content: /*
   * Copyright (C) 2020 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.source.dash.manifest;
  
  import static com.google.common.truth.Truth.assertThat;
  
  import androidx.test.ext.junit.runners.AndroidJUnit4;
  import com.google.android.exoplayer2.C;
  import org.junit.Test;
  import org.junit.runner.RunWith;
  
  /** Unit test for {@link SegmentBase}. */
  @RunWith(AndroidJUnit4.class)
  public final class SegmentBaseTest {
  
    @Test
    public void getFirstAvailableSegmentNum_unboundedSegmentTemplate() {
      long periodStartUnixTimeUs = 123_000_000_000_000L;
      SegmentBase.SegmentTemplate segmentTemplate =
          new SegmentBase.SegmentTemplate(
              /* initialization= */ null,
              /* timescale= */ 1000,
              /* presentationTimeOffset= */ 0,
              /* startNumber= */ 42,
              /* endNumber= */ C.INDEX_UNSET,
              /* duration= */ 2000,
              /* segmentTimeline= */ null,
              /* availabilityTimeOffsetUs= */ 500_000,
              /* initializationTemplate= */ null,
              /* mediaTemplate= */ null,
              /* timeShiftBufferDepthUs= */ 6_000_000,
              /* periodStartUnixTimeUs= */ periodStartUnixTimeUs);
  
      assertThat(
              segmentTemplate.getFirstAvailableSegmentNum(
                  /* periodDurationUs= */ C.TIME_UNSET,
                  /* nowUnixTimeUs= */ periodStartUnixTimeUs - 10_000_000))
          .isEqualTo(42);
      assertThat(
              segmentTemplate.getFirstAvailableSegmentNum(
                  /* periodDurationUs= */ C.TIME_UNSET, /* nowUnixTimeUs= */ periodStartUnixTimeUs))
          .isEqualTo(42);
      assertThat(
              segmentTemplate.getFirstAvailableSegmentNum(
                  /* periodDurationUs= */ C.TIME_UNSET,
                  /* nowUnixTimeUs= */ periodStartUnixTimeUs + 7_999_999))
          .isEqualTo(42);
      assertThat(
              segmentTemplate.getFirstAvailableSegmentNum(
                  /* periodDurationUs= */ C.TIME_UNSET,
                  /* nowUnixTimeUs= */ periodStartUnixTimeUs + 8_000_000))
          .isEqualTo(43);
      assertThat(
              segmentTemplate.getFirstAvailableSegmentNum(
                  /* periodDurationUs= */ C.TIME_UNSET,
                  /* nowUnixTimeUs= */ periodStartUnixTimeUs + 9_999_999))
          .isEqualTo(43);
      assertThat(
              segmentTemplate.getFirstAvailableSegmentNum(
                  /* periodDurationUs= */ C.TIME_UNSET,
                  /* nowUnixTimeUs= */ periodStartUnixTimeUs + 10_000_000))
          .isEqualTo(44);
    }
  
    @Test
    public void getAvailableSegmentCount_unboundedSegmentTemplate() {
      long periodStartUnixTimeUs = 123_000_000_000_000L;
      SegmentBase.SegmentTemplate segmentTemplate =
          new SegmentBase.SegmentTemplate(
              /* initialization= */ null,
              /* timescale= */ 1000,
              /* presentationTimeOffset= */ 0,
              /* startNumber= */ 42,
              /* endNumber= */ C.INDEX_UNSET,
              /* duration= */ 2000,
              /* segmentTimeline= */ null,
              /* availabilityTimeOffsetUs= */ 500_000,
              /* initializationTemplate= */ null,
              /* mediaTemplate= */ null,
              /* timeShiftBufferDepthUs= */ 6_000_000,
              /* periodStartUnixTimeUs= */ periodStartUnixTimeUs);
  
      assertThat(
              segmentTemplate.getAvailableSegmentCount(
                  /* periodDurationUs= */ C.TIME_UNSET,
                  /* nowUnixTimeUs= */ periodStartUnixTimeUs - 10_000_000))
          .isEqualTo(0);
      assertThat(
              segmentTemplate.getAvailableSegmentCount(
                  /* periodDurationUs= */ C.TIME_UNSET, /* nowUnixTimeUs= */ periodStartUnixTimeUs))
          .isEqualTo(0);
      assertThat(
              segmentTemplate.getAvailableSegmentCount(
                  /* periodDurationUs= */ C.TIME_UNSET,
                  /* nowUnixTimeUs= */ periodStartUnixTimeUs + 1_499_999))
          .isEqualTo(0);
      assertThat(
              segmentTemplate.getAvailableSegmentCount(
                  /* periodDurationUs= */ C.TIME_UNSET,
                  /* nowUnixTimeUs= */ periodStartUnixTimeUs + 1_500_000))
          .isEqualTo(1);
      assertThat(
              segmentTemplate.getAvailableSegmentCount(
                  /* periodDurationUs= */ C.TIME_UNSET,
                  /* nowUnixTimeUs= */ periodStartUnixTimeUs + 7_499_999))
          .isEqualTo(3);
      assertThat(
              segmentTemplate.getAvailableSegmentCount(
                  /* periodDurationUs= */ C.TIME_UNSET,
                  /* nowUnixTimeUs= */ periodStartUnixTimeUs + 7_500_000))
          .isEqualTo(4);
      assertThat(
              segmentTemplate.getAvailableSegmentCount(
                  /* periodDurationUs= */ C.TIME_UNSET,
                  /* nowUnixTimeUs= */ periodStartUnixTimeUs + 7_999_999))
          .isEqualTo(4);
      assertThat(
              segmentTemplate.getAvailableSegmentCount(
                  /* periodDurationUs= */ C.TIME_UNSET,
                  /* nowUnixTimeUs= */ periodStartUnixTimeUs + 8_000_000))
          .isEqualTo(3);
    }
  
    @Test
    public void getNextSegmentShiftTimeUse_unboundedSegmentTemplate() {
      long periodStartUnixTimeUs = 123_000_000_000_000L;
      SegmentBase.SegmentTemplate segmentTemplate =
          new SegmentBase.SegmentTemplate(
              /* initialization= */ null,
              /* timescale= */ 1000,
              /* presentationTimeOffset= */ 0,
              /* startNumber= */ 42,
              /* endNumber= */ C.INDEX_UNSET,
              /* duration= */ 2000,
              /* segmentTimeline= */ null,
              /* availabilityTimeOffsetUs= */ 500_000,
              /* initializationTemplate= */ null,
              /* mediaTemplate= */ null,
              /* timeShiftBufferDepthUs= */ 6_000_000,
              /* periodStartUnixTimeUs= */ periodStartUnixTimeUs);
  
      assertThat(
              segmentTemplate.getNextSegmentAvailableTimeUs(
                  /* periodDurationUs= */ C.TIME_UNSET,
                  /* nowUnixTimeUs= */ periodStartUnixTimeUs - 10_000_000))
          .isEqualTo(1_500_000);
      assertThat(
              segmentTemplate.getNextSegmentAvailableTimeUs(
                  /* periodDurationUs= */ C.TIME_UNSET, /* nowUnixTimeUs= */ periodStartUnixTimeUs))
          .isEqualTo(1_500_000);
      assertThat(
              segmentTemplate.getNextSegmentAvailableTimeUs(
                  /* periodDurationUs= */ C.TIME_UNSET,
                  /* nowUnixTimeUs= */ periodStartUnixTimeUs + 1_499_999))
          .isEqualTo(1_500_000);
      assertThat(
              segmentTemplate.getNextSegmentAvailableTimeUs(
                  /* periodDurationUs= */ C.TIME_UNSET,
                  /* nowUnixTimeUs= */ periodStartUnixTimeUs + 1_500_000))
          .isEqualTo(3_500_000);
      assertThat(
              segmentTemplate.getNextSegmentAvailableTimeUs(
                  /* periodDurationUs= */ C.TIME_UNSET,
                  /* nowUnixTimeUs= */ periodStartUnixTimeUs + 17_499_999))
          .isEqualTo(17_500_000);
      assertThat(
              segmentTemplate.getNextSegmentAvailableTimeUs(
                  /* periodDurationUs= */ C.TIME_UNSET,
                  /* nowUnixTimeUs= */ periodStartUnixTimeUs + 17_500_000))
          .isEqualTo(19_500_000);
    }
  
    /** Regression test for https://github.com/google/ExoPlayer/issues/8804. */
    @Test
    public void getSegmentCount_withSegmentTemplate_avoidsIncorrectRounding() {
      SegmentBase.SegmentTemplate segmentTemplate =
          new SegmentBase.SegmentTemplate(
              /* initialization= */ null,
              /* timescale= */ 90000,
              /* presentationTimeOffset= */ 0,
              /* startNumber= */ 0,
              /* endNumber= */ C.INDEX_UNSET,
              /* duration= */ 179989,
              /* segmentTimeline= */ null,
              /* availabilityTimeOffsetUs= */ C.TIME_UNSET,
              /* initializationTemplate= */ null,
              /* mediaTemplate= */ null,
              /* timeShiftBufferDepthUs= */ C.TIME_UNSET,
              /* periodStartUnixTimeUs= */ C.TIME_UNSET);
      assertThat(segmentTemplate.getSegmentCount(2931820000L)).isEqualTo(1466);
    }
  
    @Test
    public void getSegmentCount_withSegmentTemplate_avoidsOverflow() {
      SegmentBase.SegmentTemplate segmentTemplate =
          new SegmentBase.SegmentTemplate(
              /* initialization= */ null,
              /* timescale= */ 1000000,
              /* presentationTimeOffset= */ 0,
              /* startNumber= */ 0,
              /* endNumber= */ C.INDEX_UNSET,
              /* duration= */ 179989,
              /* segmentTimeline= */ null,
              /* availabilityTimeOffsetUs= */ C.TIME_UNSET,
              /* initializationTemplate= */ null,
              /* mediaTemplate= */ null,
              /* timeShiftBufferDepthUs= */ C.TIME_UNSET,
              /* periodStartUnixTimeUs= */ C.TIME_UNSET);
      assertThat(segmentTemplate.getSegmentCount(1618875028000000L)).isEqualTo(8994299808L);
    }
  }
  