Added TagLib (with AUTORS and COPYING files)

[someplayer] / src / taglib / flac / flacproperties.cpp

diff --git a/src/taglib/flac/flacproperties.cpp b/src/taglib/flac/flacproperties.cpp
new file mode 100644 (file)
index 0000000..f137059
--- /dev/null
+++ b/src/taglib/flac/flacproperties.cpp
@@ -0,0 +1,150 @@
+/***************************************************************************
+    copyright            : (C) 2003 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 "flacproperties.h"
+#include "flacfile.h"
+
+using namespace TagLib;
+
+class FLAC::Properties::PropertiesPrivate
+{
+public:
+  PropertiesPrivate(ByteVector d, long st, ReadStyle s) :
+    data(d),
+    streamLength(st),
+    style(s),
+    length(0),
+    bitrate(0),
+    sampleRate(0),
+    sampleWidth(0),
+    channels(0) {}
+
+  ByteVector data;
+  long streamLength;
+  ReadStyle style;
+  int length;
+  int bitrate;
+  int sampleRate;
+  int sampleWidth;
+  int channels;
+};
+
+////////////////////////////////////////////////////////////////////////////////
+// public members
+////////////////////////////////////////////////////////////////////////////////
+
+FLAC::Properties::Properties(ByteVector data, long streamLength, ReadStyle style) : AudioProperties(style)
+{
+  d = new PropertiesPrivate(data, streamLength, style);
+  read();
+}
+
+FLAC::Properties::Properties(File *file, ReadStyle style) : AudioProperties(style)
+{
+  d = new PropertiesPrivate(file->streamInfoData(), file->streamLength(), style);
+  read();
+}
+
+FLAC::Properties::~Properties()
+{
+  delete d;
+}
+
+int FLAC::Properties::length() const
+{
+  return d->length;
+}
+
+int FLAC::Properties::bitrate() const
+{
+  return d->bitrate;
+}
+
+int FLAC::Properties::sampleRate() const
+{
+  return d->sampleRate;
+}
+
+int FLAC::Properties::sampleWidth() const
+{
+  return d->sampleWidth;
+}
+
+int FLAC::Properties::channels() const
+{
+  return d->channels;
+}
+
+////////////////////////////////////////////////////////////////////////////////
+// private members
+////////////////////////////////////////////////////////////////////////////////
+
+void FLAC::Properties::read()
+{
+  if(d->data.size() < 18) {
+    debug("FLAC::Properties::read() - FLAC properties must contain at least 18 bytes.");
+    return;
+  }
+
+  int pos = 0;
+
+  // Minimum block size (in samples)
+  pos += 2;
+
+  // Maximum block size (in samples)
+  pos += 2;
+
+  // Minimum frame size (in bytes)
+  pos += 3;
+
+  // Maximum frame size (in bytes)
+  pos += 3;
+
+  uint flags = d->data.mid(pos, 4).toUInt(true);
+  d->sampleRate = flags >> 12;
+  d->channels = ((flags >> 9) & 7) + 1;
+  d->sampleWidth = ((flags >> 4) & 31) + 1;
+
+  // The last 4 bits are the most significant 4 bits for the 36 bit
+  // stream length in samples. (Audio files measured in days)
+
+  uint highLength =d->sampleRate > 0 ? (((flags & 0xf) << 28) / d->sampleRate) << 4 : 0;
+  pos += 4;
+
+  d->length = d->sampleRate > 0 ?
+      (d->data.mid(pos, 4).toUInt(true)) / d->sampleRate + highLength : 0;
+  pos += 4;
+
+  // Uncompressed bitrate:
+
+  //d->bitrate = ((d->sampleRate * d->channels) / 1000) * d->sampleWidth;
+
+  // Real bitrate:
+
+  d->bitrate = d->length > 0 ? ((d->streamLength * 8UL) / d->length) / 1000 : 0;
+}