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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 "log.h"
#include "prefs.h"
#include "async_wait.h"
#include "notes.h"
#include "fm.h"
struct NoteDeviceStruct {
unsigned int channelNumber;
};
static NoteDevice *
fmConstruct (int errorLevel) {
NoteDevice *device;
if ((device = malloc(sizeof(*device)))) {
if (fmEnablePorts(errorLevel)) {
if (fmTestCard(errorLevel)) {
device->channelNumber = 0;
logMessage(LOG_DEBUG, "FM enabled");
return device;
}
fmDisablePorts();
}
free(device);
} else {
logMallocError();
}
logMessage(LOG_DEBUG, "FM not available");
return NULL;
}
static void
fmDestruct (NoteDevice *device) {
free(device);
fmDisablePorts();
logMessage(LOG_DEBUG, "FM disabled");
}
static int
fmTone (NoteDevice *device, unsigned int duration, NoteFrequency frequency) {
uint32_t pitch = frequency;
logMessage(LOG_DEBUG, "tone: MSecs:%u Freq:%"PRIu32,
duration, pitch);
if (pitch) {
fmPlayTone(device->channelNumber, pitch, duration, prefs.fmVolume);
} else {
asyncWait(duration);
}
return 1;
}
static int
fmNote (NoteDevice *device, unsigned int duration, unsigned char note) {
return fmTone(device, duration, getNoteFrequency(note));
}
static int
fmFlush (NoteDevice *device) {
return 1;
}
const NoteMethods fmNoteMethods = {
.construct = fmConstruct,
.destruct = fmDestruct,
.tone = fmTone,
.note = fmNote,
.flush = fmFlush
};
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