OpenGL ES渲染YUV纹理(2)

实现JfGLSurfaceView

package com.example.myplayer.opengl;
import android.content.Context;
import android.opengl.GLSurfaceView;
import android.util.AttributeSet;
public class JfGLSurfaceView extends GLSurfaceView {
    private JfRender jfRender;
    public JfGLSurfaceView(Context context) {
        this(context,null);
    }
    public JfGLSurfaceView(Context context, AttributeSet attrs) {
        super(context, attrs);
        setEGLContextClientVersion(2);
        jfRender = new JfRender(context);
        setRenderer(jfRender);
        setRenderMode(GLSurfaceView.RENDERMODE_WHEN_DIRTY);//requestRender()时不会重复渲染
    }
    public void setYUVData(int width,int height,byte[] y,byte[] u,byte[] v){
        if (jfRender != null) {
            jfRender.setYUVRenderData(width, height, y, u, v);
            requestRender();
        }
    }
}

JfPlayer.java中调用

private JfGLSurfaceView jfGLSurfaceView;
public void setJfGLSurfaceView(JfGLSurfaceView jfGLSurfaceView) {
    this.jfGLSurfaceView = jfGLSurfaceView;
}
/**
 *
 * @param width
 * @param height
 * @param y
 * @param u
 * @param v
 */
public void onCallRenderYUV(int width,int height,byte[] y,byte[] u,byte[] v){
    JfLog.d("获取到视频的数据");
    if (jfGLSurfaceView != null) {
        jfGLSurfaceView.setYUVData(width, height, y, u, v);
    }
}

MainActivity中设置WlGLSurfaceView：

private WlGLSurfaceView wlGLSurfaceView;
jfGLSurfaceView = (JfGLSurfaceView) findViewById(R.id.jfglsfv);
jfPlayer.setJfGLSurfaceView(jfGLSurfaceView);

因为在JfRender.java中的private void renderYUV()方法中有一个判断语句,

if(width_yuv > 0 && height_yuv > 0 && y != null && u != null && v != null){}

有也许视频中的那些AVFrame可能不满足某些条件，比如y、u、v数据某一个为空，

GLES20.glDrawArrays(GLES20.GL_TRIANGLE_STRIP, 0, 4);

导致这句不执行万能播放器java版，所以没有画上去矩形；

@Override
public void onDrawFrame(GL10 gl) {
    //用黑色清屏
    GLES20.glClear(GLES20.GL_COLOR_BUFFER_BIT);
    GLES20.glClearColor(0.0f, 0.0f, 0.0f, 1.0f);
    renderYUV();
}

在onDrawFrame回调方法中就用红色清了一次屏，所以会闪黑屏！

如果改为

@Override
public void onDrawFrame(GL10 gl) {
    //用黑色清屏
    GLES20.glClear(GLES20.GL_COLOR_BUFFER_BIT);
    GLES20.glClearColor(1.0f, 0.0f, 0.0f, 1.0f);
    renderYUV();
}

会很明显的闪红屏！

解决方法：

不管有没有渲染都把矩形画上去！

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