added opus plugin

git-svn-id: http://svn.code.sf.net/p/qmmp-dev/code/trunk/qmmp@3256 90c681e8-e032-0410-971d-27865f9a5e38

1 files changed, 161 insertions, 0 deletions

diff --git a/src/plugins/Input/opus/opusproperties.cpp b/src/plugins/Input/opus/opusproperties.cpp
new file mode 100644
index 000000000..89ede973d
--- /dev/null
+++ b/src/plugins/Input/opus/opusproperties.cpp
@@ -0,0 +1,161 @@
+/***************************************************************************
+    copyright            : (C) 2012 by Lukáš Lalinský
+    email                : lalinsky@gmail.com
+
+    copyright            : (C) 2002 - 2008 by Scott Wheeler
+    email                : wheeler@kde.org
+                           (original Vorbis 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                                                       *
+ *                                                                         *
+ *   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 <taglib/tstring.h>
+#include "tdebug.h"
+
+#include <taglib/oggpageheader.h>
+
+#include "opusproperties.h"
+#include "opusfile.h"
+
+using namespace TagLib;
+using namespace TagLib::Ogg;
+
+class Opus::Properties::PropertiesPrivate
+{
+public:
+  PropertiesPrivate(File *f, ReadStyle s) :
+    file(f),
+    style(s),
+    length(0),
+    inputSampleRate(0),
+    channels(0),
+    opusVersion(0) {}
+
+  File *file;
+  ReadStyle style;
+  int length;
+  int inputSampleRate;
+  int channels;
+  int opusVersion;
+};
+
+////////////////////////////////////////////////////////////////////////////////
+// public members
+////////////////////////////////////////////////////////////////////////////////
+
+Opus::Properties::Properties(File *file, ReadStyle style) : AudioProperties(style)
+{
+  d = new PropertiesPrivate(file, style);
+  read();
+}
+
+Opus::Properties::~Properties()
+{
+  delete d;
+}
+
+int Opus::Properties::length() const
+{
+  return d->length;
+}
+
+int Opus::Properties::bitrate() const
+{
+  return 0;
+}
+
+int Opus::Properties::sampleRate() const
+{
+  // Opus can decode any stream at a sample rate of 8, 12, 16, 24, or 48 kHz,
+  // so there is no single sample rate. Let's assume it's the highest
+  // possible.
+  return 48000;
+}
+
+int Opus::Properties::channels() const
+{
+  return d->channels;
+}
+
+int Opus::Properties::inputSampleRate() const
+{
+  return d->inputSampleRate;
+}
+
+int Opus::Properties::opusVersion() const
+{
+  return d->opusVersion;
+}
+
+////////////////////////////////////////////////////////////////////////////////
+// private members
+////////////////////////////////////////////////////////////////////////////////
+
+void Opus::Properties::read()
+{
+  // Get the identification header from the Ogg implementation.
+
+  // http://tools.ietf.org/html/draft-terriberry-oggopus-01#section-5.1
+
+  ByteVector data = d->file->packet(0);
+
+  // *Magic Signature*
+  int pos = 8;
+
+  // *Version* (8 bits, unsigned)
+  d->opusVersion = uchar(data.at(pos));
+  pos += 1;
+
+  // *Output Channel Count* 'C' (8 bits, unsigned)
+  d->channels = uchar(data.at(pos));
+  pos += 1;
+
+  // *Pre-skip* (16 bits, unsigned, little endian)
+  ushort preSkip = data.mid(pos, 2).toUShort(false);
+  pos += 2;
+
+  // *Input Sample Rate* (32 bits, unsigned, little endian)
+  d->inputSampleRate = data.mid(pos, 4).toUInt(false);
+  pos += 4;
+
+  // *Output Gain* (16 bits, signed, little endian)
+  pos += 2;
+
+  // *Channel Mapping Family* (8 bits, unsigned)
+  pos += 1;
+
+  const Ogg::PageHeader *first = d->file->firstPageHeader();
+  const Ogg::PageHeader *last = d->file->lastPageHeader();
+
+  if(first && last) {
+    long long start = first->absoluteGranularPosition();
+    long long end = last->absoluteGranularPosition();
+
+    if(start >= 0 && end >= 0)
+      d->length = (int) ((end - start - preSkip) / 48000);
+    else {
+      debug("Opus::Properties::read() -- The PCM values for the start or "
+            "end of this file was incorrect.");
+    }
+  }
+  else
+    debug("Opus::Properties::read() -- Could not find valid first and last Ogg pages.");
+}