guicast/vframe.C

   1 #include <png.h>
   2 #include <stdio.h>
   3 #include <string.h>
   4 #include <stdint.h>
   5
   6 #include "bchash.h"
   7 #include "bcpbuffer.h"
   8 #include "bcsignals.h"
   9 #include "bcsynchronous.h"
  10 #include "bctexture.h"
  11 #include "bcwindowbase.h"
  12 #include "clip.h"
  13 #include "colormodels.h"
  14 #include "vframe.h"
  15
  16 class PngReadFunction
  17 {
  18 public:
  19         static void png_read_function(png_structp png_ptr,
  20                    png_bytep data,
  21                                    png_size_t length)
  22         {
  23                 VFrame *frame = (VFrame*)png_get_io_ptr(png_ptr);
  24                 if(frame->image_size - frame->image_offset < length)
  25                         length = frame->image_size - frame->image_offset;
  26
  27                 memcpy(data, &frame->image[frame->image_offset], length);
  28                 frame->image_offset += length;
  29         };
  30 };
  31
  32
  33
  34
  35
  36
  37
  38 //static BCCounter counter;
  39
  40
  41 VFrame::VFrame(unsigned char *png_data)
  42 {
  43         reset_parameters(1);
  44         params = new BC_Hash;
  45         read_png(png_data);
  46 }
  47
  48 VFrame::VFrame(VFrame &frame)
  49 {
  50         reset_parameters(1);
  51         params = new BC_Hash;
  52         allocate_data(0, 0, 0, 0, frame.w, frame.h, frame.color_model, frame.bytes_per_line);
  53         memcpy(data, frame.data, bytes_per_line * h);
  54         copy_stacks(&frame);
  55 }
  56
  57 VFrame::VFrame(unsigned char *data,
  58         int w,
  59         int h,
  60         int color_model,
  61         long bytes_per_line)
  62 {
  63         reset_parameters(1);
  64         params = new BC_Hash;
  65         allocate_data(data, 0, 0, 0, w, h, color_model, bytes_per_line);
  66 }
  67
  68 VFrame::VFrame(unsigned char *data,
  69                 long y_offset,
  70                 long u_offset,
  71                 long v_offset,
  72                 int w,
  73                 int h,
  74                 int color_model,
  75                 long bytes_per_line)
  76 {
  77         reset_parameters(1);
  78         params = new BC_Hash;
  79         allocate_data(data,
  80                 y_offset,
  81                 u_offset,
  82                 v_offset,
  83                 w,
  84                 h,
  85                 color_model,
  86                 bytes_per_line);
  87 }
  88
  89 VFrame::VFrame()
  90 {
  91         reset_parameters(1);
  92         params = new BC_Hash;
  93         this->color_model = BC_COMPRESSED;
  94 }
  95
  96
  97
  98
  99
 100
 101
 102
 103
 104
 105
 106 VFrame::~VFrame()
 107 {
 108         clear_objects(1);
 109 // Delete effect stack
 110         prev_effects.remove_all_objects();
 111         next_effects.remove_all_objects();
 112         delete params;
 113 }
 114
 115 int VFrame::equivalent(VFrame *src, int test_stacks)
 116 {
 117         return (src->get_color_model() == get_color_model() &&
 118                 src->get_w() == get_w() &&
 119                 src->get_h() == get_h() &&
 120                 src->bytes_per_line == bytes_per_line &&
 121                 (!test_stacks || equal_stacks(src)));
 122 }
 123
 124 long VFrame::set_shm_offset(long offset)
 125 {
 126         shm_offset = offset;
 127         return 0;
 128 }
 129
 130 long VFrame::get_shm_offset()
 131 {
 132         return shm_offset;
 133 }
 134
 135 int VFrame::get_shared()
 136 {
 137         return shared;
 138 }
 139
 140 int VFrame::params_match(int w, int h, int color_model)
 141 {
 142         return (this->w == w &&
 143                 this->h == h &&
 144                 this->color_model == color_model);
 145 }
 146
 147
 148 int VFrame::reset_parameters(int do_opengl)
 149 {
 150         field2_offset = -1;
 151         shared = 0;
 152         shm_offset = 0;
 153         bytes_per_line = 0;
 154         data = 0;
 155         rows = 0;
 156         color_model = 0;
 157         compressed_allocated = 0;
 158         compressed_size = 0;   // Size of current image
 159         w = 0;
 160         h = 0;
 161         y = u = v = 0;
 162         y_offset = 0;
 163         u_offset = 0;
 164         v_offset = 0;
 165         sequence_number = -1;
 166         is_keyframe = 0;
 167
 168         if(do_opengl)
 169         {
 170 // By default, anything is going to be done in RAM
 171                 opengl_state = VFrame::RAM;
 172                 pbuffer = 0;
 173                 texture = 0;
 174         }
 175
 176         prev_effects.set_array_delete();
 177         next_effects.set_array_delete();
 178         return 0;
 179 }
 180
 181 int VFrame::clear_objects(int do_opengl)
 182 {
 183 // Remove texture
 184         if(do_opengl)
 185         {
 186                 delete texture;
 187                 texture = 0;
 188
 189                 delete pbuffer;
 190                 pbuffer = 0;
 191         }
 192
 193 // Delete data
 194         if(!shared)
 195         {
 196
 197 // Memory check
 198 //int size = calculate_data_size(this->w, this->h, this->bytes_per_line, this->color_model);
 199 //if(size > 2560 * 1920)
 200 UNBUFFER(data);
 201                 if(data) delete [] data;
 202                 data = 0;
 203         }
 204
 205 // Delete row pointers
 206         switch(color_model)
 207         {
 208                 case BC_COMPRESSED:
 209                 case BC_YUV420P:
 210                         break;
 211
 212                 default:
 213                         delete [] rows;
 214                         break;
 215         }
 216
 217
 218         return 0;
 219 }
 220
 221 int VFrame::get_field2_offset()
 222 {
 223         return field2_offset;
 224 }
 225
 226 int VFrame::set_field2_offset(int value)
 227 {
 228         this->field2_offset = value;
 229         return 0;
 230 }
 231
 232 void VFrame::set_keyframe(int value)
 233 {
 234         this->is_keyframe = value;
 235 }
 236
 237 int VFrame::get_keyframe()
 238 {
 239         return is_keyframe;
 240 }
 241
 242
 243 int VFrame::calculate_bytes_per_pixel(int color_model)
 244 {
 245         return cmodel_calculate_pixelsize(color_model);
 246 }
 247
 248 long VFrame::get_bytes_per_line()
 249 {
 250         return bytes_per_line;
 251 }
 252
 253 long VFrame::get_data_size()
 254 {
 255         return calculate_data_size(w, h, bytes_per_line, color_model) - 4;
 256 //      return h * bytes_per_line;
 257 }
 258
 259 long VFrame::calculate_data_size(int w, int h, int bytes_per_line, int color_model)
 260 {
 261         return cmodel_calculate_datasize(w, h, bytes_per_line, color_model);
 262         return 0;
 263 }
 264
 265 void VFrame::create_row_pointers()
 266 {
 267         switch(color_model)
 268         {
 269                 case BC_YUV420P:
 270                 case BC_YUV411P:
 271                         if(!this->v_offset)
 272                         {
 273                                 this->y_offset = 0;
 274                                 this->u_offset = w * h;
 275                                 this->v_offset = w * h + w * h / 4;
 276                         }
 277                         y = this->data + this->y_offset;
 278                         u = this->data + this->u_offset;
 279                         v = this->data + this->v_offset;
 280                         break;
 281
 282                 case BC_YUV422P:
 283                         if(!this->v_offset)
 284                         {
 285                                 this->y_offset = 0;
 286                                 this->u_offset = w * h;
 287                                 this->v_offset = w * h + w * h / 2;
 288                         }
 289                         y = this->data + this->y_offset;
 290                         u = this->data + this->u_offset;
 291                         v = this->data + this->v_offset;
 292                         break;
 293
 294                 default:
 295                         rows = new unsigned char*[h];
 296                         for(int i = 0; i < h; i++)
 297                         {
 298                                 rows[i] = &this->data[i * this->bytes_per_line];
 299                         }
 300                         break;
 301         }
 302 }
 303
 304 int VFrame::allocate_data(unsigned char *data,
 305         long y_offset,
 306         long u_offset,
 307         long v_offset,
 308         int w,
 309         int h,
 310         int color_model,
 311         long bytes_per_line)
 312 {
 313         this->w = w;
 314         this->h = h;
 315         this->color_model = color_model;
 316         this->bytes_per_pixel = calculate_bytes_per_pixel(color_model);
 317         this->y_offset = this->u_offset = this->v_offset = 0;
 318
 319         if(bytes_per_line >= 0)
 320         {
 321                 this->bytes_per_line = bytes_per_line;
 322         }
 323         else
 324                 this->bytes_per_line = this->bytes_per_pixel * w;
 325
 326 // Allocate data + padding for MMX
 327         if(data)
 328         {
 329                 shared = 1;
 330                 this->data = data;
 331                 this->y_offset = y_offset;
 332                 this->u_offset = u_offset;
 333                 this->v_offset = v_offset;
 334         }
 335         else
 336         {
 337                 shared = 0;
 338                 int size = calculate_data_size(this->w,
 339                         this->h,
 340                         this->bytes_per_line,
 341                         this->color_model);
 342                 this->data = new unsigned char[size];
 343
 344 // Memory check
 345 //if(size >= 720 * 480 * 3)
 346 //BUFFER2(this->data, "VFrame::allocate_data");
 347
 348 if(!this->data)
 349 printf("VFrame::allocate_data %dx%d: memory exhausted.\n", this->w, this->h);
 350
 351 //printf("VFrame::allocate_data %p %d %d\n", this, this->w, this->h);
 352 //if(size > 1000000) printf("VFrame::allocate_data %d\n", size);
 353         }
 354
 355 // Create row pointers
 356         create_row_pointers();
 357         return 0;
 358 }
 359
 360 void VFrame::set_memory(unsigned char *data,
 361                 long y_offset,
 362                 long u_offset,
 363                 long v_offset)
 364 {
 365         shared = 1;
 366         this->data = data;
 367         this->y_offset = y_offset;
 368         this->u_offset = u_offset;
 369         this->v_offset = v_offset;
 370         y = this->data + this->y_offset;
 371         u = this->data + this->u_offset;
 372         v = this->data + this->v_offset;
 373         create_row_pointers();
 374 }
 375
 376 void VFrame::set_compressed_memory(unsigned char *data,
 377         int data_size,
 378         int data_allocated)
 379 {
 380         clear_objects(0);
 381         shared = 1;
 382         this->data = data;
 383         this->compressed_allocated = data_allocated;
 384         this->compressed_size = data_size;
 385 }
 386
 387
 388 // Reallocate uncompressed buffer with or without alpha
 389 int VFrame::reallocate(unsigned char *data,
 390                 long y_offset,
 391                 long u_offset,
 392                 long v_offset,
 393                 int w,
 394                 int h,
 395                 int color_model,
 396                 long bytes_per_line)
 397 {
 398         clear_objects(0);
 399         reset_parameters(0);
 400         allocate_data(data,
 401                 y_offset,
 402                 u_offset,
 403                 v_offset,
 404                 w,
 405                 h,
 406                 color_model,
 407                 bytes_per_line);
 408         return 0;
 409 }
 410
 411 int VFrame::allocate_compressed_data(long bytes)
 412 {
 413         if(bytes < 1) return 1;
 414
 415 // Want to preserve original contents
 416         if(data && compressed_allocated < bytes)
 417         {
 418                 unsigned char *new_data = new unsigned char[bytes];
 419                 bcopy(data, new_data, compressed_allocated);
 420 UNBUFFER(data);
 421                 delete [] data;
 422                 data = new_data;
 423                 compressed_allocated = bytes;
 424         }
 425         else
 426         if(!data)
 427         {
 428                 data = new unsigned char[bytes];
 429                 compressed_allocated = bytes;
 430                 compressed_size = 0;
 431         }
 432
 433         return 0;
 434 }
 435
 436 int VFrame::read_png(unsigned char *data)
 437 {
 438         png_structp png_ptr = png_create_read_struct(PNG_LIBPNG_VER_STRING, 0, 0, 0);
 439         png_infop info_ptr = png_create_info_struct(png_ptr);
 440         int new_color_model;
 441
 442         image_offset = 0;
 443         image = data + 4;
 444         image_size = (((unsigned long)data[0]) << 24) |
 445                 (((unsigned long)data[1]) << 16) |
 446                 (((unsigned long)data[2]) << 8) |
 447                 (unsigned char)data[3];
 448         png_set_read_fn(png_ptr, this, PngReadFunction::png_read_function);
 449         png_read_info(png_ptr, info_ptr);
 450
 451         w = png_get_image_width(png_ptr, info_ptr);
 452         h = png_get_image_height(png_ptr, info_ptr);
 453
 454         int src_color_model = png_get_color_type(png_ptr, info_ptr);
 455         switch(src_color_model)
 456         {
 457                 case PNG_COLOR_TYPE_RGB:
 458                         new_color_model = BC_RGB888;
 459                         break;
 460
 461
 462                 case PNG_COLOR_TYPE_GRAY_ALPHA:
 463                 case PNG_COLOR_TYPE_RGB_ALPHA:
 464                 default:
 465                         new_color_model = BC_RGBA8888;
 466                         break;
 467         }
 468
 469         reallocate(NULL,
 470                 0,
 471                 0,
 472                 0,
 473                 w,
 474                 h,
 475                 new_color_model,
 476                 -1);
 477
 478         png_read_image(png_ptr, get_rows());
 479
 480
 481
 482         if(src_color_model == PNG_COLOR_TYPE_GRAY_ALPHA)
 483         {
 484                 for(int i = 0; i < get_h(); i++)
 485                 {
 486                         unsigned char *row = get_rows()[i];
 487                         unsigned char *out_ptr = row + get_w() * 4 - 4;
 488                         unsigned char *in_ptr = row + get_w() * 2 - 2;
 489
 490                         for(int j = get_w() - 1; j >= 0; j--)
 491                         {
 492                                 out_ptr[0] = in_ptr[0];
 493                                 out_ptr[1] = in_ptr[0];
 494                                 out_ptr[2] = in_ptr[0];
 495                                 out_ptr[3] = in_ptr[1];
 496                                 out_ptr -= 4;
 497                                 in_ptr -= 2;
 498                         }
 499                 }
 500         }
 501
 502         png_destroy_read_struct(&png_ptr, &info_ptr, NULL);
 503         return 0;
 504 }
 505
 506 unsigned char* VFrame::get_data()
 507 {
 508         return data;
 509 }
 510
 511 long VFrame::get_compressed_allocated()
 512 {
 513         return compressed_allocated;
 514 }
 515
 516 long VFrame::get_compressed_size()
 517 {
 518         return compressed_size;
 519 }
 520
 521 long VFrame::set_compressed_size(long size)
 522 {
 523         compressed_size = size;
 524         return 0;
 525 }
 526
 527 int VFrame::get_color_model()
 528 {
 529         return color_model;
 530 }
 531
 532
 533 int VFrame::equals(VFrame *frame)
 534 {
 535         if(frame->data == data)
 536                 return 1;
 537         else
 538                 return 0;
 539 }
 540
 541 #define ZERO_YUV(components, type, max) \
 542 { \
 543         for(int i = 0; i < h; i++) \
 544         { \
 545                 type *row = (type*)get_rows()[i]; \
 546                 for(int j = 0; j < w; j++) \
 547                 { \
 548                         row[j * components] = 0; \
 549                         row[j * components + 1] = (max + 1) / 2; \
 550                         row[j * components + 2] = (max + 1) / 2; \
 551                         if(components == 4) row[j * components + 3] = 0; \
 552                 } \
 553         } \
 554 }
 555
 556 int VFrame::clear_frame()
 557 {
 558         switch(color_model)
 559         {
 560                 case BC_COMPRESSED:
 561                         break;
 562
 563                 case BC_YUV420P:
 564                         bzero(data, h * w * 2);
 565                         break;
 566
 567                 case BC_YUV888:
 568                         ZERO_YUV(3, unsigned char, 0xff);
 569                         break;
 570
 571                 case BC_YUVA8888:
 572                         ZERO_YUV(4, unsigned char, 0xff);
 573                         break;
 574
 575                 case BC_YUV161616:
 576                         ZERO_YUV(3, uint16_t, 0xffff);
 577                         break;
 578
 579                 case BC_YUVA16161616:
 580                         ZERO_YUV(4, uint16_t, 0xffff);
 581                         break;
 582
 583                 default:
 584                         bzero(data, h * bytes_per_line);
 585                         break;
 586         }
 587         return 0;
 588 }
 589
 590 void VFrame::rotate90()
 591 {
 592 // Allocate new frame
 593         int new_w = h, new_h = w, new_bytes_per_line = bytes_per_pixel * new_w;
 594         unsigned char *new_data = new unsigned char[calculate_data_size(new_w, new_h, new_bytes_per_line, color_model)];
 595         unsigned char **new_rows = new unsigned char*[new_h];
 596         for(int i = 0; i < new_h; i++)
 597                 new_rows[i] = &new_data[new_bytes_per_line * i];
 598
 599 // Copy data
 600         for(int in_y = 0, out_x = new_w - 1; in_y < h; in_y++, out_x--)
 601         {
 602                 for(int in_x = 0, out_y = 0; in_x < w; in_x++, out_y++)
 603                 {
 604                         for(int k = 0; k < bytes_per_pixel; k++)
 605                         {
 606                                 new_rows[out_y][out_x * bytes_per_pixel + k] =
 607                                         rows[in_y][in_x * bytes_per_pixel + k];
 608                         }
 609                 }
 610         }
 611
 612 // Swap frames
 613         clear_objects(0);
 614         data = new_data;
 615         rows = new_rows;
 616         bytes_per_line = new_bytes_per_line;
 617         w = new_w;
 618         h = new_h;
 619 }
 620
 621 void VFrame::rotate270()
 622 {
 623 // Allocate new frame
 624         int new_w = h, new_h = w, new_bytes_per_line = bytes_per_pixel * new_w;
 625         unsigned char *new_data = new unsigned char[calculate_data_size(new_w, new_h, new_bytes_per_line, color_model)];
 626         unsigned char **new_rows = new unsigned char*[new_h];
 627         for(int i = 0; i < new_h; i++)
 628                 new_rows[i] = &new_data[new_bytes_per_line * i];
 629
 630 // Copy data
 631         for(int in_y = 0, out_x = 0; in_y < h; in_y++, out_x++)
 632         {
 633                 for(int in_x = 0, out_y = new_h - 1; in_x < w; in_x++, out_y--)
 634                 {
 635                         for(int k = 0; k < bytes_per_pixel; k++)
 636                         {
 637                                 new_rows[out_y][out_x * bytes_per_pixel + k] =
 638                                         rows[in_y][in_x * bytes_per_pixel + k];
 639                         }
 640                 }
 641         }
 642
 643 // Swap frames
 644         clear_objects(0);
 645         data = new_data;
 646         rows = new_rows;
 647         bytes_per_line = new_bytes_per_line;
 648         w = new_w;
 649         h = new_h;
 650 }
 651
 652 void VFrame::flip_vert()
 653 {
 654         unsigned char *temp = new unsigned char[bytes_per_line];
 655         for(int i = 0, j = h - 1; i < j; i++, j--)
 656         {
 657                 memcpy(temp, rows[j], bytes_per_line);
 658                 memcpy(rows[j], rows[i], bytes_per_line);
 659                 memcpy(rows[i], temp, bytes_per_line);
 660         }
 661         delete [] temp;
 662 }
 663
 664
 665
 666 int VFrame::copy_from(VFrame *frame)
 667 {
 668         int w = MIN(this->w, frame->get_w());
 669         int h = MIN(this->h, frame->get_h());
 670
 671
 672         switch(frame->color_model)
 673         {
 674                 case BC_COMPRESSED:
 675                         allocate_compressed_data(frame->compressed_size);
 676                         memcpy(data, frame->data, frame->compressed_size);
 677                         this->compressed_size = frame->compressed_size;
 678                         break;
 679
 680                 case BC_YUV420P:
 681 //printf("%d %d %p %p %p %p %p %p\n", w, h, get_y(), get_u(), get_v(), frame->get_y(), frame->get_u(), frame->get_v());
 682                         memcpy(get_y(), frame->get_y(), w * h);
 683                         memcpy(get_u(), frame->get_u(), w * h / 4);
 684                         memcpy(get_v(), frame->get_v(), w * h / 4);
 685                         break;
 686
 687                 case BC_YUV422P:
 688 //printf("%d %d %p %p %p %p %p %p\n", w, h, get_y(), get_u(), get_v(), frame->get_y(), frame->get_u(), frame->get_v());
 689                         memcpy(get_y(), frame->get_y(), w * h);
 690                         memcpy(get_u(), frame->get_u(), w * h / 2);
 691                         memcpy(get_v(), frame->get_v(), w * h / 2);
 692                         break;
 693
 694                 default:
 695 // printf("VFrame::copy_from %d\n", calculate_data_size(w,
 696 //                              h,
 697 //                              -1,
 698 //                              frame->color_model));
 699                         memcpy(data, frame->data, calculate_data_size(w,
 700                                 h,
 701                                 -1,
 702                                 frame->color_model));
 703                         break;
 704         }
 705
 706         return 0;
 707 }
 708
 709
 710 #define OVERLAY(type, max, components) \
 711 { \
 712         type **in_rows = (type**)src->get_rows(); \
 713         type **out_rows = (type**)get_rows(); \
 714         int in_w = src->get_w(); \
 715         int in_h = src->get_h(); \
 716  \
 717         for(int i = 0; i < in_h; i++) \
 718         { \
 719                 if(i + out_y1 >= 0 && i + out_y1 < h) \
 720                 { \
 721                         type *src_row = in_rows[i]; \
 722                         type *dst_row = out_rows[i + out_y1] + out_x1 * components; \
 723  \
 724                         for(int j = 0; j < in_w; j++) \
 725                         { \
 726                                 if(j + out_x1 >= 0 && j + out_x1 < w) \
 727                                 { \
 728                                         int opacity = src_row[3]; \
 729                                         int transparency = max - src_row[3]; \
 730                                         dst_row[0] = (transparency * dst_row[0] + opacity * src_row[0]) / max; \
 731                                         dst_row[1] = (transparency * dst_row[1] + opacity * src_row[1]) / max; \
 732                                         dst_row[2] = (transparency * dst_row[2] + opacity * src_row[2]) / max; \
 733                                         dst_row[3] = MAX(dst_row[3], src_row[3]); \
 734                                 } \
 735  \
 736                                 dst_row += components; \
 737                                 src_row += components; \
 738                         } \
 739                 } \
 740         } \
 741 }
 742
 743
 744 void VFrame::overlay(VFrame *src,
 745                 int out_x1,
 746                 int out_y1)
 747 {
 748         switch(get_color_model())
 749         {
 750                 case BC_RGBA8888:
 751                         OVERLAY(unsigned char, 0xff, 4);
 752                         break;
 753         }
 754 }
 755
 756
 757
 758 int VFrame::get_scale_tables(int *column_table, int *row_table,
 759                         int in_x1, int in_y1, int in_x2, int in_y2,
 760                         int out_x1, int out_y1, int out_x2, int out_y2)
 761 {
 762         int y_out, i;
 763         float w_in = in_x2 - in_x1;
 764         float h_in = in_y2 - in_y1;
 765         int w_out = out_x2 - out_x1;
 766         int h_out = out_y2 - out_y1;
 767
 768         float hscale = w_in / w_out;
 769         float vscale = h_in / h_out;
 770
 771         for(i = 0; i < w_out; i++)
 772         {
 773                 column_table[i] = (int)(hscale * i);
 774         }
 775
 776         for(i = 0; i < h_out; i++)
 777         {
 778                 row_table[i] = (int)(vscale * i) + in_y1;
 779         }
 780         return 0;
 781 }
 782
 783 int VFrame::get_bytes_per_pixel()
 784 {
 785         return bytes_per_pixel;
 786 }
 787
 788 unsigned char** VFrame::get_rows()
 789 {
 790         if(rows)
 791         {
 792                 return rows;
 793         }
 794         return 0;
 795 }
 796
 797 int VFrame::get_w()
 798 {
 799         return w;
 800 }
 801
 802 int VFrame::get_h()
 803 {
 804         return h;
 805 }
 806
 807 int VFrame::get_w_fixed()
 808 {
 809         return w - 1;
 810 }
 811
 812 int VFrame::get_h_fixed()
 813 {
 814         return h - 1;
 815 }
 816
 817 unsigned char* VFrame::get_y()
 818 {
 819         return y;
 820 }
 821
 822 unsigned char* VFrame::get_u()
 823 {
 824         return u;
 825 }
 826
 827 unsigned char* VFrame::get_v()
 828 {
 829         return v;
 830 }
 831
 832 void VFrame::set_number(long number)
 833 {
 834         sequence_number = number;
 835 }
 836
 837 long VFrame::get_number()
 838 {
 839         return sequence_number;
 840 }
 841
 842 void VFrame::push_prev_effect(char *name)
 843 {
 844         char *ptr;
 845         prev_effects.append(ptr = new char[strlen(name) + 1]);
 846         strcpy(ptr, name);
 847         if(prev_effects.total > MAX_STACK_ELEMENTS) prev_effects.remove_object(0);
 848 }
 849
 850 void VFrame::pop_prev_effect()
 851 {
 852         if(prev_effects.total)
 853                 prev_effects.remove_object(prev_effects.last());
 854 }
 855
 856 void VFrame::push_next_effect(char *name)
 857 {
 858         char *ptr;
 859         next_effects.append(ptr = new char[strlen(name) + 1]);
 860         strcpy(ptr, name);
 861         if(next_effects.total > MAX_STACK_ELEMENTS) next_effects.remove_object(0);
 862 }
 863
 864 void VFrame::pop_next_effect()
 865 {
 866         if(next_effects.total)
 867                 next_effects.remove_object(next_effects.last());
 868 }
 869
 870 char* VFrame::get_next_effect(int number)
 871 {
 872         if(!next_effects.total) return "";
 873         else
 874         if(number > next_effects.total - 1) number = next_effects.total - 1;
 875
 876         return next_effects.values[next_effects.total - number - 1];
 877 }
 878
 879 char* VFrame::get_prev_effect(int number)
 880 {
 881         if(!prev_effects.total) return "";
 882         else
 883         if(number > prev_effects.total - 1) number = prev_effects.total - 1;
 884
 885         return prev_effects.values[prev_effects.total - number - 1];
 886 }
 887
 888 BC_Hash* VFrame::get_params()
 889 {
 890         return params;
 891 }
 892
 893 void VFrame::clear_stacks()
 894 {
 895         next_effects.remove_all_objects();
 896         prev_effects.remove_all_objects();
 897         delete params;
 898         params = new BC_Hash;
 899 }
 900
 901 void VFrame::copy_params(VFrame *src)
 902 {
 903         params->copy_from(src->params);
 904 }
 905
 906 void VFrame::copy_stacks(VFrame *src)
 907 {
 908         clear_stacks();
 909
 910         for(int i = 0; i < src->next_effects.total; i++)
 911         {
 912                 char *ptr;
 913                 next_effects.append(ptr = new char[strlen(src->next_effects.values[i]) + 1]);
 914                 strcpy(ptr, src->next_effects.values[i]);
 915         }
 916         for(int i = 0; i < src->prev_effects.total; i++)
 917         {
 918                 char *ptr;
 919                 prev_effects.append(ptr = new char[strlen(src->prev_effects.values[i]) + 1]);
 920                 strcpy(ptr, src->prev_effects.values[i]);
 921         }
 922
 923         params->copy_from(src->params);
 924 }
 925
 926 int VFrame::equal_stacks(VFrame *src)
 927 {
 928         for(int i = 0; i < src->next_effects.total && i < next_effects.total; i++)
 929         {
 930                 if(strcmp(src->next_effects.values[i], next_effects.values[i])) return 0;
 931         }
 932         for(int i = 0; i < src->prev_effects.total && i < prev_effects.total; i++)
 933         {
 934                 if(strcmp(src->prev_effects.values[i], prev_effects.values[i])) return 0;
 935         }
 936         if(!params->equivalent(src->params)) return 0;
 937         return 1;
 938 }
 939
 940 void VFrame::dump_stacks()
 941 {
 942         printf("VFrame::dump_stacks\n");
 943         printf("        next_effects:\n");
 944         for(int i = next_effects.total - 1; i >= 0; i--)
 945                 printf("                %s\n", next_effects.values[i]);
 946         printf("        prev_effects:\n");
 947         for(int i = prev_effects.total - 1; i >= 0; i--)
 948                 printf("                %s\n", prev_effects.values[i]);
 949 }
 950
 951 void VFrame::dump_params()
 952 {
 953         params->dump();
 954 }
 955
 956
 957
 958 /*
 959 //      Local Variables:
 960 //      mode: C++
 961 //      c-file-style: "linux"
 962 //      End:
 963 */