Openal - alGetError()始终返回AL_INVALID_OPERATION

Question

我在pendrive上运行ubuntu 12.04.我安装了openAL,我的主要是:

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <iostream>
#include <al.h> 
#include <alc.h>

// Buffers hold sound data.
ALuint Buffer;
using namespace std;
string ErrorCheck(ALenum error)
{
    if(error == AL_INVALID_NAME)
    {
        return "Invalid name";
    }
    else if(error == AL_INVALID_ENUM)
    {
        return " Invalid enum ";
    }
    else if(error == AL_INVALID_VALUE)
    {
        return " Invalid value ";
    }
    else if(error == AL_INVALID_OPERATION)
    {
        return " Invalid operation ";
    }
    else if(error == AL_OUT_OF_MEMORY)
    {
        return " Out of memory like! ";
    }

    return " Don't know ";


}

int main(int argc, char **argv)

{
    ALenum error;   

    error = alGetError();
    cout << "\n\tInitial error at start of program - " << ErrorCheck(error);

    error = alGetError();
    cout << "\n\tError persists - " << ErrorCheck(error);

    cout << "\n\tGenerating buffer...";
    alGenBuffers(1, &Buffer);

    error = alGetError();
    if(error != AL_NO_ERROR)
    {
        cout << "\n\tError generating buffer - "<< ErrorCheck(error) << "\n\n";
        return 0;
    }


    return 0;
}

使用该行编译时没有错误

g++ main.cpp -I/usr/include/AL -lopenal -lalut

但是当程序运行时,每次调用alGetError()都会返回AL_INVALID_OPERATION我认为调用alGetError()意味着重置错误标志,所以我在开始时调用它两次,第二个应该至少不返回错误.我真的卡住了!

Answer 1

该线程的答案仍然适合您的问题。我没有在您的代码中看到任何 OpenAL 上下文的创建。

http://opensource.creative.com/pipermail/openal/2008-May/011130.html