Camera Paramter 深度封装( 第一弹 )

于 2016-12-06 10:09:28 发布
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分类专栏： Android Camera paramter
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本文链接：https://blog.youkuaiyun.com/github_35218834/article/details/53483519
这篇博客主要介绍了在实习期间对相机参数进行深度封装的过程，以解决获取参数信息不全面的问题。作者提供了代码仓库链接，并详细说明了如何封装全局相机参数以及构建CameraParamter操作类，特别是如何构建PictureSizes集合。

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概要

实习期间,需要相机的参数进行调用,通常我们调用的时候就直接通过调用Camera.getParamters( )就可以获得其中参数信息,但是,在开发的过程中就会发现了一个问题,其中的一些参数信息的获取是不全面的,例如:有一些参数信息室友isSupported( )方法去判断是否支持的,有一些是没有的.这就需要对相机参数进行进一步封装.


先附上代码地址：https://github.com/DoggyZhang/CameraParamter

1,封装全局相机参数

首先创建出对相机参数信息的简单枚举封装

public enum Ratio {
    R_4x3(
            0, 4, 3, "4:3"),
    R_16x9(
            1, 16, 9, "16:9");

    private int id;

    public int w;

    public int h;

    private String name;

    Ratio(int id, int w, int h, String name) {
        this.id = id;
        this.w = w;
        this.h = h;
        this.name = name;
    }

    public int getId() {
        return id;
    }

    public static Ratio getRatioById(int id) {
        for (Ratio ratio : values()) {
            if (ratio.id == id) {
                return ratio;
            }
        }
        return Ratio.R_16x9;
    }

    public static Ratio getRatioByName(String name) {
        for (Ratio ratio : values()) {
            if (ratio.toString().compareTo(name) == 0) {
                return ratio;
            }
        }
        return Ratio.R_16x9;
    }

    public static Ratio pickRatio(int width, int height) {
        for (Ratio ratio : values()) {
            float orignalRatio = ratio.w * 1.0f / ratio.h;
            float targetRatio = width * 1.0f / height;
            if (Math.abs(orignalRatio - targetRatio) < 0.1f) {
                return ratio;
            }
        }
        return Ratio.R_16x9;
    }

    @Override
    public String toString() {
        return name;
    }

}
这里需要注意一点，使用枚举的原因是因为这些属性都是一些常量值，而且我们在构建相对应的对象的时候，也会十分的方便
列出需要的一些枚举类



2,构建CameraParamter操作类

这个类写的我真是心累，挫了1000多行代码，不说废话了。
该类的主要功能就是
1. 判断相机是否支持该参数
2. 获取相机支持的参数列表
3. 设置相机支持的参数

简单的附上类的属性

这样写的灵感还是来源于前面提起的开源项目，比较巧妙的利用集合封装了相机支持并可以设置的参数信息，这里封装的比也行就不用多说了。

列举其中 PictureSizes 是如何构建出来的

构建相对应的集合

/**
     * PictureSize
     *
     * @param sizes 获取相机支持的 pictureSize , Camera.paramter.getSupportedPictureSizes()方法获得
     * @return
     */
    private Map<Ratio, Map<Quality, Size>> buildPictureSizesRatioMap(List<Size> sizes) {
        Map<Ratio, Map<Quality, Size>> map = new HashMap<>();

        Map<Ratio, List<Size>> ratioListMap = new HashMap<>();
        // 选出Ratio.R_4x3 , Ratio.R_16x9 比例对应的大小集合
        for (Size size : sizes) {
            Ratio ratio = Ratio.pickRatio(size.width, size.height);
            if (ratio != null) {
                List<Size> sizeList = ratioListMap.get(ratio);
                if (sizeList == null) {
                    sizeList = new ArrayList<>();
                    ratioListMap.put(ratio, sizeList);
                }
                sizeList.add(size);
            }
        }
        // 挑出集合中的前三个作为不同 picture 质量
        for (Ratio r : ratioListMap.keySet()) {
            List<Size> list = ratioListMap.get(r);
            ratioListMap.put(r, sortSizes(list));
            Map<Quality, Size> sizeMap = new HashMap<>();
            int i = 0;
            for (Quality q : Quality.values()) {
                Size size = null;
                if (i < list.size()) {
                    size = list.get(i++);
                }
                sizeMap.put(q, size);
            }
            map.put(r, sizeMap);
        }

        return map;
    }







设置对应的相机信息


/**
     * 设置 PictureSize
     * @param ratio Picture 比例
     * @param quality Picture 在该比例下的图片质量 
     */
    public void setPictureSize(@NonNull Ratio ratio, Quality quality) {
        if (mCameraParamter == null) {
            throw new RuntimeException("CameraParamter is null , please inject MyCameraParamter.getInstance() !!!");
        }
        if (!isInit) {
            throw new RuntimeException("CameraParamter is not init , please inject MyCameraParamter.initParams !!!");
        }
        if (!supportPictureSize) {
            return;
        }
        // 默认是 16 ： 9 的图片比例
        if (this.pictureRatio != ratio) {
            if (ratio == null) {
                ratio = Ratio.R_16x9;
            }
            this.pictureRatio = ratio;
        }
        
        // 默认高质量图片
        if (this.pictureQuality != quality) {
            if (quality == null) {
                quality = Quality.HIGH;
            }
            this.pictureQuality = quality;
            mParameters.setJpegQuality(quality.getQualityValue());
            // 存入 SharePreferences ， 以方便下次初始化的时候使用
            PreferenceUtils.put(mContext, PreferenceConfiguration.PICTURE_QUALITY, this.pictureQuality.toString());
        }

        Size size = pictureSizes.get(ratio).get(quality);
        if (size != null) {
            mParameters.setPictureSize(size.width, size.height);
        }
    }




3. 使用CameraParatmer




初始化相机参数


初始化Camera对象，并获取CameraParamter的对象（单例）


/**
     * 初始化相机
     *
     * @param cameraID CAMERA_ID_BACK , CAMERA_ID_FRONT
     *                 默认是 back
     */
    private void initCamera(int cameraID) {
        mCameraCount = Camera.getNumberOfCameras();
        mSupportedFrontCamera = false;
        if (mCameraCount > 1) {
            mSupportedFrontCamera = true;
        }

        // 默认打开后置摄像头
        switch (cameraID) {
            case CAMERA_ID_BACK:
                mCurrentCameraID = CAMERA_ID_BACK;
                break;
            case CAMERA_ID_FRONT:
                if (mSupportedFrontCamera) {
                    mCurrentCameraID = CAMERA_ID_FRONT;
                } else {
                    Toast.makeText(getContext(), "不支持前置摄像头", Toast.LENGTH_SHORT).show();
                    mCurrentCameraID = CAMERA_ID_BACK;
                }
                break;
            default:
                mCurrentCameraID = CAMERA_ID_BACK;
                break;
        }
        mCamera = Camera.open(mCurrentCameraID);
        if (mCamera == null) {
            Toast.makeText(getContext(), "打开相机失败", Toast.LENGTH_SHORT).show();
            throw new RuntimeException("fail to open camera !!!");
        }


	// 这里是初始化CameraParamter， 一定要记得调用initParams（）
        mCameraParamter = CameraParamter.getInstance(getContext(), mCamera.getParameters());
        mCameraParamter.initParams();
        mCamera.setParameters(mCameraParamter.getParameters());

        mCamera.setDisplayOrientation(CAMERA_DISPLAY_ORIENTATION);

        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR1) {
            mCamera.enableShutterSound(true);
            isShutterSoundEnable = true;
        }

        mCamera.setFaceDetectionListener(new Camera.FaceDetectionListener() {
            @Override
            public void onFaceDetection(Camera.Face[] faces, Camera camera) {
                Toast.makeText(getContext(), "检测到了 " + faces.length + " 张脸", Toast.LENGTH_SHORT).show();
            }
        });
    }




设置相机参数


这里使用了自定义了接口，通过接口回调的方式来动态的设置相机参数


接口：


public interface OnCameraParamterChangeListener {
    void onFaceDetectChange(CameraParamter cameraParamter, boolean isOpen);

    void onFocusModeChange(CameraParamter cameraParamter, FocusMode focusMode);

    void onPreviewRatioChange(CameraParamter cameraParamter, Ratio ratio);

    void onPictureRatioChange(CameraParamter cameraParamter, Ratio ratio);

    void onPictureQualityChange(CameraParamter cameraParamter, Quality quality);

    void onColorEffectChange(CameraParamter cameraParamter, ColorEffect colorEffect);

    void onSceneModeChange(CameraParamter cameraParamter, SceneMode sceneMode);

    void onWhiteBalance(CameraParamter cameraParamter, WhiteBalance whiteBalance);

    void onAntiBindingChange(CameraParamter cameraParamter, String antiBinding);

    void onVideoQualityChange(CameraParamter cameraParamter, Quality quality);
}

在需要回调的地方实现接口，回调方法





@Override
    public void onFaceDetectChange(CameraParamter cameraParamter, boolean isOpen) {
        if (isOpen) {
            mCamera.startFaceDetection();
        } else {
            mCamera.stopFaceDetection();
        }
        mCameraParamter = cameraParamter;
        mCamera.setParameters(mCameraParamter.getParameters());
    }

    @Override
    public void onFocusModeChange(CameraParamter cameraParamter, FocusMode focusMode) {
        mCameraParamter = cameraParamter;
        mCamera.setParameters(mCameraParamter.getParameters());
    }

    @Override
    public void onPreviewRatioChange(CameraParamter cameraParamter, Ratio ratio) {
        mCameraParamter = cameraParamter;
        mCamera.setParameters(mCameraParamter.getParameters());
        matchSurfaceView(ratio);
    }

    public void matchSurfaceView(Ratio ratio) {
        int screenWidth = App.getApp().getScreenWidth();
        int screenHeight = App.getApp().getScreenHeight();
        int viewHeight = 0;
        switch (ratio) {
            case R_4x3:
                viewHeight = (int) ((screenWidth * 1.0f) / 3 * 4);
                break;
            case R_16x9:
                viewHeight = (int) ((screenWidth * 1.0f) / 9 * 16);
                break;
        }
        int marginTop = (screenHeight - viewHeight) / 2;
        RelativeLayout.LayoutParams layoutParams = new RelativeLayout.LayoutParams(screenWidth, viewHeight);
        layoutParams.topMargin = marginTop;
        surfaceView.setLayoutParams(layoutParams);
    }

    @Override
    public void onPictureRatioChange(CameraParamter cameraParamter, Ratio ratio) {
        mCameraParamter = cameraParamter;
        mCamera.setParameters(mCameraParamter.getParameters());
    }

    @Override
    public void onPictureQualityChange(CameraParamter cameraParamter, Quality quality) {
        mCameraParamter = cameraParamter;
        mCamera.setParameters(mCameraParamter.getParameters());
    }

    @Override
    public void onColorEffectChange(CameraParamter cameraParamter, ColorEffect colorEffect) {
        mCameraParamter = cameraParamter;
        mCamera.setParameters(mCameraParamter.getParameters());
    }

    @Override
    public void onSceneModeChange(CameraParamter cameraParamter, SceneMode sceneMode) {
        mCameraParamter = cameraParamter;
        mCamera.setParameters(mCameraParamter.getParameters());
    }

    @Override
    public void onWhiteBalance(CameraParamter cameraParamter, WhiteBalance whiteBalance) {
        mCameraParamter = cameraParamter;
        mCamera.setParameters(mCameraParamter.getParameters());
    }

    @Override
    public void onAntiBindingChange(CameraParamter cameraParamter, String antiBinding) {
        mCameraParamter = cameraParamter;
        mCamera.setParameters(mCameraParamter.getParameters());
    }

    @Override
    public void onVideoQualityChange(CameraParamter cameraParamter, Quality quality) {
        mCameraParamter = cameraParamter;
        mCamera.setParameters(mCameraParamter.getParameters());
    }



最后




如果觉得好的话，请给该项目start，谢谢！！




这个只是第一弹，Android 的 Camera参数还有好多，通过调用paramter.fattern( )，方法可以获得相机支持的参数设置，结果为一个超长字符串


拼接格式为 key=value;key=value=key=value，


当value有多个的时候中间用 , 分割


附上调用处理之后的结果, 部分参数注明了意思，方便查阅






zoom=0

zoom-supported=true

zoom-ratios=100,114,132,151,174,200,229,263,303,348,400

smooth-zoom-supported=true

max-zoom=10





------------------------------------------------------------------------------------





磨皮等级设置，最高为4级

fb-smooth-level=0

fb-smooth-level-min=-4

fb-smooth-level-max=4





------------------------------------------------------------------------------------





硬件支持的最多可以检测人脸张数 15张

max-num-detected-faces-hw=15

软件检测到的人脸张数，0表示未检测到

max-num-detected-faces-sw=0





------------------------------------------------------------------------------------





拍照模式

cap-mode=normal

cap-mode-values=normal,face_beauty,continuousshot,smileshot,bestshot,evbracketshot,autorama





------------------------------------------------------------------------------------





AF辅助灯(AFAssistLamp)功能:自动对焦辅助灯,负责在光线不足的环境下,为照相机的对焦系统照明被摄物体,使对焦系统能准确对焦AF辅助灯

aflamp-mode=off

aflamp-mode-values=off,on,auto





------------------------------------------------------------------------------------





白平衡参数

auto-whitebalance-lock-supported=true

whitebalance-values=auto,incandescent,fluorescent,warm-fluorescent,daylight,cloudy-daylight,twilight,shade

whitebalance=auto





------------------------------------------------------------------------------------





afeng-max-focus-step=0

afeng-min-focus-step=0





------------------------------------------------------------------------------------





preview-format=yuv420sp

preview-format-values=yuv420sp,yuv420p,yuv420i-yyuvyy-3plane





------------------------------------------------------------------------------------





preview-fps-range=5000,60000

preview-fps-range-values=(5000,60000)





------------------------------------------------------------------------------------





preview-size=640x480

preferred-preview-size-for-video=1920x1080

preview-size-values=176x144,320x240,352x288,480x320,480x368,640x480,720x480,800x480,800x600,864x480,960x540,1280x720,1920x1080





------------------------------------------------------------------------------------





preview-frame-rate=30

preview-frame-rate-values=15,24,30





------------------------------------------------------------------------------------





rotation=0





------------------------------------------------------------------------------------





jpeg-thumbnail-quality=100

jpeg-thumbnail-width=160

jpeg-thumbnail-height=128

jpeg-thumbnail-size-values=0x0,160x128,320x240





------------------------------------------------------------------------------------





感光度,ISO的数值越大，对光的敏感程度越高 , 要说明的是，ISO越高，虽然对微弱光线的敏感程度增加，但同时也要使拍摄的照片的噪声点大大地增加

iso-speed=auto

iso-speed-values=auto,100,200,400,800,1600





------------------------------------------------------------------------------------





flash-mode=off

flash-mode-values=off,on,auto,red-eye,torch





------------------------------------------------------------------------------------





eng-flash-duty-value=-1

eng-flash-duty-min=0

eng-flash-duty-max=1





------------------------------------------------------------------------------------





eng-flash-step-max=0

eng-flash-step-min=0





------------------------------------------------------------------------------------





hue=middle

hue-values=low,middle,high





------------------------------------------------------------------------------------





cshot-indicator=true

cshot-indicator-supported=true





------------------------------------------------------------------------------------





video-stabilization-supported=true

video-stabilization=false





------------------------------------------------------------------------------------





video-snapshot-supported=true

video-size=640x480

video-size-values=176x144,480x320,640x480,864x480,1280x720,1920x1080

video-frame-format=yuv420p





------------------------------------------------------------------------------------





scene-mode=auto

scene-mode-values=auto,portrait,landscape,night,night-portrait,theatre,beach,snow,sunset,steadyphoto,fireworks,sports,party,candlelight,hdr





------------------------------------------------------------------------------------





//当前支持的对比度设置

contrast=middle

contrast-values=low,middle,high





------------------------------------------------------------------------------------





曝光补偿

max-exposure-compensation=3

min-exposure-compensation=-3

曝光补偿步径值

exposure-compensation-step=1.0

exposure-compensation=0

auto-exposure-lock-supported=true





------------------------------------------------------------------------------------





防牛顿环频率设置

antibanding=off

antibanding-values=off,50hz,60hz,auto





------------------------------------------------------------------------------------





eng-focus-fullscan-frame-interval=0

eng-focus-fullscan-frame-interval-max=65535

eng-focus-fullscan-frame-interval-min=0





------------------------------------------------------------------------------------





focus-distances=0.95,1.9,Infinity

max-num-focus-areas=1





------------------------------------------------------------------------------------





focus-mode=auto

focus-mode-values=auto,macro,infinity,continuous-picture,continuous-video,manual,fullscan





------------------------------------------------------------------------------------





vertical-view-angle=49

horizontal-view-angle=61





------------------------------------------------------------------------------------





人脸美化皮肤颜色设置值

fb-skin-color=0

fb-skin-color-max=4

fb-skin-color-min=-4





------------------------------------------------------------------------------------





拍照亮度设置

brightness_value=0

brightness=middle

brightness-values=low,middle,high





------------------------------------------------------------------------------------





饱和度

saturation=middle

saturation-values=low,middle,high





------------------------------------------------------------------------------------





edge=middle

edge-values=low,middle,high





------------------------------------------------------------------------------------





picture-format=jpeg

picture-format-values=jpeg





------------------------------------------------------------------------------------





picture-size=2560x1920

picture-size-values=320x240,640x480,1024x768,1280x720,1280x768,1280x960,1600x1200,2048x1536,2560x1440,2560x1920,3264x2448,3328x1872,2880x1728,3600x2160,4096x3072,4160x3120





------------------------------------------------------------------------------------





eng-shading-table=0

eng-save-shading-table=0





------------------------------------------------------------------------------------





fb-sharp=0

fb-sharp-max=4

fb-sharp-min=-4





------------------------------------------------------------------------------------





滤镜

effect=none

effect-values=none,mono,negative,sepia,aqua,whiteboard,blackboard





------------------------------------------------------------------------------------





零秒快拍模式是否有开启

zsd-mode=off

zsd-mode-values=off,on





------------------------------------------------------------------------------------





jpeg-quality=100





------------------------------------------------------------------------------------





当前拍摄张数

burst-num=1





------------------------------------------------------------------------------------





镜头焦距

focal-length=3.5





------------------------------------------------------------------------------------





当前平台支持的最大测光区域为9块

max-num-metering-areas=9





------------------------------------------------------------------------------------





传感器类型

sensor-type=252





------------------------------------------------------------------------------------





capfname=/sdcard/DCIM/cap00





------------------------------------------------------------------------------------





max-num-ot=1





------------------------------------------------------------------------------------





相机模式设置

mtk-cam-mode=0




                

        

    

    
  



    



            

  



          




        



    





    



      

      

        
      

      





	

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