1 files changed, 141 insertions, 0 deletions
diff --git a/src/metadata/wavpack/wvproperties.cpp b/src/metadata/wavpack/wvproperties.cpp
new file mode 100644
index 0000000..376824d
--- /dev/null
+++ b/src/metadata/wavpack/wvproperties.cpp
@@ -0,0 +1,141 @@
+/***************************************************************************
+    copyright            : (C) 2006 by Lukáš Lalinský
+    email                : lalinsky@gmail.com
+    
+    copyright            : (C) 2004 by Allan Sandfeld Jensen 
+    email                : kde@carewolf.org 
+                           (original MPC implementation)
+ ***************************************************************************/
+
+/***************************************************************************
+ *   This library is free software; you can redistribute it and/or modify  *
+ *   it  under the terms of the GNU Lesser General Public License version  *
+ *   2.1 as published by the Free Software Foundation.                     *
+ *                                                                         *
+ *   This library 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     *
+ *   Lesser General Public License for more details.                       *
+ *                                                                         *
+ *   You should have received a copy of the GNU Lesser General Public      *
+ *   License along with this library; if not, write to the Free Software   *
+ *   Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,            *
+ *   MA  02110-1301  USA                                                   *
+ ***************************************************************************/
+
+#include <tstring.h>
+#if 0
+#include <tdebug.h>
+#endif
+#include <bitset>
+
+#include "wvproperties.h"
+#include "wvfile.h"
+
+using namespace TagLib;
+
+class WavPack::Properties::PropertiesPrivate
+{
+public:
+  PropertiesPrivate(const ByteVector &d, long length, ReadStyle s) :
+    data(d),
+    streamLength(length), 
+    style(s),
+    length(0),
+    bitrate(0),
+    sampleRate(0),
+    channels(0),
+    version(0),
+    bitsPerSample(0) {}
+
+  ByteVector data;
+  long streamLength; 
+  ReadStyle style;
+  int length;
+  int bitrate;
+  int sampleRate;
+  int channels;
+  int version;
+  int bitsPerSample;
+};
+
+////////////////////////////////////////////////////////////////////////////////
+// public members
+////////////////////////////////////////////////////////////////////////////////
+
+WavPack::Properties::Properties(const ByteVector &data, long streamLength, ReadStyle style) : AudioProperties(style)
+{
+  d = new PropertiesPrivate(data, streamLength, style);
+  read();
+}
+
+WavPack::Properties::~Properties()
+{
+  delete d;
+}
+
+int WavPack::Properties::length() const
+{
+  return d->length;
+}
+
+int WavPack::Properties::bitrate() const
+{
+  return d->bitrate;
+}
+
+int WavPack::Properties::sampleRate() const
+{
+  return d->sampleRate;
+}
+
+int WavPack::Properties::channels() const
+{
+  return d->channels;
+}
+
+int WavPack::Properties::version() const
+{
+  return d->version;
+}
+
+int WavPack::Properties::bitsPerSample() const
+{
+  return d->bitsPerSample;
+}
+
+////////////////////////////////////////////////////////////////////////////////
+// private members
+////////////////////////////////////////////////////////////////////////////////
+
+static const unsigned int sample_rates[] = { 6000, 8000, 9600, 11025, 12000,
+    16000, 22050, 24000, 32000, 44100, 48000, 64000, 88200, 96000, 192000 };
+
+#define BYTES_STORED    3
+#define MONO_FLAG       4
+    
+#define SHIFT_LSB       13
+#define SHIFT_MASK      (0x1fL << SHIFT_LSB)
+
+#define SRATE_LSB       23
+#define SRATE_MASK      (0xfL << SRATE_LSB)
+    
+void WavPack::Properties::read()
+{
+  if(!d->data.startsWith("wvpk"))
+    return;
+
+  d->version = d->data.mid(8, 2).toShort(false);
+  
+  unsigned int flags = d->data.mid(24, 4).toUInt(false);
+  d->bitsPerSample = ((flags & BYTES_STORED) + 1) * 8 -
+    ((flags & SHIFT_MASK) >> SHIFT_LSB);
+  d->sampleRate = sample_rates[(flags & SRATE_MASK) >> SRATE_LSB];
+  d->channels = (flags & MONO_FLAG) ? 1 : 2;
+  
+  unsigned int samples = d->data.mid(12, 4).toUInt(false);
+  d->length = d->sampleRate > 0 ? (samples + (d->sampleRate / 2)) / d->sampleRate : 0;
+  
+  d->bitrate = d->length > 0 ? ((d->streamLength * 8L) / d->length) / 1000 : 0;
+}
+