/*
SDL - Simple DirectMedia Layer
Copyright (C) 1997-2012 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
Carsten Griwodz
griff@kom.tu-darmstadt.de
based on linux/SDL_syscdrom.c by Sam Lantinga
*/
#include "SDL_config.h"
#ifdef SDL_CDROM_AIX
/* Functions for system-level CD-ROM audio control */
/*#define DEBUG_CDROM 1*/
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <errno.h>
#include <unistd.h>
#include <sys/ioctl.h>
#include <sys/devinfo.h>
#include <sys/mntctl.h>
#include <sys/statfs.h>
#include <sys/vmount.h>
#include <fstab.h>
#include <sys/scdisk.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);
static int SDL_SYS_CDioctl(int id, int command, void *arg);
/* Check a drive to see if it is a CD-ROM */
static int CheckDrive(char *drive, struct stat *stbuf)
{
int is_cd;
int cdfd;
int ret;
struct devinfo 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 ) {
ret = SDL_SYS_CDioctl( cdfd, IOCINFO, &info );
if ( ret < 0 ) {
/* Some kind of error */
is_cd = 0;
} else {
if ( info.devtype == DD_CDROM ) {
is_cd = 1;
} else {
is_cd = 0;
}
}
close(cdfd);
}
#ifdef DEBUG_CDROM
else
{
fprintf(stderr, "Could not open drive %s (%s)\n", drive, strerror(errno));
}
#endif
}
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
}
}
static void CheckMounts()
{
char* buffer;
int bufsz;
struct vmount* ptr;
int ret;
buffer = (char*)SDL_malloc(10);
bufsz = 10;
if ( buffer==NULL )
{
fprintf(stderr, "Could not allocate 10 bytes in aix/SDL_syscdrom.c:CheckMounts\n" );
exit ( -10 );
}
do
{
/* mntctrl() returns an array of all mounted filesystems */
ret = mntctl ( MCTL_QUERY, bufsz, buffer );
if ( ret == 0 )
{
/* Buffer was too small, realloc. */
bufsz = *(int*)buffer; /* Required size is in first word. */
/* (whatever a word is in AIX 4.3.3) */
/* int seems to be OK in 32bit mode. */
SDL_free(buffer);
buffer = (char*)SDL_malloc(bufsz);
if ( buffer==NULL )
{
fprintf(stderr,
"Could not allocate %d bytes in aix/SDL_syscdrom.c:CheckMounts\n",
bufsz );
exit ( -10 );
}
}
else if ( ret < 0 )
{
#ifdef DEBUG_CDROM
fprintf(stderr, "Error reading vmount structures\n");
#endif
return;
}
}
while ( ret == 0 );
#ifdef DEBUG_CDROM
fprintf ( stderr, "Read %d vmount structures\n",ret );
#endif
ptr = (struct vmount*)buffer;
do
{
switch(ptr->vmt_gfstype)
{
case MNT_CDROM :
{
struct stat stbuf;
char* text;
text = (char*)ptr + ptr->vmt_data[VMT_OBJECT].vmt_off;
#ifdef DEBUG_CDROM
fprintf(stderr, "Checking mount path: %s mounted on %s\n",
text, (char*)ptr + ptr->vmt_data[VMT_STUB].vmt_off );
#endif
if ( CheckDrive( text, &stbuf) > 0)
{
AddDrive( text, &stbuf);
}
}
break;
default :
break;
}
ptr = (struct vmount*)((char*)ptr + ptr->vmt_length);
ret--;
}
while ( ret > 0 );
free ( buffer );
}
static int CheckNonmounts()
{
#ifdef _THREAD_SAFE
AFILE_t fsFile = NULL;
int passNo = 0;
int ret;
struct fstab entry;
struct stat stbuf;
ret = setfsent_r( &fsFile, &passNo );
if ( ret != 0 ) return -1;
do
{
ret = getfsent_r ( &entry, &fsFile, &passNo );
if ( ret == 0 ) {
char* l = SDL_strrchr(entry.fs_spec,'/');
if ( l != NULL ) {
if ( !SDL_strncmp("cd",++l,2) ) {
#ifdef DEBUG_CDROM
fprintf(stderr,
"Found unmounted CD ROM drive with device name %s\n",
entry.fs_spec);
#endif
if ( CheckDrive( entry.fs_spec, &stbuf) > 0)
{
AddDrive( entry.fs_spec, &stbuf);
}
}
}
}
}
while ( ret == 0 );
ret = endfsent_r ( &fsFile );
if ( ret != 0 ) return -1;
return 0;
#else
struct fstab* entry;
struct stat stbuf;
setfsent();
do
{
entry = getfsent();
if ( entry != NULL ) {
char* l = SDL_strrchr(entry->fs_spec,'/');
if ( l != NULL ) {
if ( !SDL_strncmp("cd",++l,2) ) {
#ifdef DEBUG_CDROM
fprintf(stderr,"Found unmounted CD ROM drive with device name %s", entry->fs_spec);
#endif
if ( CheckDrive( entry->fs_spec, &stbuf) > 0)
{
AddDrive( entry->fs_spec, &stbuf);
}
}
}
}
}
while ( entry != NULL );
endfsent();
#endif
}
int SDL_SYS_CDInit(void)
{
char *SDLcdrom;
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';
}
#ifdef DEBUG_CDROM
fprintf(stderr, "Checking CD-ROM drive from SDL_CDROM: %s\n", SDLcdrom);
#endif
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);
}
}
CheckMounts();
CheckNonmounts();
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)
{
int fd;
char* lastsl;
char* cdromname;
size_t len;
/*
* We found /dev/cd? drives and that is in our list. But we can
* open only the /dev/rcd? versions of those devices for Audio CD.
*/
len = SDL_strlen(SDL_cdlist[drive])+2;
cdromname = (char*)SDL_malloc(len);
SDL_strlcpy(cdromname,SDL_cdlist[drive],len);
lastsl = SDL_strrchr(cdromname,'/');
if (lastsl) {
*lastsl = 0;
SDL_strlcat(cdromname,"/r",len);
lastsl = SDL_strrchr(SDL_cdlist[drive],'/');
if (lastsl) {
lastsl++;
SDL_strlcat(cdromname,lastsl,len);
}
}
#ifdef DEBUG_CDROM
fprintf(stderr, "Should open drive %s, opening %s\n", SDL_cdlist[drive], cdromname);
#endif
/*
* Use exclusive access. Don't use SC_DIAGNOSTICS as xmcd does because they
* require root priviledges, and we don't want that. SC_SINGLE provides
* exclusive access with less trouble.
*/
fd = openx(cdromname, O_RDONLY, NULL, SC_SINGLE);
if ( fd < 0 )
{
#ifdef DEBUG_CDROM
fprintf(stderr, "Could not open drive %s (%s)\n", cdromname, strerror(errno));
#endif
}
else
{
struct mode_form_op cdMode;
int ret;
#ifdef DEBUG_CDROM
cdMode.action = CD_GET_MODE;
ret = SDL_SYS_CDioctl(fd, DK_CD_MODE, &cdMode);
if ( ret < 0 ) {
fprintf(stderr,
"Could not get drive mode for %s (%s)\n",
cdromname, strerror(errno));
} else {
switch(cdMode.cd_mode_form) {
case CD_MODE1 :
fprintf(stderr,
"Drive mode for %s is %s\n",
cdromname, "CD-ROM Data Mode 1");
break;
case CD_MODE2_FORM1 :
fprintf(stderr,
"Drive mode for %s is %s\n",
cdromname, "CD-ROM XA Data Mode 2 Form 1");
break;
case CD_MODE2_FORM2 :
fprintf(stderr,
"Drive mode for %s is %s\n",
cdromname, "CD-ROM XA Data Mode 2 Form 2");
break;
case CD_DA :
fprintf(stderr,
"Drive mode for %s is %s\n",
cdromname, "CD-DA");
break;
default :
fprintf(stderr,
"Drive mode for %s is %s\n",
cdromname, "unknown");
break;
}
}
#endif
cdMode.action = CD_CHG_MODE;
cdMode.cd_mode_form = CD_DA;
ret = SDL_SYS_CDioctl(fd, DK_CD_MODE, &cdMode);
if ( ret < 0 ) {
#ifdef DEBUG_CDROM
fprintf(stderr,
"Could not set drive mode for %s (%s)\n",
cdromname, strerror(errno));
#endif
SDL_SetError("ioctl() error: Could not set CD drive mode, %s",
strerror(errno));
} else {
#ifdef DEBUG_CDROM
fprintf(stderr,
"Drive mode for %s set to CD_DA\n",
cdromname);
#endif
}
}
SDL_free(cdromname);
return fd;
}
static int SDL_SYS_CDGetTOC(SDL_CD *cdrom)
{
struct cd_audio_cmd cmd;
struct cd_audio_cmd entry;
int i;
int okay;
cmd.audio_cmds = CD_TRK_INFO_AUDIO;
cmd.msf_flag = FALSE;
if ( SDL_SYS_CDioctl(cdrom->id, DKAUDIO, &cmd) < 0 ) {
return -1;
}
okay = 0;
cdrom->numtracks = cmd.indexing.track_index.last_track
- cmd.indexing.track_index.first_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;;
} else {
cdrom->track[i].id = cmd.indexing.track_index.first_track+i;
}
entry.audio_cmds = CD_GET_TRK_MSF;
entry.indexing.track_msf.track = cdrom->track[i].id;
if ( SDL_SYS_CDioctl(cdrom->id, DKAUDIO, &entry) < 0 ) {
break;
} else {
cdrom->track[i].type = 0; /* don't know how to detect 0x04 data track */
cdrom->track[i].offset = MSF_TO_FRAMES(
entry.indexing.track_msf.mins,
entry.indexing.track_msf.secs,
entry.indexing.track_msf.frames);
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 cd_audio_cmd cmd;
cmd.audio_cmds = CD_INFO_AUDIO;
if ( SDL_SYS_CDioctl(cdrom->id, DKAUDIO, &cmd) < 0 ) {
#ifdef DEBUG_CDROM
fprintf(stderr, "ioctl failed in SDL_SYS_CDStatus (%s)\n", SDL_GetError());
#endif
status = CD_ERROR;
} else {
switch (cmd.status) {
case CD_NO_AUDIO:
case CD_COMPLETED:
status = CD_STOPPED;
break;
case CD_PLAY_AUDIO:
status = CD_PLAYING;
break;
case CD_PAUSE_AUDIO:
status = CD_PAUSED;
break;
case CD_NOT_VALID:
#ifdef DEBUG_CDROM
fprintf(stderr, "cdStatus failed with CD_NOT_VALID\n");
#endif
status = CD_ERROR;
break;
case CD_STATUS_ERROR:
#ifdef DEBUG_CDROM
fprintf(stderr, "cdStatus failed with CD_STATUS_ERROR\n");
#endif
status = CD_ERROR;
break;
default:
#ifdef DEBUG_CDROM
fprintf(stderr, "cdStatus failed with unknown error\n");
#endif
status = CD_ERROR;
break;
}
}
if ( position ) {
if ( status == CD_PLAYING || (status == CD_PAUSED) ) {
*position = MSF_TO_FRAMES( cmd.indexing.info_audio.current_mins,
cmd.indexing.info_audio.current_secs,
cmd.indexing.info_audio.current_frames);
} else {
*position = 0;
}
}
return status;
}
/* Start play */
static int SDL_SYS_CDPlay(SDL_CD *cdrom, int start, int length)
{
struct cd_audio_cmd cmd;
/*
* My CD Rom is muted by default. I think I read that this is new with
* AIX 4.3. SDL does not change the volume, so I need a kludge. Maybe
* its better to do this elsewhere?
*/
cmd.audio_cmds = CD_PLAY_AUDIO | CD_SET_VOLUME;
cmd.msf_flag = TRUE;
FRAMES_TO_MSF(start,
&cmd.indexing.msf.first_mins,
&cmd.indexing.msf.first_secs,
&cmd.indexing.msf.first_frames);
FRAMES_TO_MSF(start+length,
&cmd.indexing.msf.last_mins,
&cmd.indexing.msf.last_secs,
&cmd.indexing.msf.last_frames);
cmd.volume_type = CD_VOLUME_ALL;
cmd.all_channel_vol = 255; /* This is a uchar. What is a good value? No docu! */
cmd.out_port_0_sel = CD_AUDIO_CHNL_0;
cmd.out_port_1_sel = CD_AUDIO_CHNL_1;
cmd.out_port_2_sel = CD_AUDIO_CHNL_2;
cmd.out_port_3_sel = CD_AUDIO_CHNL_3;
#ifdef DEBUG_CDROM
fprintf(stderr, "Trying to play from %d:%d:%d to %d:%d:%d\n",
cmd.indexing.msf.first_mins,
cmd.indexing.msf.first_secs,
cmd.indexing.msf.first_frames,
cmd.indexing.msf.last_mins,
cmd.indexing.msf.last_secs,
cmd.indexing.msf.last_frames);
#endif
return(SDL_SYS_CDioctl(cdrom->id, DKAUDIO, &cmd));
}
/* Pause play */
static int SDL_SYS_CDPause(SDL_CD *cdrom)
{
struct cd_audio_cmd cmd;
cmd.audio_cmds = CD_PAUSE_AUDIO;
return(SDL_SYS_CDioctl(cdrom->id, DKAUDIO, &cmd));
}
/* Resume play */
static int SDL_SYS_CDResume(SDL_CD *cdrom)
{
struct cd_audio_cmd cmd;
cmd.audio_cmds = CD_RESUME_AUDIO;
return(SDL_SYS_CDioctl(cdrom->id, DKAUDIO, &cmd));
}
/* Stop play */
static int SDL_SYS_CDStop(SDL_CD *cdrom)
{
struct cd_audio_cmd cmd;
cmd.audio_cmds = CD_STOP_AUDIO;
return(SDL_SYS_CDioctl(cdrom->id, DKAUDIO, &cmd));
}
/* Eject the CD-ROM */
static int SDL_SYS_CDEject(SDL_CD *cdrom)
{
return(SDL_SYS_CDioctl(cdrom->id, DKEJECT, 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_AIX */