/*** This file is part of PulseAudio. Copyright 2005-2006 Lennart Poettering PulseAudio 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 2.1 of the License, or (at your option) any later version. PulseAudio 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 PulseAudio; if not, see . ***/ #ifdef HAVE_CONFIG_H #include #endif #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #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_LOAD_ONCE(false); PA_MODULE_USAGE("device= sink= volume_limit= volume_step="); #define DEFAULT_DEVICE "/dev/input/event0" static const char* const valid_modargs[] = { "device", "sink", "volume_limit", "volume_step", NULL, }; struct userdata { int fd, fd_type; pa_io_event *io; char *sink_name; pa_module *module; pa_volume_t volume_limit; pa_volume_t volume_step; }; static void io_callback(pa_mainloop_api *io, pa_io_event *e, int fd, pa_io_event_flags_t events, void*userdata) { struct userdata *u = userdata; pa_assert(io); pa_assert(u); if (events & (PA_IO_EVENT_HANGUP|PA_IO_EVENT_ERROR)) { pa_log("Lost connection to evdev device."); goto fail; } if (events & PA_IO_EVENT_INPUT) { struct input_event ev; if (pa_loop_read(u->fd, &ev, sizeof(ev), &u->fd_type) <= 0) { pa_log("Failed to read from event device: %s", pa_cstrerror(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("Key code=%u, value=%u", 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))) pa_log("Failed to get sink '%s'", u->sink_name); else { pa_cvolume cv = *pa_sink_get_volume(s, false); switch (volchange) { case UP: pa_cvolume_inc_clamp(&cv, u->volume_step, u->volume_limit); pa_sink_set_volume(s, &cv, true, true); break; case DOWN: pa_cvolume_dec(&cv, u->volume_step); pa_sink_set_volume(s, &cv, true, true); break; case MUTE_TOGGLE: pa_sink_set_mute(s, !pa_sink_get_mute(s, false), true); break; case INVALID: pa_assert_not_reached(); } } } } } return; fail: u->module->core->mainloop->io_free(u->io); u->io = NULL; pa_module_unload_request(u->module, true); } #define test_bit(bit, array) (array[bit/8] & (1<<(bit%8))) int pa__init(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]; pa_volume_t volume_limit = PA_VOLUME_NORM*3/2; pa_volume_t volume_step = PA_VOLUME_NORM/20; pa_assert(m); if (!(ma = pa_modargs_new(m->argument, valid_modargs))) { pa_log("Failed to parse module arguments"); goto fail; } if (pa_modargs_get_value_u32(ma, "volume_limit", &volume_limit) < 0) { pa_log("Failed to parse volume limit"); goto fail; } if (pa_modargs_get_value_u32(ma, "volume_step", &volume_step) < 0) { pa_log("Failed to parse volume step"); goto fail; } m->userdata = u = pa_xnew(struct userdata, 1); u->module = m; u->io = NULL; u->sink_name = pa_xstrdup(pa_modargs_get_value(ma, "sink", NULL)); u->fd = -1; u->fd_type = 0; u->volume_limit = PA_CLAMP_VOLUME(volume_limit); u->volume_step = PA_CLAMP_VOLUME(volume_step); if ((u->fd = pa_open_cloexec(pa_modargs_get_value(ma, "device", DEFAULT_DEVICE), O_RDONLY, 0)) < 0) { pa_log("Failed to open evdev device: %s", pa_cstrerror(errno)); goto fail; } if (ioctl(u->fd, EVIOCGVERSION, &version) < 0) { pa_log("EVIOCGVERSION failed: %s", pa_cstrerror(errno)); goto fail; } pa_log_info("evdev driver version %i.%i.%i", version >> 16, (version >> 8) & 0xff, version & 0xff); if (ioctl(u->fd, EVIOCGID, &input_id)) { pa_log("EVIOCGID failed: %s", pa_cstrerror(errno)); goto fail; } pa_log_info("evdev vendor 0x%04hx product 0x%04hx version 0x%04hx bustype %u", input_id.vendor, input_id.product, input_id.version, input_id.bustype); memset(name, 0, sizeof(name)); if (ioctl(u->fd, EVIOCGNAME(sizeof(name)), name) < 0) { pa_log("EVIOCGNAME failed: %s", pa_cstrerror(errno)); goto fail; } pa_log_info("evdev device name: %s", name); memset(evtype_bitmask, 0, sizeof(evtype_bitmask)); if (ioctl(u->fd, EVIOCGBIT(0, EV_MAX), evtype_bitmask) < 0) { pa_log("EVIOCGBIT failed: %s", pa_cstrerror(errno)); goto fail; } if (!test_bit(EV_KEY, evtype_bitmask)) { pa_log("Device has no keys."); goto fail; } u->io = m->core->mainloop->io_new(m->core->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(m); return -1; } void pa__done(pa_module*m) { struct userdata *u; pa_assert(m); if (!(u = m->userdata)) return; if (u->io) m->core->mainloop->io_free(u->io); if (u->fd >= 0) { int r = pa_close(u->fd); if (r < 0) /* https://bugs.freedesktop.org/show_bug.cgi?id=80867 */ pa_log("Closing fd failed: %s", pa_cstrerror(errno)); } pa_xfree(u->sink_name); pa_xfree(u); }