/*

    SDL - Simple DirectMedia Layer

    Copyright (C) 1997-2006 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_OS2

/* Functions for system-level CD-ROM audio control */

#define INCL_MCIOS2

#include <os2.h>

#include <os2me.h>

#include "SDL_cdrom.h"

#include "../SDL_syscdrom.h"

/* Size of MCI result buffer (in bytes) */

#define MCI_CMDRETBUFSIZE	128

/* The maximum number of CD-ROM drives we'll detect */

#define MAX_DRIVES	16	

/* A list of available CD-ROM drives */

static char *SDL_cdlist[MAX_DRIVES];

//static dev_t SDL_cdmode[MAX_DRIVES];

/* 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);

/* MCI Timing Functions */

#define	MCI_MMTIMEPERSECOND		3000

#define	FRAMESFROMMM(mmtime)		(((mmtime)*CD_FPS)/MCI_MMTIMEPERSECOND)

/* Ready for MCI CDAudio Devices */

int  SDL_SYS_CDInit(void)

{

int i; /* generig counter */

MCI_SYSINFO_PARMS		msp;	/* Structure to MCI SysInfo parameters */

CHAR 						SysInfoRet[MCI_CMDRETBUFSIZE];	/* Buffer for MCI Command result */

/* 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;

/* Get the number of CD ROMs in the System */

/* Clean SysInfo structure */

SDL_memset(&msp, 0x00, sizeof(MCI_SYSINFO_PARMS));

/* Prepare structure to Ask Numer of Audio CDs */

msp.usDeviceType = MCI_DEVTYPE_CD_AUDIO;	/* CD Audio Type */

msp.pszReturn = (PSZ)&SysInfoRet; 	/* Return Structure */

msp.ulRetSize = MCI_CMDRETBUFSIZE; 	/* Size of ret struct */

if (LOUSHORT(mciSendCommand(0,MCI_SYSINFO, MCI_SYSINFO_QUANTITY | MCI_WAIT, (PVOID)&msp, 0)) != MCIERR_SUCCESS) return(CD_ERROR);

SDL_numcds = atoi(SysInfoRet);

if (SDL_numcds > MAX_DRIVES) SDL_numcds = MAX_DRIVES; /* Limit maximum CD number */

/* Get and Add their system name to the SDL_cdlist */

msp.pszReturn = (PSZ)&SysInfoRet; 				/* Return Structure */

msp.ulRetSize = MCI_CMDRETBUFSIZE; 			/* Size of ret struct */

msp.usDeviceType = MCI_DEVTYPE_CD_AUDIO;		/* CD Audio Type */

for (i=0; i<SDL_numcds; i++)

	{

	msp.ulNumber = i+1;

	mciSendCommand(0,MCI_SYSINFO, MCI_SYSINFO_NAME | MCI_WAIT,&msp, 0);

	SDL_cdlist[i] = SDL_strdup(SysInfoRet);

	if ( SDL_cdlist[i] == NULL )

		{

		SDL_OutOfMemory();

		return(-1);

		}

	}

return(0);

}

/* Return CDAudio System Dependent Device Name - Ready for MCI*/

static const char *SDL_SYS_CDName(int drive)

{

return(SDL_cdlist[drive]);

}

/* Open CDAudio Device - Ready for MCI */

static int SDL_SYS_CDOpen(int drive)

{

MCI_OPEN_PARMS	mop;

MCI_SET_PARMS msp;

MCI_GENERIC_PARMS mgp;

/* Open the device */

mop.hwndCallback = (HWND)NULL;		// None

mop.usDeviceID = (USHORT)NULL;		// Will be returned.

mop.pszDeviceType = (PSZ)SDL_cdlist[drive];		// CDAudio Device

if (LOUSHORT(mciSendCommand(0,MCI_OPEN,MCI_WAIT,&mop, 0)) != MCIERR_SUCCESS) return(CD_ERROR);

/* Set time format */

msp.hwndCallback = (HWND)NULL;		// None

msp.ulTimeFormat = MCI_FORMAT_MSF;	// Minute : Second : Frame structure

msp.ulSpeedFormat = (ULONG)NULL;		// No change

msp.ulAudio = (ULONG)NULL;				// No Channel

msp.ulLevel = (ULONG)NULL;				// No Volume

msp.ulOver = (ULONG)NULL;				// No Delay

msp.ulItem = (ULONG)NULL;				// No item

msp.ulValue = (ULONG)NULL;				// No value for item flag

if (LOUSHORT(mciSendCommand(mop.usDeviceID,MCI_SET,MCI_WAIT | MCI_SET_TIME_FORMAT,&msp, 0)) == MCIERR_SUCCESS) return (mop.usDeviceID);

/* Error setting time format? - Close opened device */

mgp.hwndCallback = (HWND)NULL;		// None

mciSendCommand(mop.usDeviceID,MCI_CLOSE,MCI_WAIT,&mgp, 0);

return(CD_ERROR);

}

/* Get CD Table Of Contents - Ready for MCI */

static int SDL_SYS_CDGetTOC(SDL_CD *cdrom)

{

MCI_TOC_PARMS mtp;

MCI_STATUS_PARMS msp;

MCI_TOC_REC * mtr;

INT i;

/* Correction because MCI cannot read TOC while CD is playing (it'll stop!) */

if (cdrom->status == CD_PLAYING || cdrom->status == CD_PAUSED) return 0;

/* Get Number of Tracks */

msp.hwndCallback = (HWND)NULL; /* None */

msp.ulReturn = (ULONG)NULL; /* We want this information */

msp.ulItem = MCI_STATUS_NUMBER_OF_TRACKS;

msp.ulValue = (ULONG)NULL; /* No additional information */

if (LOUSHORT(mciSendCommand(cdrom->id,MCI_STATUS,MCI_WAIT | MCI_STATUS_ITEM,&msp, 0)) != MCIERR_SUCCESS) return(CD_ERROR);

cdrom->numtracks = msp.ulReturn;

if ( cdrom->numtracks > SDL_MAX_TRACKS )

	{

	cdrom->numtracks = SDL_MAX_TRACKS;

	}

/* Alocate space for TOC data */

mtr = (MCI_TOC_REC *)SDL_malloc(cdrom->numtracks*sizeof(MCI_TOC_REC));

if ( mtr == NULL )

	{

	SDL_OutOfMemory();

	return(-1);

	}

/* Get TOC from CD */

mtp.pBuf = mtr;

mtp.ulBufSize = cdrom->numtracks*sizeof(MCI_TOC_REC);

if (LOUSHORT(mciSendCommand(cdrom->id,MCI_GETTOC,MCI_WAIT,&mtp, 0)) != MCIERR_SUCCESS)

	{

	SDL_OutOfMemory();

	SDL_free(mtr);

	return(CD_ERROR);

	}

/* Fill SDL Tracks Structure */

for (i=0; i<cdrom->numtracks; i++)

	{

	/* Set Track ID */

	cdrom->track[i].id = (mtr+i)->TrackNum;

	/* Set Track Type */

	msp.hwndCallback = (HWND)NULL; /* None */

	msp.ulReturn = (ULONG)NULL; /* We want this information */

	msp.ulItem = MCI_CD_STATUS_TRACK_TYPE;

	msp.ulValue = (ULONG)((mtr+i)->TrackNum); /* Track Number? */

	if (LOUSHORT(mciSendCommand(cdrom->id,MCI_STATUS,MCI_WAIT | MCI_TRACK | MCI_STATUS_ITEM,&msp, 0)) != MCIERR_SUCCESS)

		{

		SDL_free(mtr);

		return (CD_ERROR);

		}

	if (msp.ulReturn==MCI_CD_TRACK_AUDIO) cdrom->track[i].type = SDL_AUDIO_TRACK;

	else cdrom->track[i].type = SDL_DATA_TRACK;

	/* Set Track Length - values from MCI are in MMTIMEs - 3000 MMTIME = 1 second */

	cdrom->track[i].length = FRAMESFROMMM((mtr+i)->ulEndAddr - (mtr+i)->ulStartAddr);

	/* Set Track Offset */

	cdrom->track[i].offset = FRAMESFROMMM((mtr+i)->ulStartAddr);

	}

SDL_free(mtr);

return(0);

}

/* Get CD-ROM status - Ready for MCI */

static CDstatus SDL_SYS_CDStatus(SDL_CD *cdrom, int *position)

{

CDstatus status;

MCI_STATUS_PARMS msp;

/* Get Status from MCI */

msp.hwndCallback = (HWND)NULL; /* None */

msp.ulReturn = (ULONG)NULL; /* We want this information */

msp.ulItem = MCI_STATUS_MODE;

msp.ulValue = (ULONG)NULL; /* No additional information */

if (LOUSHORT(mciSendCommand(cdrom->id,MCI_STATUS,MCI_WAIT | MCI_STATUS_ITEM,&msp, 0)) != MCIERR_SUCCESS) status = CD_ERROR;

else

	{

	switch(msp.ulReturn)

		{

		case	MCI_MODE_NOT_READY:

			status = CD_TRAYEMPTY;

			break;

		case	MCI_MODE_PAUSE:

			status = CD_PAUSED;

			break;

		case	MCI_MODE_PLAY:

			status = CD_PLAYING;

			break;

		case	MCI_MODE_STOP:

			status = CD_STOPPED;

			break;

		/* These cases should not occour */

		case	MCI_MODE_RECORD:

		case	MCI_MODE_SEEK:

		default:

			status = CD_ERROR;

			break;

		}

	}

/* Determine position */

if (position != NULL) /* The SDL $&$&%# CDROM call sends NULL pointer here! */

	{

		if ((status == CD_PLAYING) || (status == CD_PAUSED))

		{

		/* Get Position */

		msp.hwndCallback = (HWND)NULL; /* None */

		msp.ulReturn = (ULONG)NULL; /* We want this information */

		msp.ulItem = MCI_STATUS_POSITION;

		msp.ulValue = (ULONG)NULL; /* No additiona info */

		if (LOUSHORT(mciSendCommand(cdrom->id,MCI_STATUS,MCI_WAIT | MCI_STATUS_ITEM,&msp, 0)) != MCIERR_SUCCESS) return (CD_ERROR);

		/* Convert from MSF (format selected in the Open process) to Frames (format that will be returned) */

		*position = MSF_TO_FRAMES(MSF_MINUTE(msp.ulReturn),MSF_SECOND(msp.ulReturn),MSF_FRAME(msp.ulReturn));

		}

	else *position = 0;

	}

return(status);

}

/* Start play - Ready for MCI */

static int SDL_SYS_CDPlay(SDL_CD *cdrom, int start, int length)

{

MCI_GENERIC_PARMS mgp;

MCI_STATUS_PARMS msp;

MCI_PLAY_PARMS	mpp;

ULONG min,sec,frm;

/* Start MSF */

FRAMES_TO_MSF(start, &min, &sec, &frm);

MSF_MINUTE(mpp.ulFrom) = min;

MSF_SECOND(mpp.ulFrom) = sec;

MSF_FRAME(mpp.ulFrom) = frm;

/* End MSF */

FRAMES_TO_MSF(start+length, &min, &sec, &frm);

MSF_MINUTE(mpp.ulTo) = min;

MSF_SECOND(mpp.ulTo) = sec;

MSF_FRAME(mpp.ulTo) = frm;

#ifdef DEBUG_CDROM

	fprintf(stderr, "Trying to play from %d:%d:%d to %d:%d:%d\n",

	playtime.cdmsf_min0, playtime.cdmsf_sec0, playtime.cdmsf_frame0,

	playtime.cdmsf_min1, playtime.cdmsf_sec1, playtime.cdmsf_frame1);

#endif

/* Verifies if it is paused first... and if it is, unpause before stopping it. */

msp.hwndCallback = (HWND)NULL; /* None */

msp.ulReturn = (ULONG)NULL; /* We want this information */

msp.ulItem = MCI_STATUS_MODE;

msp.ulValue = (ULONG)NULL; /* No additional information */

if (LOUSHORT(mciSendCommand(cdrom->id,MCI_STATUS,MCI_WAIT | MCI_STATUS_ITEM,&msp, 0)) == MCIERR_SUCCESS)

	{

	if (msp.ulReturn == MCI_MODE_PAUSE)

		{

		mgp.hwndCallback = (HWND)NULL;		// None

		mciSendCommand(cdrom->id,MCI_RESUME,0,&mgp, 0);

		}

	}

/* Now play it. */

mpp.hwndCallback = (HWND)NULL;		// We do not want the info. temp

if (LOUSHORT(mciSendCommand(cdrom->id,MCI_PLAY,MCI_FROM | MCI_TO,&mpp, 0)) == MCIERR_SUCCESS) return 0;

return (CD_ERROR);

}

/* Pause play - Ready for MCI */

static int SDL_SYS_CDPause(SDL_CD *cdrom)

{

MCI_GENERIC_PARMS mgp;

mgp.hwndCallback = (HWND)NULL;		// None

if (LOUSHORT(mciSendCommand(cdrom->id,MCI_PAUSE,MCI_WAIT,&mgp, 0)) == MCIERR_SUCCESS) return 0;

return(CD_ERROR);

}

/* Resume play - Ready for MCI */

static int SDL_SYS_CDResume(SDL_CD *cdrom)

{

MCI_GENERIC_PARMS mgp;

mgp.hwndCallback = (HWND)NULL;		// None

if (LOUSHORT(mciSendCommand(cdrom->id,MCI_RESUME,MCI_WAIT,&mgp, 0)) == MCIERR_SUCCESS) return 0;

return(CD_ERROR);

}

/* Stop play - Ready for MCI */

static int SDL_SYS_CDStop(SDL_CD *cdrom)

{

MCI_GENERIC_PARMS mgp;

MCI_STATUS_PARMS msp;

/* Verifies if it is paused first... and if it is, unpause before stopping it. */

msp.hwndCallback = (HWND)NULL; /* None */

msp.ulReturn = (ULONG)NULL; /* We want this information */

msp.ulItem = MCI_STATUS_MODE;

msp.ulValue = (ULONG)NULL; /* No additional information */

if (LOUSHORT(mciSendCommand(cdrom->id,MCI_STATUS,MCI_WAIT | MCI_STATUS_ITEM,&msp, 0)) == MCIERR_SUCCESS)

	{

	if (msp.ulReturn == MCI_MODE_PAUSE)

		{

		mgp.hwndCallback = (HWND)NULL;		// None

		mciSendCommand(cdrom->id,MCI_RESUME,0,&mgp, 0);

		}

	}

/* Now stops the media */

mgp.hwndCallback = (HWND)NULL;		// None

if (LOUSHORT(mciSendCommand(cdrom->id,MCI_STOP,MCI_WAIT,&mgp, 0)) == MCIERR_SUCCESS) return 0;

return(CD_ERROR);

}

/* Eject the CD-ROM - Ready for MCI */

static int SDL_SYS_CDEject(SDL_CD *cdrom)

{

MCI_SET_PARMS msp;

msp.hwndCallback = (HWND)NULL;		// None

msp.ulTimeFormat = (ULONG)NULL;		// No change

msp.ulSpeedFormat = (ULONG)NULL;		// No change

msp.ulAudio = (ULONG)NULL;				// No Channel

msp.ulLevel = (ULONG)NULL;				// No Volume

msp.ulOver = (ULONG)NULL;				// No Delay

msp.ulItem = (ULONG)NULL;					// No item

msp.ulValue = (ULONG)NULL;					// No value for item flag

if (LOUSHORT(mciSendCommand(cdrom->id,MCI_SET,MCI_WAIT | MCI_SET_DOOR_OPEN,&msp, 0)) == MCIERR_SUCCESS) return 0;

return(CD_ERROR);

}

/* Close the CD-ROM handle - Ready for MCI */

static void SDL_SYS_CDClose(SDL_CD *cdrom)

{

MCI_GENERIC_PARMS mgp;

mgp.hwndCallback = (HWND)NULL;		// None

mciSendCommand(cdrom->id,MCI_CLOSE,MCI_WAIT,&mgp, 0);

}

/* Finalize CDROM Subsystem - Ready for MCI */

void SDL_SYS_CDQuit(void)

{

int i;

if ( SDL_numcds > 0 )

	{

	for ( i=0; i<SDL_numcds; ++i )

		{

		SDL_free(SDL_cdlist[i]);

		}

	SDL_numcds = 0;

	}

}

#endif /* SDL_CDROM_OS2 */