Hide messages from PortAudio on stdout/stderr about python-sounddevice HOT 2 CLOSED

I didn't find a way to redirect the output for all PortAudio calls but still leave stderr working for other uses within Python.

It seems to work by running this before each PortAudio call:

devnull = os.open(os.devnull, os.O_WRONLY)
old_stderr = os.dup(2)
sys.stderr.flush()
os.dup2(devnull, 2)
os.close(devnull)

... and this immediately afterwards (ideally, in a with statement):

os.dup2(old_stderr, 2)
os.close(old_stderr)

However, I'm not sure if I want to add this overhead to every single PortAudio call.

Any comments?

from python-sounddevice.

I found a different way, but this doesn't work on Windows (and probably Solaris), because there is no symbol named stderr.

On Linux, this works fine:

Add this to the _ffi.cdef() call:

/* from stdio.h */
FILE* fopen(const char* path, const char* mode);
FILE* stderr;

And then add this just before loading the PortAudio library:

# Ignore stderr messages from PortAudio
stdio = _ffi.dlopen(None)
stdio.stderr = stdio.fopen(_os.devnull.encode(), b'w')

This directly overwrites the stderr file stream, which doesn't affect Python's sys.stderr at all.
Therefore, there is no need to undo the redirection in the end.

from python-sounddevice.