X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~mdw/git/disorder/blobdiff_plain/2f5322348cd909291084a0499218b58c2ce74ce7..28e9141a9e7e4a30e6cd384ada7c87edab7d8efb:/plugins/tracklength-wav.c

diff --git a/plugins/tracklength-wav.c b/plugins/tracklength-wav.c
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+++ b/plugins/tracklength-wav.c
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+/*
+ * 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-wav.c
+ * @brief Compute track lengths for WAV files
+ */
+#include "tracklength.h"
+#include "wav.h"
+
+long tl_wav(const char *path) {
+  struct wavfile f[1];
+  int err, sample_frame_size;
+  long duration;
+
+  if((err = wav_init(f, path))) {
+    disorder_error(err, "error opening %s", path); 
+    return -1;
+  }
+  sample_frame_size = (f->bits + 7) / 8 * f->channels;
+  if(sample_frame_size) {
+    const long long n_samples = f->datasize / sample_frame_size;
+    duration = (n_samples + f->rate - 1) / f->rate;
+  } else
+    duration = -1;
+  wav_destroy(f);
+  return duration;
+}
+
+/*
+Local Variables:
+c-basic-offset:2
+comment-column:40
+fill-column:79
+End:
+*/