Enable sendKeyEvent() for all types of devices

Previously there was only sendKeyEvent() implementation for TV and the
method was no-op for other devices. This change moves the event handling
logic into HdmiCecLocalDevice so as to make this method work on the
playback device.

Bug: 33285033
Test: Sent key event from playback device, and it worked.
Change-Id: I937502ab87ce823630b0f9a933355d5a4cc5e96a

services/core/java/com/android/server/hdmi/HdmiCecLocalDevice.java

@@ -888,13 +888,42 @@ abstract class HdmiCecLocalDevice {
     }
 
     /**
-     * Send a key event to other device.
+     * Send a key event to other CEC device. The logical address of target device will be given by
+     * {@link #findKeyReceiverAddress}.
      *
      * @param keyCode key code defined in {@link android.view.KeyEvent}
      * @param isPressed {@code true} for key down event
+     * @see #findKeyReceiverAddress()
      */
+    @ServiceThreadOnly
     protected void sendKeyEvent(int keyCode, boolean isPressed) {
-        Slog.w(TAG, "sendKeyEvent not implemented");
+        assertRunOnServiceThread();
+        if (!HdmiCecKeycode.isSupportedKeycode(keyCode)) {
+            Slog.w(TAG, "Unsupported key: " + keyCode);
+            return;
+        }
+        List<SendKeyAction> action = getActions(SendKeyAction.class);
+        int logicalAddress = findKeyReceiverAddress();
+        if (logicalAddress == Constants.ADDR_INVALID || logicalAddress == mAddress) {
+            // Don't send key event to invalid device or itself.
+            Slog.w(TAG, "Discard key event: " + keyCode + ", pressed:" + isPressed
+                    + ", receiverAddr=" + logicalAddress);
+        } else if (!action.isEmpty()) {
+            action.get(0).processKeyEvent(keyCode, isPressed);
+        } else if (isPressed) {
+            addAndStartAction(new SendKeyAction(this, logicalAddress, keyCode));
+        }
+    }
+
+    /**
+     * Returns the logical address of the device which will receive key events via
+     * {@link #sendKeyEvent}.
+     *
+     * @see #sendKeyEvent(int, boolean)
+     */
+    protected int findKeyReceiverAddress() {
+        Slog.w(TAG, "findKeyReceiverAddress is not implemented");
+        return Constants.ADDR_INVALID;
     }
 
     void sendUserControlPressedAndReleased(int targetAddress, int cecKeycode) {

services/core/java/com/android/server/hdmi/HdmiCecLocalDevicePlayback.java

@@ -354,6 +354,11 @@ final class HdmiCecLocalDevicePlayback extends HdmiCecLocalDevice {
         }
     }
 
+    @Override
+    protected int findKeyReceiverAddress() {
+        return Constants.ADDR_TV;
+    }
+
     @Override
     @ServiceThreadOnly
     protected void sendStandby(int deviceId) {

services/core/java/com/android/server/hdmi/HdmiCecLocalDeviceTv.java

@@ -432,40 +432,8 @@ final class HdmiCecLocalDeviceTv extends HdmiCecLocalDevice {
         return mService.getPowerStatus();
     }
 
-    /**
-     * Sends key to a target CEC device.
-     *
-     * @param keyCode key code to send. Defined in {@link android.view.KeyEvent}.
-     * @param isPressed true if this is key press event
-     */
     @Override
-    @ServiceThreadOnly
-    protected void sendKeyEvent(int keyCode, boolean isPressed) {
-        assertRunOnServiceThread();
-        if (!HdmiCecKeycode.isSupportedKeycode(keyCode)) {
-            Slog.w(TAG, "Unsupported key: " + keyCode);
-            return;
-        }
-        List<SendKeyAction> action = getActions(SendKeyAction.class);
-        int logicalAddress = findKeyReceiverAddress();
-        if (logicalAddress == mAddress) {
-            Slog.w(TAG, "Discard key event to itself :" + keyCode + " pressed:" + isPressed);
-            return;
-        }
-        if (!action.isEmpty()) {
-            action.get(0).processKeyEvent(keyCode, isPressed);
-        } else {
-            if (isPressed) {
-                if (logicalAddress != Constants.ADDR_INVALID) {
-                    addAndStartAction(new SendKeyAction(this, logicalAddress, keyCode));
-                    return;
-                }
-            }
-            Slog.w(TAG, "Discard key event: " + keyCode + " pressed:" + isPressed);
-        }
-    }
-
-    private int findKeyReceiverAddress() {
+    protected int findKeyReceiverAddress() {
         if (getActiveSource().isValid()) {
             return getActiveSource().logicalAddress;
         }