带 JNA 的 x264 编码器
我一直忙于围绕 x264.dll 创建 JNA 包装器。我的 x264_param_t 有以下类：
但是，当我尝试初始化时我的 x264_param_t 就像
x264_param_t param_t = new x264_param_t;
我收到以下错误：
Exception in thread "main" java.lang.IllegalArgumentException: Can't determine size of nested structure: Can't instantiate class anotherReversed.x264_param_t$Vui (java.lang.InstantiationException: anotherReversed.x264_param_t$Vui)
at com.sun.jna.Structure.calculateSize(Structure.java:790)
at com.sun.jna.Structure.allocateMemory(Structure.java:287)
at com.sun.jna.Structure.<init>(Structure.java:177)
at com.sun.jna.Structure.<init>(Structure.java:167)
at com.sun.jna.Structure.<init>(Structure.java:163)
at com.sun.jna.Structure.<init>(Structure.java:154)
at anotherReversed.x264_param_t.<init>(x264_param_t.java:7)
如果我在其父类构造函数中注释掉 Vui，则实例化正常。我想知道这个嵌套结构有什么不同，因为还有另外两个结构（即 Rc 和 Analytics ）以相同的方式嵌套。但不知何故，JNA 无法找到 Vui 所需的大小。有什么指点吗？
编辑： 似乎所有其他嵌套结构（ analysis 和 rc ）也没有初始化。我想知道为什么？
I have been busy creating a JNA wrapper around x264.dll. I have the following class for my x264_param_t:
However, when I try to initialize my x264_param_t like that
x264_param_t param_t = new x264_param_t;
I get the following error:
Exception in thread "main" java.lang.IllegalArgumentException: Can't determine size of nested structure: Can't instantiate class anotherReversed.x264_param_t$Vui (java.lang.InstantiationException: anotherReversed.x264_param_t$Vui)
at com.sun.jna.Structure.calculateSize(Structure.java:790)
at com.sun.jna.Structure.allocateMemory(Structure.java:287)
at com.sun.jna.Structure.<init>(Structure.java:177)
at com.sun.jna.Structure.<init>(Structure.java:167)
at com.sun.jna.Structure.<init>(Structure.java:163)
at com.sun.jna.Structure.<init>(Structure.java:154)
at anotherReversed.x264_param_t.<init>(x264_param_t.java:7)
If I comment out the Vui in it's parent class constructor, the instantiation is ok. I wonder what is different with EXACTLY this nested structure, as there are 2 others (namely Rc and Analyse ) that are nested in the same way. Somehow, though, JNA isn't able to find the required size for Vui. Any pointers?
Edit:
It seems that all the other nested structs (analyse and rc ) were also not initialized. I wonder why?
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不要注释掉 Vui，而是用 Pointer 替换它，并检查其他两个结构是否已填充。
这些结构被定义为 x264_param_t 结构中的内部结构，也许 JNA 有问题。仔细查看 x264_param_t.toString() 的输出，因为它打印计算出的内存偏移量。
我希望您能在 jna 邮件列表
编辑
Instead of commenting out Vui, replace it with a Pointer and check if the other two structures are filled.
These structures are defined as inner structures within the x264_param_t struct, maybe JNA has problems with it. Take a closer look at the output of x264_param_t.toString(), as it prints calculated memory offsets.
I hope you'll find better answers at the jna mailing list
EDIT A dirty hack to solve the problem: use an array of ints or just dump all variables from the inner struct instead of using a separate class.