC_YUV422P:
 315                                 case BC_YUV422:
 316 //printf("BC_Bitmap::delete_data 1\n");
 317                                         if(last_pixmap_used) XvStopVideo(top_level->display, xv_portid, last_pixmap);
 318                                         for(int i = 0; i < ring_buffers; i++)
 319                                         {
 320                                                 XFree(xv_image[i]);
 321                                         }
 322                                         XShmDetach(top_level->display, &shm_info);
 323                                         XvUngrabPort(top_level->display, xv_portid, CurrentTime);
 324
 325                                         shmdt(shm_info.shmaddr);
 326                                         shmctl(shm_info.shmid, IPC_RMID, 0);
 327                                         break;
 328
 329                                 default:
 330                                         for(int i = 0; i < ring_buffers; i++)
 331                                         {
 332                                                 XDestroyImage(ximage[i]);
 333                                                 delete [] row_data[i];
 334                                         }
 335                                         XShmDetach(top_level->display, &shm_info);
 336
 337                                         shmdt(shm_info.shmaddr);
 338                                         shmctl(shm_info.shmid, IPC_RMID, 0);
 339                                         break;
 340                         }
 341                 }
 342                 else
 343                 {
 344                         XDestroyImage(ximage[0]);
 345                         delete [] row_data[0];
 346                 }
 347
 348 // data is automatically freed by XDestroyImage
 349                 data[0] = 0;
 350                 last_pixmap_used = 0;
 351         }
 352         return 0;
 353 }
 354
 355 int BC_Bitmap::get_default_depth()
 356 {
 357         if(color_model == BC_TRANSPARENCY)
 358                 return 1;
 359         else
 360                 return top_level->default_depth;
 361 }
 362
 363
 364 int BC_Bitmap::set_bg_color(int color)
 365 {
 366         this->bg_color = color;
 367         return 0;
 368 }
 369
 370 int BC_Bitmap::invert()
 371 {
 372         for(int j = 0; j < ring_buffers; j++)
 373                 for(int k = 0; k < h; k++)
 374                         for(int i = 0; i < bytes_per_line; i++)
 375                         {
 376                                 row_data[j][k][i] ^= 0xff;
 377                         }
 378         return 0;
 379 }
 380
 381 int BC_Bitmap::write_drawable(Drawable &pixmap,
 382                                                         GC &gc,
 383                                                         int dest_x,
 384                                                         int dest_y,
 385                                                         int source_x,
 386                                                         int source_y,
 387                                                         int dest_w,
 388                                                         int dest_h,
 389                                                         int dont_wait)
 390 {
 391         return write_drawable(pixmap,
 392                 gc,
 393                 source_x,
 394                 source_y,
 395                 get_w() - source_x,
 396                 get_h() - source_y,
 397                 dest_x,
 398                 dest_y,
 399                 dest_w,
 400                 dest_h,
 401                 dont_wait);
 402 }
 403
 404 void BC_Bitmap::rewind_ring()
 405 {
 406         current_ringbuffer--;
 407         if(current_ringbuffer < 0) current_ringbuffer = ring_buffers - 1;
 408 }
 409
 410 int BC_Bitmap::write_drawable(Drawable &pixmap,
 411                 GC &gc,
 412                 int source_x,
 413                 int source_y,
 414                 int source_w,
 415                 int source_h,
 416                 int dest_x,
 417                 int dest_y,
 418                 int dest_w,
 419                 int dest_h,
 420                 int dont_wait)
 421 {
 422 //printf("BC_Bitmap::write_drawable 1 %p %d\n", this, current_ringbuffer);fflush(stdout);
 423     if(use_shm)
 424         {
 425                 if(dont_wait) XSync(top_level->display, False);
 426
 427                 if(hardware_scaling())
 428                 {
 429 // printf("BC_Bitmap::write_drawable %d %d %d %d -> %d %d %d %d\n", source_x,
 430 //                              source_y,
 431 //                              source_w,
 432 //                              source_h,
 433 //                              dest_x,
 434 //                              dest_y,
 435 //                              dest_w,
 436 //                              dest_h);
 437 //for(int i = 0; i < 1000; i++) xv_image[current_ringbuffer]->data[i] = 255;
 438 //printf("BC_Bitmap::write_drawable 2 %d %d %p %p\n", xv_portid,
 439 //      pixmap,
 440 //      gc,
 441 //      xv_image[current_ringbuffer]);
 442                         XvShmPutImage(top_level->display,
 443                                 xv_portid,
 444                                 pixmap,
 445                                 gc,
 446                                 xv_image[current_ringbuffer],
 447                                 source_x,
 448                                 source_y,
 449                                 source_w,
 450                                 source_h,
 451                                 dest_x,
 452                                 dest_y,
 453                                 dest_w,
 454                                 dest_h,
 455                                 False);
 456 // Need to pass these to the XvStopVideo
 457                         last_pixmap = pixmap;
 458                         last_pixmap_used = 1;
 459                 }
 460                 else
 461                 {
 462 // printf("BC_Bitmap::write_drawable %d %d %d %d -> %d %d %d %d\n", source_x,
 463 //                              source_y,
 464 //                              source_w,
 465 //                              source_h,
 466 //                              dest_x,
 467 //                              dest_y,
 468 //                              dest_w,
 469 //                              dest_h);
 470                 XShmPutImage(top_level->display,
 471                                 pixmap,
 472                                 gc,
 473                                 ximage[current_ringbuffer],
 474                                 source_x,
 475                                 source_y,
 476                                 dest_x,
 477                                 dest_y,
 478                                 dest_w,
 479                                 dest_h,
 480                                 False);
 481                 }
 482
 483 // Force the X server into processing all requests.
 484 // This allows the shared memory to be written to again.
 485                 if(!dont_wait) XSync(top_level->display, False);
 486 //TRACE("BC_Bitmap::write_drawable 5");
 487         }
 488     else
 489         {
 490         XPutImage(top_level->display,
 491                         pixmap,
 492                         gc,
 493                         ximage[current_ringbuffer],
 494                         source_x,
 495                         source_y,
 496                         dest_x,
 497                         dest_y,
 498                         dest_w,
 499                         dest_h);
 500         }
 501
 502 //printf("BC_Bitmap %d\n", current_ringbuffer);
 503         current_ringbuffer++;
 504         if(current_ringbuffer >= ring_buffers) current_ringbuffer = 0;
 505 //printf("BC_Bitmap::write_drawable 2\n");fflush(stdout);
 506         return 0;
 507 }
 508
 509
 510
 511
 512 // the bitmap must be wholly contained in the source during a GetImage
 513 int BC_Bitmap::read_drawable(Drawable &pixmap, int source_x, int source_y)
 514 {
 515         if(use_shm)
 516                 XShmGetImage(top_level->display, pixmap, ximage[current_ringbuffer], source_x, source_y, 0xffffffff);
 517         else
 518                 XGetSubImage(top_level->display, pixmap, source_x, source_y, w, h, 0xffffffff, ZPixmap, ximage[current_ringbuffer], 0, 0);
 519         return 0;
 520 }
 521
 522 // ============================ Decoding VFrames
 523
 524 int BC_Bitmap::read_frame(VFrame *frame,
 525         int x1,
 526         int y1,
 527         int x2,
 528         int y2)
 529 {
 530         return read_frame(frame,
 531                 0, 0, frame->get_w(), frame->get_h(),
 532                 x1, y1, x2 - x1, y2 - y1);
 533 }
 534
 535
 536 int BC_Bitmap::read_frame(VFrame *frame,
 537         int in_x,
 538         int in_y,
 539         int in_w,
 540         int in_h,
 541         int out_x,
 542         int out_y,
 543         int out_w,
 544         int out_h)
 545 {
 546         switch(color_model)
 547         {
 548 // Hardware accelerated bitmap
 549                 case BC_YUV420P:
 550                         if(frame->get_color_model() == color_model)
 551                         {
 552                                 memcpy(get_y_plane(), frame->get_y(), w * h);
 553                                 memcpy(get_u_plane(), frame->get_u(), w * h / 4);
 554                                 memcpy(get_v_plane(), frame->get_v(), w * h / 4);
 555                                 break;
 556                         }
 557
 558                 case BC_YUV422P:
 559                         if(frame->get_color_model() == color_model)
 560                         {
 561                                 memcpy(get_y_plane(), frame->get_y(), w * h);
 562                                 memcpy(get_u_plane(), frame->get_u(), w * h / 2);
 563                                 memcpy(get_v_plane(), frame->get_v(), w * h / 2);
 564                                 break;
 565                         }
 566
 567                 case BC_YUV422:
 568                         if(frame->get_color_model() == color_model)
 569                         {
 570                                 memcpy(get_data(), frame->get_data(), w * h + w * h);
 571                                 break;
 572                         }
 573
 574 // Software only
 575                 default:
 576 // printf("BC_Bitmap::read_frame %d -> %d %d %d %d %d -> %d %d %d %d\n",
 577 //                              frame->get_color_model(),
 578 //                              color_model,
 579 //                              in_x,
 580 //                              in_y,
 581 //                              in_w,
 582 //                              in_h,
 583 //                              out_x,
 584 //                              out_y,
 585 //                              out_w,
 586 //                              out_h);
 587 //if(color_model == 6 && frame->get_color_model() == 19)
 588 //printf("BC_Bitmap::read_frame 1 %d %d %d %d\n", frame->get_w(), frame->get_h(), get_w(), get_h());
 589                         cmodel_transfer(row_data[current_ringbuffer],
 590                                 frame->get_rows(),
 591                                 get_y_plane(),
 592                                 get_u_plane(),
 593                                 get_v_plane(),
 594                                 frame->get_y(),
 595                                 frame->get_u(),
 596                                 frame->get_v(),
 597                                 in_x,
 598                                 in_y,
 599                                 in_w,
 600                                 in_h,
 601                                 out_x,
 602                                 out_y,
 603                                 out_w,
 604                                 out_h,
 605                                 frame->get_color_model(),
 606                                 color_model,
 607                                 bg_color,
 608                                 frame->get_w(),
 609                                 w);
 610 // color model transfer_*_to_TRANSPARENCY don't care about endianness
 611 // so buffer bitswaped here if needed.
 612                                 if ((color_model == BC_TRANSPARENCY) && (!top_level->server_byte_order))
 613                                         transparency_bitswap();
 614
 615
 616 //if(color_model == 6 && frame->get_color_model() == 19)
 617 //printf("BC_Bitmap::read_frame 2\n");
 618                         break;
 619         }
 620
 621
 622         return 0;
 623 }
 624
 625 long BC_Bitmap::get_shm_id()
 626 {
 627         return shm_info.shmid;
 628 }
 629
 630 long BC_Bitmap::get_shm_size()
 631 {
 632         if(xv_image[0])
 633                 return xv_image[0]->data_size * ring_buffers;
 634         else
 635                 return h * ximage[0]->bytes_per_line;
 636 }
 637
 638 long BC_Bitmap::get_shm_offset()
 639 {
 640         if(xv_image[0])
 641                 return xv_image[0]->data_size * current_ringbuffer;
 642         else
 643         if(ximage[0])
 644                 return h * ximage[0]->bytes_per_line * current_ringbuffer;
 645         else
 646                 return 0;
 647 }
 648
 649 long BC_Bitmap::get_y_shm_offset()
 650 {
 651         if(xv_image[0])
 652                 return get_shm_offset() + xv_image[current_ringbuffer]->offsets[0];
 653         else
 654                 return 0;
 655 }
 656
 657 long BC_Bitmap::get_u_shm_offset()
 658 {
 659         if(xv_image[0])
 660                 return get_shm_offset() + xv_image[current_ringbuffer]->offsets[2];
 661         else
 662                 return 0;
 663 }
 664
 665 long BC_Bitmap::get_v_shm_offset()
 666 {
 667         if(xv_image[0])
 668                 return get_shm_offset() + xv_image[current_ringbuffer]->offsets[1];
 669         else
 670                 return 0;
 671 }
 672
 673 long BC_Bitmap::get_y_offset()
 674 {
 675         if(xv_image[0])
 676                 return xv_image[current_ringbuffer]->offsets[0];
 677         else
 678                 return 0;
 679 }
 680
 681 long BC_Bitmap::get_u_offset()
 682 {
 683         if(xv_image[0] && xv_image[current_ringbuffer]->num_planes > 1)
 684                 return xv_image[current_ringbuffer]->offsets[2];
 685         else
 686                 return 0;
 687 }
 688
 689 long BC_Bitmap::get_v_offset()
 690 {
 691         if(xv_image[0] && xv_image[current_ringbuffer]->num_planes > 1)
 692                 return xv_image[current_ringbuffer]->offsets[1];
 693         else
 694                 return 0;
 695 }
 696
 697
 698 unsigned char** BC_Bitmap::get_row_pointers()
 699 {
 700         return row_data[current_ringbuffer];
 701 }
 702
 703 int BC_Bitmap::get_bytes_per_line()
 704 {
 705         return bytes_per_line;
 706 }
 707 unsigned char* BC_Bitmap::get_data()
 708 {
 709 //printf("BC_Bitmap::get_data %d %p\n",current_ringbuffer , data[current_ringbuffer]);
 710         return data[current_ringbuffer];
 711 }
 712
 713 unsigned char* BC_Bitmap::get_y_plane()
 714 {
 715         if(color_model == BC_YUV420P ||
 716                 color_model == BC_YUV422P)
 717                 return data[current_ringbuffer] + xv_image[current_ringbuffer]->offsets[0];
 718         else
 719                 return 0;
 720 }
 721
 722 unsigned char* BC_Bitmap::get_v_plane()
 723 {
 724         if(color_model == BC_YUV420P ||
 725                 color_model == BC_YUV422P)
 726                 return data[current_ringbuffer] + xv_image[current_ringbuffer]->offsets[1];
 727         else
 728                 return 0;
 729 }
 730
 731 unsigned char* BC_Bitmap::get_u_plane()
 732 {
 733         if(color_model == BC_YUV420P ||
 734                 color_model == BC_YUV422P)
 735                 return data[current_ringbuffer] + xv_image[current_ringbuffer]->offsets[2];
 736         else
 737                 return 0;
 738 }
 739
 740 void BC_Bitmap::rewind_ringbuffer()
 741 {
 742         current_ringbuffer--;
 743         if(current_ringbuffer < 0) current_ringbuffer = ring_buffers - 1;
 744 }
 745
 746 int BC_Bitmap::hardware_scaling()
 747 {
 748         return (get_color_model() == BC_YUV420P ||
 749                 get_color_model() == BC_YUV422P ||
 750                 get_color_model() == BC_YUV422);
 751 }
 752
 753 int BC_Bitmap::get_w() { return w; }
 754
 755 int BC_Bitmap::get_h() { return h; }
 756
 757 char BC_Bitmap::byte_bitswap(char src) {
 758         int i;
 759         char dst;
 760
 761         dst = 0;
 762         if (src & 1) dst |= ((unsigned char)1 << 7);
 763         src = src >> 1;
 764         if (src & 1) dst |= ((unsigned char)1 << 6);
 765         src = src >> 1;
 766         if (src & 1) dst |= ((unsigned char)1 << 5);
 767         src = src >> 1;
 768         if (src & 1) dst |= ((unsigned char)1 << 4);
 769         src = src >> 1;
 770         if (src & 1) dst |= ((unsigned char)1 << 3);
 771         src = src >> 1;
 772         if (src & 1) dst |= ((unsigned char)1 << 2);
 773         src = src >> 1;
 774         if (src & 1) dst |= ((unsigned char)1 << 1);
 775         src = src >> 1;
 776         if (src & 1) dst |= ((unsigned char)1 << 0);
 777
 778         return(dst);
 779 }
 780
 781 void BC_Bitmap::transparency_bitswap() {
 782         unsigned char *buf;
 783         int i, width, height;
 784         int len;
 785
 786         buf = *row_data[current_ringbuffer];
 787
 788         width = w;
 789         height = h;
 790         if (width % 8)
 791                 width = width + 8 - (width % 8);
 792         len = width * height / 8;
 793
 794         for(i=0 ; i+8<=len ; i+=8){
 795                 buf[i+0] = byte_bitswap(buf[i+0]);
 796                 buf[i+1] = byte_bitswap(buf[i+1]);
 797                 buf[i+2] = byte_bitswap(buf[i+2]);
 798                 buf[i+3] = byte_bitswap(buf[i+3]);
 799                 buf[i+4] = byte_bitswap(buf[i+4]);
 800                 buf[i+5] = byte_bitswap(buf[i+5]);
 801                 buf[i+6] = byte_bitswap(buf[i+6]);
 802                 buf[i+7] = byte_bitswap(buf[i+7]);
 803         }
 804         for( ; i<len ; i++){
 805                 buf[i+0] = byte_bitswap(buf[i+0]);
 806         }
 807 }
 808
 809 int BC_Bitmap::get_color_model() { return color_model; }
 810
 811
 812