From 03ec83ecca47d0858c3d45cde04f8bdea5c9cbb0 Mon Sep 17 00:00:00 2001
From: Tsuda Kageyu <tsuda.kageyu@gmail.com>
Date: Sat, 1 Aug 2015 02:23:18 +0900
Subject: [PATCH] Add AudioProperties::lengthInSeconds() and
 lengthInMilliseconds() functions to emulate virtual abstract functions.

---
 taglib/audioproperties.cpp | 115 ++++++++++++++++++++++++++++++++++++-
 taglib/audioproperties.h   |  17 ++++++
 2 files changed, 131 insertions(+), 1 deletion(-)

diff --git a/taglib/audioproperties.cpp b/taglib/audioproperties.cpp
index 298b97da..4598164c 100644
--- a/taglib/audioproperties.cpp
+++ b/taglib/audioproperties.cpp
@@ -23,6 +23,22 @@
  *   http://www.mozilla.org/MPL/                                           *
  ***************************************************************************/
 
+#include <tbytevector.h>
+
+#include "aiffproperties.h"
+#include "apeproperties.h"
+#include "asfproperties.h"
+#include "flacproperties.h"
+#include "mp4properties.h"
+#include "mpcproperties.h"
+#include "mpegproperties.h"
+#include "opusproperties.h"
+#include "speexproperties.h"
+#include "trueaudioproperties.h"
+#include "vorbisproperties.h"
+#include "wavproperties.h"
+#include "wavpackproperties.h"
+
 #include "audioproperties.h"
 
 using namespace TagLib;
@@ -41,11 +57,108 @@ AudioProperties::~AudioProperties()
 
 }
 
+int TagLib::AudioProperties::lengthInSeconds() const
+{
+  // This is an ugly workaround but we can't add a virtual function.
+  // Should be virtual in taglib2.
+
+  if(dynamic_cast<const APE::Properties*>(this))
+    return dynamic_cast<const APE::Properties*>(this)->lengthInSeconds();
+
+  else if(dynamic_cast<const ASF::Properties*>(this))
+    return dynamic_cast<const ASF::Properties*>(this)->lengthInSeconds();
+
+  else if(dynamic_cast<const FLAC::Properties*>(this))
+    return dynamic_cast<const FLAC::Properties*>(this)->lengthInSeconds();
+
+  else if(dynamic_cast<const MP4::Properties*>(this))
+    return dynamic_cast<const MP4::Properties*>(this)->lengthInSeconds();
+
+  else if(dynamic_cast<const MPC::Properties*>(this))
+    return dynamic_cast<const MPC::Properties*>(this)->lengthInSeconds();
+
+  else if(dynamic_cast<const MPEG::Properties*>(this))
+    return dynamic_cast<const MPEG::Properties*>(this)->lengthInSeconds();
+
+  else if(dynamic_cast<const Ogg::Opus::Properties*>(this))
+    return dynamic_cast<const Ogg::Opus::Properties*>(this)->lengthInSeconds();
+
+  else if(dynamic_cast<const Ogg::Speex::Properties*>(this))
+    return dynamic_cast<const Ogg::Speex::Properties*>(this)->lengthInSeconds();
+
+  else if(dynamic_cast<const TrueAudio::Properties*>(this))
+    return dynamic_cast<const TrueAudio::Properties*>(this)->lengthInSeconds();
+
+  else if (dynamic_cast<const RIFF::AIFF::Properties*>(this))
+    return dynamic_cast<const RIFF::AIFF::Properties*>(this)->lengthInSeconds();
+
+  else if(dynamic_cast<const RIFF::WAV::Properties*>(this))
+    return dynamic_cast<const RIFF::WAV::Properties*>(this)->lengthInSeconds();
+
+  else if(dynamic_cast<const Vorbis::Properties*>(this))
+    return dynamic_cast<const Vorbis::Properties*>(this)->lengthInSeconds();
+
+  else if(dynamic_cast<const WavPack::Properties*>(this))
+    return dynamic_cast<const WavPack::Properties*>(this)->lengthInSeconds();
+
+  else
+    return 0;
+}
+
+int TagLib::AudioProperties::lengthInMilliseconds() const
+{
+  // This is an ugly workaround but we can't add a virtual function.
+  // Should be virtual in taglib2.
+
+  if(dynamic_cast<const APE::Properties*>(this))
+    return dynamic_cast<const APE::Properties*>(this)->lengthInMilliseconds();
+
+  else if(dynamic_cast<const ASF::Properties*>(this))
+    return dynamic_cast<const ASF::Properties*>(this)->lengthInMilliseconds();
+
+  else if(dynamic_cast<const FLAC::Properties*>(this))
+    return dynamic_cast<const FLAC::Properties*>(this)->lengthInMilliseconds();
+
+  else if(dynamic_cast<const MP4::Properties*>(this))
+    return dynamic_cast<const MP4::Properties*>(this)->lengthInMilliseconds();
+
+  else if(dynamic_cast<const MPC::Properties*>(this))
+    return dynamic_cast<const MPC::Properties*>(this)->lengthInMilliseconds();
+
+  else if(dynamic_cast<const MPEG::Properties*>(this))
+    return dynamic_cast<const MPEG::Properties*>(this)->lengthInMilliseconds();
+
+  else if(dynamic_cast<const Ogg::Opus::Properties*>(this))
+    return dynamic_cast<const Ogg::Opus::Properties*>(this)->lengthInMilliseconds();
+
+  else if(dynamic_cast<const Ogg::Speex::Properties*>(this))
+    return dynamic_cast<const Ogg::Speex::Properties*>(this)->lengthInMilliseconds();
+
+  else if(dynamic_cast<const TrueAudio::Properties*>(this))
+    return dynamic_cast<const TrueAudio::Properties*>(this)->lengthInMilliseconds();
+
+  else if(dynamic_cast<const RIFF::AIFF::Properties*>(this))
+    return dynamic_cast<const RIFF::AIFF::Properties*>(this)->lengthInMilliseconds();
+
+  else if(dynamic_cast<const RIFF::WAV::Properties*>(this))
+    return dynamic_cast<const RIFF::WAV::Properties*>(this)->lengthInMilliseconds();
+
+  else if(dynamic_cast<const Vorbis::Properties*>(this))
+    return dynamic_cast<const Vorbis::Properties*>(this)->lengthInMilliseconds();
+
+  else if(dynamic_cast<const WavPack::Properties*>(this))
+    return dynamic_cast<const WavPack::Properties*>(this)->lengthInMilliseconds();
+
+  else
+    return 0;
+}
+
 ////////////////////////////////////////////////////////////////////////////////
 // protected methods
 ////////////////////////////////////////////////////////////////////////////////
 
-AudioProperties::AudioProperties(ReadStyle)
+AudioProperties::AudioProperties(ReadStyle) :
+  d(0)
 {
 
 }
diff --git a/taglib/audioproperties.h b/taglib/audioproperties.h
index 4648dcc2..f27aefca 100644
--- a/taglib/audioproperties.h
+++ b/taglib/audioproperties.h
@@ -69,6 +69,23 @@ namespace TagLib {
      */
     virtual int length() const = 0;
 
+    /*!
+     * Returns the length of the file in seconds.  The length is rounded down to
+     * the nearest whole second.
+     *
+     * \see lengthInMilliseconds()
+     */
+    // BIC: make virtual
+    int lengthInSeconds() const;
+
+    /*!
+     * Returns the length of the file in milliseconds.
+     *
+     * \see lengthInSeconds()
+     */
+    // BIC: make virtual
+    int lengthInMilliseconds() const;
+
     /*!
      * Returns the most appropriate bit rate for the file in kb/s.  For constant
      * bitrate formats this is simply the bitrate of the file.  For variable