discid (http://discid.sourceforge.net/) using libcdio.

example/.gitignore

@@ -11,6 +11,7 @@
 /cdio-eject
 /cdtext
 /device
+/discid
 /drives
 /eject
 /isofile

example/Makefile.am

@@ -25,7 +25,7 @@ if BUILD_CD_PARANOIA
 paranoia_progs = paranoia paranoia2
 endif
 if BUILD_EXAMPLES
-noinst_PROGRAMS = audio cdchange cdtext device drives eject \
+noinst_PROGRAMS = audio cdchange cdtext device discid drives eject \
 	          isofile isofile2 isofuzzy isolist isolsn \
 	          mmc1 mmc2 mmc2a mmc3 $(paranoia_progs) tracks \
 	          sample3 sample4 udf1 udffile cdio-eject
@@ -45,6 +45,9 @@ cdtext_LDADD          = $(LIBCDIO_LIBS) $(LTLIBICONV)
 device_DEPENDENCIES   = $(LIBCDIO_DEPS)
 device_LDADD          = $(LIBCDIO_LIBS) $(LTLIBICONV)
 
+discid_DEPENDENCIES   = $(LIBCDIO_DEPS)
+discid_LDADD          = $(LIBCDIO_LIBS) $(LTLIBICONV)
+
 drives_DEPENDENCIES   = $(LIBCDIO_DEPS)
 drives_LDADD          = $(LIBCDIO_LIBS) $(LTLIBICONV)
 

example/README

@@ -29,6 +29,12 @@ cdio-eject.c: a stripped-down "eject" command to open or close a CDROM
 
 cdtext.c:    A program to show CD-Text and CD disc mode info.
 
+discid.c:    http://sourceforge.net/projects/discid/ using libcdio:
+	     a small program to calculate the disc-ID for audio
+	     compact discs. The disc-ID can be used to query info
+	     (tracks, title, interpret) about compact audio discs from
+	     a CDDB-Server.
+
 drives.c:    A program to show drivers installed and what the default
 	     CD-ROM drive is and what CD drives are available.
 

example/discid.c

@@ -0,0 +1,83 @@
+/*
+  Copyright (C) 2011
+  Rocky Bernstein <rocky@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 3 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, see <http://www.gnu.org/licenses/>.
+*/
+
+/* http://sourceforge.net/projects/discid/ using libcdio:
+
+   a small program to calculate the disc-ID for audio compact
+   discs. The disc-ID can be used to query info (tracks, title,
+   interpret) about compact audio discs from a CDDB-Server.
+*/
+
+#include <stdio.h>
+#ifdef HAVE_SYS_TYPES_H
+#include <sys/types.h>
+#endif
+#include <cdio/cdio.h>
+
+static int cddb_sum(int n)
+{
+  int result = 0;
+  while (n > 0)
+  {
+    result += n % 10;
+    n /= 10;
+  }
+
+  return result;
+}
+
+int
+main(int argc, const char *argv[])
+{
+  CdIo_t *p_cdio = cdio_open (NULL, DRIVER_UNKNOWN);
+  track_t i_track;
+  track_t i_tracks;
+  unsigned n = 0;
+
+  if (NULL == p_cdio) {
+    printf("Couldn't find a driver.. leaving.\n");
+    return 1;
+  }
+  
+  i_tracks = cdio_get_num_tracks(p_cdio);
+  for (i_track = 1; i_track <= i_tracks; ++i_track) {
+      lba_t lba = cdio_get_track_lba(p_cdio, i_track);
+      n += cddb_sum(lba / CDIO_CD_FRAMES_PER_SEC);
+  }
+  { 
+      unsigned start_sec = 
+	  cdio_get_track_lba(p_cdio, 1) /  CDIO_CD_FRAMES_PER_SEC;
+      unsigned leadout_sec = 
+	  cdio_get_track_lba(p_cdio, CDIO_CDROM_LEADOUT_TRACK) 
+	  / CDIO_CD_FRAMES_PER_SEC;
+      unsigned total = leadout_sec - start_sec;
+      unsigned id = ((n % 0xff) << 24 | total << 8 | i_tracks);
+
+      printf("%08X %d", id, i_tracks);
+      for (i_track = 1; i_track <= i_tracks; ++i_track) {
+	  lba_t lba = cdio_get_track_lba(p_cdio, i_track);
+	  printf(" %ld", (long) lba);
+      }
+      printf(" %ld\n", (long) cdio_get_track_lba(p_cdio, 
+						 CDIO_CDROM_LEADOUT_TRACK)
+	     / CDIO_CD_FRAMES_PER_SEC);
+  }
+
+  cdio_destroy(p_cdio);
+  return 0;
+}

lib/.gitignore

@@ -1,2 +1,3 @@
+/*~
 /Makefile
 /Makefile.in