1 files changed, 110 insertions, 0 deletions
diff --git a/mobile/android/exoplayer2/src/main/java/org/mozilla/thirdparty/com/google/android/exoplayer2/upstream/DataSchemeDataSource.java b/mobile/android/exoplayer2/src/main/java/org/mozilla/thirdparty/com/google/android/exoplayer2/upstream/DataSchemeDataSource.java
new file mode 100644
index 0000000000..57420250ac
--- /dev/null
+++ b/mobile/android/exoplayer2/src/main/java/org/mozilla/thirdparty/com/google/android/exoplayer2/upstream/DataSchemeDataSource.java
@@ -0,0 +1,110 @@
+/*
+ * Copyright (C) 2017 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.util.Base64;
+import androidx.annotation.Nullable;
+import org.mozilla.thirdparty.com.google.android.exoplayer2.C;
+import org.mozilla.thirdparty.com.google.android.exoplayer2.ParserException;
+import org.mozilla.thirdparty.com.google.android.exoplayer2.util.Util;
+import java.io.IOException;
+import java.net.URLDecoder;
+
+/** A {@link DataSource} for reading data URLs, as defined by RFC 2397. */
+public final class DataSchemeDataSource extends BaseDataSource {
+
+  public static final String SCHEME_DATA = "data";
+
+  @Nullable private DataSpec dataSpec;
+  @Nullable private byte[] data;
+  private int endPosition;
+  private int readPosition;
+
+  // the constructor does not initialize fields: data
+  @SuppressWarnings("nullness:initialization.fields.uninitialized")
+  public DataSchemeDataSource() {
+    super(/* isNetwork= */ false);
+  }
+
+  @Override
+  public long open(DataSpec dataSpec) throws IOException {
+    transferInitializing(dataSpec);
+    this.dataSpec = dataSpec;
+    readPosition = (int) dataSpec.position;
+    Uri uri = dataSpec.uri;
+    String scheme = uri.getScheme();
+    if (!SCHEME_DATA.equals(scheme)) {
+      throw new ParserException("Unsupported scheme: " + scheme);
+    }
+    String[] uriParts = Util.split(uri.getSchemeSpecificPart(), ",");
+    if (uriParts.length != 2) {
+      throw new ParserException("Unexpected URI format: " + uri);
+    }
+    String dataString = uriParts[1];
+    if (uriParts[0].contains(";base64")) {
+      try {
+        data = Base64.decode(dataString, 0);
+      } catch (IllegalArgumentException e) {
+        throw new ParserException("Error while parsing Base64 encoded string: " + dataString, e);
+      }
+    } else {
+      // TODO: Add support for other charsets.
+      data = Util.getUtf8Bytes(URLDecoder.decode(dataString, C.ASCII_NAME));
+    }
+    endPosition =
+        dataSpec.length != C.LENGTH_UNSET ? (int) dataSpec.length + readPosition : data.length;
+    if (endPosition > data.length || readPosition > endPosition) {
+      data = null;
+      throw new DataSourceException(DataSourceException.POSITION_OUT_OF_RANGE);
+    }
+    transferStarted(dataSpec);
+    return (long) endPosition - readPosition;
+  }
+
+  @Override
+  public int read(byte[] buffer, int offset, int readLength) {
+    if (readLength == 0) {
+      return 0;
+    }
+    int remainingBytes = endPosition - readPosition;
+    if (remainingBytes == 0) {
+      return C.RESULT_END_OF_INPUT;
+    }
+    readLength = Math.min(readLength, remainingBytes);
+    System.arraycopy(castNonNull(data), readPosition, buffer, offset, readLength);
+    readPosition += readLength;
+    bytesTransferred(readLength);
+    return readLength;
+  }
+
+  @Override
+  @Nullable
+  public Uri getUri() {
+    return dataSpec != null ? dataSpec.uri : null;
+  }
+
+  @Override
+  public void close() {
+    if (data != null) {
+      data = null;
+      transferEnded();
+    }
+    dataSpec = null;
+  }
+}