Use getSupportedWidth/HeightFor() API for finding resolution.

Previously, we've used getSupportedHeights/Widths() to find the supported
resolution. However, the height/width can be over-reported when using these
APIs. For example, getSupportedWidths and getSupportedHeights can both return
3840, but the supported height when using 3840 as width is only 2160.

PiperOrigin-RevId: 432926192

library/transformer/src/main/java/com/google/android/exoplayer2/transformer/EncoderUtil.java

@@ -90,18 +90,13 @@ public final class EncoderUtil {
     }
 
     // Fix frame being too wide or too tall.
-    int adjustedHeight = videoEncoderCapabilities.getSupportedHeights().clamp(height);
+    width = videoEncoderCapabilities.getSupportedWidths().clamp(width);
+    int adjustedHeight = videoEncoderCapabilities.getSupportedHeightsFor(width).clamp(height);
     if (adjustedHeight != height) {
       width = (int) round((double) width * adjustedHeight / height);
       height = adjustedHeight;
     }
 
-    int adjustedWidth = videoEncoderCapabilities.getSupportedWidths().clamp(width);
-    if (adjustedWidth != width) {
-      height = (int) round((double) height * adjustedWidth / width);
-      width = adjustedWidth;
-    }
-
     // Fix pixel alignment.
     width = alignResolution(width, videoEncoderCapabilities.getWidthAlignment());
     height = alignResolution(height, videoEncoderCapabilities.getHeightAlignment());

library/transformer/src/test/java/com/google/android/exoplayer2/transformer/EncoderUtilTest.java

@@ -0,0 +1,89 @@
+/*
+ * 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.Pair;
+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 getClosestSupportedResolution_withSupportedResolution_succeeds() {
+    ImmutableList<MediaCodecInfo> supportedEncoders = EncoderUtil.getSupportedEncoders(MIME_TYPE);
+    MediaCodecInfo encoderInfo = supportedEncoders.get(0);
+
+    @Nullable
+    Pair<Integer, Integer> closestSupportedResolution =
+        EncoderUtil.getClosestSupportedResolution(encoderInfo, MIME_TYPE, 1920, 1080);
+
+    assertThat(closestSupportedResolution).isNotNull();
+    assertThat(closestSupportedResolution).isEqualTo(Pair.create(1920, 1080));
+  }
+
+  @Test
+  public void getClosestSupportedResolution_withWidthTooBig_findsMostCloselySupportedResolution() {
+    ImmutableList<MediaCodecInfo> supportedEncoders = EncoderUtil.getSupportedEncoders(MIME_TYPE);
+    MediaCodecInfo encoderInfo = supportedEncoders.get(0);
+
+    @Nullable
+    Pair<Integer, Integer> closestSupportedResolution =
+        EncoderUtil.getClosestSupportedResolution(encoderInfo, MIME_TYPE, 1920, 1920);
+
+    assertThat(closestSupportedResolution).isNotNull();
+    assertThat(closestSupportedResolution).isEqualTo(Pair.create(1088, 1088));
+  }
+}