SpeedChangeEffect.java
/*
* Copyright 2023 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
*
* https://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 androidx.media3.effect;
import static androidx.media3.common.util.Assertions.checkArgument;
import android.content.Context;
import androidx.annotation.FloatRange;
import androidx.media3.common.VideoFrameProcessingException;
import androidx.media3.common.util.UnstableApi;
/**
* Applies a speed change by updating the frame timestamps.
*
* <p>This effect doesn't drop any frames.
*/
@UnstableApi
public final class SpeedChangeEffect implements GlEffect {
private final float speed;
/** Creates an instance. */
public SpeedChangeEffect(@FloatRange(from = 0, fromInclusive = false) float speed) {
checkArgument(speed > 0f);
this.speed = speed;
}
@Override
public GlShaderProgram toGlShaderProgram(Context context, boolean useHdr)
throws VideoFrameProcessingException {
return new SpeedChangeShaderProgram(context, speed, useHdr);
}
@Override
public boolean isNoOp(int inputWidth, int inputHeight) {
return speed == 1f;
}
}