vmcmd.c

linux下的MPEG1

  }
}

static void print_linksub_instruction(command_t* command) {
  uint32_t linkop = vm_getbits(command, 7, 8);
  uint32_t button = vm_getbits(command, 15, 6);
  
  if(linkop < sizeof(link_table)/sizeof(char *) && link_table[linkop] != NULL)
    fprintf(MSG_OUT, "%s (button %" PRIu8 ")", link_table[linkop], button);
  else
    fprintf(MSG_OUT, "WARNING: Unknown linksub instruction (%i)", linkop);
}

static void print_link_instruction(command_t* command, int optional) {
  uint8_t op = vm_getbits(command, 51, 4);
  
  if(optional && op)
    fprintf(MSG_OUT, ", ");
  
  switch(op) {
    case 0:
      if(!optional)
      fprintf(MSG_OUT, "WARNING: NOP (link)!");
      break;
    case 1:
      print_linksub_instruction(command);
      break;
    case 4:
      fprintf(MSG_OUT, "LinkPGCN %" PRIu16, vm_getbits(command, 14, 15));
      break;
    case 5:
      fprintf(MSG_OUT, "LinkPTT %" PRIu16 " (button %" PRIu8 ")", 
	      vm_getbits(command, 9, 10), vm_getbits(command, 15, 6));
      break;
    case 6:
      fprintf(MSG_OUT, "LinkPGN %" PRIu8 " (button %" PRIu8 ")", 
	      vm_getbits(command, 6, 7), vm_getbits(command, 15, 6));
      break;
    case 7:
      fprintf(MSG_OUT, "LinkCN %" PRIu8 " (button %" PRIu8 ")", 
	      vm_getbits(command, 7, 8), vm_getbits(command, 15, 6));
      break;
    default:
      fprintf(MSG_OUT, "WARNING: Unknown link instruction");
  }
}

static void print_jump_instruction(command_t* command) {
  switch(vm_getbits(command, 51, 4)) {
    case 1:
      fprintf(MSG_OUT, "Exit");
      break;
    case 2:
      fprintf(MSG_OUT, "JumpTT %" PRIu8, vm_getbits(command, 22, 7));
      break;
    case 3:
      fprintf(MSG_OUT, "JumpVTS_TT %" PRIu8, vm_getbits(command, 22, 7));
      break;
    case 5:
      fprintf(MSG_OUT, "JumpVTS_PTT %" PRIu8 ":%" PRIu16, 
	      vm_getbits(command, 22, 7), vm_getbits(command, 41, 10));
      break;
    case 6:
      switch(vm_getbits(command, 23, 2)) {
        case 0:
          fprintf(MSG_OUT, "JumpSS FP");
          break;
        case 1:
          fprintf(MSG_OUT, "JumpSS VMGM (menu %" PRIu8 ")", vm_getbits(command, 19, 4));
          break;
        case 2:
          fprintf(MSG_OUT, "JumpSS VTSM (vts %" PRIu8 ", title %" PRIu8 
		  ", menu %" PRIu8 ")", vm_getbits(command, 30, 7), vm_getbits(command, 38, 7), vm_getbits(command, 19, 4));
          break;
        case 3:
          fprintf(MSG_OUT, "JumpSS VMGM (pgc %" PRIu8 ")", vm_getbits(command, 46, 15));
          break;
        }
      break;
    case 8:
      switch(vm_getbits(command, 23, 2)) {
        case 0:
          fprintf(MSG_OUT, "CallSS FP (rsm_cell %" PRIu8 ")",
              vm_getbits(command, 31, 8));
          break;
        case 1:
          fprintf(MSG_OUT, "CallSS VMGM (menu %" PRIu8 
		  ", rsm_cell %" PRIu8 ")", vm_getbits(command, 19, 4), vm_getbits(command, 31, 8));
          break;
        case 2:
          fprintf(MSG_OUT, "CallSS VTSM (menu %" PRIu8 
		  ", rsm_cell %" PRIu8 ")", vm_getbits(command, 19, 4), vm_getbits(command, 31, 8));
          break;
        case 3:
          fprintf(MSG_OUT, "CallSS VMGM (pgc %" PRIu8 ", rsm_cell %" PRIu8 ")", 
		  vm_getbits(command, 46, 15), vm_getbits(command, 31, 8));
          break;
      }
      break;
    default:
      fprintf(MSG_OUT, "WARNING: Unknown Jump/Call instruction");
  }
}

static void print_system_set(command_t* command) {
  int i;
/* FIXME: What about SPRM11 ? Karaoke */
/*        Surely there must be some system set command for that ? */
  
  switch(vm_getbits(command, 59, 4)) {
    case 1: /*  Set system reg 1 &| 2 &| 3 (Audio, Subp. Angle) */
      for(i = 1; i <= 3; i++) {
        if(vm_getbits(command, 47 - (i*8), 1)) {
          print_system_reg(i);
          fprintf(MSG_OUT, " = ");
          print_reg_or_data_2(command, vm_getbits(command, 60, 1), 47 - (i*8) );
          fprintf(MSG_OUT, " ");
        }
      }
      break;
    case 2: /*  Set system reg 9 & 10 (Navigation timer, Title PGC number) */
      print_system_reg(9);
      fprintf(MSG_OUT, " = ");
      print_reg_or_data(command, vm_getbits(command, 60, 1), 47);
      fprintf(MSG_OUT, " ");
      print_system_reg(10);
      fprintf(MSG_OUT, " = %" PRIu16, vm_getbits(command, 30, 15)); /*  ?? */
      break;
    case 3: /*  Mode: Counter / Register + Set */
      fprintf(MSG_OUT, "SetMode ");
      if(vm_getbits(command, 23, 1))
	fprintf(MSG_OUT, "Counter ");
      else
	fprintf(MSG_OUT, "Register ");
      print_g_reg(vm_getbits(command, 19, 4));
      print_set_op(0x1); /*  '=' */
      print_reg_or_data(command, vm_getbits(command, 60, 1), 47);
      break;
    case 6: /*  Set system reg 8 (Highlighted button) */
      print_system_reg(8);
      if(vm_getbits(command, 60, 1)) /*  immediate */
        fprintf(MSG_OUT, " = 0x%x (button no %d)", vm_getbits(command, 31, 16), vm_getbits(command, 31, 6));
      else
        fprintf(MSG_OUT, " = g[%" PRIu8 "]", vm_getbits(command, 19, 4));
      break;
    default:
      fprintf(MSG_OUT, "WARNING: Unknown system set instruction (%i)", 
	      vm_getbits(command, 59, 4));
  }
}

static void print_set_version_1(command_t* command) {
  uint8_t set_op = vm_getbits(command, 59, 4);
  
  if(set_op) {
    print_g_reg(vm_getbits(command, 35, 4));
    print_set_op(set_op);
    print_reg_or_data(command, vm_getbits(command, 60, 1), 31);
  } else {
    fprintf(MSG_OUT, "NOP");
  }
}

static void print_set_version_2(command_t* command) {
  uint8_t set_op = vm_getbits(command, 59, 4);
  
  if(set_op) {
    print_g_reg(vm_getbits(command, 51, 4));
    print_set_op(set_op);
    print_reg_or_data(command, vm_getbits(command, 60, 1), 47);
  } else {
    fprintf(MSG_OUT, "NOP");
  }
}

static void print_set_version_3(command_t* command) {
  uint8_t set_op = vm_getbits(command, 59, 4);
  
  if(set_op) {
    print_g_reg(vm_getbits(command, 51, 4));
    print_set_op(set_op);
    print_reg_or_data_3(command, vm_getbits(command, 60, 1), 47);
  } else {
    fprintf(MSG_OUT, "NOP");
  }
}


void vm_print_mnemonic(vm_cmd_t *vm_command)  {
  command_t command;
  command.instruction =( (uint64_t) vm_command->bytes[0] << 56 ) |
        ( (uint64_t) vm_command->bytes[1] << 48 ) |
        ( (uint64_t) vm_command->bytes[2] << 40 ) |
        ( (uint64_t) vm_command->bytes[3] << 32 ) |
        ( (uint64_t) vm_command->bytes[4] << 24 ) |
        ( (uint64_t) vm_command->bytes[5] << 16 ) |
        ( (uint64_t) vm_command->bytes[6] <<  8 ) |
          (uint64_t) vm_command->bytes[7] ;
  command.examined = 0; 

  switch(vm_getbits(&command,63,3)) { /* three first bits */
    case 0: /*  Special instructions */
      print_if_version_1(&command);
      print_special_instruction(&command);
      break;
    case 1: /*  Jump/Call or Link instructions */
      if(vm_getbits(&command,60,1)) {
        print_if_version_2(&command);
        print_jump_instruction(&command);
      } else {
        print_if_version_1(&command);
        print_link_instruction(&command, 0); /*  must be pressent */
      }
      break;
    case 2: /*  Set System Parameters instructions */
      print_if_version_2(&command);
      print_system_set(&command);
      print_link_instruction(&command, 1); /*  either 'if' or 'link' */
      break;
    case 3: /*  Set General Parameters instructions */
      print_if_version_3(&command);
      print_set_version_1(&command);
      print_link_instruction(&command, 1); /*  either 'if' or 'link' */
      break;
    case 4: /*  Set, Compare -> LinkSub instructions */
      print_set_version_2(&command);
      fprintf(MSG_OUT, ", ");
      print_if_version_4(&command);
      print_linksub_instruction(&command);
      break;
    case 5: /*  Compare -> (Set and LinkSub) instructions */
      print_if_version_5(&command);
      fprintf(MSG_OUT, "{ ");
      print_set_version_3(&command);
      fprintf(MSG_OUT, ", ");
      print_linksub_instruction(&command);
      fprintf(MSG_OUT, " }");
      break;
    case 6: /*  Compare -> Set, always LinkSub instructions */
      print_if_version_5(&command);
      fprintf(MSG_OUT, "{ ");
      print_set_version_3(&command);
      fprintf(MSG_OUT, " } ");
      print_linksub_instruction(&command);
      break;
    default:
      fprintf(MSG_OUT, "WARNING: Unknown instruction type (%i)", vm_getbits(&command, 63, 3));
  }
  /*  Check if there still are bits set that were not examined */
  
  if(command.instruction & ~ command.examined) {
    fprintf(MSG_OUT, " libdvdnav: vmcmd.c: [WARNING, unknown bits:");
    fprintf(MSG_OUT, " %08llx", (command.instruction & ~ command.examined) );
    fprintf(MSG_OUT, "]");
  }
}

void vm_print_cmd(int row, vm_cmd_t *vm_command) {
  int i;

  fprintf(MSG_OUT, "(%03d) ", row + 1);
  for(i = 0; i < 8; i++)
    fprintf(MSG_OUT, "%02x ", vm_command->bytes[i]);
  fprintf(MSG_OUT, "| ");

  vm_print_mnemonic(vm_command);
  fprintf(MSG_OUT, "\n");
}