diff options
Diffstat (limited to 'src/modules/module-mmkbd-evdev.c')
| -rw-r--r-- | src/modules/module-mmkbd-evdev.c | 250 |
1 files changed, 250 insertions, 0 deletions
diff --git a/src/modules/module-mmkbd-evdev.c b/src/modules/module-mmkbd-evdev.c new file mode 100644 index 00000000..b60f786d --- /dev/null +++ b/src/modules/module-mmkbd-evdev.c @@ -0,0 +1,250 @@ +/* $Id$ */ + +/*** + 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 <polypcore/module.h> +#include <polypcore/log.h> +#include <polypcore/namereg.h> +#include <polypcore/sink.h> +#include <polypcore/xmalloc.h> +#include <polypcore/modargs.h> +#include <polypcore/util.h> + +#include "module-mmkbd-evdev-symdef.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" + +/* + * This isn't defined in older kernel headers and there is no way of + * detecting it. + */ +struct _input_id { + __u16 bustype; + __u16 vendor; + __u16 product; + __u16 version; +}; + +static const char* const valid_modargs[] = { + "device", + "sink", + NULL, +}; + +struct userdata { + int fd; + pa_io_event *io; + char *sink_name; + pa_module *module; + float mute_toggle_save; +}; + +static void io_callback(pa_mainloop_api *io, PA_GCC_UNUSED pa_io_event *e, PA_GCC_UNUSED int fd, pa_io_event_flags_t 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 ev; + + if (pa_loop_read(u->fd, &ev, sizeof(ev)) <= 0) { + pa_log(__FILE__": failed to read from event device: %s\n", strerror(errno)); + goto fail; + } + + if (ev.type == EV_KEY && (ev.value == 1 || ev.value == 2)) { + enum { INVALID, UP, DOWN, MUTE_TOGGLE } volchange = INVALID; + + pa_log_debug(__FILE__": key code=%u, value=%u\n", ev.code, ev.value); + + switch (ev.code) { + case KEY_VOLUMEDOWN: volchange = DOWN; break; + case KEY_VOLUMEUP: volchange = UP; break; + case KEY_MUTE: volchange = MUTE_TOGGLE; break; + } + + if (volchange != INVALID) { + 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 { + pa_volume_t v = pa_cvolume_avg(pa_sink_get_volume(s, PA_MIXER_HARDWARE)); + pa_cvolume cv; +#define DELTA (PA_VOLUME_NORM/20) + + switch (volchange) { + case UP: + v += DELTA; + break; + + case DOWN: + if (v > DELTA) + v -= DELTA; + else + v = PA_VOLUME_MUTED; + + break; + + case MUTE_TOGGLE: { + + if (v > 0) { + u->mute_toggle_save = v; + v = PA_VOLUME_MUTED; + } else + v = u->mute_toggle_save; + } + default: + ; + } + + pa_cvolume_set(&cv, PA_CHANNELS_MAX, v); + pa_sink_set_volume(s, PA_MIXER_HARDWARE, &cv); + } + } + } + } + + 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(pa_core *c, pa_module*m) { + 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(pa_core *c, 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); +} |