/*
** music_fluidsynth_mididevice.cpp
** Provides access to FluidSynth as a generic MIDI device.
**
**---------------------------------------------------------------------------
** Copyright 2010 Randy Heit
** All rights reserved.
**
** Redistribution and use in source and binary forms, with or without
** modification, are permitted provided that the following conditions
** are met:
**
** 1. Redistributions of source code must retain the above copyright
**    notice, this list of conditions and the following disclaimer.
** 2. Redistributions in binary form must reproduce the above copyright
**    notice, this list of conditions and the following disclaimer in the
**    documentation and/or other materials provided with the distribution.
** 3. The name of the author may not be used to endorse or promote products
**    derived from this software without specific prior written permission.
**
** THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
** IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
** OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
** IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
** INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
** NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
** THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
**---------------------------------------------------------------------------
**
*/

// HEADER FILES ------------------------------------------------------------

#include <mutex>
#include <stdio.h>
#include <stdlib.h>
#include "mididevice.h"
#include "zmusic/mus2midi.h"

// FluidSynth implementation of a MIDI device -------------------------------

FluidConfig fluidConfig;

#ifdef HAVE_FLUIDSYNTH

#if !defined DYN_FLUIDSYNTH
#include <fluidsynth.h>
#else
#include "i_module.h"
extern FModule FluidSynthModule;

struct fluid_settings_t;
struct fluid_synth_t;
#endif

class FluidSynthMIDIDevice : public SoftSynthMIDIDevice
{
public:
	FluidSynthMIDIDevice(int samplerate, std::vector<std::string> &config, int (*printfunc_)(const char *, ...));
	~FluidSynthMIDIDevice();
	
	int OpenRenderer() override;
	std::string GetStats() override;
	void ChangeSettingInt(const char *setting, int value) override;
	void ChangeSettingNum(const char *setting, double value) override;
	void ChangeSettingString(const char *setting, const char *value) override;
	int GetDeviceType() const override { return MDEV_FLUIDSYNTH; }
	
protected:
	void HandleEvent(int status, int parm1, int parm2) override;
	void HandleLongEvent(const uint8_t *data, int len) override;
	void ComputeOutput(float *buffer, int len) override;
	int LoadPatchSets(const std::vector<std::string>& config);
	
	fluid_settings_t *FluidSettings;
	fluid_synth_t *FluidSynth;
	int (*printfunc)(const char*, ...);

	// Possible results returned by fluid_settings_...() functions
	// Initial values are for FluidSynth 2.x
	int FluidSettingsResultOk     = FLUID_OK;
	int FluidSettingsResultFailed = FLUID_FAILED;

#ifdef DYN_FLUIDSYNTH
	enum { FLUID_FAILED = -1, FLUID_OK = 0 };
	static TReqProc<FluidSynthModule, void (*)(int *, int*, int*)> fluid_version;
	static TReqProc<FluidSynthModule, fluid_settings_t *(*)()> new_fluid_settings;
	static TReqProc<FluidSynthModule, fluid_synth_t *(*)(fluid_settings_t *)> new_fluid_synth;
	static TReqProc<FluidSynthModule, int (*)(fluid_synth_t *)> delete_fluid_synth;
	static TReqProc<FluidSynthModule, void (*)(fluid_settings_t *)> delete_fluid_settings;
	static TReqProc<FluidSynthModule, int (*)(fluid_settings_t *, const char *, double)> fluid_settings_setnum;
	static TReqProc<FluidSynthModule, int (*)(fluid_settings_t *, const char *, const char *)> fluid_settings_setstr;
	static TReqProc<FluidSynthModule, int (*)(fluid_settings_t *, const char *, int)> fluid_settings_setint;
	static TReqProc<FluidSynthModule, int (*)(fluid_settings_t *, const char *, int *)> fluid_settings_getint;
	static TReqProc<FluidSynthModule, void (*)(fluid_synth_t *, int)> fluid_synth_set_reverb_on;
	static TReqProc<FluidSynthModule, void (*)(fluid_synth_t *, int)> fluid_synth_set_chorus_on;
	static TReqProc<FluidSynthModule, int (*)(fluid_synth_t *, int, int)> fluid_synth_set_interp_method;
	static TReqProc<FluidSynthModule, int (*)(fluid_synth_t *, int)> fluid_synth_set_polyphony;
	static TReqProc<FluidSynthModule, int (*)(fluid_synth_t *)> fluid_synth_get_polyphony;
	static TReqProc<FluidSynthModule, int (*)(fluid_synth_t *)> fluid_synth_get_active_voice_count;
	static TReqProc<FluidSynthModule, double (*)(fluid_synth_t *)> fluid_synth_get_cpu_load;
	static TReqProc<FluidSynthModule, int (*)(fluid_synth_t *)> fluid_synth_system_reset;
	static TReqProc<FluidSynthModule, int (*)(fluid_synth_t *, int, int, int)> fluid_synth_noteon;
	static TReqProc<FluidSynthModule, int (*)(fluid_synth_t *, int, int)> fluid_synth_noteoff;
	static TReqProc<FluidSynthModule, int (*)(fluid_synth_t *, int, int, int)> fluid_synth_cc;
	static TReqProc<FluidSynthModule, int (*)(fluid_synth_t *, int, int)> fluid_synth_program_change;
	static TReqProc<FluidSynthModule, int (*)(fluid_synth_t *, int, int)> fluid_synth_channel_pressure;
	static TReqProc<FluidSynthModule, int (*)(fluid_synth_t *, int, int)> fluid_synth_pitch_bend;
	static TReqProc<FluidSynthModule, int (*)(fluid_synth_t *, int, void *, int, int, void *, int, int)> fluid_synth_write_float;
	static TReqProc<FluidSynthModule, int (*)(fluid_synth_t *, const char *, int)> fluid_synth_sfload;
	static TReqProc<FluidSynthModule, void (*)(fluid_synth_t *, double, double, double, double)> fluid_synth_set_reverb;
	static TReqProc<FluidSynthModule, void (*)(fluid_synth_t *, int, double, double, double, int)> fluid_synth_set_chorus;
	static TReqProc<FluidSynthModule, int (*)(fluid_synth_t *, const char *, int, char *, int *, int *, int)> fluid_synth_sysex;
	
	bool LoadFluidSynth(const char *fluid_lib);
	void UnloadFluidSynth();
#endif
};

// MACROS ------------------------------------------------------------------

#ifdef DYN_FLUIDSYNTH

#ifdef _WIN32

#ifndef _M_X64
#define FLUIDSYNTHLIB1	"fluidsynth.dll"
#define FLUIDSYNTHLIB2	"libfluidsynth.dll"
#else
#define FLUIDSYNTHLIB1	"fluidsynth64.dll"
#define FLUIDSYNTHLIB2	"libfluidsynth64.dll"
#endif
#else
#include <dlfcn.h>

#ifdef __APPLE__
#define FLUIDSYNTHLIB1	"libfluidsynth.1.dylib"
#define FLUIDSYNTHLIB2	"libfluidsynth.2.dylib"
#else // !__APPLE__
#define FLUIDSYNTHLIB1	"libfluidsynth.so.1"
#define FLUIDSYNTHLIB2	"libfluidsynth.so.2"
#endif // __APPLE__
#endif

#endif


// TYPES -------------------------------------------------------------------

// EXTERNAL FUNCTION PROTOTYPES --------------------------------------------

const char *BaseFileSearch(const char *file, const char *ext, bool lookfirstinprogdir = false);

// PUBLIC FUNCTION PROTOTYPES ----------------------------------------------

// PRIVATE FUNCTION PROTOTYPES ---------------------------------------------

// EXTERNAL DATA DECLARATIONS ----------------------------------------------

// PRIVATE DATA DEFINITIONS ------------------------------------------------

// PUBLIC DATA DEFINITIONS -------------------------------------------------

// CODE --------------------------------------------------------------------

//==========================================================================
//
// FluidSynthMIDIDevice Constructor
//
//==========================================================================

FluidSynthMIDIDevice::FluidSynthMIDIDevice(int samplerate, std::vector<std::string> &config, int (*printfunc_)(const char*, ...) = nullptr)
	: SoftSynthMIDIDevice(samplerate <= 0? fluidConfig.fluid_samplerate : samplerate, 22050, 96000)
{
	StreamBlockSize = 4;

	printfunc = printfunc_;
	FluidSynth = NULL;
	FluidSettings = NULL;
#ifdef DYN_FLUIDSYNTH
	if (!LoadFluidSynth(fluidConfig.fluid_lib.c_str()))
	{
		throw std::runtime_error("Failed to load FluidSynth.\n");
	}
#endif
	int major = 0, minor = 0, micro = 0;
	fluid_version(&major, &minor, &micro);

	if (major < 2)
	{
		// FluidSynth 1.x: fluid_settings_...() functions return 1 on success and 0 otherwise
		FluidSettingsResultOk = 1;
		FluidSettingsResultFailed = 0;
	}

	FluidSettings = new_fluid_settings();
	if (FluidSettings == NULL)
	{
		throw std::runtime_error("Failed to create FluidSettings.\n");
	}
	fluid_settings_setnum(FluidSettings, "synth.sample-rate", SampleRate);
	fluid_settings_setnum(FluidSettings, "synth.gain", fluidConfig.fluid_gain);
	fluid_settings_setint(FluidSettings, "synth.reverb.active", fluidConfig.fluid_reverb);
	fluid_settings_setint(FluidSettings, "synth.chorus.active", fluidConfig.fluid_chorus);
	fluid_settings_setint(FluidSettings, "synth.polyphony", fluidConfig.fluid_voices);
	fluid_settings_setint(FluidSettings, "synth.cpu-cores", fluidConfig.fluid_threads);
	FluidSynth = new_fluid_synth(FluidSettings);
	if (FluidSynth == NULL)
	{
		delete_fluid_settings(FluidSettings);
		throw std::runtime_error("Failed to create FluidSynth.\n");
	}
	fluid_synth_set_interp_method(FluidSynth, -1, fluidConfig.fluid_interp);
	fluid_synth_set_reverb(FluidSynth, fluidConfig.fluid_reverb_roomsize, fluidConfig.fluid_reverb_damping,
		fluidConfig.fluid_reverb_width, fluidConfig.fluid_reverb_level);
	fluid_synth_set_chorus(FluidSynth, fluidConfig.fluid_chorus_voices, fluidConfig.fluid_chorus_level,
		fluidConfig.fluid_chorus_speed, fluidConfig.fluid_chorus_depth, fluidConfig.fluid_chorus_type);

	// try loading a patch set that got specified with $mididevice.

	if (LoadPatchSets(config))
	{
		return;
	}

	delete_fluid_settings(FluidSettings);
	delete_fluid_synth(FluidSynth);
	FluidSynth = nullptr;
	FluidSettings = nullptr;
	throw std::runtime_error("Failed to load any MIDI patches.\n");

}


//==========================================================================
//
// FluidSynthMIDIDevice Destructor
//
//==========================================================================

FluidSynthMIDIDevice::~FluidSynthMIDIDevice()
{
	Close();
	if (FluidSynth != NULL)
	{
		delete_fluid_synth(FluidSynth);
	}
	if (FluidSettings != NULL)
	{
		delete_fluid_settings(FluidSettings);
	}
#ifdef DYN_FLUIDSYNTH
	UnloadFluidSynth();
#endif
}

//==========================================================================
//
// FluidSynthMIDIDevice :: Open
//
// Returns 0 on success.
//
//==========================================================================

int FluidSynthMIDIDevice::OpenRenderer()
{
	fluid_synth_system_reset(FluidSynth);
	return 0;
}

//==========================================================================
//
// FluidSynthMIDIDevice :: HandleEvent
//
// Translates a MIDI event into FluidSynth calls.
//
//==========================================================================

void FluidSynthMIDIDevice::HandleEvent(int status, int parm1, int parm2)
{
	int command = status & 0xF0;
	int channel = status & 0x0F;
	
	switch (command)
	{
	case MIDI_NOTEOFF:
		fluid_synth_noteoff(FluidSynth, channel, parm1);
		break;

	case MIDI_NOTEON:
		fluid_synth_noteon(FluidSynth, channel, parm1, parm2);
		break;

	case MIDI_POLYPRESS:
		break;

	case MIDI_CTRLCHANGE:
		fluid_synth_cc(FluidSynth, channel, parm1, parm2);
		break;

	case MIDI_PRGMCHANGE:
		fluid_synth_program_change(FluidSynth, channel, parm1);
		break;

	case MIDI_CHANPRESS:
		fluid_synth_channel_pressure(FluidSynth, channel, parm1);
		break;

	case MIDI_PITCHBEND:
		fluid_synth_pitch_bend(FluidSynth, channel, (parm1 & 0x7f) | ((parm2 & 0x7f) << 7));
		break;
	}
}

//==========================================================================
//
// FluidSynthMIDIDevice :: HandleLongEvent
//
// Handle SysEx messages.
//
//==========================================================================

void FluidSynthMIDIDevice::HandleLongEvent(const uint8_t *data, int len)
{
	if (len > 1 && (data[0] == 0xF0 || data[0] == 0xF7))
	{
		fluid_synth_sysex(FluidSynth, (const char *)data + 1, len - 1, NULL, NULL, NULL, 0);
	}
}

//==========================================================================
//
// FluidSynthMIDIDevice :: ComputeOutput
//
//==========================================================================

void FluidSynthMIDIDevice::ComputeOutput(float *buffer, int len)
{
	fluid_synth_write_float(FluidSynth, len,
		buffer, 0, 2,
		buffer, 1, 2);
}

//==========================================================================
//
// FluidSynthMIDIDevice :: LoadPatchSets
//
//==========================================================================

int FluidSynthMIDIDevice::LoadPatchSets(const std::vector<std::string> &config)
{
	int count = 0;
	for (auto& file : config)
	{
		if (FLUID_FAILED != fluid_synth_sfload(FluidSynth, file.c_str(), count == 0))
		{
			//DPrintf(DMSG_NOTIFY, "Loaded patch set %s.\n", tok);
			count++;
		}
		else
		{
			if (printfunc) printfunc("Failed to load patch set %s.\n", file.c_str());
		}
	}
	return count;
}

//==========================================================================
//
// FluidSynthMIDIDevice :: ChangeSettingInt
//
// Changes an integer setting.
//
//==========================================================================

void FluidSynthMIDIDevice::ChangeSettingInt(const char *setting, int value)
{
	if (FluidSynth == nullptr || FluidSettings == nullptr || strncmp(setting, "fluidsynth.", 11))
	{
		return;
	}
	setting += 11;

	if (strcmp(setting, "synth.interpolation") == 0)
	{
		if (FLUID_OK != fluid_synth_set_interp_method(FluidSynth, -1, value))
		{
			if (printfunc) printfunc("Setting interpolation method %d failed.\n", value);
		}
	}
	else if (strcmp(setting, "synth.polyphony") == 0)
	{
		if (FLUID_OK != fluid_synth_set_polyphony(FluidSynth, value))
		{
			if (printfunc) printfunc("Setting polyphony to %d failed.\n", value);
		}
	}
	else if (FluidSettingsResultFailed == fluid_settings_setint(FluidSettings, setting, value))
	{
		if (printfunc) printfunc("Failed to set %s to %d.\n", setting, value);
	}
	// fluid_settings_setint succeeded; update these settings in the running synth, too
	else if (strcmp(setting, "synth.reverb.active") == 0)
	{
		fluid_synth_set_reverb_on(FluidSynth, value);
	}
	else if (strcmp(setting, "synth.chorus.active") == 0)
	{
		fluid_synth_set_chorus_on(FluidSynth, value);
	}
}

//==========================================================================
//
// FluidSynthMIDIDevice :: ChangeSettingNum
//
// Changes a numeric setting.
//
//==========================================================================

void FluidSynthMIDIDevice::ChangeSettingNum(const char *setting, double value)
{
	if (FluidSynth == nullptr || FluidSettings == nullptr || strncmp(setting, "fluidsynth.", 11))
	{
		return;
	}
	setting += 11;

	if (strcmp(setting, "z.reverb") == 0)
	{
		fluid_synth_set_reverb(FluidSynth, fluidConfig.fluid_reverb_roomsize, fluidConfig.fluid_reverb_damping, fluidConfig.fluid_reverb_width, fluidConfig.fluid_reverb_level);
	}
	else if (strcmp(setting, "z.chorus") == 0)
	{
		fluid_synth_set_chorus(FluidSynth, fluidConfig.fluid_chorus_voices, fluidConfig.fluid_chorus_level, fluidConfig.fluid_chorus_speed, fluidConfig.fluid_chorus_depth, fluidConfig.fluid_chorus_type);
	}
	else if (FluidSettingsResultFailed == fluid_settings_setnum(FluidSettings, setting, value))
	{
		if (printfunc) printfunc("Failed to set %s to %g.\n", setting, value);
	}

}

//==========================================================================
//
// FluidSynthMIDIDevice :: ChangeSettingString
//
// Changes a string setting.
//
//==========================================================================

void FluidSynthMIDIDevice::ChangeSettingString(const char *setting, const char *value)
{
	if (FluidSynth == nullptr || FluidSettings == nullptr || strncmp(setting, "fluidsynth.", 11))
	{
		return;
	}
	setting += 11;

	if (FluidSettingsResultFailed == fluid_settings_setstr(FluidSettings, setting, value))
	{
		if (printfunc) printfunc("Failed to set %s to %s.\n", setting, value);
	}
}

//==========================================================================
//
// FluidSynthMIDIDevice :: GetStats
//
//==========================================================================

std::string FluidSynthMIDIDevice::GetStats()
{
	if (FluidSynth == NULL || FluidSettings == NULL)
	{
		return "FluidSynth is invalid";
	}

	int polyphony = fluid_synth_get_polyphony(FluidSynth);
	int voices = fluid_synth_get_active_voice_count(FluidSynth);
	double load = fluid_synth_get_cpu_load(FluidSynth);
	int chorus, reverb, maxpoly;
	fluid_settings_getint(FluidSettings, "synth.chorus.active", &chorus);
	fluid_settings_getint(FluidSettings, "synth.reverb.active", &reverb);
	fluid_settings_getint(FluidSettings, "synth.polyphony", &maxpoly);

	char out[100];
	snprintf(out, 100,"Voices: %3d/%3d(%3d) %6.2f%% CPU   Reverb: %3s Chorus: %3s",
		voices, polyphony, maxpoly, load, reverb ? "yes" : "no", chorus ? "yes" : "no");
	return out;
}

#ifdef DYN_FLUIDSYNTH

//==========================================================================
//
// FluidSynthMIDIDevice :: LoadFluidSynth
//
// Returns true if the FluidSynth library was successfully loaded.
//
//==========================================================================

FModuleMaybe<DYN_FLUIDSYNTH> FluidSynthModule{"FluidSynth"};

#define DYN_FLUID_SYM(x) decltype(FluidSynthMIDIDevice::x) FluidSynthMIDIDevice::x{#x}
DYN_FLUID_SYM(fluid_version);
DYN_FLUID_SYM(new_fluid_settings);
DYN_FLUID_SYM(new_fluid_synth);
DYN_FLUID_SYM(delete_fluid_synth);
DYN_FLUID_SYM(delete_fluid_settings);
DYN_FLUID_SYM(fluid_settings_setnum);
DYN_FLUID_SYM(fluid_settings_setstr);
DYN_FLUID_SYM(fluid_settings_setint);
DYN_FLUID_SYM(fluid_settings_getint);
DYN_FLUID_SYM(fluid_synth_set_reverb_on);
DYN_FLUID_SYM(fluid_synth_set_chorus_on);
DYN_FLUID_SYM(fluid_synth_set_interp_method);
DYN_FLUID_SYM(fluid_synth_set_polyphony);
DYN_FLUID_SYM(fluid_synth_get_polyphony);
DYN_FLUID_SYM(fluid_synth_get_active_voice_count);
DYN_FLUID_SYM(fluid_synth_get_cpu_load);
DYN_FLUID_SYM(fluid_synth_system_reset);
DYN_FLUID_SYM(fluid_synth_noteon);
DYN_FLUID_SYM(fluid_synth_noteoff);
DYN_FLUID_SYM(fluid_synth_cc);
DYN_FLUID_SYM(fluid_synth_program_change);
DYN_FLUID_SYM(fluid_synth_channel_pressure);
DYN_FLUID_SYM(fluid_synth_pitch_bend);
DYN_FLUID_SYM(fluid_synth_write_float);
DYN_FLUID_SYM(fluid_synth_sfload);
DYN_FLUID_SYM(fluid_synth_set_reverb);
DYN_FLUID_SYM(fluid_synth_set_chorus);
DYN_FLUID_SYM(fluid_synth_sysex);

bool FluidSynthMIDIDevice::LoadFluidSynth(const char *fluid_lib)
{
	if (fluid_lib && strlen(fluid_lib) > 0)
	{
		if(!FluidSynthModule.Load({fluid_lib}))
		{
			const char* libname = fluid_lib;
			if (printfunc) printfunc("Could not load %s\n", libname);
		}
		else
			return true;
	}

	if(!FluidSynthModule.Load({FLUIDSYNTHLIB1, FLUIDSYNTHLIB2}))
	{
		if (printfunc) printfunc("Could not load " FLUIDSYNTHLIB1 " or " FLUIDSYNTHLIB2 "\n");
		return false;
	}

	return true;
}

//==========================================================================
//
// FluidSynthMIDIDevice :: UnloadFluidSynth
//
//==========================================================================

void FluidSynthMIDIDevice::UnloadFluidSynth()
{
	FluidSynthModule.Unload();
}

#endif


//==========================================================================
//
// sndfile
//
//==========================================================================


#ifdef _WIN32
// do this without including windows.h for this one single prototype
extern "C" unsigned __stdcall GetSystemDirectoryA(char* lpBuffer, unsigned uSize);
#endif // _WIN32

void Fluid_SetupConfig(const char* patches, std::vector<std::string> &patch_paths, bool systemfallback)
{
	if (*patches == 0) patches = fluidConfig.fluid_patchset.c_str();

	//Resolve the paths here, the renderer will only get a final list of file names.

	if (musicCallbacks.PathForSoundfont)
	{
		auto info = musicCallbacks.PathForSoundfont(patches, SF_SF2);
		if (info) patches = info;
	}

	int count;
	char* wpatches = strdup(patches);
	char* tok;
#ifdef _WIN32
	const char* const delim = ";";
#else
	const char* const delim = ":";
#endif

	if (wpatches != NULL)
	{
		tok = strtok(wpatches, delim);
		count = 0;
		while (tok != NULL)
		{
			std::string path;
#ifdef _WIN32
			// If the path does not contain any path separators, automatically
			// prepend $PROGDIR to the path.
			if (strcspn(tok, ":/\\") == strlen(tok))
			{
				path = module_progdir + "/" + tok;
			}
			else
#endif
			{
				path = tok;
			}
			if (musicCallbacks.NicePath)
				path = musicCallbacks.NicePath(path.c_str());

			if (MusicIO::fileExists(path.c_str()))
			{
				patch_paths.push_back(path);
			}
			else
			{
				if (musicCallbacks.Fluid_MessageFunc)
					musicCallbacks.Fluid_MessageFunc("Could not find patch set %s.\n", tok);
			}
			tok = strtok(NULL, delim);
		}
		free(wpatches);
		if (patch_paths.size() > 0) return;
	}

	if (systemfallback)
	{
		// The following will only be used if no soundfont at all is provided, i.e. even the standard one coming with GZDoom is missing.
#ifdef __unix__
		// This is the standard location on Ubuntu.
		Fluid_SetupConfig("/usr/share/sounds/sf2/FluidR3_GS.sf2:/usr/share/sounds/sf2/FluidR3_GM.sf2", patch_paths, false);
#endif
#ifdef _WIN32
		// On Windows, look for the 4 megabyte patch set installed by Creative's drivers as a default.
		char sysdir[260 + sizeof("\\CT4MGM.SF2")];
		uint32_t filepart;
		if (0 != (filepart = GetSystemDirectoryA(sysdir, 260)))
		{
			strcat(sysdir, "\\CT4MGM.SF2");
			if (MusicIO::fileExists(sysdir))
			{
				patch_paths.push_back(sysdir);
				return;
			}
			// Try again with CT2MGM.SF2
			sysdir[filepart + 3] = '2';
			if (MusicIO::fileExists(sysdir))
			{
				patch_paths.push_back(sysdir);
				return;
			}
		}

#endif

	}
}

//==========================================================================
//
//
//
//==========================================================================

MIDIDevice *CreateFluidSynthMIDIDevice(int samplerate, const char *Args)
{
	std::vector<std::string> fluid_patchset;

	Fluid_SetupConfig(Args, fluid_patchset, true);
	return new FluidSynthMIDIDevice(samplerate, fluid_patchset, musicCallbacks.Fluid_MessageFunc);
}

#endif // HAVE_FLUIDSYNTH