09cd73f1b5
--HG-- extra : convert_revision : svn%3Ac70aab31-4412-0410-b14c-859654838e24/trunk%401342
455 lines
12 KiB
C
455 lines
12 KiB
C
/*
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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 <dirent.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 "SDL_stdlib.h"
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#include "SDL_string.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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/* 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 cdfd, is_cd = 0;
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struct mode_sel_sns_params msp;
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struct inquiry_info inq;
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#ifdef DEBUG_CDROM
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char *devtype[] = {"Disk", "Tape", "Printer", "Processor", "WORM",
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"CD-ROM", "Scanner", "Optical", "Changer", "Comm", "Unknown"};
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#endif
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bzero(&msp, sizeof(msp));
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bzero(&inq, sizeof(inq));
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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 ( (cdfd = open(drive, (O_RDWR|O_NDELAY), 0)) >= 0 ) {
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msp.msp_addr = (caddr_t) &inq;
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msp.msp_pgcode = 0;
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msp.msp_pgctrl = 0;
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msp.msp_length = sizeof(inq);
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msp.msp_setps = 0;
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if ( ioctl(cdfd, SCSI_GET_INQUIRY_DATA, &msp) )
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return (0);
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#ifdef DEBUG_CDROM
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fprintf(stderr, "Device Type: %s\n", devtype[inq.perfdt]);
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fprintf(stderr, "Vendor: %.8s\n", inq.vndrid);
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fprintf(stderr, "Product: %.8s\n", inq.prodid);
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fprintf(stderr, "Revision: %.8s\n", inq.revlvl);
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#endif
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if ( inq.perfdt == DTYPE_RODIRECT )
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is_cd = 1;
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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 *)SDL_malloc(SDL_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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SDL_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:
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*
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* Tru64 5.X (/dev/rdisk/cdrom?c)
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* dir: /dev/rdisk, name: cdrom
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*
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* Digital UNIX 4.0X (/dev/rrz?c)
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* dir: /dev, name: rrz
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*
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*/
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struct {
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char *dir;
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char *name;
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} checklist[] = {
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{"/dev/rdisk", "cdrom"},
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{"/dev", "rrz"},
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{NULL, 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 = SDL_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 = SDL_malloc(SDL_strlen(SDLcdrom)+1);
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if ( cdpath != NULL ) {
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SDL_strcpy(cdpath, SDLcdrom);
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SDLcdrom = cdpath;
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do {
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delim = SDL_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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SDL_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].dir; ++i) {
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DIR *devdir;
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struct dirent *devent;
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int name_len;
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devdir = opendir(checklist[i].dir);
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if (devdir) {
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name_len = SDL_strlen(checklist[i].name);
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while (devent = readdir(devdir))
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if (SDL_memcmp(checklist[i].name, devent->d_name, name_len) == 0)
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if (devent->d_name[devent->d_namlen-1] == 'c') {
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SDL_snprintf(drive, SDL_arraysize(drive), "%s/%s", checklist[i].dir, devent->d_name);
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#ifdef DEBUG_CDROM
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fprintf(stderr, "Try to add drive: %s\n", drive);
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#endif
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if ( CheckDrive(drive, &stbuf) > 0 )
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AddDrive(drive, &stbuf);
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}
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closedir(devdir);
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} else {
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#ifdef DEBUG_CDROM
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fprintf(stderr, "cannot open dir: %s\n", checklist[i].dir);
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#endif
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}
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}
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/*
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SDLcdrom=SDL_malloc(sizeof(char) * 32);
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SDL_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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cdte =(struct cd_toc_entry *) ((char *) 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:
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status = CD_ERROR;
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break;
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case AS_NO_STATUS:
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status = CD_STOPPED;
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break;
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default:
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status = CD_ERROR;
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break;
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}
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#ifdef DEBUG_CDROM
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fprintf(stderr,"scd.scd_header.sh_audio_status = %x\n",
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scd.scd_header.sh_audio_status);
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#endif
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}
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if (position) {
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if (status == CD_PLAYING || (status == CD_PAUSED) ) {
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*position =
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scd.scd_position_data.scp_absaddr.lba.addr3 << 24 |
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scd.scd_position_data.scp_absaddr.lba.addr2 << 16 |
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scd.scd_position_data.scp_absaddr.lba.addr1 << 8 |
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scd.scd_position_data.scp_absaddr.lba.addr0;
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} else {
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*position = 0;
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}
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}
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return status;
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}
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/* Start play */
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static int SDL_SYS_CDPlay(SDL_CD *cdrom, int start, int length)
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{
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/*
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* Play MSF
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*/
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struct cd_play_audio_msf msf;
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int end;
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bzero(&msf, sizeof(msf));
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end = start +length;
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FRAMES_TO_MSF(start + 150, /* LBA = 4500*M + 75*S + F - 150 */
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&msf.msf_starting_M_unit,
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&msf.msf_starting_S_unit,
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&msf.msf_starting_F_unit);
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FRAMES_TO_MSF(end + 150, /* LBA = 4500*M + 75*S + F - 150 */
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&msf.msf_ending_M_unit,
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&msf.msf_ending_S_unit,
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&msf.msf_ending_F_unit);
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return(ioctl(cdrom->id, CDROM_PLAY_AUDIO_MSF, &msf));
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}
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/* Pause play */
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static int SDL_SYS_CDPause(SDL_CD *cdrom)
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{
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return(ioctl(cdrom->id, CDROM_PAUSE_PLAY));
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}
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/* Resume play */
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static int SDL_SYS_CDResume(SDL_CD *cdrom)
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{
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return(ioctl(cdrom->id, CDROM_RESUME_PLAY));
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}
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/* Stop play */
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static int SDL_SYS_CDStop(SDL_CD *cdrom)
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{
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return(ioctl(cdrom->id, SCSI_STOP_UNIT));
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}
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/* Eject the CD-ROM */
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static int SDL_SYS_CDEject(SDL_CD *cdrom)
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{
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return(ioctl(cdrom->id, CDROM_EJECT_CADDY));
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}
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/* Close the CD-ROM handle */
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static void SDL_SYS_CDClose(SDL_CD *cdrom)
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{
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close(cdrom->id);
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}
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void SDL_SYS_CDQuit(void)
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{
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int i;
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if ( SDL_numcds > 0 ) {
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for ( i=0; i<SDL_numcds; ++i ) {
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SDL_free(SDL_cdlist[i]);
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}
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SDL_numcds = 0;
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}
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}
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