UseCaseSurfaceOccupancyManager.java
/*
* 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 androidx.camera.core.ImageCapture;
import androidx.camera.core.UseCase;
import androidx.camera.core.VideoCapture;
import java.util.List;
/**
* Collect the use case surface occupancy customization rules in this class to make
* Camera2DeviceSurfaceManager independent from use case type.
*/
final class UseCaseSurfaceOccupancyManager {
private UseCaseSurfaceOccupancyManager() {
}
static void checkUseCaseLimitNotExceeded(
List<UseCase> originalUseCases, List<UseCase> newUseCases) {
int imageCaptureCount = 0;
int videoCaptureCount = 0;
if (newUseCases == null || newUseCases.isEmpty()) {
throw new IllegalArgumentException("No new use cases to be bound.");
}
if (originalUseCases != null) {
for (UseCase useCase : originalUseCases) {
if (useCase instanceof ImageCapture) {
imageCaptureCount++;
} else if (useCase instanceof VideoCapture) {
videoCaptureCount++;
}
}
}
for (UseCase useCase : newUseCases) {
if (useCase instanceof ImageCapture) {
imageCaptureCount++;
} else if (useCase instanceof VideoCapture) {
videoCaptureCount++;
}
}
if (imageCaptureCount > 1) {
throw new IllegalArgumentException(
"Exceeded max simultaneously bound image capture use cases.");
}
if (videoCaptureCount > 1) {
throw new IllegalArgumentException(
"Exceeded max simultaneously bound video capture use cases.");
}
}
}