CameraHelperGB.java

/*
 * Copyright (C) 2012 CyberAgent
 *
 * 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 com.yokmama.learn10.chapter10.lesson42.utils;

import android.annotation.TargetApi;
import android.hardware.Camera;
import android.hardware.Camera.CameraInfo;

@TargetApi(9)
public class CameraHelperGB implements CameraHelper.CameraHelperImpl {

    @Override
    public int getNumberOfCameras() {
        return Camera.getNumberOfCameras();
    }

    @Override
    public Camera openCamera(final int id) {
        return Camera.open(id);
    }

    @Override
    public Camera openDefaultCamera() {
        return Camera.open(0);
    }

    @Override
    public boolean hasCamera(final int facing) {
        return getCameraId(facing) != -1;
    }

    @Override
    public Camera openCameraFacing(final int facing) {
        return Camera.open(getCameraId(facing));
    }

    @Override
    public void getCameraInfo(final int cameraId, final CameraHelper.CameraInfo2 cameraInfo) {
        CameraInfo info = new CameraInfo();
        Camera.getCameraInfo(cameraId, info);
        cameraInfo.facing = info.facing;
        cameraInfo.orientation = info.orientation;
    }

    private int getCameraId(final int facing) {
        int numberOfCameras = Camera.getNumberOfCameras();
        CameraInfo info = new CameraInfo();
        for (int id = 0; id < numberOfCameras; id++) {
            Camera.getCameraInfo(id, info);
            if (info.facing == facing) {
                return id;
            }
        }
        return -1;
    }
}