/* * $Id: plat_sun_cdda.c,v 1.3 1999/03/07 08:36:41 dirk Exp $ * * This file is part of WorkMan, the civilized CD player library * (c) 1991-1997 by Steven Grimm (original author) * (c) by Dirk Försterling (current 'author' = maintainer) * The maintainer can be contacted by his e-mail address: * milliByte@DeathsDoor.com * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Library General Public * License as published by the Free Software Foundation; either * version 2 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 * Library General Public License for more details. * * You should have received a copy of the GNU Library General Public * License along with this library; if not, write to the Free * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA * * * Sun (really Solaris) CDDA functions. */ #include "include/wm_config.h" #if defined(sun) && defined(SYSV) && defined(BUILD_CDDA) /* { */ static char plat_sun_cdda_id[] = "$Id: plat_sun_cdda.c,v 1.3 1999/03/07 08:36:41 dirk Exp $"; #include "include/wm_cdda.h" /* types.h and cdio.h are included by wmcdda.h */ #include #include #include #include #include #define WM_MSG_CLASS WM_MSG_CLASS_PLATFORM #define CDDABLKSIZE 2368 #define SAMPLES_PER_BLK 588 /* Address of next block to read. */ int current_position = 0; /* Address of first and last blocks to read. */ int starting_position = 0; int ending_position = 0; /* Playback direction. */ int direction = 1; /* Number of blocks to read at once; initialize to the maximum. */ /* (was 30. Set to 15 for INTeL. Maybe config option? */ int numblocks = 15; /* * This is the fastest way to convert from BCD to 8-bit. */ unsigned char unbcd[256] = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 0,0,0,0,0,0, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 0,0,0,0,0,0, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 0,0,0,0,0,0, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 0,0,0,0,0,0, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 0,0,0,0,0,0, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 0,0,0,0,0,0, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 0,0,0,0,0,0, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 0,0,0,0,0,0, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 0,0,0,0,0,0, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99, 0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0 }; /* * Initialize the CDDA data buffer and open the appropriate device. * * NOTE: We allocate twice as much space as we need to actually read a block; * this lets us do audio manipulations without bothering to malloc a second * buffer. * * Also, test to see if we can actually *do* CDDA on this drive; if not, we * need to exit right away so the UI doesn't show the user any CDDA controls. */ int wmcdda_init(char **bufadr, long *buflenadr, int init_fd, char *devname) { struct cdrom_cdda cdda; *bufadr = malloc(numblocks * CDDABLKSIZE * 2); if (*bufadr == NULL) return (-1); *buflenadr = numblocks * CDDABLKSIZE; /*init_fd = open(devname, 0); if (init_fd == -1) init_fd = open("/dev/rdsk/c0t6d0s2", 0); */ init_fd = wmcdda_open(devname); if (init_fd > -1) { cdda.cdda_addr = 200; cdda.cdda_length = 1; cdda.cdda_data = *bufadr; cdda.cdda_subcode = CDROM_DA_SUBQ; if (ioctl(init_fd, CDROMCDDA, &cdda) < 0) { close(init_fd); init_fd = -1; } } return (init_fd); } /* * Try to open the CD device */ int wmcdda_open(char *devname) { int fd; fd = open(devname, 0); if (fd == -1) fd = open("/dev/rdsk/c0t6d0s2", 0); return(fd); } /* * Close the CD-ROM device in preparation for exiting. */ void wmcdda_close(int fd) { close(fd); } /* * Set up for playing the CD. Actually this doesn't play a thing, just sets a * couple variables so we'll know what to do when we're called. */ void wmcdda_setup(int start, int end, int realstart) { current_position = start - 150; ending_position = end - 150; starting_position = realstart - 150; /* * Special case: don't start at the "end" of a track if we're * playing backwards! */ if (direction == -1 && start == realstart) current_position = ending_position - numblocks; } /* * Read some blocks from the CD. Stop if we hit the end of the current region. * * Returns number of bytes read, -1 on error, 0 if stopped for a benign reason. */ long wmcdda_read(int fd, unsigned char *rawbuf, long buflen, struct cdda_block *block) { struct cdrom_cdda cdda; int blk; unsigned char *q; extern int speed; if ((direction > 0 && current_position >= ending_position) || (direction < 0 && current_position < starting_position)) { block->status = WMCDDA_DONE; return (0); } cdda.cdda_addr = current_position; if (ending_position && current_position + numblocks > ending_position) cdda.cdda_length = ending_position - current_position; else cdda.cdda_length = numblocks; cdda.cdda_data = rawbuf; cdda.cdda_subcode = CDROM_DA_SUBQ; if (ioctl(fd, CDROMCDDA, &cdda) < 0) { if (errno == ENXIO) /* CD ejected! */ { block->status = WMCDDA_EJECTED; return (-1); } if (current_position + numblocks > ending_position) { /* * Hit the end of the CD, probably. */ block->status = WMCDDA_DONE; return (0); } /* Sometimes it fails once, dunno why */ if (ioctl(fd, CDROMCDDA, &cdda) < 0) { if (ioctl(fd, CDROMCDDA, &cdda) < 0) { if (ioctl(fd, CDROMCDDA, &cdda) < 0) { perror("CDROMCDDA"); block->status = WMCDDA_ERROR; return (-1); } } } } if (speed > 148) { /* * We want speed=148 to advance by cdda_length, but * speed=256 to advance cdda_length * 4. */ current_position = current_position + (cdda.cdda_length * direction * (speed - 112)) / 36; } else current_position = current_position + cdda.cdda_length * direction; for (blk = 0; blk < numblocks; blk++) { /* * New valid Q-subchannel information? Update the block * status. */ q = &rawbuf[blk * CDDABLKSIZE + SAMPLES_PER_BLK * 4]; if (*q == 1) { block->status = WMCDDA_OK; block->track = unbcd[q[1]]; block->index = unbcd[q[2]]; block->minute = unbcd[q[7]]; block->second = unbcd[q[8]]; block->frame = unbcd[q[9]]; } } return (cdda.cdda_length * CDDABLKSIZE); } /* * Normalize a bunch of CDDA data. Basically this means ripping out the * Q subchannel data and doing byte-swapping, since the CD audio is in * littleendian format. * * Scanning is handled here too. * * XXX - do byte swapping on Intel boxes? */ long wmcdda_normalize(unsigned char *rawbuf, long buflen, struct cdda_block *block) { int i, nextq; int blocks = buflen / CDDABLKSIZE; unsigned char *dest = rawbuf; unsigned char tmp; long *buf32 = (long *)rawbuf, tmp32; /* * this was #ifndef LITTLEENDIAN * in wmcdda it was called LITTLE_ENDIAN. Was this a flaw? */ #if WM_BIG_ENDIAN if (blocks--) for (i = 0; i < SAMPLES_PER_BLK * 2; i++) { /* Only need to use temp buffer on first block. */ tmp = *rawbuf++; *dest++ = *rawbuf++; *dest++ = tmp; } #endif while (blocks--) { /* Skip over Q data. */ rawbuf += 16; for (i = 0; i < SAMPLES_PER_BLK * 2; i++) { #if WM_LITTLE_ENDIAN *dest++ = *rawbuf++; *dest++ = *rawbuf++; #else *dest++ = rawbuf[1]; *dest++ = rawbuf[0]; rawbuf += 2; #endif } } buflen -= ((buflen / CDDABLKSIZE) * 16); /* * Reverse the data here if we're playing backwards. * XXX - ideally this should be done above. */ if (direction < 0) { buflen /= 4; /* we can move 32 bits at a time. */ for (i = 0; i < buflen / 2; i++) { tmp32 = buf32[i]; buf32[i] = buf32[buflen - i - 1]; buf32[buflen - i - 1] = tmp32; } buflen *= 4; } return (buflen); } /* * Set the playback direction. */ void wmcdda_direction(int newdir) { if (newdir == 0) { numblocks = 20; direction = 1; } else { numblocks = 30; direction = -1; } } /* * Do system-specific stuff to get ready to play at a particular speed. */ void wmcdda_speed(int speed) { if (speed > 128) numblocks = 12; else numblocks = direction > 0 ? 20 : 30; } #endif /* } */