1 files changed, 77 insertions, 0 deletions
diff --git a/mobile/android/exoplayer2/src/main/java/org/mozilla/thirdparty/com/google/android/exoplayer2/upstream/TransferListener.java b/mobile/android/exoplayer2/src/main/java/org/mozilla/thirdparty/com/google/android/exoplayer2/upstream/TransferListener.java
new file mode 100644
index 0000000000..f6574120ff
--- /dev/null
+++ b/mobile/android/exoplayer2/src/main/java/org/mozilla/thirdparty/com/google/android/exoplayer2/upstream/TransferListener.java
@@ -0,0 +1,77 @@
+/*
+ * 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;
+
+/**
+ * A listener of data transfer events.
+ *
+ * <p>A transfer usually progresses through multiple steps:
+ *
+ * <ol>
+ *   <li>Initializing the underlying resource (e.g. opening a HTTP connection). {@link
+ *       #onTransferInitializing(DataSource, DataSpec, boolean)} is called before the initialization
+ *       starts.
+ *   <li>Starting the transfer after successfully initializing the resource. {@link
+ *       #onTransferStart(DataSource, DataSpec, boolean)} is called. Note that this only happens if
+ *       the initialization was successful.
+ *   <li>Transferring data. {@link #onBytesTransferred(DataSource, DataSpec, boolean, int)} is
+ *       called frequently during the transfer to indicate progress.
+ *   <li>Closing the transfer and the underlying resource. {@link #onTransferEnd(DataSource,
+ *       DataSpec, boolean)} is called. Note that each {@link #onTransferStart(DataSource, DataSpec,
+ *       boolean)} will have exactly one corresponding call to {@link #onTransferEnd(DataSource,
+ *       DataSpec, boolean)}.
+ * </ol>
+ */
+public interface TransferListener {
+
+  /**
+   * Called when a transfer is being initialized.
+   *
+   * @param source The source performing the transfer.
+   * @param dataSpec Describes the data for which the transfer is initialized.
+   * @param isNetwork Whether the data is transferred through a network.
+   */
+  void onTransferInitializing(DataSource source, DataSpec dataSpec, boolean isNetwork);
+
+  /**
+   * Called when a transfer starts.
+   *
+   * @param source The source performing the transfer.
+   * @param dataSpec Describes the data being transferred.
+   * @param isNetwork Whether the data is transferred through a network.
+   */
+  void onTransferStart(DataSource source, DataSpec dataSpec, boolean isNetwork);
+
+  /**
+   * Called incrementally during a transfer.
+   *
+   * @param source The source performing the transfer.
+   * @param dataSpec Describes the data being transferred.
+   * @param isNetwork Whether the data is transferred through a network.
+   * @param bytesTransferred The number of bytes transferred since the previous call to this method
+   */
+  void onBytesTransferred(
+      DataSource source, DataSpec dataSpec, boolean isNetwork, int bytesTransferred);
+
+  /**
+   * Called when a transfer ends.
+   *
+   * @param source The source performing the transfer.
+   * @param dataSpec Describes the data being transferred.
+   * @param isNetwork Whether the data is transferred through a network.
+   */
+  void onTransferEnd(DataSource source, DataSpec dataSpec, boolean isNetwork);
+}