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

2011-11-05 01:03:27 -04:00
parent 6454d9efe1
commit c0315f0d80
5 changed files with 95 additions and 1 deletions
--- a/example/discid.c
+++ b/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;
+}