454 lines
12 KiB
C
454 lines
12 KiB
C
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/*
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Tru64 audio module for SDL (Simple DirectMedia Layer)
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Copyright (C) 2003
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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 Library General Public
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License as published by the Free Software Foundation; either
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version 2 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,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with this library; if not, write to the Free
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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/* Functions for system-level CD-ROM audio control */
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//#define DEBUG_CDROM 1
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <io/cam/cdrom.h>
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#include <io/cam/rzdisk.h>
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#include <io/common/devgetinfo.h>
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#include <alloca.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include <errno.h>
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#include "SDL_error.h"
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#include "SDL_cdrom.h"
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#include "SDL_syscdrom.h"
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/* The maximum number of CD-ROM drives we'll detect */
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#define MAX_DRIVES 16
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/* A list of available CD-ROM drives */
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static char *SDL_cdlist[MAX_DRIVES];
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static dev_t SDL_cdmode[MAX_DRIVES];
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/* The system-dependent CD control functions */
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static const char *SDL_SYS_CDName(int drive);
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static int SDL_SYS_CDOpen(int drive);
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static int SDL_SYS_CDGetTOC(SDL_CD *cdrom);
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static CDstatus SDL_SYS_CDStatus(SDL_CD *cdrom, int *position);
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static int SDL_SYS_CDPlay(SDL_CD *cdrom, int start, int length);
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static int SDL_SYS_CDPause(SDL_CD *cdrom);
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static int SDL_SYS_CDResume(SDL_CD *cdrom);
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static int SDL_SYS_CDStop(SDL_CD *cdrom);
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static int SDL_SYS_CDEject(SDL_CD *cdrom);
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static void SDL_SYS_CDClose(SDL_CD *cdrom);
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/* Some ioctl() errno values which occur when the tray is empty */
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#define ERRNO_TRAYEMPTY(errno) \
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((errno == EIO) || (errno == ENOENT) || (errno == EINVAL))
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/* Check a drive to see if it is a CD-ROM */
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/* Caution!! Not tested. */
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static int CheckDrive(char *drive, struct stat *stbuf)
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{
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int is_cd, cdfd;
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struct cd_sub_channel info;
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/* If it doesn't exist, return -1 */
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if ( stat(drive, stbuf) < 0 ) {
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return(-1);
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}
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/* If it does exist, verify that it's an available CD-ROM */
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is_cd = 0;
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if ( S_ISCHR(stbuf->st_mode) || S_ISBLK(stbuf->st_mode) ) {
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cdfd = open(drive, (O_RDWR|O_NDELAY), 0);
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if ( cdfd >= 0 ) {
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info.sch_address_format = CDROM_MSF_FORMAT;
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info.sch_data_format = CDROM_CURRENT_POSITION;
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info.sch_alloc_length = 0;
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info.sch_track_number = 0;
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info.sch_buffer = NULL;
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/*
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*
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* Under Linux, EIO occurs when a disk is not present.
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* This isn't 100% reliable, so we use the USE_MNTENT
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* code above instead.
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*
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*/
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if ( (ioctl(cdfd, CDROM_READ_SUBCHANNEL, &info) == 0) ||
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ERRNO_TRAYEMPTY(errno) ) {
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is_cd = 1;
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}
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close(cdfd);
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}
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}
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return(is_cd);
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}
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/* Add a CD-ROM drive to our list of valid drives */
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static void AddDrive(char *drive, struct stat *stbuf)
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{
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int i;
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if ( SDL_numcds < MAX_DRIVES ) {
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/* Check to make sure it's not already in our list.
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* This can happen when we see a drive via symbolic link.
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*
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* /
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for ( i=0; i<SDL_numcds; ++i ) {
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if ( stbuf->st_rdev == SDL_cdmode[i] ) {
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#ifdef DEBUG_CDROM
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fprintf(stderr, "Duplicate drive detected: %s == %s\n", drive, SDL_cdlist[i]);
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#endif
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return;
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}
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}
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/* Add this drive to our list */
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i = SDL_numcds;
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SDL_cdlist[i] = (char *)malloc(strlen(drive)+1);
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if ( SDL_cdlist[i] == NULL ) {
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SDL_OutOfMemory();
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return;
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}
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strcpy(SDL_cdlist[i], drive);
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SDL_cdmode[i] = stbuf->st_rdev;
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++SDL_numcds;
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#ifdef DEBUG_CDROM
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fprintf(stderr, "Added CD-ROM drive: %s\n", drive);
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#endif
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}
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}
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int SDL_SYS_CDInit(void)
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{
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/* checklist: /dev/cdrom,/dev/cd?c /dev/acd?c
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* /dev/matcd?c /dev/mcd?c /dev/scd?c
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*
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*/
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static char *checklist[] = {
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"?0 rdisk/cdrom?",NULL};
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char drive[32];
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char *SDLcdrom;
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int i, j, exists;
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struct stat stbuf;
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/* Fill in our driver capabilities */
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SDL_CDcaps.Name = SDL_SYS_CDName;
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SDL_CDcaps.Open = SDL_SYS_CDOpen;
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SDL_CDcaps.GetTOC = SDL_SYS_CDGetTOC;
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SDL_CDcaps.Status = SDL_SYS_CDStatus;
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SDL_CDcaps.Play = SDL_SYS_CDPlay;
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SDL_CDcaps.Pause = SDL_SYS_CDPause;
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SDL_CDcaps.Resume = SDL_SYS_CDResume;
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SDL_CDcaps.Stop = SDL_SYS_CDStop;
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SDL_CDcaps.Eject = SDL_SYS_CDEject;
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SDL_CDcaps.Close = SDL_SYS_CDClose;
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/* Look in the environment for our CD-ROM drive list */
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SDLcdrom = getenv("SDL_CDROM"); /* ':' separated list of devices */
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if ( SDLcdrom != NULL ) {
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char *cdpath, *delim;
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cdpath = malloc(strlen(SDLcdrom)+1);
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if ( cdpath != NULL ) {
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strcpy(cdpath, SDLcdrom);
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SDLcdrom = cdpath;
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do {
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delim = strchr(SDLcdrom, ':');
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if ( delim ) {
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*delim++ = '\0';
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}
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if ( CheckDrive(SDLcdrom, &stbuf) > 0 ) {
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AddDrive(SDLcdrom, &stbuf);
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}
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if ( delim ) {
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SDLcdrom = delim;
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} else {
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SDLcdrom = NULL;
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}
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} while ( SDLcdrom );
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free(cdpath);
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}
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/* If we found our drives, there's nothing left to do */
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if ( SDL_numcds > 0 ) {
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return(0);
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}
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}
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/* Scan the system for CD-ROM drives */
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for ( i=0; checklist[i]; ++i ) {
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if ( checklist[i][0] == '?' ) {
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char *insert;
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exists = 1;
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for ( j=checklist[i][1]; exists; ++j ) {
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sprintf(drive, "/dev/%sc", &checklist[i][3]);
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insert = strchr(drive, '?');
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if ( insert != NULL ) {
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*insert = j;
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}
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switch (CheckDrive(drive, &stbuf)) {
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/* Drive exists and is a CD-ROM */
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case 1:
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AddDrive(drive, &stbuf);
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break;
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/* Drive exists, but isn't a CD-ROM */
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case 0:
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break;
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/* Drive doesn't exist */
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case -1:
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exists = 0;
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break;
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}
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}
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} else {
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sprintf(drive, "/dev/%s", checklist[i]);
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if ( CheckDrive(drive, &stbuf) > 0 ) {
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AddDrive(drive, &stbuf);
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}
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}
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}
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/*
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SDLcdrom=malloc(sizeof(char) * 32);
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strcpy(SDLcdrom,"/dev/rdisk/cdrom0c");
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SDL_cdlist[0] = SDLcdrom;
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stat(SDLcdrom, &stbuf);
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SDL_cdmode[0] = stbuf.st_rdev;
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SDL_numcds = 1;
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*/
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return (0);
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}
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static const char *SDL_SYS_CDName(int drive)
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{
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return(SDL_cdlist[drive]);
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}
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static int SDL_SYS_CDOpen(int drive)
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{
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/* O_RDWR: To use ioctl(fd, SCSI_STOP_UNIT) */
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return(open(SDL_cdlist[drive], (O_RDWR|O_NDELAY), 0));
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}
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static int SDL_SYS_CDGetTOC(SDL_CD *cdrom)
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{
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struct cd_toc toc;
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struct cd_toc_header hdr;
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struct cd_toc_entry *cdte;
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int i;
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int okay = 0;
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if ( ioctl(cdrom->id, CDROM_TOC_HEADER, &hdr) ) {
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fprintf(stderr,"ioctl error CDROM_TOC_HEADER\n");
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return -1;
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}
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cdrom->numtracks = hdr.th_ending_track - hdr.th_starting_track + 1;
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if ( cdrom->numtracks > SDL_MAX_TRACKS ) {
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cdrom->numtracks = SDL_MAX_TRACKS;
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}
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#ifdef DEBUG_CDROM
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fprintf(stderr,"hdr.th_data_len1 = %d\n", hdr.th_data_len1);
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fprintf(stderr,"hdr.th_data_len0 = %d\n", hdr.th_data_len0);
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fprintf(stderr,"hdr.th_starting_track = %d\n", hdr.th_starting_track);
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fprintf(stderr,"hdr.th_ending_track = %d\n", hdr.th_ending_track);
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fprintf(stderr,"cdrom->numtracks = %d\n", cdrom->numtracks);
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#endif
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toc.toc_address_format = CDROM_LBA_FORMAT;
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toc.toc_starting_track = 0;
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toc.toc_alloc_length = (hdr.th_data_len1 << 8) +
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hdr.th_data_len0 + sizeof(hdr);
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if ( (toc.toc_buffer = alloca(toc.toc_alloc_length)) == NULL) {
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fprintf(stderr,"cannot allocate toc.toc_buffer\n");
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return -1;
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}
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bzero (toc.toc_buffer, toc.toc_alloc_length);
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if (ioctl(cdrom->id, CDROM_TOC_ENTRYS, &toc)) {
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fprintf(stderr,"ioctl error CDROM_TOC_ENTRYS\n");
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return -1;
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}
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(char *)cdte = toc.toc_buffer + sizeof(hdr);
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for (i=0; i <= cdrom->numtracks; ++i) {
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if (i == cdrom->numtracks ) {
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cdrom->track[i].id = 0xAA;;
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} else {
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cdrom->track[i].id = hdr.th_starting_track + i;
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}
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cdrom->track[i].type =
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cdte[i].te_control & CDROM_DATA_TRACK;
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cdrom->track[i].offset =
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cdte[i].te_absaddr.lba.addr3 << 24 |
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cdte[i].te_absaddr.lba.addr2 << 16 |
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cdte[i].te_absaddr.lba.addr1 << 8 |
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cdte[i].te_absaddr.lba.addr0;
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cdrom->track[i].length = 0;
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if ( i > 0 ) {
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cdrom->track[i - 1].length =
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cdrom->track[i].offset -
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cdrom->track[i - 1].offset;
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}
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}
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#ifdef DEBUG_CDROM
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for (i = 0; i <= cdrom->numtracks; i++) {
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fprintf(stderr,"toc_entry[%d].te_track_number = %d\n",
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i,cdte[i].te_track_number);
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fprintf(stderr,"cdrom->track[%d].id = %d\n", i,cdrom->track[i].id);
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fprintf(stderr,"cdrom->track[%d].type = %x\n", i,cdrom->track[i].type);
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fprintf(stderr,"cdrom->track[%d].offset = %d\n", i,cdrom->track[i].offset);
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fprintf(stderr,"cdrom->track[%d].length = %d\n", i,cdrom->track[i].length);
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}
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#endif
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if ( i == (cdrom->numtracks+1) ) {
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okay = 1;
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}
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return(okay ? 0 : -1);
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}
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/* Get CD-ROM status */
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static CDstatus SDL_SYS_CDStatus(SDL_CD *cdrom, int *position)
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{
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CDstatus status;
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struct cd_sub_channel sc;
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struct cd_subc_channel_data scd;
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sc.sch_address_format = CDROM_LBA_FORMAT;
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sc.sch_data_format = CDROM_CURRENT_POSITION;
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sc.sch_track_number = 0;
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sc.sch_alloc_length = sizeof(scd);
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sc.sch_buffer = (caddr_t)&scd;
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if ( ioctl(cdrom->id, CDROM_READ_SUBCHANNEL, &sc) ) {
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status = CD_ERROR;
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fprintf(stderr,"ioctl error CDROM_READ_SUBCHANNEL \n");
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} else {
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switch (scd.scd_header.sh_audio_status) {
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case AS_AUDIO_INVALID:
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status = CD_STOPPED;
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break;
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case AS_PLAY_IN_PROGRESS:
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status = CD_PLAYING;
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break;
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case AS_PLAY_PAUSED:
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status = CD_PAUSED;
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break;
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case AS_PLAY_COMPLETED:
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status = CD_STOPPED;
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break;
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|
case AS_PLAY_ERROR:
|
||
|
|
status = CD_ERROR;
|
||
|
|
break;
|
||
|
|
case AS_NO_STATUS:
|
||
|
|
status = CD_STOPPED;
|
||
|
|
break;
|
||
|
|
default:
|
||
|
|
status = CD_ERROR;
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
#ifdef DEBUG_CDROM
|
||
|
|
fprintf(stderr,"scd.scd_header.sh_audio_status = %x\n",
|
||
|
|
scd.scd_header.sh_audio_status);
|
||
|
|
#endif
|
||
|
|
}
|
||
|
|
if (position) {
|
||
|
|
if (status == CD_PLAYING || (status == CD_PAUSED) ) {
|
||
|
|
*position =
|
||
|
|
scd.scd_position_data.scp_absaddr.lba.addr3 << 24 |
|
||
|
|
scd.scd_position_data.scp_absaddr.lba.addr2 << 16 |
|
||
|
|
scd.scd_position_data.scp_absaddr.lba.addr1 << 8 |
|
||
|
|
scd.scd_position_data.scp_absaddr.lba.addr0;
|
||
|
|
} else {
|
||
|
|
*position = 0;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
return status;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Start play */
|
||
|
|
static int SDL_SYS_CDPlay(SDL_CD *cdrom, int start, int length)
|
||
|
|
{
|
||
|
|
/* Play MSF
|
||
|
|
*
|
||
|
|
*/
|
||
|
|
struct cd_play_audio_msf msf;
|
||
|
|
int end;
|
||
|
|
|
||
|
|
bzero(&msf, sizeof(msf));
|
||
|
|
end = start +length;
|
||
|
|
FRAMES_TO_MSF(start,
|
||
|
|
&msf.msf_starting_M_unit,
|
||
|
|
&msf.msf_starting_S_unit,
|
||
|
|
&msf.msf_starting_F_unit);
|
||
|
|
FRAMES_TO_MSF(end,
|
||
|
|
&msf.msf_ending_M_unit,
|
||
|
|
&msf.msf_ending_S_unit,
|
||
|
|
&msf.msf_ending_F_unit);
|
||
|
|
|
||
|
|
return(ioctl(cdrom->id, CDROM_PLAY_AUDIO_MSF, &msf));
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Pause play */
|
||
|
|
static int SDL_SYS_CDPause(SDL_CD *cdrom)
|
||
|
|
{
|
||
|
|
return(ioctl(cdrom->id, CDROM_PAUSE_PLAY));
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Resume play */
|
||
|
|
static int SDL_SYS_CDResume(SDL_CD *cdrom)
|
||
|
|
{
|
||
|
|
return(ioctl(cdrom->id, CDROM_RESUME_PLAY));
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Stop play */
|
||
|
|
static int SDL_SYS_CDStop(SDL_CD *cdrom)
|
||
|
|
{
|
||
|
|
return(ioctl(cdrom->id, SCSI_STOP_UNIT));
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Eject the CD-ROM */
|
||
|
|
static int SDL_SYS_CDEject(SDL_CD *cdrom)
|
||
|
|
{
|
||
|
|
return(ioctl(cdrom->id, CDROM_EJECT_CADDY));
|
||
|
|
}
|
||
|
|
|
||
|
|
/* 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 ) {
|
||
|
|
free(SDL_cdlist[i]);
|
||
|
|
}
|
||
|
|
SDL_numcds = 0;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
|