从管道顺序读取OpenEXR

Question

我正在尝试从一个管道读取EXR流，处理它们并将结果写入另一个管道。在这种情况下，它们被命名为管道，但它们也可以是stdin和stdout。

我的问题出现在管道干裂的时候。OpenEXR不喜欢尝试读取任何内容，并使用以下堆栈跟踪崩溃。

(gdb) run in.exr out.exr
Starting program: /Users/jon/Library/Developer/Xcode/DerivedData/compressor-abhdftqzleulxsfkpidvcazfowwo/Build/Products/Debug/compressor in.exr out.exr
Reading symbols for shared libraries +++++++++......................................................................................................... done
Reading symbols for shared libraries ............ done
Reading symbols for shared libraries . done
Reading symbols for shared libraries . done
terminate called throwing an exception
Program received signal SIGABRT, Aborted.
0x00007fff90957ce2 in __pthread_kill ()
(gdb) backtrace
#0  0x00007fff90957ce2 in __pthread_kill ()
#1  0x00007fff866f27d2 in pthread_kill ()
#2  0x00007fff866e3a7a in abort ()
#3  0x00007fff8643c7bc in abort_message ()
#4  0x00007fff86439fcf in default_terminate ()
#5  0x00007fff844d61cd in _objc_terminate ()
#6  0x00007fff8643a001 in safe_handler_caller ()
#7  0x00007fff86439fed in unexpected_defaults_to_terminate ()
#8  0x00007fff8643a040 in __cxxabiv1::__unexpected ()
#9  0x00007fff8643aefe in __cxa_call_unexpected ()
#10 0x0000000100008cfb in exr::ReadEXR (pixelBuffer=@0x7fff5fbfee00, is=@0x7fff5fbfeef8) at /Users/jon/Development/compressor/compressor/exr.cpp:47
#11 0x0000000100001c39 in main (argc=4, argv=0x7fff5fbffaa8) at /Users/jon/Development/compressor/compressor/main.cpp:79

我真的希望OpenEXR阻塞线程，直到有更多的数据可用，但如果有一些方法可以手动检查是否有更多的数据可以做，只要它有一定的健壮性。

谢谢。

Answer 1

这个问题的解决方案实际上是扩展Imf::Istream，并将其实现为在输入管道枯竭时阻塞。

对于这个特定的问题，需要做一些考虑，比如管道是找不到的，也不知道它们的位置，但是它们可以解决。