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SDL_syscdrom.c
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/*
SDL - Simple DirectMedia Layer
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Copyright (C) 1997-2006 Sam Lantinga
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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Sam Lantinga
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slouken@libsdl.org
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*/
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#include "SDL_config.h"
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#ifdef SDL_CDROM_MACOS
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/* MacOS functions for system-level CD-ROM audio control */
#include <Devices.h>
#include <Files.h>
#include <LowMem.h> /* Use entry table macros, not functions in InterfaceLib */
#include "SDL_cdrom.h"
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#include "../SDL_syscdrom.h"
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#include "SDL_syscdrom_c.h"
/* Added by Matt Slot */
#if !defined(LMGetUnitTableEntryCount)
#define LMGetUnitTableEntryCount() *(short *)0x01D2
#endif
/* The maximum number of CD-ROM drives we'll detect */
#define MAX_DRIVES 26
/* A list of available CD-ROM drives */
static long SDL_cdversion = 0;
static struct {
short dRefNum;
short driveNum;
long frames;
char name[256];
Boolean hasAudio;
} SDL_cdlist[MAX_DRIVES];
static StringPtr gDriverName = "\p.AppleCD";
/* The system-dependent CD control functions */
static const char *SDL_SYS_CDName(int drive);
static int SDL_SYS_CDOpen(int drive);
static int SDL_SYS_CDGetTOC(SDL_CD *cdrom);
static CDstatus SDL_SYS_CDStatus(SDL_CD *cdrom, int *position);
static int SDL_SYS_CDPlay(SDL_CD *cdrom, int start, int length);
static int SDL_SYS_CDPause(SDL_CD *cdrom);
static int SDL_SYS_CDResume(SDL_CD *cdrom);
static int SDL_SYS_CDStop(SDL_CD *cdrom);
static int SDL_SYS_CDEject(SDL_CD *cdrom);
static void SDL_SYS_CDClose(SDL_CD *cdrom);
static short SDL_SYS_ShortToBCD(short value)
{
return((value % 10) + (value / 10) * 0x10); /* Convert value to BCD */
}
static short SDL_SYS_BCDToShort(short value)
{
return((value % 0x10) + (value / 0x10) * 10); /* Convert value from BCD */
}
int SDL_SYS_CDInit(void)
{
SInt16 dRefNum = 0;
SInt16 first, last;
SDL_numcds = 0;
/* Check that the software is available */
if (Gestalt(kGestaltAudioCDSelector, &SDL_cdversion) ||
!SDL_cdversion) return(0);
/* Fill in our driver capabilities */
SDL_CDcaps.Name = SDL_SYS_CDName;
SDL_CDcaps.Open = SDL_SYS_CDOpen;
SDL_CDcaps.GetTOC = SDL_SYS_CDGetTOC;
SDL_CDcaps.Status = SDL_SYS_CDStatus;
SDL_CDcaps.Play = SDL_SYS_CDPlay;
SDL_CDcaps.Pause = SDL_SYS_CDPause;
SDL_CDcaps.Resume = SDL_SYS_CDResume;
SDL_CDcaps.Stop = SDL_SYS_CDStop;
SDL_CDcaps.Eject = SDL_SYS_CDEject;
SDL_CDcaps.Close = SDL_SYS_CDClose;
/* Walk the list, count each AudioCD driver, and save the refnums */
first = -1;
last = 0 - LMGetUnitTableEntryCount();
for(dRefNum = first; dRefNum >= last; dRefNum--) {
Str255 driverName;
StringPtr namePtr;
DCtlHandle deviceEntry;
deviceEntry = GetDCtlEntry(dRefNum);
if (! deviceEntry) continue;
/* Is this an .AppleCD ? */
namePtr = (*deviceEntry)->dCtlFlags & (1L << dRAMBased) ?
((StringPtr) ((DCtlPtr) deviceEntry)->dCtlDriver + 18) :
((StringPtr) (*deviceEntry)->dCtlDriver + 18);
BlockMoveData(namePtr, driverName, namePtr[0]+1);
if (driverName[0] > gDriverName[0]) driverName[0] = gDriverName[0];
if (! EqualString(driverName, gDriverName, false, false)) continue;
/* Record the basic info for each drive */
SDL_cdlist[SDL_numcds].dRefNum = dRefNum;
BlockMoveData(namePtr + 1, SDL_cdlist[SDL_numcds].name, namePtr[0]);
SDL_cdlist[SDL_numcds].name[namePtr[0]] = 0;
SDL_cdlist[SDL_numcds].hasAudio = false;
SDL_numcds++;
}
return(0);
}
static const char *SDL_SYS_CDName(int drive)
{
return(SDL_cdlist[drive].name);
}
static int get_drivenum(int drive)
{
QHdr *driveQ = GetDrvQHdr();
DrvQEl *driveElem;
/* Update the drive number */
SDL_cdlist[drive].driveNum = 0;
if ( driveQ->qTail ) {
driveQ->qTail->qLink = 0;
}
for ( driveElem=(DrvQEl *)driveQ->qHead; driveElem;
driveElem = (DrvQEl *)driveElem->qLink ) {
if ( driveElem->dQRefNum == SDL_cdlist[drive].dRefNum ) {
SDL_cdlist[drive].driveNum = driveElem->dQDrive;
break;
}
}
return(SDL_cdlist[drive].driveNum);
}
static int SDL_SYS_CDOpen(int drive)
{
return(drive);
}
static int SDL_SYS_CDGetTOC(SDL_CD *cdrom)
{
CDCntrlParam cdpb;
CDTrackData tracks[SDL_MAX_TRACKS];
long i, leadout;
/* Get the number of tracks on the CD by examining the TOC */
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SDL_memset(&cdpb, 0, sizeof(cdpb));
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cdpb.ioVRefNum = SDL_cdlist[cdrom->id].driveNum;
cdpb.ioCRefNum = SDL_cdlist[cdrom->id].dRefNum;
cdpb.csCode = kReadTOC;
cdpb.csParam.words[0] = kGetTrackRange;
if ( PBControlSync((ParmBlkPtr)&cdpb) != noErr ) {
SDL_SetError("PBControlSync() failed");
return(-1);
}
cdrom->numtracks =
SDL_SYS_BCDToShort(cdpb.csParam.bytes[1]) -
SDL_SYS_BCDToShort(cdpb.csParam.bytes[0]) + 1;
if ( cdrom->numtracks > SDL_MAX_TRACKS )
cdrom->numtracks = SDL_MAX_TRACKS;
cdrom->status = CD_STOPPED;
cdrom->cur_track = 0; /* Apparently these are set elsewhere */
cdrom->cur_frame = 0; /* Apparently these are set elsewhere */
/* Get the lead out area of the CD by examining the TOC */
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SDL_memset(&cdpb, 0, sizeof(cdpb));
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cdpb.ioVRefNum = SDL_cdlist[cdrom->id].driveNum;
cdpb.ioCRefNum = SDL_cdlist[cdrom->id].dRefNum;
cdpb.csCode = kReadTOC;
cdpb.csParam.words[0] = kGetLeadOutArea;
if ( PBControlSync((ParmBlkPtr)&cdpb) != noErr ) {
SDL_SetError("PBControlSync() failed");
return(-1);
}
leadout = MSF_TO_FRAMES(
SDL_SYS_BCDToShort(cdpb.csParam.bytes[0]),
SDL_SYS_BCDToShort(cdpb.csParam.bytes[1]),
SDL_SYS_BCDToShort(cdpb.csParam.bytes[2]));
/* Get an array of track locations by examining the TOC */
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SDL_memset(tracks, 0, sizeof(tracks));
SDL_memset(&cdpb, 0, sizeof(cdpb));
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cdpb.ioVRefNum = SDL_cdlist[cdrom->id].driveNum;
cdpb.ioCRefNum = SDL_cdlist[cdrom->id].dRefNum;
cdpb.csCode = kReadTOC;
cdpb.csParam.words[0] = kGetTrackEntries; /* Type of Query */
* ((long *) (cdpb.csParam.words+1)) = (long) tracks;
cdpb.csParam.words[3] = cdrom->numtracks * sizeof(tracks[0]);
* ((char *) (cdpb.csParam.words+4)) = 1; /* First track */
if ( PBControlSync((ParmBlkPtr)&cdpb) != noErr ) {
SDL_SetError("PBControlSync() failed");
return(-1);
}
/* Read all the track TOC entries */
SDL_cdlist[cdrom->id].hasAudio = false;
for ( i=0; i<cdrom->numtracks; ++i )
{
cdrom->track[i].id = i+1;
if (tracks[i].entry.control & kDataTrackMask)
cdrom->track[i].type = SDL_DATA_TRACK;
else
{
cdrom->track[i].type = SDL_AUDIO_TRACK;
SDL_cdlist[SDL_numcds].hasAudio = true;
}
cdrom->track[i].offset = MSF_TO_FRAMES(
SDL_SYS_BCDToShort(tracks[i].entry.min),
SDL_SYS_BCDToShort(tracks[i].entry.min),
SDL_SYS_BCDToShort(tracks[i].entry.frame));
cdrom->track[i].length = MSF_TO_FRAMES(
SDL_SYS_BCDToShort(tracks[i+1].entry.min),
SDL_SYS_BCDToShort(tracks[i+1].entry.min),
SDL_SYS_BCDToShort(tracks[i+1].entry.frame)) -
cdrom->track[i].offset;
}
/* Apparently SDL wants a fake last entry */
cdrom->track[i].offset = leadout;
cdrom->track[i].length = 0;
return(0);
}
/* Get CD-ROM status */
static CDstatus SDL_SYS_CDStatus(SDL_CD *cdrom, int *position)
{
CDCntrlParam cdpb;
CDstatus status = CD_ERROR;
Boolean spinning = false;
if (position) *position = 0;
/* Get the number of tracks on the CD by examining the TOC */
if ( ! get_drivenum(cdrom->id) ) {
return(CD_TRAYEMPTY);
}
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SDL_memset(&cdpb, 0, sizeof(cdpb));
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cdpb.ioVRefNum = SDL_cdlist[cdrom->id].driveNum;
cdpb.ioCRefNum = SDL_cdlist[cdrom->id].dRefNum;
cdpb.csCode = kReadTOC;
cdpb.csParam.words[0] = kGetTrackRange;
if ( PBControlSync((ParmBlkPtr)&cdpb) != noErr ) {
SDL_SetError("PBControlSync() failed");
return(CD_ERROR);
}
cdrom->numtracks =
SDL_SYS_BCDToShort(cdpb.csParam.bytes[1]) -
SDL_SYS_BCDToShort(cdpb.csParam.bytes[0]) + 1;
if ( cdrom->numtracks > SDL_MAX_TRACKS )
cdrom->numtracks = SDL_MAX_TRACKS;
cdrom->cur_track = 0; /* Apparently these are set elsewhere */
cdrom->cur_frame = 0; /* Apparently these are set elsewhere */
if (1 || SDL_cdlist[cdrom->id].hasAudio) {
/* Get the current playback status */
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SDL_memset(&cdpb, 0, sizeof(cdpb));
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cdpb.ioVRefNum = SDL_cdlist[cdrom->id].driveNum;
cdpb.ioCRefNum = SDL_cdlist[cdrom->id].dRefNum;
cdpb.csCode = kAudioStatus;
if ( PBControlSync((ParmBlkPtr)&cdpb) != noErr ) {
SDL_SetError("PBControlSync() failed");
return(-1);
}
switch(cdpb.csParam.cd.status) {
case kStatusPlaying:
status = CD_PLAYING;
spinning = true;
break;
case kStatusPaused:
status = CD_PAUSED;
spinning = true;
break;
case kStatusMuted:
status = CD_PLAYING; /* What should I do here? */
spinning = true;
break;
case kStatusDone:
status = CD_STOPPED;
spinning = true;
break;
case kStatusStopped:
status = CD_STOPPED;
spinning = false;
break;
case kStatusError:
default:
status = CD_ERROR;
spinning = false;
break;
}
if (spinning && position) *position = MSF_TO_FRAMES(
SDL_SYS_BCDToShort(cdpb.csParam.cd.minute),
SDL_SYS_BCDToShort(cdpb.csParam.cd.second),
SDL_SYS_BCDToShort(cdpb.csParam.cd.frame));
}
else
status = CD_ERROR; /* What should I do here? */
return(status);
}
/* Start play */
static int SDL_SYS_CDPlay(SDL_CD *cdrom, int start, int length)
{
CDCntrlParam cdpb;
/* Pause the current audio playback to avoid audible artifacts */
if ( SDL_SYS_CDPause(cdrom) < 0 ) {
return(-1);
}
/* Specify the AudioCD playback mode */
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SDL_memset(&cdpb, 0, sizeof(cdpb));
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cdpb.ioVRefNum = SDL_cdlist[cdrom->id].driveNum;
cdpb.ioCRefNum = SDL_cdlist[cdrom->id].dRefNum;
cdpb.csCode = kSetPlayMode;
cdpb.csParam.bytes[0] = false; /* Repeat? */
cdpb.csParam.bytes[1] = kPlayModeSequential; /* Play mode */
/* ¥¥¥ÊTreat as soft error, NEC Drive doesnt support this call ¥¥¥ */
PBControlSync((ParmBlkPtr) &cdpb);
#if 1
/* Specify the end of audio playback */
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SDL_memset(&cdpb, 0, sizeof(cdpb));
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cdpb.ioVRefNum = SDL_cdlist[cdrom->id].driveNum;
cdpb.ioCRefNum = SDL_cdlist[cdrom->id].dRefNum;
cdpb.csCode = kAudioStop;
cdpb.csParam.words[0] = kBlockPosition; /* Position Mode */
*(long *) (cdpb.csParam.words + 1) = start+length-1; /* Search Address */
if ( PBControlSync((ParmBlkPtr)&cdpb) != noErr ) {
SDL_SetError("PBControlSync() failed");
return(-1);
}
/* Specify the start of audio playback, and start it */
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SDL_memset(&cdpb, 0, sizeof(cdpb));
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cdpb.ioVRefNum = SDL_cdlist[cdrom->id].driveNum;
cdpb.ioCRefNum = SDL_cdlist[cdrom->id].dRefNum;
cdpb.csCode = kAudioPlay;
cdpb.csParam.words[0] = kBlockPosition; /* Position Mode */
*(long *) (cdpb.csParam.words + 1) = start+1; /* Search Address */
cdpb.csParam.words[3] = false; /* Stop address? */
cdpb.csParam.words[4] = kStereoPlayMode; /* Audio Play Mode */
if ( PBControlSync((ParmBlkPtr)&cdpb) != noErr ) {
SDL_SetError("PBControlSync() failed");
return(-1);
}
#else
/* Specify the end of audio playback */
FRAMES_TO_MSF(start+length, &m, &s, &f);
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SDL_memset(&cdpb, 0, sizeof(cdpb));
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cdpb.ioVRefNum = SDL_cdlist[cdrom->id].driveNum;
cdpb.ioCRefNum = SDL_cdlist[cdrom->id].dRefNum;
cdpb.csCode = kAudioStop;
cdpb.csParam.words[0] = kTrackPosition; /* Position Mode */
cdpb.csParam.words[1] = 0; /* Search Address (hiword)*/
cdpb.csParam.words[2] = /* Search Address (loword)*/
SDL_SYS_ShortToBCD(cdrom->numtracks);
if ( PBControlSync((ParmBlkPtr)&cdpb) != noErr ) {
SDL_SetError("PBControlSync() failed");
return(-1);
}
/* Specify the start of audio playback, and start it */
FRAMES_TO_MSF(start, &m, &s, &f);
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SDL_memset(&cdpb, 0, sizeof(cdpb));
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cdpb.ioVRefNum = SDL_cdlist[cdrom->id].driveNum;
cdpb.ioCRefNum = SDL_cdlist[cdrom->id].dRefNum;
cdpb.csCode = kAudioPlay;
cdpb.csParam.words[0] = kTrackPosition; /* Position Mode */
cdpb.csParam.words[1] = 0; /* Search Address (hiword)*/
cdpb.csParam.words[2] = SDL_SYS_ShortToBCD(1); /* Search Address (loword)*/
cdpb.csParam.words[3] = false; /* Stop address? */
cdpb.csParam.words[4] = kStereoPlayMode; /* Audio Play Mode */
if ( PBControlSync((ParmBlkPtr)&cdpb) != noErr ) {
SDL_SetError("PBControlSync() failed");
return(-1);
}
#endif
return(0);
}
/* Pause play */
static int SDL_SYS_CDPause(SDL_CD *cdrom)
{
CDCntrlParam cdpb;
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SDL_memset(&cdpb, 0, sizeof(cdpb));
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cdpb.ioVRefNum = SDL_cdlist[cdrom->id].driveNum;
cdpb.ioCRefNum = SDL_cdlist[cdrom->id].dRefNum;
cdpb.csCode = kAudioPause;
cdpb.csParam.words[0] = 0; /* Pause/Continue Flag (hiword) */
cdpb.csParam.words[1] = 1; /* Pause/Continue Flag (loword) */
if ( PBControlSync((ParmBlkPtr)&cdpb) != noErr ) {
SDL_SetError("PBControlSync() failed");
return(-1);
}
return(0);
}
/* Resume play */
static int SDL_SYS_CDResume(SDL_CD *cdrom)
{
CDCntrlParam cdpb;
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SDL_memset(&cdpb, 0, sizeof(cdpb));
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cdpb.ioVRefNum = SDL_cdlist[cdrom->id].driveNum;
cdpb.ioCRefNum = SDL_cdlist[cdrom->id].dRefNum;
cdpb.csCode = kAudioPause;
cdpb.csParam.words[0] = 0; /* Pause/Continue Flag (hiword) */
cdpb.csParam.words[1] = 0; /* Pause/Continue Flag (loword) */
if ( PBControlSync((ParmBlkPtr)&cdpb) != noErr ) {
SDL_SetError("PBControlSync() failed");
return(-1);
}
return(0);
}
/* Stop play */
static int SDL_SYS_CDStop(SDL_CD *cdrom)
{
CDCntrlParam cdpb;
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SDL_memset(&cdpb, 0, sizeof(cdpb));
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cdpb.ioVRefNum = SDL_cdlist[cdrom->id].driveNum;
cdpb.ioCRefNum = SDL_cdlist[cdrom->id].dRefNum;
cdpb.csCode = kAudioStop;
cdpb.csParam.words[0] = 0; /* Position Mode */
cdpb.csParam.words[1] = 0; /* Search Address (hiword) */
cdpb.csParam.words[2] = 0; /* Search Address (loword) */
if ( PBControlSync((ParmBlkPtr)&cdpb) != noErr ) {
SDL_SetError("PBControlSync() failed");
return(-1);
}
return(0);
}
/* Eject the CD-ROM */
static int SDL_SYS_CDEject(SDL_CD *cdrom)
{
Boolean disk = false;
QHdr *driveQ = GetDrvQHdr();
DrvQEl *driveElem;
HParamBlockRec hpb;
ParamBlockRec cpb;
for ( driveElem = (DrvQEl *) driveQ->qHead; driveElem; driveElem =
(driveElem) ? ((DrvQEl *) driveElem->qLink) :
((DrvQEl *) driveQ->qHead) ) {
if ( driveQ->qTail ) {
driveQ->qTail->qLink = 0;
}
if ( driveElem->dQRefNum != SDL_cdlist[cdrom->id].dRefNum ) {
continue;
}
/* Does drive contain mounted volume? If not, skip */
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SDL_memset(&hpb, 0, sizeof(hpb));
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hpb.volumeParam.ioVRefNum = driveElem->dQDrive;
if ( PBHGetVInfoSync(&hpb) != noErr ) {
continue;
}
if ( (UnmountVol(0, driveElem->dQDrive) == noErr) &&
(Eject(0, driveElem->dQDrive) == noErr) ) {
driveElem = 0; /* Clear pointer to reset our loop */
disk = true;
}
}
/* If no disk is present, just eject the tray */
if (! disk) {
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SDL_memset(&cpb, 0, sizeof(cpb));
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cpb.cntrlParam.ioVRefNum = 0; /* No Drive */
cpb.cntrlParam.ioCRefNum = SDL_cdlist[cdrom->id].dRefNum;
cpb.cntrlParam.csCode = kEjectTheDisc;
if ( PBControlSync((ParmBlkPtr)&cpb) != noErr ) {
SDL_SetError("PBControlSync() failed");
return(-1);
}
}
return(0);
}
/* Close the CD-ROM handle */
static void SDL_SYS_CDClose(SDL_CD *cdrom)
{
return;
}
void SDL_SYS_CDQuit(void)
{
while(SDL_numcds--)
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SDL_memset(SDL_cdlist + SDL_numcds, 0, sizeof(SDL_cdlist[0]));
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}
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#endif /* SDL_CDROM_MACOS */