1 files changed, 171 insertions, 0 deletions
diff --git a/mobile/android/exoplayer2/src/main/java/org/mozilla/thirdparty/com/google/android/exoplayer2/upstream/FileDataSource.java b/mobile/android/exoplayer2/src/main/java/org/mozilla/thirdparty/com/google/android/exoplayer2/upstream/FileDataSource.java
new file mode 100644
index 0000000000..eee30e668f
--- /dev/null
+++ b/mobile/android/exoplayer2/src/main/java/org/mozilla/thirdparty/com/google/android/exoplayer2/upstream/FileDataSource.java
@@ -0,0 +1,171 @@
+/*
+ * 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 static org.mozilla.thirdparty.com.google.android.exoplayer2.util.Util.castNonNull;
+
+import android.net.Uri;
+import android.text.TextUtils;
+import androidx.annotation.Nullable;
+import org.mozilla.thirdparty.com.google.android.exoplayer2.C;
+import org.mozilla.thirdparty.com.google.android.exoplayer2.util.Assertions;
+import java.io.EOFException;
+import java.io.FileNotFoundException;
+import java.io.IOException;
+import java.io.RandomAccessFile;
+
+/** A {@link DataSource} for reading local files. */
+public final class FileDataSource extends BaseDataSource {
+
+  /** Thrown when a {@link FileDataSource} encounters an error reading a file. */
+  public static class FileDataSourceException extends IOException {
+
+    public FileDataSourceException(IOException cause) {
+      super(cause);
+    }
+
+    public FileDataSourceException(String message, IOException cause) {
+      super(message, cause);
+    }
+  }
+
+  /** {@link DataSource.Factory} for {@link FileDataSource} instances. */
+  public static final class Factory implements DataSource.Factory {
+
+    @Nullable private TransferListener listener;
+
+    /**
+     * Sets a {@link TransferListener} for {@link FileDataSource} instances created by this factory.
+     *
+     * @param listener The {@link TransferListener}.
+     * @return This factory.
+     */
+    public Factory setListener(@Nullable TransferListener listener) {
+      this.listener = listener;
+      return this;
+    }
+
+    @Override
+    public FileDataSource createDataSource() {
+      FileDataSource dataSource = new FileDataSource();
+      if (listener != null) {
+        dataSource.addTransferListener(listener);
+      }
+      return dataSource;
+    }
+  }
+
+  @Nullable private RandomAccessFile file;
+  @Nullable private Uri uri;
+  private long bytesRemaining;
+  private boolean opened;
+
+  public FileDataSource() {
+    super(/* isNetwork= */ false);
+  }
+
+  @Override
+  public long open(DataSpec dataSpec) throws FileDataSourceException {
+    try {
+      Uri uri = dataSpec.uri;
+      this.uri = uri;
+
+      transferInitializing(dataSpec);
+
+      this.file = openLocalFile(uri);
+
+      file.seek(dataSpec.position);
+      bytesRemaining = dataSpec.length == C.LENGTH_UNSET ? file.length() - dataSpec.position
+          : dataSpec.length;
+      if (bytesRemaining < 0) {
+        throw new EOFException();
+      }
+    } catch (IOException e) {
+      throw new FileDataSourceException(e);
+    }
+
+    opened = true;
+    transferStarted(dataSpec);
+
+    return bytesRemaining;
+  }
+
+  private static RandomAccessFile openLocalFile(Uri uri) throws FileDataSourceException {
+    try {
+      return new RandomAccessFile(Assertions.checkNotNull(uri.getPath()), "r");
+    } catch (FileNotFoundException e) {
+      if (!TextUtils.isEmpty(uri.getQuery()) || !TextUtils.isEmpty(uri.getFragment())) {
+        throw new FileDataSourceException(
+            String.format(
+                "uri has query and/or fragment, which are not supported. Did you call Uri.parse()"
+                    + " on a string containing '?' or '#'? Use Uri.fromFile(new File(path)) to"
+                    + " avoid this. path=%s,query=%s,fragment=%s",
+                uri.getPath(), uri.getQuery(), uri.getFragment()),
+            e);
+      }
+      throw new FileDataSourceException(e);
+    }
+  }
+
+  @Override
+  public int read(byte[] buffer, int offset, int readLength) throws FileDataSourceException {
+    if (readLength == 0) {
+      return 0;
+    } else if (bytesRemaining == 0) {
+      return C.RESULT_END_OF_INPUT;
+    } else {
+      int bytesRead;
+      try {
+        bytesRead =
+            castNonNull(file).read(buffer, offset, (int) Math.min(bytesRemaining, readLength));
+      } catch (IOException e) {
+        throw new FileDataSourceException(e);
+      }
+
+      if (bytesRead > 0) {
+        bytesRemaining -= bytesRead;
+        bytesTransferred(bytesRead);
+      }
+
+      return bytesRead;
+    }
+  }
+
+  @Override
+  @Nullable
+  public Uri getUri() {
+    return uri;
+  }
+
+  @Override
+  public void close() throws FileDataSourceException {
+    uri = null;
+    try {
+      if (file != null) {
+        file.close();
+      }
+    } catch (IOException e) {
+      throw new FileDataSourceException(e);
+    } finally {
+      file = null;
+      if (opened) {
+        opened = false;
+        transferEnded();
+      }
+    }
+  }
+
+}