camera/core/src/main/java/androidx/camera/core/CaptureProcessor.java

/*
 * Copyright (C) 2019 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.camera.core;

import android.view.Surface;

import androidx.annotation.RestrictTo;
import androidx.annotation.RestrictTo.Scope;

/**
 * A processing step of the image capture pipeline.
 *
 * @hide
 */
@RestrictTo(Scope.LIBRARY_GROUP)
public interface CaptureProcessor {
    /**
     * This gets called to update where the CaptureProcessor should write the output of {@link
     * #process(ImageProxyBundle)}.
     *
     * @param surface The {@link Surface} that the CaptureProcessor should write data into.
     * @param imageFormat The format of that the surface expects.
     */
    void onOutputSurface(Surface surface, int imageFormat);

    /**
     * Process a {@link ImageProxyBundle} for the set of captures that were
     * requested.
     *
     * <p> The result of the processing step should be written to the {@link Surface} that was
     * received by {@link #onOutputSurface(Surface, int)}.
     * @param bundle The set of images to process. The ImageProxyBundle and the {@link ImageProxy}
     *               that are retrieved from it will become invalid after this method completes, so
     *               no references to them should be kept.
     */
    void process(ImageProxyBundle bundle);
}