| /*** | |
| This file is part of PulseAudio. | |
| Copyright 2009 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 <http://www.gnu.org/licenses/>. | |
| ***/ | |
| #ifdef HAVE_CONFIG_H | |
| #include <config.h> | |
| #endif | |
| #include <errno.h> | |
| #include <limits.h> | |
| #include <dirent.h> | |
| #include <sys/inotify.h> | |
| #include <libudev.h> | |
| #include <pulse/timeval.h> | |
| #include <pulsecore/modargs.h> | |
| #include <pulsecore/core-error.h> | |
| #include <pulsecore/core-util.h> | |
| #include <pulsecore/namereg.h> | |
| #include <pulsecore/ratelimit.h> | |
| #include <pulsecore/strbuf.h> | |
| PA_MODULE_AUTHOR("Lennart Poettering"); | |
| PA_MODULE_DESCRIPTION("Detect available audio hardware and load matching drivers"); | |
| PA_MODULE_VERSION(PACKAGE_VERSION); | |
| PA_MODULE_LOAD_ONCE(true); | |
| PA_MODULE_USAGE( | |
| "tsched=<enable system timer based scheduling mode?> " | |
| "tsched_buffer_size=<buffer size when using timer based scheduling> " | |
| "fixed_latency_range=<disable latency range changes on underrun?> " | |
| "ignore_dB=<ignore dB information from the device?> " | |
| "deferred_volume=<syncronize sw and hw volume changes in IO-thread?> " | |
| "use_ucm=<use ALSA UCM for card configuration?> " | |
| "avoid_resampling=<use stream original sample rate if possible?>"); | |
| struct device { | |
| char *path; | |
| bool need_verify; | |
| bool ignore; | |
| char *card_name; | |
| char *args; | |
| uint32_t module; | |
| pa_ratelimit ratelimit; | |
| }; | |
| struct userdata { | |
| pa_core *core; | |
| pa_hashmap *devices; | |
| bool use_tsched:1; | |
| bool tsched_buffer_size_valid:1; | |
| bool fixed_latency_range:1; | |
| bool ignore_dB:1; | |
| bool deferred_volume:1; | |
| bool use_ucm:1; | |
| bool avoid_resampling:1; | |
| uint32_t tsched_buffer_size; | |
| struct udev* udev; | |
| struct udev_monitor *monitor; | |
| pa_io_event *udev_io; | |
| int inotify_fd; | |
| pa_io_event *inotify_io; | |
| }; | |
| static const char* const valid_modargs[] = { | |
| "tsched", | |
| "tsched_buffer_size", | |
| "fixed_latency_range", | |
| "ignore_dB", | |
| "deferred_volume", | |
| "use_ucm", | |
| "avoid_resampling", | |
| NULL | |
| }; | |
| static int setup_inotify(struct userdata *u); | |
| static void device_free(struct device *d) { | |
| pa_assert(d); | |
| pa_xfree(d->path); | |
| pa_xfree(d->card_name); | |
| pa_xfree(d->args); | |
| pa_xfree(d); | |
| } | |
| static const char *path_get_card_id(const char *path) { | |
| const char *e; | |
| if (!path) | |
| return NULL; | |
| if (!(e = strrchr(path, '/'))) | |
| return NULL; | |
| if (!pa_startswith(e, "/card")) | |
| return NULL; | |
| return e + 5; | |
| } | |
| static char *card_get_sysattr(const char *card_idx, const char *name) { | |
| struct udev *udev; | |
| struct udev_device *card = NULL; | |
| char *t, *r = NULL; | |
| const char *v; | |
| pa_assert(card_idx); | |
| pa_assert(name); | |
| if (!(udev = udev_new())) { | |
| pa_log_error("Failed to allocate udev context."); | |
| goto finish; | |
| } | |
| t = pa_sprintf_malloc("/sys/class/sound/card%s", card_idx); | |
| card = udev_device_new_from_syspath(udev, t); | |
| pa_xfree(t); | |
| if (!card) { | |
| pa_log_error("Failed to get card object."); | |
| goto finish; | |
| } | |
| if ((v = udev_device_get_sysattr_value(card, name)) && *v) | |
| r = pa_xstrdup(v); | |
| finish: | |
| if (card) | |
| udev_device_unref(card); | |
| if (udev) | |
| udev_unref(udev); | |
| return r; | |
| } | |
| static bool pcm_is_modem(const char *card_idx, const char *pcm) { | |
| char *sysfs_path, *pcm_class; | |
| bool is_modem; | |
| pa_assert(card_idx); | |
| pa_assert(pcm); | |
| /* Check /sys/class/sound/card.../pcmC...../pcm_class. An HDA | |
| * modem can be used simultaneously with generic | |
| * playback/record. */ | |
| sysfs_path = pa_sprintf_malloc("pcmC%sD%s/pcm_class", card_idx, pcm); | |
| pcm_class = card_get_sysattr(card_idx, sysfs_path); | |
| is_modem = pcm_class && pa_streq(pcm_class, "modem"); | |
| pa_xfree(pcm_class); | |
| pa_xfree(sysfs_path); | |
| return is_modem; | |
| } | |
| static bool is_card_busy(const char *id) { | |
| char *card_path = NULL, *pcm_path = NULL, *sub_status = NULL; | |
| DIR *card_dir = NULL, *pcm_dir = NULL; | |
| FILE *status_file = NULL; | |
| struct dirent *de; | |
| bool busy = false; | |
| pa_assert(id); | |
| /* This simply uses /proc/asound/card.../pcm.../sub.../status to | |
| * check whether there is still a process using this audio device. */ | |
| card_path = pa_sprintf_malloc("/proc/asound/card%s", id); | |
| if (!(card_dir = opendir(card_path))) { | |
| pa_log_warn("Failed to open %s: %s", card_path, pa_cstrerror(errno)); | |
| goto fail; | |
| } | |
| for (;;) { | |
| errno = 0; | |
| de = readdir(card_dir); | |
| if (!de && errno) { | |
| pa_log_warn("readdir() failed: %s", pa_cstrerror(errno)); | |
| goto fail; | |
| } | |
| if (!de) | |
| break; | |
| if (!pa_startswith(de->d_name, "pcm")) | |
| continue; | |
| if (pcm_is_modem(id, de->d_name + 3)) | |
| continue; | |
| pa_xfree(pcm_path); | |
| pcm_path = pa_sprintf_malloc("%s/%s", card_path, de->d_name); | |
| if (pcm_dir) | |
| closedir(pcm_dir); | |
| if (!(pcm_dir = opendir(pcm_path))) { | |
| pa_log_warn("Failed to open %s: %s", pcm_path, pa_cstrerror(errno)); | |
| continue; | |
| } | |
| for (;;) { | |
| char line[32]; | |
| errno = 0; | |
| de = readdir(pcm_dir); | |
| if (!de && errno) { | |
| pa_log_warn("readdir() failed: %s", pa_cstrerror(errno)); | |
| goto fail; | |
| } | |
| if (!de) | |
| break; | |
| if (!pa_startswith(de->d_name, "sub")) | |
| continue; | |
| pa_xfree(sub_status); | |
| sub_status = pa_sprintf_malloc("%s/%s/status", pcm_path, de->d_name); | |
| if (status_file) | |
| fclose(status_file); | |
| if (!(status_file = pa_fopen_cloexec(sub_status, "r"))) { | |
| pa_log_warn("Failed to open %s: %s", sub_status, pa_cstrerror(errno)); | |
| continue; | |
| } | |
| if (!(fgets(line, sizeof(line)-1, status_file))) { | |
| pa_log_warn("Failed to read from %s: %s", sub_status, pa_cstrerror(errno)); | |
| continue; | |
| } | |
| if (!pa_streq(line, "closed\n")) { | |
| busy = true; | |
| break; | |
| } | |
| } | |
| } | |
| fail: | |
| pa_xfree(card_path); | |
| pa_xfree(pcm_path); | |
| pa_xfree(sub_status); | |
| if (card_dir) | |
| closedir(card_dir); | |
| if (pcm_dir) | |
| closedir(pcm_dir); | |
| if (status_file) | |
| fclose(status_file); | |
| return busy; | |
| } | |
| static void verify_access(struct userdata *u, struct device *d) { | |
| char *cd; | |
| pa_card *card; | |
| bool accessible; | |
| pa_assert(u); | |
| pa_assert(d); | |
| if (d->ignore) | |
| return; | |
| cd = pa_sprintf_malloc("/dev/snd/controlC%s", path_get_card_id(d->path)); | |
| accessible = access(cd, R_OK|W_OK) >= 0; | |
| pa_log_debug("%s is accessible: %s", cd, pa_yes_no(accessible)); | |
| pa_xfree(cd); | |
| if (d->module == PA_INVALID_INDEX) { | |
| /* If we are not loaded, try to load */ | |
| if (accessible) { | |
| pa_module *m; | |
| bool busy; | |
| /* Check if any of the PCM devices that belong to this | |
| * card are currently busy. If they are, don't try to load | |
| * right now, to make sure the probing phase can | |
| * successfully complete. When the current user of the | |
| * device closes it we will get another notification via | |
| * inotify and can then recheck. */ | |
| busy = is_card_busy(path_get_card_id(d->path)); | |
| pa_log_debug("%s is busy: %s", d->path, pa_yes_no(busy)); | |
| if (!busy) { | |
| /* So, why do we rate limit here? It's certainly ugly, | |
| * but there seems to be no other way. Problem is | |
| * this: if we are unable to configure/probe an audio | |
| * device after opening it we will close it again and | |
| * the module initialization will fail. This will then | |
| * cause an inotify event on the device node which | |
| * will be forwarded to us. We then try to reopen the | |
| * audio device again, practically entering a busy | |
| * loop. | |
| * | |
| * A clean fix would be if we would be able to ignore | |
| * our own inotify close events. However, inotify | |
| * lacks such functionality. Also, during probing of | |
| * the device we cannot really distinguish between | |
| * other processes causing EBUSY or ourselves, which | |
| * means we have no way to figure out if the probing | |
| * during opening was canceled by a "try again" | |
| * failure or a "fatal" failure. */ | |
| if (pa_ratelimit_test(&d->ratelimit, PA_LOG_DEBUG)) { | |
| int err; | |
| pa_log_debug("Loading module-alsa-card with arguments '%s'", d->args); | |
| err = pa_module_load(&m, u->core, "module-alsa-card", d->args); | |
| if (m) { | |
| d->module = m->index; | |
| pa_log_info("Card %s (%s) module loaded.", d->path, d->card_name); | |
| } else if (err == -PA_ERR_NOENTITY) { | |
| pa_log_info("Card %s (%s) module skipped.", d->path, d->card_name); | |
| d->ignore = true; | |
| } else { | |
| pa_log_info("Card %s (%s) failed to load module.", d->path, d->card_name); | |
| } | |
| } else | |
| pa_log_warn("Tried to configure %s (%s) more often than %u times in %llus", | |
| d->path, | |
| d->card_name, | |
| d->ratelimit.burst, | |
| (long long unsigned) (d->ratelimit.interval / PA_USEC_PER_SEC)); | |
| } | |
| } | |
| } else { | |
| /* If we are already loaded update suspend status with | |
| * accessible boolean */ | |
| if ((card = pa_namereg_get(u->core, d->card_name, PA_NAMEREG_CARD))) { | |
| pa_log_debug("%s all sinks and sources of card %s.", accessible ? "Resuming" : "Suspending", d->card_name); | |
| pa_card_suspend(card, !accessible, PA_SUSPEND_SESSION); | |
| } | |
| } | |
| } | |
| static void card_changed(struct userdata *u, struct udev_device *dev) { | |
| struct device *d; | |
| const char *path; | |
| const char *t; | |
| char *n; | |
| pa_strbuf *args_buf; | |
| pa_assert(u); | |
| pa_assert(dev); | |
| /* Maybe /dev/snd is now available? */ | |
| setup_inotify(u); | |
| path = udev_device_get_devpath(dev); | |
| if ((d = pa_hashmap_get(u->devices, path))) { | |
| verify_access(u, d); | |
| return; | |
| } | |
| d = pa_xnew0(struct device, 1); | |
| d->path = pa_xstrdup(path); | |
| d->module = PA_INVALID_INDEX; | |
| PA_INIT_RATELIMIT(d->ratelimit, 10*PA_USEC_PER_SEC, 5); | |
| if (!(t = udev_device_get_property_value(dev, "PULSE_NAME"))) | |
| if (!(t = udev_device_get_property_value(dev, "ID_ID"))) | |
| if (!(t = udev_device_get_property_value(dev, "ID_PATH"))) | |
| t = path_get_card_id(path); | |
| n = pa_namereg_make_valid_name(t); | |
| d->card_name = pa_sprintf_malloc("alsa_card.%s", n); | |
| args_buf = pa_strbuf_new(); | |
| pa_strbuf_printf(args_buf, | |
| "device_id=\"%s\" " | |
| "name=\"%s\" " | |
| "card_name=\"%s\" " | |
| "namereg_fail=false " | |
| "tsched=%s " | |
| "fixed_latency_range=%s " | |
| "ignore_dB=%s " | |
| "deferred_volume=%s " | |
| "use_ucm=%s " | |
| "avoid_resampling=%s " | |
| "card_properties=\"module-udev-detect.discovered=1\"", | |
| path_get_card_id(path), | |
| n, | |
| d->card_name, | |
| pa_yes_no(u->use_tsched), | |
| pa_yes_no(u->fixed_latency_range), | |
| pa_yes_no(u->ignore_dB), | |
| pa_yes_no(u->deferred_volume), | |
| pa_yes_no(u->use_ucm), | |
| pa_yes_no(u->avoid_resampling)); | |
| pa_xfree(n); | |
| if (u->tsched_buffer_size_valid) | |
| pa_strbuf_printf(args_buf, " tsched_buffer_size=%" PRIu32, u->tsched_buffer_size); | |
| d->args = pa_strbuf_to_string_free(args_buf); | |
| pa_hashmap_put(u->devices, d->path, d); | |
| verify_access(u, d); | |
| } | |
| static void remove_card(struct userdata *u, struct udev_device *dev) { | |
| struct device *d; | |
| pa_assert(u); | |
| pa_assert(dev); | |
| if (!(d = pa_hashmap_remove(u->devices, udev_device_get_devpath(dev)))) | |
| return; | |
| pa_log_info("Card %s removed.", d->path); | |
| if (d->module != PA_INVALID_INDEX) | |
| pa_module_unload_request_by_index(u->core, d->module, true); | |
| device_free(d); | |
| } | |
| static void process_device(struct userdata *u, struct udev_device *dev) { | |
| const char *action, *ff; | |
| pa_assert(u); | |
| pa_assert(dev); | |
| if (udev_device_get_property_value(dev, "PULSE_IGNORE")) { | |
| pa_log_debug("Ignoring %s, because marked so.", udev_device_get_devpath(dev)); | |
| return; | |
| } | |
| if ((ff = udev_device_get_property_value(dev, "SOUND_CLASS")) && | |
| pa_streq(ff, "modem")) { | |
| pa_log_debug("Ignoring %s, because it is a modem.", udev_device_get_devpath(dev)); | |
| return; | |
| } | |
| action = udev_device_get_action(dev); | |
| if (action && pa_streq(action, "remove")) | |
| remove_card(u, dev); | |
| else if ((!action || pa_streq(action, "change")) && udev_device_get_property_value(dev, "SOUND_INITIALIZED")) | |
| card_changed(u, dev); | |
| /* For an explanation why we don't look for 'add' events here | |
| * have a look into /lib/udev/rules.d/78-sound-card.rules! */ | |
| } | |
| static void process_path(struct userdata *u, const char *path) { | |
| struct udev_device *dev; | |
| if (!path_get_card_id(path)) | |
| return; | |
| if (!(dev = udev_device_new_from_syspath(u->udev, path))) { | |
| pa_log("Failed to get udev device object from udev."); | |
| return; | |
| } | |
| process_device(u, dev); | |
| udev_device_unref(dev); | |
| } | |
| static void monitor_cb( | |
| pa_mainloop_api*a, | |
| pa_io_event* e, | |
| int fd, | |
| pa_io_event_flags_t events, | |
| void *userdata) { | |
| struct userdata *u = userdata; | |
| struct udev_device *dev; | |
| pa_assert(a); | |
| if (!(dev = udev_monitor_receive_device(u->monitor))) { | |
| pa_log("Failed to get udev device object from monitor."); | |
| goto fail; | |
| } | |
| if (!path_get_card_id(udev_device_get_devpath(dev))) { | |
| udev_device_unref(dev); | |
| return; | |
| } | |
| process_device(u, dev); | |
| udev_device_unref(dev); | |
| return; | |
| fail: | |
| a->io_free(u->udev_io); | |
| u->udev_io = NULL; | |
| } | |
| static bool pcm_node_belongs_to_device( | |
| struct device *d, | |
| const char *node) { | |
| char *cd; | |
| bool b; | |
| cd = pa_sprintf_malloc("pcmC%sD", path_get_card_id(d->path)); | |
| b = pa_startswith(node, cd); | |
| pa_xfree(cd); | |
| return b; | |
| } | |
| static bool control_node_belongs_to_device( | |
| struct device *d, | |
| const char *node) { | |
| char *cd; | |
| bool b; | |
| cd = pa_sprintf_malloc("controlC%s", path_get_card_id(d->path)); | |
| b = pa_streq(node, cd); | |
| pa_xfree(cd); | |
| return b; | |
| } | |
| static void inotify_cb( | |
| pa_mainloop_api*a, | |
| pa_io_event* e, | |
| int fd, | |
| pa_io_event_flags_t events, | |
| void *userdata) { | |
| struct { | |
| struct inotify_event e; | |
| char name[NAME_MAX]; | |
| } buf; | |
| struct userdata *u = userdata; | |
| static int type = 0; | |
| bool deleted = false; | |
| struct device *d; | |
| void *state; | |
| for (;;) { | |
| ssize_t r; | |
| struct inotify_event *event; | |
| pa_zero(buf); | |
| if ((r = pa_read(fd, &buf, sizeof(buf), &type)) <= 0) { | |
| if (r < 0 && errno == EAGAIN) | |
| break; | |
| pa_log("read() from inotify failed: %s", r < 0 ? pa_cstrerror(errno) : "EOF"); | |
| goto fail; | |
| } | |
| event = &buf.e; | |
| while (r > 0) { | |
| size_t len; | |
| if ((size_t) r < sizeof(struct inotify_event)) { | |
| pa_log("read() too short."); | |
| goto fail; | |
| } | |
| len = sizeof(struct inotify_event) + event->len; | |
| if ((size_t) r < len) { | |
| pa_log("Payload missing."); | |
| goto fail; | |
| } | |
| /* From udev we get the guarantee that the control | |
| * device's ACL is changed last. To avoid races when ACLs | |
| * are changed we hence watch only the control device */ | |
| if (((event->mask & IN_ATTRIB) && pa_startswith(event->name, "controlC"))) | |
| PA_HASHMAP_FOREACH(d, u->devices, state) | |
| if (control_node_belongs_to_device(d, event->name)) | |
| d->need_verify = true; | |
| /* ALSA doesn't really give us any guarantee on the closing | |
| * order, so let's simply hope */ | |
| if (((event->mask & IN_CLOSE_WRITE) && pa_startswith(event->name, "pcmC"))) | |
| PA_HASHMAP_FOREACH(d, u->devices, state) | |
| if (pcm_node_belongs_to_device(d, event->name)) | |
| d->need_verify = true; | |
| /* /dev/snd/ might have been removed */ | |
| if ((event->mask & (IN_DELETE_SELF|IN_MOVE_SELF))) | |
| deleted = true; | |
| event = (struct inotify_event*) ((uint8_t*) event + len); | |
| r -= len; | |
| } | |
| } | |
| PA_HASHMAP_FOREACH(d, u->devices, state) | |
| if (d->need_verify) { | |
| d->need_verify = false; | |
| verify_access(u, d); | |
| } | |
| if (!deleted) | |
| return; | |
| fail: | |
| if (u->inotify_io) { | |
| a->io_free(u->inotify_io); | |
| u->inotify_io = NULL; | |
| } | |
| if (u->inotify_fd >= 0) { | |
| pa_close(u->inotify_fd); | |
| u->inotify_fd = -1; | |
| } | |
| } | |
| static int setup_inotify(struct userdata *u) { | |
| int r; | |
| if (u->inotify_fd >= 0) | |
| return 0; | |
| if ((u->inotify_fd = inotify_init1(IN_CLOEXEC|IN_NONBLOCK)) < 0) { | |
| pa_log("inotify_init1() failed: %s", pa_cstrerror(errno)); | |
| return -1; | |
| } | |
| r = inotify_add_watch(u->inotify_fd, "/dev/snd", IN_ATTRIB|IN_CLOSE_WRITE|IN_DELETE_SELF|IN_MOVE_SELF); | |
| if (r < 0) { | |
| int saved_errno = errno; | |
| pa_close(u->inotify_fd); | |
| u->inotify_fd = -1; | |
| if (saved_errno == ENOENT) { | |
| pa_log_debug("/dev/snd/ is apparently not existing yet, retrying to create inotify watch later."); | |
| return 0; | |
| } | |
| if (saved_errno == ENOSPC) { | |
| pa_log("You apparently ran out of inotify watches, probably because Tracker/Beagle took them all away. " | |
| "I wished people would do their homework first and fix inotify before using it for watching whole " | |
| "directory trees which is something the current inotify is certainly not useful for. " | |
| "Please make sure to drop the Tracker/Beagle guys a line complaining about their broken use of inotify."); | |
| return 0; | |
| } | |
| pa_log("inotify_add_watch() failed: %s", pa_cstrerror(saved_errno)); | |
| return -1; | |
| } | |
| pa_assert_se(u->inotify_io = u->core->mainloop->io_new(u->core->mainloop, u->inotify_fd, PA_IO_EVENT_INPUT, inotify_cb, u)); | |
| return 0; | |
| } | |
| int pa__init(pa_module *m) { | |
| struct userdata *u = NULL; | |
| pa_modargs *ma; | |
| struct udev_enumerate *enumerate = NULL; | |
| struct udev_list_entry *item = NULL, *first = NULL; | |
| int fd; | |
| bool use_tsched = true, fixed_latency_range = false, ignore_dB = false, deferred_volume = m->core->deferred_volume; | |
| bool use_ucm = true; | |
| bool avoid_resampling; | |
| pa_assert(m); | |
| if (!(ma = pa_modargs_new(m->argument, valid_modargs))) { | |
| pa_log("Failed to parse module arguments"); | |
| goto fail; | |
| } | |
| m->userdata = u = pa_xnew0(struct userdata, 1); | |
| u->core = m->core; | |
| u->devices = pa_hashmap_new_full(pa_idxset_string_hash_func, pa_idxset_string_compare_func, NULL, (pa_free_cb_t) device_free); | |
| u->inotify_fd = -1; | |
| if (pa_modargs_get_value_boolean(ma, "tsched", &use_tsched) < 0) { | |
| pa_log("Failed to parse tsched= argument."); | |
| goto fail; | |
| } | |
| u->use_tsched = use_tsched; | |
| if (pa_modargs_get_value(ma, "tsched_buffer_size", NULL)) { | |
| if (pa_modargs_get_value_u32(ma, "tsched_buffer_size", &u->tsched_buffer_size) < 0) { | |
| pa_log("Failed to parse tsched_buffer_size= argument."); | |
| goto fail; | |
| } | |
| u->tsched_buffer_size_valid = true; | |
| } | |
| if (pa_modargs_get_value_boolean(ma, "fixed_latency_range", &fixed_latency_range) < 0) { | |
| pa_log("Failed to parse fixed_latency_range= argument."); | |
| goto fail; | |
| } | |
| u->fixed_latency_range = fixed_latency_range; | |
| if (pa_modargs_get_value_boolean(ma, "ignore_dB", &ignore_dB) < 0) { | |
| pa_log("Failed to parse ignore_dB= argument."); | |
| goto fail; | |
| } | |
| u->ignore_dB = ignore_dB; | |
| if (pa_modargs_get_value_boolean(ma, "deferred_volume", &deferred_volume) < 0) { | |
| pa_log("Failed to parse deferred_volume= argument."); | |
| goto fail; | |
| } | |
| u->deferred_volume = deferred_volume; | |
| if (pa_modargs_get_value_boolean(ma, "use_ucm", &use_ucm) < 0) { | |
| pa_log("Failed to parse use_ucm= argument."); | |
| goto fail; | |
| } | |
| u->use_ucm = use_ucm; | |
| avoid_resampling = m->core->avoid_resampling; | |
| if (pa_modargs_get_value_boolean(ma, "avoid_resampling", &avoid_resampling) < 0) { | |
| pa_log("Failed to parse avoid_resampling= argument."); | |
| goto fail; | |
| } | |
| u->avoid_resampling = avoid_resampling; | |
| if (!(u->udev = udev_new())) { | |
| pa_log("Failed to initialize udev library."); | |
| goto fail; | |
| } | |
| if (setup_inotify(u) < 0) | |
| goto fail; | |
| if (!(u->monitor = udev_monitor_new_from_netlink(u->udev, "udev"))) { | |
| pa_log("Failed to initialize monitor."); | |
| goto fail; | |
| } | |
| if (udev_monitor_filter_add_match_subsystem_devtype(u->monitor, "sound", NULL) < 0) { | |
| pa_log("Failed to subscribe to sound devices."); | |
| goto fail; | |
| } | |
| errno = 0; | |
| if (udev_monitor_enable_receiving(u->monitor) < 0) { | |
| pa_log("Failed to enable monitor: %s", pa_cstrerror(errno)); | |
| if (errno == EPERM) | |
| pa_log_info("Most likely your kernel is simply too old and " | |
| "allows only privileged processes to listen to device events. " | |
| "Please upgrade your kernel to at least 2.6.30."); | |
| goto fail; | |
| } | |
| if ((fd = udev_monitor_get_fd(u->monitor)) < 0) { | |
| pa_log("Failed to get udev monitor fd."); | |
| goto fail; | |
| } | |
| pa_assert_se(u->udev_io = u->core->mainloop->io_new(u->core->mainloop, fd, PA_IO_EVENT_INPUT, monitor_cb, u)); | |
| if (!(enumerate = udev_enumerate_new(u->udev))) { | |
| pa_log("Failed to initialize udev enumerator."); | |
| goto fail; | |
| } | |
| if (udev_enumerate_add_match_subsystem(enumerate, "sound") < 0) { | |
| pa_log("Failed to match to subsystem."); | |
| goto fail; | |
| } | |
| if (udev_enumerate_scan_devices(enumerate) < 0) { | |
| pa_log("Failed to scan for devices."); | |
| goto fail; | |
| } | |
| first = udev_enumerate_get_list_entry(enumerate); | |
| udev_list_entry_foreach(item, first) | |
| process_path(u, udev_list_entry_get_name(item)); | |
| udev_enumerate_unref(enumerate); | |
| pa_log_info("Found %u cards.", pa_hashmap_size(u->devices)); | |
| pa_modargs_free(ma); | |
| return 0; | |
| fail: | |
| if (enumerate) | |
| udev_enumerate_unref(enumerate); | |
| 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->udev_io) | |
| m->core->mainloop->io_free(u->udev_io); | |
| if (u->monitor) | |
| udev_monitor_unref(u->monitor); | |
| if (u->udev) | |
| udev_unref(u->udev); | |
| if (u->inotify_io) | |
| m->core->mainloop->io_free(u->inotify_io); | |
| if (u->inotify_fd >= 0) | |
| pa_close(u->inotify_fd); | |
| if (u->devices) | |
| pa_hashmap_free(u->devices); | |
| pa_xfree(u); | |
| } |