content: /*
   * Copyright (C) 2019 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.google.android.exoplayer2.drm;
  
  import android.media.MediaDrmException;
  import android.os.PersistableBundle;
  import androidx.annotation.Nullable;
  import androidx.annotation.RequiresApi;
  import com.google.android.exoplayer2.C;
  import com.google.android.exoplayer2.decoder.CryptoConfig;
  import com.google.android.exoplayer2.util.Util;
  import java.util.HashMap;
  import java.util.List;
  import java.util.Map;
  
  /** An {@link ExoMediaDrm} that does not support any protection schemes. */
  @RequiresApi(18)
  public final class DummyExoMediaDrm implements ExoMediaDrm {
  
    /** Returns a new instance. */
    public static DummyExoMediaDrm getInstance() {
      return new DummyExoMediaDrm();
    }
  
    @Override
    public void setOnEventListener(@Nullable OnEventListener listener) {
      // Do nothing.
    }
  
    @Override
    public void setOnKeyStatusChangeListener(@Nullable OnKeyStatusChangeListener listener) {
      // Do nothing.
    }
  
    @Override
    public void setOnExpirationUpdateListener(@Nullable OnExpirationUpdateListener listener) {
      // Do nothing.
    }
  
    @Override
    public byte[] openSession() throws MediaDrmException {
      throw new MediaDrmException("Attempting to open a session using a dummy ExoMediaDrm.");
    }
  
    @Override
    public void closeSession(byte[] sessionId) {
      // Do nothing.
    }
  
    @Override
    public KeyRequest getKeyRequest(
        byte[] scope,
        @Nullable List<DrmInitData.SchemeData> schemeDatas,
        int keyType,
        @Nullable HashMap<String, String> optionalParameters) {
      // Should not be invoked. No session should exist.
      throw new IllegalStateException();
    }
  
    @Override
    @Nullable
    public byte[] provideKeyResponse(byte[] scope, byte[] response) {
      // Should not be invoked. No session should exist.
      throw new IllegalStateException();
    }
  
    @Override
    public ProvisionRequest getProvisionRequest() {
      // Should not be invoked. No provision should be required.
      throw new IllegalStateException();
    }
  
    @Override
    public void provideProvisionResponse(byte[] response) {
      // Should not be invoked. No provision should be required.
      throw new IllegalStateException();
    }
  
    @Override
    public Map<String, String> queryKeyStatus(byte[] sessionId) {
      // Should not be invoked. No session should exist.
      throw new IllegalStateException();
    }
  
    @Override
    public boolean requiresSecureDecoder(byte[] sessionId, String mimeType) {
      // Should not be invoked. No session should exist.
      throw new IllegalStateException();
    }
  
    @Override
    public void acquire() {
      // Do nothing.
    }
  
    @Override
    public void release() {
      // Do nothing.
    }
  
    @Override
    public void restoreKeys(byte[] sessionId, byte[] keySetId) {
      // Should not be invoked. No session should exist.
      throw new IllegalStateException();
    }
  
    @Override
    @Nullable
    public PersistableBundle getMetrics() {
      return null;
    }
  
    @Override
    public String getPropertyString(String propertyName) {
      return "";
    }
  
    @Override
    public byte[] getPropertyByteArray(String propertyName) {
      return Util.EMPTY_BYTE_ARRAY;
    }
  
    @Override
    public void setPropertyString(String propertyName, String value) {
      // Do nothing.
    }
  
    @Override
    public void setPropertyByteArray(String propertyName, byte[] value) {
      // Do nothing.
    }
  
    @Override
    public CryptoConfig createCryptoConfig(byte[] sessionId) {
      // Should not be invoked. No session should exist.
      throw new IllegalStateException();
    }
  
    @Override
    public @C.CryptoType int getCryptoType() {
      return C.CRYPTO_TYPE_UNSUPPORTED;
    }
  }
  