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view src/cdrom/macos/SDL_syscdrom.c @ 4167:a6f635e5eaa6 SDL-1.2

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Fixed bug #611 From Tim Angus 2008-08-12 11:18:06 I'm one of the maintainers of ioquake3.org, an updated version of the Quake 3 engine. Relatively recently, we moved ioq3 to use SDL as a replacement for 95% of the platform specific code that was there. On the whole it's doing a great job but unfortunately since the move we've been getting complaints about the quality of the mouse input on the Windows platform to the point where for many the game is unplayable. Put in other terms, the current stable SDL 1.2 is basically not fit for purpose if you need high quality mouse input as you do in a first person shooter. Over the weekend I decided to pull my finger out and actually figure out what's going on. There are basically two major problems. Firstly, when using the "windib" driver, mouse input is gathered via the WM_MOUSEMOVE message. Googling for this indicates that often this is known to result in "spurious" and/or "missing" mouse movement events; this is the primary cause of the poor mouse input. The second problem is that the "directx" driver does not work at all in combination with OpenGL meaning that you can't use DirectInput if your application also uses OpenGL. In other words you're locked into using the "windib" driver and its poor mouse input. In order to address these problems I've done the following: * Remove WM_MOUSEMOVE based motion event generation and replace with calls to GetCursorPos which seems much more reliable. In order to achieve this I've moved mouse motion out into a separate function that is called once per DIB_PumpEvents. * Remove the restriction on the "directx" driver being inoperable in combination with OpenGL. There is a bug for this issues that I've hijacked to a certain extent (http://bugzilla.libsdl.org/show_bug.cgi?id=265). I'm the first to admit I don't really understand why this restriction is there in the first place. The commit message for the bug fix that introduced this restriction (r581) isn't very elaborate and I couldn't see any other bug tracking the issue. If anyone has more information on the bug that was avoided by r581 it would be helpful as I/someone could then look into addressing the problem without disabling the "directx" driver. * I've also removed the restriction on not being allowed to use DirectInput in windowed mode. I couldn't see any reason for this, at least not from our perspective. I have my suspicions that it'll be something like matching up the cursor with the mouse coordinates... * I bumped up the DirectInput API used to version 7 in order to get access to mouse buttons 4-7. I've had to inject a little bit of the DX7 headers into SDL there as the MinGW ones aren't up to date in this respect.
author Sam Lantinga <slouken@libsdl.org>
date Thu, 02 Apr 2009 04:43:36 +0000
parents a1b03ba2fcd0
children
line wrap: on
line source

/*
    SDL - Simple DirectMedia Layer
    Copyright (C) 1997-2009 Sam Lantinga

    This library is free software; you can redistribute it and/or
    modify it under the terms of the GNU Lesser General Public
    License as published by the Free Software Foundation; either
    version 2.1 of the License, or (at your option) any later version.

    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
    Lesser General Public License for more details.

    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

    Sam Lantinga
    slouken@libsdl.org
*/
#include "SDL_config.h"

#ifdef SDL_CDROM_MACOS

/* 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"
#include "../SDL_syscdrom.h"
#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 */
	SDL_memset(&cdpb, 0, sizeof(cdpb));
	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 */
	SDL_memset(&cdpb, 0, sizeof(cdpb));
	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 */
	SDL_memset(tracks, 0, sizeof(tracks));
	SDL_memset(&cdpb, 0, sizeof(cdpb));
	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);
	}
	SDL_memset(&cdpb, 0, sizeof(cdpb));
	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 */
		SDL_memset(&cdpb, 0, sizeof(cdpb));
		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 */
	SDL_memset(&cdpb, 0, sizeof(cdpb));
	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 */
	SDL_memset(&cdpb, 0, sizeof(cdpb));
	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 */
	SDL_memset(&cdpb, 0, sizeof(cdpb));
	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);
	SDL_memset(&cdpb, 0, sizeof(cdpb));
	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);
	SDL_memset(&cdpb, 0, sizeof(cdpb));
	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;

	SDL_memset(&cdpb, 0, sizeof(cdpb));
	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;

	SDL_memset(&cdpb, 0, sizeof(cdpb));
	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;

	SDL_memset(&cdpb, 0, sizeof(cdpb));
	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 */
		SDL_memset(&hpb, 0, sizeof(hpb));
		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) {
		SDL_memset(&cpb, 0, sizeof(cpb));
		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--) 
		SDL_memset(SDL_cdlist + SDL_numcds, 0, sizeof(SDL_cdlist[0]));
}

#endif /* SDL_CDROM_MACOS */