Add test for DefaultEncoderFactory.

PiperOrigin-RevId: 435009545

libraries/transformer/src/test/java/androidx/media3/transformer/DefaultEncoderFactoryTest.java

+/*
+ * 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 androidx.media3.transformer;
+
+import static com.google.common.truth.Truth.assertThat;
+import static org.junit.Assert.assertThrows;
+
+import android.media.MediaCodecInfo;
+import android.media.MediaFormat;
+import androidx.media3.common.Format;
+import androidx.media3.common.MimeTypes;
+import androidx.test.ext.junit.runners.AndroidJUnit4;
+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 DefaultEncoderFactory}. */
+@RunWith(AndroidJUnit4.class)
+public class DefaultEncoderFactoryTest {
+
+  @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 createForVideoEncoding_withFallbackOnAndSupportedInputFormat_configuresEncoder()
+      throws Exception {
+    Format requestedVideoFormat = createVideoFormat(MimeTypes.VIDEO_H264, 1920, 1080, 30);
+    Format actualVideoFormat =
+        new DefaultEncoderFactory()
+            .createForVideoEncoding(
+                requestedVideoFormat,
+                /* allowedMimeTypes= */ ImmutableList.of(MimeTypes.VIDEO_H264))
+            .getConfigurationFormat();
+
+    assertThat(actualVideoFormat.sampleMimeType).isEqualTo(MimeTypes.VIDEO_H264);
+    assertThat(actualVideoFormat.width).isEqualTo(1920);
+    assertThat(actualVideoFormat.height).isEqualTo(1080);
+    // 1920 * 1080 * 30 * 0.1
+    assertThat(actualVideoFormat.averageBitrate).isEqualTo(6_220_800);
+  }
+
+  @Test
+  public void createForVideoEncoding_withFallbackOnAndUnsupportedMimeType_configuresEncoder()
+      throws Exception {
+    Format requestedVideoFormat = createVideoFormat(MimeTypes.VIDEO_H265, 1920, 1080, 30);
+    Format actualVideoFormat =
+        new DefaultEncoderFactory()
+            .createForVideoEncoding(
+                requestedVideoFormat,
+                /* allowedMimeTypes= */ ImmutableList.of(MimeTypes.VIDEO_H264))
+            .getConfigurationFormat();
+
+    assertThat(actualVideoFormat.sampleMimeType).isEqualTo(MimeTypes.VIDEO_H264);
+    assertThat(actualVideoFormat.width).isEqualTo(1920);
+    assertThat(actualVideoFormat.height).isEqualTo(1080);
+    // 1920 * 1080 * 30 * 0.1
+    assertThat(actualVideoFormat.averageBitrate).isEqualTo(6_220_800);
+  }
+
+  @Test
+  public void createForVideoEncoding_withFallbackOnAndUnsupportedResolution_configuresEncoder()
+      throws Exception {
+    Format requestedVideoFormat = createVideoFormat(MimeTypes.VIDEO_H264, 3840, 2160, 60);
+    Format actualVideoFormat =
+        new DefaultEncoderFactory()
+            .createForVideoEncoding(
+                requestedVideoFormat,
+                /* allowedMimeTypes= */ ImmutableList.of(MimeTypes.VIDEO_H264))
+            .getConfigurationFormat();
+
+    assertThat(actualVideoFormat.width).isEqualTo(1920);
+    assertThat(actualVideoFormat.height).isEqualTo(1080);
+  }
+
+  @Test
+  public void createForVideoEncoding_withNoSupportedEncoder_throws() {
+    Format requestedVideoFormat = createVideoFormat(MimeTypes.VIDEO_H264, 1920, 1080, 30);
+    assertThrows(
+        TransformationException.class,
+        () ->
+            new DefaultEncoderFactory()
+                .createForVideoEncoding(
+                    requestedVideoFormat,
+                    /* allowedMimeTypes= */ ImmutableList.of(MimeTypes.VIDEO_H265)));
+  }
+
+  @Test
+  public void createForVideoEncoding_withNoAvailableEncoderFromEncoderSelector_throws() {
+    Format requestedVideoFormat = createVideoFormat(MimeTypes.VIDEO_H264, 1920, 1080, 30);
+    assertThrows(
+        TransformationException.class,
+        () ->
+            new DefaultEncoderFactory(
+                    /* videoEncoderSelector= */ mimeType -> ImmutableList.of(),
+                    /* enableFallback= */ true)
+                .createForVideoEncoding(
+                    requestedVideoFormat,
+                    /* allowedMimeTypes= */ ImmutableList.of(MimeTypes.VIDEO_H264)));
+  }
+
+  private static Format createVideoFormat(String mimeType, int width, int height, int frameRate) {
+    return new Format.Builder()
+        .setWidth(width)
+        .setHeight(height)
+        .setFrameRate(frameRate)
+        .setRotationDegrees(0)
+        .setSampleMimeType(mimeType)
+        .build();
+  }
+}