--- /dev/null
+/*
+ * This file is part of DisOrder.
+ * Copyright (C) 2004, 2005, 2007 Richard Kettlewell
+ *
+ * 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/>.
+ */
+/** @file plugins/tracklength-mp3.c
+ * @brief Compute track lengths for MP3 files
+ */
+#include "tracklength.h"
+#include <mad.h>
+#include "madshim.h"
+
+static void *mmap_file(const char *path, size_t *lengthp) {
+ int fd;
+ void *base;
+ struct stat sb;
+
+ if((fd = open(path, O_RDONLY)) < 0) {
+ disorder_error(errno, "error opening %s", path);
+ return 0;
+ }
+ if(fstat(fd, &sb) < 0) {
+ disorder_error(errno, "error calling stat on %s", path);
+ goto error;
+ }
+ if(sb.st_size == 0) /* can't map 0-length files */
+ goto error;
+ if((base = mmap(0, sb.st_size, PROT_READ,
+ MAP_SHARED, fd, 0)) == (void *)-1) {
+ disorder_error(errno, "error calling mmap on %s", path);
+ goto error;
+ }
+ *lengthp = sb.st_size;
+ close(fd);
+ return base;
+error:
+ close(fd);
+ return 0;
+}
+
+long tl_mp3(const char *path) {
+ size_t length;
+ void *base;
+ buffer b;
+
+ if(!(base = mmap_file(path, &length))) return -1;
+ b.duration = mad_timer_zero;
+ scan_mp3(base, length, &b);
+ munmap(base, length);
+ return b.duration.seconds + !!b.duration.fraction;
+}
+
+/*
+Local Variables:
+c-basic-offset:2
+comment-column:40
+fill-column:79
+End:
+*/