content: /*
   * Copyright (C) 2018 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 android.hardware.hdmi;
  
  import android.annotation.CallbackExecutor;
  import android.annotation.NonNull;
  import android.annotation.SystemApi;
  import android.hardware.hdmi.HdmiControlManager.ControlCallbackResult;
  import android.os.Binder;
  import android.os.RemoteException;
  import android.util.Log;
  
  import com.android.internal.util.Preconditions;
  
  import java.util.Collections;
  import java.util.List;
  import java.util.concurrent.Executor;
  
  /**
   * An {@code HdmiSwitchClient} represents a HDMI-CEC switch device.
   *
   * <p>HdmiSwitchClient has a CEC device type of HdmiDeviceInfo.DEVICE_PURE_CEC_SWITCH, but it is
   * used by all Android devices that have multiple HDMI inputs, even if it is not a "pure" swicth
   * and has another device type like TV or Player.
   *
   * @hide
   */
  @SystemApi
  public class HdmiSwitchClient extends HdmiClient {
  
      private static final String TAG = "HdmiSwitchClient";
  
      /* package */ HdmiSwitchClient(IHdmiControlService service) {
          super(service);
      }
  
      private static IHdmiControlCallback getCallbackWrapper(final OnSelectListener listener) {
          return new IHdmiControlCallback.Stub() {
              @Override
              public void onComplete(int result) {
                  listener.onSelect(result);
              }
          };
      }
  
      @Override
      public int getDeviceType() {
          return HdmiDeviceInfo.DEVICE_PURE_CEC_SWITCH;
      }
  
      /**
       * Selects a CEC logical device to be a new active source.
       *
       * @param logicalAddress logical address of the device to select
       * @param listener listener to get the result with
       *
       * @hide
       */
      public void selectDevice(int logicalAddress, @NonNull OnSelectListener listener) {
          Preconditions.checkNotNull(listener);
          try {
              mService.deviceSelect(logicalAddress, getCallbackWrapper(listener));
          } catch (RemoteException e) {
              Log.e(TAG, "failed to select device: ", e);
              throw e.rethrowFromSystemServer();
          }
      }
  
      /**
       * Selects a HDMI port to be a new route path.
       *
       * @param portId HDMI port to select
       * @see {@link android.media.tv.TvInputHardwareInfo#getHdmiPortId()}
       *     to get portId of a specific TV Input.
       * @param listener listener to get the result with
       *
       * @hide
       */
      @SystemApi
      public void selectPort(int portId, @NonNull OnSelectListener listener) {
          Preconditions.checkNotNull(listener);
          try {
              mService.portSelect(portId, getCallbackWrapper(listener));
          } catch (RemoteException e) {
              Log.e(TAG, "failed to select port: ", e);
              throw e.rethrowFromSystemServer();
          }
      }
  
      /**
       * Selects a CEC logical device to be a new active source.
       *
       * @param logicalAddress logical address of the device to select
       * @param executor executor to allow the develper to specify the thread upon which the listeners
       *     will be invoked
       * @param listener listener to get the result with
       *
       * @hide
       */
      public void selectDevice(
              int logicalAddress,
              @NonNull @CallbackExecutor Executor executor,
              @NonNull OnSelectListener listener) {
          Preconditions.checkNotNull(listener);
          try {
              mService.deviceSelect(logicalAddress,
                      new IHdmiControlCallback.Stub() {
                              @Override
                              public void onComplete(int result) {
                                  Binder.withCleanCallingIdentity(
                                          () -> executor.execute(() -> listener.onSelect(result)));
                              }
                      }
              );
          } catch (RemoteException e) {
              Log.e(TAG, "failed to select device: ", e);
              throw e.rethrowFromSystemServer();
          }
      }
  
      /**
       * Selects a HDMI port to be a new route path.
       *
       * @param portId HDMI port to select
       * @param executor executor to allow the develper to specify the thread upon which the listeners
       *     will be invoked
       * @param listener listener to get the result with
       *
       * @hide
       */
      @SystemApi
      public void selectPort(
              int portId,
              @NonNull @CallbackExecutor Executor executor,
              @NonNull OnSelectListener listener) {
          Preconditions.checkNotNull(listener);
          try {
              mService.portSelect(portId,
                      new IHdmiControlCallback.Stub() {
                              @Override
                              public void onComplete(int result) {
                                  Binder.withCleanCallingIdentity(
                                          () -> executor.execute(() -> listener.onSelect(result)));
                              }
                      }
              );
          } catch (RemoteException e) {
              Log.e(TAG, "failed to select port: ", e);
              throw e.rethrowFromSystemServer();
          }
      }
  
      /**
       * Returns all the CEC devices connected to the device.
       *
       * <p>This only applies to device with multiple HDMI inputs
       *
       * @return list of {@link HdmiDeviceInfo} for connected CEC devices. Empty list is returned if
       *     there is none.
       *
       * @hide
       */
      public List<HdmiDeviceInfo> getDeviceList() {
          try {
              return mService.getDeviceList();
          } catch (RemoteException e) {
              Log.e("TAG", "Failed to call getDeviceList():", e);
              return Collections.<HdmiDeviceInfo>emptyList();
          }
      }
  
      /**
       * Listener interface used to get the result of {@link #deviceSelect} or {@link #portSelect}.
       *
       * @hide
       */
      @SystemApi
      public interface OnSelectListener {
  
          /**
           * Called when the operation is finished.
           *
           * @param result callback result.
           * @see {@link ControlCallbackResult}
           */
          void onSelect(@ControlCallbackResult int result);
      }
  }
  