Adding upstream version 124.0.1.upstream/124.0.1

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

1 files changed, 132 insertions, 0 deletions

diff --git a/mobile/android/exoplayer2/src/main/java/org/mozilla/thirdparty/com/google/android/exoplayer2/extractor/ogg/OpusReader.java b/mobile/android/exoplayer2/src/main/java/org/mozilla/thirdparty/com/google/android/exoplayer2/extractor/ogg/OpusReader.java
new file mode 100644
index 0000000000..c3f3a13d54
--- /dev/null
+++ b/mobile/android/exoplayer2/src/main/java/org/mozilla/thirdparty/com/google/android/exoplayer2/extractor/ogg/OpusReader.java
@@ -0,0 +1,132 @@
+/*
+ * 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.ogg;
+
+import org.mozilla.thirdparty.com.google.android.exoplayer2.C;
+import org.mozilla.thirdparty.com.google.android.exoplayer2.Format;
+import org.mozilla.thirdparty.com.google.android.exoplayer2.util.MimeTypes;
+import org.mozilla.thirdparty.com.google.android.exoplayer2.util.ParsableByteArray;
+import java.nio.ByteBuffer;
+import java.nio.ByteOrder;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.List;
+
+/**
+ * {@link StreamReader} to extract Opus data out of Ogg byte stream.
+ */
+/* package */ final class OpusReader extends StreamReader {
+
+  private static final int DEFAULT_SEEK_PRE_ROLL_SAMPLES = 3840;
+
+  /**
+   * Opus streams are always decoded at 48000 Hz.
+   */
+  private static final int SAMPLE_RATE = 48000;
+
+  private static final int OPUS_CODE = 0x4f707573;
+  private static final byte[] OPUS_SIGNATURE = {'O', 'p', 'u', 's', 'H', 'e', 'a', 'd'};
+
+  private boolean headerRead;
+
+  public static boolean verifyBitstreamType(ParsableByteArray data) {
+    if (data.bytesLeft() < OPUS_SIGNATURE.length) {
+      return false;
+    }
+    byte[] header = new byte[OPUS_SIGNATURE.length];
+    data.readBytes(header, 0, OPUS_SIGNATURE.length);
+    return Arrays.equals(header, OPUS_SIGNATURE);
+  }
+
+  @Override
+  protected void reset(boolean headerData) {
+    super.reset(headerData);
+    if (headerData) {
+      headerRead = false;
+    }
+  }
+
+  @Override
+  protected long preparePayload(ParsableByteArray packet) {
+    return convertTimeToGranule(getPacketDurationUs(packet.data));
+  }
+
+  @Override
+  protected boolean readHeaders(ParsableByteArray packet, long position, SetupData setupData) {
+    if (!headerRead) {
+      byte[] metadata = Arrays.copyOf(packet.data, packet.limit());
+      int channelCount = metadata[9] & 0xFF;
+      int preskip = ((metadata[11] & 0xFF) << 8) | (metadata[10] & 0xFF);
+
+      List<byte[]> initializationData = new ArrayList<>(3);
+      initializationData.add(metadata);
+      putNativeOrderLong(initializationData, preskip);
+      putNativeOrderLong(initializationData, DEFAULT_SEEK_PRE_ROLL_SAMPLES);
+
+      setupData.format = Format.createAudioSampleFormat(null, MimeTypes.AUDIO_OPUS, null,
+          Format.NO_VALUE, Format.NO_VALUE, channelCount, SAMPLE_RATE, initializationData, null, 0,
+          null);
+      headerRead = true;
+    } else {
+      boolean headerPacket = packet.readInt() == OPUS_CODE;
+      packet.setPosition(0);
+      return headerPacket;
+    }
+    return true;
+  }
+
+  private void putNativeOrderLong(List<byte[]> initializationData, int samples) {
+    long ns = (samples * C.NANOS_PER_SECOND) / SAMPLE_RATE;
+    byte[] array = ByteBuffer.allocate(8).order(ByteOrder.nativeOrder()).putLong(ns).array();
+    initializationData.add(array);
+  }
+
+  /**
+   * Returns the duration of the given audio packet.
+   *
+   * @param packet Contains audio data.
+   * @return Returns the duration of the given audio packet.
+   */
+  private long getPacketDurationUs(byte[] packet) {
+    int toc = packet[0] & 0xFF;
+    int frames;
+    switch (toc & 0x3) {
+      case 0:
+        frames = 1;
+        break;
+      case 1:
+      case 2:
+        frames = 2;
+        break;
+      default:
+        frames = packet[1] & 0x3F;
+        break;
+    }
+
+    int config = toc >> 3;
+    int length = config & 0x3;
+    if (config >= 16) {
+      length = 2500 << length;
+    } else if (config >= 12) {
+      length = 10000 << (length & 0x1);
+    } else if (length == 3) {
+      length = 60000;
+    } else {
+      length = 10000 << length;
+    }
+    return (long) frames * length;
+  }
+}