music_fluidsynth_mididevice.cpp

/*
** 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 "i_musicinterns.h"
#include "i_system.h"
#include "v_text.h"
#include "cmdlib.h"
#include "i_soundfont.h"
#include "doomerrors.h"

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

#ifndef 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(const char *args, int samplerate);
	~FluidSynthMIDIDevice();
	
	int Open(MidiCallback, void *userdata);
	FString GetStats();
	void FluidSettingInt(const char *setting, int value);
	void FluidSettingNum(const char *setting, double value);
	void FluidSettingStr(const char *setting, const char *value);
	int GetDeviceType() const override { return MDEV_FLUIDSYNTH; }
	
protected:
	void HandleEvent(int status, int parm1, int parm2);
	void HandleLongEvent(const uint8_t *data, int len);
	void ComputeOutput(float *buffer, int len);
	int LoadPatchSets(const char *patches);
	
	fluid_settings_t *FluidSettings;
	fluid_synth_t *FluidSynth;
	
#ifdef DYN_FLUIDSYNTH
	enum { FLUID_FAILED = -1, FLUID_OK = 0 };
	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();
	void UnloadFluidSynth();
#endif
};

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

#ifdef DYN_FLUIDSYNTH

#ifdef _WIN32

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

#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"
#else // !__APPLE__
#define FLUIDSYNTHLIB1	"libfluidsynth.so.1"
#endif // __APPLE__
#endif

#define FLUID_REVERB_DEFAULT_ROOMSIZE 0.2f
#define FLUID_REVERB_DEFAULT_DAMP 0.0f
#define FLUID_REVERB_DEFAULT_WIDTH 0.5f
#define FLUID_REVERB_DEFAULT_LEVEL 0.9f

#define FLUID_CHORUS_MOD_SINE		0
#define FLUID_CHORUS_MOD_TRIANGLE	1

#define FLUID_CHORUS_DEFAULT_N 3
#define FLUID_CHORUS_DEFAULT_LEVEL 2.0f
#define FLUID_CHORUS_DEFAULT_SPEED 0.3f
#define FLUID_CHORUS_DEFAULT_DEPTH 8.0f
#define FLUID_CHORUS_DEFAULT_TYPE FLUID_CHORUS_MOD_SINE

#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 -------------------------------------------------

CVAR(String, fluid_lib, "", CVAR_ARCHIVE|CVAR_GLOBALCONFIG)

CUSTOM_CVAR(String, fluid_patchset, "gzdoom", CVAR_ARCHIVE | CVAR_GLOBALCONFIG)
{
	if (currSong != nullptr && currSong->GetDeviceType() == MDEV_FLUIDSYNTH)
	{
		MIDIDeviceChanged(-1, true);
	}
}

CUSTOM_CVAR(Float, fluid_gain, 0.5, CVAR_ARCHIVE|CVAR_GLOBALCONFIG)
{
	if (self < 0)
		self = 0;
	else if (self > 10)
		self = 10;
	else if (currSong != NULL)
		currSong->FluidSettingNum("synth.gain", self);
}

CUSTOM_CVAR(Bool, fluid_reverb, false, CVAR_ARCHIVE|CVAR_GLOBALCONFIG)
{
	if (currSong != NULL)
		currSong->FluidSettingInt("synth.reverb.active", self);
}

CUSTOM_CVAR(Bool, fluid_chorus, false, CVAR_ARCHIVE|CVAR_GLOBALCONFIG)
{
	if (currSong != NULL)
		currSong->FluidSettingInt("synth.chorus.active", self);
}

CUSTOM_CVAR(Int, fluid_voices, 128, CVAR_ARCHIVE|CVAR_GLOBALCONFIG)
{
	if (self < 16)
		self = 16;
	else if (self > 4096)
		self = 4096;
	else if (currSong != NULL)
		currSong->FluidSettingInt("synth.polyphony", self);
}

CUSTOM_CVAR(Int, fluid_interp, 1, CVAR_ARCHIVE|CVAR_GLOBALCONFIG)
{
	// Values are: 0 = FLUID_INTERP_NONE
	//             1 = FLUID_INTERP_LINEAR
	//             4 = FLUID_INTERP_4THORDER (the FluidSynth default)
	//             7 = FLUID_INTERP_7THORDER
	// (And here I thought it was just a linear list.)
	// Round undefined values to the nearest valid one.
	if (self < 0)
		self = 0;
	else if (self == 2)
		self = 1;
	else if (self == 3 || self == 5)
		self = 4;
	else if (self == 6 || self > 7)
		self = 7;
	else if (currSong != NULL)
		currSong->FluidSettingInt("synth.interpolation", self);
}

CVAR(Int, fluid_samplerate, 0, CVAR_ARCHIVE|CVAR_GLOBALCONFIG)

// I don't know if this setting even matters for us, since we aren't letting
// FluidSynth drives its own output.
CUSTOM_CVAR(Int, fluid_threads, 1, CVAR_ARCHIVE|CVAR_GLOBALCONFIG)
{
	if (self < 1)
		self = 1;
	else if (self > 256)
		self = 256;
}

CUSTOM_CVAR(Float, fluid_reverb_roomsize, 0.61f, CVAR_ARCHIVE|CVAR_GLOBALCONFIG)
{
	if (self < 0)
		self = 0;
	else if (self > 1.2f)
		self = 1.2f;
	else if (currSong != NULL)
		currSong->FluidSettingInt("z.reverb-changed", 0);
}

CUSTOM_CVAR(Float, fluid_reverb_damping, 0.23f, CVAR_ARCHIVE|CVAR_GLOBALCONFIG)
{
	if (self < 0)
		self = 0;
	else if (self > 1)
		self = 1;
	else if (currSong != NULL)
		currSong->FluidSettingInt("z.reverb-changed", 0);
}

CUSTOM_CVAR(Float, fluid_reverb_width, 0.76f, CVAR_ARCHIVE|CVAR_GLOBALCONFIG)
{
	if (self < 0)
		self = 0;
	else if (self > 100)
		self = 100;
	else if (currSong != NULL)
		currSong->FluidSettingInt("z.reverb-changed", 0);
}

CUSTOM_CVAR(Float, fluid_reverb_level, 0.57f, CVAR_ARCHIVE|CVAR_GLOBALCONFIG)
{
	if (self < 0)
		self = 0;
	else if (self > 1)
		self = 1;
	else if (currSong != NULL)
		currSong->FluidSettingInt("z.reverb-changed", 0);
}

CUSTOM_CVAR(Int, fluid_chorus_voices, 3, CVAR_ARCHIVE|CVAR_GLOBALCONFIG)
{
	if (self < 0)
		self = 0;
	else if (self > 99)
		self = 99;
	else if (currSong != NULL)
		currSong->FluidSettingInt("z.chorus-changed", 0);
}

CUSTOM_CVAR(Float, fluid_chorus_level, 1.2f, CVAR_ARCHIVE|CVAR_GLOBALCONFIG)
{
	if (self < 0)
		self = 0;
	else if (self > 1)
		self = 1;
	else if (currSong != NULL)
		currSong->FluidSettingInt("z.chorus-changed", 0);
}

CUSTOM_CVAR(Float, fluid_chorus_speed, 0.3f, CVAR_ARCHIVE|CVAR_GLOBALCONFIG)
{
	if (self < 0.29f)
		self = 0.29f;
	else if (self > 5)
		self = 5;
	else if (currSong != NULL)
		currSong->FluidSettingInt("z.chorus-changed", 0);
}

// depth is in ms and actual maximum depends on the sample rate
CUSTOM_CVAR(Float, fluid_chorus_depth, 8, CVAR_ARCHIVE|CVAR_GLOBALCONFIG)
{
	if (self < 0)
		self = 0;
	else if (self > 21)
		self = 21;
	else if (currSong != NULL)
		currSong->FluidSettingInt("z.chorus-changed", 0);
}

CUSTOM_CVAR(Int, fluid_chorus_type, FLUID_CHORUS_DEFAULT_TYPE, CVAR_ARCHIVE|CVAR_GLOBALCONFIG)
{
	if (self != FLUID_CHORUS_MOD_SINE && self != FLUID_CHORUS_MOD_TRIANGLE)
		self = FLUID_CHORUS_DEFAULT_TYPE;
	else if (currSong != NULL)
		currSong->FluidSettingInt("z.chorus-changed", 0);
}

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

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

FluidSynthMIDIDevice::FluidSynthMIDIDevice(const char *args, int samplerate)
	: SoftSynthMIDIDevice(samplerate <= 0? fluid_samplerate : samplerate, 22050, 96000)
{
	FluidSynth = NULL;
	FluidSettings = NULL;
#ifdef DYN_FLUIDSYNTH
	if (!LoadFluidSynth())
	{
		return;
	}
#endif
	FluidSettings = new_fluid_settings();
	if (FluidSettings == NULL)
	{
		printf("Failed to create FluidSettings.\n");
		return;
	}
	fluid_settings_setnum(FluidSettings, "synth.sample-rate", SampleRate);
	fluid_settings_setnum(FluidSettings, "synth.gain", fluid_gain);
	fluid_settings_setint(FluidSettings, "synth.reverb.active", fluid_reverb);
	fluid_settings_setint(FluidSettings, "synth.chorus.active", fluid_chorus);
	fluid_settings_setint(FluidSettings, "synth.polyphony", fluid_voices);
	fluid_settings_setint(FluidSettings, "synth.cpu-cores", fluid_threads);
	FluidSynth = new_fluid_synth(FluidSettings);
	if (FluidSynth == NULL)
	{
		Printf("Failed to create FluidSynth.\n");
		return;
	}
	fluid_synth_set_interp_method(FluidSynth, -1, fluid_interp);
	fluid_synth_set_reverb(FluidSynth, fluid_reverb_roomsize, fluid_reverb_damping,
		fluid_reverb_width, fluid_reverb_level);
	fluid_synth_set_chorus(FluidSynth, fluid_chorus_voices, fluid_chorus_level,
		fluid_chorus_speed, fluid_chorus_depth, fluid_chorus_type);

	// try loading a patch set that got specified with $mididevice.
	int res = 0;
	if (args != NULL && *args != 0)
	{
		if (LoadPatchSets(args)) return;
	}

	if (LoadPatchSets(fluid_patchset))
	{
		return;
	}

	// 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.
	if (LoadPatchSets("/usr/share/sounds/sf2/FluidR3_GS.sf2:/usr/share/sounds/sf2/FluidR3_GM.sf2"))
	{
		return;
	}
#endif
#ifdef _WIN32
	// On Windows, look for the 4 megabyte patch set installed by Creative's drivers as a default.
	char sysdir[MAX_PATH + sizeof("\\CT4MGM.SF2")];
	uint32_t filepart;
	if (0 != (filepart = GetSystemDirectoryA(sysdir, MAX_PATH)))
	{
		strcat(sysdir, "\\CT4MGM.SF2");
		if (LoadPatchSets(sysdir))
		{
			return;
		}
		// Try again with CT2MGM.SF2
		sysdir[filepart + 3] = '2';
		if (LoadPatchSets(sysdir))
		{
			return;
		}
	}

#endif

	delete_fluid_synth(FluidSynth);
	FluidSynth = NULL;
	I_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::Open(MidiCallback callback, void *userdata)
{
	if (FluidSynth == NULL)
	{
		return 2;
	}
	int ret = OpenStream(4, 0, callback, userdata);
	if (ret == 0)
	{
		fluid_synth_system_reset(FluidSynth);
	}
	return ret;
}

//==========================================================================
//
// 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
//
// Loads a delimiter-separated list of patch sets. This delimiter matches
// that of the PATH environment variable. On Windows, it is ';'. On other
// systems, it is ':'. Returns the number of patch sets loaded.
//
//==========================================================================

int FluidSynthMIDIDevice::LoadPatchSets(const char *patches)
{
	auto info = sfmanager.FindSoundFont(patches, SF_SF2);
	if (info != nullptr) patches = info->mFilename.GetChars();

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

	if (wpatches == NULL)
	{
		return 0;
	}
	tok = strtok(wpatches, delim);
	count = 0;
	while (tok != NULL)
	{
		FString path;
#ifdef _WIN32
		// If the path does not contain any path separators, automatically
		// prepend $PROGDIR to the path.
		if (strcspn(tok, ":/\\") == strlen(tok))
		{
			path << "$PROGDIR/" << tok;
			path = NicePath(path);
		}
		else
#endif
		{
			path = NicePath(tok);
		}
		if (FileExists(path))
		{
			if (FLUID_FAILED != fluid_synth_sfload(FluidSynth, path, count == 0))
			{
				DPrintf(DMSG_NOTIFY, "Loaded patch set %s.\n", tok);
				count++;
			}
			else
			{
				DPrintf(DMSG_ERROR, "Failed to load patch set %s.\n", tok);
			}
		}
		else
		{
			DPrintf(DMSG_ERROR, "Could not find patch set %s.\n", tok);
		}
		tok = strtok(NULL, delim);
	}
	free(wpatches);
	return count;
}

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

void FluidSynthMIDIDevice::FluidSettingInt(const char *setting, int value)
{
	if (FluidSynth == NULL || FluidSettings == NULL)
	{
		return;
	}

	if (strcmp(setting, "synth.interpolation") == 0)
	{
		if (FLUID_OK != fluid_synth_set_interp_method(FluidSynth, -1, value))
		{
			Printf("Setting interpolation method %d failed.\n", value);
		}
	}
	else if (strcmp(setting, "synth.polyphony") == 0)
	{
		if (FLUID_OK != fluid_synth_set_polyphony(FluidSynth, value))
		{
			Printf("Setting polyphony to %d failed.\n", value);
		}
	}
	else if (strcmp(setting, "z.reverb-changed") == 0)
	{
		fluid_synth_set_reverb(FluidSynth, fluid_reverb_roomsize, fluid_reverb_damping,
			fluid_reverb_width, fluid_reverb_level);
	}
	else if (strcmp(setting, "z.chorus-changed") == 0)
	{
		fluid_synth_set_chorus(FluidSynth, fluid_chorus_voices, fluid_chorus_level,
			fluid_chorus_speed, fluid_chorus_depth, fluid_chorus_type);
	}
	else if (0 == fluid_settings_setint(FluidSettings, setting, value))
	{
		Printf("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 :: FluidSettingNum
//
// Changes a numeric setting.
//
//==========================================================================

void FluidSynthMIDIDevice::FluidSettingNum(const char *setting, double value)
{
	if (FluidSettings != NULL)
	{
		if (0 == fluid_settings_setnum(FluidSettings, setting, value))
		{
			Printf("Failed to set %s to %g.\n", setting, value);
		}
	}
}

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

void FluidSynthMIDIDevice::FluidSettingStr(const char *setting, const char *value)
{
	if (FluidSettings != NULL)
	{
		if (0 == fluid_settings_setstr(FluidSettings, setting, value))
		{
			Printf("Failed to set %s to %s.\n", setting, value);
		}
	}
}

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

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

	std::lock_guard<std::mutex> lock(CritSec);
	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);

	out.Format("Voices: " TEXTCOLOR_YELLOW "%3d" TEXTCOLOR_NORMAL "/" TEXTCOLOR_ORANGE "%3d" TEXTCOLOR_NORMAL "(" TEXTCOLOR_RED "%3d" TEXTCOLOR_NORMAL ")"
			   TEXTCOLOR_YELLOW "%6.2f" TEXTCOLOR_NORMAL "%% CPU   "
			   "Reverb: " TEXTCOLOR_YELLOW "%3s" TEXTCOLOR_NORMAL
			   " Chorus: " TEXTCOLOR_YELLOW "%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(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()
{
	if (strlen(fluid_lib) > 0)
	{
		if(!FluidSynthModule.Load({fluid_lib}))
		{
			const char* libname = fluid_lib;
			Printf(TEXTCOLOR_RED "Could not load %s\n", libname);
		}
		else
			return true;
	}

#ifdef FLUIDSYNTHLIB2
	if(!FluidSynthModule.Load({FLUIDSYNTHLIB1, FLUIDSYNTHLIB2}))
	{
		Printf(TEXTCOLOR_RED "Could not load " FLUIDSYNTHLIB1 " or " FLUIDSYNTHLIB2 "\n");
		return false;
	}
#else
	if(!FluidSynthModule.Load({fluid_lib, FLUIDSYNTHLIB1}))
	{
		Printf(TEXTCOLOR_RED "Could not load " FLUIDSYNTHLIB1 ": %s\n", dlerror());
		return false;
	}
#endif
	return true;
}

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

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

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

MIDIDevice *CreateFluidSynthMIDIDevice(const char *args, int samplerate)
{
	return new FluidSynthMIDIDevice(args, samplerate);
}

#endif