android openGL 预览camera/camear2

//权限请求和切换摄像头class CameraActivity : Activity() {    private var surface: CodecSurface? = null    private var btn: Button? = null    override fun onCreate(savedInstanceState: Bundle?) {        super.onCreate(savedInstanceState)        window.addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON)        if (ActivityCompat.checkSelfPermission(                this,                Manifest.permission.CAMERA            ) == PackageManager.PERMISSION_GRANTED        ) {            initView()        } else {            ActivityCompat.requestPermissions(                this, arrayOf(                    Manifest.permission.CAMERA,                    Manifest.permission.RECORD_AUDIO,                    Manifest.permission.READ_EXTERNAL_STORAGE,                    Manifest.permission.WRITE_EXTERNAL_STORAGE                ), 0            )        }    }    override fun onRequestPermissionsResult(        requestCode: Int,        permissions: Array,        grantResults: IntArray    ) {        super.onRequestPermissionsResult(requestCode, permissions, grantResults)        initView()    }    private var curCameraId: Int = 0    private fun initView() {        setContentView(R.layout.activity_codec)        btn = findViewById

//界面刷新和设置渲染模式public class CodecSurface constructor(context: Context, att: AttributeSet?) :    GLSurfaceView(context, att),SurfaceTexture.OnFrameAvailableListener{    constructor(context: Context) : this(context, null)    private var renderer: CodecRender? = null    init {        setEGLContextClientVersion(2)        renderer = CodecRender(this)        renderer!!.setFrameListener(this)        renderer        preserveEGLContextOnPause=true        setRenderer(renderer)        renderMode = RENDERMODE_WHEN_DIRTY    }    public fun changeCameraId(id: Int) {        renderer!!.setCameraId(id)    }    public fun release() {        renderer!!.release()    }    override fun onFrameAvailable(surfaceTexture: SurfaceTexture?) {        requestRender()    }}

//camera的选用和绘画操作class CodecRender(val surface: CodecSurface) : GLSurfaceView.Renderer {    private val TAG: String = "CodecRender"    var textureId: Int = 0;    private var filter: OesFilter? = null    var surfaceTexture: SurfaceTexture? = null    private var cameraId: Int = 0;    private var listener: SurfaceTexture.OnFrameAvailableListener? = null    init {        filter = OesFilter()    }    override fun onDrawFrame(gl: GL10?) {        GLES20.glClearColor(0.0f, 0.0f, 0.0f, 0.0f)        GLES20.glClear(GLES20.GL_COLOR_BUFFER_BIT or GLES20.GL_DEPTH_BUFFER_BIT)        surfaceTexture!!.updateTexImage()        if (cameraUtil!!.isOpenFinish) {            filter!!.drawFrame()        }    }    override fun onSurfaceChanged(gl: GL10?, width: Int, height: Int) {        GLES20.glViewport(0, 0, width, height);    }    override fun onSurfaceCreated(gl: GL10?, config: EGLConfig?) {        textureId = filter!!.createTextureId()        surfaceTexture = SurfaceTexture(textureId)        surfaceTexture!!.setOnFrameAvailableListener {            surface!!.requestRender()        }        cameraUtil!!.setTexture(surfaceTexture!!)        setCameraId(cameraId);        filter!!.setTextureId(textureId)        filter!!.create(cameraId)    }    public fun setCameraId(id: Int) {        cameraId = id;        filter!!.setCoodData(cameraId)        cameraUtil!!.open(cameraId.toString())    }    private var cameraUtil: CameraUtil? = null    public fun release() {        surfaceTexture!!.setOnFrameAvailableListener(null)        surfaceTexture!!.release()        surfaceTexture = null        cameraUtil!!.close()    }    public fun setFrameListener(listener: SurfaceTexture.OnFrameAvailableListener) {        this.listener = listener;    }    init {        cameraUtil = CameraUtil(surface.context)    }}

//低版本cameraclass CameraUtil(val context: Context) : CameraState {    private val TAG: String = "CameraUtil"    private var textureView: SurfaceTexture? = null    private var myCamera: Camera? = null    private var holder: SurfaceHolder? = null    private var isOpenSuccess = true    public fun setTexture(view: SurfaceTexture) {        textureView = view;    }    public fun setDiaPlay(holder: SurfaceHolder) {        this.holder = holder    }    public fun open(cameraId: String) {        try {            isOpenSuccess = false            close()            myCamera = Camera.open(cameraId.toInt())            val mParameters = myCamera!!.getParameters();            //设置将保存的图片旋转90°（竖着拍摄的时候）            var PreviewWidth = 0            var PreviewHeight = 0            val wm = context.getSystemService(Context.WINDOW_SERVICE) as WindowManager;//获取窗口的管理器            val display = wm.defaultDisplay;//获得窗口里面的屏幕            val parameters  = myCamera!!.getParameters();            // 选择合适的预览尺寸            val sizeList = mParameters.getSupportedPreviewSizes();            if (sizeList.size > 1) {                val itor= sizeList.iterator();                while (itor.hasNext()) {                    val cur = itor.next();                    if (cur.width >= PreviewWidth                        && cur.height >= PreviewHeight) {                        PreviewWidth = cur.width;                        PreviewHeight = cur.height;                        break;                    }                }            }            LogUtil.e("-->width=$PreviewWidth height=$PreviewHeight")            mParameters.setPreviewSize(PreviewWidth, PreviewHeight); //获得摄像区域的大小            mParameters.set("jpeg-quality", 85);//设置照片质量            mParameters.setRotation(90);            myCamera!!.setParameters(mParameters)//如果出现异常则为参数问题，逐个删减            myCamera!!.setDisplayOrientation(90)            myCamera!!.setPreviewTexture(textureView)            myCamera!!.setPreviewCallback(object : Camera.PreviewCallback {                override fun onPreviewFrame(data: ByteArray?, camera: Camera?) {                    try {                        isOpenSuccess = true                        camera!!.addCallbackBuffer(data)                    } catch (e: Exception) {                        e.printStackTrace()                    }                }            })            myCamera!!.startPreview()        } catch (e: Exception) {            e.printStackTrace()        }    }    public fun close() {        myCamera?.setPreviewCallback(null)        myCamera?.stopPreview()        myCamera?.release()        myCamera = null    }    override fun isOpenFinish(): Boolean {        return isOpenSuccess    }}

//5.0以上的camearclass Camera2Util constructor(private val context: Context) : CameraState {    private val TAG: String = "CameraUtil"    private var cameraDevice: CameraDevice? = null    private var cameraManager: CameraManager? = null    private var cameraBuild: CaptureRequest.Builder? = null    private var isOpenSuccess = true    private var stateCallback: CameraDevice.StateCallback = object : CameraDevice.StateCallback() {        override fun onOpened(camera: CameraDevice) {            cameraDevice = camera            try {                val surface: Surface = Surface(textureView)                cameraBuild = cameraDevice!!.createCaptureRequest(CameraDevice.TEMPLATE_PREVIEW)                cameraBuild!!.set(                    CaptureRequest.CONTROL_AE_MODE,                    CaptureRequest.CONTROL_AE_MODE_ON_AUTO_FLASH                )                cameraBuild!!.set(                    CaptureRequest.CONTROL_AF_MODE,                    CaptureRequest.CONTROL_AF_MODE_CONTINUOUS_PICTURE                )                cameraBuild!!.addTarget(surface)                cameraDevice!!.createCaptureSession(listOf(surface), sessionCallback, camearHandler)            } catch (e: Exception) {                e.printStackTrace()            }        }        override fun onDisconnected(camera: CameraDevice) {        }        override fun onError(camera: CameraDevice, error: Int) {            LogUtil.e(TAG, "error=$error")        }    }    private var sessionCallback: CameraCaptureSession.StateCallback = object :        CameraCaptureSession.StateCallback() {        override fun onConfigureFailed(session: CameraCaptureSession) {        }        override fun onConfigured(session: CameraCaptureSession) {            isOpenSuccess = true            session.setRepeatingRequest(cameraBuild!!.build(), captureCallback, camearHandler)        }    }    private var captureCallback: CameraCaptureSession.CaptureCallback = object :        CameraCaptureSession.CaptureCallback() {        override fun onCaptureCompleted(            session: CameraCaptureSession,            request: CaptureRequest,            result: TotalCaptureResult        ) {            super.onCaptureCompleted(session, request, result)        }        override fun onCaptureFailed(            session: CameraCaptureSession,            request: CaptureRequest,            failure: CaptureFailure        ) {            super.onCaptureFailed(session, request, failure)        }        override fun onCaptureProgressed(            session: CameraCaptureSession,            request: CaptureRequest,            partialResult: CaptureResult        ) {            super.onCaptureProgressed(session, request, partialResult)        }    }    private val camearHandler = object : Handler() {        override fun handleMessage(msg: Message) {            super.handleMessage(msg)        }    }    init {        cameraManager = context.getSystemService(Context.CAMERA_SERVICE) as CameraManager    }    public fun open(cameraId: String) {        try {            isOpenSuccess = false            if (ActivityCompat.checkSelfPermission(                    context,                    Manifest.permission.CAMERA                ) == PackageManager.PERMISSION_GRANTED            ) {                cameraDevice?.close()                cameraManager!!.openCamera(cameraId, stateCallback, camearHandler)            }        } catch (e: Exception) {            e.printStackTrace()        }    }    private var textureView: SurfaceTexture? = null;    public fun setTexture(view: SurfaceTexture) {        textureView = view;    }    public fun close() {        cameraDevice!!.close()    }    override fun isOpenFinish(): Boolean {        return isOpenSuccess    }}

//预览摄像头数据，后续与其他滤镜混合class OesFilter {    private val TAG: String = "OesFilter"    private var positionFloat: FloatBuffer? = null    private var coodFloat: FloatBuffer? = null    private var glHPosition: Int = 0    private var glHCoordinate: Int = 0    private var glHTexture: Int = 0    private var mHCoord: Int = 0    private var mHMatrix: Int = 0    private var coordinate: FloatArray? = null    private var textureId: Int = 0    private var programsId: Int = 0    private val vertexPosition = floatArrayOf(        -1.0f, 1.0f,        -1.0f, -1.0f,        1.0f, 1.0f,        1.0f, -1.0f    )    public fun create(cameraId: Int) {        setCoodData(cameraId)        val frag_id = createShader(fragmentShaderCode, GLES20.GL_FRAGMENT_SHADER)        val vertex_id = createShader(vertexShaderCode, GLES20.GL_VERTEX_SHADER)        programsId = GLES20.glCreateProgram();        GLES20.glAttachShader(programsId, frag_id)        GLES20.glAttachShader(programsId, vertex_id)        GLES20.glLinkProgram(programsId)        val linkState = IntArray(1)        GLES20.glGetProgramiv(programsId, GLES20.GL_LINK_STATUS, linkState, 0)        LogUtil.e(TAG, "state=${linkState[0]}   programsId=$programsId")        if (linkState[0] == 0) {            LogUtil.e(                TAG,                "Could not link program: "            )            LogUtil.e(                TAG,                GLES20.glGetProgramInfoLog(programsId)            )            GLES20.glDeleteProgram(programsId)            programsId = 0;        }    }    private fun userProgram(programsId: Int) {        GLES20.glUseProgram(programsId)        var bb: ByteBuffer = ByteBuffer.allocateDirect(vertexPosition.size * 4)        bb.order(ByteOrder.nativeOrder())        positionFloat = bb.asFloatBuffer()        positionFloat!!.put(vertexPosition)        positionFloat!!.position(0)        var cbb: ByteBuffer = ByteBuffer.allocateDirect(coordinate!!.size * 4)        cbb.order(ByteOrder.nativeOrder())        coodFloat = cbb.asFloatBuffer()        coodFloat!!.put(coordinate)        coodFloat!!.position(0)        glHPosition = GLES20.glGetAttribLocation(programsId, "vPosition")        glHCoordinate = GLES20.glGetAttribLocation(programsId, "vTextureCoordinate")        glHTexture = GLES20.glGetUniformLocation(programsId, "vTexture")        mHCoord = GLES20.glGetAttribLocation(programsId, "vCoord")        mHMatrix = GLES20.glGetUniformLocation(programsId, "vMatrix")    }    public fun createTextureId(): Int {        val texture = IntArray(1)        GLES20.glGenTextures(1, texture, 0)        GLES20.glBindTexture(GLES11Ext.GL_TEXTURE_EXTERNAL_OES, texture[0])        GLES20.glTexParameterf(            GLES11Ext.GL_TEXTURE_EXTERNAL_OES, GL10.GL_TEXTURE_MIN_FILTER,            GL10.GL_LINEAR.toFloat()        )        GLES20.glTexParameterf(            GLES11Ext.GL_TEXTURE_EXTERNAL_OES, GL10.GL_TEXTURE_MAG_FILTER,            GL10.GL_LINEAR.toFloat()        )        GLES20.glTexParameterf(            GLES11Ext.GL_TEXTURE_EXTERNAL_OES, GL10.GL_TEXTURE_WRAP_S,            GL10.GL_CLAMP_TO_EDGE.toFloat()        )        GLES20.glTexParameterf(            GLES11Ext.GL_TEXTURE_EXTERNAL_OES, GL10.GL_TEXTURE_WRAP_T,            GL10.GL_CLAMP_TO_EDGE.toFloat()        )        return texture[0]    }    public fun setTextureId(id: Int) {        textureId = id    }    private fun createShader(str: String, style: Int): Int {        val shader: Int = GLES20.glCreateShader(style);        GLES20.glShaderSource(shader, str)        GLES20.glCompileShader(shader)        val state = IntArray(1)        GLES20.glGetShaderiv(shader, GLES20.GL_COMPILE_STATUS, state, 0)        if (state[0] == 0) {            LogUtil.e(TAG, "Could not compile shader " + shader + ":");            LogUtil.e(TAG, " " + GLES20.glGetShaderInfoLog(shader));            GLES20.glDeleteShader(shader)            throw IllegalStateException("Could not compile shader")        }        return shader;    }    private val vertexShaderCode = "attribute vec4 vPosition;" +            "attribute vec2 vCoord;" +            "varying vec2 vTextureCoordinate;" +            "uniform mat4 vMatrix;" +            "void main() {" +            "  gl_Position = vMatrix*vPosition;" +            "vTextureCoordinate = vCoord;" +            "}"    private val fragmentShaderCode = "#extension GL_OES_EGL_image_external : require" +            "precision mediump float;" +            "varying vec2 vTextureCoordinate;" +            "uniform samplerExternalOES vTexture;" +            "void main() {" +            "    gl_FragColor = texture2D(vTexture, vTextureCoordinate);" +            "}"    private val matrix: FloatArray = LogUtil.getOriginalMatrix()    public fun drawFrame() {        userProgram(programsId)        GLES20.glEnableVertexAttribArray(glHPosition)        GLES20.glEnableVertexAttribArray(mHCoord)        GLES20.glActiveTexture(GLES20.GL_TEXTURE0)        GLES20.glBindTexture(GLES11Ext.GL_TEXTURE_EXTERNAL_OES, textureId)        GLES20.glUniform1i(glHTexture, 0)        GLES20.glVertexAttribPointer(glHPosition, 2, GLES20.GL_FLOAT, false, 0, positionFloat)        GLES20.glVertexAttribPointer(mHCoord, 2, GLES20.GL_FLOAT, false, 0, coodFloat)        GLES20.glUniformMatrix4fv(mHMatrix, 1, false, matrix, 0)        GLES20.glDrawArrays(GLES20.GL_TRIANGLE_STRIP, 0, 4)        GLES20.glDisableVertexAttribArray(glHPosition)        GLES20.glDisableVertexAttribArray(mHCoord)    }    public fun setCoodData(cameraId: Int) {        coordinate = if (cameraId == 0) {//后置摄像头            floatArrayOf(                0.0f, 1.0f,                1.0f, 1.0f,                0.0f, 0.0f,                1.0f, 0.0f            )        } else {//前置摄像头            floatArrayOf(                1.0f, 1.0f,                0.0f, 1.0f,                1.0f, 0.0f,                0.0f, 0.0f            )        }    }}

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