view src/cdrom/freebsd/SDL_syscdrom.c @ 4170:092c0bc69155 SDL-1.2

Fixed bug #618 Description From Tim Angus 2008-08-30 12:23:56 (-) [reply] As we all know SDL 1.2 doesn't handle dead keys well since one key press potentially equals two (or more) characters. For example, on many layouts, keying <backquote>,<space> results in <no character>,<backquote><space>. Since the unicode member of the SDL_keysym struct only has room for one character, only one can be returned. On Linux, the first character is returned. On Windows however, unless the exact number of characters generated by the keypress is 1, nothing is returned. The following patch addresses this inconsistency. Updated patch which includes a further fix to the handling of the numpad when numlock is on. This further fix is courtesy Amanieu d'Antras.
author Sam Lantinga <slouken@libsdl.org>
date Mon, 13 Apr 2009 08:42:09 +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_FREEBSD

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

#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <errno.h>
#include <unistd.h>
#include <sys/cdio.h>

#include "SDL_cdrom.h"
#include "../SDL_syscdrom.h"


/* 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);

/* Some ioctl() errno values which occur when the tray is empty */
#define ERRNO_TRAYEMPTY(errno)	\
	((errno == EIO) || (errno == ENOENT) || (errno == EINVAL))

/* Check a drive to see if it is a CD-ROM */
static int CheckDrive(char *drive, struct stat *stbuf)
{
	int is_cd, cdfd;
	struct ioc_read_subchannel info;

	/* If it doesn't exist, return -1 */
	if ( stat(drive, stbuf) < 0 ) {
		return(-1);
	}

	/* If it does exist, verify that it's an available CD-ROM */
	is_cd = 0;
	if ( S_ISCHR(stbuf->st_mode) || S_ISBLK(stbuf->st_mode) ) {
		cdfd = open(drive, (O_RDONLY|O_EXCL|O_NONBLOCK), 0);
		if ( cdfd >= 0 ) {
			info.address_format = CD_MSF_FORMAT;
			info.data_format = CD_CURRENT_POSITION;
			info.data_len = 0;
			info.data = NULL;
			/* Under Linux, EIO occurs when a disk is not present.
			   This isn't 100% reliable, so we use the USE_MNTENT
			   code above instead.
			 */
			if ( (ioctl(cdfd, CDIOCREADSUBCHANNEL, &info) == 0) ||
						ERRNO_TRAYEMPTY(errno) ) {
				is_cd = 1;
			}
			close(cdfd);
		}
	}
	return(is_cd);
}

/* Add a CD-ROM drive to our list of valid drives */
static void AddDrive(char *drive, struct stat *stbuf)
{
	int i;

	if ( SDL_numcds < MAX_DRIVES ) {
		/* Check to make sure it's not already in our list.
	 	   This can happen when we see a drive via symbolic link.
		 */
		for ( i=0; i<SDL_numcds; ++i ) {
			if ( stbuf->st_rdev == SDL_cdmode[i] ) {
#ifdef DEBUG_CDROM
  fprintf(stderr, "Duplicate drive detected: %s == %s\n", drive, SDL_cdlist[i]);
#endif
				return;
			}
		}

		/* Add this drive to our list */
		i = SDL_numcds;
		SDL_cdlist[i] = SDL_strdup(drive);
		if ( SDL_cdlist[i] == NULL ) {
			SDL_OutOfMemory();
			return;
		}
		SDL_cdmode[i] = stbuf->st_rdev;
		++SDL_numcds;
#ifdef DEBUG_CDROM
  fprintf(stderr, "Added CD-ROM drive: %s\n", drive);
#endif
	}
}

int  SDL_SYS_CDInit(void)
{
	/* checklist: /dev/cdrom,/dev/cd?c /dev/acd?c
			/dev/matcd?c /dev/mcd?c /dev/scd?c */
	static char *checklist[] = {
	"cdrom", "?0 cd?", "?0 acd?", "?0 matcd?", "?0 mcd?", "?0 scd?",NULL
	};
	char *SDLcdrom;
	int i, j, exists;
	char drive[32];
	struct stat stbuf;

	/* 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;

	/* Look in the environment for our CD-ROM drive list */
	SDLcdrom = SDL_getenv("SDL_CDROM");	/* ':' separated list of devices */
	if ( SDLcdrom != NULL ) {
		char *cdpath, *delim;
		size_t len = SDL_strlen(SDLcdrom)+1;
		cdpath = SDL_stack_alloc(char, len);
		if ( cdpath != NULL ) {
			SDL_strlcpy(cdpath, SDLcdrom, len);
			SDLcdrom = cdpath;
			do {
				delim = SDL_strchr(SDLcdrom, ':');
				if ( delim ) {
					*delim++ = '\0';
				}
				if ( CheckDrive(SDLcdrom, &stbuf) > 0 ) {
					AddDrive(SDLcdrom, &stbuf);
				}
				if ( delim ) {
					SDLcdrom = delim;
				} else {
					SDLcdrom = NULL;
				}
			} while ( SDLcdrom );
			SDL_stack_free(cdpath);
		}

		/* If we found our drives, there's nothing left to do */
		if ( SDL_numcds > 0 ) {
			return(0);
		}
	}

	/* Scan the system for CD-ROM drives */
	for ( i=0; checklist[i]; ++i ) {
		if ( checklist[i][0] == '?' ) {
			char *insert;
			exists = 1;
			for ( j=checklist[i][1]; exists; ++j ) {
				SDL_snprintf(drive, SDL_arraysize(drive), "/dev/%sc", &checklist[i][3]);
				insert = SDL_strchr(drive, '?');
				if ( insert != NULL ) {
					*insert = j;
				}
				switch (CheckDrive(drive, &stbuf)) {
					/* Drive exists and is a CD-ROM */
					case 1:
						AddDrive(drive, &stbuf);
						break;
					/* Drive exists, but isn't a CD-ROM */
					case 0:
						break;
					/* Drive doesn't exist */
					case -1:
						exists = 0;
						break;
				}
			}
		} else {
			SDL_snprintf(drive, SDL_arraysize(drive), "/dev/%s", checklist[i]);
			if ( CheckDrive(drive, &stbuf) > 0 ) {
				AddDrive(drive, &stbuf);
			}
		}
	}
	return(0);
}

/* General ioctl() CD-ROM command function */
static int SDL_SYS_CDioctl(int id, int command, void *arg)
{
	int retval;

	retval = ioctl(id, command, arg);
	if ( retval < 0 ) {
		SDL_SetError("ioctl() error: %s", strerror(errno));
	}
	return(retval);
}

static const char *SDL_SYS_CDName(int drive)
{
	return(SDL_cdlist[drive]);
}

static int SDL_SYS_CDOpen(int drive)
{
	return(open(SDL_cdlist[drive], (O_RDONLY|O_EXCL|O_NONBLOCK), 0));
}

static int SDL_SYS_CDGetTOC(SDL_CD *cdrom)
{
	struct ioc_toc_header toc;
	int i, okay;
	struct ioc_read_toc_entry entry;
	struct cd_toc_entry data;

	okay = 0;
	if ( SDL_SYS_CDioctl(cdrom->id, CDIOREADTOCHEADER, &toc) == 0 ) {
		cdrom->numtracks = toc.ending_track-toc.starting_track+1;
		if ( cdrom->numtracks > SDL_MAX_TRACKS ) {
			cdrom->numtracks = SDL_MAX_TRACKS;
		}
		/* Read all the track TOC entries */
		for ( i=0; i<=cdrom->numtracks; ++i ) {
			if ( i == cdrom->numtracks ) {
				cdrom->track[i].id = 0xAA; /* CDROM_LEADOUT */
			} else {
				cdrom->track[i].id = toc.starting_track+i;
			}
			entry.starting_track = cdrom->track[i].id;
			entry.address_format = CD_MSF_FORMAT;
			entry.data_len = sizeof(data);
			entry.data = &data;
			if ( SDL_SYS_CDioctl(cdrom->id, CDIOREADTOCENTRYS,
								&entry) < 0 ) {
				break;
			} else {
				cdrom->track[i].type = data.control;
				cdrom->track[i].offset = MSF_TO_FRAMES(
						data.addr.msf.minute,
						data.addr.msf.second,
						data.addr.msf.frame);
				cdrom->track[i].length = 0;
				if ( i > 0 ) {
					cdrom->track[i-1].length =
						cdrom->track[i].offset-
						cdrom->track[i-1].offset;
				}
			}
		}
		if ( i == (cdrom->numtracks+1) ) {
			okay = 1;
		}
	}
	return(okay ? 0 : -1);
}

/* Get CD-ROM status */
static CDstatus SDL_SYS_CDStatus(SDL_CD *cdrom, int *position)
{
	CDstatus status;
	struct ioc_toc_header toc;
	struct ioc_read_subchannel info;
	struct cd_sub_channel_info data;

	info.address_format = CD_MSF_FORMAT;
	info.data_format = CD_CURRENT_POSITION;
	info.track = 0;
	info.data_len = sizeof(data);
	info.data = &data;
	if ( ioctl(cdrom->id, CDIOCREADSUBCHANNEL, &info) < 0 ) {
		if ( ERRNO_TRAYEMPTY(errno) ) {
			status = CD_TRAYEMPTY;
		} else {
			status = CD_ERROR;
		}
	} else {
		switch (data.header.audio_status) {
			case CD_AS_AUDIO_INVALID:
			case CD_AS_NO_STATUS:
				/* Try to determine if there's a CD available */
				if (ioctl(cdrom->id,CDIOREADTOCHEADER,&toc)==0)
					status = CD_STOPPED;
				else
					status = CD_TRAYEMPTY;
				break;
			case CD_AS_PLAY_COMPLETED:
				status = CD_STOPPED;
				break;
			case CD_AS_PLAY_IN_PROGRESS:
				status = CD_PLAYING;
				break;
			case CD_AS_PLAY_PAUSED:
				status = CD_PAUSED;
				break;
			default:
				status = CD_ERROR;
				break;
		}
	}
	if ( position ) {
		if ( status == CD_PLAYING || (status == CD_PAUSED) ) {
			*position = MSF_TO_FRAMES(
					data.what.position.absaddr.msf.minute,
					data.what.position.absaddr.msf.second,
					data.what.position.absaddr.msf.frame);
		} else {
			*position = 0;
		}
	}
	return(status);
}

/* Start play */
static int SDL_SYS_CDPlay(SDL_CD *cdrom, int start, int length)
{
	struct ioc_play_msf playtime;

	FRAMES_TO_MSF(start,
		&playtime.start_m, &playtime.start_s, &playtime.start_f);
	FRAMES_TO_MSF(start+length,
		&playtime.end_m, &playtime.end_s, &playtime.end_f);
#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
	ioctl(cdrom->id, CDIOCSTART, 0);
	return(SDL_SYS_CDioctl(cdrom->id, CDIOCPLAYMSF, &playtime));
}

/* Pause play */
static int SDL_SYS_CDPause(SDL_CD *cdrom)
{
	return(SDL_SYS_CDioctl(cdrom->id, CDIOCPAUSE, 0));
}

/* Resume play */
static int SDL_SYS_CDResume(SDL_CD *cdrom)
{
	return(SDL_SYS_CDioctl(cdrom->id, CDIOCRESUME, 0));
}

/* Stop play */
static int SDL_SYS_CDStop(SDL_CD *cdrom)
{
	return(SDL_SYS_CDioctl(cdrom->id, CDIOCSTOP, 0));
}

/* Eject the CD-ROM */
static int SDL_SYS_CDEject(SDL_CD *cdrom)
{
	return(SDL_SYS_CDioctl(cdrom->id, CDIOCEJECT, 0));
}

/* Close the CD-ROM handle */
static void SDL_SYS_CDClose(SDL_CD *cdrom)
{
	close(cdrom->id);
}

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_FREEBSD */