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"""OpenAL AL and ALC wrapper using ctypes""" |
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import os |
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import sys |
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import ctypes |
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import warnings |
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from ctypes.util import find_library |
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__all__ = ["get_dll_file", "version_info"] |
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def _findlib(libnames, path=None): |
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"""Internal helper function to find the requested DLL(s).""" |
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platform = sys.platform |
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if platform in ("win32", "cli"): |
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suffix = ".dll" |
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elif platform == "darwin": |
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suffix = ".dylib" |
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else: |
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suffix = ".so" |
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searchfor = libnames |
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if type(libnames) is dict: |
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# different library names for the platforms |
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if platform == "cli" and platform not in libnames: |
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# if not explicitly specified, use the Win32 libs for IronPython |
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platform = "win32" |
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if platform not in libnames: |
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platform = "DEFAULT" |
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searchfor = libnames[platform] |
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results = [] |
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if path: |
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for libname in searchfor: |
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dllfile = os.path.join(path, "%s%s" % (libname, suffix)) |
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if os.path.exists(dllfile): |
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results.append(dllfile) |
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for libname in searchfor: |
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dllfile = find_library(libname) |
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if dllfile: |
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results.append(dllfile) |
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return results |
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class _DLL(object): |
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"""Function wrapper around the different DLL functions. Do not use or |
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instantiate this one directly from your user code. |
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""" |
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def __init__(self, libinfo, libnames, path=None): |
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self._dll = None |
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foundlibs = _findlib(libnames, path) |
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if len(foundlibs) == 0: |
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raise RuntimeError("could not find any library for %s" % libinfo) |
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for libfile in foundlibs: |
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try: |
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self._dll = ctypes.CDLL(libfile) |
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self._libfile = libfile |
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break |
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except Exception as exc: |
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# Could not load it, silently ignore that issue and move |
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# to the next one. |
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warnings.warn(exc, ImportWarning) |
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if self._dll is None: |
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raise RuntimeError("could not load any library for %s" % libinfo) |
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if path is not None and sys.platform in ("win32", "cli") and \ |
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path in self._libfile: |
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os.environ["PATH"] += ";%s" % path |
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def bind_function(self, funcname, args=None, returns=None): |
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"""Binds the passed argument and return value types to the specified |
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function.""" |
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func = getattr(self._dll, funcname) |
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func.argtypes = args |
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func.restype = returns |
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return func |
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@property |
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def libfile(self): |
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"""Gets the filename of the loaded library.""" |
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return self._libfile |
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80
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81
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dll = _DLL("OpenAL", {"win32": ["OpenAL", "OpenAL32"], |
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"darwin": ["OpenAL"], |
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"DEFAULT": ["openal", "OpenAL"]}, |
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os.getenv("PYAL_DLL_PATH")) |
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86
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87
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def get_dll_file(): |
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"""Gets the file name of the loaded OpenAL library.""" |
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return dll.libfile |
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__version__ = "0.2.0" |
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version_info = (0, 2, 0, "") |
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explosiveduck /
ed2d
