[pulseaudio-discuss] [RFC v0 3/5] bluetooth: Expose card profile availability

[Mikel Astiz]

From: Mikel Astiz <mikel.astiz at bmw-carit.de>

Use the transport's state to not only update the ports availability, but
also to update the card profile availability flag. The interpretation is
as follows:
- PA_PROFILE_AVAILABLE_UNKNOWN: BT profile is connected but no audio
- PA_PROFILE_AVAILABLE_NO: BT profile disconnected
- PA_PROFILE_AVAILABLE_YES: BT profile connected and audio streaming
---
 src/modules/bluetooth/module-bluetooth-device.c | 17 ++++++++++++++++-
 1 file changed, 16 insertions(+), 1 deletion(-)

diff --git a/src/modules/bluetooth/module-bluetooth-device.c b/src/modules/bluetooth/module-bluetooth-device.c
index 33b2afa..0eaa4e5 100644
--- a/src/modules/bluetooth/module-bluetooth-device.c
+++ b/src/modules/bluetooth/module-bluetooth-device.c
@@ -1210,11 +1210,21 @@ static pa_port_available_t transport_state_to_availability_merged(pa_bluetooth_t
         return PA_PORT_AVAILABLE_UNKNOWN;
 }
 
+static pa_profile_available_t transport_state_to_profile_availability(pa_bluetooth_transport_state_t state) {
+    if (state == PA_BLUETOOTH_TRANSPORT_STATE_DISCONNECTED)
+        return PA_PROFILE_AVAILABLE_NO;
+    else if (state >= PA_BLUETOOTH_TRANSPORT_STATE_PLAYING)
+        return PA_PROFILE_AVAILABLE_YES;
+    else
+        return PA_PROFILE_AVAILABLE_UNKNOWN;
+}
+
 /* Run from main thread */
 static void handle_transport_state_change(struct userdata *u, struct pa_bluetooth_transport *transport) {
     bool acquire = false;
     bool release = false;
     enum profile profile;
+    pa_card_profile *cp;
     pa_bluetooth_transport_state_t state;
 
     pa_assert(u);
@@ -1223,9 +1233,13 @@ static void handle_transport_state_change(struct userdata *u, struct pa_bluetoot
     profile = transport->profile;
     state = transport->state;
 
-    if (!pa_hashmap_get(u->card->profiles, pa_bt_profile_to_string(profile)))
+    /* Update profile availability */
+    if (!(cp = pa_hashmap_get(u->card->profiles, pa_bt_profile_to_string(profile))))
         return;
 
+    pa_card_profile_set_available(cp, transport_state_to_profile_availability(state));
+
+    /* Update port availability */
     switch (profile) {
         case PROFILE_HFGW: {
             pa_device_port *port;
@@ -1301,6 +1315,7 @@ static void handle_transport_state_change(struct userdata *u, struct pa_bluetoot
             pa_assert_not_reached();
     }
 
+    /* Acquire or release transport as needed */
     if (acquire)
         if (bt_transport_acquire(u, true) >= 0) {
             if (u->source) {
-- 
1.8.1