预览摄像头画面-解决小问题

GCamera

package com.example.glivepush.camera;

import android.content.Context;
import android.graphics.ImageFormat;
import android.graphics.SurfaceTexture;
import android.hardware.Camera;

import com.example.glivepush.util.DisplayUtil;

import java.io.IOException;
import java.util.List;

public class GCamera {

    private Camera camera;

    /***********************************    解决拉伸问题-START    *****************************/
    private int width;
    private int height;

    public GCamera(Context context) {
        this.width = DisplayUtil.getScreenWidth(context);
        this.height = DisplayUtil.getScreenHeight(context);
    }
    /***********************************    解决拉伸问题-END    *****************************/
    private SurfaceTexture surfaceTexture;

    public void initCamera(SurfaceTexture surfaceTexture,int cameraId){
        this.surfaceTexture = surfaceTexture;
        setCameraParm(cameraId);
    }

    //预览
    private void setCameraParm(int cameraId){
        try {
            camera = Camera.open(cameraId);
            camera.setPreviewTexture(surfaceTexture);
            Camera.Parameters parameters = camera.getParameters();

            parameters.setFlashMode("off");
            parameters.setPictureFormat(ImageFormat.NV21);

            /***********************************    解决拉伸问题-START    *****************************/
            Camera.Size size = getFitSize(parameters.getSupportedPictureSizes());
            parameters.setPictureSize(size.width, size.height);

            //预览大小
            size = getFitSize(parameters.getSupportedPreviewSizes());
            parameters.setPreviewSize(size.width, size.height);
            /***********************************    解决拉伸问题-END    *****************************/

            camera.setParameters(parameters);

            camera.startPreview();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    public void stopPreview(){
        if(camera != null){
            camera.startPreview();
            camera.release();
            camera = null;
        }
    }

    public void changeCamera(int cameraId){
        if(camera != null){
            stopPreview();
        }
        setCameraParm(cameraId);
    }

    /***********************************    解决拉伸问题-START    *****************************/
    private Camera.Size getFitSize(List<Camera.Size> sizes) {
        if(width < height) {
            int t = height;
            height = width;
            width = t;
        }
        for(Camera.Size size : sizes) {
            if(1.0f * size.width / size.height == 1.0f * width / height) {
                return size;
            }
        }
        return sizes.get(0);
    }
    /***********************************    解决拉伸问题-END    *****************************/
}

GCameraRender

package com.example.glivepush.camera;

import android.content.Context;
import android.graphics.SurfaceTexture;
import android.opengl.GLES11Ext;
import android.opengl.GLES20;
import android.opengl.Matrix;
import android.util.Log;

import com.example.glivepush.R;
import com.example.glivepush.egl.GEGLSurfaceView;
import com.example.glivepush.egl.GShaderUtil;
import com.example.glivepush.util.DisplayUtil;

import java.nio.ByteBuffer;
import java.nio.ByteOrder;
import java.nio.FloatBuffer;

public class GCameraRender implements GEGLSurfaceView.GGLRender , SurfaceTexture.OnFrameAvailableListener {

    private Context context;

    private FloatBuffer vertexBuffer;
    private FloatBuffer fragmentBuffer;

    private int program;

    private int vPosition;
    private int fPosition;

    private int vboId;
    private int fboId;

    private int fboTextureid;
    private int cameraTextureid;

    /***********************************    解决横屏问题-START    *********************************/
    private int screenWidth;
    private int screenHeight;

    private int width;
    private int height;
    /***********************************    解决横屏问题-END    *********************************/

    private GCameraFboRender gCameraFboRender;

    private SurfaceTexture surfaceTexture;
    private OnSurfaceCreateListener onSurfaceCreateListener;

    public void setOnSurfaceCreateListener(OnSurfaceCreateListener onSurfaceCreateListener) {
        this.onSurfaceCreateListener = onSurfaceCreateListener;
    }

    /***********************************    矩阵旋转-START    *************************************/
    private int umatrix;
    private float[] matrix = new float[16];
    /***********************************    矩阵旋转-END    ***************************************/


    private final float[] vertexData = {
            -1f, -1f,
            1f, -1f,
            -1f, 1f,
            1f, 1f
    };

    private final float[] fragmentData = {
            0f, 1f,
            1f, 1f,
            0f, 0f,
            1f, 0f
    };

    public GCameraRender(Context context) {
        this.context = context;

        /***********************************    解决横屏问题-START    *********************************/
        this.screenWidth = DisplayUtil.getScreenWidth(context);
        this.screenHeight = DisplayUtil.getScreenHeight(context);

        /***********************************    解决横屏问题-END    *********************************/

        gCameraFboRender = new GCameraFboRender(context);

        vertexBuffer = ByteBuffer.allocateDirect(vertexData.length * 4)
                .order(ByteOrder.nativeOrder())
                .asFloatBuffer()
                .put(vertexData);
        vertexBuffer.position(0);

        fragmentBuffer = ByteBuffer.allocateDirect(fragmentData.length * 4)
                .order(ByteOrder.nativeOrder())
                .asFloatBuffer()
                .put(fragmentData);
        fragmentBuffer.position(0);

        /***********************************    矩阵旋转-START    *********************************/
        //初始化矩阵

        /***********************************    矩阵旋转-END   ************************************/
    }

    @Override
    public void onSurfaceCreated() {

        gCameraFboRender.onCreate();

        //获取着色器属性
        String vertexSource = GShaderUtil.getRawResource(context, R.raw.vertex_shader);
        String fragmentSource = GShaderUtil.getRawResource(context, R.raw.fragment_shader);
        program = GShaderUtil.createProgram(vertexSource, fragmentSource);
        //顶点坐标
        vPosition = GLES20.glGetAttribLocation(program, "v_Position");
        //纹理坐标
        fPosition = GLES20.glGetAttribLocation(program, "f_Position");

        /***********************************    矩阵旋转-START    *************************************/
        //加载矩阵
        umatrix =  GLES20.glGetUniformLocation(program,"u_Matrix");
        /***********************************    矩阵旋转-START    *************************************/

        int [] vbos = new int[1];
        GLES20.glGenBuffers(1, vbos, 0);
        vboId = vbos[0];
        //绑定
        GLES20.glBindBuffer(GLES20.GL_ARRAY_BUFFER, vboId);
        //分配内存
        GLES20.glBufferData(GLES20.GL_ARRAY_BUFFER, vertexData.length*4 + fragmentData.length*4,
                null,GLES20. GL_STATIC_DRAW);
        //缓存到显存
        GLES20.glBufferSubData(GLES20.GL_ARRAY_BUFFER, 0, vertexData.length * 4, vertexBuffer);
        GLES20.glBufferSubData(GLES20.GL_ARRAY_BUFFER, vertexData.length * 4, fragmentData.length * 4,
                fragmentBuffer);
        //解绑
        GLES20.glBindBuffer(GLES20.GL_ARRAY_BUFFER, 0);

        //fbo
        int [] fbos = new int[1];
        GLES20.glGenBuffers(1, fbos, 0);
        fboId = fbos[0];
        //绑定
        GLES20.glBindFramebuffer(GLES20.GL_FRAMEBUFFER, fboId);

        //生成纹理
        int[] textureIds = new int[1];
        GLES20.glGenTextures(1, textureIds, 0);
        fboTextureid = textureIds[0];
        //绑定
        GLES20.glBindTexture(GLES20.GL_TEXTURE_2D, fboTextureid);

        //设置环绕过滤方法
        GLES20.glTexParameteri(GLES20.GL_TEXTURE_2D, GLES20.GL_TEXTURE_WRAP_S, GLES20.GL_REPEAT);
        GLES20.glTexParameteri(GLES20.GL_TEXTURE_2D, GLES20.GL_TEXTURE_WRAP_T, GLES20.GL_REPEAT);

        GLES20.glTexParameteri(GLES20.GL_TEXTURE_2D, GLES20.GL_TEXTURE_MIN_FILTER, GLES20.GL_LINEAR);
        GLES20.glTexParameteri(GLES20.GL_TEXTURE_2D, GLES20.GL_TEXTURE_MAG_FILTER, GLES20.GL_LINEAR);

        /***********************************    解决横屏问题-START    *********************************/
        //设置FBO分配内存大小
        GLES20.glTexImage2D(GLES20.GL_TEXTURE_2D, 0, GLES20.GL_RGBA, screenWidth, screenHeight, 0,
                GLES20.GL_RGBA, GLES20.GL_UNSIGNED_BYTE, null);
        /***********************************    解决横屏问题-END   *********************************/

        //把纹理绑定到FBO
        GLES20.glFramebufferTexture2D(GLES20.GL_FRAMEBUFFER, GLES20.GL_COLOR_ATTACHMENT0,
                GLES20.GL_TEXTURE_2D, fboTextureid, 0);
        //检查FBO绑定是否成功
        if(GLES20.glCheckFramebufferStatus(GLES20.GL_FRAMEBUFFER) != GLES20.GL_FRAMEBUFFER_COMPLETE){
            Log.e("godv", "fbo error");
        }else {
            Log.e("godv", "fbo success");
        }

        //解绑纹理
        GLES20.glBindTexture(GLES20.GL_TEXTURE_2D, 0);
        //解绑
        GLES20.glBindFramebuffer(GLES20.GL_FRAMEBUFFER, 0);

        //生成摄像头纹理
        int[] textureIdsoes = new int[1];
        GLES20.glGenTextures(1, textureIdsoes, 0);
        cameraTextureid = textureIdsoes[0];
        //绑定扩展纹理
        GLES20.glBindTexture(GLES11Ext.GL_TEXTURE_EXTERNAL_OES, cameraTextureid);

        GLES20.glTexParameteri(GLES11Ext.GL_TEXTURE_EXTERNAL_OES, GLES20.GL_TEXTURE_WRAP_S, GLES20.GL_REPEAT);
        GLES20.glTexParameteri(GLES11Ext.GL_TEXTURE_EXTERNAL_OES, GLES20.GL_TEXTURE_WRAP_T, GLES20.GL_REPEAT);

        GLES20.glTexParameteri(GLES11Ext.GL_TEXTURE_EXTERNAL_OES, GLES20.GL_TEXTURE_MIN_FILTER, GLES20.GL_LINEAR);
        GLES20.glTexParameteri(GLES11Ext.GL_TEXTURE_EXTERNAL_OES, GLES20.GL_TEXTURE_MAG_FILTER, GLES20.GL_LINEAR);

        //摄像头id
        surfaceTexture = new SurfaceTexture(cameraTextureid);
        //监听
        surfaceTexture.setOnFrameAvailableListener(this);

        if(onSurfaceCreateListener !=null){
            onSurfaceCreateListener.onSurfaceCreate(surfaceTexture);
        }

        //解绑纹理
        GLES20.glBindTexture(GLES11Ext.GL_TEXTURE_EXTERNAL_OES, 0);
    }

    /***********************************    矩阵旋转-START    *************************************/
        //重置矩阵
        public void resetMatrix(){
            Matrix.setIdentityM(matrix, 0);
        }

        //设置角度
        public void setAngle(float angle ,float x, float y,float z){
            Matrix.rotateM(matrix, 0, angle, x, y, z);

        }
    /***********************************    矩阵旋转-END    *************************************/

    @Override
    public void onSurfaceChanged(int width, int height) {
//        gCameraFboRender.onChange(width, height);
//        GLES20.glViewport(0,0,width,height);

        /***********************************    解决横屏问题-START    *****************************/
        this.width = width;
        this.height = height;
        /***********************************    解决横屏问题-END   ********************************/
    }

    @Override
    public void onDrawFrame() {
        surfaceTexture.updateTexImage();

        GLES20.glClear(GLES20.GL_COLOR_BUFFER_BIT);
        GLES20.glClearColor(1f,0f, 0f, 1f);

        GLES20.glUseProgram(program);

        /***********************************    矩阵旋转-START    *********************************/
        //设置屏幕大小
        GLES20.glViewport(0,0,screenWidth,screenHeight);
        //使用
        GLES20.glUniformMatrix4fv(umatrix, 1, false, matrix, 0);
        /***********************************    矩阵旋转-END    ***********************************/

        GLES20.glBindFramebuffer(GLES20.GL_FRAMEBUFFER, fboId);
        GLES20.glBindBuffer(GLES20.GL_ARRAY_BUFFER, vboId);

        GLES20.glEnableVertexAttribArray(vPosition);
        GLES20.glVertexAttribPointer(vPosition, 2, GLES20.GL_FLOAT, false, 8,
                0);

        GLES20.glEnableVertexAttribArray(fPosition);
        GLES20.glVertexAttribPointer(fPosition, 2, GLES20.GL_FLOAT, false, 8,
                vertexData.length * 4);

        GLES20.glDrawArrays(GLES20.GL_TRIANGLE_STRIP, 0, 4);
        GLES20.glBindTexture(GLES20.GL_TEXTURE_2D, 0);
        GLES20.glBindBuffer(GLES20.GL_ARRAY_BUFFER, 0);

        GLES20.glBindFramebuffer(GLES20.GL_FRAMEBUFFER, 0);

        gCameraFboRender.onChange(width, height);
        gCameraFboRender.onDraw(fboTextureid);
    }

    //有数据回调
    @Override
    public void onFrameAvailable(SurfaceTexture surfaceTexture) {

    }

    public interface OnSurfaceCreateListener{

        void onSurfaceCreate(SurfaceTexture surfaceTexture);
    }
}

GCameraView

package com.example.glivepush.camera;

import android.content.Context;
import android.graphics.SurfaceTexture;
import android.hardware.Camera;
import android.util.AttributeSet;
import android.view.Surface;
import android.view.WindowManager;

import com.example.glivepush.egl.GEGLSurfaceView;

public class GCameraView extends GEGLSurfaceView {

    private GCameraRender gCameraRender;
    private GCamera gCamera;

    private int cameraId = Camera.CameraInfo.CAMERA_FACING_BACK;

    public GCameraView(Context context) {
        this(context,null);
    }

    public GCameraView(Context context, AttributeSet attrs) {
        this(context, attrs,0);
    }

    public GCameraView(Context context, AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
        gCameraRender = new GCameraRender(context);
        gCamera = new GCamera(context);
        setRender(gCameraRender);

        /***********************************    旋转角度-START    *************************************/
        //调用获取旋转角度
        previewAngle(context);
        /***********************************    旋转角度-END    *************************************/

        gCameraRender.setOnSurfaceCreateListener(new GCameraRender.OnSurfaceCreateListener() {
            @Override
            public void onSurfaceCreate(SurfaceTexture surfaceTexture) {
                gCamera.initCamera(surfaceTexture, cameraId);
            }
        });
    }

    public void onDestory(){
        if(gCamera != null){
            gCamera.stopPreview();
        }
    }

    /***********************************    旋转角度-START    *************************************/
    public void previewAngle(Context context){
//        获取activity旋转角度
        int angle = ((WindowManager)context.getSystemService(Context.WINDOW_SERVICE))
                .getDefaultDisplay().getRotation();
        gCameraRender.resetMatrix();
        switch (angle){
            case Surface.ROTATION_0:
                if(cameraId == Camera.CameraInfo.CAMERA_FACING_BACK) {
                    gCameraRender.setAngle(90, 0, 0, 1);
                    gCameraRender.setAngle(180, 1, 0, 0);
                } else {
                    gCameraRender.setAngle(90f, 0f, 0f, 1f);
                }

                break;
            case Surface.ROTATION_90:
                if(cameraId == Camera.CameraInfo.CAMERA_FACING_BACK) {
                    gCameraRender.setAngle(180, 0, 0, 1);
                    gCameraRender.setAngle(180, 0, 1, 0);
                } else {
                    gCameraRender.setAngle(90f, 0f, 0f, 1f);
                }
                break;
            case Surface.ROTATION_180:
                if(cameraId == Camera.CameraInfo.CAMERA_FACING_BACK)
                {
                    gCameraRender.setAngle(90f, 0.0f, 0f, 1f);
                    gCameraRender.setAngle(180f, 0.0f, 1f, 0f);
                } else {
                    gCameraRender.setAngle(-90, 0f, 0f, 1f);
                }
                break;
            case Surface.ROTATION_270:
                if(cameraId == Camera.CameraInfo.CAMERA_FACING_BACK) {
                    gCameraRender.setAngle(180f, 0.0f, 1f, 0f);
                } else {
                    gCameraRender.setAngle(0f, 0f, 0f, 1f);
                }

                break;
        }
    }
    /***********************************    旋转角度-END    *************************************/
}

CameraActivity

package com.example.glivepush;

import android.content.res.Configuration;
import android.os.Bundle;

import androidx.annotation.Nullable;
import androidx.appcompat.app.AppCompatActivity;

import com.example.glivepush.camera.GCameraView;

public class CameraActivity extends AppCompatActivity {

    private GCameraView gCameraView;
    @Override
    protected void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_camera);
        gCameraView = findViewById(R.id.cameraView);
    }

    @Override
    protected void onDestroy() {
        super.onDestroy();
        gCameraView.onDestory();
    }

    /***********************************    解决横屏问题-START    *****************************/
    @Override
    public void onConfigurationChanged(Configuration newConfig) {
        super.onConfigurationChanged(newConfig);
        gCameraView.previewAngle(this);
    }
    /***********************************    解决横屏问题-END   *****************************/
}

 

本文地址：https://blog.csdn.net/we1less/article/details/110294899