Question

每当我尝试在monodroid中创建一个新的音频上下文时，它都会告诉我openal32.dll缺失;这自然没有意义，因为这是monodroid，openal是OpenTK的一部分。

我只能假设我做错了什么，但我之前在Windows下使用过OpenTK / OpenAL并且使用类似的代码管理得很好。

无论如何，这是违规代码：

        public Audio()
    {
        if (Loaded == false)
        {
            Loaded = true;
            try
            {
                try {Console.WriteLine ("Current: " + AudioContext.CurrentContext.ToString());} catch { Console.WriteLine ("no current context"); }
                try {Console.WriteLine ("Default: " + AudioContext.DefaultDevice);} catch { Console.WriteLine ("no default device"); }

                Context = new AudioContext();
                ValidContext = true; //we have a valid audio context!
            }
            catch (Exception ex)
            {
                Console.WriteLine ("Loading the audio context failed.");
                Console.WriteLine (ex.ToString ());
                Console.WriteLine (ex.Message);
                ValidContext = false; //Loading the audio context failed :(
            }
        }
    }

这是输出：

I/monodroid-gc(24762): environment supports jni NewWeakGlobalRef

D/AndroidGameView(24762): SurfaceCreated

D/libEGL  (24762): egl.cfg not found, using default config

D/libEGL  (24762): loaded /system/lib/egl/libGLES_android.so

I/mono-stdout(24762): no current context

I/mono-stdout(24762): no default device

I/mono-stdout(24762): Loading the audio context failed.

I/mono-stdout(24762): System.TypeInitializationException: An exception was thrown by the type initializer for OpenTK.Audio.AudioContext ---> System.TypeInitializationException: An exception was thrown by the type initializer for OpenTK.Audio.AudioDeviceEnumerator ---> System.DllNotFoundException: openal32.dll

I/mono-stdout(24762):   at (wrapper managed-to-native) OpenTK.Audio.OpenAL.Alc:MakeContextCurrent (intptr)

I/mono-stdout(24762):   at OpenTK.Audio.OpenAL.Alc.MakeContextCurrent (ContextHandle context) [0x00000] in <filename unknown>:0 

I/mono-stdout(24762):   at OpenTK.Audio.AudioDeviceEnumerator..cctor () [0x00000] in <filename unknown>:0 

I/mono-stdout(24762):   --- End of inner exception stack trace ---

I/mono-stdout(24762):   at OpenTK.Audio.AudioContext..cctor () [0x00000] in <filename unknown>:0 

I/mono-stdout(24762):   --- End of inner exception stack trace ---

I/mono-stdout(24762):   at Hardware.Audio..ctor () [0x00000] in <filename unknown>:0 

I/mono-stdout(24762): An exception was thrown by the type initializer for OpenTK.Audio.AudioContext

I/ARMAssembler(24762): generated scanline__00000177:03545444_00009001_00000000 [159 ipp] (215 ins) at [0x4fc138:0x4fc494] in 4168381 ns

Answer 1

openal32.dll不包含在OpenTK中。 OpenTK只有OpenAL的绑定。就像opengl32.dll（包含在显卡驱动程序中）一样，必须通过声卡驱动程序（或其软件实现）安装openal32.dll。

快速搜索后，您似乎需要编译OpenAL for Android的软件实现：http://pielot.org/2010/12/14/openal-on-android/

编辑：看起来Android更喜欢使用较新的OpenSL ES。如果您有一些时间，可以尝试让OpenTK的生成器为您生成OpenSL ES绑定。

This other StackOverflow question还有其他一些使用OpenSL的选项。

如何在monodroid中使用OpenAL创建音频上下文？

1 个答案: