1 files changed, 91 insertions, 0 deletions
diff --git a/mobile/android/exoplayer2/src/main/java/org/mozilla/thirdparty/com/google/android/exoplayer2/video/HevcConfig.java b/mobile/android/exoplayer2/src/main/java/org/mozilla/thirdparty/com/google/android/exoplayer2/video/HevcConfig.java
new file mode 100644
index 0000000000..844712146a
--- /dev/null
+++ b/mobile/android/exoplayer2/src/main/java/org/mozilla/thirdparty/com/google/android/exoplayer2/video/HevcConfig.java
@@ -0,0 +1,91 @@
+/*
+ * 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.video;
+
+import androidx.annotation.Nullable;
+import org.mozilla.thirdparty.com.google.android.exoplayer2.ParserException;
+import org.mozilla.thirdparty.com.google.android.exoplayer2.util.NalUnitUtil;
+import org.mozilla.thirdparty.com.google.android.exoplayer2.util.ParsableByteArray;
+import java.util.Collections;
+import java.util.List;
+
+/**
+ * HEVC configuration data.
+ */
+public final class HevcConfig {
+
+  @Nullable public final List<byte[]> initializationData;
+  public final int nalUnitLengthFieldLength;
+
+  /**
+   * Parses HEVC configuration data.
+   *
+   * @param data A {@link ParsableByteArray}, whose position is set to the start of the HEVC
+   *     configuration data to parse.
+   * @return A parsed representation of the HEVC configuration data.
+   * @throws ParserException If an error occurred parsing the data.
+   */
+  public static HevcConfig parse(ParsableByteArray data) throws ParserException {
+    try {
+      data.skipBytes(21); // Skip to the NAL unit length size field.
+      int lengthSizeMinusOne = data.readUnsignedByte() & 0x03;
+
+      // Calculate the combined size of all VPS/SPS/PPS bitstreams.
+      int numberOfArrays = data.readUnsignedByte();
+      int csdLength = 0;
+      int csdStartPosition = data.getPosition();
+      for (int i = 0; i < numberOfArrays; i++) {
+        data.skipBytes(1); // completeness (1), nal_unit_type (7)
+        int numberOfNalUnits = data.readUnsignedShort();
+        for (int j = 0; j < numberOfNalUnits; j++) {
+          int nalUnitLength = data.readUnsignedShort();
+          csdLength += 4 + nalUnitLength; // Start code and NAL unit.
+          data.skipBytes(nalUnitLength);
+        }
+      }
+
+      // Concatenate the codec-specific data into a single buffer.
+      data.setPosition(csdStartPosition);
+      byte[] buffer = new byte[csdLength];
+      int bufferPosition = 0;
+      for (int i = 0; i < numberOfArrays; i++) {
+        data.skipBytes(1); // completeness (1), nal_unit_type (7)
+        int numberOfNalUnits = data.readUnsignedShort();
+        for (int j = 0; j < numberOfNalUnits; j++) {
+          int nalUnitLength = data.readUnsignedShort();
+          System.arraycopy(NalUnitUtil.NAL_START_CODE, 0, buffer, bufferPosition,
+              NalUnitUtil.NAL_START_CODE.length);
+          bufferPosition += NalUnitUtil.NAL_START_CODE.length;
+          System
+              .arraycopy(data.data, data.getPosition(), buffer, bufferPosition, nalUnitLength);
+          bufferPosition += nalUnitLength;
+          data.skipBytes(nalUnitLength);
+        }
+      }
+
+      List<byte[]> initializationData = csdLength == 0 ? null : Collections.singletonList(buffer);
+      return new HevcConfig(initializationData, lengthSizeMinusOne + 1);
+    } catch (ArrayIndexOutOfBoundsException e) {
+      throw new ParserException("Error parsing HEVC config", e);
+    }
+  }
+
+  private HevcConfig(@Nullable List<byte[]> initializationData, int nalUnitLengthFieldLength) {
+    this.initializationData = initializationData;
+    this.nalUnitLengthFieldLength = nalUnitLengthFieldLength;
+  }
+
+}