samples: Bluetooth: Use broadcast sink cbs in broadcast sink sample

Use the broadcast sink callbacks to set the semaphores
rather than the stream callbacks, as the broadcast sink callbacks
are better for that as they are called when all streams are ready.

Signed-off-by: Emil Gydesen <emil.gydesen@nordicsemi.no>

samples/bluetooth/bap_broadcast_sink/src/main.c

@@ -536,11 +536,6 @@ static void stream_started_cb(struct bt_bap_stream *stream)
 #endif /* CONFIG_LIBLC3 */
 
 	k_sem_give(&sem_stream_started);
-	if (k_sem_count_get(&sem_stream_started) == stream_count) {
-		big_synced = true;
-		printk("BIG synced\n");
-		k_sem_give(&sem_big_synced);
-	}
 }
 
 static void stream_stopped_cb(struct bt_bap_stream *stream, uint8_t reason)
@@ -553,11 +548,6 @@ static void stream_stopped_cb(struct bt_bap_stream *stream, uint8_t reason)
 	if (err != 0) {
 		printk("Failed to take sem_stream_started: %d\n", err);
 	}
-
-	if (k_sem_count_get(&sem_stream_started) != stream_count) {
-		printk("BIG sync terminated\n");
-		big_synced = false;
-	}
 }
 
 static void stream_recv_cb(struct bt_bap_stream *stream, const struct bt_iso_recv_info *info,
@@ -818,9 +808,27 @@ static void syncable_cb(struct bt_bap_broadcast_sink *sink, const struct bt_iso_
 	}
 }
 
+static void broadcast_sink_started_cb(struct bt_bap_broadcast_sink *sink)
+{
+	printk("Broadcast sink %p started\n", sink);
+
+	big_synced = true;
+	k_sem_give(&sem_big_synced);
+}
+
+static void broadcast_sink_stopped_cb(struct bt_bap_broadcast_sink *sink, uint8_t reason)
+{
+	printk("Broadcast sink %p stopped with reason 0x%02X\n", sink, reason);
+
+	big_synced = false;
+	k_sem_give(&sem_broadcast_sink_stopped);
+}
+
 static struct bt_bap_broadcast_sink_cb broadcast_sink_cbs = {
 	.base_recv = base_recv_cb,
 	.syncable = syncable_cb,
+	.started = broadcast_sink_started_cb,
+	.stopped = broadcast_sink_stopped_cb,
 };
 
 static void pa_timer_handler(struct k_work *work)
@@ -1027,8 +1035,6 @@ static int bis_sync_req_cb(struct bt_conn *conn,
 
 			return err;
 		}
-
-		k_sem_give(&sem_broadcast_sink_stopped);
 	}
 
 	broadcaster_broadcast_id = recv_state->broadcast_id;
@@ -1242,7 +1248,7 @@ static void bap_pa_sync_terminated_cb(struct bt_le_per_adv_sync *sync,
 		if (info->reason != BT_HCI_ERR_LOCALHOST_TERM_CONN && req_recv_state != NULL) {
 			int err;
 
-			if (k_sem_count_get(&sem_stream_connected) > 0) {
+			if (big_synced) {
 				err = bt_bap_broadcast_sink_stop(broadcast_sink);
 				if (err != 0) {
 					printk("Failed to stop Broadcast Sink: %d\n", err);
@@ -1257,8 +1263,6 @@ static void bap_pa_sync_terminated_cb(struct bt_le_per_adv_sync *sync,
 
 				return;
 			}
-
-			k_sem_give(&sem_broadcast_sink_stopped);
 		}
 	}
 }