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1 /* |
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2 SDL - Simple DirectMedia Layer |
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3 Copyright (C) 1997-2006 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 Lesser General Public |
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7 License as published by the Free Software Foundation; either |
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8 version 2.1 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 Lesser 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 Lesser General Public |
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16 License along with this library; if not, write to the Free Software |
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17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 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_OPENBSD |
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25 |
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26 /* Functions for system-level CD-ROM audio control */ |
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27 |
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28 #include <sys/types.h> |
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29 #include <sys/ioctl.h> |
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30 #include <sys/stat.h> |
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31 #include <fcntl.h> |
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32 #include <errno.h> |
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33 #include <unistd.h> |
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34 #include <sys/ioctl.h> |
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35 #include <sys/cdio.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 |
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41 /* The maximum number of CD-ROM drives we'll detect */ |
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42 #define MAX_DRIVES 16 |
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43 |
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44 /* A list of available CD-ROM drives */ |
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45 static char *SDL_cdlist[MAX_DRIVES]; |
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46 static dev_t SDL_cdmode[MAX_DRIVES]; |
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47 |
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48 /* The system-dependent CD control functions */ |
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49 static const char *SDL_SYS_CDName(int drive); |
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50 static int SDL_SYS_CDOpen(int drive); |
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51 static int SDL_SYS_CDGetTOC(SDL_CD *cdrom); |
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52 static CDstatus SDL_SYS_CDStatus(SDL_CD *cdrom, int *position); |
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53 static int SDL_SYS_CDPlay(SDL_CD *cdrom, int start, int length); |
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54 static int SDL_SYS_CDPause(SDL_CD *cdrom); |
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55 static int SDL_SYS_CDResume(SDL_CD *cdrom); |
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56 static int SDL_SYS_CDStop(SDL_CD *cdrom); |
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57 static int SDL_SYS_CDEject(SDL_CD *cdrom); |
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58 static void SDL_SYS_CDClose(SDL_CD *cdrom); |
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59 |
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60 /* Some ioctl() errno values which occur when the tray is empty */ |
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61 #define ERRNO_TRAYEMPTY(errno) \ |
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62 ((errno == EIO) || (errno == ENOENT) || (errno == EINVAL) || \ |
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63 (errno == ENODEV)) |
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64 |
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65 /* Check a drive to see if it is a CD-ROM */ |
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66 static int CheckDrive(char *drive, struct stat *stbuf) |
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67 { |
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68 int is_cd, cdfd; |
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69 struct ioc_read_subchannel info; |
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70 |
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71 /* If it doesn't exist, return -1 */ |
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72 if ( stat(drive, stbuf) < 0 ) { |
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73 return(-1); |
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74 } |
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75 |
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76 /* If it does exist, verify that it's an available CD-ROM */ |
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77 is_cd = 0; |
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78 if ( S_ISCHR(stbuf->st_mode) || S_ISBLK(stbuf->st_mode) ) { |
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79 cdfd = open(drive, (O_RDONLY|O_EXCL|O_NONBLOCK), 0); |
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80 if ( cdfd >= 0 ) { |
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81 info.address_format = CD_MSF_FORMAT; |
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82 info.data_format = CD_CURRENT_POSITION; |
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83 info.data_len = 0; |
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84 info.data = NULL; |
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85 /* Under Linux, EIO occurs when a disk is not present. |
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86 This isn't 100% reliable, so we use the USE_MNTENT |
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87 code above instead. |
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88 */ |
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89 if ( (ioctl(cdfd, CDIOCREADSUBCHANNEL, &info) == 0) || |
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90 ERRNO_TRAYEMPTY(errno) ) { |
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91 is_cd = 1; |
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92 } |
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93 close(cdfd); |
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94 } |
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95 else if (ERRNO_TRAYEMPTY(errno)) |
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96 is_cd = 1; |
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97 } |
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98 return(is_cd); |
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99 } |
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100 |
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101 /* Add a CD-ROM drive to our list of valid drives */ |
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102 static void AddDrive(char *drive, struct stat *stbuf) |
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103 { |
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104 int i; |
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105 |
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106 if ( SDL_numcds < MAX_DRIVES ) { |
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107 /* Check to make sure it's not already in our list. |
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108 This can happen when we see a drive via symbolic link. |
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109 */ |
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110 for ( i=0; i<SDL_numcds; ++i ) { |
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111 if ( stbuf->st_rdev == SDL_cdmode[i] ) { |
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112 #ifdef DEBUG_CDROM |
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113 fprintf(stderr, "Duplicate drive detected: %s == %s\n", drive, SDL_cdlist[i]); |
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114 #endif |
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115 return; |
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116 } |
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117 } |
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118 |
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119 /* Add this drive to our list */ |
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120 i = SDL_numcds; |
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121 SDL_cdlist[i] = SDL_strdup(drive); |
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122 if ( SDL_cdlist[i] == NULL ) { |
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123 SDL_OutOfMemory(); |
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124 return; |
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125 } |
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126 SDL_cdmode[i] = stbuf->st_rdev; |
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127 ++SDL_numcds; |
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128 #ifdef DEBUG_CDROM |
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129 fprintf(stderr, "Added CD-ROM drive: %s\n", drive); |
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130 #endif |
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131 } |
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132 } |
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133 |
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134 int SDL_SYS_CDInit(void) |
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135 { |
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136 static char *checklist[] = { |
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137 #if defined(__OPENBSD__) |
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138 "?0 cd?c", "cdrom", NULL |
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139 #elif defined(__NETBSD__) |
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140 "?0 cd?d", "?0 cd?c", "cdrom", NULL |
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141 #else |
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142 "?0 cd?c", "?0 acd?c", "cdrom", NULL |
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143 #endif |
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144 }; |
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145 char *SDLcdrom; |
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146 int i, j, exists; |
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147 char drive[32]; |
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148 struct stat stbuf; |
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149 |
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150 /* Fill in our driver capabilities */ |
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151 SDL_CDcaps.Name = SDL_SYS_CDName; |
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152 SDL_CDcaps.Open = SDL_SYS_CDOpen; |
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153 SDL_CDcaps.GetTOC = SDL_SYS_CDGetTOC; |
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154 SDL_CDcaps.Status = SDL_SYS_CDStatus; |
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155 SDL_CDcaps.Play = SDL_SYS_CDPlay; |
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156 SDL_CDcaps.Pause = SDL_SYS_CDPause; |
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157 SDL_CDcaps.Resume = SDL_SYS_CDResume; |
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158 SDL_CDcaps.Stop = SDL_SYS_CDStop; |
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159 SDL_CDcaps.Eject = SDL_SYS_CDEject; |
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160 SDL_CDcaps.Close = SDL_SYS_CDClose; |
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161 |
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162 /* Look in the environment for our CD-ROM drive list */ |
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163 SDLcdrom = SDL_getenv("SDL_CDROM"); /* ':' separated list of devices */ |
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164 if ( SDLcdrom != NULL ) { |
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165 char *cdpath, *delim; |
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166 size_t len = SDL_strlen(SDLcdrom)+1; |
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167 cdpath = SDL_stack_alloc(char, len); |
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168 if ( cdpath != NULL ) { |
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169 SDL_strlcpy(cdpath, SDLcdrom, len); |
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170 SDLcdrom = cdpath; |
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171 do { |
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172 delim = SDL_strchr(SDLcdrom, ':'); |
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173 if ( delim ) { |
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174 *delim++ = '\0'; |
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175 } |
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176 if ( CheckDrive(SDLcdrom, &stbuf) > 0 ) { |
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177 AddDrive(SDLcdrom, &stbuf); |
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178 } |
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179 if ( delim ) { |
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180 SDLcdrom = delim; |
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181 } else { |
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182 SDLcdrom = NULL; |
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183 } |
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184 } while ( SDLcdrom ); |
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185 SDL_stack_free(cdpath); |
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186 } |
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187 |
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188 /* If we found our drives, there's nothing left to do */ |
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189 if ( SDL_numcds > 0 ) { |
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190 return(0); |
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191 } |
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192 } |
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193 |
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194 /* Scan the system for CD-ROM drives */ |
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195 for ( i=0; checklist[i]; ++i ) { |
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196 if ( checklist[i][0] == '?' ) { |
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197 char *insert; |
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198 exists = 1; |
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199 for ( j=checklist[i][1]; exists; ++j ) { |
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200 SDL_snprintf(drive, SDL_arraysize(drive), "/dev/%s", &checklist[i][3]); |
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201 insert = SDL_strchr(drive, '?'); |
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202 if ( insert != NULL ) { |
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203 *insert = j; |
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204 } |
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205 switch (CheckDrive(drive, &stbuf)) { |
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206 /* Drive exists and is a CD-ROM */ |
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207 case 1: |
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208 AddDrive(drive, &stbuf); |
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209 break; |
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210 /* Drive exists, but isn't a CD-ROM */ |
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211 case 0: |
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212 break; |
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213 /* Drive doesn't exist */ |
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214 case -1: |
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215 exists = 0; |
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216 break; |
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217 } |
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218 } |
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219 } else { |
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220 SDL_snprintf(drive, SDL_arraysize(drive), "/dev/%s", checklist[i]); |
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221 if ( CheckDrive(drive, &stbuf) > 0 ) { |
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222 AddDrive(drive, &stbuf); |
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223 } |
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224 } |
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225 } |
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226 return(0); |
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227 } |
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228 |
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229 /* General ioctl() CD-ROM command function */ |
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230 static int SDL_SYS_CDioctl(int id, int command, void *arg) |
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231 { |
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232 int retval; |
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233 |
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234 retval = ioctl(id, command, arg); |
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235 if ( retval < 0 ) { |
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236 SDL_SetError("ioctl() error: %s", strerror(errno)); |
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237 } |
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238 return(retval); |
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239 } |
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240 |
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241 static const char *SDL_SYS_CDName(int drive) |
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242 { |
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243 return(SDL_cdlist[drive]); |
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244 } |
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245 |
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246 static int SDL_SYS_CDOpen(int drive) |
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247 { |
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248 return(open(SDL_cdlist[drive], (O_RDONLY|O_EXCL|O_NONBLOCK), 0)); |
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249 } |
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250 |
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251 static int SDL_SYS_CDGetTOC(SDL_CD *cdrom) |
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252 { |
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253 struct ioc_toc_header toc; |
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254 int i, okay; |
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255 struct ioc_read_toc_entry entry; |
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256 struct cd_toc_entry data; |
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257 |
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258 okay = 0; |
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259 if ( SDL_SYS_CDioctl(cdrom->id, CDIOREADTOCHEADER, &toc) == 0 ) { |
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260 cdrom->numtracks = toc.ending_track-toc.starting_track+1; |
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261 if ( cdrom->numtracks > SDL_MAX_TRACKS ) { |
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262 cdrom->numtracks = SDL_MAX_TRACKS; |
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263 } |
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264 /* Read all the track TOC entries */ |
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265 for ( i=0; i<=cdrom->numtracks; ++i ) { |
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266 if ( i == cdrom->numtracks ) { |
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267 cdrom->track[i].id = 0xAA; /* CDROM_LEADOUT */ |
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268 } else { |
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269 cdrom->track[i].id = toc.starting_track+i; |
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270 } |
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271 entry.starting_track = cdrom->track[i].id; |
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272 entry.address_format = CD_MSF_FORMAT; |
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273 entry.data_len = sizeof(data); |
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274 entry.data = &data; |
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275 if ( SDL_SYS_CDioctl(cdrom->id, CDIOREADTOCENTRYS, |
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276 &entry) < 0 ) { |
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277 break; |
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278 } else { |
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279 cdrom->track[i].type = data.control; |
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280 cdrom->track[i].offset = MSF_TO_FRAMES( |
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281 data.addr.msf.minute, |
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282 data.addr.msf.second, |
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283 data.addr.msf.frame); |
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284 cdrom->track[i].length = 0; |
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285 if ( i > 0 ) { |
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286 cdrom->track[i-1].length = |
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287 cdrom->track[i].offset- |
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288 cdrom->track[i-1].offset; |
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289 } |
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290 } |
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291 } |
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292 if ( i == (cdrom->numtracks+1) ) { |
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293 okay = 1; |
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294 } |
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295 } |
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296 return(okay ? 0 : -1); |
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297 } |
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298 |
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299 /* Get CD-ROM status */ |
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300 static CDstatus SDL_SYS_CDStatus(SDL_CD *cdrom, int *position) |
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301 { |
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302 CDstatus status; |
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303 struct ioc_toc_header toc; |
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304 struct ioc_read_subchannel info; |
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305 struct cd_sub_channel_info data; |
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306 |
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307 info.address_format = CD_MSF_FORMAT; |
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308 info.data_format = CD_CURRENT_POSITION; |
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309 info.track = 0; |
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310 info.data_len = sizeof(data); |
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311 info.data = &data; |
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312 if ( ioctl(cdrom->id, CDIOCREADSUBCHANNEL, &info) < 0 ) { |
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313 if ( ERRNO_TRAYEMPTY(errno) ) { |
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314 status = CD_TRAYEMPTY; |
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315 } else { |
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316 status = CD_ERROR; |
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317 } |
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318 } else { |
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319 switch (data.header.audio_status) { |
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320 case CD_AS_AUDIO_INVALID: |
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321 case CD_AS_NO_STATUS: |
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322 /* Try to determine if there's a CD available */ |
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323 if (ioctl(cdrom->id,CDIOREADTOCHEADER,&toc)==0) |
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324 status = CD_STOPPED; |
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325 else |
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326 status = CD_TRAYEMPTY; |
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327 break; |
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328 case CD_AS_PLAY_COMPLETED: |
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329 status = CD_STOPPED; |
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330 break; |
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331 case CD_AS_PLAY_IN_PROGRESS: |
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332 status = CD_PLAYING; |
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333 break; |
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334 case CD_AS_PLAY_PAUSED: |
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335 status = CD_PAUSED; |
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336 break; |
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337 default: |
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338 status = CD_ERROR; |
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339 break; |
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340 } |
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341 } |
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342 if ( position ) { |
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343 if ( status == CD_PLAYING || (status == CD_PAUSED) ) { |
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344 *position = MSF_TO_FRAMES( |
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345 data.what.position.absaddr.msf.minute, |
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346 data.what.position.absaddr.msf.second, |
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347 data.what.position.absaddr.msf.frame); |
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348 } else { |
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349 *position = 0; |
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350 } |
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351 } |
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352 return(status); |
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353 } |
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354 |
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355 /* Start play */ |
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356 static int SDL_SYS_CDPlay(SDL_CD *cdrom, int start, int length) |
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357 { |
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358 struct ioc_play_msf playtime; |
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359 |
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360 FRAMES_TO_MSF(start, |
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361 &playtime.start_m, &playtime.start_s, &playtime.start_f); |
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362 FRAMES_TO_MSF(start+length, |
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363 &playtime.end_m, &playtime.end_s, &playtime.end_f); |
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364 #ifdef DEBUG_CDROM |
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365 fprintf(stderr, "Trying to play from %d:%d:%d to %d:%d:%d\n", |
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366 playtime.start_m, playtime.start_s, playtime.start_f, |
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367 playtime.end_m, playtime.end_s, playtime.end_f); |
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368 #endif |
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369 ioctl(cdrom->id, CDIOCSTART, 0); |
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370 return(SDL_SYS_CDioctl(cdrom->id, CDIOCPLAYMSF, &playtime)); |
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371 } |
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372 |
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373 /* Pause play */ |
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374 static int SDL_SYS_CDPause(SDL_CD *cdrom) |
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375 { |
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376 return(SDL_SYS_CDioctl(cdrom->id, CDIOCPAUSE, 0)); |
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377 } |
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378 |
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379 /* Resume play */ |
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380 static int SDL_SYS_CDResume(SDL_CD *cdrom) |
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381 { |
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382 return(SDL_SYS_CDioctl(cdrom->id, CDIOCRESUME, 0)); |
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383 } |
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384 |
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385 /* Stop play */ |
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386 static int SDL_SYS_CDStop(SDL_CD *cdrom) |
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387 { |
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388 return(SDL_SYS_CDioctl(cdrom->id, CDIOCSTOP, 0)); |
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389 } |
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390 |
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391 /* Eject the CD-ROM */ |
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392 static int SDL_SYS_CDEject(SDL_CD *cdrom) |
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393 { |
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394 return(SDL_SYS_CDioctl(cdrom->id, CDIOCEJECT, 0)); |
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395 } |
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396 |
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397 /* Close the CD-ROM handle */ |
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398 static void SDL_SYS_CDClose(SDL_CD *cdrom) |
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399 { |
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400 close(cdrom->id); |
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401 } |
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402 |
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403 void SDL_SYS_CDQuit(void) |
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404 { |
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405 int i; |
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406 |
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407 if ( SDL_numcds > 0 ) { |
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408 for ( i=0; i<SDL_numcds; ++i ) { |
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409 SDL_free(SDL_cdlist[i]); |
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410 } |
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411 SDL_numcds = 0; |
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412 } |
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413 } |
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414 |
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415 #endif /* SDL_CDROM_OPENBSD */ |