android 前摄镜像的源码修改

最近遇到一个客户需求，要求在前摄的时候，不要求镜像预览，拍出来的照片也不要求镜像。

科谱一下，前摄镜像的原因是让镜头对着自己，当镜子使用，是专门这么设计的。

既然客户有要求，那就得修改了。

通过各种渠道找，之前想通过驱动层修改代码， 但是驱动同事告诉我，预览可以修改，拍出来的照片修改不了。

拍出来 的照片只能是在应用层修改，那就只能在AP侧找源码。

此代码是基于高通的基础之上的，android 7.1平台。

packages\apps\SnapdragonCamera\src\com\android\camera\PhotoModule.java

private void setFlipValue() {
        // Read Flip mode from adb command
        //value: 0(default) - FLIP_MODE_OFF
        //value: 1 - FLIP_MODE_H
        //value: 2 - FLIP_MODE_V
        //value: 3 - FLIP_MODE_VH
        int preview_flip_value = SystemProperties.getInt("debug.camera.preview.flip", 0);
        int video_flip_value = SystemProperties.getInt("debug.camera.video.flip", 0);
        int picture_flip_value = SystemProperties.getInt("debug.camera.picture.flip", 0);
        int rotation = CameraUtil.getJpegRotation(mCameraId, mOrientation);
        mParameters.setRotation(rotation);
        if (rotation == 90 || rotation == 270) {
            // in case of 90 or 270 degree, V/H flip should reverse
            if (preview_flip_value == 1) {
                preview_flip_value = 2;
            } else if (preview_flip_value == 2) {
                preview_flip_value = 1;
            }
            if (video_flip_value == 1) {
                video_flip_value = 2;
            } else if (video_flip_value == 2) {
                video_flip_value = 1;
            }
            if (picture_flip_value == 1) {
                picture_flip_value = 2;
            } else if (picture_flip_value == 2) {
                picture_flip_value = 1;
            }
        }
        String preview_flip = CameraUtil.getFilpModeString(preview_flip_value);
        String video_flip = CameraUtil.getFilpModeString(video_flip_value);
        String picture_flip = CameraUtil.getFilpModeString(picture_flip_value);
        if(CameraUtil.isSupported(preview_flip, CameraSettings.getSupportedFlipMode(mParameters))){
            mParameters.set(CameraSettings.KEY_QC_PREVIEW_FLIP, preview_flip);
        }
        if(CameraUtil.isSupported(video_flip, CameraSettings.getSupportedFlipMode(mParameters))){
            mParameters.set(CameraSettings.KEY_QC_VIDEO_FLIP, video_flip);
        }
        if(CameraUtil.isSupported(picture_flip, CameraSettings.getSupportedFlipMode(mParameters))){
            mParameters.set(CameraSettings.KEY_QC_SNAPSHOT_PICTURE_FLIP, picture_flip);
        }
    }

找到这个函数，

添加log,

private void setFlipValue() {
        // Read Flip mode from adb command
        //value: 0(default) - FLIP_MODE_OFF
        //value: 1 - FLIP_MODE_H
        //value: 2 - FLIP_MODE_V
        //value: 3 - FLIP_MODE_VH
        int preview_flip_value = SystemProperties.getInt("debug.camera.preview.flip", 0);
        int video_flip_value = SystemProperties.getInt("debug.camera.video.flip", 0);
        int picture_flip_value = SystemProperties.getInt("debug.camera.picture.flip", 0);
        int rotation = CameraUtil.getJpegRotation(mCameraId, mOrientation);
		Log.d("leo","preview_flip_value-->"+preview_flip_value);
		Log.d("leo","video_flip_value-->"+video_flip_value);
		Log.d("leo","picture_flip_value-->"+picture_flip_value);
		Log.d("leo","rotation-->"+rotation);
		Log.d("leo","mCameraId-->"+mCameraId);
		Log.d("leo","mOrientation-->"+mOrientation);
        mParameters.setRotation(rotation);
        if (rotation == 90 || rotation == 270) {
            // in case of 90 or 270 degree, V/H flip should reverse
            if (preview_flip_value == 1) {
                preview_flip_value = 2;
            } else if (preview_flip_value == 2) {
                preview_flip_value = 1;
            }
            if (video_flip_value == 1) {
                video_flip_value = 2;
            } else if (video_flip_value == 2) {
                video_flip_value = 1;
            }
            if (picture_flip_value == 1) {
                picture_flip_value = 2;
            } else if (picture_flip_value == 2) {
                picture_flip_value = 1;
            }
        }
        String preview_flip = CameraUtil.getFilpModeString(preview_flip_value);
        String video_flip = CameraUtil.getFilpModeString(video_flip_value);
        String picture_flip = CameraUtil.getFilpModeString(picture_flip_value);
		Log.d("leo","preview_flip-->"+preview_flip);
		Log.d("leo","video_flip-->"+video_flip);
		Log.d("leo","picture_flip-->"+picture_flip);
        if(CameraUtil.isSupported(preview_flip, CameraSettings.getSupportedFlipMode(mParameters))){
            mParameters.set(CameraSettings.KEY_QC_PREVIEW_FLIP, preview_flip);
        }
        if(CameraUtil.isSupported(video_flip, CameraSettings.getSupportedFlipMode(mParameters))){
            mParameters.set(CameraSettings.KEY_QC_VIDEO_FLIP, video_flip);
        }
        if(CameraUtil.isSupported(picture_flip, CameraSettings.getSupportedFlipMode(mParameters))){
            mParameters.set(CameraSettings.KEY_QC_SNAPSHOT_PICTURE_FLIP, picture_flip);
        }
    }

在代码的这个地方，

mParameters.set

设置相机的属性时，会有一个flip属性，这个属性就可以设置拍出来的照片是否镜像，v方向还是h方向镜像。
如果需要修改，可以参考以下：

private void setFlipValue() {
        // Read Flip mode from adb command
        //value: 0(default) - FLIP_MODE_OFF
        //value: 1 - FLIP_MODE_H
        //value: 2 - FLIP_MODE_V
        //value: 3 - FLIP_MODE_VH
        int preview_flip_value = SystemProperties.getInt("debug.camera.preview.flip", 0);
        int video_flip_value = SystemProperties.getInt("debug.camera.video.flip", 0);
        int picture_flip_value = SystemProperties.getInt("debug.camera.picture.flip", 0);
        int rotation = CameraUtil.getJpegRotation(mCameraId, mOrientation);
		Log.d("leo","preview_flip_value-->"+preview_flip_value);
		Log.d("leo","video_flip_value-->"+video_flip_value);
		Log.d("leo","picture_flip_value-->"+picture_flip_value);
		Log.d("leo","rotation-->"+rotation);
		Log.d("leo","mCameraId-->"+mCameraId);
		Log.d("leo","mOrientation-->"+mOrientation);
                // 在这个地方添加对cameraiId的判断，也就是你想镜像哪一个camera，就判断一个id就可以了，
               // 对filp的修改也是根据你的需要来修改的，我这里只需要修改拍照后的镜像，那就修改picture_flip_value
               if(2 == mCameraId){
			picture_flip_value = 2;
		}
        mParameters.setRotation(rotation);
        if (rotation == 90 || rotation == 270) {
            // in case of 90 or 270 degree, V/H flip should reverse
            if (preview_flip_value == 1) {
                preview_flip_value = 2;
            } else if (preview_flip_value == 2) {
                preview_flip_value = 1;
            }
            if (video_flip_value == 1) {
                video_flip_value = 2;
            } else if (video_flip_value == 2) {
                video_flip_value = 1;
            }
            if (picture_flip_value == 1) {
                picture_flip_value = 2;
            } else if (picture_flip_value == 2) {
                picture_flip_value = 1;
            }
        }
        String preview_flip = CameraUtil.getFilpModeString(preview_flip_value);
        String video_flip = CameraUtil.getFilpModeString(video_flip_value);
        String picture_flip = CameraUtil.getFilpModeString(picture_flip_value);
		Log.d("leo","preview_flip-->"+preview_flip);
		Log.d("leo","video_flip-->"+video_flip);
		Log.d("leo","picture_flip-->"+picture_flip);
        if(CameraUtil.isSupported(preview_flip, CameraSettings.getSupportedFlipMode(mParameters))){
            mParameters.set(CameraSettings.KEY_QC_PREVIEW_FLIP, preview_flip);
        }
        if(CameraUtil.isSupported(video_flip, CameraSettings.getSupportedFlipMode(mParameters))){
            mParameters.set(CameraSettings.KEY_QC_VIDEO_FLIP, video_flip);
        }
        if(CameraUtil.isSupported(picture_flip, CameraSettings.getSupportedFlipMode(mParameters))){
            mParameters.set(CameraSettings.KEY_QC_SNAPSHOT_PICTURE_FLIP, picture_flip);
        }
    }

亲测有效哦，实际拍出来的效果我就不上图了，请gongchengshi们自己动手试试吧。