pypy

[stuaxo]

Hi, Any idea if this runs in pypy ?

I can install it (using LC_ALL=C pip install pysoundcard) but can't seem to sample any sound with it

Cheers S

[bastibe]

Last time I checked, the only thing missing from Numpypy was np.frombuffer. When I replaced the buffer logic with strings, it worked. According to http://buildbot.pypy.org/numpy-status/latest.html that is supposed to work now.

Are you running the latest version of Numpypy? np.frombuffer is apparently supported since 2.7.6.

Why are you using LC_ALL=C?

[stuaxo]

If I don't use LC_ALL=C I get this weird error (maybe my setup though)

Command /mnt/data/home/stu/.virtualenvs/shoebot-pgi-pypy/bin/pypy -c "import setuptools, tokenize;__file__='/mnt/data/home/stu/.virtualenvs/shoebot-pgi-pypy/build/numpy/setup.py';exec(compile(getattr(tokenize, 'open', open)(__file__).read().replace('\r\n', '\n'), __file__, 'exec'))" install --record /tmp/pip-b1X3aP-record/install-record.txt --single-version-externally-managed --compile --install-headers /mnt/data/home/stu/.virtualenvs/shoebot-pgi-pypy/include/site/python2.7 failed with error code 1 in /mnt/data/home/stu/.virtualenvs/shoebot-pgi-pypy/build/numpy
Traceback (most recent call last):
  File "app_main.py", line 75, in run_toplevel
  File "/mnt/data/home/stu/.virtualenvs/shoebot-pgi-pypy/bin/pip", line 11, in <module>
    sys.exit(main())
  File "/mnt/data/home/stu/.virtualenvs/shoebot-pgi-pypy/site-packages/pip/__init__.py", line 185, in main
    return command.main(cmd_args)
  File "/mnt/data/home/stu/.virtualenvs/shoebot-pgi-pypy/site-packages/pip/basecommand.py", line 161, in main
    text = '\n'.join(complete_log)
UnicodeDecodeError: 'ascii' codec can't decode byte 0xe2 in position 72: ordinal not in range(128)

As I'm doing pip install -u pysoundcard could it be trying to download numpy instead of using numpypy ?

[bastibe]

Can you import numpy in pypy? If so, the setup.py should do the right thing. If not, try changing

install_requires=['numpy',
                  'cffi>=0.6'],

into

install_requires=['numpypy',
                  'cffi>=0.6'],

It could also be worth trying to download pysoundcard and pypy setup.py install directly instead of pip install pysoundcard. That way, you would skip the pip part of the installation, which is where your error message seems to originate from.

Alternatively, try import pysoundcard as a simple file without installing it. This should skip any trouble with pip or setuptools. You need to have cffi and numpy installed for this.

[stuaxo]

I upgraded to pypy 2.4, created a new virtualenv with everything updated + installed pysoundcard by running setup.py install in a checkout of pysoundcard - now I'm getting this, during a call to Stream .read

        with Stream(sample_rate=44100, block_length=16) as s:
            while self.quit is False:
                vec = s.read(NUM_SAMPLES)

  File "/usr/lib/pypy/lib-python/2.7/threading.py", line 806, in __bootstrap_inner
    self.run()
  File "shoebot_code", line 59, in run
  File "/mnt/data/home/stu/.virtualenvs/shoebot-pgi-pypy/site-packages/PySoundCard-0.5.0-py2.7.egg/pysoundcard.py", line 612, in read
    self._handle_error(_pa.Pa_ReadStream(self._stream, data, frames))
NameError: global name 'frames' is not defined

[bastibe]

This is indeed a serious error in pysoundcard. I will fix it tomorrow and add a test case.

If you want to continue working right now, I suspect that line 612 of pysoundcard should say

self._handle_error(_pa.Pa_ReadStream(self._stream, data, num_frames)) # note the *num_*

[stuaxo]

BTW, Did num_frames used to be optional ? My older code seemed to just call stream.read() and was fine.

In other news, that works and my terrible music vis runs a lot faster in pypy.

[stuaxo]

http://imgur.com/a/EMZr8 < basic fft music vis, pysoundcard + shoebot :)

[bastibe]

Indeed, num_frames used to be optional. We figured that it doesn't make sense to read an arbitrary amount of frames though, in particular since read and write are supposed to work similar to the Posix functions.

If you disagree with this, we would be very interested in your opinion and reasoning, since this is very much open to discussion!

Anyway, great to see that PySoundCard works with Pypy! This is fantastic news, and something I have personally waited for quite a while! Also, cool visualization. I like it!