/* $Id: sector.c,v 1.3 2005/01/01 02:43:57 rockyb Exp $ Copyright (C) 2000 Herbert Valerio Riedel 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 #include #include #include "cdio_assert.h" #include #ifdef HAVE_STRING_H #include #endif #include 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: */