Add CompositionPlayer to the Transformer demo app

PiperOrigin-RevId: 571284291

demos/transformer/build.gradle

@@ -77,6 +77,7 @@ dependencies {
     implementation 'androidx.annotation:annotation:' + androidxAnnotationVersion
     implementation 'androidx.appcompat:appcompat:' + androidxAppCompatVersion
     implementation 'androidx.constraintlayout:constraintlayout:' + androidxConstraintLayoutVersion
+    implementation 'androidx.recyclerview:recyclerview:' + androidxRecyclerViewVersion
     implementation 'androidx.multidex:multidex:' + androidxMultidexVersion
     implementation 'com.google.android.material:material:' + androidxMaterialVersion
     implementation project(modulePrefix + 'lib-effect')

demos/transformer/src/main/AndroidManifest.xml

@@ -64,5 +64,11 @@
         android:label="@string/app_name"
         android:exported="true"
         android:theme="@style/Theme.MaterialComponents.DayNight.NoActionBar"/>
+    <activity android:name=".CompositionPreviewActivity"
+      android:configChanges="keyboard|keyboardHidden|orientation|screenSize|screenLayout|smallestScreenSize|uiMode"
+      android:launchMode="singleTop"
+      android:label="@string/app_name"
+      android:exported="true"
+      android:theme="@style/Theme.MaterialComponents.DayNight.NoActionBar"/>
   </application>
 </manifest>

demos/transformer/src/main/java/androidx/media3/demo/transformer/AssetItemAdapter.java

@@ -0,0 +1,70 @@
+/*
+ * Copyright 2023 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.demo.transformer;
+
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.TextView;
+import androidx.recyclerview.widget.RecyclerView;
+import java.util.ArrayList;
+import java.util.List;
+
+/** A {@link RecyclerView.Adapter} that displays assets in a sequence in a {@link RecyclerView}. */
+public final class AssetItemAdapter extends RecyclerView.Adapter<AssetItemAdapter.ViewHolder> {
+  private static final String TAG = "AssetItemAdapter";
+
+  private final List<String> dataSet;
+
+  /**
+   * Creates a new instance
+   *
+   * @param data A list of items to populate RecyclerView with.
+   */
+  public AssetItemAdapter(List<String> data) {
+    this.dataSet = new ArrayList<>(data);
+  }
+
+  @Override
+  public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
+    View v = LayoutInflater.from(parent.getContext()).inflate(R.layout.preset_item, parent, false);
+    return new ViewHolder(v);
+  }
+
+  @Override
+  public void onBindViewHolder(ViewHolder holder, int position) {
+    holder.getTextView().setText(dataSet.get(position));
+  }
+
+  @Override
+  public int getItemCount() {
+    return dataSet.size();
+  }
+
+  /** A {@link RecyclerView.ViewHolder} used to build {@link AssetItemAdapter}. */
+  public static final class ViewHolder extends RecyclerView.ViewHolder {
+    private final TextView textView;
+
+    private ViewHolder(View view) {
+      super(view);
+      textView = view.findViewById(R.id.preset_name_text);
+    }
+
+    private TextView getTextView() {
+      return textView;
+    }
+  }
+}

demos/transformer/src/main/java/androidx/media3/demo/transformer/CompositionPreviewActivity.java

@@ -0,0 +1,126 @@
+/*
+ * Copyright 2023 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.demo.transformer;
+
+import static androidx.media3.common.util.Assertions.checkStateNotNull;
+
+import android.app.Activity;
+import android.os.Bundle;
+import android.view.View;
+import androidx.annotation.Nullable;
+import androidx.appcompat.app.AppCompatActivity;
+import androidx.appcompat.widget.AppCompatButton;
+import androidx.media3.common.MediaItem;
+import androidx.media3.transformer.Composition;
+import androidx.media3.transformer.CompositionPlayer;
+import androidx.media3.transformer.EditedMediaItem;
+import androidx.media3.transformer.EditedMediaItemSequence;
+import androidx.media3.ui.PlayerView;
+import androidx.recyclerview.widget.LinearLayoutManager;
+import androidx.recyclerview.widget.RecyclerView;
+import com.google.common.collect.ImmutableList;
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.List;
+import org.checkerframework.checker.nullness.qual.MonotonicNonNull;
+
+/**
+ * An {@link Activity} that previews compositions, using {@link
+ * androidx.media3.transformer.CompositionPlayer}.
+ */
+public final class CompositionPreviewActivity extends AppCompatActivity {
+  private static final String TAG = "CompPreviewActivity";
+  private static final ImmutableList<Integer> SEQUENCE_FILE_INDICES = ImmutableList.of(0, 2);
+
+  private @MonotonicNonNull PlayerView playerView;
+  private @MonotonicNonNull RecyclerView presetList;
+  private @MonotonicNonNull AppCompatButton previewButton;
+
+  @Nullable private CompositionPlayer compositionPlayer;
+
+  @Override
+  protected void onCreate(@Nullable Bundle savedInstanceState) {
+    super.onCreate(savedInstanceState);
+    setContentView(R.layout.composition_preview_activity);
+
+    String[] presetFileURIs = getResources().getStringArray(R.array.preset_uris);
+    String[] presetFileDescriptions = getResources().getStringArray(R.array.preset_descriptions);
+
+    playerView = findViewById(R.id.composition_player_view);
+    presetList = findViewById(R.id.composition_preset_list);
+    previewButton = findViewById(R.id.preview_button);
+    previewButton.setOnClickListener(view -> previewComposition(view, presetFileURIs));
+
+    LinearLayoutManager layoutManager =
+        new LinearLayoutManager(this, LinearLayoutManager.VERTICAL, /* reverseLayout= */ false);
+    presetList.setLayoutManager(layoutManager);
+    ArrayList<String> sequenceFiles = new ArrayList<>();
+    for (int i = 0; i < SEQUENCE_FILE_INDICES.size(); i++) {
+      if (SEQUENCE_FILE_INDICES.get(i) < presetFileDescriptions.length) {
+        sequenceFiles.add(presetFileDescriptions[SEQUENCE_FILE_INDICES.get(i)]);
+      }
+    }
+    AssetItemAdapter adapter = new AssetItemAdapter(sequenceFiles);
+    presetList.setAdapter(adapter);
+  }
+
+  @Override
+  protected void onStart() {
+    super.onStart();
+    checkStateNotNull(playerView).onResume();
+  }
+
+  @Override
+  protected void onStop() {
+    super.onStop();
+    checkStateNotNull(playerView).onPause();
+    releasePlayer();
+  }
+
+  private Composition prepareComposition(String[] presetFileURIs) {
+    List<EditedMediaItem> mediaItems = new ArrayList<>();
+    for (int i = 0; i < SEQUENCE_FILE_INDICES.size(); i++) {
+      mediaItems.add(
+          new EditedMediaItem.Builder(
+                  MediaItem.fromUri(presetFileURIs[SEQUENCE_FILE_INDICES.get(i)]))
+              .build());
+    }
+    EditedMediaItemSequence videoSequence =
+        new EditedMediaItemSequence(Collections.unmodifiableList(mediaItems));
+    return new Composition.Builder(ImmutableList.of(videoSequence)).build();
+  }
+
+  private void previewComposition(View view, String[] presetFileURIs) {
+    releasePlayer();
+    Composition composition = prepareComposition(presetFileURIs);
+    checkStateNotNull(playerView).setPlayer(null);
+
+    CompositionPlayer player = new CompositionPlayer(getApplicationContext(), /* looper= */ null);
+    this.compositionPlayer = player;
+    checkStateNotNull(playerView).setPlayer(compositionPlayer);
+    checkStateNotNull(playerView).setControllerAutoShow(false);
+    player.setComposition(composition);
+    player.prepare();
+    player.play();
+  }
+
+  private void releasePlayer() {
+    if (compositionPlayer != null) {
+      compositionPlayer.release();
+      compositionPlayer = null;
+    }
+  }
+}

demos/transformer/src/main/res/layout/composition_preview_activity.xml

@@ -0,0 +1,92 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright 2023 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.
+-->
+<androidx.constraintlayout.widget.ConstraintLayout
+  xmlns:android="http://schemas.android.com/apk/res/android"
+  xmlns:app="http://schemas.android.com/apk/res-auto"
+  android:layout_width="match_parent"
+  android:layout_height="match_parent"
+  android:padding="16dp">
+
+  <com.google.android.material.card.MaterialCardView
+    android:id="@+id/composition_preview_card_view"
+    android:layout_width="match_parent"
+    android:layout_height="0dp"
+    android:layout_weight="1"
+    app:layout_constraintEnd_toEndOf="parent"
+    app:layout_constraintStart_toStartOf="parent"
+    app:layout_constraintTop_toTopOf="parent"
+    app:cardCornerRadius="4dp"
+    app:cardElevation="2dp">
+
+    <LinearLayout
+      android:orientation="vertical"
+      android:layout_width="match_parent"
+      android:layout_height="wrap_content" >
+
+      <androidx.appcompat.widget.AppCompatTextView
+        android:id="@+id/input_text_view"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:layout_marginBottom="8dp"
+        android:padding="8dp"
+        android:textAppearance="@style/TextAppearance.AppCompat.Medium"
+        android:text="@string/preview_single_sequence" />
+
+      <FrameLayout
+        android:layout_width="match_parent"
+        android:layout_height="200dp" >
+
+        <androidx.media3.ui.PlayerView
+          android:id="@+id/composition_player_view"
+          android:layout_width="match_parent"
+          android:layout_height="wrap_content" />
+
+      </FrameLayout>
+
+    </LinearLayout>
+
+  </com.google.android.material.card.MaterialCardView>
+
+  <androidx.appcompat.widget.AppCompatTextView
+    android:id="@+id/sequence_header_text"
+    android:layout_width="match_parent"
+    android:layout_height="wrap_content"
+    android:layout_marginBottom="8dp"
+    android:padding="8dp"
+    android:text="@string/single_sequence_items"
+    app:layout_constraintEnd_toEndOf="parent"
+    app:layout_constraintStart_toStartOf="parent"
+    app:layout_constraintTop_toBottomOf="@id/composition_preview_card_view"/>
+
+  <androidx.recyclerview.widget.RecyclerView
+    android:id="@+id/composition_preset_list"
+    android:layout_width="match_parent"
+    android:layout_height="wrap_content"
+    android:layout_marginTop="16dp"
+    app:layout_constraintEnd_toEndOf="parent"
+    app:layout_constraintStart_toStartOf="parent"
+    app:layout_constraintTop_toBottomOf="@id/sequence_header_text"/>
+
+  <androidx.appcompat.widget.AppCompatButton
+    android:id="@+id/preview_button"
+    android:text="@string/preview"
+    android:layout_width="wrap_content"
+    android:layout_height="wrap_content"
+    app:layout_constraintEnd_toEndOf="parent"
+    app:layout_constraintStart_toStartOf="parent"
+    app:layout_constraintBottom_toBottomOf="parent"/>
+
+</androidx.constraintlayout.widget.ConstraintLayout>

demos/transformer/src/main/res/layout/preset_item.xml

@@ -0,0 +1,30 @@
+<?xml version="1.0" encoding="utf-8"?><!--
+  ~ Copyright 2023 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.
+  -->
+<androidx.appcompat.widget.LinearLayoutCompat
+  xmlns:android="http://schemas.android.com/apk/res/android"
+  android:layout_width="match_parent"
+  android:layout_height="wrap_content"
+  android:orientation="horizontal"
+  android:padding="16dp">
+
+  <androidx.appcompat.widget.AppCompatTextView
+    android:id="@+id/preset_name_text"
+    android:layout_width="0dp"
+    android:layout_height="wrap_content"
+    android:layout_gravity="center"
+    android:layout_weight="1"/>
+
+</androidx.appcompat.widget.LinearLayoutCompat>

demos/transformer/src/main/res/layout/transformer_activity.xml

@@ -1,4 +1,5 @@
-<?xml version="1.0" encoding="utf-8"?><!--
+<?xml version="1.0" encoding="utf-8"?>
+<!--
   ~ Copyright 2021 The Android Open Source Project
   ~
   ~ Licensed under the Apache License, Version 2.0 (the "License");

demos/transformer/src/main/res/values/arrays.xml

@@ -0,0 +1,56 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+  ~ Copyright 2023 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.
+  -->
+<resources>
+   <string-array name="preset_descriptions">
+      <item>720p H264 video and AAC audio</item>
+      <item>1080p H265 video and AAC audio</item>
+      <item>360p H264 video and AAC audio</item>
+      <item>360p VP8 video and Vorbis audio</item>
+      <item>4K H264 video and AAC audio (portrait, no B-frames)</item>
+      <item>8k H265 video and AAC audio</item>
+      <item>Short 1080p H265 video and AAC audio</item>
+      <item>Long 180p H264 video and AAC audio</item>
+      <item>H264 video and AAC audio (portrait, H &gt; W, 0°)</item>
+      <item>H264 video and AAC audio (portrait, H &lt; W, 90°)</item>
+      <item>London JPG image (Plays for 5secs at 30fps)</item>
+      <item>Tokyo JPG image (Portrait, Plays for 5secs at 30fps)</item>
+      <item>SEF slow motion with 240 fps</item>
+      <item>480p DASH (non-square pixels)</item>
+      <item>HDR (HDR10) H265 limited range video (encoding may fail)</item>
+      <item>HDR (HLG) H265 limited range video (encoding may fail)</item>
+      <item>720p H264 video with no audio</item>
+   </string-array>
+   <string-array name="preset_uris">
+      <item>https://storage.googleapis.com/exoplayer-test-media-1/mp4/android-screens-10s.mp4</item>
+      <item>https://storage.googleapis.com/exoplayer-test-media-0/android-block-1080-hevc.mp4</item>
+      <item>https://html5demos.com/assets/dizzy.mp4</item>
+      <item>https://html5demos.com/assets/dizzy.webm</item>
+      <item>https://storage.googleapis.com/exoplayer-test-media-1/mp4/portrait_4k60.mp4</item>
+      <item>https://storage.googleapis.com/exoplayer-test-media-1/mp4/8k24fps_4s.mp4</item>
+      <item>https://storage.googleapis.com/exoplayer-test-media-1/mp4/1920w_1080h_4s.mp4</item>
+      <item>https://storage.googleapis.com/exoplayer-test-media-0/BigBuckBunny_320x180.mp4</item>
+      <item>https://storage.googleapis.com/exoplayer-test-media-1/mp4/portrait_avc_aac.mp4</item>
+      <item>https://storage.googleapis.com/exoplayer-test-media-1/mp4/portrait_rotated_avc_aac.mp4</item>
+      <item>https://storage.googleapis.com/exoplayer-test-media-1/jpg/london.jpg</item>
+      <item>https://storage.googleapis.com/exoplayer-test-media-1/jpg/tokyo.jpg</item>
+      <item>https://storage.googleapis.com/exoplayer-test-media-1/mp4/slow-motion/slowMotion_stopwatch_240fps_long.mp4</item>
+      <item>https://storage.googleapis.com/exoplayer-test-media-1/gen/screens/dash-vod-single-segment/manifest-baseline.mpd</item>
+      <item>https://storage.googleapis.com/exoplayer-test-media-1/mp4/samsung-s21-hdr-hdr10.mp4</item>
+      <item>https://storage.googleapis.com/exoplayer-test-media-1/mp4/Pixel7Pro_HLG_1080P.mp4</item>
+      <item>https://storage.googleapis.com/exoplayer-test-media-1/mp4/sample_video_track_only.mp4</item>
+   </string-array>
+</resources>

demos/transformer/src/main/res/values/strings.xml

@@ -80,4 +80,7 @@
   <string name="overlay_text">Text</string>
   <string name="overlay_text_color">Text color</string>
   <string name="text_overlay_settings">Specify text overlay settings</string>
+  <string name="preview" translatable="false">Preview</string>
+  <string name="preview_single_sequence" translatable="false">Single sequence preview</string>
+  <string name="single_sequence_items" translatable="false">Single sequence items:</string>
 </resources>