Add support for analyzing bitrates across devices.

Allows for input values to be propagated to the analysis file.

PiperOrigin-RevId: 438030322

libraries/transformer/src/androidTest/java/androidx/media3/transformer/TransformerAndroidTestRunner.java

@@ -30,6 +30,7 @@ import androidx.test.platform.app.InstrumentationRegistry;
 import java.io.File;
 import java.io.FileWriter;
 import java.io.IOException;
+import java.util.Map;
 import java.util.concurrent.CountDownLatch;
 import java.util.concurrent.TimeoutException;
 import java.util.concurrent.atomic.AtomicReference;
@@ -51,6 +52,7 @@ public class TransformerAndroidTestRunner {
     private boolean calculateSsim;
     private int timeoutSeconds;
     private boolean suppressAnalysisExceptions;
+    @Nullable private Map<String, Object> inputValues;
 
     /**
      * Creates a {@link Builder}.
@@ -114,10 +116,30 @@ public class TransformerAndroidTestRunner {
       return this;
     }
 
+    /**
+     * Sets a {@link Map} of transformer input values, which are propagated to the transformation
+     * summary JSON file.
+     *
+     * <p>Values in the map should be convertible according to {@link JSONObject#wrap(Object)} to be
+     * recorded properly in the summary file.
+     *
+     * @param inputValues A {@link Map} of values to be written to the transformation summary.
+     * @return This {@link Builder}.
+     */
+    public Builder setInputValues(@Nullable Map<String, Object> inputValues) {
+      this.inputValues = inputValues;
+      return this;
+    }
+
     /** Builds the {@link TransformerAndroidTestRunner}. */
     public TransformerAndroidTestRunner build() {
       return new TransformerAndroidTestRunner(
-          context, transformer, timeoutSeconds, calculateSsim, suppressAnalysisExceptions);
+          context,
+          transformer,
+          timeoutSeconds,
+          calculateSsim,
+          suppressAnalysisExceptions,
+          inputValues);
     }
   }
 
@@ -126,31 +148,35 @@ public class TransformerAndroidTestRunner {
   private final int timeoutSeconds;
   private final boolean calculateSsim;
   private final boolean suppressAnalysisExceptions;
+  @Nullable private final Map<String, Object> inputValues;
 
   private TransformerAndroidTestRunner(
       Context context,
       Transformer transformer,
       int timeoutSeconds,
       boolean calculateSsim,
-      boolean suppressAnalysisExceptions) {
+      boolean suppressAnalysisExceptions,
+      @Nullable Map<String, Object> inputValues) {
     this.context = context;
     this.transformer = transformer;
     this.timeoutSeconds = timeoutSeconds;
     this.calculateSsim = calculateSsim;
     this.suppressAnalysisExceptions = suppressAnalysisExceptions;
+    this.inputValues = inputValues;
   }
 
   /**
    * Transforms the {@code uriString}, saving a summary of the transformation to the application
    * cache.
    *
-   * @param testId An identifier for the test.
+   * @param testId A unique identifier for the transformer test run.
    * @param uriString The uri (as a {@link String}) of the file to transform.
    * @return The {@link TransformationTestResult}.
    * @throws Exception The cause of the transformation not completing.
    */
   public TransformationTestResult run(String testId, String uriString) throws Exception {
     JSONObject resultJson = new JSONObject();
+    resultJson.put("inputValues", JSONObject.wrap(inputValues));
     try {
       TransformationTestResult transformationTestResult = runInternal(testId, uriString);
       resultJson.put("transformationResult", getTestResultJson(transformationTestResult));

libraries/transformer/src/androidTest/java/androidx/media3/transformer/mh/analysis/BitrateAnalysisTest.java

@@ -0,0 +1,118 @@
+/*
+ * 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.mh.analysis;
+
+import static android.media.MediaCodecInfo.EncoderCapabilities.BITRATE_MODE_CBR;
+import static android.media.MediaCodecInfo.EncoderCapabilities.BITRATE_MODE_VBR;
+
+import android.content.Context;
+import androidx.media3.common.util.Assertions;
+import androidx.media3.transformer.AndroidTestUtil;
+import androidx.media3.transformer.DefaultEncoderFactory;
+import androidx.media3.transformer.EncoderSelector;
+import androidx.media3.transformer.Transformer;
+import androidx.media3.transformer.TransformerAndroidTestRunner;
+import androidx.media3.transformer.VideoEncoderSettings;
+import androidx.test.core.app.ApplicationProvider;
+import com.google.common.base.Splitter;
+import com.google.common.collect.ImmutableList;
+import com.google.common.collect.Iterables;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import org.checkerframework.checker.nullness.qual.MonotonicNonNull;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.junit.runners.Parameterized;
+import org.junit.runners.Parameterized.Parameter;
+import org.junit.runners.Parameterized.Parameters;
+
+/** Instrumentation tests for analysing output bitrate and quality for a given input bitrate. */
+@RunWith(Parameterized.class)
+public class BitrateAnalysisTest {
+  private static final ImmutableList<String> INPUT_FILES =
+      ImmutableList.of(
+          AndroidTestUtil.MP4_ASSET_WITH_INCREASING_TIMESTAMPS_URI_STRING,
+          AndroidTestUtil.MP4_REMOTE_4K60_PORTRAIT_URI_STRING);
+  private static final ImmutableList<Integer> INPUT_BITRATE_MODES =
+      ImmutableList.of(BITRATE_MODE_VBR, BITRATE_MODE_CBR);
+
+  private static final int START_BITRATE = 2_000_000;
+  private static final int END_BITRATE = 10_000_000;
+  private static final int BITRATE_INTERVAL = 1_000_000;
+
+  @Parameter(0)
+  public int bitrate;
+
+  @Parameter(1)
+  public int bitrateMode;
+
+  @Parameter(2)
+  public @MonotonicNonNull String fileUri;
+
+  @Parameters(name = "analyzeBitrate_{0}_{1}_{2}")
+  public static List<Object[]> parameters() {
+    List<Object[]> parameterList = new ArrayList<>();
+    for (int bitrate = START_BITRATE; bitrate <= END_BITRATE; bitrate += BITRATE_INTERVAL) {
+      for (int mode : INPUT_BITRATE_MODES) {
+        for (String file : INPUT_FILES) {
+          parameterList.add(new Object[] {bitrate, mode, file});
+        }
+      }
+    }
+
+    return parameterList;
+  }
+
+  @Test
+  public void analyzeBitrate() throws Exception {
+    Assertions.checkNotNull(fileUri);
+    String fileName = Assertions.checkNotNull(Iterables.getLast(Splitter.on("/").split(fileUri)));
+    String testId = String.format("analyzeBitrate_ssim_%s_%d_%s", bitrate, bitrateMode, fileName);
+
+    Map<String, Object> inputValues = new HashMap<>();
+    inputValues.put("targetBitrate", bitrate);
+    inputValues.put("inputFilename", fileName);
+    if (bitrateMode == BITRATE_MODE_CBR) {
+      inputValues.put("bitrateMode", "CBR");
+    } else if (bitrateMode == BITRATE_MODE_VBR) {
+      inputValues.put("bitrateMode", "VBR");
+    }
+
+    Context context = ApplicationProvider.getApplicationContext();
+    Transformer transformer =
+        new Transformer.Builder(context)
+            .setRemoveAudio(true)
+            .setEncoderFactory(
+                new DefaultEncoderFactory(
+                    EncoderSelector.DEFAULT,
+                    new VideoEncoderSettings.Builder()
+                        .setBitrate(bitrate)
+                        .setBitrateMode(bitrateMode)
+                        .build(),
+                    /* enableFallback= */ false))
+            .build();
+
+    inputValues.put("Transformer", transformer);
+
+    new TransformerAndroidTestRunner.Builder(context, transformer)
+        .setInputValues(inputValues)
+        .setCalculateSsim(true)
+        .build()
+        .run(testId, fileUri);
+  }
+}

libraries/transformer/src/androidTest/java/androidx/media3/transformer/mh/analysis/package-info.java

@@ -0,0 +1,19 @@
+/*
+ * 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.
+ */
+@NonNullApi
+package androidx.media3.transformer.mh.analysis;
+
+import androidx.media3.common.util.NonNullApi;