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2. IEGL类初始化封装java部分添加XPlay窗口类~1

发布时间：2021-06-10 17:44:37编辑：雪饮阅读（）

 首先需要初始化窗口cpp/native-lib.cpp:

#include <jni.h>
#include <string>
#include <android/native_window_jni.h>
#include "FFDemux.h"
#include "XLog.h"
#include "FFDecode.h"
#include "XEGL.h"

class TestObs:public IObserver
{
public:
    void Update(XData d)
    {
        //XLOGI("TestObs Update data size is %d",d.size);
    }
};



extern "C"
JNIEXPORT jstring

JNICALL
Java_com_example_xplay_MainActivity_stringFromJNI(
        JNIEnv *env,
        jobject /* this */) {
    std::string hello = "Hello from C++";

    //XLOGI("S begin!");
    //XSleep(3000);
    //XLOGI("S end!");
    //return env->NewStringUTF(hello.c_str());

    ///////////////////////////////////
    ///测试用代码
    TestObs *tobs = new TestObs();
    IDemux *de = new FFDemux();
    //de->AddObs(tobs);
    de->Open("/sdcard/1080.mp4");

    IDecode *vdecode = new FFDecode();
    vdecode->Open(de->GetVPara());

    IDecode *adecode = new FFDecode();
    adecode->Open(de->GetAPara());
    de->AddObs(vdecode);
    de->AddObs(adecode);

    //vdecode->Open();
    de->Start();
    vdecode->Start();
    adecode->Start();

    //XSleep(3000);
    //de->Stop();
    /*for(;;)
    {
        XData d = de->Read();
        XLOGI("Read data size is %d",d.size);


    }*/

    return env->NewStringUTF(hello.c_str());
}
extern "C"
JNIEXPORT void JNICALL
Java_com_example_xplay_XPlay_InitView(JNIEnv *env, jobject thiz, jobject surface) {
    ANativeWindow *win = ANativeWindow_fromSurface(env,surface);
    XEGL::Get()->Init(win);
}
然后要在视图文件中创建一个视频视图cpp/activity_main.xml:

<?xml version="1.0" encoding="utf-8"?>
 <androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:app="http://schemas.android.com/apk/res-auto"
     xmlns:tools="http://schemas.android.com/tools"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
     tools:context=".MainActivity">
 
     <TextView
         android:id="@+id/sample_text"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:text="Hello World!"
         app:layout_constraintBottom_toBottomOf="parent"
         app:layout_constraintLeft_toLeftOf="parent"
         app:layout_constraintRight_toRightOf="parent"
         app:layout_constraintTop_toTopOf="parent" />
     <com.example.xplay.XPlay
         android:layout_width="match_parent"
         android:layout_height="match_parent" />
 
 </androidx.constraintlayout.widget.ConstraintLayout>

Xplay.java中要获取Surface：

package com.example.xplay;
 
 import android.content.Context;
 import android.opengl.GLSurfaceView;
 import android.util.AttributeSet;
 import android.view.SurfaceHolder;
 
 /**
  * Created by Administrator on 2018-03-04.
  */
 
 public class XPlay extends GLSurfaceView implements SurfaceHolder.Callback {
     public XPlay(Context context, AttributeSet attrs) {
         super( context, attrs );
     }
     @Override
     public void surfaceCreated(SurfaceHolder holder)
     {
         //初始化opengl egl 显示
         InitView(holder.getSurface());
     }
 
     @Override
     public void surfaceChanged(SurfaceHolder var1, int var2, int var3, int var4)
     {
 
     }
 
     @Override
     public void surfaceDestroyed(SurfaceHolder var1)
     {
 
     }
     public native void InitView(Object surface);
 
 }

然后在cpp/XEGL.cpp中具体的实现初始化：

#include <android/native_window.h>
 #include <EGL/egl.h>
 #include "XEGL.h"
 #include "XLog.h"
 class CXEGL:public XEGL
 {
 public:
     EGLDisplay display = EGL_NO_DISPLAY;
     EGLSurface surface = EGL_NO_SURFACE;
     EGLContext context = EGL_NO_CONTEXT;
 
     virtual bool Init(void *win)
     {
         ANativeWindow *nwin = (ANativeWindow *)win;
 
         //初始化EGL
 
         //1 获取EGLDisplay对象显示设备
         display = eglGetDisplay(EGL_DEFAULT_DISPLAY);
         if(display == EGL_NO_DISPLAY)
         {
             XLOGE("eglGetDisplay failed!");
             return false;
         }
         XLOGE("eglGetDisplay success!");
         //2 初始化Display
         if(EGL_TRUE != eglInitialize(display,0,0))
         {
             XLOGE("eglInitialize failed!");
             return false;
         }
         XLOGE("eglInitialize success!");
 
         //3 获取配置并创建surface
         EGLint configSpec [] = {
                 EGL_RED_SIZE,8,
                 EGL_GREEN_SIZE,8,
                 EGL_BLUE_SIZE,8,
                 EGL_SURFACE_TYPE,EGL_WINDOW_BIT,
                 EGL_NONE
         };
         EGLConfig config = 0;
         EGLint numConfigs = 0;
         if(EGL_TRUE != eglChooseConfig(display,configSpec,&config,1,&numConfigs))
         {
             XLOGE("eglChooseConfig failed!");
             return false;
         }
         XLOGE("eglChooseConfig success!");
         surface = eglCreateWindowSurface(display,config,nwin,NULL);
 
 
         //4 创建并打开EGL上下文
         const EGLint ctxAttr[] = { EGL_CONTEXT_CLIENT_VERSION ,2, EGL_NONE};
         context = eglCreateContext(display,config,EGL_NO_CONTEXT,ctxAttr);
         if(context == EGL_NO_CONTEXT)
         {
             XLOGE("eglCreateContext failed!");
             return false;
         }
         XLOGE("eglCreateContext success!");
 
         if(EGL_TRUE != eglMakeCurrent(display,surface,surface,context))
         {
             XLOGE("eglMakeCurrent failed!");
             return false;
         }
         XLOGE("eglMakeCurrent success!");
 
         return true;
     }
 };
 
 XEGL *XEGL::Get()
 {
     static CXEGL egl;
     return &egl;
 }

魅族16T表示依然没有问题