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724
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1 /*
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2 SDL - Simple DirectMedia Layer
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3 Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002 Sam Lantinga
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4
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5 This library is free software; you can redistribute it and/or
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6 modify it under the terms of the GNU Library General Public
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7 License as published by the Free Software Foundation; either
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8 version 2 of the License, or (at your option) any later version.
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9
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10 This library is distributed in the hope that it will be useful,
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11 but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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13 Library General Public License for more details.
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14
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15 You should have received a copy of the GNU Library General Public
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16 License along with this library; if not, write to the Free
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17 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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18
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19 Sam Lantinga
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20 slouken@libsdl.org
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21 */
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22
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23 #ifdef SAVE_RCSID
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24 static char rcsid =
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25 "@(#) $Id$";
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26 #endif
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27
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28 /*
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29 Atari MetaDOS CD-ROM functions
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30
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31 Patrice Mandin
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32 */
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33
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34 #include <errno.h>
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35 #include <stdio.h>
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36 #include <stdlib.h>
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37 #include <string.h>
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38
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39 #include <cdromio.h>
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40 #include <metados.h>
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41
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42 #include "SDL_error.h"
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43 #include "SDL_cdrom.h"
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44 #include "SDL_syscdrom.h"
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45
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46
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47 /* The maximum number of CD-ROM drives we'll detect */
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48 #define MAX_DRIVES 32
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49
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50 /* Type of CD-ROM drive */
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51 #define DRIVE_TYPE_NOCD -1
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52 #define DRIVE_TYPE_STANDARD 0
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53 #define DRIVE_TYPE_CDAR 1
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54
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55 typedef struct {
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56 int type; /* Standard, or old CDAR-type CD drive ? */
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57 unsigned char device[3]; /* Physical device letter + ':' + '\0' */
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58 metaopen_t metaopen; /* Infos on opened drive */
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59 } metados_drive_t;
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60
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61 static metados_drive_t metados_drives[MAX_DRIVES];
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62
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63 /* The system-dependent CD control functions */
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64 static const char *SDL_SYS_CDName(int drive);
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65 static int SDL_SYS_CDOpen(int drive);
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66 static void SDL_SYS_CDClose(SDL_CD *cdrom);
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67 static int SDL_SYS_CDioctl(int id, int command, void *arg);
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68
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69 /* Commands using ioctl() */
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70 static int SDL_SYS_CDGetTOC(SDL_CD *cdrom);
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71 static CDstatus SDL_SYS_CDStatus(SDL_CD *cdrom, int *position);
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72 static int SDL_SYS_CDPlay(SDL_CD *cdrom, int start, int length);
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73 static int SDL_SYS_CDPause(SDL_CD *cdrom);
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74 static int SDL_SYS_CDResume(SDL_CD *cdrom);
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75 static int SDL_SYS_CDStop(SDL_CD *cdrom);
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76 static int SDL_SYS_CDEject(SDL_CD *cdrom);
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77
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78 /* Commands using Meta*() CDAR functions */
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79 static int SDL_SYS_CD_BcdToBinary(int value);
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80 static int SDL_SYS_CDGetTOC_CDAR(SDL_CD *cdrom);
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81 static CDstatus SDL_SYS_CDStatus_CDAR(SDL_CD *cdrom, int *position);
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82
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83 int SDL_SYS_CDInit(void)
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84 {
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85 metainit_t metainit={0,0,0,0};
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86 metaopen_t metaopen;
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87 int i, handle;
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88
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89 Metainit(&metainit);
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90 if (metainit.version == NULL) {
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91 #ifdef DEBUG_CDROM
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92 fprintf(stderr, "MetaDOS not installed\n");
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93 #endif
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94 return -1;
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95 }
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96
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97 if (metainit.drives_map == 0) {
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98 #ifdef DEBUG_CDROM
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99 fprintf(stderr, "No MetaDOS devices present\n");
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100 #endif
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101 return -1;
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102 }
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103
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104 SDL_numcds = 0;
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105
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106 for (i='A'; i<='Z'; i++) {
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107 metados_drives[SDL_numcds].type = DRIVE_TYPE_NOCD;
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108 metados_drives[SDL_numcds].device[0] = 0;
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109 metados_drives[SDL_numcds].device[1] = ':';
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110 metados_drives[SDL_numcds].device[2] = 0;
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111
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112 if (metainit.drives_map & (1<<(i-'A'))) {
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113 handle = Metaopen(i, &metaopen);
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114 if (handle == 0) {
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115
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116 if ( (metaopen.name[0]=='C') && (metaopen.name[1]=='D') &&
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117 (metaopen.name[2]=='A') && (metaopen.name[3]=='R')) {
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118 /* Drive compatible with CDAR */
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119 metados_drives[SDL_numcds].type = DRIVE_TYPE_CDAR;
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120 metados_drives[SDL_numcds].device[0] = i;
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121 ++SDL_numcds;
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122 } else {
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123 /* Check for a CD-ROM device */
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124 if ((Metastatus(i, NULL) & 0x7fff) >= 0) {
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125 /* Drive compatible with new ioctl functions */
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126 metados_drives[SDL_numcds].type = DRIVE_TYPE_STANDARD;
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127 metados_drives[SDL_numcds].device[0] = i;
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128 ++SDL_numcds;
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129 }
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130 }
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131
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132 Metaclose(i);
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133 }
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134 }
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135 }
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136
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137 /* Fill in our driver capabilities */
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138 SDL_CDcaps.Name = SDL_SYS_CDName;
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139 SDL_CDcaps.Open = SDL_SYS_CDOpen;
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140 SDL_CDcaps.Close = SDL_SYS_CDClose;
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141
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142 SDL_CDcaps.GetTOC = SDL_SYS_CDGetTOC;
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143 SDL_CDcaps.Status = SDL_SYS_CDStatus;
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144 SDL_CDcaps.Play = SDL_SYS_CDPlay;
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145 SDL_CDcaps.Pause = SDL_SYS_CDPause;
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146 SDL_CDcaps.Resume = SDL_SYS_CDResume;
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147 SDL_CDcaps.Stop = SDL_SYS_CDStop;
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148 SDL_CDcaps.Eject = SDL_SYS_CDEject;
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149
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150 return 0;
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151 }
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152
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153 void SDL_SYS_CDQuit(void)
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154 {
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155 SDL_numcds = 0;
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156 }
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157
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158 static const char *SDL_SYS_CDName(int drive)
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159 {
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160 return(metados_drives[drive].device);
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161 }
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162
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163 static int SDL_SYS_CDOpen(int drive)
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164 {
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165 int handle;
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166
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167 handle = Metaopen(metados_drives[drive].device[0], &(metados_drives[drive].metaopen));
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168 if (handle == 0) {
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169 return drive;
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170 }
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171
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172 return -1;
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173 }
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174
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175 static void SDL_SYS_CDClose(SDL_CD *cdrom)
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176 {
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177 Metaclose(metados_drives[cdrom->id].device[0]);
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178 }
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179
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180 static int SDL_SYS_CDioctl(int id, int command, void *arg)
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181 {
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182 int retval;
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183
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184 retval = Metaioctl(metados_drives[id].device[0], METADOS_IOCTL_MAGIC, command, arg);
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185 if ( retval < 0 ) {
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186 SDL_SetError("ioctl() error: %s", strerror(errno));
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187 }
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188 return(retval);
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189 }
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190
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191 static int SDL_SYS_CD_BcdToBinary(int value)
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192 {
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193 int tmp;
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194
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195 tmp = (value>>4) & 0xf;
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196 return (tmp*10)+(value & 0xf);
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197 }
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198
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199 static int SDL_SYS_CDGetTOC_CDAR(SDL_CD *cdrom)
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200 {
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201 int errorcode, i, minute, second, frame;
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202 metatocentry_t *toc_entries;
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203 metadiscinfo_t disc_info;
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204
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205 /* First, read disc info */
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206 errorcode = Metadiscinfo(metados_drives[cdrom->id].device[0], &disc_info);
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207 if (errorcode<0) {
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208 #ifdef DEBUG_CDROM
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209 fprintf(stderr, "Can not read disc info\n");
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210 #endif
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211 return -1;
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212 }
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213
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214 cdrom->numtracks = disc_info.last - disc_info.first + 1;
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215
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216 /* Then read toc entries for tracks */
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217 toc_entries = (metatocentry_t *)malloc(100*sizeof(metatocentry_t));
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218 if (toc_entries == NULL) {
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219 #ifdef DEBUG_CDROM
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220 fprintf(stderr, "Can not allocate memory for TOC entries\n");
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221 #endif
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222 return -1;
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223 }
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224
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225 errorcode = Metagettoc(metados_drives[cdrom->id].device[0], 0, toc_entries);
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226 if (errorcode<0) {
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227 #ifdef DEBUG_CDROM
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228 fprintf(stderr, "Can not read TOC\n");
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229 #endif
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230 free(toc_entries);
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231 return -1;
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232 }
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233
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234 i=0;
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235 for (;;) {
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236 if ((toc_entries[i].track==0) && (toc_entries[i].minute==0) &&
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237 (toc_entries[i].second==0) && (toc_entries[i].frame==0)
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238 ) {
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239 break;
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240 }
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241
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242 if (toc_entries[i].track == CDROM_LEADOUT_CDAR) {
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243 cdrom->track[i].id = CDROM_LEADOUT;
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244 } else {
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245 cdrom->track[i].id = toc_entries[i].track;
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246 }
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247 if (disc_info.disctype == 0) {
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248 cdrom->track[i].type = SDL_AUDIO_TRACK;
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249 } else {
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250 cdrom->track[i].type = SDL_DATA_TRACK;
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251 }
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252 minute = SDL_SYS_CD_BcdToBinary(toc_entries[i].minute);
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253 second = SDL_SYS_CD_BcdToBinary(toc_entries[i].second);
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254 frame = SDL_SYS_CD_BcdToBinary(toc_entries[i].frame);
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255 cdrom->track[i].offset = MSF_TO_FRAMES(minute, second, frame);
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256
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257 if ( i > 0 ) {
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258 cdrom->track[i-1].length = cdrom->track[i].offset - cdrom->track[i-1].offset;
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259 }
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260
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261 ++i;
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262 }
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263
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264 free(toc_entries);
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265 return 0;
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266 }
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267
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268 static int SDL_SYS_CDGetTOC(SDL_CD *cdrom)
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269 {
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270 int i,okay;
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271 struct cdrom_tochdr toc;
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272 struct cdrom_tocentry entry;
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273
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274 /* CDAR compatible drive ? */
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275 if (metados_drives[cdrom->id].type == DRIVE_TYPE_CDAR) {
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276 return SDL_SYS_CDGetTOC_CDAR(cdrom);
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277 }
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278
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279 /* Use standard ioctl() */
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280 if (SDL_SYS_CDioctl(cdrom->id, CDROMREADTOCHDR, &toc)<0) {
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281 return -1;
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282 }
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283
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284 cdrom->numtracks = toc.cdth_trk1-toc.cdth_trk0+1;
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285 if ( cdrom->numtracks > SDL_MAX_TRACKS ) {
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286 cdrom->numtracks = SDL_MAX_TRACKS;
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287 }
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288
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289 /* Read all the track TOC entries */
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290 okay=1;
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291 for ( i=0; i<=cdrom->numtracks; ++i ) {
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292 if ( i == cdrom->numtracks ) {
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293 cdrom->track[i].id = CDROM_LEADOUT;
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294 } else {
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295 cdrom->track[i].id = toc.cdth_trk0+i;
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296 }
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297 entry.cdte_track = cdrom->track[i].id;
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298 entry.cdte_format = CDROM_MSF;
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299 if ( SDL_SYS_CDioctl(cdrom->id, CDROMREADTOCENTRY, &entry) < 0 ) {
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300 okay=0;
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301 break;
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302 } else {
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303 if ( entry.cdte_ctrl & CDROM_DATA_TRACK ) {
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304 cdrom->track[i].type = SDL_DATA_TRACK;
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305 } else {
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306 cdrom->track[i].type = SDL_AUDIO_TRACK;
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307 }
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308 cdrom->track[i].offset = MSF_TO_FRAMES(
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309 entry.cdte_addr.msf.minute,
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310 entry.cdte_addr.msf.second,
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311 entry.cdte_addr.msf.frame);
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312 cdrom->track[i].length = 0;
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313 if ( i > 0 ) {
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314 cdrom->track[i-1].length = cdrom->track[i].offset-cdrom->track[i-1].offset;
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315 }
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316 }
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317 }
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318
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319 return(okay ? 0 : -1);
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320 }
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321
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322 /* Get CD-ROM status */
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323 static CDstatus SDL_SYS_CDStatus_CDAR(SDL_CD *cdrom, int *position)
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324 {
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325 return CD_ERROR;
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326 }
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327
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328 static CDstatus SDL_SYS_CDStatus(SDL_CD *cdrom, int *position)
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329 {
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330 CDstatus status;
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331 struct cdrom_tochdr toc;
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332 struct cdrom_subchnl info;
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333
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334 /* CDAR compatible drive ? */
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335 if (metados_drives[cdrom->id].type == DRIVE_TYPE_CDAR) {
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336 return SDL_SYS_CDStatus_CDAR(cdrom, position);
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337 }
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338
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339 /* Standard ioctl */
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340 info.cdsc_format = CDROM_MSF;
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341 if ( SDL_SYS_CDioctl(cdrom->id, CDROMSUBCHNL, &info) < 0 ) {
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342 status = CD_TRAYEMPTY;
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343 } else {
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344 switch (info.cdsc_audiostatus) {
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345 case CDROM_AUDIO_INVALID:
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346 case CDROM_AUDIO_NO_STATUS:
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347 /* Try to determine if there's a CD available */
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348 if (SDL_SYS_CDioctl(cdrom->id, CDROMREADTOCHDR, &toc)==0) {
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349 status = CD_STOPPED;
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350 } else {
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351 status = CD_TRAYEMPTY;
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352 }
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353 break;
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354 case CDROM_AUDIO_COMPLETED:
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355 status = CD_STOPPED;
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356 break;
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357 case CDROM_AUDIO_PLAY:
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358 status = CD_PLAYING;
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359 break;
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360 case CDROM_AUDIO_PAUSED:
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361 /* Workaround buggy CD-ROM drive */
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362 if ( info.cdsc_trk == CDROM_LEADOUT ) {
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363 status = CD_STOPPED;
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364 } else {
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365 status = CD_PAUSED;
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366 }
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367 break;
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368 default:
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369 status = CD_ERROR;
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370 break;
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371 }
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372 }
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373 if ( position ) {
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374 if ( status == CD_PLAYING || (status == CD_PAUSED) ) {
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375 *position = MSF_TO_FRAMES(
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376 info.cdsc_absaddr.msf.minute,
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377 info.cdsc_absaddr.msf.second,
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378 info.cdsc_absaddr.msf.frame);
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379 } else {
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380 *position = 0;
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381 }
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382 }
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383 return(status);
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384 }
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385
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386 /* Start play */
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387 static int SDL_SYS_CDPlay_CDAR(SDL_CD *cdrom, int start, int length)
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388 {
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389 struct cdrom_msf playtime;
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390
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391 FRAMES_TO_MSF(start,
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392 &playtime.cdmsf_min0, &playtime.cdmsf_sec0, &playtime.cdmsf_frame0);
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393 FRAMES_TO_MSF(start+length,
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394 &playtime.cdmsf_min1, &playtime.cdmsf_sec1, &playtime.cdmsf_frame1);
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395
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396 return Metasetsongtime(metados_drives[cdrom->id].device[0], 0,
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397 (playtime.cdmsf_min0<<16)|(playtime.cdmsf_sec0<<8)|(playtime.cdmsf_frame0),
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398 (playtime.cdmsf_min1<<16)|(playtime.cdmsf_sec1<<8)|(playtime.cdmsf_frame1)
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399 );
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400 }
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401
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402 static int SDL_SYS_CDPlay(SDL_CD *cdrom, int start, int length)
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403 {
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404 struct cdrom_msf playtime;
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405
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406 /* CDAR compatible drive ? */
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407 if (metados_drives[cdrom->id].type == DRIVE_TYPE_CDAR) {
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408 return SDL_SYS_CDPlay_CDAR(cdrom, start, length);
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409 }
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410
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411 FRAMES_TO_MSF(start,
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412 &playtime.cdmsf_min0, &playtime.cdmsf_sec0, &playtime.cdmsf_frame0);
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413 FRAMES_TO_MSF(start+length,
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414 &playtime.cdmsf_min1, &playtime.cdmsf_sec1, &playtime.cdmsf_frame1);
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415 #ifdef DEBUG_CDROM
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416 fprintf(stderr, "Trying to play from %d:%d:%d to %d:%d:%d\n",
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417 playtime.cdmsf_min0, playtime.cdmsf_sec0, playtime.cdmsf_frame0,
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418 playtime.cdmsf_min1, playtime.cdmsf_sec1, playtime.cdmsf_frame1);
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419 #endif
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420 return(SDL_SYS_CDioctl(cdrom->id, CDROMPLAYMSF, &playtime));
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421 }
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422
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423 /* Pause play */
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424 static int SDL_SYS_CDPause(SDL_CD *cdrom)
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425 {
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426 /* CDAR compatible drive ? */
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427 if (metados_drives[cdrom->id].type == DRIVE_TYPE_CDAR) {
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428 return -1;
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429 }
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430
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431 return(SDL_SYS_CDioctl(cdrom->id, CDROMPAUSE, 0));
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432 }
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433
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434 /* Resume play */
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435 static int SDL_SYS_CDResume(SDL_CD *cdrom)
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436 {
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437 /* CDAR compatible drive ? */
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438 if (metados_drives[cdrom->id].type == DRIVE_TYPE_CDAR) {
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439 return -1;
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440 }
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441
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442 return(SDL_SYS_CDioctl(cdrom->id, CDROMRESUME, 0));
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443 }
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444
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445 /* Stop play */
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446 static int SDL_SYS_CDStop(SDL_CD *cdrom)
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447 {
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448 /* CDAR compatible drive ? */
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449 if (metados_drives[cdrom->id].type == DRIVE_TYPE_CDAR) {
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450 return Metastopaudio(metados_drives[cdrom->id].device[0]);
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451 }
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452
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453 return(SDL_SYS_CDioctl(cdrom->id, CDROMSTOP, 0));
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454 }
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455
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456 /* Eject the CD-ROM */
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457 static int SDL_SYS_CDEject(SDL_CD *cdrom)
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458 {
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459 /* CDAR compatible drive ? */
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460 if (metados_drives[cdrom->id].type == DRIVE_TYPE_CDAR) {
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461 return -1;
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462 }
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463
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464 return(SDL_SYS_CDioctl(cdrom->id, CDROMEJECT, 0));
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465 }
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