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/*
* mainloop.c - main loop
* Copyright (c) Clemens Ladisch <clemens@ladisch.de>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 2 of the License, or
* (at your option) any later version.
*
* This program 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 <http://www.gnu.org/licenses/>.
*/
#include "aconfig.h"
#include <stdio.h>
#include <stdlib.h>
#include <errno.h>
#include <poll.h>
#include <panel.h>
#include <alsa/asoundlib.h>
#include "mem.h"
#include "die.h"
#include "colors.h"
#include "widget.h"
#include "mixer_widget.h"
#include "mixer_display.h"
#include "mainloop.h"
static WINDOW *curses_initialized;
static void black_hole_error_handler(const char *file, int line,
const char *function, int err,
const char *fmt, ...)
{
}
void initialize_curses(bool use_color)
{
curses_initialized = initscr();
cbreak();
noecho();
#ifdef HAVE_CURSES_ESCDELAY
set_escdelay(100);
#endif
window_size_changed(); /* update screen_lines/cols */
init_colors(use_color);
snd_lib_error_set_handler(black_hole_error_handler);
}
void shutdown(void)
{
if (curses_initialized) {
clear();
refresh();
curs_set(1);
endwin();
}
mixer_shutdown();
}
void mainloop(void)
{
struct pollfd *pollfds = NULL;
int nfds = 0, n;
struct widget *active_widget;
unsigned short revents;
int key;
int err;
for (;;) {
update_panels();
doupdate();
active_widget = get_active_widget();
if (!active_widget)
break;
n = 1 + snd_mixer_poll_descriptors_count(mixer);
if (n != nfds) {
free(pollfds);
nfds = n;
pollfds = ccalloc(nfds, sizeof *pollfds);
pollfds[0].fd = fileno(stdin);
pollfds[0].events = POLLIN;
}
err = snd_mixer_poll_descriptors(mixer, &pollfds[1], nfds - 1);
if (err < 0)
fatal_alsa_error("cannot get poll descriptors", err);
n = poll(pollfds, nfds, -1);
if (n < 0) {
if (errno == EINTR) {
pollfds[0].revents = 0;
doupdate(); /* handle SIGWINCH */
} else {
fatal_error("poll error");
}
}
if (pollfds[0].revents & (POLLERR | POLLHUP | POLLNVAL))
break;
if (pollfds[0].revents & POLLIN)
--n;
if (n > 0) {
err = snd_mixer_poll_descriptors_revents(mixer, &pollfds[1], nfds - 1, &revents);
if (err < 0)
fatal_alsa_error("cannot get poll events", err);
if (revents & (POLLERR | POLLNVAL))
close_mixer_device();
else if (revents & POLLIN)
snd_mixer_handle_events(mixer);
}
key = wgetch(active_widget->window);
while (key != ERR) {
#ifdef KEY_RESIZE
if (key == KEY_RESIZE)
window_size_changed();
else
#endif
active_widget->handle_key(key);
active_widget = get_active_widget();
if (!active_widget)
break;
key = wgetch(active_widget->window);
}
if (!active_widget)
break;
if (controls_changed)
display_controls();
}
free(pollfds);
}
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