annotate src/cdrom/win32/SDL_syscdrom.c @ 1524:38a12fd1a2c1

Fixed bug #46 Date: Fri, 13 Jan 2006 18:09:45 -0500 From: mhall4400 vipmail kvcc edu Subject: Possible SDL bug Greetings I believe Ive come across a bug in your SDL product (1.2.9), in the CD-ROM control portion of the library. When calling the SDL_CDPlay() function to play the last track of a CD using the offset and length from an SDL_CD structure generated by SDL_CDOpen(), I get the following error from a call to SDL_Error(): mciSendCommand() error: The specified parameter is out of range for the specified command. The code returning the error is: SDL_CDPlay(g_playingDriveSDLCD, g_playingDriveSDLCD->track[trackNumberInt].offset, g_playingDriveSDLCD->track[trackNumberInt].length) Subtracting one from the length of the provided length seems to repair the problem: SDL_CDPlay(g_playingDriveSDLCD, g_playingDriveSDLCD->track[trackNumberInt].offset, (g_playingDriveSDLCD->track[trackNumberInt].length) - 1) Ive replicated this problem on Windows 98 SE (several months since last patch), fully-patched Window ME, seldom-patched Windows XP SP1, and fully-patched Windows XP SP2. While investigating the issue, I came across a line in your librarys win32 source code in file \src\cdrom\win32\SDL_syscdrom.c (source code zip archive from your download page), function: SDL_SYS_CDGetTOC(), line 226 where you add 1 to the value for length to fix MCI last track length bug. This may be the source of the issue (because subtracting 1 from the length seems to resolve the issue). Microsoft may have patched the referenced bug since you wrote that line. Mike Hall
author Sam Lantinga <slouken@libsdl.org>
date Tue, 14 Mar 2006 05:34:39 +0000
parents 84de7511f79f
children 92947e3a18db
rev   line source
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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 /* Functions for system-level CD-ROM audio control */
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25
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26 #define WIN32_LEAN_AND_MEAN
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27 #include <windows.h>
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28 #include <mmsystem.h>
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29
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30 #include "SDL_cdrom.h"
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31 #include "../SDL_syscdrom.h"
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32
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33 /* This really broken?? */
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34 #define BROKEN_MCI_PAUSE /* Pausing actually stops play -- Doh! */
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35
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36 /* The maximum number of CD-ROM drives we'll detect (Don't change!) */
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37 #define MAX_DRIVES 26
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38
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39 /* A list of available CD-ROM drives */
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40 static char *SDL_cdlist[MAX_DRIVES];
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41 static MCIDEVICEID SDL_mciID[MAX_DRIVES];
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42 #ifdef BROKEN_MCI_PAUSE
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43 static int SDL_paused[MAX_DRIVES];
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44 #endif
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45 static int SDL_CD_end_position;
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46
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47 /* The system-dependent CD control functions */
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48 static const char *SDL_SYS_CDName(int drive);
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49 static int SDL_SYS_CDOpen(int drive);
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50 static int SDL_SYS_CDGetTOC(SDL_CD *cdrom);
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51 static CDstatus SDL_SYS_CDStatus(SDL_CD *cdrom, int *position);
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52 static int SDL_SYS_CDPlay(SDL_CD *cdrom, int start, int length);
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53 static int SDL_SYS_CDPause(SDL_CD *cdrom);
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54 static int SDL_SYS_CDResume(SDL_CD *cdrom);
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55 static int SDL_SYS_CDStop(SDL_CD *cdrom);
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56 static int SDL_SYS_CDEject(SDL_CD *cdrom);
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57 static void SDL_SYS_CDClose(SDL_CD *cdrom);
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58
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59
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60 /* Add a CD-ROM drive to our list of valid drives */
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61 static void AddDrive(char *drive)
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62 {
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63 int i;
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64
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65 if ( SDL_numcds < MAX_DRIVES ) {
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66 /* Add this drive to our list */
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67 i = SDL_numcds;
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68 SDL_cdlist[i] = SDL_strdup(drive);
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69 if ( SDL_cdlist[i] == NULL ) {
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70 SDL_OutOfMemory();
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71 return;
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72 }
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73 ++SDL_numcds;
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74 #ifdef CDROM_DEBUG
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75 fprintf(stderr, "Added CD-ROM drive: %s\n", drive);
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76 #endif
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77 }
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78 }
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79
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80 int SDL_SYS_CDInit(void)
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81 {
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82 /* checklist: Drive 'A' - 'Z' */
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83 int i;
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84 char drive[4];
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85
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86 /* Fill in our driver capabilities */
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87 SDL_CDcaps.Name = SDL_SYS_CDName;
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88 SDL_CDcaps.Open = SDL_SYS_CDOpen;
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89 SDL_CDcaps.GetTOC = SDL_SYS_CDGetTOC;
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90 SDL_CDcaps.Status = SDL_SYS_CDStatus;
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91 SDL_CDcaps.Play = SDL_SYS_CDPlay;
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92 SDL_CDcaps.Pause = SDL_SYS_CDPause;
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93 SDL_CDcaps.Resume = SDL_SYS_CDResume;
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94 SDL_CDcaps.Stop = SDL_SYS_CDStop;
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95 SDL_CDcaps.Eject = SDL_SYS_CDEject;
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96 SDL_CDcaps.Close = SDL_SYS_CDClose;
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97
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98 /* Scan the system for CD-ROM drives */
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99 for ( i='A'; i<='Z'; ++i ) {
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100 SDL_snprintf(drive, SDL_arraysize(drive), "%c:\\", i);
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101 if ( GetDriveType(drive) == DRIVE_CDROM ) {
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102 AddDrive(drive);
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103 }
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104 }
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105 SDL_memset(SDL_mciID, 0, sizeof(SDL_mciID));
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106 return(0);
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107 }
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108
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109 /* General ioctl() CD-ROM command function */
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110 static int SDL_SYS_CDioctl(int id, UINT msg, DWORD flags, void *arg)
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111 {
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112 MCIERROR mci_error;
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113
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114 mci_error = mciSendCommand(SDL_mciID[id], msg, flags, (DWORD_PTR)arg);
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115 if ( mci_error ) {
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116 char error[256];
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117
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118 mciGetErrorString(mci_error, error, 256);
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119 SDL_SetError("mciSendCommand() error: %s", error);
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120 }
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121 return(!mci_error ? 0 : -1);
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122 }
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123
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124 static const char *SDL_SYS_CDName(int drive)
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125 {
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126 return(SDL_cdlist[drive]);
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127 }
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128
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129 static int SDL_SYS_CDOpen(int drive)
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130 {
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131 MCI_OPEN_PARMS mci_open;
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132 MCI_SET_PARMS mci_set;
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133 char device[3];
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134 DWORD flags;
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135
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136 /* Open the requested device */
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137 mci_open.lpstrDeviceType = (LPCSTR) MCI_DEVTYPE_CD_AUDIO;
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138 device[0] = *SDL_cdlist[drive];
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139 device[1] = ':';
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140 device[2] = '\0';
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141 mci_open.lpstrElementName = device;
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142 flags =
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143 (MCI_OPEN_TYPE|MCI_OPEN_SHAREABLE|MCI_OPEN_TYPE_ID|MCI_OPEN_ELEMENT);
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144 if ( SDL_SYS_CDioctl(0, MCI_OPEN, flags, &mci_open) < 0 ) {
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145 flags &= ~MCI_OPEN_SHAREABLE;
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146 if ( SDL_SYS_CDioctl(0, MCI_OPEN, flags, &mci_open) < 0 ) {
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147 return(-1);
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148 }
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149 }
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150 SDL_mciID[drive] = mci_open.wDeviceID;
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151
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parents:
diff changeset
152 /* Set the minute-second-frame time format */
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153 mci_set.dwTimeFormat = MCI_FORMAT_MSF;
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154 SDL_SYS_CDioctl(drive, MCI_SET, MCI_SET_TIME_FORMAT, &mci_set);
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155
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diff changeset
156 #ifdef BROKEN_MCI_PAUSE
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157 SDL_paused[drive] = 0;
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diff changeset
158 #endif
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diff changeset
159 return(drive);
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160 }
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diff changeset
161
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162 static int SDL_SYS_CDGetTOC(SDL_CD *cdrom)
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diff changeset
163 {
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164 MCI_STATUS_PARMS mci_status;
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165 int i, okay;
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166 DWORD flags;
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167
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168 okay = 0;
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169 mci_status.dwItem = MCI_STATUS_NUMBER_OF_TRACKS;
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170 flags = MCI_STATUS_ITEM | MCI_WAIT;
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171 if ( SDL_SYS_CDioctl(cdrom->id, MCI_STATUS, flags, &mci_status) == 0 ) {
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172 cdrom->numtracks = mci_status.dwReturn;
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173 if ( cdrom->numtracks > SDL_MAX_TRACKS ) {
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174 cdrom->numtracks = SDL_MAX_TRACKS;
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175 }
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diff changeset
176 /* Read all the track TOC entries */
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177 flags = MCI_STATUS_ITEM | MCI_TRACK | MCI_WAIT;
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178 for ( i=0; i<cdrom->numtracks; ++i ) {
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179 cdrom->track[i].id = i+1;
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180 mci_status.dwTrack = cdrom->track[i].id;
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181 #ifdef MCI_CDA_STATUS_TYPE_TRACK
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182 mci_status.dwItem = MCI_CDA_STATUS_TYPE_TRACK;
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183 if ( SDL_SYS_CDioctl(cdrom->id, MCI_STATUS, flags,
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184 &mci_status) < 0 ) {
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185 break;
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186 }
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187 if ( mci_status.dwReturn == MCI_CDA_TRACK_AUDIO ) {
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188 cdrom->track[i].type = SDL_AUDIO_TRACK;
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189 } else {
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190 cdrom->track[i].type = SDL_DATA_TRACK;
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191 }
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192 #else
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193 cdrom->track[i].type = SDL_AUDIO_TRACK;
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194 #endif
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195 mci_status.dwItem = MCI_STATUS_POSITION;
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196 if ( SDL_SYS_CDioctl(cdrom->id, MCI_STATUS, flags,
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197 &mci_status) < 0 ) {
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198 break;
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199 }
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200 cdrom->track[i].offset = MSF_TO_FRAMES(
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diff changeset
201 MCI_MSF_MINUTE(mci_status.dwReturn),
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202 MCI_MSF_SECOND(mci_status.dwReturn),
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diff changeset
203 MCI_MSF_FRAME(mci_status.dwReturn));
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204 cdrom->track[i].length = 0;
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diff changeset
205 if ( i > 0 ) {
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diff changeset
206 cdrom->track[i-1].length =
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diff changeset
207 cdrom->track[i].offset-
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diff changeset
208 cdrom->track[i-1].offset;
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parents:
diff changeset
209 }
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diff changeset
210 }
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diff changeset
211 if ( i == cdrom->numtracks ) {
201
ddee60057806 Fixed last track time calculation (thanks Tchi Southivong)
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parents: 192
diff changeset
212 mci_status.dwTrack = cdrom->track[i - 1].id;
0
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diff changeset
213 mci_status.dwItem = MCI_STATUS_LENGTH;
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diff changeset
214 if ( SDL_SYS_CDioctl(cdrom->id, MCI_STATUS, flags,
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diff changeset
215 &mci_status) == 0 ) {
201
ddee60057806 Fixed last track time calculation (thanks Tchi Southivong)
Sam Lantinga <slouken@libsdl.org>
parents: 192
diff changeset
216 cdrom->track[i - 1].length = MSF_TO_FRAMES(
0
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diff changeset
217 MCI_MSF_MINUTE(mci_status.dwReturn),
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diff changeset
218 MCI_MSF_SECOND(mci_status.dwReturn),
1524
38a12fd1a2c1 Fixed bug #46
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parents: 1456
diff changeset
219 MCI_MSF_FRAME(mci_status.dwReturn));
201
ddee60057806 Fixed last track time calculation (thanks Tchi Southivong)
Sam Lantinga <slouken@libsdl.org>
parents: 192
diff changeset
220 /* compute lead-out offset */
ddee60057806 Fixed last track time calculation (thanks Tchi Southivong)
Sam Lantinga <slouken@libsdl.org>
parents: 192
diff changeset
221 cdrom->track[i].offset = cdrom->track[i - 1].offset +
ddee60057806 Fixed last track time calculation (thanks Tchi Southivong)
Sam Lantinga <slouken@libsdl.org>
parents: 192
diff changeset
222 cdrom->track[i - 1].length;
0
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diff changeset
223 cdrom->track[i].length = 0;
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diff changeset
224 okay = 1;
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parents:
diff changeset
225 }
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parents:
diff changeset
226 }
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parents:
diff changeset
227 }
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diff changeset
228 return(okay ? 0 : -1);
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diff changeset
229 }
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diff changeset
230
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diff changeset
231 /* Get CD-ROM status */
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diff changeset
232 static CDstatus SDL_SYS_CDStatus(SDL_CD *cdrom, int *position)
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diff changeset
233 {
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diff changeset
234 CDstatus status;
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diff changeset
235 MCI_STATUS_PARMS mci_status;
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diff changeset
236 DWORD flags;
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parents:
diff changeset
237
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diff changeset
238 flags = MCI_STATUS_ITEM | MCI_WAIT;
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diff changeset
239 mci_status.dwItem = MCI_STATUS_MODE;
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diff changeset
240 if ( SDL_SYS_CDioctl(cdrom->id, MCI_STATUS, flags, &mci_status) < 0 ) {
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diff changeset
241 status = CD_ERROR;
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diff changeset
242 } else {
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parents:
diff changeset
243 switch (mci_status.dwReturn) {
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parents:
diff changeset
244 case MCI_MODE_NOT_READY:
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parents:
diff changeset
245 case MCI_MODE_OPEN:
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parents:
diff changeset
246 status = CD_TRAYEMPTY;
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parents:
diff changeset
247 break;
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parents:
diff changeset
248 case MCI_MODE_STOP:
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parents:
diff changeset
249 #ifdef BROKEN_MCI_PAUSE
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diff changeset
250 if ( SDL_paused[cdrom->id] ) {
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parents:
diff changeset
251 status = CD_PAUSED;
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parents:
diff changeset
252 } else {
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diff changeset
253 status = CD_STOPPED;
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parents:
diff changeset
254 }
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parents:
diff changeset
255 #else
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parents:
diff changeset
256 status = CD_STOPPED;
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parents:
diff changeset
257 #endif /* BROKEN_MCI_PAUSE */
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parents:
diff changeset
258 break;
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parents:
diff changeset
259 case MCI_MODE_PLAY:
192
e31f8d815aaa Fixed resuming a paused CD on Win2K (thanks Aragorn)
Sam Lantinga <slouken@libsdl.org>
parents: 0
diff changeset
260 #ifdef BROKEN_MCI_PAUSE
e31f8d815aaa Fixed resuming a paused CD on Win2K (thanks Aragorn)
Sam Lantinga <slouken@libsdl.org>
parents: 0
diff changeset
261 if ( SDL_paused[cdrom->id] ) {
e31f8d815aaa Fixed resuming a paused CD on Win2K (thanks Aragorn)
Sam Lantinga <slouken@libsdl.org>
parents: 0
diff changeset
262 status = CD_PAUSED;
e31f8d815aaa Fixed resuming a paused CD on Win2K (thanks Aragorn)
Sam Lantinga <slouken@libsdl.org>
parents: 0
diff changeset
263 } else {
e31f8d815aaa Fixed resuming a paused CD on Win2K (thanks Aragorn)
Sam Lantinga <slouken@libsdl.org>
parents: 0
diff changeset
264 status = CD_PLAYING;
e31f8d815aaa Fixed resuming a paused CD on Win2K (thanks Aragorn)
Sam Lantinga <slouken@libsdl.org>
parents: 0
diff changeset
265 }
e31f8d815aaa Fixed resuming a paused CD on Win2K (thanks Aragorn)
Sam Lantinga <slouken@libsdl.org>
parents: 0
diff changeset
266 #else
0
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parents:
diff changeset
267 status = CD_PLAYING;
192
e31f8d815aaa Fixed resuming a paused CD on Win2K (thanks Aragorn)
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parents: 0
diff changeset
268 #endif /* BROKEN_MCI_PAUSE */
0
74212992fb08 Initial revision
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parents:
diff changeset
269 break;
74212992fb08 Initial revision
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parents:
diff changeset
270 case MCI_MODE_PAUSE:
74212992fb08 Initial revision
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parents:
diff changeset
271 status = CD_PAUSED;
74212992fb08 Initial revision
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parents:
diff changeset
272 break;
74212992fb08 Initial revision
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parents:
diff changeset
273 default:
74212992fb08 Initial revision
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parents:
diff changeset
274 status = CD_ERROR;
74212992fb08 Initial revision
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parents:
diff changeset
275 break;
74212992fb08 Initial revision
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parents:
diff changeset
276 }
74212992fb08 Initial revision
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parents:
diff changeset
277 }
74212992fb08 Initial revision
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parents:
diff changeset
278 if ( position ) {
74212992fb08 Initial revision
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parents:
diff changeset
279 if ( status == CD_PLAYING || (status == CD_PAUSED) ) {
74212992fb08 Initial revision
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parents:
diff changeset
280 mci_status.dwItem = MCI_STATUS_POSITION;
74212992fb08 Initial revision
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parents:
diff changeset
281 if ( SDL_SYS_CDioctl(cdrom->id, MCI_STATUS, flags,
74212992fb08 Initial revision
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parents:
diff changeset
282 &mci_status) == 0 ) {
74212992fb08 Initial revision
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parents:
diff changeset
283 *position = MSF_TO_FRAMES(
74212992fb08 Initial revision
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parents:
diff changeset
284 MCI_MSF_MINUTE(mci_status.dwReturn),
74212992fb08 Initial revision
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parents:
diff changeset
285 MCI_MSF_SECOND(mci_status.dwReturn),
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
286 MCI_MSF_FRAME(mci_status.dwReturn));
74212992fb08 Initial revision
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parents:
diff changeset
287 } else {
74212992fb08 Initial revision
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parents:
diff changeset
288 *position = 0;
74212992fb08 Initial revision
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parents:
diff changeset
289 }
74212992fb08 Initial revision
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parents:
diff changeset
290 } else {
74212992fb08 Initial revision
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parents:
diff changeset
291 *position = 0;
74212992fb08 Initial revision
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parents:
diff changeset
292 }
74212992fb08 Initial revision
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parents:
diff changeset
293 }
74212992fb08 Initial revision
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parents:
diff changeset
294 return(status);
74212992fb08 Initial revision
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parents:
diff changeset
295 }
74212992fb08 Initial revision
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parents:
diff changeset
296
74212992fb08 Initial revision
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parents:
diff changeset
297 /* Start play */
74212992fb08 Initial revision
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parents:
diff changeset
298 static int SDL_SYS_CDPlay(SDL_CD *cdrom, int start, int length)
74212992fb08 Initial revision
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parents:
diff changeset
299 {
74212992fb08 Initial revision
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parents:
diff changeset
300 MCI_PLAY_PARMS mci_play;
74212992fb08 Initial revision
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parents:
diff changeset
301 int m, s, f;
74212992fb08 Initial revision
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parents:
diff changeset
302 DWORD flags;
74212992fb08 Initial revision
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parents:
diff changeset
303
74212992fb08 Initial revision
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parents:
diff changeset
304 flags = MCI_FROM | MCI_TO | MCI_NOTIFY;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
305 mci_play.dwCallback = 0;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
306 FRAMES_TO_MSF(start, &m, &s, &f);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
307 mci_play.dwFrom = MCI_MAKE_MSF(m, s, f);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
308 FRAMES_TO_MSF(start+length, &m, &s, &f);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
309 mci_play.dwTo = MCI_MAKE_MSF(m, s, f);
904
34af7946130a Date: Fri, 16 Jul 2004 17:25:45 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 769
diff changeset
310 SDL_CD_end_position = mci_play.dwTo;
0
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311 return(SDL_SYS_CDioctl(cdrom->id, MCI_PLAY, flags, &mci_play));
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312 }
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313
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314 /* Pause play */
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315 static int SDL_SYS_CDPause(SDL_CD *cdrom)
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316 {
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317 #ifdef BROKEN_MCI_PAUSE
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318 SDL_paused[cdrom->id] = 1;
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319 #endif
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320 return(SDL_SYS_CDioctl(cdrom->id, MCI_PAUSE, MCI_WAIT, NULL));
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321 }
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322
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323 /* Resume play */
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324 static int SDL_SYS_CDResume(SDL_CD *cdrom)
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325 {
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326 #ifdef BROKEN_MCI_PAUSE
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327 MCI_STATUS_PARMS mci_status;
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328 int okay;
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329 int flags;
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330
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331 okay = 0;
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332 /* Play from the current play position to the end position set earlier */
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333 flags = MCI_STATUS_ITEM | MCI_WAIT;
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334 mci_status.dwItem = MCI_STATUS_POSITION;
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335 if ( SDL_SYS_CDioctl(cdrom->id, MCI_STATUS, flags, &mci_status) == 0 ) {
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336 MCI_PLAY_PARMS mci_play;
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337
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338 flags = MCI_FROM | MCI_TO | MCI_NOTIFY;
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339 mci_play.dwCallback = 0;
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340 mci_play.dwFrom = mci_status.dwReturn;
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341 mci_play.dwTo = SDL_CD_end_position;
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342 if (SDL_SYS_CDioctl(cdrom->id,MCI_PLAY,flags,&mci_play) == 0) {
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343 okay = 1;
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344 SDL_paused[cdrom->id] = 0;
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345 }
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346 }
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347 return(okay ? 0 : -1);
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348 #else
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349 return(SDL_SYS_CDioctl(cdrom->id, MCI_RESUME, MCI_WAIT, NULL));
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350 #endif /* BROKEN_MCI_PAUSE */
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351 }
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352
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353 /* Stop play */
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354 static int SDL_SYS_CDStop(SDL_CD *cdrom)
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355 {
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356 return(SDL_SYS_CDioctl(cdrom->id, MCI_STOP, MCI_WAIT, NULL));
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357 }
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358
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359 /* Eject the CD-ROM */
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360 static int SDL_SYS_CDEject(SDL_CD *cdrom)
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361 {
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362 return(SDL_SYS_CDioctl(cdrom->id, MCI_SET, MCI_SET_DOOR_OPEN, NULL));
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363 }
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364
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365 /* Close the CD-ROM handle */
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366 static void SDL_SYS_CDClose(SDL_CD *cdrom)
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367 {
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368 SDL_SYS_CDioctl(cdrom->id, MCI_CLOSE, MCI_WAIT, NULL);
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369 }
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370
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371 void SDL_SYS_CDQuit(void)
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372 {
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373 int i;
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374
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375 if ( SDL_numcds > 0 ) {
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376 for ( i=0; i<SDL_numcds; ++i ) {
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377 SDL_free(SDL_cdlist[i]);
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378 }
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379 SDL_numcds = 0;
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380 }
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381 }