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//=========================================================
// MusE
// Linux Music Editor
// $Id: mess.cpp,v 1.2 2004/04/15 13:46:18 wschweer Exp $
// (C) Copyright 2004 Werner Schweer (ws@seh.de)
//=========================================================
#include "mess.h"
#include "muse/midi.h"
#include "muse/midictrl.h"
static const int FIFO_SIZE = 32;
//---------------------------------------------------------
// MessP
//---------------------------------------------------------
struct MessP {
// Event Fifo synti -> Host:
MidiPlayEvent fifo[FIFO_SIZE];
volatile int fifoSize;
int fifoWindex;
int fifoRindex;
};
//---------------------------------------------------------
// Mess
//---------------------------------------------------------
Mess::Mess(int n)
{
_channels = n;
_sampleRate = 44100;
d = new MessP;
d->fifoSize = 0;
d->fifoWindex = 0;
d->fifoRindex = 0;
}
//---------------------------------------------------------
// Mess
//---------------------------------------------------------
Mess::~Mess()
{
delete d;
}
//---------------------------------------------------------
// getGeometry
// dummy
//---------------------------------------------------------
void Mess::getGeometry(int* x, int* y, int* w, int* h) const
{
x = 0;
y = 0;
w = 0;
h = 0;
}
//---------------------------------------------------------
// sendEvent
// send Event synti -> host
//---------------------------------------------------------
void Mess::sendEvent(MidiPlayEvent ev)
{
if (d->fifoSize == FIFO_SIZE) {
printf("event synti->host fifo overflow\n");
return;
}
d->fifo[d->fifoWindex] = ev;
d->fifoWindex = (d->fifoWindex + 1) % FIFO_SIZE;
++(d->fifoSize);
}
//---------------------------------------------------------
// receiveEvent
// called from host
//---------------------------------------------------------
MidiPlayEvent Mess::receiveEvent()
{
MidiPlayEvent ev = d->fifo[d->fifoRindex];
d->fifoRindex = (d->fifoRindex + 1) % FIFO_SIZE;
--(d->fifoSize);
return ev;
}
//---------------------------------------------------------
// eventsPending
// called from host:
// while (eventsPending()) {
// receiveEvent();
// ...
//---------------------------------------------------------
int Mess::eventsPending() const
{
return d->fifoSize;
}
//---------------------------------------------------------
// processEvent
// return true if synti is busy
//---------------------------------------------------------
bool Mess::processEvent(const MidiPlayEvent& ev)
{
switch(ev.type()) {
case ME_NOTEON:
return playNote(ev.channel(), ev.dataA(), ev.dataB());
case ME_NOTEOFF:
return playNote(ev.channel(), ev.dataA(), 0);
case ME_SYSEX:
return sysex(ev.len(), ev.data());
case ME_CONTROLLER:
return setController(ev.channel(), ev.dataA(), ev.dataB());
case ME_PITCHBEND: // Tim.
return setController(ev.channel(), CTRL_PITCH, ev.dataA());
}
return false;
}
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