Implement ADB command for OTP

adb shell cmd hdmi_control otp will launch HDMI-CEC feature "One Touch
Play". This equals a call to HdmiPlaybackClient#oneTouchPlay(..).

Bug: 173182293
Test: adb shell cmd hdmi_control otp; verify with cec-client

Change-Id: Ie9b71083718521c9cac9d7b341a47ae223f373b2

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

@@ -66,6 +66,8 @@ import android.os.Looper;
 import android.os.PowerManager;
 import android.os.RemoteCallbackList;
 import android.os.RemoteException;
+import android.os.ResultReceiver;
+import android.os.ShellCallback;
 import android.os.SystemClock;
 import android.os.SystemProperties;
 import android.os.UserHandle;
@@ -2290,6 +2292,16 @@ public class HdmiControlService extends SystemService {
             });
         }
 
+        @Override
+        public void onShellCommand(@Nullable FileDescriptor in, @Nullable FileDescriptor out,
+                @Nullable FileDescriptor err, String[] args,
+                @Nullable ShellCallback callback, ResultReceiver resultReceiver)
+                throws RemoteException {
+            enforceAccessPermission();
+            new HdmiControlShellCommand(this)
+                    .exec(this, in, out, err, args, callback, resultReceiver);
+        }
+
         @Override
         protected void dump(FileDescriptor fd, final PrintWriter writer, String[] args) {
             if (!DumpUtils.checkDumpPermission(getContext(), TAG, writer)) return;

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

@@ -0,0 +1,107 @@
+/*
+ * Copyright (C) 2020 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.hdmi;
+
+
+import android.hardware.hdmi.HdmiControlManager;
+import android.hardware.hdmi.IHdmiControlCallback;
+import android.hardware.hdmi.IHdmiControlService;
+import android.os.RemoteException;
+import android.os.ShellCommand;
+import android.util.Slog;
+
+import java.io.PrintWriter;
+import java.util.concurrent.CountDownLatch;
+import java.util.concurrent.TimeUnit;
+import java.util.concurrent.atomic.AtomicInteger;
+
+final class HdmiControlShellCommand extends ShellCommand {
+
+    private static final String TAG = "HdmiShellCommand";
+
+    private final IHdmiControlService.Stub mBinderService;
+
+
+    HdmiControlShellCommand(IHdmiControlService.Stub binderService) {
+        mBinderService = binderService;
+    }
+
+    @Override
+    public int onCommand(String cmd) {
+        if (cmd == null) {
+            return handleDefaultCommands(cmd);
+        }
+
+        try {
+            return handleShellCommand(cmd);
+        } catch (Exception e) {
+            getErrPrintWriter().println(
+                    "Caught error for command '" + cmd + "': " + e.getMessage());
+            Slog.e(TAG, "Error handling hdmi_control shell command: " + cmd, e);
+            return 1;
+        }
+    }
+
+    @Override
+    public void onHelp() {
+        PrintWriter pw = getOutPrintWriter();
+
+        pw.println("HdmiControlManager (hdmi_control) commands:");
+        pw.println("  help");
+        pw.println("      Print this help text.");
+        pw.println("  onetouchplay, otp");
+        pw.println("      Send the \"One Touch Play\" feature from a source to the TV");
+    }
+
+    private int handleShellCommand(String cmd) throws RemoteException {
+        PrintWriter pw = getOutPrintWriter();
+
+        switch (cmd) {
+            case "otp":
+            case "onetouchplay":
+                return oneTouchPlay(pw);
+        }
+
+        getErrPrintWriter().println("Unhandled command: " + cmd);
+        return 1;
+    }
+
+    private int oneTouchPlay(PrintWriter pw) throws RemoteException {
+        final CountDownLatch latch = new CountDownLatch(1);
+        AtomicInteger cecResult = new AtomicInteger();
+        pw.print("Sending One Touch Play...");
+        mBinderService.oneTouchPlay(new IHdmiControlCallback.Stub() {
+            @Override
+            public void onComplete(int result) {
+                pw.println(" done (" + result + ")");
+                latch.countDown();
+                cecResult.set(result);
+            }
+        });
+
+        try {
+            if (!latch.await(HdmiConfig.TIMEOUT_MS, TimeUnit.MILLISECONDS)) {
+                getErrPrintWriter().println("One Touch Play timed out.");
+                return 1;
+            }
+        } catch (InterruptedException e) {
+            getErrPrintWriter().println("Caught InterruptedException");
+            Thread.currentThread().interrupt();
+        }
+        return cecResult.get() == HdmiControlManager.RESULT_SUCCESS ? 0 : 1;
+    }
+}