The audio and video cannot both be removed because the output would not contain any + * samples. + */ + @CanIgnoreReturnValue + Factory setRemoveAudio(boolean removeAudio); + + /** + * Sets whether to remove the video samples from the output (if any). + * + *
The audio and video cannot both be removed because the output would not contain any + * samples. + */ + @CanIgnoreReturnValue + Factory setRemoveVideo(boolean removeVideo); + + /** + * Sets whether the video samples should be flattened prior to decoding for media containing + * slow motion markers. + * + *
The audio samples are flattened after they are output by the {@link AssetLoader}, because + * this is done on decoded samples. + * + *
For more information on slow motion flattening, see {@link + * TransformationRequest.Builder#setFlattenForSlowMotion(boolean)}. + */ + @CanIgnoreReturnValue + Factory setFlattenVideoForSlowMotion(boolean flattenVideoForSlowMotion); + + /** Sets the {@link MediaSource.Factory} to be used to retrieve the samples. */ + @CanIgnoreReturnValue + Factory setMediaSourceFactory(MediaSource.Factory mediaSourceFactory); + + /** Sets the {@link Codec.DecoderFactory} to be used to decode the samples (if necessary). */ + @CanIgnoreReturnValue + Factory setDecoderFactory(Codec.DecoderFactory decoderFactory); + + /** + * Sets the {@link Looper} that's used to access the {@link AssetLoader} after it's been + * created. + */ + @CanIgnoreReturnValue + Factory setLooper(Looper looper); + + /** Sets the {@link Listener} on which the {@link AssetLoader} should notify of events. */ + @CanIgnoreReturnValue + Factory setListener(AssetLoader.Listener listener); + + /** + * The {@link Clock} to use. + * + *
Should always be {@link Clock#DEFAULT} except for testing.
+ */
+ @CanIgnoreReturnValue
+ Factory setClock(Clock clock);
+
+ /**
+ * Creates an {@link AssetLoader} instance. All the setters in this factory must be called
+ * before creating the {@link AssetLoader}.
+ */
+ AssetLoader createAssetLoader();
+ }
+
/**
* A listener of asset loader events.
*
diff --git a/library/transformer/src/main/java/com/google/android/exoplayer2/transformer/DefaultAssetLoaderFactory.java b/library/transformer/src/main/java/com/google/android/exoplayer2/transformer/DefaultAssetLoaderFactory.java
new file mode 100644
index 0000000000..f0f0287796
--- /dev/null
+++ b/library/transformer/src/main/java/com/google/android/exoplayer2/transformer/DefaultAssetLoaderFactory.java
@@ -0,0 +1,127 @@
+/*
+ * 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.android.exoplayer2.util.Assertions.checkStateNotNull;
+
+import android.content.Context;
+import android.os.Looper;
+import androidx.annotation.Nullable;
+import com.google.android.exoplayer2.MediaItem;
+import com.google.android.exoplayer2.source.MediaSource;
+import com.google.android.exoplayer2.util.Clock;
+import com.google.errorprone.annotations.CanIgnoreReturnValue;
+
+/** The default {@link AssetLoader.Factory} implementation. */
+public final class DefaultAssetLoaderFactory implements AssetLoader.Factory {
+
+ @Nullable private Context context;
+ @Nullable private MediaItem mediaItem;
+ private boolean removeAudio;
+ private boolean removeVideo;
+ private boolean flattenVideoForSlowMotion;
+ @Nullable private MediaSource.Factory mediaSourceFactory;
+ @Nullable private Codec.DecoderFactory decoderFactory;
+ @Nullable private Looper looper;
+ @Nullable private AssetLoader.Listener listener;
+ @Nullable private Clock clock;
+
+ @Override
+ @CanIgnoreReturnValue
+ public AssetLoader.Factory setContext(Context context) {
+ this.context = context;
+ return this;
+ }
+
+ @Override
+ @CanIgnoreReturnValue
+ public AssetLoader.Factory setMediaItem(MediaItem mediaItem) {
+ this.mediaItem = mediaItem;
+ return this;
+ }
+
+ @Override
+ @CanIgnoreReturnValue
+ public AssetLoader.Factory setRemoveAudio(boolean removeAudio) {
+ this.removeAudio = removeAudio;
+ return this;
+ }
+
+ @Override
+ @CanIgnoreReturnValue
+ public AssetLoader.Factory setRemoveVideo(boolean removeVideo) {
+ this.removeVideo = removeVideo;
+ return this;
+ }
+
+ @Override
+ @CanIgnoreReturnValue
+ public AssetLoader.Factory setFlattenVideoForSlowMotion(boolean flattenVideoForSlowMotion) {
+ this.flattenVideoForSlowMotion = flattenVideoForSlowMotion;
+ return this;
+ }
+
+ @Override
+ @CanIgnoreReturnValue
+ public AssetLoader.Factory setMediaSourceFactory(MediaSource.Factory mediaSourceFactory) {
+ this.mediaSourceFactory = mediaSourceFactory;
+ return this;
+ }
+
+ @Override
+ @CanIgnoreReturnValue
+ public AssetLoader.Factory setDecoderFactory(Codec.DecoderFactory decoderFactory) {
+ this.decoderFactory = decoderFactory;
+ return this;
+ }
+
+ @Override
+ @CanIgnoreReturnValue
+ public AssetLoader.Factory setLooper(Looper looper) {
+ this.looper = looper;
+ return this;
+ }
+
+ @Override
+ @CanIgnoreReturnValue
+ public AssetLoader.Factory setListener(AssetLoader.Listener listener) {
+ this.listener = listener;
+ return this;
+ }
+
+ @Override
+ @CanIgnoreReturnValue
+ public AssetLoader.Factory setClock(Clock clock) {
+ this.clock = clock;
+ return this;
+ }
+
+ @Override
+ public AssetLoader createAssetLoader() {
+ return new ExoPlayerAssetLoader(
+ checkStateNotNull(context),
+ checkStateNotNull(mediaItem),
+ removeAudio,
+ removeVideo,
+ flattenVideoForSlowMotion,
+ checkStateNotNull(mediaSourceFactory),
+ checkStateNotNull(decoderFactory),
+ checkStateNotNull(looper),
+ checkStateNotNull(listener),
+ checkStateNotNull(clock));
+ }
+}
diff --git a/library/transformer/src/main/java/com/google/android/exoplayer2/transformer/Transformer.java b/library/transformer/src/main/java/com/google/android/exoplayer2/transformer/Transformer.java
index a84c23c29b..99ba44e82a 100644
--- a/library/transformer/src/main/java/com/google/android/exoplayer2/transformer/Transformer.java
+++ b/library/transformer/src/main/java/com/google/android/exoplayer2/transformer/Transformer.java
@@ -90,6 +90,7 @@ public final class Transformer {
private boolean forceSilentAudio;
private ListenerSet The default value is a {@link DefaultAssetLoaderFactory}.
+ *
+ * @param assetLoaderFactory An {@link AssetLoader.Factory}.
+ * @return This builder.
+ */
+ @CanIgnoreReturnValue
+ public Builder setAssetLoaderFactory(AssetLoader.Factory assetLoaderFactory) {
+ this.assetLoaderFactory = assetLoaderFactory;
+ return this;
+ }
+
/**
* Sets the {@link Codec.DecoderFactory} that will be used by the transformer.
*
@@ -476,6 +493,7 @@ public final class Transformer {
forceSilentAudio,
listeners,
mediaSourceFactory,
+ assetLoaderFactory,
decoderFactory,
encoderFactory,
frameProcessorFactory,
@@ -589,6 +607,7 @@ public final class Transformer {
private final boolean forceSilentAudio;
private final ListenerSet