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/* $Id$ */
/***
This file is part of polypaudio.
polypaudio 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 of the License,
or (at your option) any later version.
polypaudio 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 Lesser General Public License
along with polypaudio; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
USA.
***/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <stdio.h>
#include <assert.h>
#include <unistd.h>
#include <string.h>
#include <stdlib.h>
#include <errno.h>
#include <fcntl.h>
#include <linux/input.h>
#include "module.h"
#include "log.h"
#include "module-mmkbd-evdev-symdef.h"
#include "namereg.h"
#include "sink.h"
#include "xmalloc.h"
#include "modargs.h"
#include "util.h"
PA_MODULE_AUTHOR("Lennart Poettering")
PA_MODULE_DESCRIPTION("Multimedia keyboard support via Linux evdev")
PA_MODULE_VERSION(PACKAGE_VERSION)
PA_MODULE_USAGE("device=<evdev device> sink=<sink name>")
#define DEFAULT_DEVICE "/dev/input/event0"
static const char* const valid_modargs[] = {
"device",
"sink",
NULL,
};
struct userdata {
int fd;
struct pa_io_event *io;
char *sink_name;
struct pa_module *module;
float mute_toggle_save;
};
static void io_callback(struct pa_mainloop_api *io, struct pa_io_event *e, int fd, enum pa_io_event_flags events, void*userdata) {
struct userdata *u = userdata;
assert(io);
assert(u);
if (events & (PA_IO_EVENT_HANGUP|PA_IO_EVENT_ERROR)) {
pa_log(__FILE__": lost connection to evdev device.\n");
goto fail;
}
if (events & PA_IO_EVENT_INPUT) {
struct input_event e;
if (pa_loop_read(u->fd, &e, sizeof(e)) <= 0) {
pa_log(__FILE__": failed to read from event device: %s\n", strerror(errno));
goto fail;
}
if (e.type == EV_KEY && (e.value == 1 || e.value == 2)) {
enum { INVALID, UP, DOWN, MUTE_TOGGLE } volchange = INVALID;
pa_log_debug(__FILE__": key code=%u, value=%u\n", e.code, e.value);
switch (e.code) {
case KEY_VOLUMEDOWN: volchange = DOWN; break;
case KEY_VOLUMEUP: volchange = UP; break;
case KEY_MUTE: volchange = MUTE_TOGGLE; break;
}
if (volchange != INVALID) {
struct pa_sink *s;
if (!(s = pa_namereg_get(u->module->core, u->sink_name, PA_NAMEREG_SINK, 1)))
pa_log(__FILE__": failed to get sink '%s'\n", u->sink_name);
else {
double v = pa_volume_to_user(s->volume);
switch (volchange) {
case UP: v += .05; break;
case DOWN: v -= .05; break;
case MUTE_TOGGLE: {
if (v > 0) {
u->mute_toggle_save = v;
v = 0;
} else
v = u->mute_toggle_save;
}
default:
;
}
pa_sink_set_volume(s, pa_volume_from_user(v));
}
}
}
}
return;
fail:
u->module->core->mainloop->io_free(u->io);
u->io = NULL;
pa_module_unload_request(u->module);
}
#define test_bit(bit, array) (array[bit/8] & (1<<(bit%8)))
int pa__init(struct pa_core *c, struct pa_module*m) {
struct pa_modargs *ma = NULL;
struct userdata *u;
int version;
struct input_id input_id;
char name[256];
uint8_t evtype_bitmask[EV_MAX/8 + 1];
assert(c && m);
if (!(ma = pa_modargs_new(m->argument, valid_modargs))) {
pa_log(__FILE__": Failed to parse module arguments\n");
goto fail;
}
m->userdata = u = pa_xmalloc(sizeof(struct userdata));
u->module = m;
u->io = NULL;
u->sink_name = pa_xstrdup(pa_modargs_get_value(ma, "sink", NULL));
u->fd = -1;
u->mute_toggle_save = 0;
if ((u->fd = open(pa_modargs_get_value(ma, "device", DEFAULT_DEVICE), O_RDONLY)) < 0) {
pa_log(__FILE__": failed to open evdev device: %s\n", strerror(errno));
goto fail;
}
if (ioctl(u->fd, EVIOCGVERSION, &version) < 0) {
pa_log(__FILE__": EVIOCGVERSION failed: %s\n", strerror(errno));
goto fail;
}
pa_log_info(__FILE__": evdev driver version %i.%i.%i\n", version >> 16, (version >> 8) & 0xff, version & 0xff);
if(ioctl(u->fd, EVIOCGID, &input_id)) {
pa_log(__FILE__": EVIOCGID failed: %s\n", strerror(errno));
goto fail;
}
pa_log_info(__FILE__": evdev vendor 0x%04hx product 0x%04hx version 0x%04hx bustype %u\n",
input_id.vendor, input_id.product, input_id.version, input_id.bustype);
if(ioctl(u->fd, EVIOCGNAME(sizeof(name)), name) < 0) {
pa_log(__FILE__": EVIOCGNAME failed: %s\n", strerror(errno));
goto fail;
}
pa_log_info(__FILE__": evdev device name: %s\n", name);
memset(evtype_bitmask, 0, sizeof(evtype_bitmask));
if (ioctl(u->fd, EVIOCGBIT(0, EV_MAX), evtype_bitmask) < 0) {
pa_log(__FILE__": EVIOCGBIT failed: %s\n", strerror(errno));
goto fail;
}
if (!test_bit(EV_KEY, evtype_bitmask)) {
pa_log(__FILE__": device has no keys.\n");
goto fail;
}
u->io = c->mainloop->io_new(c->mainloop, u->fd, PA_IO_EVENT_INPUT|PA_IO_EVENT_HANGUP, io_callback, u);
pa_modargs_free(ma);
return 0;
fail:
if (ma)
pa_modargs_free(ma);
pa__done(c, m);
return -1;
}
void pa__done(struct pa_core *c, struct pa_module*m) {
struct userdata *u;
assert(c);
assert(m);
if (!(u = m->userdata))
return;
if (u->io)
m->core->mainloop->io_free(u->io);
if (u->fd >= 0)
close(u->fd);
pa_xfree(u->sink_name);
pa_xfree(u);
}
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