cog/Plugins/MIDI/MIDI/MT32Player.cpp

#include "MT32Player.h"

#include <stdio.h>

MT32Player::MT32Player(bool gm, unsigned gm_set)
: bGM(gm), uGMSet(gm_set), MIDIPlayer() {
	_synth = NULL;
	controlRom = NULL;
	pcmRom = NULL;
	controlRomFile = NULL;
	pcmRomFile = NULL;
}

MT32Player::~MT32Player() {
	if(_synth) {
		_synth->close();
		delete _synth;
	}
	if(controlRom) {
		MT32Emu::ROMImage::freeROMImage(controlRom);
	}
	if(pcmRom) {
		MT32Emu::ROMImage::freeROMImage(pcmRom);
	}
	delete controlRomFile;
	delete pcmRomFile;
}

void MT32Player::send_event(uint32_t b) {
	if(!(b & 0x80000000)) {
		_synth->playMsg(b);
	} else {
		uint32_t n = b & 0xffffff;
		const uint8_t *data;
		size_t size, port;
		mSysexMap.get_entry(n, data, size, port);
		_synth->playSysex(data, (MT32Emu::Bit32u)size);
	}
}

void MT32Player::render(float *out, unsigned long count) {
	_synth->render(out, (MT32Emu::Bit32u)count);
}

void MT32Player::setBasePath(const char *in) {
	sBasePath = in;
	shutdown();
}

void MT32Player::shutdown() {
	if(_synth) {
		_synth->close();
		delete _synth;
	}
	if(controlRom) {
		MT32Emu::ROMImage::freeROMImage(controlRom);
	}
	if(pcmRom) {
		MT32Emu::ROMImage::freeROMImage(pcmRom);
	}
	delete controlRomFile;
	delete pcmRomFile;
	_synth = 0;
	controlRom = 0;
	pcmRom = 0;
	controlRomFile = 0;
	pcmRomFile = 0;
}

static const char *control_rom_names[] = { "CM32L_CONTROL.ROM", "MT32_CONTROL.ROM" };
static const char *pcm_rom_names[] = { "CM32L_PCM.ROM", "MT32_PCM.ROM" };

bool MT32Player::startup() {
	if(_synth) return true;

	unsigned rom_set = 0;
	controlRomFile = openFile(control_rom_names[0]);
	if(!controlRomFile) {
		rom_set = 1;
		controlRomFile = openFile(control_rom_names[1]);
	}
	if(!controlRomFile) return false;
	pcmRomFile = openFile(pcm_rom_names[rom_set]);
	if(!pcmRomFile) return false;
	controlRom = MT32Emu::ROMImage::makeROMImage(controlRomFile);
	if(!controlRom) return false;
	pcmRom = MT32Emu::ROMImage::makeROMImage(pcmRomFile);
	if(!pcmRom) return false;
	_synth = new MT32Emu::Synth;
	if(!_synth->open(*controlRom, *pcmRom, bGM ? 256 : 32, MT32Emu::AnalogOutputMode_COARSE, bGM)) {
		delete _synth;
		_synth = 0;
		return false;
	}
	reset();
	return true;
}

void MT32Player::reset() {
	static const uint8_t mt32_reset[10] = { 0xF0, MT32Emu::SYSEX_MANUFACTURER_ROLAND, 0x10, MT32Emu::SYSEX_MDL_MT32, MT32Emu::SYSEX_CMD_DT1, 0x7F, 0, 0, 0xF7 };

	_synth->playSysex(mt32_reset, sizeof(mt32_reset));

	if(bGM) {
#include "kq6mtgm.h"
#include "mtgm.h"
#ifndef _countof
#define _countof(a) ((sizeof((a))) / (sizeof((a[0]))))
#endif
		const unsigned char *start, *end;
		if(uGMSet == 0) {
			start = mt32_gm_sysex;
			end = start + _countof(mt32_gm_sysex);
		} else {
			start = kq6_mt32_gm_sysex;
			end = start + _countof(kq6_mt32_gm_sysex);
		}
		while(start < end) {
			const unsigned char *sequence_end = start;
			while(sequence_end < end && *sequence_end != 0xF7) sequence_end++;
			_synth->playSysex(start, (MT32Emu::Bit32u)(sequence_end - start + 1));
			start = sequence_end + 1;
		}
	}
}

class StdFile : public MT32Emu::File {
	public:
	StdFile() {
		data = NULL;
	}
	~StdFile() {
		close();
	}

	bool open(const char *filename) {
		FILE *f = fopen(filename, "rb");
		if(f) {
			fseek(f, 0, SEEK_END);
			fileSize = ftell(f);
			fseek(f, 0, SEEK_SET);
			data = new unsigned char[fileSize];
			fread(data, fileSize, 1, f);
			fclose(f);
			return true;
		}
		return false;
	}

	void close() {
		delete[] data;
		data = NULL;
	}

	size_t getSize() {
		return fileSize;
	}
	const unsigned char *getData() {
		return data;
	}
};

MT32Emu::File *MT32Player::openFile(const char *filename) {
	StdFile *ret = new StdFile;
	std::string path = sBasePath;
	path += filename;
	if(!ret->open(path.c_str())) {
		delete ret;
		ret = 0;
	}
	return ret;
}