1 files changed, 111 insertions, 0 deletions
diff --git a/mobile/android/exoplayer2/src/main/java/org/mozilla/thirdparty/com/google/android/exoplayer2/upstream/DataSource.java b/mobile/android/exoplayer2/src/main/java/org/mozilla/thirdparty/com/google/android/exoplayer2/upstream/DataSource.java
new file mode 100644
index 0000000000..26529253f8
--- /dev/null
+++ b/mobile/android/exoplayer2/src/main/java/org/mozilla/thirdparty/com/google/android/exoplayer2/upstream/DataSource.java
@@ -0,0 +1,111 @@
+/*
+ * Copyright (C) 2016 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 org.mozilla.thirdparty.com.google.android.exoplayer2.upstream;
+
+import android.net.Uri;
+import androidx.annotation.Nullable;
+import org.mozilla.thirdparty.com.google.android.exoplayer2.C;
+import java.io.IOException;
+import java.util.Collections;
+import java.util.List;
+import java.util.Map;
+
+/**
+ * A component from which streams of data can be read.
+ */
+public interface DataSource {
+
+  /**
+   * A factory for {@link DataSource} instances.
+   */
+  interface Factory {
+
+    /**
+     * Creates a {@link DataSource} instance.
+     */
+    DataSource createDataSource();
+  }
+
+  /**
+   * Adds a {@link TransferListener} to listen to data transfers. This method is not thread-safe.
+   *
+   * @param transferListener A {@link TransferListener}.
+   */
+  void addTransferListener(TransferListener transferListener);
+
+  /**
+   * Opens the source to read the specified data.
+   * <p>
+   * Note: If an {@link IOException} is thrown, callers must still call {@link #close()} to ensure
+   * that any partial effects of the invocation are cleaned up.
+   *
+   * @param dataSpec Defines the data to be read.
+   * @throws IOException If an error occurs opening the source. {@link DataSourceException} can be
+   *     thrown or used as a cause of the thrown exception to specify the reason of the error.
+   * @return The number of bytes that can be read from the opened source. For unbounded requests
+   *     (i.e. requests where {@link DataSpec#length} equals {@link C#LENGTH_UNSET}) this value
+   *     is the resolved length of the request, or {@link C#LENGTH_UNSET} if the length is still
+   *     unresolved. For all other requests, the value returned will be equal to the request's
+   *     {@link DataSpec#length}.
+   */
+  long open(DataSpec dataSpec) throws IOException;
+
+  /**
+   * Reads up to {@code readLength} bytes of data and stores them into {@code buffer}, starting at
+   * index {@code offset}.
+   *
+   * <p>If {@code readLength} is zero then 0 is returned. Otherwise, if no data is available because
+   * the end of the opened range has been reached, then {@link C#RESULT_END_OF_INPUT} is returned.
+   * Otherwise, the call will block until at least one byte of data has been read and the number of
+   * bytes read is returned.
+   *
+   * @param buffer The buffer into which the read data should be stored.
+   * @param offset The start offset into {@code buffer} at which data should be written.
+   * @param readLength The maximum number of bytes to read.
+   * @return The number of bytes read, or {@link C#RESULT_END_OF_INPUT} if no data is available
+   *     because the end of the opened range has been reached.
+   * @throws IOException If an error occurs reading from the source.
+   */
+  int read(byte[] buffer, int offset, int readLength) throws IOException;
+
+  /**
+   * When the source is open, returns the {@link Uri} from which data is being read. The returned
+   * {@link Uri} will be identical to the one passed {@link #open(DataSpec)} in the {@link DataSpec}
+   * unless redirection has occurred. If redirection has occurred, the {@link Uri} after redirection
+   * is returned.
+   *
+   * @return The {@link Uri} from which data is being read, or null if the source is not open.
+   */
+  @Nullable Uri getUri();
+
+  /**
+   * When the source is open, returns the response headers associated with the last {@link #open}
+   * call. Otherwise, returns an empty map.
+   */
+  default Map<String, List<String>> getResponseHeaders() {
+    return Collections.emptyMap();
+  }
+
+  /**
+   * Closes the source.
+   * <p>
+   * Note: This method must be called even if the corresponding call to {@link #open(DataSpec)}
+   * threw an {@link IOException}. See {@link #open(DataSpec)} for more details.
+   *
+   * @throws IOException If an error occurs closing the source.
+   */
+  void close() throws IOException;
+}