1 files changed, 306 insertions, 0 deletions
diff --git a/mobile/android/exoplayer2/src/main/java/org/mozilla/thirdparty/com/google/android/exoplayer2/NoSampleRenderer.java b/mobile/android/exoplayer2/src/main/java/org/mozilla/thirdparty/com/google/android/exoplayer2/NoSampleRenderer.java
new file mode 100644
index 0000000000..c4662f1544
--- /dev/null
+++ b/mobile/android/exoplayer2/src/main/java/org/mozilla/thirdparty/com/google/android/exoplayer2/NoSampleRenderer.java
@@ -0,0 +1,306 @@
+/*
+ * 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;
+
+import androidx.annotation.Nullable;
+import org.mozilla.thirdparty.com.google.android.exoplayer2.source.SampleStream;
+import org.mozilla.thirdparty.com.google.android.exoplayer2.util.Assertions;
+import org.mozilla.thirdparty.com.google.android.exoplayer2.util.MediaClock;
+import java.io.IOException;
+import org.checkerframework.checker.nullness.qual.MonotonicNonNull;
+
+/**
+ * A {@link Renderer} implementation whose track type is {@link C#TRACK_TYPE_NONE} and does not
+ * consume data from its {@link SampleStream}.
+ */
+public abstract class NoSampleRenderer implements Renderer, RendererCapabilities {
+
+  @MonotonicNonNull private RendererConfiguration configuration;
+  private int index;
+  private int state;
+  @Nullable private SampleStream stream;
+  private boolean streamIsFinal;
+
+  @Override
+  public final int getTrackType() {
+    return C.TRACK_TYPE_NONE;
+  }
+
+  @Override
+  public final RendererCapabilities getCapabilities() {
+    return this;
+  }
+
+  @Override
+  public final void setIndex(int index) {
+    this.index = index;
+  }
+
+  @Override
+  @Nullable
+  public MediaClock getMediaClock() {
+    return null;
+  }
+
+  @Override
+  public final int getState() {
+    return state;
+  }
+
+  /**
+   * Replaces the {@link SampleStream} that will be associated with this renderer.
+   * <p>
+   * This method may be called when the renderer is in the following states:
+   * {@link #STATE_DISABLED}.
+   *
+   * @param configuration The renderer configuration.
+   * @param formats The enabled formats. Should be empty.
+   * @param stream The {@link SampleStream} from which the renderer should consume.
+   * @param positionUs The player's current position.
+   * @param joining Whether this renderer is being enabled to join an ongoing playback.
+   * @param offsetUs The offset that should be subtracted from {@code positionUs}
+   *     to get the playback position with respect to the media.
+   * @throws ExoPlaybackException If an error occurs.
+   */
+  @Override
+  public final void enable(RendererConfiguration configuration, Format[] formats,
+      SampleStream stream, long positionUs, boolean joining, long offsetUs)
+      throws ExoPlaybackException {
+    Assertions.checkState(state == STATE_DISABLED);
+    this.configuration = configuration;
+    state = STATE_ENABLED;
+    onEnabled(joining);
+    replaceStream(formats, stream, offsetUs);
+    onPositionReset(positionUs, joining);
+  }
+
+  @Override
+  public final void start() throws ExoPlaybackException {
+    Assertions.checkState(state == STATE_ENABLED);
+    state = STATE_STARTED;
+    onStarted();
+  }
+
+  /**
+   * Replaces the {@link SampleStream} that will be associated with this renderer.
+   * <p>
+   * This method may be called when the renderer is in the following states:
+   * {@link #STATE_ENABLED}, {@link #STATE_STARTED}.
+   *
+   * @param formats The enabled formats. Should be empty.
+   * @param stream The {@link SampleStream} to be associated with this renderer.
+   * @param offsetUs The offset that should be subtracted from {@code positionUs} in
+   *     {@link #render(long, long)} to get the playback position with respect to the media.
+   * @throws ExoPlaybackException If an error occurs.
+   */
+  @Override
+  public final void replaceStream(Format[] formats, SampleStream stream, long offsetUs)
+      throws ExoPlaybackException {
+    Assertions.checkState(!streamIsFinal);
+    this.stream = stream;
+    onRendererOffsetChanged(offsetUs);
+  }
+
+  @Override
+  @Nullable
+  public final SampleStream getStream() {
+    return stream;
+  }
+
+  @Override
+  public final boolean hasReadStreamToEnd() {
+    return true;
+  }
+
+  @Override
+  public long getReadingPositionUs() {
+    return C.TIME_END_OF_SOURCE;
+  }
+
+  @Override
+  public final void setCurrentStreamFinal() {
+    streamIsFinal = true;
+  }
+
+  @Override
+  public final boolean isCurrentStreamFinal() {
+    return streamIsFinal;
+  }
+
+  @Override
+  public final void maybeThrowStreamError() throws IOException {
+  }
+
+  @Override
+  public final void resetPosition(long positionUs) throws ExoPlaybackException {
+    streamIsFinal = false;
+    onPositionReset(positionUs, false);
+  }
+
+  @Override
+  public final void stop() throws ExoPlaybackException {
+    Assertions.checkState(state == STATE_STARTED);
+    state = STATE_ENABLED;
+    onStopped();
+  }
+
+  @Override
+  public final void disable() {
+    Assertions.checkState(state == STATE_ENABLED);
+    state = STATE_DISABLED;
+    stream = null;
+    streamIsFinal = false;
+    onDisabled();
+  }
+
+  @Override
+  public final void reset() {
+    Assertions.checkState(state == STATE_DISABLED);
+    onReset();
+  }
+
+  @Override
+  public boolean isReady() {
+    return true;
+  }
+
+  @Override
+  public boolean isEnded() {
+    return true;
+  }
+
+  // RendererCapabilities implementation.
+
+  @Override
+  @Capabilities
+  public int supportsFormat(Format format) throws ExoPlaybackException {
+    return RendererCapabilities.create(FORMAT_UNSUPPORTED_TYPE);
+  }
+
+  @Override
+  @AdaptiveSupport
+  public int supportsMixedMimeTypeAdaptation() throws ExoPlaybackException {
+    return ADAPTIVE_NOT_SUPPORTED;
+  }
+
+  // PlayerMessage.Target implementation.
+
+  @Override
+  public void handleMessage(int what, @Nullable Object object) throws ExoPlaybackException {
+    // Do nothing.
+  }
+
+  // Methods to be overridden by subclasses.
+
+  /**
+   * Called when the renderer is enabled.
+   * <p>
+   * The default implementation is a no-op.
+   *
+   * @param joining Whether this renderer is being enabled to join an ongoing playback.
+   * @throws ExoPlaybackException If an error occurs.
+   */
+  protected void onEnabled(boolean joining) throws ExoPlaybackException {
+    // Do nothing.
+  }
+
+  /**
+   * Called when the renderer's offset has been changed.
+   * <p>
+   * The default implementation is a no-op.
+   *
+   * @param offsetUs The offset that should be subtracted from {@code positionUs} in
+   *     {@link #render(long, long)} to get the playback position with respect to the media.
+   * @throws ExoPlaybackException If an error occurs.
+   */
+  protected void onRendererOffsetChanged(long offsetUs) throws ExoPlaybackException {
+    // Do nothing.
+  }
+
+  /**
+   * Called when the position is reset. This occurs when the renderer is enabled after
+   * {@link #onRendererOffsetChanged(long)} has been called, and also when a position
+   * discontinuity is encountered.
+   * <p>
+   * The default implementation is a no-op.
+   *
+   * @param positionUs The new playback position in microseconds.
+   * @param joining Whether this renderer is being enabled to join an ongoing playback.
+   * @throws ExoPlaybackException If an error occurs.
+   */
+  protected void onPositionReset(long positionUs, boolean joining) throws ExoPlaybackException {
+    // Do nothing.
+  }
+
+  /**
+   * Called when the renderer is started.
+   * <p>
+   * The default implementation is a no-op.
+   *
+   * @throws ExoPlaybackException If an error occurs.
+   */
+  protected void onStarted() throws ExoPlaybackException {
+    // Do nothing.
+  }
+
+  /**
+   * Called when the renderer is stopped.
+   * <p>
+   * The default implementation is a no-op.
+   *
+   * @throws ExoPlaybackException If an error occurs.
+   */
+  protected void onStopped() throws ExoPlaybackException {
+    // Do nothing.
+  }
+
+  /**
+   * Called when the renderer is disabled.
+   * <p>
+   * The default implementation is a no-op.
+   */
+  protected void onDisabled() {
+    // Do nothing.
+  }
+
+  /**
+   * Called when the renderer is reset.
+   *
+   * <p>The default implementation is a no-op.
+   */
+  protected void onReset() {
+    // Do nothing.
+  }
+
+  // Methods to be called by subclasses.
+
+  /**
+   * Returns the configuration set when the renderer was most recently enabled, or {@code null} if
+   * the renderer has never been enabled.
+   */
+  @Nullable
+  protected final RendererConfiguration getConfiguration() {
+    return configuration;
+  }
+
+  /**
+   * Returns the index of the renderer within the player.
+   */
+  protected final int getIndex() {
+    return index;
+  }
+
+}