Convert YUV to RGB

yuv2rgb

const char fragmentShader_yuv420p[] =
{
    "precision mediump float;\n"
    "uniform sampler2D Ytex;\n"
    "uniform sampler2D Utex,Vtex;\n"
    "varying vec2 vTextureCoord;\n"
    "void main(void) {\n"
    " float nx,ny,r,g,b,y,u,v;\n"
    " mediump vec4 txl,ux,vx;"
    " nx=vTextureCoord[0];\n"
    " ny=vTextureCoord[1];\n"
    " y=texture2D(Ytex,vec2(nx,ny)).r;\n"
    " u=texture2D(Utex,vec2(nx,ny)).r;\n"
    " v=texture2D(Vtex,vec2(nx,ny)).r;\n"
     
    
    " y=1.1643*(y-0.0625);\n"
    " u=u-0.5;\n"
    " v=v-0.5;\n"
     
    
    " r=y+1.5958*v;\n"
    " g=y-0.39173*u-0.81290*v;\n"
    " b=y+2.017*u;\n"
    " gl_FragColor=vec4(r,g,b,1.0);\n"
    "}\n"
};