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//=========================================================
// MusE
// Linux Music Editor
// $Id: metronom.cpp,v 1.3 2005/11/16 17:55:59 wschweer Exp $
//
// metronom - midi metronom
//
// (C) Copyright 2005 Werner Schweer (ws@seh.de)
//=========================================================
#include "metronomgui.h"
#include "metronom.h"
#include "midi.h"
#include "midievent.h"
//---------------------------------------------------------
// Metronom
//---------------------------------------------------------
Metronom::Metronom(const char* name, const MempiHost* h)
: Mempi(name, h)
{
gui = 0;
}
//---------------------------------------------------------
// Metronom
//---------------------------------------------------------
Metronom::~Metronom()
{
if (gui)
delete gui;
}
//---------------------------------------------------------
// init
//---------------------------------------------------------
bool Metronom::init()
{
nextTick = 0;
lastTo = 0;
data.measureNote = 63;
data.measureVelo = 127;
data.beatNote = 63;
data.beatVelo = 70;
gui = new MetronomGui(this, 0);
gui->hide();
gui->setWindowTitle(QString(name()));
return false;
}
//---------------------------------------------------------
// getGeometry
//---------------------------------------------------------
void Metronom::getGeometry(int* x, int* y, int* w, int* h) const
{
QPoint pos(gui->pos());
QSize size(gui->size());
*x = pos.x();
*y = pos.y();
*w = size.width();
*h = size.height();
}
//---------------------------------------------------------
// setGeometry
//---------------------------------------------------------
void Metronom::setGeometry(int x, int y, int w, int h)
{
gui->resize(QSize(w, h));
gui->move(QPoint(x, y));
}
//---------------------------------------------------------
// process
//---------------------------------------------------------
void Metronom::process(unsigned from, unsigned to, MidiEventList* /*il*/, MidiEventList* ol)
{
if (from == to) {
nextTick = 0;
return;
}
if (lastTo != from) { // seek?
// printf(" seek? %d-%d\n", lastTo, from);
nextTick = 0;
}
lastTo = to;
if (nextTick > to)
return;
while (nextTick < to) {
int bar, beat;
unsigned tick;
if (nextTick < from) {
host->bar(from, &bar, &beat, &tick);
if (tick)
nextTick = host->bar2tick(bar, beat+1, 0);
else
nextTick = from;
}
host->bar(nextTick, &bar, &beat, &tick);
bool isMeasure = beat == 0;
MidiEvent ev(nextTick, 0, ME_NOTEON, data.beatNote, data.beatVelo);
if (isMeasure) {
ev.setA(data.measureNote);
ev.setB(data.measureVelo);
}
ol->insert(ev); // insert note on
ev.setB(0);
ev.setTime(nextTick + 10);
ev.setB(0);
ol->insert(ev); // insert note off
nextTick = host->bar2tick(bar, beat+1, 0);
}
}
//---------------------------------------------------------
// getInitData
//---------------------------------------------------------
void Metronom::getInitData(int* n, const unsigned char** p) const
{
*n = sizeof(data);
*p = (unsigned char*)&data;
}
//---------------------------------------------------------
// setInitData
//---------------------------------------------------------
void Metronom::setInitData(int n, const unsigned char* p)
{
memcpy((void*)&data, p, n);
if (gui)
gui->init();
}
//---------------------------------------------------------
// inst
//---------------------------------------------------------
static Mempi* instantiate(const char* name, const MempiHost* h)
{
return new Metronom(name, h);
}
extern "C" {
static MEMPI descriptor = {
"Metronom",
"MusE Simple Midi Metronom",
"0.1", // version string
MEMPI_GENERATOR,
MEMPI_MAJOR_VERSION, MEMPI_MINOR_VERSION,
instantiate
};
const MEMPI* mempi_descriptor() { return &descriptor; }
}
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