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/*
HaikuMidi.cpp:
Haiku real-time MIDI handling for Csound5
Copyright (C) 2012-2019 Peter J. Goodeve
This file is part of Csound.
The Csound Library is free software; you can redistribute it
and/or modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
Csound is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with Csound; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA
*/
#include <malloc.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <signal.h>
#include <Locker.h>
#include <MidiRoster.h>
#include <MidiProducer.h>
#include <MidiConsumer.h>
#include "haiku_midi.h"
#define XDPRINTF(x)
#define DPRINTF(x)
//#define DPRINTF(x) printf x
//////////////////////////////////////////////////////////
class MidiInHandler : public BMidiLocalConsumer
{
friend class MidiIn;
MidiIn * param;
public:
MidiInHandler(MidiIn * mp, const char * name=NULL)
: BMidiLocalConsumer(name), param(mp), nextevent(0) {
midi_in_sem = create_sem(0, "midi input");
}
~MidiInHandler() {
delete_sem(midi_in_sem);
}
void NoteOff(uchar channel,
uchar note,
uchar velocity,
bigtime_t time);
void NoteOn(uchar channel,
uchar note,
uchar velocity,
bigtime_t time);
void KeyPressure(uchar channel,
uchar note,
uchar pressure,
bigtime_t time);
void ControlChange(uchar channel,
uchar controlNumber,
uchar controlValue,
bigtime_t time);
void ProgramChange(uchar channel,
uchar programNumber,
bigtime_t time);
void ChannelPressure(uchar channel,
uchar pressure,
bigtime_t time);
void PitchBend(uchar channel,
uchar lsb,
uchar msb,
bigtime_t time);
void SystemExclusive(void* data,
size_t dataLength,
bigtime_t time);
void SystemCommon(uchar statusByte,
uchar data1,
uchar data2,
bigtime_t time);
void SystemRealTime(uchar statusByte, bigtime_t time);
void midiEventIn(MidiEvent &s, bigtime_t time);
void midiSysExIn(void *data, size_t size, bigtime_t time);
uint32 nextevent;
sem_id midi_in_sem; // to be waited on by MIDI loop (w. timeout)
};
//////////////////////////////////////////////////////////
void MidiInHandler::NoteOff(uchar channel,
uchar note,
uchar velocity,
bigtime_t time)
{
MidiEvent s(3, 0x80|channel, note, velocity);
midiEventIn(s, time);
}
void MidiInHandler::NoteOn(uchar channel,
uchar note,
uchar velocity,
bigtime_t time)
{
MidiEvent s(3, 0x90|channel, note, velocity);
midiEventIn(s, time);
}
void MidiInHandler::KeyPressure(uchar channel,
uchar note,
uchar pressure,
bigtime_t time)
{
MidiEvent s(3, 0xA0|channel, note, pressure);
midiEventIn(s, time);
}
void MidiInHandler::ControlChange(uchar channel,
uchar controlNumber,
uchar controlValue,
bigtime_t time)
{
MidiEvent s(3, 0xB0|channel, controlNumber, controlValue);
midiEventIn(s, time);
}
void MidiInHandler::ProgramChange(uchar channel,
uchar programNumber,
bigtime_t time)
{
MidiEvent s(2, 0xC0|channel, programNumber);
midiEventIn(s, time);
}
void MidiInHandler::ChannelPressure(uchar channel,
uchar pressure,
bigtime_t time)
{
MidiEvent s(2, 0xD0|channel, pressure);
midiEventIn(s, time);
}
void MidiInHandler::PitchBend(uchar channel,
uchar lsb,
uchar msb,
bigtime_t time)
{
MidiEvent s(3, 0xE0|channel, lsb, msb);
midiEventIn(s, time);
}
void MidiInHandler::SystemExclusive(void* data,
size_t dataLength,
bigtime_t time)
{
midiSysExIn(data, dataLength, time);
}
void MidiInHandler::SystemCommon(uchar statusByte,
uchar data1,
uchar data2,
bigtime_t time)
{
// Ignored for the moment (size varies...)
}
void MidiInHandler::SystemRealTime(uchar statusByte, bigtime_t time)
{
MidiEvent s(3, statusByte);
midiEventIn(s, time);
}
/////////////////////////////////////////
// Called by MidiInHandler input functions...:
void MidiInHandler::midiEventIn(MidiEvent &s, bigtime_t time)
{
nextevent = s;
acquire_sem_etc(midi_in_sem, 1, B_RELATIVE_TIMEOUT, 1000000);
}
void MidiInHandler::midiSysExIn(void *data, size_t size, bigtime_t time)
{
// completely ignored (for now anyway...)
}
//////////////////////////////////////////////////////////
static BMidiProducer *FindProducer(const char *name)
{
if (!name || !*name) return NULL; // just being safe...
BMidiProducer *object;
int32 id = 0;
DPRINTF(("looking for endpoint %s\n", name);)
if (*name == '?') {
fprintf(stderr,
"\n===========================\nAvailable MIDI Sources:\n");
while(object = BMidiRoster::NextProducer(&id)){
fprintf(stderr, " %s\n", object->Name());
object->Release();
}
fprintf(stderr, "===========================\n\n");
}
else while(object = BMidiRoster::NextProducer(&id)){
DPRINTF(("checking endpoint %p %s\n", object, object->Name());)
if(!strcmp(object->Name(),name)) {
return object;
}
object->Release();
}
return NULL;
}
MidiIn::MidiIn(const char *name) :
nodename(name), extSource(NULL), handler(NULL)
{
if (!name || !*name) return; // empty name -- don't publish
extSource = FindProducer(name);
if (*name == '?') return; // was just a query
if (extSource) {
DPRINTF(("Connecting to external Producer %s\n", name);)
handler = new MidiInHandler(this); // anonymous endpoint
if (extSource->Connect(handler) != B_OK) {
extSource = NULL;
handler->Release();
handler = NULL;
fprintf(stderr, "Failed to connect to %s!!\n", name);
}
else
fprintf(stderr, "Connected to MIDI source %s\n", name);
extSource->Release(); // our extra hold...
} else {
DPRINTF(("Registering as Consumer %s\n", name);)
handler = new MidiInHandler(this, name);
BMidiRoster::Register(handler); // needs error check!
DPRINTF(("Published OK -- thread %lx\n", find_thread(NULL));)
fprintf(stderr, "Providing MIDI Input %s\n", name);
}
}
MidiIn::~MidiIn()
{
if (handler) {
DPRINTF(("Unregistering %s\n", nodename? nodename : "<NULL>");)
handler->Release();
DPRINTF(("handler %p released\n", handler);)
if (!handler->param->extSource) BMidiRoster::Unregister(handler);
handler = NULL;
DPRINTF(("Unregistered... handler now %p\n", handler);)
}
DPRINTF(("Unpublished OK -- thread %lx\n", find_thread(NULL));)
}
uint32 MidiIn::GetEvent() {
uint32 ev = handler->nextevent;
if (!handler) return 0;
if (ev != 0) {
handler->nextevent = 0;
release_sem(handler->midi_in_sem);
}
return ev;
}
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