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1 /* |
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2 SDL - Simple DirectMedia Layer |
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3 Copyright (C) 1997-2004 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 #include "SDL_config.h" |
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23 |
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24 #ifdef SDL_CDROM_MINT |
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25 |
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26 /* |
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27 Atari MetaDOS CD-ROM functions |
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28 |
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29 Patrice Mandin |
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30 */ |
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31 |
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32 #include <errno.h> |
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33 |
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34 #include <cdromio.h> |
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35 #include <metados.h> |
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36 |
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37 #include "SDL_cdrom.h" |
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38 #include "../SDL_syscdrom.h" |
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39 |
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40 /* Some ioctl() errno values which occur when the tray is empty */ |
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41 #ifndef ENOMEDIUM |
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42 #define ENOMEDIUM ENOENT |
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43 #endif |
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44 #define ERRNO_TRAYEMPTY(errno) \ |
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45 ((errno == EIO) || (errno == ENOENT) || \ |
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46 (errno == EINVAL) || (errno == ENOMEDIUM)) |
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47 |
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48 /* The maximum number of CD-ROM drives we'll detect */ |
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49 #define MAX_DRIVES 32 |
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50 |
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51 typedef struct { |
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52 unsigned char device[3]; /* Physical device letter + ':' + '\0' */ |
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53 metaopen_t metaopen; /* Infos on opened drive */ |
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54 } metados_drive_t; |
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55 |
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56 static metados_drive_t metados_drives[MAX_DRIVES]; |
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57 |
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58 /* The system-dependent CD control functions */ |
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59 static const char *SDL_SYS_CDName(int drive); |
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60 static int SDL_SYS_CDOpen(int drive); |
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61 static void SDL_SYS_CDClose(SDL_CD *cdrom); |
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62 static int SDL_SYS_CDioctl(int id, int command, void *arg); |
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63 static int SDL_SYS_CDGetTOC(SDL_CD *cdrom); |
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64 static CDstatus SDL_SYS_CDStatus(SDL_CD *cdrom, int *position); |
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65 static int SDL_SYS_CDPlay(SDL_CD *cdrom, int start, int length); |
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66 static int SDL_SYS_CDPause(SDL_CD *cdrom); |
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67 static int SDL_SYS_CDResume(SDL_CD *cdrom); |
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68 static int SDL_SYS_CDStop(SDL_CD *cdrom); |
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69 static int SDL_SYS_CDEject(SDL_CD *cdrom); |
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70 |
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71 int SDL_SYS_CDInit(void) |
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72 { |
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73 metainit_t metainit={0,0,0,0}; |
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74 metaopen_t metaopen; |
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75 int i, handle; |
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76 struct cdrom_subchnl info; |
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77 |
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78 Metainit(&metainit); |
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79 if (metainit.version == NULL) { |
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80 #ifdef DEBUG_CDROM |
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81 fprintf(stderr, "MetaDOS not installed\n"); |
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82 #endif |
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83 return -1; |
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84 } |
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85 |
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86 if (metainit.drives_map == 0) { |
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87 #ifdef DEBUG_CDROM |
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88 fprintf(stderr, "No MetaDOS devices present\n"); |
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89 #endif |
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90 return -1; |
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91 } |
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92 |
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93 SDL_numcds = 0; |
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94 |
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95 for (i='A'; i<='Z'; i++) { |
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96 metados_drives[SDL_numcds].device[0] = 0; |
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97 metados_drives[SDL_numcds].device[1] = ':'; |
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98 metados_drives[SDL_numcds].device[2] = 0; |
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99 |
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100 if (metainit.drives_map & (1<<(i-'A'))) { |
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101 handle = Metaopen(i, &metaopen); |
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102 if (handle == 0) { |
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103 |
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104 info.cdsc_format = CDROM_MSF; |
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105 if ( (Metaioctl(i, METADOS_IOCTL_MAGIC, CDROMSUBCHNL, &info) == 0) || ERRNO_TRAYEMPTY(errno) ) { |
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106 metados_drives[SDL_numcds].device[0] = i; |
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107 ++SDL_numcds; |
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108 } |
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109 |
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110 Metaclose(i); |
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111 } |
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112 } |
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113 } |
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114 |
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115 /* Fill in our driver capabilities */ |
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116 SDL_CDcaps.Name = SDL_SYS_CDName; |
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117 SDL_CDcaps.Open = SDL_SYS_CDOpen; |
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118 SDL_CDcaps.Close = SDL_SYS_CDClose; |
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119 |
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120 SDL_CDcaps.GetTOC = SDL_SYS_CDGetTOC; |
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121 SDL_CDcaps.Status = SDL_SYS_CDStatus; |
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122 SDL_CDcaps.Play = SDL_SYS_CDPlay; |
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123 SDL_CDcaps.Pause = SDL_SYS_CDPause; |
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124 SDL_CDcaps.Resume = SDL_SYS_CDResume; |
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125 SDL_CDcaps.Stop = SDL_SYS_CDStop; |
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126 SDL_CDcaps.Eject = SDL_SYS_CDEject; |
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127 |
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128 return 0; |
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129 } |
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130 |
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131 void SDL_SYS_CDQuit(void) |
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132 { |
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133 SDL_numcds = 0; |
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134 } |
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135 |
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136 static const char *SDL_SYS_CDName(int drive) |
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137 { |
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138 return(metados_drives[drive].device); |
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139 } |
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140 |
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141 static int SDL_SYS_CDOpen(int drive) |
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142 { |
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143 int handle; |
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144 |
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145 handle = Metaopen(metados_drives[drive].device[0], &(metados_drives[drive].metaopen)); |
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146 if (handle == 0) { |
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147 return drive; |
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148 } |
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149 |
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150 return -1; |
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151 } |
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152 |
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153 static void SDL_SYS_CDClose(SDL_CD *cdrom) |
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154 { |
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155 Metaclose(metados_drives[cdrom->id].device[0]); |
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156 } |
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157 |
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158 static int SDL_SYS_CDioctl(int id, int command, void *arg) |
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159 { |
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160 int retval; |
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161 |
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162 retval = Metaioctl(metados_drives[id].device[0], METADOS_IOCTL_MAGIC, command, arg); |
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163 if ( retval < 0 ) { |
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164 SDL_SetError("ioctl() error: %s", strerror(errno)); |
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165 } |
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166 return(retval); |
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167 } |
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168 |
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169 static int SDL_SYS_CDGetTOC(SDL_CD *cdrom) |
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170 { |
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171 int i,okay; |
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172 struct cdrom_tochdr toc; |
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173 struct cdrom_tocentry entry; |
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174 |
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175 /* Use standard ioctl() */ |
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176 if (SDL_SYS_CDioctl(cdrom->id, CDROMREADTOCHDR, &toc)<0) { |
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177 return -1; |
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178 } |
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179 |
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180 cdrom->numtracks = toc.cdth_trk1-toc.cdth_trk0+1; |
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181 if ( cdrom->numtracks > SDL_MAX_TRACKS ) { |
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182 cdrom->numtracks = SDL_MAX_TRACKS; |
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183 } |
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184 |
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185 /* Read all the track TOC entries */ |
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186 okay=1; |
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187 for ( i=0; i<=cdrom->numtracks; ++i ) { |
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188 if ( i == cdrom->numtracks ) { |
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189 cdrom->track[i].id = CDROM_LEADOUT; |
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190 } else { |
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191 cdrom->track[i].id = toc.cdth_trk0+i; |
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192 } |
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193 entry.cdte_track = cdrom->track[i].id; |
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194 entry.cdte_format = CDROM_MSF; |
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195 if ( SDL_SYS_CDioctl(cdrom->id, CDROMREADTOCENTRY, &entry) < 0 ) { |
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196 okay=0; |
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197 break; |
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198 } else { |
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199 if ( entry.cdte_ctrl & CDROM_DATA_TRACK ) { |
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200 cdrom->track[i].type = SDL_DATA_TRACK; |
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201 } else { |
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202 cdrom->track[i].type = SDL_AUDIO_TRACK; |
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203 } |
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204 cdrom->track[i].offset = MSF_TO_FRAMES( |
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205 entry.cdte_addr.msf.minute, |
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206 entry.cdte_addr.msf.second, |
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207 entry.cdte_addr.msf.frame); |
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208 cdrom->track[i].length = 0; |
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209 if ( i > 0 ) { |
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210 cdrom->track[i-1].length = cdrom->track[i].offset-cdrom->track[i-1].offset; |
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211 } |
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212 } |
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213 } |
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214 |
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215 return(okay ? 0 : -1); |
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216 } |
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217 |
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218 /* Get CD-ROM status */ |
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219 static CDstatus SDL_SYS_CDStatus(SDL_CD *cdrom, int *position) |
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220 { |
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221 CDstatus status; |
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222 struct cdrom_tochdr toc; |
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223 struct cdrom_subchnl info; |
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224 |
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225 info.cdsc_format = CDROM_MSF; |
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226 if ( SDL_SYS_CDioctl(cdrom->id, CDROMSUBCHNL, &info) < 0 ) { |
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227 if ( ERRNO_TRAYEMPTY(errno) ) { |
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228 status = CD_TRAYEMPTY; |
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229 } else { |
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230 status = CD_ERROR; |
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231 } |
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232 } else { |
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233 switch (info.cdsc_audiostatus) { |
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234 case CDROM_AUDIO_INVALID: |
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235 case CDROM_AUDIO_NO_STATUS: |
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236 /* Try to determine if there's a CD available */ |
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237 if (SDL_SYS_CDioctl(cdrom->id, CDROMREADTOCHDR, &toc)==0) { |
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238 status = CD_STOPPED; |
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239 } else { |
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240 status = CD_TRAYEMPTY; |
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241 } |
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242 break; |
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243 case CDROM_AUDIO_COMPLETED: |
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244 status = CD_STOPPED; |
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245 break; |
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246 case CDROM_AUDIO_PLAY: |
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247 status = CD_PLAYING; |
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248 break; |
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249 case CDROM_AUDIO_PAUSED: |
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250 /* Workaround buggy CD-ROM drive */ |
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251 if ( info.cdsc_trk == CDROM_LEADOUT ) { |
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252 status = CD_STOPPED; |
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253 } else { |
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254 status = CD_PAUSED; |
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255 } |
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256 break; |
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257 default: |
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258 status = CD_ERROR; |
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259 break; |
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260 } |
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261 } |
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262 if ( position ) { |
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263 if ( status == CD_PLAYING || (status == CD_PAUSED) ) { |
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264 *position = MSF_TO_FRAMES( |
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265 info.cdsc_absaddr.msf.minute, |
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266 info.cdsc_absaddr.msf.second, |
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267 info.cdsc_absaddr.msf.frame); |
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268 } else { |
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269 *position = 0; |
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270 } |
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271 } |
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272 return(status); |
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273 } |
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274 |
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275 /* Start play */ |
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276 static int SDL_SYS_CDPlay(SDL_CD *cdrom, int start, int length) |
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277 { |
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278 struct cdrom_msf playtime; |
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279 |
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280 FRAMES_TO_MSF(start, |
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281 &playtime.cdmsf_min0, &playtime.cdmsf_sec0, &playtime.cdmsf_frame0); |
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282 FRAMES_TO_MSF(start+length, |
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283 &playtime.cdmsf_min1, &playtime.cdmsf_sec1, &playtime.cdmsf_frame1); |
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284 #ifdef DEBUG_CDROM |
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285 fprintf(stderr, "Trying to play from %d:%d:%d to %d:%d:%d\n", |
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286 playtime.cdmsf_min0, playtime.cdmsf_sec0, playtime.cdmsf_frame0, |
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287 playtime.cdmsf_min1, playtime.cdmsf_sec1, playtime.cdmsf_frame1); |
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288 #endif |
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289 |
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290 return SDL_SYS_CDioctl(cdrom->id, CDROMPLAYMSF, &playtime); |
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291 } |
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292 |
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293 /* Pause play */ |
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294 static int SDL_SYS_CDPause(SDL_CD *cdrom) |
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295 { |
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296 return SDL_SYS_CDioctl(cdrom->id, CDROMPAUSE, 0); |
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297 } |
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298 |
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299 /* Resume play */ |
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300 static int SDL_SYS_CDResume(SDL_CD *cdrom) |
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301 { |
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302 return SDL_SYS_CDioctl(cdrom->id, CDROMRESUME, 0); |
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303 } |
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304 |
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305 /* Stop play */ |
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306 static int SDL_SYS_CDStop(SDL_CD *cdrom) |
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307 { |
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308 return SDL_SYS_CDioctl(cdrom->id, CDROMSTOP, 0); |
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309 } |
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310 |
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311 /* Eject the CD-ROM */ |
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312 static int SDL_SYS_CDEject(SDL_CD *cdrom) |
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313 { |
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314 return SDL_SYS_CDioctl(cdrom->id, CDROMEJECT, 0); |
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315 } |
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316 |
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317 #endif /* SDL_CDROM_MINT */ |