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/*
* Copyright (C) 2024 Mark Hills <mark@xwax.org>
*
* This file is part of "xwax".
*
* "xwax" is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License, version 3 as
* published by the Free Software Foundation.
*
* "xwax" 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
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <https://www.gnu.org/licenses/>.
*
*/
#include <assert.h>
#include "controller.h"
#include "deck.h"
#include "debug.h"
#define ARRAY_SIZE(x) (sizeof(x) / sizeof(*x))
int controller_init(struct controller *c, struct controller_ops *ops,
void *local, struct rt *rt)
{
debug("%p", c);
c->fault = false;
c->ops = ops;
c->local = local;
return rt_add_controller(rt, c);
}
void controller_clear(struct controller *c)
{
debug("%p", c);
c->ops->clear(c);
}
/*
* Add a deck to this controller, if possible
*/
void controller_add_deck(struct controller *c, struct deck *d)
{
debug("%p adding deck %p", c, d);
if (c->ops->add_deck(c, d) == 0) {
debug("deck was added");
assert(d->ncontrol < ARRAY_SIZE(d->control)); /* FIXME: report error */
d->control[d->ncontrol++] = c; /* for callbacks */
}
}
/*
* Get file descriptors which should be polled for this controller
*
* Important on systems where only callback-based audio devices
* (eg. JACK) are used. We need to return some descriptors so
* that the realtime thread runs.
*
* Return: the number of pollfd filled, or -1 on error
*/
ssize_t controller_pollfds(struct controller *c, struct pollfd *pe, size_t z)
{
if (c->ops->pollfds != NULL)
return c->ops->pollfds(c, pe, z);
else
return 0;
}
void controller_handle(struct controller *c)
{
if (c->fault)
return;
if (c->ops->realtime(c) != 0) {
c->fault = true;
fputs("Error handling hardware controller; disabling it\n", stderr);
}
}
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