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"""
Copyright 2009-2019 Olivier Belanger
This file is part of pyo, a python module to help digital signal
processing script creation.
pyo is free software: you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as
published by the Free Software Foundation, either version 3 of the
License, or (at your option) any later version.
pyo is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with pyo. If not, see <http://www.gnu.org/licenses/>.
"""
# At first run, found and symlink system's libasound and libjack into
# ~/.pyo/X.X_ARCH/libs.
# At runtime, dlopen them before running any other code so that pyo
# use these libraries instead of those embedded in the wheels (alsa
# and jack just don't work with embedded ones).
import os
import sys
import struct
import ctypes
import pyo
bitdepth = struct.calcsize("P") * 8
version = "%d.%d_%d" % (sys.version_info[0], sys.version_info[1], bitdepth)
userlibdir = os.path.join(os.path.expanduser("~"), ".pyo", version, "libs")
try:
os.makedirs(userlibdir)
except:
pass
libs = os.listdir("{}{}".format(os.path.dirname(pyo.__file__), ".libs"))
withlibasound = withlibjack = False
libasound = libjack = ""
for lib in libs:
if "libasound" in lib:
libasound = os.path.join(userlibdir, lib)
withlibasound = True
if "libjack" in lib:
libjack = os.path.join(userlibdir, lib)
withlibjack = True
# If libdir already exists, we still need to check if the symlinks are the
# good ones. For a new installation, lib files will have different names.
need_symlinks = False
if not os.path.islink(libasound):
need_symlinks = True
if need_symlinks:
libasoundfound = libjackfound = False
libasoundpath = libjackpath = ""
folders = [
"/usr/local/lib",
"/usr/local/lib%d" % bitdepth,
"/usr/lib",
"/usr/lib%d" % bitdepth,
"/lib",
"/lib%d" % bitdepth,
]
for path in folders:
for root, dirs, files in os.walk(path):
for f in files:
if libasound:
if not libasoundfound and "libasound.so" in f:
libasoundpath = os.path.join(root, f)
libasoundfound = True
if libjack:
if not libjackfound and "libjack.so" in f:
libjackpath = os.path.join(root, f)
libjackfound = True
if withlibasound == libasoundfound and withlibjack == libjackfound:
break
break
if withlibasound and libasoundfound:
os.symlink(libasoundpath, libasound)
if withlibjack and libjackfound:
os.symlink(libjackpath, libjack)
# Now, we preload the libraries, before importing _pyo.
if withlibasound:
libasound = ctypes.CDLL(libasound, mode=ctypes.RTLD_GLOBAL)
if withlibjack and os.path.islink(libjack):
libjack = ctypes.CDLL(libjack, mode=ctypes.RTLD_GLOBAL)
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