Implement filter framework + currently only the "downmix" filter is implemented, so we can support multichannel to MP3 encoding from now on.

LameXP.vcproj

@@ -310,6 +310,10 @@
 				RelativePath=".\src\Decoder_Vorbis.cpp"
 				>
 			</File>
+			<File
+				RelativePath=".\src\Decoder_Wave.cpp"
+				>
+			</File>
 			<File
 				RelativePath=".\src\Decoder_WMA.cpp"
 				>
@@ -370,6 +374,14 @@
 				RelativePath=".\src\Encoder_Wave.cpp"
 				>
 			</File>
+			<File
+				RelativePath=".\src\Filter_Abstract.cpp"
+				>
+			</File>
+			<File
+				RelativePath=".\src\Filter_Downmix.cpp"
+				>
+			</File>
 			<File
 				RelativePath=".\src\Genres.cpp"
 				>
@@ -502,6 +514,10 @@
 				RelativePath=".\src\Decoder_Vorbis.h"
 				>
 			</File>
+			<File
+				RelativePath=".\src\Decoder_Wave.h"
+				>
+			</File>
 			<File
 				RelativePath=".\src\Decoder_WMA.h"
 				>
@@ -951,6 +967,40 @@
 			<File
 				RelativePath=".\src\Encoder_Wave.h"
 				>
+				<FileConfiguration
+					Name="Debug|Win32"
+					>
+					<Tool
+						Name="VCCustomBuildTool"
+						Description="MOC &quot;$(SolutionDir)tmp\MOC_$(SafeInputName).cpp&quot;"
+						CommandLine="&quot;$(QTDIR)\bin\moc.exe&quot; -o &quot;$(SolutionDir)tmp\MOC_$(SafeInputName).cpp&quot; &quot;$(InputPath)&quot;&#x0D;&#x0A;"
+						Outputs="&quot;$(SolutionDir)tmp\MOC_$(SafeInputName).cpp&quot;"
+					/>
+				</FileConfiguration>
+				<FileConfiguration
+					Name="Release|Win32"
+					>
+					<Tool
+						Name="VCCustomBuildTool"
+						Description="MOC &quot;$(SolutionDir)tmp\MOC_$(SafeInputName).cpp&quot;"
+						CommandLine="&quot;$(QTDIR)\bin\moc.exe&quot; -o &quot;$(SolutionDir)tmp\MOC_$(SafeInputName).cpp&quot; &quot;$(InputPath)&quot;&#x0D;&#x0A;"
+						Outputs="&quot;$(SolutionDir)tmp\MOC_$(SafeInputName).cpp&quot;"
+					/>
+				</FileConfiguration>
+				<FileConfiguration
+					Name="Release_Static|Win32"
+					>
+					<Tool
+						Name="VCCustomBuildTool"
+						Description="MOC &quot;$(SolutionDir)tmp\MOC_$(SafeInputName).cpp&quot;"
+						CommandLine="&quot;$(QTDIR)\bin\moc.exe&quot; -o &quot;$(SolutionDir)tmp\MOC_$(SafeInputName).cpp&quot; &quot;$(InputPath)&quot;&#x0D;&#x0A;"
+						Outputs="&quot;$(SolutionDir)tmp\MOC_$(SafeInputName).cpp&quot;"
+					/>
+				</FileConfiguration>
+			</File>
+			<File
+				RelativePath=".\src\Filter_Abstract.h"
+				>
 				<FileConfiguration
 					Name="Debug|Win32"
 					>
@@ -982,6 +1032,10 @@
 					/>
 				</FileConfiguration>
 			</File>
+			<File
+				RelativePath=".\src\Filter_Downmix.h"
+				>
+			</File>
 			<File
 				RelativePath=".\src\Genres.h"
 				>
@@ -1394,6 +1448,10 @@
 				RelativePath=".\tmp\MOC_Encoder_Wave.cpp"
 				>
 			</File>
+			<File
+				RelativePath=".\tmp\MOC_Filter_Abstract.cpp"
+				>
+			</File>
 			<File
 				RelativePath=".\tmp\MOC_Model_FileList.cpp"
 				>

etc/NSIS/setup.nsi

@@ -54,6 +54,7 @@
 ;--------------------------------
 
 !include `MUI2.nsh`
+!include `WinVer.nsh`
 !include `UAC.nsh`
 !include `parameters.nsh`
 
@@ -223,6 +224,7 @@ LangString LAMEXP_LANG_LOCKEDLIST_NOPROG   ${LANG_ENGLISH} "No programs that hav
 LangString LAMEXP_LANG_LOCKEDLIST_SEARCH   ${LANG_ENGLISH} "Searching, please wait..."
 LangString LAMEXP_LANG_LOCKEDLIST_COLHDR1  ${LANG_ENGLISH} "Application"
 LangString LAMEXP_LANG_LOCKEDLIST_COLHDR2  ${LANG_ENGLISH} "Process"
+LangString LAMEXP_LANG_UNINST_PERSONAL     ${LANG_ENGLISH} "Do you want your personal settings to be deleted too?"
 
 ;German
 LangString LAMEXP_LANG_STATUS_CLOSING      ${LANG_GERMAN} "Schließe laufende Instanz, bitte warten..."
@@ -238,6 +240,7 @@ LangString LAMEXP_LANG_LOCKEDLIST_NOPROG   ${LANG_GERMAN} "Es m
 LangString LAMEXP_LANG_LOCKEDLIST_SEARCH   ${LANG_GERMAN} "Suche, bitte warten..."
 LangString LAMEXP_LANG_LOCKEDLIST_COLHDR1  ${LANG_GERMAN} "Anwendung"
 LangString LAMEXP_LANG_LOCKEDLIST_COLHDR2  ${LANG_GERMAN} "Prozess"
+LangString LAMEXP_LANG_UNINST_PERSONAL     ${LANG_GERMAN} "Sollen Ihre persönlichen Einstellungen ebenfalls gelöscht werden?"
 
 
 ;--------------------------------
@@ -254,6 +257,19 @@ Function .onInit
 		MessageBox MB_ICONSTOP|MB_TOPMOST "Sorry, the installer is already running!"
 		Quit
 	${EndIf}  
+
+	${If} ${IsNT}
+		Goto OS_Windows_NT
+	${Else}
+		MessageBox MB_TOPMOST|MB_ICONSTOP "Sorry, the Windows 9x series (including ME) is not supported by this application!"
+		Quit
+	${EndIf}
+  
+	OS_Windows_NT:
+	${If} ${AtMostWinNT4}
+		MessageBox MB_TOPMOST|MB_ICONSTOP "Sorry, Windows NT 4.0 (and older) is not supported by this application!"
+		Quit
+	${EndIf}
 FunctionEnd
 
 Function un.onInit
@@ -430,6 +446,9 @@ Section "Uninstall"
 	DeleteRegValue HKLM "${MyRegPath}" "StartmenuFolder"
 	DeleteRegValue HKLM "${MyRegPath}" "SetupLanguage"
 	
+	MessageBox MB_YESNO|MB_TOPMOST "$(LAMEXP_LANG_UNINST_PERSONAL)" IDNO +2
+	Delete "$LOCALAPPDATA\LoRd_MuldeR\LameXP - Audio Encoder Front-End\config.ini"
+
 	!insertmacro PrintProgress "$(MUI_UNTEXT_FINISH_TITLE)."
 SectionEnd
 

res/Tools.qrc

@@ -19,6 +19,7 @@
     <file>tools/oggenc2_x64.exe</file>
     <file>tools/selfdelete.exe</file>
     <file>tools/shorten.exe</file>
+    <file>tools/sox.exe</file>
     <file>tools/speexdec.exe</file>
     <file>tools/takc.exe</file>
     <file>tools/ttaenc.exe</file>

src/Config.h

@@ -25,7 +25,7 @@
 #define VER_LAMEXP_MAJOR				4
 #define VER_LAMEXP_MINOR_HI				0
 #define VER_LAMEXP_MINOR_LO				0
-#define VER_LAMEXP_BUILD				163
+#define VER_LAMEXP_BUILD				167
 #define VER_LAMEXP_SUFFIX				TechPreview
 
 /*

src/Decoder_Wave.cpp

@@ -0,0 +1,88 @@
+///////////////////////////////////////////////////////////////////////////////
+// LameXP - Audio Encoder Front-End
+// Copyright (C) 2004-2010 LoRd_MuldeR <MuldeR2@GMX.de>
+//
+// 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.
+//
+// This program 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 General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License along
+// with this program; if not, write to the Free Software Foundation, Inc.,
+// 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+//
+// http://www.gnu.org/licenses/gpl-2.0.txt
+///////////////////////////////////////////////////////////////////////////////
+
+#include "Decoder_Wave.h"
+
+#include "Global.h"
+
+#include <QDir>
+#include <QProcess>
+#include <QRegExp>
+#include <Shellapi.h>
+
+#define FIX_SEPARATORS(STR) for(int i = 0; STR[i]; i++) { if(STR[i] == L'/') STR[i] = L'\\'; }
+
+WaveDecoder::WaveDecoder(void)
+{
+}
+
+WaveDecoder::~WaveDecoder(void)
+{
+}
+
+bool WaveDecoder::decode(const QString &sourceFile, const QString &outputFile, volatile bool *abortFlag)
+{
+	emit messageLogged(QString("Copy file \"%1\" to \"%2\"").arg(sourceFile, outputFile));
+	
+	SHFILEOPSTRUCTW fileOperation;
+	memset(&fileOperation, 0, sizeof(SHFILEOPSTRUCTW));
+	fileOperation.wFunc = FO_COPY;
+	fileOperation.fFlags = FOF_SILENT | FOF_NOCONFIRMATION | FOF_NOCONFIRMMKDIR | FOF_NOERRORUI | FOF_FILESONLY;
+
+	size_t srcLen = wcslen(reinterpret_cast<const wchar_t*>(sourceFile.utf16())) + 3;
+	wchar_t *srcBuffer = new wchar_t[srcLen];
+	memset(srcBuffer, 0, srcLen * sizeof(wchar_t));
+	wcscpy_s(srcBuffer, srcLen, reinterpret_cast<const wchar_t*>(sourceFile.utf16()));
+	FIX_SEPARATORS (srcBuffer);
+	fileOperation.pFrom = srcBuffer;
+
+	size_t outLen = wcslen(reinterpret_cast<const wchar_t*>(outputFile.utf16())) + 3;
+	wchar_t *outBuffer = new wchar_t[outLen];
+	memset(outBuffer, 0, outLen * sizeof(wchar_t));
+	wcscpy_s(outBuffer, outLen, reinterpret_cast<const wchar_t*>(outputFile.utf16()));
+	FIX_SEPARATORS (outBuffer);
+	fileOperation.pTo = outBuffer;
+
+	emit statusUpdated(0);
+	int result = SHFileOperation(&fileOperation);
+	emit statusUpdated(100);
+
+	emit messageLogged(QString().sprintf("\nExited with code: 0x%04X", result));
+
+	delete [] srcBuffer;
+	delete [] outBuffer;
+
+	return (result == 0 && fileOperation.fAnyOperationsAborted == false);
+}
+
+bool WaveDecoder::isFormatSupported(const QString &containerType, const QString &containerProfile, const QString &formatType, const QString &formatProfile, const QString &formatVersion)
+{
+	if(containerType.compare("Wave", Qt::CaseInsensitive) == 0)
+	{
+		if(formatType.compare("PCM", Qt::CaseInsensitive) == 0)
+		{
+			return true;
+		}
+	}
+
+	return false;
+}
+

src/Decoder_Wave.h

@@ -0,0 +1,34 @@
+///////////////////////////////////////////////////////////////////////////////
+// LameXP - Audio Encoder Front-End
+// Copyright (C) 2004-2010 LoRd_MuldeR <MuldeR2@GMX.de>
+//
+// 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.
+//
+// This program 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 General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License along
+// with this program; if not, write to the Free Software Foundation, Inc.,
+// 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+//
+// http://www.gnu.org/licenses/gpl-2.0.txt
+///////////////////////////////////////////////////////////////////////////////
+
+#pragma once
+
+#include "Decoder_Abstract.h"
+
+class WaveDecoder : public AbstractDecoder
+{
+public:
+	WaveDecoder(void);
+	~WaveDecoder(void);
+
+	virtual bool decode(const QString &sourceFile, const QString &outputFile, volatile bool *abortFlag);
+	static bool isFormatSupported(const QString &containerType, const QString &containerProfile, const QString &formatType, const QString &formatProfile, const QString &formatVersion);
+};

src/Dialog_About.cpp

@@ -244,11 +244,16 @@ void AboutDialog::showMoreAbout(void)
 	moreAboutText += LINK("http://flac.sourceforge.net/");
 	moreAboutText += "<br>";
 	
-	moreAboutText += VSTR("<li><b>MediaInfo - Media File Analysis Tool (%1)</b><br>", "mediainfo_i386.exe", "v?.?.??");
+	moreAboutText += VSTR("<li><b>MediaInfo - Media File Analysis Tool (%1)</b><br>", "mediainfo_i386.exe", "v?.?.?");
 	moreAboutText += "Released under the terms of the GNU Leser General Public License.<br>";
 	moreAboutText += LINK("http://mediainfo.sourceforge.net/");
 	moreAboutText += "<br>";
 
+	moreAboutText += VSTR("<li><b>SoX - Sound eXchange (%1)</b><br>", "sox.exe", "v??.?.?");
+	moreAboutText += "Released under the terms of the GNU Leser General Public License.<br>";
+	moreAboutText += LINK("http://sox.sourceforge.net/");
+	moreAboutText += "<br>";
+	
 	moreAboutText += "<li><b>Silk Icons - Over 700  icons in PNG format (v1.3)</b><br>";
 	moreAboutText += "<nobr>By Mark James, released under the Creative Commons 'by' License.</nobr><br>";
 	moreAboutText += LINK("http://www.famfamfam.com/lab/icons/silk/");

src/Dialog_MainWindow.cpp

@@ -584,6 +584,9 @@ void MainWindow::aboutButtonClicked(void)
  */
 void MainWindow::encodeButtonClicked(void)
 {
+	static const __int64 oneGigabyte = 1073741824; 
+	static const __int64 minimumFreeDiskspaceMultiplier = 222;
+	
 	ABORT_IF_BUSY;
 	
 	if(m_fileListModel->rowCount() < 1)
@@ -593,6 +596,16 @@ void MainWindow::encodeButtonClicked(void)
 		return;
 	}
 	
+	if(lamexp_free_diskspace(lamexp_temp_folder()) < (oneGigabyte * minimumFreeDiskspaceMultiplier))
+	{
+		QDir tempFolder(lamexp_temp_folder());
+		tempFolder.cdUp();
+		if(QMessageBox::warning(this, "Low Diskspace Warning", QString("<nobr>Warning: There are less than %1 GB of free diskspace available on your system's TEMP folder!</nobr><br><br>Your TEMP folder is located at:<br><i>%2</i>").arg(QString::number(minimumFreeDiskspaceMultiplier), tempFolder.path()), "Abort Process (Recommended)", "Ignore") != 1)
+		{
+			return;
+		}
+	}
+
 	switch(m_settings->compressionEncoder())
 	{
 	case SettingsModel::MP3Encoder:

src/Dialog_Processing.cpp

@@ -339,7 +339,7 @@ void ProcessingDialog::doneEncoding(void)
 		}
 		else
 		{
-			CHANGE_BACKGROUND_COLOR(frame_header, QColor("#D1FFD5"));
+			CHANGE_BACKGROUND_COLOR(frame_header, QColor("#E0FFE2"));
 			WinSevenTaskbar::setTaskbarState(this, WinSevenTaskbar::WinSevenTaskbarNormalState);
 			WinSevenTaskbar::setOverlayIcon(this, &QIcon(":/icons/accept.png"));
 			SET_PROGRESS_TEXT("Alle files completed successfully.");

src/Encoder_Abstract.cpp

@@ -39,3 +39,11 @@ AbstractEncoder::~AbstractEncoder(void)
 
 void AbstractEncoder::setBitrate(int bitrate) { m_configBitrate = max(0, bitrate); }
 void AbstractEncoder::setRCMode(int mode) { m_configRCMode = max(0, mode); }
+
+/*
+ * Default implementation
+ */
+bool AbstractEncoder::requiresDownmix(void)
+{
+	return false;
+}

src/Encoder_Abstract.h

@@ -40,6 +40,7 @@ public:
 	virtual bool encode(const QString &sourceFile, const AudioFileModel &metaInfo, const QString &outputFile, volatile bool *abortFlag) = 0;
 	virtual bool isFormatSupported(const QString &containerType, const QString &containerProfile, const QString &formatType, const QString &formatProfile, const QString &formatVersion) = 0;
 	virtual QString extension(void) = 0;
+	virtual bool requiresDownmix(void);
 
 	//Common setter methods
 	void setBitrate(int bitrate);

src/Encoder_MP3.cpp

@@ -173,3 +173,8 @@ bool MP3Encoder::isFormatSupported(const QString &containerType, const QString &
 
 	return false;
 }
+
+bool MP3Encoder::requiresDownmix(void)
+{
+	return true;
+}

src/Encoder_MP3.h

@@ -36,6 +36,7 @@ public:
 	virtual bool encode(const QString &sourceFile, const AudioFileModel &metaInfo, const QString &outputFile, volatile bool *abortFlag);
 	virtual bool isFormatSupported(const QString &containerType, const QString &containerProfile, const QString &formatType, const QString &formatProfile, const QString &formatVersion);
 	virtual QString extension(void);
+	virtual bool requiresDownmix(void);
 
 private:
 	const QString m_binary;

src/Filter_Abstract.cpp

@@ -0,0 +1,30 @@
+///////////////////////////////////////////////////////////////////////////////
+// LameXP - Audio Encoder Front-End
+// Copyright (C) 2004-2010 LoRd_MuldeR <MuldeR2@GMX.de>
+//
+// 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.
+//
+// This program 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 General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License along
+// with this program; if not, write to the Free Software Foundation, Inc.,
+// 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+//
+// http://www.gnu.org/licenses/gpl-2.0.txt
+///////////////////////////////////////////////////////////////////////////////
+
+#include "Filter_Abstract.h"
+
+AbstractFilter::AbstractFilter(void)
+{
+}
+
+AbstractFilter::~AbstractFilter(void)
+{
+}

src/Filter_Abstract.h

@@ -0,0 +1,37 @@
+///////////////////////////////////////////////////////////////////////////////
+// LameXP - Audio Encoder Front-End
+// Copyright (C) 2004-2010 LoRd_MuldeR <MuldeR2@GMX.de>
+//
+// 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.
+//
+// This program 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 General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License along
+// with this program; if not, write to the Free Software Foundation, Inc.,
+// 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+//
+// http://www.gnu.org/licenses/gpl-2.0.txt
+///////////////////////////////////////////////////////////////////////////////
+
+#pragma once
+
+#include "Tool_Abstract.h"
+
+class AbstractFilter : public AbstractTool
+{
+	Q_OBJECT
+
+public:
+	AbstractFilter(void);
+	~AbstractFilter(void);
+
+	//Internal decoder API
+	virtual bool apply(const QString &sourceFile, const QString &outputFile, volatile bool *abortFlag) = 0;
+};
+

src/Filter_Downmix.cpp

@@ -0,0 +1,106 @@
+///////////////////////////////////////////////////////////////////////////////
+// LameXP - Audio Encoder Front-End
+// Copyright (C) 2004-2010 LoRd_MuldeR <MuldeR2@GMX.de>
+//
+// 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.
+//
+// This program 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 General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License along
+// with this program; if not, write to the Free Software Foundation, Inc.,
+// 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+//
+// http://www.gnu.org/licenses/gpl-2.0.txt
+///////////////////////////////////////////////////////////////////////////////
+
+#include "Filter_Downmix.h"
+
+#include "Global.h"
+
+#include <QDir>
+#include <QProcess>
+#include <QRegExp>
+
+DownmixFilter::DownmixFilter(void)
+:
+	m_binary(lamexp_lookup_tool("sox.exe"))
+{
+	if(m_binary.isEmpty())
+	{
+		throw "Error initializing SoX filter. Tool 'sox.exe' is not registred!";
+	}
+}
+
+DownmixFilter::~DownmixFilter(void)
+{
+}
+
+bool DownmixFilter::apply(const QString &sourceFile, const QString &outputFile, volatile bool *abortFlag)
+{
+	QProcess process;
+	QStringList args;
+
+	args << "-V3";
+	args << QDir::toNativeSeparators(sourceFile);
+	args << "-c2";
+	args << QDir::toNativeSeparators(outputFile);
+
+	if(!startProcess(process, m_binary, args))
+	{
+		return false;
+	}
+
+	bool bTimeout = false;
+	bool bAborted = false;
+
+	while(process.state() != QProcess::NotRunning)
+	{
+		if(*abortFlag)
+		{
+			process.kill();
+			bAborted = true;
+			emit messageLogged("\nABORTED BY USER !!!");
+			break;
+		}
+		process.waitForReadyRead();
+		if(!process.bytesAvailable() && process.state() == QProcess::Running)
+		{
+			process.kill();
+			qWarning("SoX process timed out <-- killing!");
+			bTimeout = true;
+			break;
+		}
+		while(process.bytesAvailable() > 0)
+		{
+			QByteArray line = process.readLine();
+			QString text = QString::fromUtf8(line.constData()).simplified();
+			if(!text.isEmpty())
+			{
+				emit messageLogged(text);
+			}
+		}
+	}
+
+	process.waitForFinished();
+	if(process.state() != QProcess::NotRunning)
+	{
+		process.kill();
+		process.waitForFinished(-1);
+	}
+	
+	emit statusUpdated(100);
+	emit messageLogged(QString().sprintf("\nExited with code: 0x%04X", process.exitCode()));
+
+	if(bTimeout || bAborted || process.exitStatus() != QProcess::NormalExit || QFileInfo(outputFile).size() == 0)
+	{
+		return false;
+	}
+	
+	return true;
+}

src/Filter_Downmix.h

@@ -0,0 +1,36 @@
+///////////////////////////////////////////////////////////////////////////////
+// LameXP - Audio Encoder Front-End
+// Copyright (C) 2004-2010 LoRd_MuldeR <MuldeR2@GMX.de>
+//
+// 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.
+//
+// This program 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 General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License along
+// with this program; if not, write to the Free Software Foundation, Inc.,
+// 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+//
+// http://www.gnu.org/licenses/gpl-2.0.txt
+///////////////////////////////////////////////////////////////////////////////
+
+#pragma once
+
+#include "Filter_Abstract.h"
+
+class DownmixFilter : public AbstractFilter
+{
+public:
+	DownmixFilter(void);
+	~DownmixFilter(void);
+
+	virtual bool apply(const QString &sourceFile, const QString &outputFile, volatile bool *abortFlag);
+
+private:
+	const QString m_binary;
+};

src/Global.cpp

@@ -907,6 +907,23 @@ QString lamexp_known_folder(lamexp_known_folder_t folder_id)
 	return folder;
 }
 
+
+/*
+ * Get number private bytes [debug only]
+ */
+__int64 lamexp_free_diskspace(const QString &path)
+{
+	ULARGE_INTEGER freeBytesAvailable, totalNumberOfBytes, totalNumberOfFreeBytes;
+	if(GetDiskFreeSpaceExW(reinterpret_cast<const wchar_t*>(QDir::toNativeSeparators(path).utf16()), &freeBytesAvailable, &totalNumberOfBytes, &totalNumberOfFreeBytes))
+	{
+		return freeBytesAvailable.QuadPart;
+	}
+	else
+	{
+		return 0;
+	}
+}
+
 /*
  * Get number private bytes [debug only]
  */

src/Global.h

@@ -94,6 +94,7 @@ lamexp_cpu_t lamexp_detect_cpu_features(void);
 bool lamexp_clean_folder(const QString folderPath);
 const QString lamexp_version2string(const QString &pattern, unsigned int version);
 QString lamexp_known_folder(lamexp_known_folder_t folder_id);
+__int64 lamexp_free_diskspace(const QString &path);
 
 //Debug-only functions
 SIZE_T lamexp_dbg_private_bytes(void);

src/Registry_Decoder.cpp

@@ -26,6 +26,7 @@
 #include "Decoder_Vorbis.h"
 #include "Decoder_FLAC.h"
 #include "Decoder_WMA.h"
+#include "Decoder_Wave.h"
 
 #include <QString>
 
@@ -38,6 +39,7 @@ AbstractDecoder *DecoderRegistry::lookup(const QString &containerType, const QSt
 	PROBE_DECODER(AACDecoder);
 	PROBE_DECODER(FLACDecoder);
 	PROBE_DECODER(WMADecoder);
+	PROBE_DECODER(WaveDecoder);
 	return NULL;
 }
 

src/Thread_Initialization.cpp

@@ -64,6 +64,7 @@ static const struct lamexp_tool_t g_lamexp_tools[] =
 	{"a8c50872e544a55495a824426e9378984f2ae01d", "oggenc2_x64.exe", 287},
 	{"cd95369051f96b9ca3a997658771c5ea52bc874d", "selfdelete.exe", UINT_MAX},
 	{"ffeaa70bd6321185eafcb067ab2dc441650038bf", "shorten.exe", UINT_MAX},
+	{"831f898daaba8d9787c5c02b5f4f8ace9e77de99", "sox.exe", 1431},
 	{"346ce516281c97e92e1b8957ddeca52edcf2d056", "speexdec.exe", UINT_MAX},
 	{"8a74b767cfe88bf88c068fdae0de02d65589d25e", "takc.exe", UINT_MAX},
 	{"1c5cedb56358a0e8c4590a863a97c94d7d7e98b2", "ttaenc.exe", UINT_MAX},

src/Thread_Process.cpp

@@ -26,6 +26,8 @@
 #include "Model_Progress.h"
 #include "Encoder_Abstract.h"
 #include "Decoder_Abstract.h"
+#include "Filter_Abstract.h"
+#include "Filter_Downmix.h"
 #include "Registry_Decoder.h"
 #include "Model_Settings.h"
 
@@ -94,7 +96,7 @@ void ProcessThread::processFile()
 {
 	m_aborted = false;
 	bool bSuccess = true;
-
+		
 	qDebug("Process thread %s has started.", m_jobId.toString().toLatin1().constData());
 	emit processStateInitialized(m_jobId, QFileInfo(m_audioFile.filePath()).fileName(), "Starting...", ProgressModel::JobRunning);
 
@@ -107,10 +109,18 @@ void ProcessThread::processFile()
 		return;
 	}
 
+	QList<AbstractFilter*> filters;
+	
+	//Do we need Stereo downmix?
+	if(m_audioFile.formatAudioChannels() > 2 && m_encoder->requiresDownmix())
+	{
+		filters.prepend(new DownmixFilter());
+	}
+
 	QString sourceFile = m_audioFile.filePath();
 
 	//Decode source file
-	if(!m_encoder->isFormatSupported(m_audioFile.formatContainerType(), m_audioFile.formatContainerProfile(), m_audioFile.formatAudioType(), m_audioFile.formatAudioProfile(), m_audioFile.formatAudioVersion()))
+	if(!filters.isEmpty() || !m_encoder->isFormatSupported(m_audioFile.formatContainerType(), m_audioFile.formatContainerProfile(), m_audioFile.formatAudioType(), m_audioFile.formatAudioProfile(), m_audioFile.formatAudioVersion()))
 	{
 		m_currentStep = DecodingStep;
 		AbstractDecoder *decoder = DecoderRegistry::lookup(m_audioFile.formatContainerType(), m_audioFile.formatContainerProfile(), m_audioFile.formatAudioType(), m_audioFile.formatAudioProfile(), m_audioFile.formatAudioVersion());
@@ -139,6 +149,30 @@ void ProcessThread::processFile()
 		}
 	}
 
+	//Apply all filters
+	while(!filters.isEmpty())
+	{
+		QString tempFile = generateTempFileName();
+		AbstractFilter *poFilter = filters.takeFirst();
+
+		if(bSuccess)
+		{
+			connect(poFilter, SIGNAL(statusUpdated(int)), this, SLOT(handleUpdate(int)), Qt::DirectConnection);
+			connect(poFilter, SIGNAL(messageLogged(QString)), this, SLOT(handleMessage(QString)), Qt::DirectConnection);
+
+			m_currentStep = FilteringStep;
+			bSuccess = poFilter->apply(sourceFile, tempFile, &m_aborted);
+
+			if(bSuccess)
+			{
+				sourceFile = tempFile;
+				handleMessage("\n-------------------------------\n");
+			}
+		}
+
+		delete poFilter;
+	}
+
 	//Encode audio file
 	if(bSuccess)
 	{
@@ -171,6 +205,9 @@ void ProcessThread::handleUpdate(int progress)
 	case EncodingStep:
 		emit processStateChanged(m_jobId, QString("Encoding (%1%)").arg(QString::number(progress)), ProgressModel::JobRunning);
 		break;
+	case FilteringStep:
+		emit processStateChanged(m_jobId, QString("Filtering (%1%)").arg(QString::number(progress)), ProgressModel::JobRunning);
+		break;
 	case DecodingStep:
 		emit processStateChanged(m_jobId, QString("Decoding (%1%)").arg(QString::number(progress)), ProgressModel::JobRunning);
 		break;