public final class

VideoCaptureConfigProvider

extends java.lang.Object

implements ConfigProvider<VideoCaptureConfig>

 java.lang.Object

↳androidx.camera.camera2.impl.VideoCaptureConfigProvider

Overview

Provides defaults for VideoCaptureConfig in the Camera2 implementation.

Summary

Constructors
publicVideoCaptureConfigProvider(CameraFactory cameraFactory, Context context)

Methods
public VideoCaptureConfiggetConfig(LensFacing lensFacing)

from java.lang.Objectclone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructors

public VideoCaptureConfigProvider(CameraFactory cameraFactory, Context context)

Methods

public VideoCaptureConfig getConfig(LensFacing lensFacing)

Source

/*
 * Copyright 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.camera2.impl;

import android.content.Context;
import android.hardware.camera2.CameraDevice;
import android.util.Log;
import android.util.Rational;
import android.view.WindowManager;

import androidx.annotation.RestrictTo;
import androidx.annotation.RestrictTo.Scope;
import androidx.camera.core.CameraFactory;
import androidx.camera.core.CameraX;
import androidx.camera.core.CameraX.LensFacing;
import androidx.camera.core.CaptureConfig;
import androidx.camera.core.ConfigProvider;
import androidx.camera.core.SessionConfig;
import androidx.camera.core.VideoCapture;
import androidx.camera.core.VideoCaptureConfig;

/**
 * Provides defaults for {@link VideoCaptureConfig} in the Camera2 implementation.
 * @hide
 */
@RestrictTo(Scope.LIBRARY)
public final class VideoCaptureConfigProvider implements ConfigProvider<VideoCaptureConfig> {
    private static final String TAG = "VideoCaptureProvider";
    private static final Rational DEFAULT_ASPECT_RATIO_16_9 = new Rational(16, 9);
    private static final Rational DEFAULT_ASPECT_RATIO_9_16 = new Rational(9, 16);

    private final CameraFactory mCameraFactory;
    private final WindowManager mWindowManager;

    public VideoCaptureConfigProvider(CameraFactory cameraFactory, Context context) {
        mCameraFactory = cameraFactory;
        mWindowManager = (WindowManager) context.getSystemService(Context.WINDOW_SERVICE);
    }

    @Override
    public VideoCaptureConfig getConfig(LensFacing lensFacing) {
        VideoCaptureConfig.Builder builder =
                VideoCaptureConfig.Builder.fromConfig(
                        VideoCapture.DEFAULT_CONFIG.getConfig(lensFacing));

        // SessionConfig containing all intrinsic properties needed for VideoCapture
        SessionConfig.Builder sessionBuilder = new SessionConfig.Builder();
        // TODO(b/114762170): Must set to preview here until we allow for multiple template types
        sessionBuilder.setTemplateType(CameraDevice.TEMPLATE_PREVIEW);

        // Add options to UseCaseConfig
        builder.setDefaultSessionConfig(sessionBuilder.build());
        builder.setSessionOptionUnpacker(Camera2SessionOptionUnpacker.INSTANCE);

        CaptureConfig.Builder captureBuilder = new CaptureConfig.Builder();
        captureBuilder.setTemplateType(CameraDevice.TEMPLATE_PREVIEW);
        builder.setDefaultCaptureConfig(captureBuilder.build());
        builder.setCaptureOptionUnpacker(Camera2CaptureOptionUnpacker.INSTANCE);

        try {
            // Add default lensFacing if we can
            LensFacing checkedLensFacing =
                    (lensFacing != null) ? lensFacing : CameraX.getDefaultLensFacing();
            String defaultId = mCameraFactory.cameraIdForLensFacing(checkedLensFacing);
            if (defaultId != null) {
                builder.setLensFacing(checkedLensFacing);
            }

            int targetRotation = mWindowManager.getDefaultDisplay().getRotation();
            int rotationDegrees = CameraX.getCameraInfo(defaultId).getSensorRotationDegrees(
                    targetRotation);
            boolean isRotateNeeded = (rotationDegrees == 90 || rotationDegrees == 270);
            builder.setTargetRotation(targetRotation);
            builder.setTargetAspectRatioCustom(
                    isRotateNeeded ? DEFAULT_ASPECT_RATIO_9_16 : DEFAULT_ASPECT_RATIO_16_9);
        } catch (Exception e) {
            Log.w(TAG, "Unable to determine default lens facing for VideoCapture.", e);
        }

        return builder.build();
    }
}