//
// Created by 倪路朋 on 4/13/25.
//

#include "live_view_call.h"
#include "server_global.h"

LiveViewCall::LiveViewCall(JNIEnv *env_, jobject instance_) {
    this->env = env_;
    this->env->GetJavaVM(&javaVM);
    this->instance = env->NewGlobalRef(instance_);
    jclass localClazz = env->FindClass("com/runt/live/cpp/LiveMiniView");
    if (localClazz == nullptr || env->ExceptionCheck()) {
        env->ExceptionDescribe();
        env->ExceptionClear();
        return;
    }

    // 拿一个 global ref：关键！！
    //jobject，jclass等对象在方法执行完后就会被回收
    miniClazz = (jclass)env->NewGlobalRef(localClazz);
    jmd_draw_text = env->GetStaticMethodID(miniClazz,"drawText","([BIII)[B");
};

LiveViewCall::~LiveViewCall() {
    javaVM = 0 ;
    env->DeleteGlobalRef(instance);
    env->DeleteGlobalRef(miniClazz);
    instance = 0 ;
}
uint8_t *LiveViewCall::drawText(int stream_code, uint8_t *yuvData[3],int width,int height) {

    //******转为rgba
    int size = width * height * 4;
    uint8_t *rgba_data = yuvToRGBA(yuvData,width,height);
    //转为java字节数组
    jint res = javaVM->AttachCurrentThread(&env, nullptr);

    jbyteArray java_array = env->NewByteArray(size);
    env->SetByteArrayRegion(java_array, 0, size, (jbyte *)rgba_data);
    delete[] rgba_data;
    jbyteArray rgbaArray = (jbyteArray)env->CallStaticObjectMethod(miniClazz, jmd_draw_text,java_array,stream_code,width,height);
    env->DeleteLocalRef(java_array);
// 2. 分配 native buffer
    uint8_t* rgba_copy = new uint8_t[size];
// 3. 拷贝数据
    env->GetByteArrayRegion(rgbaArray, 0, size, reinterpret_cast<jbyte*>(rgba_copy));
    env->DeleteLocalRef(rgbaArray);
    javaVM->DetachCurrentThread();
    return rgba_copy;
}