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1 /*
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2 SDL - Simple DirectMedia Layer
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3 Copyright (C) 1997, 1998, 1999, 2000, 2001 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@devolution.com
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21 */
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22
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23 #ifdef SAVE_RCSID
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24 static char rcsid =
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25 "@(#) $Id$";
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26 #endif
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27
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28 /* Functions for system-level CD-ROM audio control */
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29
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30 #include <stdlib.h>
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31 #include <stdio.h>
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32 #include <windows.h>
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33 #include <mmsystem.h>
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34
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35 #include "SDL_error.h"
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36 #include "SDL_cdrom.h"
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37 #include "SDL_syscdrom.h"
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38
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39 /* This really broken?? */
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40 #define BROKEN_MCI_PAUSE /* Pausing actually stops play -- Doh! */
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41
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42 /* The maximum number of CD-ROM drives we'll detect (Don't change!) */
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43 #define MAX_DRIVES 26
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44
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45 /* A list of available CD-ROM drives */
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46 static char *SDL_cdlist[MAX_DRIVES];
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47 static MCIDEVICEID SDL_mciID[MAX_DRIVES];
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48 #ifdef BROKEN_MCI_PAUSE
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49 static int SDL_paused[MAX_DRIVES];
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50 #endif
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51
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52 /* The system-dependent CD control functions */
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53 static const char *SDL_SYS_CDName(int drive);
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54 static int SDL_SYS_CDOpen(int drive);
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55 static int SDL_SYS_CDGetTOC(SDL_CD *cdrom);
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56 static CDstatus SDL_SYS_CDStatus(SDL_CD *cdrom, int *position);
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57 static int SDL_SYS_CDPlay(SDL_CD *cdrom, int start, int length);
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58 static int SDL_SYS_CDPause(SDL_CD *cdrom);
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59 static int SDL_SYS_CDResume(SDL_CD *cdrom);
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60 static int SDL_SYS_CDStop(SDL_CD *cdrom);
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61 static int SDL_SYS_CDEject(SDL_CD *cdrom);
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62 static void SDL_SYS_CDClose(SDL_CD *cdrom);
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63
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64
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65 /* Add a CD-ROM drive to our list of valid drives */
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66 static void AddDrive(char *drive)
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67 {
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68 int i;
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69
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70 if ( SDL_numcds < MAX_DRIVES ) {
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71 /* Add this drive to our list */
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72 i = SDL_numcds;
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73 SDL_cdlist[i] = (char *)malloc(strlen(drive)+1);
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74 if ( SDL_cdlist[i] == NULL ) {
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75 SDL_OutOfMemory();
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76 return;
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77 }
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78 strcpy(SDL_cdlist[i], drive);
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79 ++SDL_numcds;
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80 #ifdef CDROM_DEBUG
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81 fprintf(stderr, "Added CD-ROM drive: %s\n", drive);
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82 #endif
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83 }
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84 }
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85
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86 int SDL_SYS_CDInit(void)
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87 {
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88 /* checklist: Drive 'A' - 'Z' */
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89 int i;
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90 char drive[4];
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91
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92 /* Fill in our driver capabilities */
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93 SDL_CDcaps.Name = SDL_SYS_CDName;
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94 SDL_CDcaps.Open = SDL_SYS_CDOpen;
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95 SDL_CDcaps.GetTOC = SDL_SYS_CDGetTOC;
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96 SDL_CDcaps.Status = SDL_SYS_CDStatus;
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97 SDL_CDcaps.Play = SDL_SYS_CDPlay;
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98 SDL_CDcaps.Pause = SDL_SYS_CDPause;
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99 SDL_CDcaps.Resume = SDL_SYS_CDResume;
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100 SDL_CDcaps.Stop = SDL_SYS_CDStop;
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101 SDL_CDcaps.Eject = SDL_SYS_CDEject;
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102 SDL_CDcaps.Close = SDL_SYS_CDClose;
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103
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104 /* Scan the system for CD-ROM drives */
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105 for ( i='A'; i<='Z'; ++i ) {
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106 sprintf(drive, "%c:\\", i);
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107 if ( GetDriveType(drive) == DRIVE_CDROM ) {
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108 AddDrive(drive);
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109 }
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110 }
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111 memset(SDL_mciID, 0, sizeof(SDL_mciID));
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112 return(0);
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113 }
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114
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115 /* General ioctl() CD-ROM command function */
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116 static int SDL_SYS_CDioctl(int id, UINT msg, DWORD flags, void *arg)
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117 {
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118 MCIERROR mci_error;
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119
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120 mci_error = mciSendCommand(SDL_mciID[id], msg, flags, (DWORD)arg);
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121 if ( mci_error ) {
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122 char error[256];
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123
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124 mciGetErrorString(mci_error, error, 256);
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125 SDL_SetError("mciSendCommand() error: %s", error);
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126 }
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127 return(!mci_error ? 0 : -1);
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128 }
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129
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130 static const char *SDL_SYS_CDName(int drive)
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131 {
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132 return(SDL_cdlist[drive]);
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133 }
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134
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135 static int SDL_SYS_CDOpen(int drive)
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136 {
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137 MCI_OPEN_PARMS mci_open;
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138 MCI_SET_PARMS mci_set;
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139 char device[3];
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140 DWORD flags;
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141
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142 /* Open the requested device */
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143 mci_open.lpstrDeviceType = (LPCSTR) MCI_DEVTYPE_CD_AUDIO;
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144 device[0] = *SDL_cdlist[drive];
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145 device[1] = ':';
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146 device[2] = '\0';
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147 mci_open.lpstrElementName = device;
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148 flags =
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149 (MCI_OPEN_TYPE|MCI_OPEN_SHAREABLE|MCI_OPEN_TYPE_ID|MCI_OPEN_ELEMENT);
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150 if ( SDL_SYS_CDioctl(0, MCI_OPEN, flags, &mci_open) < 0 ) {
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151 flags &= ~MCI_OPEN_SHAREABLE;
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152 if ( SDL_SYS_CDioctl(0, MCI_OPEN, flags, &mci_open) < 0 ) {
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153 return(-1);
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154 }
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155 }
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156 SDL_mciID[drive] = mci_open.wDeviceID;
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157
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158 /* Set the minute-second-frame time format */
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159 mci_set.dwTimeFormat = MCI_FORMAT_MSF;
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160 SDL_SYS_CDioctl(drive, MCI_SET, MCI_SET_TIME_FORMAT, &mci_set);
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161
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162 #ifdef BROKEN_MCI_PAUSE
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163 SDL_paused[drive] = 0;
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164 #endif
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165 return(drive);
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166 }
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167
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168 static int SDL_SYS_CDGetTOC(SDL_CD *cdrom)
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169 {
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170 MCI_STATUS_PARMS mci_status;
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171 int i, okay;
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172 DWORD flags;
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173
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174 okay = 0;
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175 mci_status.dwItem = MCI_STATUS_NUMBER_OF_TRACKS;
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176 flags = MCI_STATUS_ITEM | MCI_WAIT;
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177 if ( SDL_SYS_CDioctl(cdrom->id, MCI_STATUS, flags, &mci_status) == 0 ) {
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178 cdrom->numtracks = mci_status.dwReturn;
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179 if ( cdrom->numtracks > SDL_MAX_TRACKS ) {
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180 cdrom->numtracks = SDL_MAX_TRACKS;
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181 }
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182 /* Read all the track TOC entries */
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183 flags = MCI_STATUS_ITEM | MCI_TRACK | MCI_WAIT;
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184 for ( i=0; i<cdrom->numtracks; ++i ) {
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185 cdrom->track[i].id = i+1;
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186 mci_status.dwTrack = cdrom->track[i].id;
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187 #ifdef MCI_CDA_STATUS_TYPE_TRACK
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188 mci_status.dwItem = MCI_CDA_STATUS_TYPE_TRACK;
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189 if ( SDL_SYS_CDioctl(cdrom->id, MCI_STATUS, flags,
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190 &mci_status) < 0 ) {
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191 break;
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192 }
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193 if ( mci_status.dwReturn == MCI_CDA_TRACK_AUDIO ) {
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194 cdrom->track[i].type = SDL_AUDIO_TRACK;
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195 } else {
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196 cdrom->track[i].type = SDL_DATA_TRACK;
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197 }
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198 #else
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199 cdrom->track[i].type = SDL_AUDIO_TRACK;
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200 #endif
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201 mci_status.dwItem = MCI_STATUS_POSITION;
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202 if ( SDL_SYS_CDioctl(cdrom->id, MCI_STATUS, flags,
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203 &mci_status) < 0 ) {
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204 break;
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205 }
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206 cdrom->track[i].offset = MSF_TO_FRAMES(
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207 MCI_MSF_MINUTE(mci_status.dwReturn),
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208 MCI_MSF_SECOND(mci_status.dwReturn),
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209 MCI_MSF_FRAME(mci_status.dwReturn));
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210 cdrom->track[i].length = 0;
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211 if ( i > 0 ) {
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212 cdrom->track[i-1].length =
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213 cdrom->track[i].offset-
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214 cdrom->track[i-1].offset;
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215 }
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216 }
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217 if ( i == cdrom->numtracks ) {
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218 flags &= ~MCI_TRACK;
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219 mci_status.dwItem = MCI_STATUS_LENGTH;
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220 if ( SDL_SYS_CDioctl(cdrom->id, MCI_STATUS, flags,
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221 &mci_status) == 0 ) {
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222 cdrom->track[i].offset = MSF_TO_FRAMES(
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223 MCI_MSF_MINUTE(mci_status.dwReturn),
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224 MCI_MSF_SECOND(mci_status.dwReturn),
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225 MCI_MSF_FRAME(mci_status.dwReturn));
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226 cdrom->track[i].length = 0;
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227 cdrom->track[i-1].length =
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228 cdrom->track[i].offset-
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229 cdrom->track[i-1].offset;
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230 okay = 1;
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231 }
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232 }
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233 }
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234 return(okay ? 0 : -1);
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235 }
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236
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237 /* Get CD-ROM status */
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238 static CDstatus SDL_SYS_CDStatus(SDL_CD *cdrom, int *position)
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239 {
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240 CDstatus status;
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241 MCI_STATUS_PARMS mci_status;
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242 DWORD flags;
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243
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244 flags = MCI_STATUS_ITEM | MCI_WAIT;
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245 mci_status.dwItem = MCI_STATUS_MODE;
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246 if ( SDL_SYS_CDioctl(cdrom->id, MCI_STATUS, flags, &mci_status) < 0 ) {
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247 status = CD_ERROR;
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248 } else {
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249 switch (mci_status.dwReturn) {
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250 case MCI_MODE_NOT_READY:
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251 case MCI_MODE_OPEN:
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252 status = CD_TRAYEMPTY;
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253 break;
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254 case MCI_MODE_STOP:
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255 #ifdef BROKEN_MCI_PAUSE
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256 if ( SDL_paused[cdrom->id] ) {
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257 status = CD_PAUSED;
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258 } else {
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259 status = CD_STOPPED;
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260 }
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261 #else
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262 status = CD_STOPPED;
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263 #endif /* BROKEN_MCI_PAUSE */
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264 break;
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265 case MCI_MODE_PLAY:
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266 status = CD_PLAYING;
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267 break;
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268 case MCI_MODE_PAUSE:
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269 status = CD_PAUSED;
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270 break;
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271 default:
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272 status = CD_ERROR;
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273 break;
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274 }
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275 }
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276 if ( position ) {
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277 if ( status == CD_PLAYING || (status == CD_PAUSED) ) {
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278 mci_status.dwItem = MCI_STATUS_POSITION;
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279 if ( SDL_SYS_CDioctl(cdrom->id, MCI_STATUS, flags,
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280 &mci_status) == 0 ) {
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281 *position = MSF_TO_FRAMES(
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282 MCI_MSF_MINUTE(mci_status.dwReturn),
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283 MCI_MSF_SECOND(mci_status.dwReturn),
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284 MCI_MSF_FRAME(mci_status.dwReturn));
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285 } else {
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286 *position = 0;
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287 }
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288 } else {
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289 *position = 0;
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290 }
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291 }
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292 return(status);
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293 }
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294
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295 /* Start play */
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296 static int SDL_SYS_CDPlay(SDL_CD *cdrom, int start, int length)
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297 {
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298 MCI_PLAY_PARMS mci_play;
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299 int m, s, f;
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300 DWORD flags;
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301
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302 flags = MCI_FROM | MCI_TO | MCI_NOTIFY;
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303 mci_play.dwCallback = 0;
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304 FRAMES_TO_MSF(start, &m, &s, &f);
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305 mci_play.dwFrom = MCI_MAKE_MSF(m, s, f);
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306 FRAMES_TO_MSF(start+length, &m, &s, &f);
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307 mci_play.dwTo = MCI_MAKE_MSF(m, s, f);
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308 return(SDL_SYS_CDioctl(cdrom->id, MCI_PLAY, flags, &mci_play));
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309 }
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310
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311 /* Pause play */
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312 static int SDL_SYS_CDPause(SDL_CD *cdrom)
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313 {
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314 #ifdef BROKEN_MCI_PAUSE
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315 SDL_paused[cdrom->id] = 1;
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316 #endif
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317 return(SDL_SYS_CDioctl(cdrom->id, MCI_PAUSE, MCI_WAIT, NULL));
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318 }
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319
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320 /* Resume play */
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321 static int SDL_SYS_CDResume(SDL_CD *cdrom)
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322 {
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323 #ifdef BROKEN_MCI_PAUSE
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324 MCI_STATUS_PARMS mci_status;
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325 int okay;
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326 int flags;
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327
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328 okay = 0;
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329 /* Play from the current play position to end of CD */
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330 flags = MCI_STATUS_ITEM | MCI_WAIT;
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331 mci_status.dwItem = MCI_STATUS_POSITION;
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332 if ( SDL_SYS_CDioctl(cdrom->id, MCI_STATUS, flags, &mci_status) == 0 ) {
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333 MCI_PLAY_PARMS mci_play;
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334
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335 flags = MCI_FROM | MCI_NOTIFY;
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336 mci_play.dwCallback = 0;
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337 mci_play.dwFrom = mci_status.dwReturn;
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338 if (SDL_SYS_CDioctl(cdrom->id,MCI_PLAY,flags,&mci_play) == 0) {
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339 okay = 1;
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340 SDL_paused[cdrom->id] = 0;
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341 }
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342 }
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343 return(okay ? 0 : -1);
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344 #else
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345 return(SDL_SYS_CDioctl(cdrom->id, MCI_RESUME, MCI_WAIT, NULL));
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346 #endif /* BROKEN_MCI_PAUSE */
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347 }
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348
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349 /* Stop play */
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350 static int SDL_SYS_CDStop(SDL_CD *cdrom)
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351 {
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352 return(SDL_SYS_CDioctl(cdrom->id, MCI_STOP, MCI_WAIT, NULL));
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353 }
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354
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355 /* Eject the CD-ROM */
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356 static int SDL_SYS_CDEject(SDL_CD *cdrom)
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357 {
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358 return(SDL_SYS_CDioctl(cdrom->id, MCI_SET, MCI_SET_DOOR_OPEN, NULL));
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359 }
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360
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361 /* Close the CD-ROM handle */
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362 static void SDL_SYS_CDClose(SDL_CD *cdrom)
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363 {
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364 SDL_SYS_CDioctl(cdrom->id, MCI_CLOSE, MCI_WAIT, NULL);
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365 }
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366
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367 void SDL_SYS_CDQuit(void)
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368 {
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369 int i;
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370
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371 if ( SDL_numcds > 0 ) {
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372 for ( i=0; i<SDL_numcds; ++i ) {
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373 free(SDL_cdlist[i]);
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374 }
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375 SDL_numcds = 0;
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376 }
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377 }
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