content: /*
   * Copyright (C) 2016 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.ext.opus;
  
  import androidx.annotation.Nullable;
  import com.google.android.exoplayer2.C;
  import com.google.android.exoplayer2.ExoPlayerLibraryInfo;
  import com.google.android.exoplayer2.util.LibraryLoader;
  
  /** Configures and queries the underlying native library. */
  public final class OpusLibrary {
  
    static {
      ExoPlayerLibraryInfo.registerModule("goog.exo.opus");
    }
  
    private static final LibraryLoader LOADER =
        new LibraryLoader("opusV2JNI") {
          @Override
          protected void loadLibrary(String name) {
            System.loadLibrary(name);
          }
        };
  
    private static @C.CryptoType int cryptoType = C.CRYPTO_TYPE_UNSUPPORTED;
  
    private OpusLibrary() {}
  
    /**
     * Override the names of the Opus native libraries. If an application wishes to call this method,
     * it must do so before calling any other method defined by this class, and before instantiating a
     * {@link LibopusAudioRenderer} instance.
     *
     * @param cryptoType The {@link C.CryptoType} for which the decoder library supports decrypting
     *     protected content, or {@link C#CRYPTO_TYPE_UNSUPPORTED} if the library does not support
     *     decryption.
     * @param libraries The names of the Opus native libraries.
     */
    public static void setLibraries(@C.CryptoType int cryptoType, String... libraries) {
      OpusLibrary.cryptoType = cryptoType;
      LOADER.setLibraries(libraries);
    }
  
    /** Returns whether the underlying library is available, loading it if necessary. */
    public static boolean isAvailable() {
      return LOADER.isAvailable();
    }
  
    /** Returns the version of the underlying library if available, or null otherwise. */
    @Nullable
    public static String getVersion() {
      return isAvailable() ? opusGetVersion() : null;
    }
  
    /** Returns whether the library supports the given {@link C.CryptoType}. */
    public static boolean supportsCryptoType(@C.CryptoType int cryptoType) {
      return cryptoType == C.CRYPTO_TYPE_NONE
          || (cryptoType != C.CRYPTO_TYPE_UNSUPPORTED && cryptoType == OpusLibrary.cryptoType);
    }
  
    public static native String opusGetVersion();
  
    public static native boolean opusIsSecureDecodeSupported();
  }
  