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.google.android.exoplayer2.extractor.mp4;
  
  import static com.google.android.exoplayer2.C.WIDEVINE_UUID;
  import static com.google.android.exoplayer2.extractor.mp4.Atom.TYPE_pssh;
  import static com.google.android.exoplayer2.extractor.mp4.Atom.parseFullAtomFlags;
  import static com.google.android.exoplayer2.extractor.mp4.Atom.parseFullAtomVersion;
  import static com.google.common.truth.Truth.assertThat;
  
  import androidx.test.ext.junit.runners.AndroidJUnit4;
  import com.google.android.exoplayer2.C;
  import com.google.android.exoplayer2.util.ParsableByteArray;
  import java.util.UUID;
  import org.junit.Test;
  import org.junit.runner.RunWith;
  
  /** Tests for {@link PsshAtomUtil}. */
  @RunWith(AndroidJUnit4.class)
  public final class PsshAtomUtilTest {
  
    @Test
    public void buildPsshAtom() {
      byte[] schemeData = new byte[] {0, 1, 2, 3, 4, 5};
      byte[] psshAtom = PsshAtomUtil.buildPsshAtom(C.WIDEVINE_UUID, schemeData);
      // Read the PSSH atom back and assert its content is as expected.
      ParsableByteArray parsablePsshAtom = new ParsableByteArray(psshAtom);
      assertThat(parsablePsshAtom.readUnsignedIntToInt()).isEqualTo(psshAtom.length); // length
      assertThat(parsablePsshAtom.readInt()).isEqualTo(TYPE_pssh); // type
      int fullAtomInt = parsablePsshAtom.readInt(); // version + flags
      assertThat(parseFullAtomVersion(fullAtomInt)).isEqualTo(0);
      assertThat(parseFullAtomFlags(fullAtomInt)).isEqualTo(0);
      UUID systemId = new UUID(parsablePsshAtom.readLong(), parsablePsshAtom.readLong());
      assertThat(systemId).isEqualTo(WIDEVINE_UUID);
      assertThat(parsablePsshAtom.readUnsignedIntToInt()).isEqualTo(schemeData.length);
      byte[] psshSchemeData = new byte[schemeData.length];
      parsablePsshAtom.readBytes(psshSchemeData, 0, schemeData.length);
      assertThat(psshSchemeData).isEqualTo(schemeData);
    }
  }
  