Added abandoned KDE3 version of K3B

git-svn-id: svn://anonsvn.kde.org/home/kde/branches/trinity/applications/k3b@1084400 283d02a7-25f6-0310-bc7c-ecb5cbfe19da

1 files changed, 193 insertions, 0 deletions

diff --git a/plugins/decoder/musepack/k3bmpcwrapper.cpp b/plugins/decoder/musepack/k3bmpcwrapper.cpp
new file mode 100644
index 0000000..9f54b28
--- /dev/null
+++ b/plugins/decoder/musepack/k3bmpcwrapper.cpp
@@ -0,0 +1,193 @@
+/* 
+ *
+ * $Id: k3bmpcwrapper.cpp 619556 2007-01-03 17:38:12Z trueg $
+ * Copyright (C) 2005 Sebastian Trueg <trueg@k3b.org>
+ *
+ * This file is part of the K3b project.
+ * Copyright (C) 1998-2007 Sebastian Trueg <trueg@k3b.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * See the file "COPYING" for the exact licensing terms.
+ */
+
+#include "k3bmpcwrapper.h"
+
+#include <kdebug.h>
+#include <qfile.h>
+
+
+mpc_int32_t read_impl( void* data, void* ptr, mpc_int32_t size )
+{
+  QFile* input = static_cast<QFile*>( data );
+  return input->readBlock( (char*)ptr, size );
+}
+
+
+mpc_bool_t seek_impl( void* data, mpc_int32_t offset )
+{
+  QFile* input = static_cast<QFile*>( data );
+  return input->at( offset );
+}
+
+mpc_int32_t tell_impl( void* data )
+{
+  QFile* input = static_cast<QFile*>( data );
+  return input->at();
+}
+
+mpc_int32_t get_size_impl( void* data )
+{
+  QFile* input = static_cast<QFile*>( data );
+  return input->size();
+}
+
+mpc_bool_t canseek_impl( void* )
+{
+  return true;
+}
+
+
+#ifdef MPC_FIXED_POINT
+static int shift_signed( MPC_SAMPLE_FORMAT val, int shift )
+{
+  if(shift > 0)
+    val <<= shift;
+  else if(shift < 0)
+    val >>= -shift;
+  return (int) val;
+}
+#endif
+
+
+K3bMpcWrapper::K3bMpcWrapper()
+{
+  m_input = new QFile();
+
+  m_reader           = new mpc_reader;
+  m_reader->read     = read_impl;
+  m_reader->seek     = seek_impl;
+  m_reader->tell     = tell_impl;
+  m_reader->get_size = get_size_impl;
+  m_reader->canseek  = canseek_impl;
+  m_reader->data     = m_input;
+
+  m_decoder          = new mpc_decoder;
+
+  m_info             = new mpc_streaminfo;
+}
+
+
+K3bMpcWrapper::~K3bMpcWrapper()
+{
+  close();
+
+  delete m_reader;
+  delete m_decoder;
+  delete m_info;
+  delete m_input;
+}
+
+
+bool K3bMpcWrapper::open( const QString& filename )
+{
+  close();
+
+  m_input->setName( filename );
+
+  if( m_input->open( IO_ReadOnly ) ) {
+    mpc_streaminfo_init( m_info );
+    if( mpc_streaminfo_read( m_info, m_reader ) != ERROR_CODE_OK ) {
+      kdDebug() << "(K3bMpcWrapper) Not a valid musepack file: \"" << filename << "\"" << endl;
+      return false;
+    }
+    else {
+      mpc_decoder_setup( m_decoder, m_reader );
+      if( !mpc_decoder_initialize( m_decoder, m_info ) ) {
+	kdDebug() << "(K3bMpcWrapper) failed to initialize the Musepack decoder." << endl;
+	close();
+	return false;
+      }
+      else {
+	kdDebug() << "(K3bMpcWrapper) valid musepack file. " 
+		  << channels() << " Channels and Samplerate: " << samplerate() << endl;
+	return true;
+      }
+    }
+  }
+  else
+    return false;
+}
+
+
+void K3bMpcWrapper::close()
+{
+  m_input->close();
+}
+
+
+int K3bMpcWrapper::decode( char* data, int max )
+{
+  // FIXME: make this a member variable
+  MPC_SAMPLE_FORMAT sample_buffer[MPC_DECODER_BUFFER_LENGTH];
+
+  unsigned int samples = mpc_decoder_decode( m_decoder, sample_buffer, 0, 0 );
+
+  if( samples*channels()*2 > (unsigned int)max ) {
+    kdDebug() << "(K3bMpcWrapper) buffer not big enough." << endl;
+    return -1;
+  }
+
+  static const unsigned int bps = 16;
+  static const int clip_min = -1 << (bps - 1);
+  static const int clip_max = (1 << (bps - 1)) - 1;
+  static const int float_scale = 1 << (bps - 1);
+
+  for( unsigned int n = 0; n < samples*channels(); ++n ) {
+    int val = 0;
+
+#ifdef MPC_FIXED_POINT
+    val = shift_signed( sample_buffer[n],
+			bps - MPC_FIXED_POINT_SCALE_SHIFT);
+#else
+    val = (int)(sample_buffer[n] * float_scale);
+#endif
+
+    if( val < clip_min )
+      val = clip_min;
+    else if( val > clip_max )
+      val = clip_max;
+
+    data[2*n]   = (val>>8) & 0xff;
+    data[2*n+1] = val & 0xff;
+  }
+
+  return samples*channels()*2;
+}
+
+
+bool K3bMpcWrapper::seek( const K3b::Msf& msf )
+{
+  return mpc_decoder_seek_seconds( m_decoder, (double)msf.totalFrames()/75.0 );
+}
+
+
+K3b::Msf K3bMpcWrapper::length() const
+{
+  return K3b::Msf::fromSeconds( mpc_streaminfo_get_length( m_info ) );
+}
+
+
+int K3bMpcWrapper::samplerate() const
+{
+  return m_info->sample_freq;
+}
+
+
+unsigned int K3bMpcWrapper::channels() const
+{
+  return m_info->channels;
+}
+