1 files changed, 113 insertions, 0 deletions
diff --git a/mobile/android/exoplayer2/src/main/java/org/mozilla/thirdparty/com/google/android/exoplayer2/PlaybackParameters.java b/mobile/android/exoplayer2/src/main/java/org/mozilla/thirdparty/com/google/android/exoplayer2/PlaybackParameters.java
new file mode 100644
index 0000000000..fd47117aba
--- /dev/null
+++ b/mobile/android/exoplayer2/src/main/java/org/mozilla/thirdparty/com/google/android/exoplayer2/PlaybackParameters.java
@@ -0,0 +1,113 @@
+/*
+ * Copyright (C) 2017 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.util.Assertions;
+
+/**
+ * The parameters that apply to playback.
+ */
+public final class PlaybackParameters {
+
+  /**
+   * The default playback parameters: real-time playback with no pitch modification or silence
+   * skipping.
+   */
+  public static final PlaybackParameters DEFAULT = new PlaybackParameters(/* speed= */ 1f);
+
+  /** The factor by which playback will be sped up. */
+  public final float speed;
+
+  /** The factor by which the audio pitch will be scaled. */
+  public final float pitch;
+
+  /** Whether to skip silence in the input. */
+  public final boolean skipSilence;
+
+  private final int scaledUsPerMs;
+
+  /**
+   * Creates new playback parameters that set the playback speed.
+   *
+   * @param speed The factor by which playback will be sped up. Must be greater than zero.
+   */
+  public PlaybackParameters(float speed) {
+    this(speed, /* pitch= */ 1f, /* skipSilence= */ false);
+  }
+
+  /**
+   * Creates new playback parameters that set the playback speed and audio pitch scaling factor.
+   *
+   * @param speed The factor by which playback will be sped up. Must be greater than zero.
+   * @param pitch The factor by which the audio pitch will be scaled. Must be greater than zero.
+   */
+  public PlaybackParameters(float speed, float pitch) {
+    this(speed, pitch, /* skipSilence= */ false);
+  }
+
+  /**
+   * Creates new playback parameters that set the playback speed, audio pitch scaling factor and
+   * whether to skip silence in the audio stream.
+   *
+   * @param speed The factor by which playback will be sped up. Must be greater than zero.
+   * @param pitch The factor by which the audio pitch will be scaled. Must be greater than zero.
+   * @param skipSilence Whether to skip silences in the audio stream.
+   */
+  public PlaybackParameters(float speed, float pitch, boolean skipSilence) {
+    Assertions.checkArgument(speed > 0);
+    Assertions.checkArgument(pitch > 0);
+    this.speed = speed;
+    this.pitch = pitch;
+    this.skipSilence = skipSilence;
+    scaledUsPerMs = Math.round(speed * 1000f);
+  }
+
+  /**
+   * Returns the media time in microseconds that will elapse in {@code timeMs} milliseconds of
+   * wallclock time.
+   *
+   * @param timeMs The time to scale, in milliseconds.
+   * @return The scaled time, in microseconds.
+   */
+  public long getMediaTimeUsForPlayoutTimeMs(long timeMs) {
+    return timeMs * scaledUsPerMs;
+  }
+
+  @Override
+  public boolean equals(@Nullable Object obj) {
+    if (this == obj) {
+      return true;
+    }
+    if (obj == null || getClass() != obj.getClass()) {
+      return false;
+    }
+    PlaybackParameters other = (PlaybackParameters) obj;
+    return this.speed == other.speed
+        && this.pitch == other.pitch
+        && this.skipSilence == other.skipSilence;
+  }
+
+  @Override
+  public int hashCode() {
+    int result = 17;
+    result = 31 * result + Float.floatToRawIntBits(speed);
+    result = 31 * result + Float.floatToRawIntBits(pitch);
+    result = 31 * result + (skipSilence ? 1 : 0);
+    return result;
+  }
+
+}