Update BT HFP call state to audio manager

aosp_diff/base_aaos/packages/modules/Bluetooth/0002-Update-BT-HFP-call-state-to-audio-manager.patch

@@ -0,0 +1,87 @@
+From ee78a86d781d957e116c5a1aeff1160d0715145e Mon Sep 17 00:00:00 2001
+From: Gowtham Anandha Babu <gowtham.anandha.babu@intel.com>
+Date: Thu, 16 Jan 2025 11:58:53 +0000
+Subject: [PATCH] Update BT HFP call state to audio manager
+
+As we are using btusb loopback device, there is no audio output
+if we open btusb card during DIALING/RINGING call state.
+
+Audio is routed properly when btusb loopback device is opened
+after call is picked up (i.e., call state to ACTIVE).
+
+We are updating this call state to audio manager, so that
+audio manager can open/close the btusb loopback device.
+
+Voice call verified.
+
+Tracked-On:
+Signed-off-by: Gowtham Anandha Babu <gowtham.anandha.babu@intel.com>
+---
+ .../hfpclient/HeadsetClientStateMachine.java  | 37 +++++++++++++++++++
+ 1 file changed, 37 insertions(+)
+
+diff --git a/android/app/src/com/android/bluetooth/hfpclient/HeadsetClientStateMachine.java b/android/app/src/com/android/bluetooth/hfpclient/HeadsetClientStateMachine.java
+index ee53a4dafe..1bc42b058d 100644
+--- a/android/app/src/com/android/bluetooth/hfpclient/HeadsetClientStateMachine.java
++++ b/android/app/src/com/android/bluetooth/hfpclient/HeadsetClientStateMachine.java
+@@ -124,6 +124,9 @@ public class HeadsetClientStateMachine extends StateMachine {
+     // Keep track of audio routing across all devices.
+     private static boolean sAudioIsRouted = false;
+
++    // Keep track of call state.
++    private static boolean sIsCallStateUpdatedToAudio = false;
++
+     private final Disconnected mDisconnected;
+     private final Connecting mConnecting;
+     private final Connected mConnected;
+@@ -373,6 +376,7 @@ public class HeadsetClientStateMachine extends StateMachine {
+         mService.sendBroadcast(
+                 intent, BLUETOOTH_CONNECT, Utils.getTempBroadcastOptions().toBundle());
+         HfpClientConnectionService.onCallChanged(c.getDevice(), c);
++	updateCallStateToAudioManager(c);
+     }
+
+     private void sendNetworkStateChangedIntent(BluetoothDevice device) {
+@@ -965,6 +969,39 @@ public class HeadsetClientStateMachine extends StateMachine {
+         sAudioIsRouted = enable;
+     }
+
++    synchronized void updateCallStateToAudioManager(HfpClientCall c) {
++        if (mAudioManager == null) {
++            Log.e(TAG, "AudioManager is null!");
++            return;
++        }
++
++        debug("bthfp_call_state=" + c.getState());
++        switch (c.getState()) {
++            case HfpClientCall.CALL_STATE_INCOMING:
++            case HfpClientCall.CALL_STATE_WAITING:
++            case HfpClientCall.CALL_STATE_HELD:
++            case HfpClientCall.CALL_STATE_HELD_BY_RESPONSE_AND_HOLD:
++            case HfpClientCall.CALL_STATE_ALERTING:
++            case HfpClientCall.CALL_STATE_DIALING:
++                /* Not handled as of now */
++                break;
++            case HfpClientCall.CALL_STATE_ACTIVE:
++                if (!sIsCallStateUpdatedToAudio) {
++                    mAudioManager.setParameters("bthfp_call_state=true");
++                    sIsCallStateUpdatedToAudio = true;
++                }
++                break;
++            case HfpClientCall.CALL_STATE_TERMINATED:
++                if (sIsCallStateUpdatedToAudio) {
++                    mAudioManager.setParameters("bthfp_call_state=false");
++                    sIsCallStateUpdatedToAudio = false;
++                }
++                break;
++            default:
++                break;
++        }
++    }
++
+     private AudioFocusRequest requestAudioFocus() {
+         AudioAttributes streamAttributes =
+                 new AudioAttributes.Builder()
+-- 
+2.34.1
+