From 2dd5bc6a074165ddfbd57c4bd52c2d2dac8f47a1 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sat, 27 Apr 2024 18:03:18 +0200 Subject: Adding upstream version 14.2. Signed-off-by: Daniel Baumann --- src/modules/module-mmkbd-evdev.c | 263 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 263 insertions(+) create mode 100644 src/modules/module-mmkbd-evdev.c (limited to 'src/modules/module-mmkbd-evdev.c') diff --git a/src/modules/module-mmkbd-evdev.c b/src/modules/module-mmkbd-evdev.c new file mode 100644 index 0000000..31693bb --- /dev/null +++ b/src/modules/module-mmkbd-evdev.c @@ -0,0 +1,263 @@ +/*** + 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 + +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); +} -- cgit v1.2.3