Add support for reading musepack(mpc)-files and parsing APE-tags(v1 and v2).

Bumb version to have something to check for in JuK and kfile_mpc git-svn-id: svn://anonsvn.kde.org/home/kde/trunk/kdesupport/taglib@330294 283d02a7-25f6-0310-bc7c-ecb5cbfe19da
2025-07-18 21:14:23 -04:00 · 2004-07-17 13:39:27 +00:00
parent 425d793752
commit cda53a3db4
10 changed files with 1057 additions and 4 deletions
--- a/mpc/mpcproperties.cpp
+++ b/mpc/mpcproperties.cpp
@ -0,0 +1,137 @@
+/***************************************************************************
+    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                                                                   *
+ ***************************************************************************/
+
+#include <tstring.h>
+#include <tdebug.h>
+#include <bitset>
+
+#include "mpcproperties.h"
+#include "mpcfile.h"
+
+using namespace TagLib;
+
+class MPC::Properties::PropertiesPrivate
+{
+public:
+  PropertiesPrivate(ByteVector d, long st, ReadStyle s) :
+    data(d),
+    streamLength(st),
+    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(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::sampleWidth() const
+{
+  return d->sampleWidth;
+}*/
+
+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.mid(0,3) != "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(true);
+    d->sampleRate = sftable[flags[17]*2+flags[16]];
+    d->channels = 2;
+
+  } else {
+    unsigned int 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(4,2).toUInt(false);
+  }
+
+  unsigned int samples = frames * 1152 - 576;
+  d->length = (samples+(d->sampleRate/2)) / d->sampleRate;
+
+  if (!d->bitrate)
+      d->bitrate = ((d->streamLength*8L) / d->length)/1000;
+
+}