diff options
Diffstat (limited to 'backends/alsa')
| -rw-r--r-- | backends/alsa/Makefile.am | 2 | ||||
| -rw-r--r-- | backends/alsa/alsa-backend.c | 136 |
2 files changed, 133 insertions, 5 deletions
diff --git a/backends/alsa/Makefile.am b/backends/alsa/Makefile.am index 06e04a7..798ce8b 100644 --- a/backends/alsa/Makefile.am +++ b/backends/alsa/Makefile.am @@ -8,6 +8,7 @@ AM_CPPFLAGS = \ -I$(top_srcdir) \ -DG_LOG_DOMAIN=\"libmatemixer-alsa\" \ $(GLIB_CFLAGS) \ + $(UDEV_CFLAGS) \ $(ALSA_CFLAGS) \ $(NULL) @@ -43,6 +44,7 @@ libmatemixer_alsa_la_SOURCES = \ libmatemixer_alsa_la_LIBADD = \ $(GLIB_LIBS) \ + $(UDEV_LIBS) \ $(ALSA_LIBS) libmatemixer_alsa_la_LDFLAGS = \ diff --git a/backends/alsa/alsa-backend.c b/backends/alsa/alsa-backend.c index 39f67cc..2475385 100644 --- a/backends/alsa/alsa-backend.c +++ b/backends/alsa/alsa-backend.c @@ -15,9 +15,15 @@ * License along with this library; if not, see <http://www.gnu.org/licenses/>. */ +#include "config.h" + #include <glib.h> #include <glib-object.h> #include <alsa/asoundlib.h> +#ifdef HAVE_UDEV +#include <libudev.h> +#include <glib-unix.h> +#endif #include <libmatemixer/matemixer.h> #include <libmatemixer/matemixer-private.h> @@ -45,6 +51,15 @@ struct _AlsaBackendPrivate GList *streams; GList *devices; GHashTable *devices_ids; + +#ifdef HAVE_UDEV + struct { + struct udev *udev; + struct udev_monitor *monitor; + guint fd_source; + int fd; + } udev; +#endif }; static void alsa_backend_dispose (GObject *object); @@ -169,15 +184,99 @@ alsa_backend_finalize (GObject *object) G_OBJECT_CLASS (alsa_backend_parent_class)->finalize (object); } +#ifdef HAVE_UDEV +static gboolean udev_event_ok (struct udev_device *dev) +{ + const char *action = udev_device_get_action (dev); + + if (action && !strcmp (action, "remove")) + return TRUE; + + /* + * See /lib/udev/rules.d/78-sound-card.rules + * why "add" events are not handled here. + */ + if ((!action || !strcmp (action, "change")) && + udev_device_get_property_value (dev, "SOUND_INITIALIZED")) + return TRUE; + + return FALSE; +} + static gboolean -alsa_backend_open (MateMixerBackend *backend) +udev_monitor_cb (gint fd, + GIOCondition condition, + gpointer user_data) { - AlsaBackend *alsa; + AlsaBackend *alsa = user_data; + struct udev_device *dev; - g_return_val_if_fail (ALSA_IS_BACKEND (backend), FALSE); + dev = udev_monitor_receive_device (alsa->priv->udev.monitor); + if (!dev) + return TRUE; - alsa = ALSA_BACKEND (backend); + if (!udev_event_ok (dev)) { + udev_device_unref (dev); + return TRUE; + } + + read_devices (alsa); + + udev_device_unref (dev); + + return TRUE; +} + +static gboolean +udev_monitor_setup (AlsaBackend *alsa) +{ + alsa->priv->udev.udev = udev_new (); + if (!alsa->priv->udev.udev) + return FALSE; + + alsa->priv->udev.monitor = udev_monitor_new_from_netlink (alsa->priv->udev.udev, "udev"); + if (!alsa->priv->udev.monitor) { + udev_unref (alsa->priv->udev.udev); + alsa->priv->udev.udev = NULL; + return FALSE; + } + + if (udev_monitor_filter_add_match_subsystem_devtype (alsa->priv->udev.monitor, "sound", NULL) < 0 || + udev_monitor_enable_receiving (alsa->priv->udev.monitor) < 0) { + udev_monitor_unref (alsa->priv->udev.monitor); + udev_unref (alsa->priv->udev.udev); + alsa->priv->udev.udev = NULL; + return FALSE; + } + + alsa->priv->udev.fd = udev_monitor_get_fd (alsa->priv->udev.monitor); + if (alsa->priv->udev.fd < 0) { + udev_monitor_unref (alsa->priv->udev.monitor); + udev_unref (alsa->priv->udev.udev); + alsa->priv->udev.udev = NULL; + return FALSE; + } + alsa->priv->udev.fd_source = g_unix_fd_add (alsa->priv->udev.fd, G_IO_IN, udev_monitor_cb, alsa); + + return TRUE; +} + +static void +udev_monitor_cleanup (AlsaBackend *alsa) +{ + if (!alsa->priv->udev.udev) + return; + + g_source_remove (alsa->priv->udev.fd_source); + udev_monitor_unref (alsa->priv->udev.monitor); + udev_unref (alsa->priv->udev.udev); +} +#endif + +static void +timeout_source_setup (AlsaBackend *alsa) +{ /* Poll ALSA for changes every second, this only discovers added or removed * sound cards, sound card related events are handled by AlsaDevices */ alsa->priv->timeout_source = g_timeout_source_new_seconds (1); @@ -187,6 +286,30 @@ alsa_backend_open (MateMixerBackend *backend) NULL); g_source_attach (alsa->priv->timeout_source, g_main_context_get_thread_default ()); +} + +static void +timeout_source_cleanup (AlsaBackend *alsa) +{ + if (!alsa->priv->timeout_source) + return; + + g_source_destroy (alsa->priv->timeout_source); +} + +static gboolean +alsa_backend_open (MateMixerBackend *backend) +{ + AlsaBackend *alsa; + + g_return_val_if_fail (ALSA_IS_BACKEND (backend), FALSE); + + alsa = ALSA_BACKEND (backend); + +#ifdef HAVE_UDEV + if (!udev_monitor_setup (alsa)) +#endif + timeout_source_setup (alsa); /* Read the initial list of devices so we have some starting point, there * isn't really a way to detect errors here, failing to add a device may @@ -206,7 +329,10 @@ alsa_backend_close (MateMixerBackend *backend) alsa = ALSA_BACKEND (backend); - g_source_destroy (alsa->priv->timeout_source); + timeout_source_cleanup (alsa); +#ifdef HAVE_UDEV + udev_monitor_cleanup (alsa); +#endif if (alsa->priv->devices != NULL) { g_list_free_full (alsa->priv->devices, g_object_unref); |