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-rw-r--r--contrib/libcdio/sector.c289
1 files changed, 289 insertions, 0 deletions
diff --git a/contrib/libcdio/sector.c b/contrib/libcdio/sector.c
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--- /dev/null
+++ b/contrib/libcdio/sector.c
@@ -0,0 +1,289 @@
+/*
+ $Id: sector.c,v 1.3 2005/01/01 02:43:57 rockyb Exp $
+
+ Copyright (C) 2000 Herbert Valerio Riedel <hvr@gnu.org>
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 2 of the License, or
+ (at your option) any later version.
+
+ This program 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 General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to the Free Software
+ Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+*/
+
+#ifdef HAVE_CONFIG_H
+# include "config.h"
+#endif
+
+#include <cdio/sector.h>
+#include <cdio/util.h>
+#include <cdio/logging.h>
+#include "cdio_assert.h"
+
+#include <stdio.h>
+#ifdef HAVE_STRING_H
+#include <string.h>
+#endif
+
+#include <ctype.h>
+
+static const char _rcsid[] = "$Id: sector.c,v 1.3 2005/01/01 02:43:57 rockyb Exp $";
+
+lba_t
+cdio_lba_to_lsn (lba_t lba)
+{
+ if (CDIO_INVALID_LBA == lba) return CDIO_INVALID_LSN;
+ return lba - CDIO_PREGAP_SECTORS;
+}
+
+/*
+ The below is adapted from cdparanoia code which claims it is
+ straight from the MMC3 spec.
+*/
+
+void
+cdio_lsn_to_msf (lsn_t lsn, msf_t *msf)
+{
+ int m, s, f;
+
+ cdio_assert (msf != 0);
+
+ if ( lsn >= -CDIO_PREGAP_SECTORS ){
+ m = (lsn + CDIO_PREGAP_SECTORS) / CDIO_CD_FRAMES_PER_MIN;
+ lsn -= m * CDIO_CD_FRAMES_PER_MIN;
+ s = (lsn + CDIO_PREGAP_SECTORS) / CDIO_CD_FRAMES_PER_SEC;
+ lsn -= s * CDIO_CD_FRAMES_PER_SEC;
+ f = lsn + CDIO_PREGAP_SECTORS;
+ } else {
+ m = (lsn + CDIO_CD_MAX_LSN) / CDIO_CD_FRAMES_PER_MIN;
+ lsn -= m * (CDIO_CD_FRAMES_PER_MIN);
+ s = (lsn+CDIO_CD_MAX_LSN) / CDIO_CD_FRAMES_PER_SEC;
+ lsn -= s * CDIO_CD_FRAMES_PER_SEC;
+ f = lsn + CDIO_CD_MAX_LSN;
+ }
+
+ if (m > 99) {
+ cdio_warn ("number of minutes (%d) truncated to 99.", m);
+ m = 99;
+ }
+
+ msf->m = cdio_to_bcd8 (m);
+ msf->s = cdio_to_bcd8 (s);
+ msf->f = cdio_to_bcd8 (f);
+}
+
+/*!
+ Convert an LBA into a string representation of the MSF.
+ \warning cdio_lba_to_msf_str returns new allocated string */
+char *
+cdio_lba_to_msf_str (lba_t lba)
+{
+
+ if (CDIO_INVALID_LBA == lba) {
+ return strdup("*INVALID");
+ } else {
+ msf_t msf;
+ msf.m = msf.s = msf.f = 0;
+ cdio_lba_to_msf (lba, &msf);
+ return cdio_msf_to_str(&msf);
+ }
+}
+
+/*!
+ Convert an LSN into the corresponding LBA.
+ CDIO_INVALID_LBA is returned if there is an error.
+*/
+lba_t
+cdio_lsn_to_lba (lsn_t lsn)
+{
+ if (CDIO_INVALID_LSN == lsn) return CDIO_INVALID_LBA;
+ return lsn + CDIO_PREGAP_SECTORS;
+}
+
+/*!
+ Convert an LBA into the corresponding MSF.
+*/
+void
+cdio_lba_to_msf (lba_t lba, msf_t *msf)
+{
+ cdio_assert (msf != 0);
+ cdio_lsn_to_msf(cdio_lba_to_lsn(lba), msf);
+}
+
+/*!
+ Convert a MSF into the corresponding LBA.
+ CDIO_INVALID_LBA is returned if there is an error.
+*/
+lba_t
+cdio_msf_to_lba (const msf_t *msf)
+{
+ uint32_t lba = 0;
+
+ cdio_assert (msf != 0);
+
+ lba = cdio_from_bcd8 (msf->m);
+ lba *= CDIO_CD_SECS_PER_MIN;
+
+ lba += cdio_from_bcd8 (msf->s);
+ lba *= CDIO_CD_FRAMES_PER_SEC;
+
+ lba += cdio_from_bcd8 (msf->f);
+
+ return lba;
+}
+
+/*!
+ Convert a MSF into the corresponding LSN.
+ CDIO_INVALID_LSN is returned if there is an error.
+*/
+lba_t
+cdio_msf_to_lsn (const msf_t *msf)
+{
+ return cdio_lba_to_lsn(cdio_msf_to_lba (msf));
+}
+
+/*!
+ Convert an LBA into a string representation of the MSF.
+ \warning cdio_lba_to_msf_str returns new allocated string */
+char *
+cdio_msf_to_str (const msf_t *msf)
+{
+ char buf[16];
+
+ snprintf (buf, sizeof (buf), "%2.2x:%2.2x:%2.2x", msf->m, msf->s, msf->f);
+ return strdup (buf);
+}
+
+/*!
+ Convert a MSF - broken out as 3 integer components into the
+ corresponding LBA.
+ CDIO_INVALID_LBA is returned if there is an error.
+*/
+lba_t
+cdio_msf3_to_lba (unsigned int minutes, unsigned int seconds,
+ unsigned int frames)
+{
+ return ((minutes * CDIO_CD_SECS_PER_MIN + seconds) * CDIO_CD_FRAMES_PER_SEC
+ + frames);
+}
+
+/*!
+ Convert a string of the form MM:SS:FF into the corresponding LBA.
+ CDIO_INVALID_LBA is returned if there is an error.
+*/
+lba_t
+cdio_mmssff_to_lba (const char *psz_mmssff)
+{
+ int psz_field;
+ lba_t ret;
+ char c;
+
+ if (0 == strcmp (psz_mmssff, "0"))
+ return 0;
+
+ c = *psz_mmssff++;
+ if(c >= '0' && c <= '9')
+ psz_field = (c - '0');
+ else
+ return CDIO_INVALID_LBA;
+ while(':' != (c = *psz_mmssff++)) {
+ if(c >= '0' && c <= '9')
+ psz_field = psz_field * 10 + (c - '0');
+ else
+ return CDIO_INVALID_LBA;
+ }
+
+ ret = cdio_msf3_to_lba (psz_field, 0, 0);
+
+ c = *psz_mmssff++;
+ if(c >= '0' && c <= '9')
+ psz_field = (c - '0');
+ else
+ return CDIO_INVALID_LBA;
+ if(':' != (c = *psz_mmssff++)) {
+ if(c >= '0' && c <= '9') {
+ psz_field = psz_field * 10 + (c - '0');
+ c = *psz_mmssff++;
+ if(c != ':')
+ return CDIO_INVALID_LBA;
+ }
+ else
+ return CDIO_INVALID_LBA;
+ }
+
+ if(psz_field >= CDIO_CD_SECS_PER_MIN)
+ return CDIO_INVALID_LBA;
+
+ ret += cdio_msf3_to_lba (0, psz_field, 0);
+
+ c = *psz_mmssff++;
+ if (isdigit(c))
+ psz_field = (c - '0');
+ else
+ return -1;
+ if('\0' != (c = *psz_mmssff++)) {
+ if (isdigit(c)) {
+ psz_field = psz_field * 10 + (c - '0');
+ c = *psz_mmssff++;
+ }
+ else
+ return CDIO_INVALID_LBA;
+ }
+
+ if('\0' != c)
+ return CDIO_INVALID_LBA;
+
+ if(psz_field >= CDIO_CD_FRAMES_PER_SEC)
+ return CDIO_INVALID_LBA;
+
+ ret += psz_field;
+
+ return ret;
+}
+
+bool
+cdio_is_discmode_cdrom(discmode_t discmode)
+{
+ switch (discmode) {
+ case CDIO_DISC_MODE_CD_DA:
+ case CDIO_DISC_MODE_CD_DATA:
+ case CDIO_DISC_MODE_CD_XA:
+ case CDIO_DISC_MODE_CD_MIXED:
+ case CDIO_DISC_MODE_NO_INFO:
+ return true;
+ default:
+ return false;
+ }
+}
+
+bool
+cdio_is_discmode_dvd(discmode_t discmode)
+{
+ switch (discmode) {
+ case CDIO_DISC_MODE_DVD_ROM:
+ case CDIO_DISC_MODE_DVD_RAM:
+ case CDIO_DISC_MODE_DVD_R:
+ case CDIO_DISC_MODE_DVD_RW:
+ case CDIO_DISC_MODE_DVD_PR:
+ case CDIO_DISC_MODE_DVD_PRW:
+ return true;
+ default:
+ return false;
+ }
+}
+
+
+/*
+ * Local variables:
+ * c-file-style: "gnu"
+ * tab-width: 8
+ * indent-tabs-mode: nil
+ * End:
+ */
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