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annotate src/cdrom/win32/SDL_syscdrom.c @ 1669:9857d21967bb SDL-1.3

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The test programs compile again. The dummy video driver is partially functional now.
author Sam Lantinga <slouken@libsdl.org>
date Mon, 29 May 2006 05:08:33 +0000
parents 4da1ee79c9af
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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_WIN32
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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 #define WIN32_LEAN_AND_MEAN
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29 #include <windows.h>
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30 #include <mmsystem.h>
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31
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32 #include "SDL_cdrom.h"
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33 #include "../SDL_syscdrom.h"
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34
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35 /* This really broken?? */
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36 #define BROKEN_MCI_PAUSE /* Pausing actually stops play -- Doh! */
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37
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38 /* The maximum number of CD-ROM drives we'll detect (Don't change!) */
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39 #define MAX_DRIVES 26
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40
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41 /* A list of available CD-ROM drives */
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42 static char *SDL_cdlist[MAX_DRIVES];
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43 static MCIDEVICEID SDL_mciID[MAX_DRIVES];
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44 #ifdef BROKEN_MCI_PAUSE
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45 static int SDL_paused[MAX_DRIVES];
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46 #endif
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47 static int SDL_CD_end_position;
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48
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49 /* The system-dependent CD control functions */
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50 static const char *SDL_SYS_CDName(int drive);
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51 static int SDL_SYS_CDOpen(int drive);
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52 static int SDL_SYS_CDGetTOC(SDL_CD * cdrom);
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53 static CDstatus SDL_SYS_CDStatus(SDL_CD * cdrom, int *position);
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54 static int SDL_SYS_CDPlay(SDL_CD * cdrom, int start, int length);
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55 static int SDL_SYS_CDPause(SDL_CD * cdrom);
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56 static int SDL_SYS_CDResume(SDL_CD * cdrom);
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57 static int SDL_SYS_CDStop(SDL_CD * cdrom);
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58 static int SDL_SYS_CDEject(SDL_CD * cdrom);
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59 static void SDL_SYS_CDClose(SDL_CD * cdrom);
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60
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61
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62 /* Add a CD-ROM drive to our list of valid drives */
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63 static void
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64 AddDrive(char *drive)
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65 {
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66 int i;
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67
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68 if (SDL_numcds < MAX_DRIVES) {
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69 /* Add this drive to our list */
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70 i = SDL_numcds;
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71 SDL_cdlist[i] = SDL_strdup(drive);
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72 if (SDL_cdlist[i] == NULL) {
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73 SDL_OutOfMemory();
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74 return;
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75 }
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76 ++SDL_numcds;
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77 #ifdef CDROM_DEBUG
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78 fprintf(stderr, "Added CD-ROM drive: %s\n", drive);
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79 #endif
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80 }
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81 }
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82
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83 int
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84 SDL_SYS_CDInit(void)
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85 {
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86 /* checklist: Drive 'A' - 'Z' */
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87 int i;
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88 char drive[4];
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89
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90 /* Fill in our driver capabilities */
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91 SDL_CDcaps.Name = SDL_SYS_CDName;
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92 SDL_CDcaps.Open = SDL_SYS_CDOpen;
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93 SDL_CDcaps.GetTOC = SDL_SYS_CDGetTOC;
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94 SDL_CDcaps.Status = SDL_SYS_CDStatus;
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95 SDL_CDcaps.Play = SDL_SYS_CDPlay;
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96 SDL_CDcaps.Pause = SDL_SYS_CDPause;
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97 SDL_CDcaps.Resume = SDL_SYS_CDResume;
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98 SDL_CDcaps.Stop = SDL_SYS_CDStop;
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99 SDL_CDcaps.Eject = SDL_SYS_CDEject;
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100 SDL_CDcaps.Close = SDL_SYS_CDClose;
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101
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102 /* Scan the system for CD-ROM drives */
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103 for (i = 'A'; i <= 'Z'; ++i) {
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104 SDL_snprintf(drive, SDL_arraysize(drive), "%c:\\", i);
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105 if (GetDriveType(drive) == DRIVE_CDROM) {
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106 AddDrive(drive);
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107 }
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108 }
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109 SDL_memset(SDL_mciID, 0, sizeof(SDL_mciID));
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110 return (0);
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111 }
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112
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113 /* General ioctl() CD-ROM command function */
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114 static int
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115 SDL_SYS_CDioctl(int id, UINT msg, DWORD flags, void *arg)
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116 {
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117 MCIERROR mci_error;
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118
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119 mci_error = mciSendCommand(SDL_mciID[id], msg, flags, (DWORD_PTR) arg);
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120 if (mci_error) {
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121 char error[256];
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122
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123 mciGetErrorString(mci_error, error, 256);
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124 SDL_SetError("mciSendCommand() error: %s", error);
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125 }
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126 return (!mci_error ? 0 : -1);
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127 }
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128
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129 static const char *
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130 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
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136 SDL_SYS_CDOpen(int drive)
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137 {
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138 MCI_OPEN_PARMS mci_open;
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139 MCI_SET_PARMS mci_set;
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140 char device[3];
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141 DWORD flags;
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142
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143 /* Open the requested device */
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144 mci_open.lpstrDeviceType = (LPCSTR) MCI_DEVTYPE_CD_AUDIO;
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145 device[0] = *SDL_cdlist[drive];
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146 device[1] = ':';
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147 device[2] = '\0';
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148 mci_open.lpstrElementName = device;
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149 flags =
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150 (MCI_OPEN_TYPE | MCI_OPEN_SHAREABLE | MCI_OPEN_TYPE_ID |
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151 MCI_OPEN_ELEMENT);
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152 if (SDL_SYS_CDioctl(0, MCI_OPEN, flags, &mci_open) < 0) {
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153 flags &= ~MCI_OPEN_SHAREABLE;
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154 if (SDL_SYS_CDioctl(0, MCI_OPEN, flags, &mci_open) < 0) {
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155 return (-1);
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156 }
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157 }
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158 SDL_mciID[drive] = mci_open.wDeviceID;
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159
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160 /* Set the minute-second-frame time format */
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161 mci_set.dwTimeFormat = MCI_FORMAT_MSF;
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162 SDL_SYS_CDioctl(drive, MCI_SET, MCI_SET_TIME_FORMAT, &mci_set);
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163
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164 #ifdef BROKEN_MCI_PAUSE
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165 SDL_paused[drive] = 0;
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166 #endif
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167 return (drive);
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168 }
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169
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170 static int
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171 SDL_SYS_CDGetTOC(SDL_CD * cdrom)
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172 {
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173 MCI_STATUS_PARMS mci_status;
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174 int i, okay;
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175 DWORD flags;
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176
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177 okay = 0;
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178 mci_status.dwItem = MCI_STATUS_NUMBER_OF_TRACKS;
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179 flags = MCI_STATUS_ITEM | MCI_WAIT;
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180 if (SDL_SYS_CDioctl(cdrom->id, MCI_STATUS, flags, &mci_status) == 0) {
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181 cdrom->numtracks = mci_status.dwReturn;
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182 if (cdrom->numtracks > SDL_MAX_TRACKS) {
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183 cdrom->numtracks = SDL_MAX_TRACKS;
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184 }
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185 /* Read all the track TOC entries */
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186 flags = MCI_STATUS_ITEM | MCI_TRACK | MCI_WAIT;
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187 for (i = 0; i < cdrom->numtracks; ++i) {
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188 cdrom->track[i].id = i + 1;
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189 mci_status.dwTrack = cdrom->track[i].id;
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190 #ifdef MCI_CDA_STATUS_TYPE_TRACK
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191 mci_status.dwItem = MCI_CDA_STATUS_TYPE_TRACK;
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192 if (SDL_SYS_CDioctl(cdrom->id, MCI_STATUS, flags,
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193 &mci_status) < 0) {
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194 break;
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195 }
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196 if (mci_status.dwReturn == MCI_CDA_TRACK_AUDIO) {
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197 cdrom->track[i].type = SDL_AUDIO_TRACK;
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198 } else {
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199 cdrom->track[i].type = SDL_DATA_TRACK;
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200 }
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201 #else
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202 cdrom->track[i].type = SDL_AUDIO_TRACK;
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203 #endif
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204 mci_status.dwItem = MCI_STATUS_POSITION;
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205 if (SDL_SYS_CDioctl(cdrom->id, MCI_STATUS, flags,
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206 &mci_status) < 0) {
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207 break;
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208 }
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209 cdrom->track[i].offset =
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210 MSF_TO_FRAMES(MCI_MSF_MINUTE(mci_status.dwReturn),
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211 MCI_MSF_SECOND(mci_status.dwReturn),
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212 MCI_MSF_FRAME(mci_status.dwReturn));
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213 cdrom->track[i].length = 0;
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214 if (i > 0) {
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215 cdrom->track[i - 1].length =
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216 cdrom->track[i].offset - cdrom->track[i - 1].offset;
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217 }
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218 }
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219 if (i == cdrom->numtracks) {
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220 mci_status.dwTrack = cdrom->track[i - 1].id;
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221 mci_status.dwItem = MCI_STATUS_LENGTH;
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222 if (SDL_SYS_CDioctl(cdrom->id, MCI_STATUS, flags,
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223 &mci_status) == 0) {
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224 cdrom->track[i - 1].length =
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225 MSF_TO_FRAMES(MCI_MSF_MINUTE(mci_status.dwReturn),
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226 MCI_MSF_SECOND(mci_status.dwReturn),
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227 MCI_MSF_FRAME(mci_status.dwReturn));
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228 /* compute lead-out offset */
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229 cdrom->track[i].offset = cdrom->track[i - 1].offset +
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230 cdrom->track[i - 1].length;
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231 cdrom->track[i].length = 0;
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232 okay = 1;
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233 }
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234 }
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235 }
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236 return (okay ? 0 : -1);
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237 }
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238
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239 /* Get CD-ROM status */
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240 static CDstatus
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241 SDL_SYS_CDStatus(SDL_CD * cdrom, int *position)
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242 {
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243 CDstatus status;
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244 MCI_STATUS_PARMS mci_status;
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245 DWORD flags;
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246
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247 flags = MCI_STATUS_ITEM | MCI_WAIT;
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248 mci_status.dwItem = MCI_STATUS_MODE;
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249 if (SDL_SYS_CDioctl(cdrom->id, MCI_STATUS, flags, &mci_status) < 0) {
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250 status = CD_ERROR;
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251 } else {
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252 switch (mci_status.dwReturn) {
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253 case MCI_MODE_NOT_READY:
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254 case MCI_MODE_OPEN:
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255 status = CD_TRAYEMPTY;
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256 break;
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257 case MCI_MODE_STOP:
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258 #ifdef BROKEN_MCI_PAUSE
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259 if (SDL_paused[cdrom->id]) {
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260 status = CD_PAUSED;
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261 } else {
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262 status = CD_STOPPED;
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263 }
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264 #else
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265 status = CD_STOPPED;
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266 #endif /* BROKEN_MCI_PAUSE */
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267 break;
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268 case MCI_MODE_PLAY:
192
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269 #ifdef BROKEN_MCI_PAUSE
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270 if (SDL_paused[cdrom->id]) {
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271 status = CD_PAUSED;
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272 } else {
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273 status = CD_PLAYING;
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274 }
192
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275 #else
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276 status = CD_PLAYING;
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277 #endif /* BROKEN_MCI_PAUSE */
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278 break;
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279 case MCI_MODE_PAUSE:
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280 status = CD_PAUSED;
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281 break;
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282 default:
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283 status = CD_ERROR;
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284 break;
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285 }
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286 }
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287 if (position) {
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288 if (status == CD_PLAYING || (status == CD_PAUSED)) {
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289 mci_status.dwItem = MCI_STATUS_POSITION;
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290 if (SDL_SYS_CDioctl(cdrom->id, MCI_STATUS, flags,
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291 &mci_status) == 0) {
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292 *position =
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293 MSF_TO_FRAMES(MCI_MSF_MINUTE(mci_status.dwReturn),
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294 MCI_MSF_SECOND(mci_status.dwReturn),
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295 MCI_MSF_FRAME(mci_status.dwReturn));
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296 } else {
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297 *position = 0;
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298 }
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299 } else {
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300 *position = 0;
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301 }
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302 }
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303 return (status);
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304 }
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305
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306 /* Start play */
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307 static int
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308 SDL_SYS_CDPlay(SDL_CD * cdrom, int start, int length)
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309 {
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310 MCI_PLAY_PARMS mci_play;
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311 int m, s, f;
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312 DWORD flags;
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313
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314 flags = MCI_FROM | MCI_TO | MCI_NOTIFY;
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315 mci_play.dwCallback = 0;
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316 FRAMES_TO_MSF(start, &m, &s, &f);
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317 mci_play.dwFrom = MCI_MAKE_MSF(m, s, f);
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318 FRAMES_TO_MSF(start + length, &m, &s, &f);
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319 mci_play.dwTo = MCI_MAKE_MSF(m, s, f);
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320 SDL_CD_end_position = mci_play.dwTo;
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321 return (SDL_SYS_CDioctl(cdrom->id, MCI_PLAY, flags, &mci_play));
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322 }
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323
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324 /* Pause play */
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325 static int
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326 SDL_SYS_CDPause(SDL_CD * cdrom)
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327 {
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328 #ifdef BROKEN_MCI_PAUSE
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329 SDL_paused[cdrom->id] = 1;
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330 #endif
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331 return (SDL_SYS_CDioctl(cdrom->id, MCI_PAUSE, MCI_WAIT, NULL));
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332 }
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333
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334 /* Resume play */
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335 static int
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336 SDL_SYS_CDResume(SDL_CD * cdrom)
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337 {
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338 #ifdef BROKEN_MCI_PAUSE
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339 MCI_STATUS_PARMS mci_status;
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340 int okay;
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341 int flags;
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342
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343 okay = 0;
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344 /* Play from the current play position to the end position set earlier */
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345 flags = MCI_STATUS_ITEM | MCI_WAIT;
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346 mci_status.dwItem = MCI_STATUS_POSITION;
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347 if (SDL_SYS_CDioctl(cdrom->id, MCI_STATUS, flags, &mci_status) == 0) {
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348 MCI_PLAY_PARMS mci_play;
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349
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350 flags = MCI_FROM | MCI_TO | MCI_NOTIFY;
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351 mci_play.dwCallback = 0;
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352 mci_play.dwFrom = mci_status.dwReturn;
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353 mci_play.dwTo = SDL_CD_end_position;
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354 if (SDL_SYS_CDioctl(cdrom->id, MCI_PLAY, flags, &mci_play) == 0) {
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355 okay = 1;
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356 SDL_paused[cdrom->id] = 0;
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357 }
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358 }
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359 return (okay ? 0 : -1);
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360 #else
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361 return (SDL_SYS_CDioctl(cdrom->id, MCI_RESUME, MCI_WAIT, NULL));
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362 #endif /* BROKEN_MCI_PAUSE */
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363 }
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364
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365 /* Stop play */
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366 static int
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367 SDL_SYS_CDStop(SDL_CD * cdrom)
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368 {
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369 return (SDL_SYS_CDioctl(cdrom->id, MCI_STOP, MCI_WAIT, NULL));
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370 }
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371
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372 /* Eject the CD-ROM */
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373 static int
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374 SDL_SYS_CDEject(SDL_CD * cdrom)
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375 {
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376 return (SDL_SYS_CDioctl(cdrom->id, MCI_SET, MCI_SET_DOOR_OPEN, NULL));
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377 }
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378
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379 /* Close the CD-ROM handle */
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380 static void
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381 SDL_SYS_CDClose(SDL_CD * cdrom)
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382 {
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383 SDL_SYS_CDioctl(cdrom->id, MCI_CLOSE, MCI_WAIT, NULL);
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384 }
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385
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386 void
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387 SDL_SYS_CDQuit(void)
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388 {
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389 int i;
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390
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391 if (SDL_numcds > 0) {
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392 for (i = 0; i < SDL_numcds; ++i) {
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393 SDL_free(SDL_cdlist[i]);
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394 }
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395 SDL_numcds = 0;
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396 }
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397 }
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398
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399 #endif /* SDL_CDROM_WIN32 */
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400 /* vi: set ts=4 sw=4 expandtab: */