gzdoom-gles/libraries/zmusic/mididevices/music_timiditypp_mididevice.cpp

/*
** music_timiditypp_mididevice.cpp
** Provides access to timidity.exe
**
**---------------------------------------------------------------------------
** Copyright 2001-2017 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.
**---------------------------------------------------------------------------
**
*/

#include "mididevice.h"
#include <vector>

#include "timiditypp/timidity.h"
#include "timiditypp/instrum.h"
#include "timiditypp/playmidi.h"




class TimidityPPMIDIDevice : public SoftSynthMIDIDevice
{
	std::shared_ptr<TimidityPlus::Instruments> instruments;
public:
	TimidityPPMIDIDevice(TimidityConfig *config, int samplerate);
	~TimidityPPMIDIDevice();

	int OpenRenderer();
	void PrecacheInstruments(const uint16_t *instruments, int count);
	//std::string GetStats();
	int GetDeviceType() const override { return MDEV_TIMIDITY; }

	double test[3] = { 0, 0, 0 };

protected:
	TimidityPlus::Player *Renderer;

	void HandleEvent(int status, int parm1, int parm2);
	void HandleLongEvent(const uint8_t *data, int len);
	void ComputeOutput(float *buffer, int len);
	void LoadInstruments(TimidityConfig* config);
};

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

void TimidityPPMIDIDevice::LoadInstruments(TimidityConfig* config)
{
	if (config->reader)
	{
		config->loadedConfig = config->readerName;
		config->instruments.reset(new TimidityPlus::Instruments());
		bool success = config->instruments->load(config->reader);
		config->reader = nullptr;

		if (!success)
		{
			config->instruments.reset();
			config->loadedConfig = "";
			throw std::runtime_error("Unable to initialize instruments for Timidity++ MIDI device");
		}
	}
	else if (config->instruments == nullptr)
	{
		throw std::runtime_error("No instruments set for Timidity++ device");
	}
	instruments = config->instruments;
}

//==========================================================================
//
// TimidityPPMIDIDevice Constructor
//
//==========================================================================

TimidityPPMIDIDevice::TimidityPPMIDIDevice(TimidityConfig *config, int samplerate) 
	:SoftSynthMIDIDevice(samplerate, 4000, 65000)
{
	TimidityPlus::set_playback_rate(SampleRate);
	LoadInstruments(config);
	Renderer = new TimidityPlus::Player(instruments.get());
}

//==========================================================================
//
// TimidityPPMIDIDevice Destructor
//
//==========================================================================

TimidityPPMIDIDevice::~TimidityPPMIDIDevice ()
{
	Close();
	if (Renderer != nullptr)
	{
		delete Renderer;
	}
}

//==========================================================================
//
// TimidityPPMIDIDevice :: Open
//
//==========================================================================

int TimidityPPMIDIDevice::OpenRenderer()
{
	Renderer->playmidi_stream_init();
	return 0;
}

//==========================================================================
//
// TimidityPPMIDIDevice :: PrecacheInstruments
//
// Each entry is packed as follows:
//   Bits 0- 6: Instrument number
//   Bits 7-13: Bank number
//   Bit    14: Select drum set if 1, tone bank if 0
//
//==========================================================================

void TimidityPPMIDIDevice::PrecacheInstruments(const uint16_t *instrumentlist, int count)
{
	if (instruments != nullptr)
		instruments->PrecacheInstruments(instrumentlist, count);
}

//==========================================================================
//
// TimidityPPMIDIDevice :: HandleEvent
//
//==========================================================================

void TimidityPPMIDIDevice::HandleEvent(int status, int parm1, int parm2)
{
	if (Renderer != nullptr)
		Renderer->send_event(status, parm1, parm2);
}

//==========================================================================
//
// TimidityPPMIDIDevice :: HandleLongEvent
//
//==========================================================================

void TimidityPPMIDIDevice::HandleLongEvent(const uint8_t *data, int len)
{
	if (Renderer != nullptr)
		Renderer->send_long_event(data, len);
}

//==========================================================================
//
// TimidityPPMIDIDevice :: ComputeOutput
//
//==========================================================================

void TimidityPPMIDIDevice::ComputeOutput(float *buffer, int len)
{
	if (Renderer != nullptr)
		Renderer->compute_data(buffer, len);
}

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

MIDIDevice *CreateTimidityPPMIDIDevice(TimidityConfig* config, int samplerate)
{
	return new TimidityPPMIDIDevice(config, samplerate);
}


void TimidityPP_Shutdown()
{
	TimidityPlus::free_gauss_table();
	TimidityPlus::free_global_mblock();
}