#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 "module-udev-detect-symdef.h"
PA_MODULE_LOAD_ONCE(TRUE);
PA_MODULE_USAGE(
"tsched=<enable system timer based scheduling mode?> "
- "ignore_dB=<ignore dB information from the device?>");
+ "ignore_dB=<ignore dB information from the device?> "
+ "deferred_volume=<syncronize sw and hw volume changes in IO-thread?>");
struct device {
char *path;
char *card_name;
char *args;
uint32_t module;
+ pa_ratelimit ratelimit;
};
struct userdata {
pa_bool_t use_tsched:1;
pa_bool_t ignore_dB:1;
+ pa_bool_t deferred_volume:1;
struct udev* udev;
struct udev_monitor *monitor;
static const char* const valid_modargs[] = {
"tsched",
"ignore_dB",
+ "deferred_volume",
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("%s/class/sound/card%s", udev_get_sys_path(udev), 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 pa_bool_t pcm_is_modem(const char *card_idx, const char *pcm) {
+ char *sysfs_path, *pcm_class;
+ pa_bool_t 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 pa_bool_t is_card_busy(const char *id) {
char *card_path = NULL, *pcm_path = NULL, *sub_status = NULL;
DIR *card_dir = NULL, *pcm_dir = NULL;
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))) {
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 (status_file)
fclose(status_file);
- if (!(status_file = fopen(sub_status, "r"))) {
+ if (!(status_file = pa_fopen_cloexec(sub_status, "r"))) {
pa_log_warn("Failed to open %s: %s", sub_status, pa_cstrerror(errno));
continue;
}
pa_log_debug("%s is busy: %s", d->path, pa_yes_no(busy));
if (!busy) {
- pa_log_debug("Loading module-alsa-card with arguments '%s'", d->args);
- m = pa_module_load(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);
+ /* 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)) {
+ pa_log_debug("Loading module-alsa-card with arguments '%s'", d->args);
+ m = pa_module_load(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
+ pa_log_info("Card %s (%s) failed to load module.", d->path, d->card_name);
} else
- pa_log_info("Card %s (%s) failed to load module.", d->path, d->card_name);
+ 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));
}
}
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")))
d->args = pa_sprintf_malloc("device_id=\"%s\" "
"name=\"%s\" "
"card_name=\"%s\" "
+ "namereg_fail=false "
"tsched=%s "
"ignore_dB=%s "
+ "deferred_volume=%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->ignore_dB));
+ pa_yes_no(u->ignore_dB),
+ pa_yes_no(u->deferred_volume));
pa_xfree(n);
pa_hashmap_put(u->devices, d->path, d);
return;
}
- if ((ff = udev_device_get_property_value(dev, "SOUND_FORM_FACTOR")) &&
+ 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;
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"))
+ 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
goto fail;
}
- if (!path_get_card_id(udev_device_get_devpath(dev)))
+ if (!path_get_card_id(udev_device_get_devpath(dev))) {
+ udev_device_unref(dev);
return;
+ }
process_device(u, dev);
udev_device_unref(dev);
struct udev_enumerate *enumerate = NULL;
struct udev_list_entry *item = NULL, *first = NULL;
int fd;
- pa_bool_t use_tsched = TRUE, ignore_dB = FALSE;
+ pa_bool_t use_tsched = TRUE, ignore_dB = FALSE, deferred_volume = m->core->deferred_volume;
+
pa_assert(m);
}
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 (!(u->udev = udev_new())) {
pa_log("Failed to initialize udev library.");
goto fail;
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 priviliged processes to listen to device events. "
+ "allows only privileged processes to listen to device events. "
"Please upgrade your kernel to at least 2.6.30.");
goto fail;
}