OpenGL播放yuv数据流(着色器SHADER)-android(一)

OpenGL播放yuv数据流(着色器SHADER)-android(一)

可以参考：http://blog.csdn.net/ueryueryuery/article/details/17608185这篇文章很有帮助。

这个和windows还有ios略有不同，下面将步骤整理一下以做记录：

1：在avtivity_main.xml中添加用于显示的GLsurfaceView

2：将GLsurfaceView传到里面

//得到opengal渲染用的surfaceView
openglsurfaceView = (GLSurfaceView) findViewById(R.id.lvsPlaySurfaceView);

3：需要添加权限在AndroidMainfest.xml中：

4：下面就是具体的实现代码

//.java

package com.example.zhuweigang.lvsandroidplay;

import android.content.Context;
import android.opengl.GLES20;
import android.opengl.GLSurfaceView;
import android.support.v4.app.NavUtils;
import android.util.AttributeSet;
import android.util.Log;
import android.view.SurfaceHolder;
import javax.microedition.khronos.egl.EGLConfig;
import javax.microedition.khronos.opengles.GL10;

import java.nio.Buffer;
import java.nio.ByteBuffer;
import java.nio.ByteOrder;

/**
 * Created by zhuweigang on 2016/12/26.
 */

public class Lvs_OpenGl_Interface_Android implements GLSurfaceView.Renderer
{
    private static final String TAG = "lvs_OpenGL";

    //顶点数组(物体表面坐标取值范围是-1到1,数组坐标：左下，右下，左上，右上)
    private static float[] vertexVertices = {
        -1.0f, -1.0f,
        1.0f, -1.0f,
        -1.0f,  1.0f,
        1.0f,  1.0f,
    };

    //像素，纹理数组(纹理坐标取值范围是0-1，坐标原点位于左下角,数组坐标：左上，右上，左下，右下,如果先左下，图像会倒过来)
    private static float[] textureVertices = {
        0.0f,  1.0f,
        1.0f,  1.0f,
        0.0f,  0.0f,
        1.0f,  0.0f,
    };

    //shader的vsh源码字符串
    private static final String vertexShaderString =
            "attribute vec4 vertexIn;" +
            "attribute vec2 textureIn;" +
            "varying vec2 textureOut;" +
            "void main() {" +
                "gl_Position = vertexIn;" +
                "textureOut = textureIn;" +
            "}";

    //shader的fsh源码字符串
    private static final String yuvFragmentShaderString =
            "precision mediump float;" +
            "uniform sampler2D tex_y;" +
            "uniform sampler2D tex_u;" +
            "uniform sampler2D tex_v;" +
            "varying vec2 textureOut;" +
            "void main() {" +
                "vec4 c = vec4((texture2D(tex_y, textureOut).r - 16./255.) * 1.164);" +
                "vec4 U = vec4(texture2D(tex_u, textureOut).r - 128./255.);" +
                "vec4 V = vec4(texture2D(tex_v, textureOut).r - 128./255.);" +
                "c += V * vec4(1.596, -0.813, 0, 0);" +
                "c += U * vec4(0, -0.392, 2.017, 0);" +
                "c.a = 1.0;" +
                "gl_FragColor = c;" +
            "}";

    //着色器用的顶点属性索引 position是由3个（x,y,z）组成，
    public int ATTRIB_VERTEX = 0;
    //着色器用的像素，纹理属性索引 而颜色是4个（r,g,b,a）
    public int ATTRIB_TEXTURE = 0;

    private GLSurfaceView mTargetSurface;                                                              //外部传入的GLSurfaceView
    public int p = 0;                                                                                    //Program着色器程序的id
    ByteBuffer vertexVertices_buffer = null;                                                           //定义顶点数组
    ByteBuffer textureVertices_buffer = null;                                                          //定义像素纹理数组
    public int m_IsInitShaders = 0;                                                                    //是否已经InitShaders，onSurfaceCreated
    public Lvs_Play_Interface_Sdk_Android.OpenGl_DisplayCallBackInterface m_displaydatack = null;      //用于显示回调函数，参数数据及时间戳
    public byte m_yuvbuf[] = new byte[640*480*3];												       //存放yuv数据的buf指针，申请buffer在外面
    public ByteBuffer yuvplaner_y = null;                                                               //分用于渲染的变量
    public ByteBuffer yuvplaner_u = null;                                                               //分用于渲染的变量
    public ByteBuffer yuvplaner_v = null;                                                               //分用于渲染的变量;
    public int[] m_millis_realtime = new int[1];                                                      //实时的时间戳，每次回调会更新
    public int m_yuvdata_width = 0;											                            //数据宽
    public int m_yuvdata_height = 0;										                            //数据高
    public int m_frameBuffer = 0;                                                                       //framebuffer
    public int m_renderBuffer = 0;                                                                      //renderbuffer
    public int m_textureid_y, m_textureid_u, m_textureid_v;                                         //纹理的名称，并且，该纹理的名称在当前的应用中不能被再次使用。
    public int m_textureUniformY, m_textureUniformU,m_textureUniformV;                            //用于纹理渲染的变量

    //构造方法
    public Lvs_OpenGl_Interface_Android(GLSurfaceView paramGLSurfaceView)
    {
        //将surfaceview传进来用于显示数据时候刷新
        mTargetSurface = paramGLSurfaceView;

        //应用GlsurfaceView版本号2.0
        mTargetSurface.setEGLContextClientVersion(2);
    }

    @Override
    public void onSurfaceCreated(GL10 gl10, EGLConfig eglConfig)
    {
        Log.i(TAG, "onSurfaceCreated :");
        //这个必须在onSurfaceCreated中，否则失败
        //初始化着色器，类似于告GPU当传进去数据的时候采用什么样的规则。
        InitShaders();
        m_IsInitShaders = 1;
    }

    @Override
    public void onSurfaceChanged(GL10 gl10, int width, int height)
    {
        GLES20.glViewport(0, 0, width, height);
    }

    @Override
    public void onDrawFrame(GL10 gl10)
    {
        //这里做具体的处理
        //具体的显示
        if (mTargetSurface != null)
        {
            DisplayImage(0);
        }
    }

    //接口初始化
    int lvs_opengl_interface_init(GLSurfaceView surface,int yuvdata_width,int yuvdata_height,
                                  Lvs_Play_Interface_Sdk_Android.OpenGl_DisplayCallBackInterface displaydatack)
    {
        int ret  = 0;

        //初始化
        ret = initopengl(yuvdata_width,yuvdata_height,displaydatack);
        if (ret != 1)
        {
            return -1;
        }

        ret = 1;

        return ret ;
    }

    //接口渲染数据(定时器，渲染时间,毫秒),数据及渲染定时时间在回调里面做处理
    void lvs_opengl_interface_write(int value)
    {
        //这里如果有可能则调成类的成员函数，以后处理，暂时不知道怎么解决类成员函数递归
        TimerFunc1();
    }

    //渲染数据(定时器，渲染时间,毫秒),数据及渲染定时时间在回调里面做处理
    void TimerFunc1()
    {
        int ret = 0;

        //因为glut的定时器是调用一次才产生一次定时，所以如果要持续产生定时的话，
        //在定时函数末尾再次调用glutTimerFunc

        //调用回调函数获取数据
        if (m_displaydatack != null && m_IsInitShaders == 1)
        {
            ret= m_displaydatack.OpenGl_DisplayDataCallback(m_yuvbuf,m_millis_realtime);
            if (ret > 0)
            {
                //刷新让他能显示在onDrawFrame中处理
                mTargetSurface.requestRender();
                try {
                    Thread.sleep(m_millis_realtime[0]);
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
            }
            else
            {
                try {
                    Thread.sleep(1);
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
            }
            //递归调用自身,java用递归调用本身有问题了，外面for循环调用处理
            //TimerFunc1(opengl_interface);
        }
    }

    //初始化
    int initopengl(int yuvdata_width,int yuvdata_height, Lvs_Play_Interface_Sdk_Android.OpenGl_DisplayCallBackInterface displaydatack)
    {
        int ret = 0;

        m_yuvdata_width = yuvdata_width;
        m_yuvdata_height = yuvdata_height;
        m_displaydatack = displaydatack;

        //分配内存
        if (yuvplaner_y == null)
        {
            yuvplaner_y = ByteBuffer.allocate(m_yuvdata_width*m_yuvdata_height + 100);
        }
        if (yuvplaner_u == null)
        {
            yuvplaner_u = ByteBuffer.allocate(m_yuvdata_width*m_yuvdata_height + 100);
        }
        if (yuvplaner_v == null)
        {
            yuvplaner_v = ByteBuffer.allocate(m_yuvdata_width*m_yuvdata_height + 100);
        }

        ret = 1;
        return ret;
    }
    //初始化着色器，类似于告GPU当传进去数据的时候采用什么样的规则。
    void InitShaders()
    {
        int error = 0;

        createBuffers(vertexVertices, textureVertices);

        p = createProgram(vertexShaderString, yuvFragmentShaderString);
        ATTRIB_VERTEX = GLES20.glGetAttribLocation(p, "vertexIn");
        if (ATTRIB_VERTEX == -1)
        {
            Log.i(TAG, "glGetAttribLocation : " + error);
        }
        ATTRIB_TEXTURE = GLES20.glGetAttribLocation(p, "textureIn");
        if (ATTRIB_TEXTURE == -1)
        {
            Log.i(TAG, "glGetAttribLocation : " + error);
        }

        //Program:  在链接了程序以后，我们可以使用glUseProgram()函数来加载并使用链接好的程序
        GLES20.glUseProgram(p);

        //获取片源着色器源码中的变量,用于纹理渲染
        m_textureUniformY = GLES20.glGetUniformLocation(p, "tex_y");
        m_textureUniformU = GLES20.glGetUniformLocation(p, "tex_u");
        m_textureUniformV = GLES20.glGetUniformLocation(p, "tex_v");

        //初始化纹理
        int[] textures_y = new int[1];
        GLES20.glGenTextures(1, textures_y,0);
        m_textureid_y = textures_y[0];
        textures_y = null;
        //绑定纹理
        GLES20.glBindTexture(GLES20.GL_TEXTURE_2D, m_textureid_y);
        //设置该纹理的一些属性
        GLES20.glTexParameteri(GLES20.GL_TEXTURE_2D,GLES20.GL_TEXTURE_MAG_FILTER,GLES20.GL_LINEAR);
        GLES20.glTexParameteri(GLES20.GL_TEXTURE_2D,GLES20.GL_TEXTURE_MIN_FILTER,GLES20.GL_LINEAR);
        GLES20.glTexParameteri(GLES20.GL_TEXTURE_2D, GLES20.GL_TEXTURE_WRAP_S, GLES20.GL_CLAMP_TO_EDGE);
        GLES20.glTexParameteri(GLES20.GL_TEXTURE_2D, GLES20.GL_TEXTURE_WRAP_T, GLES20.GL_CLAMP_TO_EDGE);

        int[] textures_u = new int[1];
        GLES20.glGenTextures(1, textures_u,0);
        m_textureid_u = textures_u[0];
        textures_u = null;
        GLES20.glBindTexture(GLES20.GL_TEXTURE_2D, m_textureid_u);
        GLES20.glTexParameteri(GLES20.GL_TEXTURE_2D,GLES20.GL_TEXTURE_MAG_FILTER,GLES20.GL_LINEAR);
        GLES20.glTexParameteri(GLES20.GL_TEXTURE_2D,GLES20.GL_TEXTURE_MIN_FILTER,GLES20.GL_LINEAR);
        GLES20.glTexParameteri(GLES20.GL_TEXTURE_2D, GLES20.GL_TEXTURE_WRAP_S, GLES20.GL_CLAMP_TO_EDGE);
        GLES20.glTexParameteri(GLES20.GL_TEXTURE_2D, GLES20.GL_TEXTURE_WRAP_T, GLES20.GL_CLAMP_TO_EDGE);

        int[] textures_v = new int[1];
        GLES20.glGenTextures(1, textures_v,0);
        m_textureid_v = textures_v[0];
        textures_v = null;
        GLES20.glBindTexture(GLES20.GL_TEXTURE_2D, m_textureid_v);
        GLES20.glTexParameteri(GLES20.GL_TEXTURE_2D,GLES20.GL_TEXTURE_MAG_FILTER,GLES20.GL_LINEAR);
        GLES20.glTexParameteri(GLES20.GL_TEXTURE_2D,GLES20.GL_TEXTURE_MIN_FILTER,GLES20.GL_LINEAR);
        GLES20.glTexParameteri(GLES20.GL_TEXTURE_2D, GLES20.GL_TEXTURE_WRAP_S, GLES20.GL_CLAMP_TO_EDGE);
        GLES20.glTexParameteri(GLES20.GL_TEXTURE_2D, GLES20.GL_TEXTURE_WRAP_T, GLES20.GL_CLAMP_TO_EDGE);
        return;
    }
    //具体显示图像的函数(参数是指针)
    int DisplayImage(long parm)
    {
        int ret = 0;

        //关联到yuv数据的分量数组
        if (yuvplaner_y != null)
        {
            yuvplaner_y.clear();
            yuvplaner_y.put(m_yuvbuf,0,m_yuvdata_width*m_yuvdata_height);
            yuvplaner_y.position(0);
        }
        if (yuvplaner_u != null)
        {
            yuvplaner_u.clear();
            yuvplaner_u.put(m_yuvbuf,m_yuvdata_width*m_yuvdata_height,m_yuvdata_width*m_yuvdata_height/4);
            yuvplaner_u.position(0);
        }
        if (yuvplaner_v != null)
        {
            yuvplaner_v.clear();
            yuvplaner_v.put(m_yuvbuf,m_yuvdata_width*m_yuvdata_height + m_yuvdata_width*m_yuvdata_height/4,m_yuvdata_width*m_yuvdata_height/4);
            yuvplaner_v.position(0);
        }

        //Clear
        //清除颜色设为黑色，把整个窗口清除为当前的清除颜色，glClear（）的唯一参数表示需要被清除的缓冲区。
        GLES20.glClearColor(0.0f,0.0f,0.0f,1.0f);
        GLES20.glClear(GLES20.GL_COLOR_BUFFER_BIT);

        //定义顶点数组,android平台要在这里做其他平台在initshader中，否则显示不出来图像
        GLES20.glVertexAttribPointer(ATTRIB_VERTEX, 2, GLES20.GL_FLOAT, false, 0, vertexVertices_buffer);
        //启用属性数组，android平台要在这里做其他平台在initshader中，否则显示不出来图像
        GLES20.glEnableVertexAttribArray(ATTRIB_VERTEX);
        //定义像素纹理数组，android平台要在这里做其他平台在initshader中，否则显示不出来图像
        GLES20. glVertexAttribPointer(ATTRIB_TEXTURE, 2, GLES20.GL_FLOAT, false, 0, textureVertices_buffer);
        //启用属性数组，android平台要在这里做其他平台在initshader中，否则显示不出来图像
        GLES20.glEnableVertexAttribArray(ATTRIB_TEXTURE);

        //显卡中有N个纹理单元（具体数目依赖你的显卡能力），每个纹理单元（GL_TEXTURE0、GL_TEXTURE1等）都有GL_TEXTURE_1D、GL_TEXTURE_2D等
        //Y
        //选择当前活跃的纹理单元
        GLES20.glActiveTexture(GLES20.GL_TEXTURE0);
        //允许建立一个绑定到目标纹理的有名称的纹理
        GLES20.glBindTexture(GLES20.GL_TEXTURE_2D, m_textureid_y);
        //根据指定的参数，生成一个2D纹理（Texture）。相似的函数还有glTexImage1D、glTexImage3D。
        GLES20.glTexImage2D(GLES20.GL_TEXTURE_2D, 0, GLES20.GL_LUMINANCE, m_yuvdata_width, m_yuvdata_height, 0, GLES20.GL_LUMINANCE, GLES20.GL_UNSIGNED_BYTE, yuvplaner_y);
        GLES20.glUniform1i(m_textureUniformY, 0);     //设置纹理，按照前面设置的规则怎样将图像或纹理贴上（参数和选择的活跃纹理单元对应，GL_TEXTURE0）

        //U
        GLES20.glActiveTexture(GLES20.GL_TEXTURE1);
        GLES20.glBindTexture(GLES20.GL_TEXTURE_2D, m_textureid_u);
        GLES20.glTexImage2D(GLES20.GL_TEXTURE_2D, 0, GLES20.GL_LUMINANCE, m_yuvdata_width/2, m_yuvdata_height/2, 0, GLES20.GL_LUMINANCE, GLES20.GL_UNSIGNED_BYTE, yuvplaner_u);
        GLES20.glUniform1i(m_textureUniformU, 1);
        //V
        GLES20.glActiveTexture(GLES20.GL_TEXTURE2);
        GLES20.glBindTexture(GLES20.GL_TEXTURE_2D, m_textureid_v);
        GLES20.glTexImage2D(GLES20.GL_TEXTURE_2D, 0, GLES20.GL_LUMINANCE, m_yuvdata_width/2, m_yuvdata_height/2, 0, GLES20.GL_LUMINANCE, GLES20.GL_UNSIGNED_BYTE, yuvplaner_v);
        GLES20.glUniform1i(m_textureUniformV, 2);

        // Draw
        // 绘制
        GLES20.glDrawArrays(GLES20.GL_TRIANGLE_STRIP, 0, 4);
        //单缓冲显示
        GLES20.glFlush();

        GLES20.glDisableVertexAttribArray(ATTRIB_VERTEX);
        GLES20.glDisableVertexAttribArray(ATTRIB_TEXTURE);

        return 1;
    }

    /**
     * create program and load shaders, fragment shader is very important.
     */
    public int createProgram(String vertexSource, String fragmentSource) {
        // create shaders
        int vertexShader = loadShader(GLES20.GL_VERTEX_SHADER, vertexSource);
        int pixelShader = loadShader(GLES20.GL_FRAGMENT_SHADER, fragmentSource);
        // just check

        int program = GLES20.glCreateProgram();
        if (program != 0) {
            GLES20.glAttachShader(program, vertexShader);
            GLES20.glAttachShader(program, pixelShader);
            GLES20.glLinkProgram(program);
            int[] linkStatus = new int[1];
            GLES20.glGetProgramiv(program, GLES20.GL_LINK_STATUS, linkStatus, 0);
            if (linkStatus[0] != GLES20.GL_TRUE) {
                GLES20.glDeleteProgram(program);
                program = 0;
            }
        }
        return program;
    }
    /**
     * create shader with given source.
     */
    private int loadShader(int shaderType, String source)
    {
        int shader = GLES20.glCreateShader(shaderType);
        if (shader != 0) {
            GLES20.glShaderSource(shader, source);
            GLES20.glCompileShader(shader);
            int[] compiled = new int[1];
            GLES20.glGetShaderiv(shader, GLES20.GL_COMPILE_STATUS, compiled, 0);
            if (compiled[0] == 0)
            {
                GLES20.glDeleteShader(shader);
                shader = 0;
            }
        }
        return shader;
    }

    /**
     * these two buffers are used for holding vertices, screen vertices and texture vertices.
     */
    private void createBuffers(float[] vert, float[] coord) {
        vertexVertices_buffer = ByteBuffer.allocateDirect(vert.length * 4);
        vertexVertices_buffer.order(ByteOrder.nativeOrder());
        vertexVertices_buffer.asFloatBuffer().put(vert);
        vertexVertices_buffer.position(0);

        if (textureVertices_buffer == null) {
            textureVertices_buffer = ByteBuffer.allocateDirect(coord.length * 4);
            textureVertices_buffer.order(ByteOrder.nativeOrder());
            textureVertices_buffer.asFloatBuffer().put(coord);
            textureVertices_buffer.position(0);
        }
    }
}

5：调用代码

        //GLSurfaceView
        m_glsurfaceview = nsurfaceView;
        //opengl的view类
        pinterfaceOpenGL = new Lvs_OpenGl_Interface_Android(m_glsurfaceview);
        m_glsurfaceview.setRenderer(pinterfaceOpenGL);
        // 只有在绘制数据改变时才绘制view
        m_glsurfaceview.setRenderMode(GLSurfaceView.RENDERMODE_WHEN_DIRTY);

                //Opengl初始化
                ret = pinterfaceOpenGL.lvs_opengl_interface_init(m_glsurfaceview,m_opengl_width,m_opengl_height,
                        opengl_displaycallback);
                if (ret < 0)
                {
                    return;
                }

                for (;;)
                {
                    try {
                        Thread.sleep(1);
                    } catch (InterruptedException e) {
                        e.printStackTrace();
                    }

                    //渲染，带定时器,数据回调，及渲染时间回调，第一帧timer 40以后根据时间戳做调整
                   pinterfaceOpenGL.lvs_opengl_interface_write(40);
                }

6：数据传入在回掉函数

ret= m_displaydatack.OpenGl_DisplayDataCallback(m_yuvbuf,m_millis_realtime);中

7：实现效果

本demo还需完善。

如有错误请指正：

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