Adding upstream version 115.7.0esr.upstream/115.7.0esrupstream

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

1 files changed, 96 insertions, 0 deletions

diff --git a/mobile/android/exoplayer2/src/main/java/org/mozilla/thirdparty/com/google/android/exoplayer2/extractor/ts/TsUtil.java b/mobile/android/exoplayer2/src/main/java/org/mozilla/thirdparty/com/google/android/exoplayer2/extractor/ts/TsUtil.java
new file mode 100644
index 0000000000..8cd24ff1e9
--- /dev/null
+++ b/mobile/android/exoplayer2/src/main/java/org/mozilla/thirdparty/com/google/android/exoplayer2/extractor/ts/TsUtil.java
@@ -0,0 +1,96 @@
+/*
+ * Copyright (C) 2018 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.C;
+import org.mozilla.thirdparty.com.google.android.exoplayer2.util.ParsableByteArray;
+
+/** Utilities method for extracting MPEG-TS streams. */
+public final class TsUtil {
+  /**
+   * Returns the position of the first TS_SYNC_BYTE within the range [startPosition, limitPosition)
+   * from the provided data array, or returns limitPosition if sync byte could not be found.
+   */
+  public static int findSyncBytePosition(byte[] data, int startPosition, int limitPosition) {
+    int position = startPosition;
+    while (position < limitPosition && data[position] != TsExtractor.TS_SYNC_BYTE) {
+      position++;
+    }
+    return position;
+  }
+
+  /**
+   * Returns the PCR value read from a given TS packet.
+   *
+   * @param packetBuffer The buffer that holds the packet.
+   * @param startOfPacket The starting position of the packet in the buffer.
+   * @param pcrPid The PID for valid packets that contain PCR values.
+   * @return The PCR value read from the packet, if its PID is equal to {@code pcrPid} and it
+   *     contains a valid PCR value. Returns {@link C#TIME_UNSET} otherwise.
+   */
+  public static long readPcrFromPacket(
+      ParsableByteArray packetBuffer, int startOfPacket, int pcrPid) {
+    packetBuffer.setPosition(startOfPacket);
+    if (packetBuffer.bytesLeft() < 5) {
+      // Header = 4 bytes, adaptationFieldLength = 1 byte.
+      return C.TIME_UNSET;
+    }
+    // Note: See ISO/IEC 13818-1, section 2.4.3.2 for details of the header format.
+    int tsPacketHeader = packetBuffer.readInt();
+    if ((tsPacketHeader & 0x800000) != 0) {
+      // transport_error_indicator != 0 means there are uncorrectable errors in this packet.
+      return C.TIME_UNSET;
+    }
+    int pid = (tsPacketHeader & 0x1FFF00) >> 8;
+    if (pid != pcrPid) {
+      return C.TIME_UNSET;
+    }
+    boolean adaptationFieldExists = (tsPacketHeader & 0x20) != 0;
+    if (!adaptationFieldExists) {
+      return C.TIME_UNSET;
+    }
+
+    int adaptationFieldLength = packetBuffer.readUnsignedByte();
+    if (adaptationFieldLength >= 7 && packetBuffer.bytesLeft() >= 7) {
+      int flags = packetBuffer.readUnsignedByte();
+      boolean pcrFlagSet = (flags & 0x10) == 0x10;
+      if (pcrFlagSet) {
+        byte[] pcrBytes = new byte[6];
+        packetBuffer.readBytes(pcrBytes, /* offset= */ 0, pcrBytes.length);
+        return readPcrValueFromPcrBytes(pcrBytes);
+      }
+    }
+    return C.TIME_UNSET;
+  }
+
+  /**
+   * Returns the value of PCR base - first 33 bits in big endian order from the PCR bytes.
+   *
+   * <p>We ignore PCR Ext, because it's too small to have any significance.
+   */
+  private static long readPcrValueFromPcrBytes(byte[] pcrBytes) {
+    return (pcrBytes[0] & 0xFFL) << 25
+        | (pcrBytes[1] & 0xFFL) << 17
+        | (pcrBytes[2] & 0xFFL) << 9
+        | (pcrBytes[3] & 0xFFL) << 1
+        | (pcrBytes[4] & 0xFFL) >> 7;
+  }
+
+  private TsUtil() {
+    // Prevent instantiation.
+  }
+}