1 files changed, 140 insertions, 0 deletions
diff --git a/libs/taglib/taglib/mpc/mpcproperties.cpp b/libs/taglib/taglib/mpc/mpcproperties.cpp
new file mode 100644
index 0000000000..2114a86495
--- /dev/null
+++ b/libs/taglib/taglib/mpc/mpcproperties.cpp
@@ -0,0 +1,140 @@
+/***************************************************************************
+    copyright            : (C) 2004 by Allan Sandfeld Jensen
+    email                : kde@carewolf.org
+ ***************************************************************************/
+
+/***************************************************************************
+ *   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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  *
+ *   USA                                                                   *
+ *                                                                         *
+ *   Alternatively, this file is available under the Mozilla Public        *
+ *   License Version 1.1.  You may obtain a copy of the License at         *
+ *   http://www.mozilla.org/MPL/                                           *
+ ***************************************************************************/
+
+#include <tstring.h>
+#include <tdebug.h>
+#include <bitset>
+
+#include "mpcproperties.h"
+#include "mpcfile.h"
+
+using namespace TagLib;
+
+class MPC::Properties::PropertiesPrivate
+{
+public:
+  PropertiesPrivate(const ByteVector &d, long length, ReadStyle s) :
+    data(d),
+    streamLength(length),
+    style(s),
+    version(0),
+    length(0),
+    bitrate(0),
+    sampleRate(0),
+    channels(0) {}
+
+  ByteVector data;
+  long streamLength;
+  ReadStyle style;
+  int version;
+  int length;
+  int bitrate;
+  int sampleRate;
+  int channels;
+};
+
+////////////////////////////////////////////////////////////////////////////////
+// public members
+////////////////////////////////////////////////////////////////////////////////
+
+MPC::Properties::Properties(const ByteVector &data, long streamLength, ReadStyle style) : AudioProperties(style)
+{
+  d = new PropertiesPrivate(data, streamLength, style);
+  read();
+}
+
+MPC::Properties::~Properties()
+{
+  delete d;
+}
+
+int MPC::Properties::length() const
+{
+  return d->length;
+}
+
+int MPC::Properties::bitrate() const
+{
+  return d->bitrate;
+}
+
+int MPC::Properties::sampleRate() const
+{
+  return d->sampleRate;
+}
+
+int MPC::Properties::channels() const
+{
+  return d->channels;
+}
+
+int MPC::Properties::mpcVersion() const
+{
+  return d->version;
+}
+
+////////////////////////////////////////////////////////////////////////////////
+// private members
+////////////////////////////////////////////////////////////////////////////////
+
+static const unsigned short sftable [4] = { 44100, 48000, 37800, 32000 };
+
+void MPC::Properties::read()
+{
+  if(!d->data.startsWith("MP+"))
+    return;
+
+  d->version = d->data[3] & 15;
+
+  unsigned int frames;
+
+  if(d->version >= 7) {
+    frames = d->data.mid(4, 4).toUInt(false);
+
+    std::bitset<32> flags = d->data.mid(8, 4).toUInt(false);
+    d->sampleRate = sftable[flags[17] * 2 + flags[16]];
+    d->channels = 2;
+  }
+  else {
+    uint headerData = d->data.mid(0, 4).toUInt(false);
+
+    d->bitrate = (headerData >> 23) & 0x01ff;
+    d->version = (headerData >> 11) & 0x03ff;
+    d->sampleRate = 44100;
+    d->channels = 2;
+
+    if(d->version >= 5)
+      frames = d->data.mid(4, 4).toUInt(false);
+    else
+      frames = d->data.mid(6, 2).toUInt(false);
+  }
+
+  uint samples = frames * 1152 - 576;
+
+  d->length = d->sampleRate > 0 ? (samples + (d->sampleRate / 2)) / d->sampleRate : 0;
+
+  if(!d->bitrate)
+    d->bitrate = d->length > 0 ? ((d->streamLength * 8L) / d->length) / 1000 : 0;
+}