content: /*
   * Copyright 2021 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 com.google.android.exoplayer2.transformer;
  
  import com.google.android.exoplayer2.C;
  
  /** A custom interface that determines the speed for media at specific timestamps. */
  /* package */ interface SpeedProvider {
  
    /**
     * Provides the speed that the media should be played at, based on the timeUs.
     *
     * @param timeUs The timestamp of the media.
     * @return The speed that the media should be played at, based on the timeUs.
     */
    float getSpeed(long timeUs);
  
    /**
     * Returns the timestamp of the next speed change, if there is any.
     *
     * @param timeUs A timestamp, in microseconds.
     * @return The timestamp of the next speed change, in microseconds, or {@link C#TIME_UNSET} if
     *     there is no next speed change. If {@code timeUs} corresponds to a speed change, the
     *     returned value corresponds to the following speed change.
     */
    long getNextSpeedChangeTimeUs(long timeUs);
  }
  