1 files changed, 209 insertions, 0 deletions
diff --git a/mobile/android/exoplayer2/src/main/java/org/mozilla/thirdparty/com/google/android/exoplayer2/decoder/DecoderInputBuffer.java b/mobile/android/exoplayer2/src/main/java/org/mozilla/thirdparty/com/google/android/exoplayer2/decoder/DecoderInputBuffer.java
new file mode 100644
index 0000000000..254ecfdec8
--- /dev/null
+++ b/mobile/android/exoplayer2/src/main/java/org/mozilla/thirdparty/com/google/android/exoplayer2/decoder/DecoderInputBuffer.java
@@ -0,0 +1,209 @@
+/*
+ * 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.decoder;
+
+import androidx.annotation.IntDef;
+import androidx.annotation.Nullable;
+import org.mozilla.thirdparty.com.google.android.exoplayer2.C;
+import java.lang.annotation.Documented;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.nio.ByteBuffer;
+import org.checkerframework.checker.nullness.qual.EnsuresNonNull;
+
+/**
+ * Holds input for a decoder.
+ */
+public class DecoderInputBuffer extends Buffer {
+
+  /**
+   * The buffer replacement mode, which may disable replacement. One of {@link
+   * #BUFFER_REPLACEMENT_MODE_DISABLED}, {@link #BUFFER_REPLACEMENT_MODE_NORMAL} or {@link
+   * #BUFFER_REPLACEMENT_MODE_DIRECT}.
+   */
+  @Documented
+  @Retention(RetentionPolicy.SOURCE)
+  @IntDef({
+    BUFFER_REPLACEMENT_MODE_DISABLED,
+    BUFFER_REPLACEMENT_MODE_NORMAL,
+    BUFFER_REPLACEMENT_MODE_DIRECT
+  })
+  public @interface BufferReplacementMode {}
+  /**
+   * Disallows buffer replacement.
+   */
+  public static final int BUFFER_REPLACEMENT_MODE_DISABLED = 0;
+  /**
+   * Allows buffer replacement using {@link ByteBuffer#allocate(int)}.
+   */
+  public static final int BUFFER_REPLACEMENT_MODE_NORMAL = 1;
+  /**
+   * Allows buffer replacement using {@link ByteBuffer#allocateDirect(int)}.
+   */
+  public static final int BUFFER_REPLACEMENT_MODE_DIRECT = 2;
+
+  /**
+   * {@link CryptoInfo} for encrypted data.
+   */
+  public final CryptoInfo cryptoInfo;
+
+  /** The buffer's data, or {@code null} if no data has been set. */
+  @Nullable public ByteBuffer data;
+
+  // TODO: Remove this temporary signaling once end-of-stream propagation for clips using content
+  // protection is fixed. See [Internal: b/153326944] for details.
+  /**
+   * Whether the last attempt to read a sample into this buffer failed due to not yet having the DRM
+   * keys associated with the next sample.
+   */
+  public boolean waitingForKeys;
+
+  /**
+   * The time at which the sample should be presented.
+   */
+  public long timeUs;
+
+  /**
+   * Supplemental data related to the buffer, if {@link #hasSupplementalData()} returns true. If
+   * present, the buffer is populated with supplemental data from position 0 to its limit.
+   */
+  @Nullable public ByteBuffer supplementalData;
+
+  @BufferReplacementMode private final int bufferReplacementMode;
+
+  /**
+   * Creates a new instance for which {@link #isFlagsOnly()} will return true.
+   *
+   * @return A new flags only input buffer.
+   */
+  public static DecoderInputBuffer newFlagsOnlyInstance() {
+    return new DecoderInputBuffer(BUFFER_REPLACEMENT_MODE_DISABLED);
+  }
+
+  /**
+   * @param bufferReplacementMode Determines the behavior of {@link #ensureSpaceForWrite(int)}. One
+   *     of {@link #BUFFER_REPLACEMENT_MODE_DISABLED}, {@link #BUFFER_REPLACEMENT_MODE_NORMAL} and
+   *     {@link #BUFFER_REPLACEMENT_MODE_DIRECT}.
+   */
+  public DecoderInputBuffer(@BufferReplacementMode int bufferReplacementMode) {
+    this.cryptoInfo = new CryptoInfo();
+    this.bufferReplacementMode = bufferReplacementMode;
+  }
+
+  /**
+   * Clears {@link #supplementalData} and ensures that it's large enough to accommodate {@code
+   * length} bytes.
+   *
+   * @param length The length of the supplemental data that must be accommodated, in bytes.
+   */
+  @EnsuresNonNull("supplementalData")
+  public void resetSupplementalData(int length) {
+    if (supplementalData == null || supplementalData.capacity() < length) {
+      supplementalData = ByteBuffer.allocate(length);
+    } else {
+      supplementalData.clear();
+    }
+  }
+
+  /**
+   * Ensures that {@link #data} is large enough to accommodate a write of a given length at its
+   * current position.
+   *
+   * <p>If the capacity of {@link #data} is sufficient this method does nothing. If the capacity is
+   * insufficient then an attempt is made to replace {@link #data} with a new {@link ByteBuffer}
+   * whose capacity is sufficient. Data up to the current position is copied to the new buffer.
+   *
+   * @param length The length of the write that must be accommodated, in bytes.
+   * @throws IllegalStateException If there is insufficient capacity to accommodate the write and
+   *     the buffer replacement mode of the holder is {@link #BUFFER_REPLACEMENT_MODE_DISABLED}.
+   */
+  @EnsuresNonNull("data")
+  public void ensureSpaceForWrite(int length) {
+    if (data == null) {
+      data = createReplacementByteBuffer(length);
+      return;
+    }
+    // Check whether the current buffer is sufficient.
+    int capacity = data.capacity();
+    int position = data.position();
+    int requiredCapacity = position + length;
+    if (capacity >= requiredCapacity) {
+      return;
+    }
+    // Instantiate a new buffer if possible.
+    ByteBuffer newData = createReplacementByteBuffer(requiredCapacity);
+    newData.order(data.order());
+    // Copy data up to the current position from the old buffer to the new one.
+    if (position > 0) {
+      data.flip();
+      newData.put(data);
+    }
+    // Set the new buffer.
+    data = newData;
+  }
+
+  /**
+   * Returns whether the buffer is only able to hold flags, meaning {@link #data} is null and
+   * its replacement mode is {@link #BUFFER_REPLACEMENT_MODE_DISABLED}.
+   */
+  public final boolean isFlagsOnly() {
+    return data == null && bufferReplacementMode == BUFFER_REPLACEMENT_MODE_DISABLED;
+  }
+
+  /**
+   * Returns whether the {@link C#BUFFER_FLAG_ENCRYPTED} flag is set.
+   */
+  public final boolean isEncrypted() {
+    return getFlag(C.BUFFER_FLAG_ENCRYPTED);
+  }
+
+  /**
+   * Flips {@link #data} and {@link #supplementalData} in preparation for being queued to a decoder.
+   *
+   * @see java.nio.Buffer#flip()
+   */
+  public final void flip() {
+    data.flip();
+    if (supplementalData != null) {
+      supplementalData.flip();
+    }
+  }
+
+  @Override
+  public void clear() {
+    super.clear();
+    if (data != null) {
+      data.clear();
+    }
+    if (supplementalData != null) {
+      supplementalData.clear();
+    }
+    waitingForKeys = false;
+  }
+
+  private ByteBuffer createReplacementByteBuffer(int requiredCapacity) {
+    if (bufferReplacementMode == BUFFER_REPLACEMENT_MODE_NORMAL) {
+      return ByteBuffer.allocate(requiredCapacity);
+    } else if (bufferReplacementMode == BUFFER_REPLACEMENT_MODE_DIRECT) {
+      return ByteBuffer.allocateDirect(requiredCapacity);
+    } else {
+      int currentCapacity = data == null ? 0 : data.capacity();
+      throw new IllegalStateException("Buffer too small (" + currentCapacity + " < "
+          + requiredCapacity + ")");
+    }
+  }
+
+}