content: /*
   * Copyright 2022 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.transformer;
  
  import static com.google.common.truth.Truth.assertThat;
  
  import android.media.MediaCodecInfo;
  import android.media.MediaFormat;
  import android.util.Size;
  import androidx.annotation.Nullable;
  import androidx.test.ext.junit.runners.AndroidJUnit4;
  import com.google.android.exoplayer2.util.MimeTypes;
  import com.google.common.collect.ImmutableList;
  import org.junit.Before;
  import org.junit.Test;
  import org.junit.runner.RunWith;
  import org.robolectric.shadows.MediaCodecInfoBuilder;
  import org.robolectric.shadows.ShadowMediaCodecList;
  
  /** Unit test for {@link EncoderUtil}. */
  @RunWith(AndroidJUnit4.class)
  public class EncoderUtilTest {
    private static final String MIME_TYPE = MimeTypes.VIDEO_H264;
  
    @Before
    public void setUp() {
      MediaFormat avcFormat = new MediaFormat();
      avcFormat.setString(MediaFormat.KEY_MIME, MediaFormat.MIMETYPE_VIDEO_AVC);
      MediaCodecInfo.CodecProfileLevel profileLevel = new MediaCodecInfo.CodecProfileLevel();
      profileLevel.profile = MediaCodecInfo.CodecProfileLevel.AVCProfileHigh;
      // Using Level4 gives us 8192 16x16 blocks. If using width 1920 uses 120 blocks, 8192 / 120 = 68
      // blocks will be left for encoding height 1088.
      profileLevel.level = MediaCodecInfo.CodecProfileLevel.AVCLevel4;
  
      ShadowMediaCodecList.addCodec(
          MediaCodecInfoBuilder.newBuilder()
              .setName("test.transformer.avc.encoder")
              .setIsEncoder(true)
              .setCapabilities(
                  MediaCodecInfoBuilder.CodecCapabilitiesBuilder.newBuilder()
                      .setMediaFormat(avcFormat)
                      .setIsEncoder(true)
                      .setColorFormats(
                          new int[] {MediaCodecInfo.CodecCapabilities.COLOR_FormatYUV420Flexible})
                      .setProfileLevels(new MediaCodecInfo.CodecProfileLevel[] {profileLevel})
                      .build())
              .build());
    }
  
    @Test
    public void getSupportedResolution_withSupportedResolution_succeeds() {
      ImmutableList<MediaCodecInfo> supportedEncoders = EncoderUtil.getSupportedEncoders(MIME_TYPE);
      MediaCodecInfo encoderInfo = supportedEncoders.get(0);
  
      @Nullable
      Size closestSupportedResolution =
          EncoderUtil.getSupportedResolution(encoderInfo, MIME_TYPE, 1920, 1080);
  
      assertThat(closestSupportedResolution).isNotNull();
      assertThat(closestSupportedResolution.getWidth()).isEqualTo(1920);
      assertThat(closestSupportedResolution.getHeight()).isEqualTo(1080);
    }
  
    @Test
    public void getSupportedResolution_withUnalignedSize_findsMostCloselySupportedResolution() {
      ImmutableList<MediaCodecInfo> supportedEncoders = EncoderUtil.getSupportedEncoders(MIME_TYPE);
      MediaCodecInfo encoderInfo = supportedEncoders.get(0);
  
      @Nullable
      Size closestSupportedResolution =
          EncoderUtil.getSupportedResolution(encoderInfo, MIME_TYPE, 1919, 1081);
  
      assertThat(closestSupportedResolution).isNotNull();
      assertThat(closestSupportedResolution.getWidth()).isEqualTo(1920);
      assertThat(closestSupportedResolution.getHeight()).isEqualTo(1080);
    }
  
    @Test
    public void getSupportedResolution_withWidthTooBig_findsTwoThirdsOfTheOriginalSize() {
      ImmutableList<MediaCodecInfo> supportedEncoders = EncoderUtil.getSupportedEncoders(MIME_TYPE);
      MediaCodecInfo encoderInfo = supportedEncoders.get(0);
  
      @Nullable
      Size closestSupportedResolution =
          EncoderUtil.getSupportedResolution(encoderInfo, MIME_TYPE, 1920, 1920);
  
      assertThat(closestSupportedResolution).isNotNull();
      assertThat(closestSupportedResolution.getWidth()).isEqualTo(1440);
      assertThat(closestSupportedResolution.getHeight()).isEqualTo(1440);
    }
  
    @Test
    public void getSupportedResolution_withWidthTooBig2_findsHalfOfTheOriginalSize() {
      ImmutableList<MediaCodecInfo> supportedEncoders = EncoderUtil.getSupportedEncoders(MIME_TYPE);
      MediaCodecInfo encoderInfo = supportedEncoders.get(0);
  
      @Nullable
      Size closestSupportedResolution =
          EncoderUtil.getSupportedResolution(encoderInfo, MIME_TYPE, 3840, 2160);
  
      assertThat(closestSupportedResolution).isNotNull();
      assertThat(closestSupportedResolution.getWidth()).isEqualTo(1920);
      assertThat(closestSupportedResolution.getHeight()).isEqualTo(1080);
    }
  }
  