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/*
* BRLTTY - A background process providing access to the console screen (when in
* text mode) for a blind person using a refreshable braille display.
*
* Copyright (C) 1995-2024 by The BRLTTY Developers.
*
* BRLTTY comes with ABSOLUTELY NO WARRANTY.
*
* This is free software, placed 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. Please see the file LICENSE-LGPL for details.
*
* Web Page: http://brltty.app/
*
* This software is maintained by Dave Mielke <dave@mielke.cc>.
*/
#include "prologue.h"
#include <string.h>
#include <errno.h>
#include "prefs.h"
#include "log.h"
#include "midi.h"
#include "notes.h"
char *opt_midiDevice;
struct NoteDeviceStruct {
MidiDevice *midi;
int channelNumber;
};
static NoteDevice *
midiConstruct (int errorLevel) {
NoteDevice *device;
if ((device = malloc(sizeof(*device)))) {
if ((device->midi = openMidiDevice(errorLevel, opt_midiDevice))) {
device->channelNumber = 0;
setMidiInstrument(device->midi, device->channelNumber, prefs.midiInstrument);
logMessage(LOG_DEBUG, "MIDI enabled");
return device;
}
free(device);
} else {
logMallocError();
}
logMessage(LOG_DEBUG, "MIDI not available");
return NULL;
}
static void
midiDestruct (NoteDevice *device) {
closeMidiDevice(device->midi);
free(device);
logMessage(LOG_DEBUG, "MIDI disabled");
}
static int
midiNote (NoteDevice *device, unsigned int duration, unsigned char note) {
logMessage(LOG_DEBUG, "tone: MSecs:%u Note:%u", duration, note);
beginMidiBlock(device->midi);
if (note) {
startMidiNote(device->midi, device->channelNumber, note, prefs.midiVolume);
insertMidiWait(device->midi, duration);
stopMidiNote(device->midi, device->channelNumber);
} else {
insertMidiWait(device->midi, duration);
}
endMidiBlock(device->midi);
return 1;
}
static int
midiTone (NoteDevice *device, unsigned int duration, NoteFrequency frequency) {
return midiNote(device, duration, getNearestNote(frequency));
}
static int
midiFlush (NoteDevice *device) {
return flushMidiDevice(device->midi);
}
const NoteMethods midiNoteMethods = {
.construct = midiConstruct,
.destruct = midiDestruct,
.tone = midiTone,
.note = midiNote,
.flush = midiFlush
};
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