source/src/vm/scsi_cdrom.cpp

   1 /*
   2         Skelton for retropc emulator
   3
   4         Author : Takeda.Toshiya
   5         Date   : 2016.03.06-
   6
   7         [ SCSI CD-ROM drive ]
   8 */
   9
  10 #include "scsi_cdrom.h"
  11 #include "../fifo.h"
  12
  13 #define CDDA_OFF        0
  14 #define CDDA_PLAYING    1
  15 #define CDDA_PAUSED     2
  16
  17 // 0-99 is reserved for SCSI_DEV class
  18 #define EVENT_CDDA      100
  19
  20 void SCSI_CDROM::initialize()
  21 {
  22         SCSI_DEV::initialize();
  23         fio_img = new FILEIO();
  24
  25         if(44100 % emu->get_sound_rate() == 0) {
  26                 mix_loop_num = 44100 / emu->get_sound_rate();
  27         } else {
  28                 mix_loop_num = 0;
  29         }
  30         event_cdda = -1;
  31         cdda_status = CDDA_OFF;
  32 }
  33
  34 void SCSI_CDROM::release()
  35 {
  36         if(fio_img->IsOpened()) {
  37                 fio_img->Fclose();
  38         }
  39         delete fio_img;
  40         SCSI_DEV::release();
  41 }
  42
  43 void SCSI_CDROM::reset()
  44 {
  45         touch_sound();
  46         SCSI_DEV::reset();
  47         set_cdda_status(CDDA_OFF);
  48 }
  49
  50 uint32_t SCSI_CDROM::read_signal(int id)
  51 {
  52         switch(id) {
  53         case SIG_SCSI_CDROM_PLAYING:
  54                 return (cdda_status == CDDA_PLAYING && cdda_interrupt) ? 0xffffffff : 0;
  55
  56         case SIG_SCSI_CDROM_SAMPLE_L:
  57                 return (uint32_t)abs(cdda_sample_l);
  58
  59         case SIG_SCSI_CDROM_SAMPLE_R:
  60                 return (uint32_t)abs(cdda_sample_r);
  61         }
  62         return SCSI_DEV::read_signal(id);
  63 }
  64
  65 void SCSI_CDROM::event_callback(int event_id, int err)
  66 {
  67         switch (event_id) {
  68         case EVENT_CDDA:
  69                 // read 16bit 2ch samples in the cd-da buffer, called 44100 times/sec
  70                 cdda_sample_l = (int)(int16_t)(cdda_buffer[cdda_buffer_ptr + 0] + cdda_buffer[cdda_buffer_ptr + 1] * 0x100);
  71                 cdda_sample_r = (int)(int16_t)(cdda_buffer[cdda_buffer_ptr + 2] + cdda_buffer[cdda_buffer_ptr + 3] * 0x100);
  72
  73                 if((cdda_buffer_ptr += 4) % 2352 == 0) {
  74                         // one frame finished
  75                         if(++cdda_playing_frame == cdda_end_frame) {
  76                                 // reached to end frame
  77                                 if(cdda_repeat) {
  78                                         // reload buffer
  79                                         fio_img->Fseek(cdda_start_frame * 2352, FILEIO_SEEK_SET);
  80                                         fio_img->Fread(cdda_buffer, sizeof(cdda_buffer), 1);
  81                                         cdda_buffer_ptr = 0;
  82                                         cdda_playing_frame = cdda_start_frame;
  83                                 } else {
  84                                         // stop
  85                                         if(cdda_interrupt) {
  86                                                 write_signals(&outputs_done, 0xffffffff);
  87                                         }
  88                                         set_cdda_status(CDDA_OFF);
  89                                 }
  90                         } else if(cdda_buffer_ptr == array_length(cdda_buffer)) {
  91                                 // refresh buffer
  92                                 fio_img->Fread(cdda_buffer, sizeof(cdda_buffer), 1);
  93                                 cdda_buffer_ptr = 0;
  94                         }
  95                 }
  96                 break;
  97         default:
  98                 SCSI_DEV::event_callback(event_id, err);
  99                 break;
 100         }
 101 }
 102
 103 void SCSI_CDROM::set_cdda_status(uint8_t status)
 104 {
 105         if(status == CDDA_PLAYING) {
 106                 if(mix_loop_num == 0) {
 107                         if(event_cdda == -1) {
 108                                 register_event(this, EVENT_CDDA, 1000000.0 / 44100.0, true, &event_cdda);
 109                         }
 110                 }
 111                 if(cdda_status != CDDA_PLAYING) {
 112                         touch_sound();
 113                         set_realtime_render(this, true);
 114                 }
 115         } else {
 116                 if(event_cdda != -1) {
 117                         cancel_event(this, event_cdda);
 118                         event_cdda = -1;
 119                 }
 120                 if(cdda_status == CDDA_PLAYING) {
 121                         touch_sound();
 122                         set_realtime_render(this, false);
 123                 }
 124         }
 125         cdda_status = status;
 126 }
 127
 128 void SCSI_CDROM::reset_device()
 129 {
 130         set_cdda_status(CDDA_OFF);
 131         SCSI_DEV::reset_device();
 132 }
 133
 134 bool SCSI_CDROM::is_device_ready()
 135 {
 136         return is_disc_inserted();
 137 }
 138
 139 int SCSI_CDROM::get_command_length(int value)
 140 {
 141         switch(value) {
 142         case 0xd8:
 143         case 0xd9:
 144         case 0xda:
 145         case 0xdd:
 146         case 0xde:
 147                 return 10;
 148         }
 149         return SCSI_DEV::get_command_length(value);
 150 }
 151
 152 int SCSI_CDROM::get_track(uint32_t lba)
 153 {
 154         int track = 0;
 155
 156         for(int i = 0; i < track_num; i++) {
 157                 if(lba >= toc_table[i].index0) {
 158                         track = i;
 159                 } else {
 160                         break;
 161                 }
 162         }
 163         return track;
 164 }
 165
 166 double SCSI_CDROM::get_seek_time(uint32_t lba)
 167 {
 168         if(fio_img->IsOpened()) {
 169                 uint32_t cur_position = (int)fio_img->Ftell();
 170                 int distance = abs((int)(lba * physical_block_size) - (int)cur_position);
 171                 double ratio = (double)distance / 333000 / physical_block_size; // 333000: sectors in media
 172                 return max(10, (int)(400000 * 2 * ratio));
 173         } else {
 174                 return 400000; // 400msec
 175         }
 176 }
 177
 178 uint32_t lba_to_msf(uint32_t lba)
 179 {
 180         uint8_t m = lba / (60 * 75);
 181         lba -= m * (60 * 75);
 182         uint8_t s = lba / 75;
 183         uint8_t f = lba % 75;
 184
 185         return ((m / 10) << 20) | ((m % 10) << 16) | ((s / 10) << 12) | ((s % 10) << 8) | ((f / 10) << 4) | ((f % 10) << 0);
 186 }
 187
 188 uint32_t lba_to_msf_alt(uint32_t lba)
 189 {
 190         uint32_t ret = 0;
 191         ret |= ((lba / (60 * 75)) & 0xff) << 16;
 192         ret |= (((lba / 75) % 60) & 0xff) <<  8;
 193         ret |= ((lba % 75)        & 0xff) <<  0;
 194         return ret;
 195 }
 196
 197 void SCSI_CDROM::start_command()
 198 {
 199         touch_sound();
 200         switch(command[0]) {
 201         case SCSI_CMD_READ6:
 202                 seek_time = 10;//get_seek_time((command[1] & 0x1f) * 0x10000 + command[2] * 0x100 + command[3]);
 203                 set_cdda_status(CDDA_OFF);
 204                 break;
 205
 206         case SCSI_CMD_READ10:
 207         case SCSI_CMD_READ12:
 208                 seek_time = 10;//get_seek_time(command[2] * 0x1000000 + command[3] * 0x10000 + command[4] * 0x100 + command[5]);
 209                 set_cdda_status(CDDA_OFF);
 210                 break;
 211
 212         case 0xd8:
 213                 #ifdef _SCSI_DEBUG_LOG
 214                         this->out_debug_log(_T("[SCSI_DEV:ID=%d] Command: NEC Set Audio Playback Start Position\n"), scsi_id);
 215                 #endif
 216                 if(is_device_ready()) {
 217                         if(command[2] == 0 && command[3] == 0 && command[4] == 0) {
 218                                 // stop cd-da if all params are zero
 219                                 cdda_start_frame = 0;
 220                                 cdda_end_frame = toc_table[track_num].index0; // end of disc
 221                                 set_cdda_status(CDDA_OFF);
 222                         } else {
 223                                 switch(command[9] & 0xc0) {
 224                                 case 0x00:
 225                                         cdda_start_frame = (command[2] << 16) | (command[3] << 8) | command[4];
 226                                         break;
 227                                 case 0x40:
 228                                         {
 229                                                 uint8_t m = FROM_BCD(command[2]);
 230                                                 uint8_t s = FROM_BCD(command[3]);
 231                                                 uint8_t f = FROM_BCD(command[4]);
 232                                                 cdda_start_frame = f + 75 * (s + m * 60);
 233
 234                                                 // PCE tries to be clever here and set (start of track + track pregap size) to skip the pregap
 235                                                 // (I guess it wants the TOC to have the real start sector for data tracks and the start of the pregap for audio?)
 236                                                 int track =get_track(cdda_start_frame);
 237                                                 cdda_start_frame -= toc_table[track].pregap;
 238
 239                                                 if(cdda_start_frame < toc_table[track].index1) {
 240                                                         cdda_start_frame = toc_table[track].index1; // don't play pregap
 241                                                 } else if(cdda_start_frame > (max_logical_block_addr + 1)) {
 242                                                         cdda_start_frame = 0;
 243                                                 }
 244                                         }
 245                                         break;
 246                                 case 0x80:
 247                                         cdda_start_frame = toc_table[FROM_BCD(command[2]) - 1].index1;
 248                                         break;
 249                                 default:
 250                                         cdda_start_frame = 0;
 251                                         break;
 252                                 }
 253 //                              if(cdda_status == CDDA_PAUSED) {
 254 //                                      cdda_end_frame = toc_table[track_num].index0; // end of disc
 255 //                                      set_cdda_status(CDDA_OFF);
 256 //                              } else
 257                                 if((command[1] & 3) != 0) {
 258                                         cdda_end_frame = toc_table[track_num].index0; // end of disc
 259                                         set_cdda_status(CDDA_PLAYING);
 260                                 } else {
 261                                         cdda_end_frame = toc_table[get_track(cdda_start_frame) + 1].index1; // end of this track
 262                                         set_cdda_status(CDDA_PAUSED);
 263                                 }
 264                                 cdda_repeat = false;
 265                                 cdda_interrupt = ((command[1] & 3) == 2);
 266
 267                                 // read buffer
 268                                 double seek_time = get_seek_time(cdda_start_frame);
 269                                 fio_img->Fseek(cdda_start_frame * 2352, FILEIO_SEEK_SET);
 270                                 fio_img->Fread(cdda_buffer, sizeof(cdda_buffer), 1);
 271                                 cdda_buffer_ptr = 0;
 272                                 cdda_playing_frame = cdda_start_frame;
 273
 274                                 // change to status phase
 275                                 set_dat(SCSI_STATUS_GOOD);
 276                                 set_phase_delay(SCSI_PHASE_STATUS, seek_time);
 277                                 return;
 278                         }
 279                 }
 280                 // change to status phase
 281                 set_dat(is_device_ready() ? SCSI_STATUS_GOOD : SCSI_STATUS_CHKCOND);
 282                 set_phase_delay(SCSI_PHASE_STATUS, 10.0);
 283                 return;
 284
 285         case 0xd9:
 286                 #ifdef _SCSI_DEBUG_LOG
 287                         this->out_debug_log(_T("[SCSI_DEV:ID=%d] Command: NEC Set Audio Playback End Position\n"), scsi_id);
 288                 #endif
 289                 if(is_device_ready()) {
 290                         switch(command[9] & 0xc0) {
 291                         case 0x00:
 292                                 cdda_end_frame = (command[3] << 16) | (command[4] << 8) | command[5];
 293                                 break;
 294                         case 0x40:
 295                                 {
 296                                         uint8_t m = FROM_BCD(command[2]);
 297                                         uint8_t s = FROM_BCD(command[3]);
 298                                         uint8_t f = FROM_BCD(command[4]);
 299                                         cdda_end_frame = f + 75 * (s + m * 60);
 300
 301                                         // PCE tries to be clever here and set (start of track + track pregap size) to skip the pregap
 302                                         // (I guess it wants the TOC to have the real start sector for data tracks and the start of the pregap for audio?)
 303                                         int track =get_track(cdda_end_frame);
 304
 305                                         if(cdda_end_frame > toc_table[track].index1 && (cdda_end_frame - toc_table[track].pregap) <= toc_table[track].index1) {
 306                                                 cdda_end_frame = toc_table[track].index1;
 307                                         }
 308                                 }
 309                                 break;
 310                         case 0x80:
 311                                 cdda_end_frame = toc_table[FROM_BCD(command[2]) - 1].index1;
 312                                 break;
 313                         }
 314                         if((command[1] & 3) != 0) {
 315                                 set_cdda_status(CDDA_PLAYING);
 316                                 cdda_repeat = ((command[1] & 3) == 1);
 317                                 cdda_interrupt = ((command[1] & 3) == 2);
 318                         } else {
 319                                 set_cdda_status(CDDA_OFF);
 320                         }
 321                 }
 322                 // change to status phase
 323                 set_dat(is_device_ready() ? SCSI_STATUS_GOOD : SCSI_STATUS_CHKCOND);
 324                 set_phase_delay(SCSI_PHASE_STATUS, 10.0);
 325                 return;
 326
 327         case 0xda:
 328                 #ifdef _SCSI_DEBUG_LOG
 329                         this->out_debug_log(_T("[SCSI_DEV:ID=%d] Command: NEC Pause\n"), scsi_id);
 330                 #endif
 331                 if(is_device_ready()) {
 332                         if(cdda_status == CDDA_PLAYING) {
 333                                 set_cdda_status(CDDA_OFF);
 334                         }
 335                 }
 336                 // change to status phase
 337                 set_dat(is_device_ready() ? SCSI_STATUS_GOOD : SCSI_STATUS_CHKCOND);
 338                 set_phase_delay(SCSI_PHASE_STATUS, 10.0);
 339                 return;
 340
 341         case 0xdd:
 342                 #ifdef _SCSI_DEBUG_LOG
 343                         this->out_debug_log(_T("[SCSI_DEV:ID=%d] Command: NEC Read Sub Channel Q\n"), scsi_id);
 344                 #endif
 345                 if(is_device_ready()) {
 346                         // create track info
 347                         uint32_t frame = (cdda_status == CDDA_OFF) ? cdda_start_frame : cdda_playing_frame;
 348                         uint32_t msf_abs = lba_to_msf_alt(frame);
 349                         int track = get_track(frame);
 350                         uint32_t msf_rel = lba_to_msf_alt(frame - toc_table[track].index0);
 351                         buffer->clear();
 352                         buffer->write((cdda_status == CDDA_PLAYING) ? 0x00 : (cdda_status == CDDA_PAUSED) ? 0x02 : 0x03);
 353                         buffer->write(0x01 | (toc_table[track].is_audio ? 0x00 : 0x40));
 354                         buffer->write(TO_BCD(track + 1));               // Track
 355                         buffer->write(0x01);                            // Index
 356                         buffer->write(TO_BCD((msf_rel >> 16) & 0xff));  // M (relative)
 357                         buffer->write(TO_BCD((msf_rel >>  8) & 0xff));  // S (relative)
 358                         buffer->write(TO_BCD((msf_rel >>  0) & 0xff));  // F (relative)
 359                         buffer->write(TO_BCD((msf_abs >> 16) & 0xff));  // M (absolute)
 360                         buffer->write(TO_BCD((msf_abs >>  8) & 0xff));  // S (absolute)
 361                         buffer->write(TO_BCD((msf_abs >>  0) & 0xff));  // F (absolute)
 362                         // transfer length
 363                         remain = buffer->count();
 364                         // set first data
 365                         set_dat(buffer->read());
 366                         // change to data in phase
 367                         set_phase_delay(SCSI_PHASE_DATA_IN, 10.0);
 368                 } else {
 369                         // change to status phase
 370                         set_dat(is_device_ready() ? SCSI_STATUS_GOOD : SCSI_STATUS_CHKCOND);
 371                         set_phase_delay(SCSI_PHASE_STATUS, 10.0);
 372                 }
 373                 return;
 374
 375         case 0xde:
 376                 #ifdef _SCSI_DEBUG_LOG
 377                         this->out_debug_log(_T("[SCSI_DEV:ID=%d] Command: NEC Get Dir Info\n"), scsi_id);
 378                 #endif
 379                 if(is_device_ready()) {
 380                         buffer->clear();
 381                         switch(command[1]) {
 382                         case 0x00:      /* Get first and last track numbers */
 383                                 buffer->write(TO_BCD(1));
 384                                 buffer->write(TO_BCD(track_num));
 385                                 break;
 386                         case 0x01:      /* Get total disk size in MSF format */
 387                                 {
 388                                         uint32_t msf = lba_to_msf(toc_table[track_num].index0 + 150);
 389                                         buffer->write((msf >> 16) & 0xff);
 390                                         buffer->write((msf >>  8) & 0xff);
 391                                         buffer->write((msf >>  0) & 0xff);
 392                                 }
 393                                 break;
 394                         case 0x02:      /* Get track information */
 395                                 if(command[2] == 0xaa) {
 396                                         uint32_t msf = lba_to_msf(toc_table[track_num].index0 + 150);
 397                                         buffer->write((msf >> 16) & 0xff);
 398                                         buffer->write((msf >>  8) & 0xff);
 399                                         buffer->write((msf >>  0) & 0xff);
 400                                         buffer->write(0x04); // correct ?
 401                                 } else {
 402                                         int track = max(FROM_BCD(command[2]), 1);
 403                                         uint32_t frame = toc_table[track - 1].index0;
 404                                         // PCE wants the start sector for data tracks to *not* include the pregap
 405                                         if(!toc_table[track - 1].is_audio) {
 406                                                 frame += toc_table[track - 1].pregap;
 407                                         }
 408                                         uint32_t msf = lba_to_msf(toc_table[track - 1].index1 + 150);
 409                                         buffer->write((msf >> 16) & 0xff); // M
 410                                         buffer->write((msf >>  8) & 0xff); // S
 411                                         buffer->write((msf >>  0) & 0xff); // F
 412                                         buffer->write(toc_table[track - 1].is_audio ? 0x00 : 0x04);
 413                                 }
 414                                 break;
 415                         }
 416                         // transfer length
 417                         remain = buffer->count();
 418                         // set first data
 419                         set_dat(buffer->read());
 420                         // change to data in phase
 421                         set_phase_delay(SCSI_PHASE_DATA_IN, 10.0);
 422                 } else {
 423                         // change to status phase
 424                         set_dat(is_device_ready() ? SCSI_STATUS_GOOD : SCSI_STATUS_CHKCOND);
 425                         set_phase_delay(SCSI_PHASE_STATUS, 10.0);
 426                 }
 427                 return;
 428         }
 429
 430         // start standard command
 431         SCSI_DEV::start_command();
 432 }
 433
 434 void SCSI_CDROM::read_buffer(int length)
 435 {
 436         if(fio_img->IsOpened()) {
 437                 uint32_t offset = (uint32_t)(position % 2352);
 438
 439                 fio_img->Fseek((long)position, FILEIO_SEEK_SET);
 440                 while(length > 0) {
 441                         uint8_t tmp_buffer[SCSI_BUFFER_SIZE];
 442                         int tmp_length = min(length, (int)sizeof(tmp_buffer));
 443
 444                         fio_img->Fread(tmp_buffer, tmp_length, 1);
 445                         for(int i = 0; i < tmp_length && length > 0; i++) {
 446                                 if(offset >= 16 && offset < 16 + 2048) {
 447                                         int value = tmp_buffer[i];
 448                                         buffer->write(value);
 449                                         length--;
 450                                 }
 451                                 position++;
 452                                 offset = (offset + 1) % 2352;
 453                         }
 454                 }
 455         }
 456 }
 457
 458 int get_frames_from_msf(const char *string)
 459 {
 460         const char *ptr = string;
 461         int frames[3] = {0};
 462         int index = 0;
 463
 464         while(1) {
 465                 if(*ptr >= '0' && *ptr <= '9') {
 466                         frames[index] = frames[index] * 10 + (*ptr - '0');
 467                 } else if(*ptr == ':') {
 468                         if(++index == 3) {
 469                                 // abnormal data
 470                                 break;
 471                         }
 472                 } else if(*ptr == '\r' || *ptr == '\n' || *ptr == '\0') {
 473                         // end of line
 474                         break;
 475                 }
 476                 ptr++;
 477         }
 478         return (frames[0] * 60 + frames[1]) * 75 + frames[2]; // 75frames/sec
 479 }
 480
 481 int hexatoi(const char *string)
 482 {
 483         const char *ptr = string;
 484         int value = 0;
 485
 486         while(1) {
 487                 if(*ptr >= '0' && *ptr <= '9') {
 488                         value = value * 16 + (*ptr - '0');
 489                 } else if(*ptr >= 'a' && *ptr <= 'f') {
 490                         value = value * 16 + (*ptr - 'a' + 10);
 491                 } else if(*ptr >= 'A' && *ptr <= 'F') {
 492                         value = value * 16 + (*ptr - 'A' + 10);
 493                 } else if(*ptr == '\r' || *ptr == '\n' || *ptr == '\0') {
 494                         break;
 495                 }
 496                 ptr++;
 497         }
 498         return value;
 499 }
 500
 501 void SCSI_CDROM::open_disc(const _TCHAR* file_path)
 502 {
 503         _TCHAR img_file_path[_MAX_PATH];
 504
 505         close_disc();
 506
 507         if(check_file_extension(file_path, _T(".cue"))) {
 508                 // get image file name
 509                 my_stprintf_s(img_file_path, _MAX_PATH, _T("%s.img"), get_file_path_without_extensiton(file_path));
 510                 if(!FILEIO::IsFileExisting(img_file_path)) {
 511                         my_stprintf_s(img_file_path, _MAX_PATH, _T("%s.bin"), get_file_path_without_extensiton(file_path));
 512                 }
 513                 if(fio_img->Fopen(img_file_path, FILEIO_READ_BINARY)) {
 514                         // get image file size
 515                         if((max_logical_block_addr = fio_img->FileLength() / 2352) > 0) {
 516                                 max_logical_block_addr--;
 517                         }
 518                         if(max_logical_block_addr > 0) {
 519                                 // read cue file
 520                                 FILEIO* fio = new FILEIO();
 521                                 if(fio->Fopen(file_path, FILEIO_READ_BINARY)) {
 522                                         char line[1024], *ptr;
 523                                         int track = -1;
 524                                         while(fio->Fgets(line, 1024) != NULL) {
 525                                                 if(strstr(line, "FILE") != NULL) {
 526                                                         // do nothing
 527                                                 } else if((ptr = strstr(line, "TRACK")) != NULL) {
 528                                                         // "TRACK 01 AUDIO"
 529                                                         // "TRACK 02 MODE1/2352"
 530                                                         ptr += 6;
 531                                                         while(*ptr == ' ' || *ptr == 0x09) {
 532                                                                 ptr++;
 533                                                         }
 534                                                         if((track = atoi(ptr)) > 0) {
 535                                                                 if(track > track_num) {
 536                                                                         track_num = track;
 537                                                                 }
 538                                                                 toc_table[track - 1].is_audio = (strstr(line, "AUDIO") != NULL);
 539                                                         }
 540                                                 } else if((ptr = strstr(line, "PREGAP")) != NULL) {
 541                                                         // "PREGAP 00:02:00"
 542                                                         if(track > 0) {
 543                                                                 toc_table[track - 1].pregap = get_frames_from_msf(ptr + 7);
 544                                                         }
 545                                                 } else if((ptr = strstr(line, "INDEX")) != NULL) {
 546                                                         // "INDEX 01 00:00:00"
 547                                                         if(track > 0) {
 548                                                                 ptr += 6;
 549                                                                 while(*ptr == ' ' || *ptr == 0x09) {
 550                                                                         ptr++;
 551                                                                 }
 552                                                                 int num = atoi(ptr);
 553                                                                 while(*ptr >= '0' && *ptr <= '9') {
 554                                                                         ptr++;
 555                                                                 }
 556                                                                 if(num == 0) {
 557                                                                         toc_table[track - 1].index0 = get_frames_from_msf(ptr);
 558                                                                 } else if(num == 1) {
 559                                                                         toc_table[track - 1].index1 = get_frames_from_msf(ptr);
 560                                                                 }
 561                                                         }
 562                                                 }
 563                                         }
 564                                         if(track_num != 0) {
 565                                                 for(int i = 1; i < track_num; i++) {
 566                                                         if(toc_table[i].index0 == 0) {
 567                                                                 toc_table[i].index0 = toc_table[i].index1 - toc_table[i].pregap;
 568                                                         } else if(toc_table[i].pregap == 0) {
 569                                                                 toc_table[i].pregap = toc_table[i].index1 - toc_table[i].index0;
 570                                                         }
 571                                                 }
 572                                                 toc_table[0].index0 = toc_table[0].index1 = toc_table[0].pregap = 0;
 573                                                 toc_table[track_num].index0 = toc_table[track_num].index1 = max_logical_block_addr + 1;
 574                                         } else {
 575                                                 fio_img->Fclose();
 576                                         }
 577                                         fio->Fclose();
 578                                 }
 579                                 delete fio;
 580                         }
 581                 }
 582         } else if(check_file_extension(file_path, _T(".ccd"))) {
 583                 // get image file name
 584                 my_stprintf_s(img_file_path, _MAX_PATH, _T("%s.img"), get_file_path_without_extensiton(file_path));
 585                 if(fio_img->Fopen(img_file_path, FILEIO_READ_BINARY)) {
 586                         // get image file size
 587                         if((max_logical_block_addr = fio_img->FileLength() / 2352) > 0) {
 588                                 max_logical_block_addr--;
 589                         }
 590                         if(max_logical_block_addr > 0) {
 591                                 // read cue file
 592                                 FILEIO* fio = new FILEIO();
 593                                 if(fio->Fopen(file_path, FILEIO_READ_BINARY)) {
 594                                         char line[1024], *ptr;
 595                                         int track = -1;
 596                                         while(fio->Fgets(line, 1024) != NULL) {
 597                                                 if(strstr(line, "[Session ") != NULL) {
 598                                                         track = -1;
 599                                                 } else if((ptr = strstr(line, "Point=0x")) != NULL) {
 600                                                         if((track = hexatoi(ptr + 8)) > 0 && track < 0xa0) {
 601                                                                 if(track > track_num) {
 602                                                                         track_num = track;
 603                                                                 }
 604                                                         }
 605                                                 } else if((ptr = strstr(line, "Control=0x")) != NULL) {
 606                                                         if(track > 0 && track < 0xa0) {
 607                                                                 toc_table[track - 1].is_audio = (hexatoi(ptr + 10) != 4);
 608                                                         }
 609                                                 } else if((ptr = strstr(line, "ALBA=-")) != NULL) {
 610                                                         if(track > 0 && track < 0xa0) {
 611                                                                 toc_table[track - 1].pregap = atoi(ptr + 6);
 612                                                         }
 613                                                 } else if((ptr = strstr(line, "PLBA=")) != NULL) {
 614                                                         if(track > 0 && track < 0xa0) {
 615                                                                 toc_table[track - 1].index1 = atoi(ptr + 5);
 616                                                         }
 617                                                 }
 618                                         }
 619                                         if(track_num != 0) {
 620                                                 for(int i = 1; i < track_num; i++) {
 621                                                         toc_table[i].index0 = toc_table[i].index1 - toc_table[i].pregap;
 622                                                 }
 623                                                 toc_table[0].index0 = toc_table[0].index1 = toc_table[0].pregap = 0;
 624                                                 toc_table[track_num].index0 = toc_table[track_num].index1 = max_logical_block_addr + 1;
 625                                         } else {
 626                                                 fio_img->Fclose();
 627                                         }
 628                                         fio->Fclose();
 629                                 }
 630                                 delete fio;
 631                         }
 632                 }
 633         }
 634 #ifdef _SCSI_DEBUG_LOG
 635         if(is_disc_inserted()) {
 636                 for(int i = 0; i < track_num + 1; i++) {
 637                         uint32_t idx0_msf = lba_to_msf(toc_table[i].index0);
 638                         uint32_t idx1_msf = lba_to_msf(toc_table[i].index1);
 639                         uint32_t pgap_msf = lba_to_msf(toc_table[i].pregap);
 640                         this->out_debug_log(_T("Track%02d: Index0=%02x:%02x:%02x Index1=%02x:%02x:%02x PreGpap=%02x:%02x:%02x\n"), i + 1,
 641                         (idx0_msf >> 16) & 0xff, (idx0_msf >> 8) & 0xff, idx0_msf & 0xff,
 642                         (idx1_msf >> 16) & 0xff, (idx1_msf >> 8) & 0xff, idx1_msf & 0xff,
 643                         (pgap_msf >> 16) & 0xff, (pgap_msf >> 8) & 0xff, pgap_msf & 0xff);
 644                 }
 645         }
 646 #endif
 647 }
 648
 649 void SCSI_CDROM::close_disc()
 650 {
 651         if(fio_img->IsOpened()) {
 652                 fio_img->Fclose();
 653         }
 654         memset(toc_table, 0, sizeof(toc_table));
 655         track_num = 0;
 656         set_cdda_status(CDDA_OFF);
 657 }
 658
 659 bool SCSI_CDROM::is_disc_inserted()
 660 {
 661         return fio_img->IsOpened();
 662 }
 663
 664 void SCSI_CDROM::mix(int32_t* buffer, int cnt)
 665 {
 666         if(cdda_status == CDDA_PLAYING) {
 667                 if(mix_loop_num != 0) {
 668                         int tmp_l = 0, tmp_r = 0;
 669                         for(int i = 0; i < mix_loop_num; i++) {
 670                                 event_callback(EVENT_CDDA, 0);
 671                                 tmp_l += cdda_sample_l;
 672                                 tmp_r += cdda_sample_r;
 673                         }
 674                         cdda_sample_l = tmp_l / mix_loop_num;
 675                         cdda_sample_r = tmp_r / mix_loop_num;
 676                 }
 677                 int32_t val_l = apply_volume(apply_volume(cdda_sample_l, volume_m), volume_l);
 678                 int32_t val_r = apply_volume(apply_volume(cdda_sample_r, volume_m), volume_r);
 679
 680                 for(int i = 0; i < cnt; i++) {
 681                         *buffer++ += val_l; // L
 682                         *buffer++ += val_r; // R
 683                 }
 684         }
 685 }
 686
 687 void SCSI_CDROM::set_volume(int ch, int decibel_l, int decibel_r)
 688 {
 689         volume_l = decibel_to_volume(decibel_l);
 690         volume_r = decibel_to_volume(decibel_r);
 691 }
 692
 693 void SCSI_CDROM::set_volume(int volume)
 694 {
 695         volume_m = (int)(1024.0 * (max(0, min(100, volume)) / 100.0));
 696 }
 697
 698 #define STATE_VERSION   2
 699
 700 void SCSI_CDROM::save_state(FILEIO* state_fio)
 701 {
 702         state_fio->FputUint32(STATE_VERSION);
 703         state_fio->FputInt32(this_device_id);
 704
 705         state_fio->FputUint32(cdda_start_frame);
 706         state_fio->FputUint32(cdda_end_frame);
 707         state_fio->FputUint32(cdda_playing_frame);
 708         state_fio->FputUint8(cdda_status);
 709         state_fio->FputBool(cdda_repeat);
 710         state_fio->FputBool(cdda_interrupt);
 711         state_fio->Fwrite(cdda_buffer, sizeof(cdda_buffer), 1);
 712         state_fio->FputInt32(cdda_buffer_ptr);
 713         state_fio->FputInt32(cdda_sample_l);
 714         state_fio->FputInt32(cdda_sample_r);
 715         state_fio->FputInt32(event_cdda);
 716 //      state_fio->FputInt32(mix_loop_num);
 717         state_fio->FputInt32(volume_m);
 718         if(fio_img->IsOpened()) {
 719                 state_fio->FputUint32(fio_img->Ftell());
 720         } else {
 721                 state_fio->FputUint32(0);
 722         }
 723         SCSI_DEV::save_state(state_fio);
 724 }
 725
 726 bool SCSI_CDROM::load_state(FILEIO* state_fio)
 727 {
 728         if(state_fio->FgetUint32() != STATE_VERSION) {
 729                 return false;
 730         }
 731         if(state_fio->FgetInt32() != this_device_id) {
 732                 return false;
 733         }
 734         cdda_start_frame = state_fio->FgetUint32();
 735         cdda_end_frame = state_fio->FgetUint32();
 736         cdda_playing_frame = state_fio->FgetUint32();
 737         cdda_status = state_fio->FgetUint8();
 738         cdda_repeat = state_fio->FgetBool();
 739         cdda_interrupt = state_fio->FgetBool();
 740         state_fio->Fread(cdda_buffer, sizeof(cdda_buffer), 1);
 741         cdda_buffer_ptr = state_fio->FgetInt32();
 742         cdda_sample_l = state_fio->FgetInt32();
 743         cdda_sample_r = state_fio->FgetInt32();
 744         event_cdda = state_fio->FgetInt32();
 745 //      mix_loop_num = state_fio->FgetInt32();
 746         volume_m = state_fio->FgetInt32();
 747         uint32_t offset = state_fio->FgetUint32();
 748
 749         // post process
 750         if(fio_img->IsOpened()) {
 751                 fio_img->Fseek(offset, FILEIO_SEEK_SET);
 752         }
 753         return SCSI_DEV::load_state(state_fio);
 754 }
 755