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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_QNX |
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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/stat.h> |
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30 #include <sys/ioctl.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/cdrom.h> |
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35 #include <sys/dcmd_cam.h> |
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36 |
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37 #include "SDL_timer.h" |
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38 #include "SDL_cdrom.h" |
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39 #include "../SDL_syscdrom.h" |
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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 #define QNX_CD_OPENMODE O_RDONLY | O_EXCL |
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45 |
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46 /* A list of available CD-ROM drives */ |
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47 static char *SDL_cdlist[MAX_DRIVES]; |
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48 static dev_t SDL_cdmode[MAX_DRIVES]; |
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49 static int SDL_cdopen[MAX_DRIVES]; |
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50 |
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51 /* The system-dependent CD control functions */ |
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52 static const char *SDL_SYS_CDName(int drive); |
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53 static int SDL_SYS_CDOpen(int drive); |
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54 static int SDL_SYS_CDGetTOC(SDL_CD *cdrom); |
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55 static CDstatus SDL_SYS_CDStatus(SDL_CD *cdrom, int *position); |
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56 static int SDL_SYS_CDPlay(SDL_CD *cdrom, int start, int length); |
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57 static int SDL_SYS_CDPause(SDL_CD *cdrom); |
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58 static int SDL_SYS_CDResume(SDL_CD *cdrom); |
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59 static int SDL_SYS_CDStop(SDL_CD *cdrom); |
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60 static int SDL_SYS_CDEject(SDL_CD *cdrom); |
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61 static void SDL_SYS_CDClose(SDL_CD *cdrom); |
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62 |
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63 /* Check a drive to see if it is a CD-ROM */ |
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64 static int CheckDrive(char *drive, struct stat *stbuf) |
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65 { |
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66 int is_cd, cdfd; |
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67 cam_devinfo_t dinfo; |
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68 int devctlret=0; |
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69 |
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70 int atapi; |
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71 int removable; |
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72 int cdb10; |
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73 |
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74 /* If it doesn't exist, return -1 */ |
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75 if (stat(drive, stbuf) < 0) |
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76 { |
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77 return(-1); |
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78 } |
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79 |
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80 /* If it does exist, verify that it's an available CD-ROM */ |
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81 is_cd = 0; |
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82 |
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83 if (S_ISCHR(stbuf->st_mode) || S_ISBLK(stbuf->st_mode)) |
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84 { |
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85 cdfd = open(drive, QNX_CD_OPENMODE); |
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86 if ( cdfd >= 0 ) |
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87 { |
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88 devctlret=devctl(cdfd, DCMD_CAM_DEVINFO, &dinfo, sizeof(cam_devinfo_t), NULL); |
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89 |
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90 if (devctlret==EOK) |
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91 { |
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92 atapi=dinfo.flags & DEV_ATAPI; |
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93 removable=dinfo.flags & DEV_REMOVABLE; |
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94 cdb10=dinfo.flags & DEV_CDB_10; /* I'm not sure about that flag */ |
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95 |
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96 /* in the near future need to add more checks for splitting cdroms from other devices */ |
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97 if ((atapi)&&(removable)) |
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98 { |
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99 is_cd = 1; |
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100 } |
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101 } |
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102 |
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103 close(cdfd); |
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104 } |
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105 } |
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106 return(is_cd); |
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107 } |
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108 |
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109 /* Add a CD-ROM drive to our list of valid drives */ |
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110 static void AddDrive(char *drive, struct stat *stbuf) |
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111 { |
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112 int i; |
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113 |
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114 if (SDL_numcds < MAX_DRIVES) |
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115 { |
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116 /* Check to make sure it's not already in our list. |
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117 This can happen when we see a drive via symbolic link. */ |
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118 |
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119 for (i=0; i<SDL_numcds; ++i) |
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120 { |
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121 if (stbuf->st_rdev == SDL_cdmode[i]) |
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122 { |
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123 return; |
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124 } |
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125 } |
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126 |
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127 /* Add this drive to our list */ |
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128 |
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129 i = SDL_numcds; |
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130 SDL_cdlist[i] = SDL_strdup(drive); |
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131 if (SDL_cdlist[i] == NULL) |
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132 { |
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133 SDL_OutOfMemory(); |
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134 return; |
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135 } |
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136 SDL_cdmode[i] = stbuf->st_rdev; |
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137 ++SDL_numcds; |
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138 } |
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139 } |
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140 |
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141 int SDL_SYS_CDInit(void) |
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142 { |
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143 /* checklist: /dev/cdrom, /dev/cd?, /dev/scd? */ |
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144 static char *checklist[]={"cdrom", "?0 cd?", "?1 cd?", "?0 scd?", NULL}; |
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145 |
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146 char *SDLcdrom; |
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147 int i, j, exists; |
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148 char drive[32]; |
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149 struct stat stbuf; |
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150 |
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151 /* Fill in our driver capabilities */ |
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152 SDL_CDcaps.Name = SDL_SYS_CDName; |
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153 SDL_CDcaps.Open = SDL_SYS_CDOpen; |
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154 SDL_CDcaps.GetTOC = SDL_SYS_CDGetTOC; |
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155 SDL_CDcaps.Status = SDL_SYS_CDStatus; |
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156 SDL_CDcaps.Play = SDL_SYS_CDPlay; |
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157 SDL_CDcaps.Pause = SDL_SYS_CDPause; |
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158 SDL_CDcaps.Resume = SDL_SYS_CDResume; |
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159 SDL_CDcaps.Stop = SDL_SYS_CDStop; |
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160 SDL_CDcaps.Eject = SDL_SYS_CDEject; |
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161 SDL_CDcaps.Close = SDL_SYS_CDClose; |
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162 |
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163 /* clearing device open status */ |
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164 for (i=0; i<MAX_DRIVES; i++) |
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165 { |
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166 SDL_cdopen[i]=0; |
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167 } |
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168 |
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169 /* Look in the environment for our CD-ROM drive list */ |
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170 SDLcdrom = SDL_getenv("SDL_CDROM"); /* ':' separated list of devices */ |
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171 if ( SDLcdrom != NULL ) |
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172 { |
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173 char *cdpath, *delim; |
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174 size_t len = SDL_strlen(SDLcdrom)+1; |
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175 cdpath = SDL_stack_alloc(char, len); |
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176 if (cdpath != NULL) |
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177 { |
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178 SDL_strlcpy(cdpath, SDLcdrom, len); |
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179 SDLcdrom = cdpath; |
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180 do { |
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181 delim = SDL_strchr(SDLcdrom, ':'); |
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182 if (delim) |
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183 { |
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184 *delim++ = '\0'; |
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185 } |
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186 if (CheckDrive(SDLcdrom, &stbuf) > 0) |
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187 { |
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188 AddDrive(SDLcdrom, &stbuf); |
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189 } |
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190 if (delim) |
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191 { |
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192 SDLcdrom = delim; |
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193 } |
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194 else |
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195 { |
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196 SDLcdrom = NULL; |
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197 } |
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198 } while (SDLcdrom); |
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199 SDL_stack_free(cdpath); |
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200 } |
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201 |
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202 /* If we found our drives, there's nothing left to do */ |
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203 if (SDL_numcds > 0) |
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204 { |
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205 return(0); |
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206 } |
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207 } |
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208 |
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209 /* Scan the system for CD-ROM drives */ |
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210 for ( i=0; checklist[i]; ++i ) |
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211 { |
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212 if (checklist[i][0] == '?') |
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213 { |
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214 char* insert; |
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215 exists = 1; |
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216 |
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217 for ( j=checklist[i][1]; exists; ++j ) |
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218 { |
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219 SDL_snprintf(drive, SDL_arraysize(drive), "/dev/%s", &checklist[i][3]); |
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220 insert = SDL_strchr(drive, '?'); |
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221 if (insert != NULL) |
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222 { |
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223 *insert = j; |
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224 } |
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225 switch (CheckDrive(drive, &stbuf)) |
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226 { |
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227 /* Drive exists and is a CD-ROM */ |
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228 case 1: |
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229 AddDrive(drive, &stbuf); |
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230 break; |
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231 /* Drive exists, but isn't a CD-ROM */ |
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232 case 0: |
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233 break; |
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234 /* Drive doesn't exist */ |
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235 case -1: |
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236 exists = 0; |
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237 break; |
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238 } |
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239 } |
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240 } |
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241 else |
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242 { |
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243 SDL_snprintf(drive, SDL_arraysize(drive), "/dev/%s", checklist[i]); |
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244 if (CheckDrive(drive, &stbuf) > 0) |
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245 { |
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246 AddDrive(drive, &stbuf); |
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247 } |
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248 } |
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249 } |
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250 return(0); |
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251 } |
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252 |
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253 static const char *SDL_SYS_CDName(int drive) |
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254 { |
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255 return(SDL_cdlist[drive]); |
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256 } |
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257 |
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258 static int SDL_SYS_CDOpen(int drive) |
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259 { |
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260 int handle; |
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261 |
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262 handle=open(SDL_cdlist[drive], QNX_CD_OPENMODE); |
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263 |
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264 if (handle>0) |
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265 { |
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266 SDL_cdopen[drive]=handle; |
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267 } |
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268 |
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269 return (handle); |
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270 } |
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271 |
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272 static int SDL_SYS_CDGetTOC(SDL_CD *cdrom) |
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273 { |
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274 cdrom_read_toc_t toc; |
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275 int i, okay; |
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276 |
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277 okay = 0; |
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278 if (devctl(cdrom->id, DCMD_CAM_CDROMREADTOC, &toc, sizeof(toc), NULL) == 0) |
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279 { |
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280 cdrom->numtracks = toc.last_track - toc.first_track + 1; |
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281 if (cdrom->numtracks > SDL_MAX_TRACKS) |
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282 { |
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283 cdrom->numtracks = SDL_MAX_TRACKS; |
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284 } |
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285 /* Read all the track TOC entries */ |
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286 for (i=0; i<=cdrom->numtracks; ++i) |
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287 { |
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288 if (i == cdrom->numtracks) |
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289 { |
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290 cdrom->track[i].id = CDROM_LEADOUT; |
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291 } |
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292 else |
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293 { |
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294 cdrom->track[i].id = toc.first_track+i; |
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295 } |
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296 |
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297 cdrom->track[i].type = toc.toc_entry[i].control_adr & 0x0F; |
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298 cdrom->track[i].offset = toc.toc_entry[i].addr.lba; |
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299 cdrom->track[i].length = 0; |
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300 |
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301 if (i > 0) |
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302 { |
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303 cdrom->track[i-1].length = cdrom->track[i].offset-cdrom->track[i-1].offset; |
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304 } |
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305 } |
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306 if (i == (cdrom->numtracks+1)) |
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307 { |
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308 okay = 1; |
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309 } |
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310 } |
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311 return (okay ? 0 : -1); |
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312 } |
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313 |
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314 /* Get CD-ROM status */ |
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315 static CDstatus SDL_SYS_CDStatus(SDL_CD *cdrom, int *position) |
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316 { |
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317 CDstatus status; |
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318 |
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319 cdrom_read_toc_t toc; |
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320 cdrom_subch_data_t info; |
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321 cam_devinfo_t dinfo; |
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322 |
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323 int devctlret=0; |
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324 int drive=-1; |
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325 int i; |
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326 int eagaincnt=0; |
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327 |
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328 /* check media presence before read subchannel call, some cdroms can lockups */ |
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329 /* if no media, while calling read subchannel functions. */ |
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330 devctlret=devctl(cdrom->id, DCMD_CAM_DEVINFO, &dinfo, sizeof(cam_devinfo_t), NULL); |
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331 |
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332 if (devctlret==EOK) |
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333 { |
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334 if ((dinfo.flags & DEV_NO_MEDIA)!=0) |
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335 { |
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336 status = CD_TRAYEMPTY; |
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337 if (position) |
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338 { |
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339 *position = 0; |
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340 } |
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341 return (status); |
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342 } |
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343 } |
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344 |
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345 /* if media exists, then do other stuff */ |
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346 |
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347 SDL_memset(&info, 0x00, sizeof(info)); |
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348 info.subch_command.data_format = CDROM_SUBCH_CURRENT_POSITION; |
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349 |
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350 do { |
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351 devctlret=devctl(cdrom->id, DCMD_CAM_CDROMSUBCHNL, &info, sizeof(info), NULL); |
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352 if (devctlret==EIO) |
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353 { |
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354 /* big workaround for media change, handle is unusable after that, |
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355 that bug was found in QNX 6.2, 6.2.1 is not released yet. */ |
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356 |
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357 for (i=0; i<MAX_DRIVES; i++) |
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358 { |
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359 if (SDL_cdopen[i]==cdrom->id) |
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360 { |
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361 drive=i; |
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362 break; |
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363 } |
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364 } |
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365 if (drive==-1) |
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366 { |
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367 /* that cannot happen, but ... */ |
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368 break; |
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369 } |
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370 close(cdrom->id); |
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371 cdrom->id=open(SDL_cdlist[drive], QNX_CD_OPENMODE); |
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372 devctlret=EAGAIN; |
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373 } |
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374 if (devctlret==EAGAIN) |
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375 { |
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376 eagaincnt++; |
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377 } |
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378 if (eagaincnt==2) |
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379 { |
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380 /* workaround for broken cdroms, which can return always EAGAIN when its not ready, */ |
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381 /* that mean errornous media or just no media avail */ |
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382 devctlret=ENXIO; |
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383 break; |
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384 } |
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385 } while ((devctlret==EAGAIN)||(devctlret==ESTALE)); |
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386 |
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387 if (devctlret != 0) |
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388 { |
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389 if (devctlret==ENXIO) |
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390 { |
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391 status = CD_TRAYEMPTY; |
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392 } |
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393 else |
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394 { |
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395 status = CD_ERROR; |
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396 } |
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397 } |
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398 else |
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399 { |
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400 switch (info.current_position.header.audio_status) |
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401 { |
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402 case CDROM_AUDIO_INVALID: |
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403 case CDROM_AUDIO_NO_STATUS: |
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404 /* Try to determine if there's a CD available */ |
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405 if (devctl(cdrom->id, DCMD_CAM_CDROMREADTOC, &toc, sizeof(toc), NULL)==0) |
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406 status = CD_STOPPED; |
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407 else |
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408 status = CD_TRAYEMPTY; |
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409 break; |
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410 case CDROM_AUDIO_COMPLETED: |
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411 status = CD_STOPPED; |
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412 break; |
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413 case CDROM_AUDIO_PLAY: |
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414 status = CD_PLAYING; |
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415 break; |
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416 case CDROM_AUDIO_PAUSED: |
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417 /* Workaround buggy CD-ROM drive */ |
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418 if (info.current_position.data_format == CDROM_LEADOUT) |
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419 { |
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420 status = CD_STOPPED; |
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421 } |
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422 else |
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423 { |
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424 status = CD_PAUSED; |
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425 } |
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426 break; |
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427 default: |
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428 status = CD_ERROR; |
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429 break; |
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430 } |
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431 } |
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432 |
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433 if (position) |
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434 { |
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435 if (status==CD_PLAYING || (status==CD_PAUSED)) |
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436 { |
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437 *position = MSF_TO_FRAMES(info.current_position.addr.msf.minute, |
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438 info.current_position.addr.msf.second, |
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439 info.current_position.addr.msf.frame); |
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440 } |
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441 else |
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442 { |
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443 *position = 0; |
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444 } |
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445 } |
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446 |
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447 return (status); |
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448 } |
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449 |
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450 /* Start play */ |
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451 static int SDL_SYS_CDPlay(SDL_CD *cdrom, int start, int length) |
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452 { |
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453 cdrom_playmsf_t playtime; |
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454 |
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455 FRAMES_TO_MSF(start, &playtime.start_minute, &playtime.start_second, &playtime.start_frame); |
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456 FRAMES_TO_MSF(start+length, &playtime.end_minute, &playtime.end_second, &playtime.end_frame); |
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457 |
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458 if (devctl(cdrom->id, DCMD_CAM_CDROMPLAYMSF, &playtime, sizeof(playtime), NULL) != 0) |
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459 { |
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460 return -1; |
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461 } |
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462 else |
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463 { |
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464 return 0; |
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465 } |
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466 } |
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467 |
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468 /* Pause play */ |
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469 static int SDL_SYS_CDPause(SDL_CD *cdrom) |
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470 { |
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471 if (devctl(cdrom->id, DCMD_CAM_CDROMPAUSE, NULL, 0, NULL)!=0) |
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472 { |
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473 return -1; |
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474 } |
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475 else |
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476 { |
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477 return 0; |
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478 } |
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479 } |
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480 |
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481 /* Resume play */ |
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482 static int SDL_SYS_CDResume(SDL_CD *cdrom) |
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483 { |
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484 if (devctl(cdrom->id, DCMD_CAM_CDROMRESUME, NULL, 0, NULL)!=0) |
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485 { |
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486 return -1; |
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487 } |
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488 else |
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489 { |
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490 return 0; |
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491 } |
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492 } |
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493 |
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494 /* Stop play */ |
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495 static int SDL_SYS_CDStop(SDL_CD *cdrom) |
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496 { |
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497 if (devctl(cdrom->id, DCMD_CAM_CDROMSTOP, NULL, 0, NULL)!=0) |
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498 { |
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499 return -1; |
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500 } |
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501 else |
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502 { |
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503 return 0; |
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504 } |
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505 } |
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506 |
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507 /* Eject the CD-ROM */ |
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508 static int SDL_SYS_CDEject(SDL_CD *cdrom) |
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509 { |
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510 if (devctl(cdrom->id, DCMD_CAM_EJECT_MEDIA, NULL, 0, NULL)!=0) |
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511 { |
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512 return -1; |
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513 } |
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514 else |
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515 { |
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516 return 0; |
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517 } |
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518 } |
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519 |
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520 /* Close the CD-ROM handle */ |
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521 static void SDL_SYS_CDClose(SDL_CD *cdrom) |
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522 { |
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523 int i; |
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524 |
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525 for (i=0; i<MAX_DRIVES; i++) |
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526 { |
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527 if (SDL_cdopen[i]==cdrom->id) |
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528 { |
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529 SDL_cdopen[i]=0; |
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530 break; |
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531 } |
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532 } |
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533 |
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534 close(cdrom->id); |
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535 } |
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536 |
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537 void SDL_SYS_CDQuit(void) |
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538 { |
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539 int i; |
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540 |
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541 if (SDL_numcds > 0) |
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542 { |
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543 for (i=0; i<SDL_numcds; ++i) |
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544 { |
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545 SDL_free(SDL_cdlist[i]); |
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546 } |
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547 SDL_numcds = 0; |
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548 } |
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549 } |
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550 |
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551 #endif /* SDL_CDROM_QNX */ |