コード例 #1
0
static void card_changed(struct userdata *u, struct udev_device *dev) {
    struct device *d;
    const char *path;
    const char *t;
    char *n;

    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);
    d->args = pa_sprintf_malloc("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=1 "
                                "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_xfree(n);

    pa_hashmap_put(u->devices, d->path, d);

    verify_access(u, d);
}
コード例 #2
0
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;
}
コード例 #3
0
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;
}
コード例 #4
0
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;
}
コード例 #5
0
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);
}
コード例 #6
0
static void verify_access(struct userdata *u, struct device *d) {
    char *cd;
    pa_card *card;
    bool accessible;

    pa_assert(u);
    pa_assert(d);

    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)) {
                    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_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);
        }
    }
}