1 files changed, 68 insertions, 0 deletions
diff --git a/mobile/android/exoplayer2/src/main/java/org/mozilla/thirdparty/com/google/android/exoplayer2/util/LibraryLoader.java b/mobile/android/exoplayer2/src/main/java/org/mozilla/thirdparty/com/google/android/exoplayer2/util/LibraryLoader.java
new file mode 100644
index 0000000000..31e582aac5
--- /dev/null
+++ b/mobile/android/exoplayer2/src/main/java/org/mozilla/thirdparty/com/google/android/exoplayer2/util/LibraryLoader.java
@@ -0,0 +1,68 @@
+/*
+ * 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.util;
+
+import java.util.Arrays;
+
+/**
+ * Configurable loader for native libraries.
+ */
+public final class LibraryLoader {
+
+  private static final String TAG = "LibraryLoader";
+
+  private String[] nativeLibraries;
+  private boolean loadAttempted;
+  private boolean isAvailable;
+
+  /**
+   * @param libraries The names of the libraries to load.
+   */
+  public LibraryLoader(String... libraries) {
+    nativeLibraries = libraries;
+  }
+
+  /**
+   * Overrides the names of the libraries to load. Must be called before any call to
+   * {@link #isAvailable()}.
+   */
+  public synchronized void setLibraries(String... libraries) {
+    Assertions.checkState(!loadAttempted, "Cannot set libraries after loading");
+    nativeLibraries = libraries;
+  }
+
+  /**
+   * Returns whether the underlying libraries are available, loading them if necessary.
+   */
+  public synchronized boolean isAvailable() {
+    if (loadAttempted) {
+      return isAvailable;
+    }
+    loadAttempted = true;
+    try {
+      for (String lib : nativeLibraries) {
+        System.loadLibrary(lib);
+      }
+      isAvailable = true;
+    } catch (UnsatisfiedLinkError exception) {
+      // Log a warning as an attempt to check for the library indicates that the app depends on an
+      // extension and generally would expect its native libraries to be available.
+      Log.w(TAG, "Failed to load " + Arrays.toString(nativeLibraries));
+    }
+    return isAvailable;
+  }
+
+}