Adding upstream version 1:115.7.0.upstream/1%115.7.0upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 109 insertions, 0 deletions

diff --git a/mobile/android/exoplayer2/src/main/java/org/mozilla/thirdparty/com/google/android/exoplayer2/extractor/ts/NalUnitTargetBuffer.java b/mobile/android/exoplayer2/src/main/java/org/mozilla/thirdparty/com/google/android/exoplayer2/extractor/ts/NalUnitTargetBuffer.java
new file mode 100644
index 0000000000..4941aa29a0
--- /dev/null
+++ b/mobile/android/exoplayer2/src/main/java/org/mozilla/thirdparty/com/google/android/exoplayer2/extractor/ts/NalUnitTargetBuffer.java
@@ -0,0 +1,109 @@
+/*
+ * 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.extractor.ts;
+
+import org.mozilla.thirdparty.com.google.android.exoplayer2.util.Assertions;
+import java.util.Arrays;
+
+/**
+ * A buffer that fills itself with data corresponding to a specific NAL unit, as it is
+ * encountered in the stream.
+ */
+/* package */ final class NalUnitTargetBuffer {
+
+  private final int targetType;
+
+  private boolean isFilling;
+  private boolean isCompleted;
+
+  public byte[] nalData;
+  public int nalLength;
+
+  public NalUnitTargetBuffer(int targetType, int initialCapacity) {
+    this.targetType = targetType;
+
+    // Initialize data with a start code in the first three bytes.
+    nalData = new byte[3 + initialCapacity];
+    nalData[2] = 1;
+  }
+
+  /**
+   * Resets the buffer, clearing any data that it holds.
+   */
+  public void reset() {
+    isFilling = false;
+    isCompleted = false;
+  }
+
+  /**
+   * Returns whether the buffer currently holds a complete NAL unit of the target type.
+   */
+  public boolean isCompleted() {
+    return isCompleted;
+  }
+
+  /**
+   * Called to indicate that a NAL unit has started.
+   *
+   * @param type The type of the NAL unit.
+   */
+  public void startNalUnit(int type) {
+    Assertions.checkState(!isFilling);
+    isFilling = type == targetType;
+    if (isFilling) {
+      // Skip the three byte start code when writing data.
+      nalLength = 3;
+      isCompleted = false;
+    }
+  }
+
+  /**
+   * Called to pass stream data. The data passed should not include the 3 byte start code.
+   *
+   * @param data Holds the data being passed.
+   * @param offset The offset of the data in {@code data}.
+   * @param limit The limit (exclusive) of the data in {@code data}.
+   */
+  public void appendToNalUnit(byte[] data, int offset, int limit) {
+    if (!isFilling) {
+      return;
+    }
+    int readLength = limit - offset;
+    if (nalData.length < nalLength + readLength) {
+      nalData = Arrays.copyOf(nalData, (nalLength + readLength) * 2);
+    }
+    System.arraycopy(data, offset, nalData, nalLength, readLength);
+    nalLength += readLength;
+  }
+
+  /**
+   * Called to indicate that a NAL unit has ended.
+   *
+   * @param discardPadding The number of excess bytes that were passed to
+   *     {@link #appendToNalUnit(byte[], int, int)}, which should be discarded.
+   * @return Whether the ended NAL unit is of the target type.
+   */
+  public boolean endNalUnit(int discardPadding) {
+    if (!isFilling) {
+      return false;
+    }
+    nalLength -= discardPadding;
+    isFilling = false;
+    isCompleted = true;
+    return true;
+  }
+
+}