ColorLut.java
/*
* Copyright 2022 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 androidx.media3.effect;
import android.content.Context;
import androidx.annotation.WorkerThread;
import androidx.media3.common.FrameProcessingException;
import androidx.media3.common.util.GlUtil;
import androidx.media3.common.util.UnstableApi;
/**
* Specifies color transformations using color lookup tables to apply to each frame in the fragment
* shader.
*/
@UnstableApi
public interface ColorLut extends GlEffect {
/**
* Returns the OpenGL texture ID of the LUT to apply to the pixels of the frame with the given
* timestamp.
*/
int getLutTextureId(long presentationTimeUs);
/** Returns the length N of the 3D N x N x N LUT cube with the given timestamp. */
int getLength(long presentationTimeUs);
/** Releases the OpenGL texture of the LUT. */
void release() throws GlUtil.GlException;
/** This method must be executed on the same thread as other GL commands. */
@Override
@WorkerThread
default SingleFrameGlTextureProcessor toGlTextureProcessor(Context context, boolean useHdr)
throws FrameProcessingException {
return new ColorLutProcessor(context, /* colorLut= */ this, useHdr);
}
}