[PATCH v2 15/22] bluetooth: Release transport when not available

[mikel.astiz.oss@xxxxxxxxx (Mikel Astiz)]

From: Mikel Astiz <mikel.astiz@xxxxxxxxxxxx>

Handle the Playing->Connected transition gracefully by releasing the
transport and setting the sink and sources as suspended. This is
necessary since the IO thread might not encounter a HUP always.
---
 src/modules/bluetooth/module-bluetooth-device.c |   19 +++++++++++++++++++
 1 files changed, 19 insertions(+), 0 deletions(-)

diff --git a/src/modules/bluetooth/module-bluetooth-device.c b/src/modules/bluetooth/module-bluetooth-device.c
index 76af4f2..e8c571e 100644
--- a/src/modules/bluetooth/module-bluetooth-device.c
+++ b/src/modules/bluetooth/module-bluetooth-device.c
@@ -1307,6 +1307,7 @@ static DBusHandlerResult filter_cb(DBusConnection *bus, DBusMessage *m, void *us
     DBusError err;
     struct userdata *u;
     bool acquire = FALSE;
+    bool release = FALSE;
 
     pa_assert(bus);
     pa_assert(m);
@@ -1385,6 +1386,7 @@ static DBusHandlerResult filter_cb(DBusConnection *bus, DBusMessage *m, void *us
             pa_device_port_set_available(port, available);
 
             acquire = (available == PA_PORT_AVAILABLE_YES && u->profile == PROFILE_HFGW);
+            release = (available != PA_PORT_AVAILABLE_YES && u->profile == PROFILE_HFGW);
         }
     } else if (dbus_message_is_signal(m, "org.bluez.Headset", "PropertyChanged")) {
         pa_bt_audio_state_t state = parse_state_property_change(m);
@@ -1400,6 +1402,7 @@ static DBusHandlerResult filter_cb(DBusConnection *bus, DBusMessage *m, void *us
             pa_device_port_set_available(port, available);
 
             acquire = (available == PA_PORT_AVAILABLE_YES && u->profile == PROFILE_HSP);
+            release = (available != PA_PORT_AVAILABLE_YES && u->profile == PROFILE_HSP);
         }
     } else if (dbus_message_is_signal(m, "org.bluez.AudioSource", "PropertyChanged")) {
         pa_bt_audio_state_t state = parse_state_property_change(m);
@@ -1412,6 +1415,7 @@ static DBusHandlerResult filter_cb(DBusConnection *bus, DBusMessage *m, void *us
             pa_device_port_set_available(port, available);
 
             acquire = (available == PA_PORT_AVAILABLE_YES && u->profile == PROFILE_A2DP_SOURCE);
+            release = (available != PA_PORT_AVAILABLE_YES && u->profile == PROFILE_A2DP_SOURCE);
         }
     } else if (dbus_message_is_signal(m, "org.bluez.AudioSink", "PropertyChanged")) {
         pa_bt_audio_state_t state = parse_state_property_change(m);
@@ -1424,6 +1428,7 @@ static DBusHandlerResult filter_cb(DBusConnection *bus, DBusMessage *m, void *us
             pa_device_port_set_available(port, available);
 
             acquire = (available == PA_PORT_AVAILABLE_YES && u->profile == PROFILE_A2DP);
+            release = (available != PA_PORT_AVAILABLE_YES && u->profile == PROFILE_A2DP);
         }
     }
 
@@ -1436,6 +1441,20 @@ static DBusHandlerResult filter_cb(DBusConnection *bus, DBusMessage *m, void *us
                 pa_sink_suspend(u->sink, FALSE, PA_SUSPEND_IDLE|PA_SUSPEND_USER);
         }
 
+    if (release && bt_transport_is_acquired(u)) {
+        /* FIXME: this release is racy, since the audio stream might have
+           been set up again in the meantime (but not processed yet by PA).
+           BlueZ should probably release the transport automatically, and
+           in that case we would just mark the transport as released */
+
+        /* Remote side closed the stream so we consider it PA_SUSPEND_USER */
+        if (u->source)
+            pa_source_suspend(u->source, TRUE, PA_SUSPEND_USER);
+
+        if (u->sink)
+            pa_sink_suspend(u->sink, TRUE, PA_SUSPEND_USER);
+    }
+
 fail:
     dbus_error_free(&err);
 
-- 
1.7.7.6