content: /**
   * Copyright (C) 2017 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.broadcastradio.hal1;
  
  import android.annotation.NonNull;
  import android.annotation.Nullable;
  import android.hardware.radio.ITuner;
  import android.hardware.radio.ITunerCallback;
  import android.hardware.radio.ProgramList;
  import android.hardware.radio.ProgramSelector;
  import android.hardware.radio.RadioManager;
  import android.hardware.radio.RadioMetadata;
  import android.hardware.radio.RadioTuner;
  import android.os.IBinder;
  import android.os.RemoteException;
  import android.util.Slog;
  
  import java.util.List;
  import java.util.Map;
  import java.util.Objects;
  import java.util.Set;
  import java.util.concurrent.atomic.AtomicReference;
  import java.util.stream.Collectors;
  
  class TunerCallback implements ITunerCallback {
      private static final String TAG = "BroadcastRadioService.TunerCallback";
  
      /**
       * This field is used by native code, do not access or modify.
       */
      private final long mNativeContext;
  
      @NonNull private final Tuner mTuner;
      @NonNull private final ITunerCallback mClientCallback;
  
      private final AtomicReference<ProgramList.Filter> mProgramListFilter = new AtomicReference<>();
      private boolean mInitialConfigurationDone = false;
  
      TunerCallback(@NonNull Tuner tuner, @NonNull ITunerCallback clientCallback, int halRev) {
          mTuner = tuner;
          mClientCallback = clientCallback;
          mNativeContext = nativeInit(tuner, halRev);
      }
  
      @Override
      protected void finalize() throws Throwable {
          nativeFinalize(mNativeContext);
          super.finalize();
      }
  
      private native long nativeInit(@NonNull Tuner tuner, int halRev);
      private native void nativeFinalize(long nativeContext);
      private native void nativeDetach(long nativeContext);
  
      public void detach() {
          nativeDetach(mNativeContext);
      }
  
      private interface RunnableThrowingRemoteException {
          void run() throws RemoteException;
      }
  
      private void dispatch(RunnableThrowingRemoteException func) {
          try {
              func.run();
          } catch (RemoteException e) {
              Slog.e(TAG, "client died", e);
          }
      }
  
      // called from native side
      private void handleHwFailure() {
          onError(RadioTuner.ERROR_HARDWARE_FAILURE);
          mTuner.close();
      }
  
      void startProgramListUpdates(@Nullable ProgramList.Filter filter) {
          if (filter == null) filter = new ProgramList.Filter();
          mProgramListFilter.set(filter);
          sendProgramListUpdate();
      }
  
      void stopProgramListUpdates() {
          mProgramListFilter.set(null);
      }
  
      boolean isInitialConfigurationDone() {
          return mInitialConfigurationDone;
      }
  
      @Override
      public void onError(int status) {
          dispatch(() -> mClientCallback.onError(status));
      }
  
      @Override
      public void onTuneFailed(int result, ProgramSelector selector) {
          Slog.e(TAG, "Not applicable for HAL 1.x");
      }
  
      @Override
      public void onConfigurationChanged(RadioManager.BandConfig config) {
          mInitialConfigurationDone = true;
          dispatch(() -> mClientCallback.onConfigurationChanged(config));
      }
  
      @Override
      public void onCurrentProgramInfoChanged(RadioManager.ProgramInfo info) {
          dispatch(() -> mClientCallback.onCurrentProgramInfoChanged(info));
      }
  
      @Override
      public void onTrafficAnnouncement(boolean active) {
          dispatch(() -> mClientCallback.onTrafficAnnouncement(active));
      }
  
      @Override
      public void onEmergencyAnnouncement(boolean active) {
          dispatch(() -> mClientCallback.onEmergencyAnnouncement(active));
      }
  
      @Override
      public void onAntennaState(boolean connected) {
          dispatch(() -> mClientCallback.onAntennaState(connected));
      }
  
      @Override
      public void onBackgroundScanAvailabilityChange(boolean isAvailable) {
          dispatch(() -> mClientCallback.onBackgroundScanAvailabilityChange(isAvailable));
      }
  
      @Override
      public void onBackgroundScanComplete() {
          dispatch(() -> mClientCallback.onBackgroundScanComplete());
      }
  
      @Override
      public void onProgramListChanged() {
          dispatch(() -> mClientCallback.onProgramListChanged());
          sendProgramListUpdate();
      }
  
      private void sendProgramListUpdate() {
          ProgramList.Filter filter = mProgramListFilter.get();
          if (filter == null) return;
  
          List<RadioManager.ProgramInfo> modified;
          try {
              modified = mTuner.getProgramList(filter.getVendorFilter());
          } catch (IllegalStateException ex) {
              Slog.d(TAG, "Program list not ready yet");
              return;
          }
          Set<RadioManager.ProgramInfo> modifiedSet = modified.stream().collect(Collectors.toSet());
          ProgramList.Chunk chunk = new ProgramList.Chunk(true, true, modifiedSet, null);
          dispatch(() -> mClientCallback.onProgramListUpdated(chunk));
      }
  
      @Override
      public void onProgramListUpdated(ProgramList.Chunk chunk) {
          dispatch(() -> mClientCallback.onProgramListUpdated(chunk));
      }
  
      @Override
      public void onParametersUpdated(Map parameters) {
          Slog.e(TAG, "Not applicable for HAL 1.x");
      }
  
      @Override
      public IBinder asBinder() {
          throw new RuntimeException("Not a binder");
      }
  }
  