TargetAspectRatio.java
/*
* Copyright 2020 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.internal.compat.workaround;
import androidx.annotation.IntDef;
import androidx.annotation.NonNull;
import androidx.annotation.RequiresApi;
import androidx.annotation.RestrictTo;
import androidx.camera.camera2.internal.compat.CameraCharacteristicsCompat;
import androidx.camera.camera2.internal.compat.quirk.AspectRatioLegacyApi21Quirk;
import androidx.camera.camera2.internal.compat.quirk.CameraQuirks;
import androidx.camera.camera2.internal.compat.quirk.DeviceQuirks;
import androidx.camera.camera2.internal.compat.quirk.Nexus4AndroidLTargetAspectRatioQuirk;
import androidx.camera.camera2.internal.compat.quirk.SamsungPreviewTargetAspectRatioQuirk;
import androidx.camera.core.impl.ImageOutputConfig;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
/**
* Workaround to get corrected target aspect ratio.
*
* @see SamsungPreviewTargetAspectRatioQuirk
* @see Nexus4AndroidLTargetAspectRatioQuirk
* @see AspectRatioLegacyApi21Quirk
*/
@RequiresApi(21) // TODO(b/200306659): Remove and replace with annotation on package-info.java
public class TargetAspectRatio {
/** 4:3 standard aspect ratio. */
public static final int RATIO_4_3 = 0;
/** 16:9 standard aspect ratio. */
public static final int RATIO_16_9 = 1;
/** The same aspect ratio as the maximum JPEG resolution. */
public static final int RATIO_MAX_JPEG = 2;
/** No correction is needed. */
public static final int RATIO_ORIGINAL = 3;
/**
* Gets corrected target aspect ratio based on device and camera quirks.
*/
@TargetAspectRatio.Ratio
public int get(@NonNull ImageOutputConfig imageOutputConfig, @NonNull String cameraId,
@NonNull CameraCharacteristicsCompat cameraCharacteristicsCompat) {
final SamsungPreviewTargetAspectRatioQuirk samsungQuirk =
DeviceQuirks.get(SamsungPreviewTargetAspectRatioQuirk.class);
if (samsungQuirk != null && samsungQuirk.require16_9(imageOutputConfig)) {
return TargetAspectRatio.RATIO_16_9;
}
final Nexus4AndroidLTargetAspectRatioQuirk nexus4AndroidLQuirk =
DeviceQuirks.get(Nexus4AndroidLTargetAspectRatioQuirk.class);
if (nexus4AndroidLQuirk != null) {
return nexus4AndroidLQuirk.getCorrectedAspectRatio();
}
final AspectRatioLegacyApi21Quirk quirk = CameraQuirks.get(cameraId,
cameraCharacteristicsCompat).get(AspectRatioLegacyApi21Quirk.class);
if (quirk != null) {
return quirk.getCorrectedAspectRatio();
}
return TargetAspectRatio.RATIO_ORIGINAL;
}
/**
* @hide
*/
@IntDef({RATIO_4_3, RATIO_16_9, RATIO_MAX_JPEG, RATIO_ORIGINAL})
@Retention(RetentionPolicy.SOURCE)
@RestrictTo(RestrictTo.Scope.LIBRARY_GROUP)
public @interface Ratio {
}
}