Add simpler HttpDataSource constructors

PiperOrigin-RevId: 248350557

extensions/cronet/src/main/java/com/google/android/exoplayer2/ext/cronet/CronetDataSource.java

@@ -113,7 +113,7 @@ public class CronetDataSource extends BaseDataSource implements HttpDataSource {
 
   private final CronetEngine cronetEngine;
   private final Executor executor;
-  private final Predicate<String> contentTypePredicate;
+  @Nullable private final Predicate<String> contentTypePredicate;
   private final int connectTimeoutMs;
   private final int readTimeoutMs;
   private final boolean resetTimeoutOnRedirects;
@@ -146,6 +146,18 @@ public class CronetDataSource extends BaseDataSource implements HttpDataSource {
 
   private volatile long currentConnectTimeoutMs;
 
+  /**
+   * @param cronetEngine A CronetEngine.
+   * @param executor The {@link java.util.concurrent.Executor} that will handle responses. This may
+   *     be a direct executor (i.e. executes tasks on the calling thread) in order to avoid a thread
+   *     hop from Cronet's internal network thread to the response handling thread. However, to
+   *     avoid slowing down overall network performance, care must be taken to make sure response
+   *     handling is a fast operation when using a direct executor.
+   */
+  public CronetDataSource(CronetEngine cronetEngine, Executor executor) {
+    this(cronetEngine, executor, /* contentTypePredicate= */ null);
+  }
+
   /**
    * @param cronetEngine A CronetEngine.
    * @param executor The {@link java.util.concurrent.Executor} that will handle responses. This may
@@ -158,7 +170,9 @@ public class CronetDataSource extends BaseDataSource implements HttpDataSource {
    *     #open(DataSpec)}.
    */
   public CronetDataSource(
-      CronetEngine cronetEngine, Executor executor, Predicate<String> contentTypePredicate) {
+      CronetEngine cronetEngine,
+      Executor executor,
+      @Nullable Predicate<String> contentTypePredicate) {
     this(
         cronetEngine,
         executor,
@@ -188,7 +202,7 @@ public class CronetDataSource extends BaseDataSource implements HttpDataSource {
   public CronetDataSource(
       CronetEngine cronetEngine,
       Executor executor,
-      Predicate<String> contentTypePredicate,
+      @Nullable Predicate<String> contentTypePredicate,
       int connectTimeoutMs,
       int readTimeoutMs,
       boolean resetTimeoutOnRedirects,
@@ -225,7 +239,7 @@ public class CronetDataSource extends BaseDataSource implements HttpDataSource {
   public CronetDataSource(
       CronetEngine cronetEngine,
       Executor executor,
-      Predicate<String> contentTypePredicate,
+      @Nullable Predicate<String> contentTypePredicate,
       int connectTimeoutMs,
       int readTimeoutMs,
       boolean resetTimeoutOnRedirects,
@@ -246,7 +260,7 @@ public class CronetDataSource extends BaseDataSource implements HttpDataSource {
   /* package */ CronetDataSource(
       CronetEngine cronetEngine,
       Executor executor,
-      Predicate<String> contentTypePredicate,
+      @Nullable Predicate<String> contentTypePredicate,
       int connectTimeoutMs,
       int readTimeoutMs,
       boolean resetTimeoutOnRedirects,

extensions/okhttp/src/main/java/com/google/android/exoplayer2/ext/okhttp/OkHttpDataSource.java

@@ -73,6 +73,15 @@ public class OkHttpDataSource extends BaseDataSource implements HttpDataSource {
   private long bytesSkipped;
   private long bytesRead;
 
+  /**
+   * @param callFactory A {@link Call.Factory} (typically an {@link okhttp3.OkHttpClient}) for use
+   *     by the source.
+   * @param userAgent An optional User-Agent string.
+   */
+  public OkHttpDataSource(Call.Factory callFactory, @Nullable String userAgent) {
+    this(callFactory, userAgent, /* contentTypePredicate= */ null);
+  }
+
   /**
    * @param callFactory A {@link Call.Factory} (typically an {@link okhttp3.OkHttpClient}) for use
    *     by the source.

library/core/src/main/java/com/google/android/exoplayer2/upstream/DefaultHttpDataSource.java

@@ -89,6 +89,11 @@ public class DefaultHttpDataSource extends BaseDataSource implements HttpDataSou
   private long bytesSkipped;
   private long bytesRead;
 
+  /** @param userAgent The User-Agent string that should be used. */
+  public DefaultHttpDataSource(String userAgent) {
+    this(userAgent, /* contentTypePredicate= */ null);
+  }
+
   /**
    * @param userAgent The User-Agent string that should be used.
    * @param contentTypePredicate An optional {@link Predicate}. If a content type is rejected by the

testutils_robolectric/src/main/java/com/google/android/exoplayer2/testutil/FakeMediaChunk.java

@@ -27,7 +27,7 @@ import java.io.IOException;
 /** Fake {@link MediaChunk}. */
 public final class FakeMediaChunk extends MediaChunk {
 
-  private static final DataSource DATA_SOURCE = new DefaultHttpDataSource("TEST_AGENT", null);
+  private static final DataSource DATA_SOURCE = new DefaultHttpDataSource("TEST_AGENT");
 
   public FakeMediaChunk(Format trackFormat, long startTimeUs, long endTimeUs) {
     this(new DataSpec(Uri.EMPTY), trackFormat, startTimeUs, endTimeUs);