[Python-Dev] [Python-3000] Finishing up PEP 3108

[Quentin Gallet-Gilles]

I've uploaded a patch for the aifc module (http://bugs.python.org/issue2847).
I'm still working on the testsuite.
Comments are welcome!

Quentin

On Thu, May 29, 2008 at 5:39 PM, Quentin Gallet-Gilles <qgallet at gmail.com>
wrote:

>
> On Thu, May 29, 2008 at 4:56 PM, Lars Immisch <lars at ibp.de> wrote:
>
>> <snip>
>>
>>>        Issue 2847 - the aifc module still imports the cl module in 3.0.
>>>        Problem is that the cl module is gone. =) So it seems silly to
>>> have
>>>        the imports lying about. This can probably be changed to critical.
>>>
>>>
>>>    It shouldn't be a problem to rip everything cl-related out of aifc.
>>>    The question is how useful aifc will be after that ...
>>>
>>>
>>> Has someone already used that module ? I took a look into it, but I'm a
>>> bit confused about the various compression types, case-sensitivity and
>>> compatibility issues [1]. Are Apple's "alaw" and SGI's "ALAW" really the
>>> same encoding ? Can we use the audioop module for ALAW, just like it's
>>> already done for ULAW ?
>>>
>>
>> There is just one alaw I've ever come across (G.711), and the audioop
>> implementation could be used (audioop's alaw support is younger than the
>> aifc module, BTW)
>>
>> The capitalisation is confusing, but your document [1] says: "Apple
>> Computer's QuickTime player recognize only the Apple compression types.
>> Although "ALAW" and "ULAW" contain identical sound samples to the "alaw" and
>> "ulaw" formats and were in use long before Apple introduced the new codes,
>>  QuickTime does not recognize them."
>>
>> So this seems just a matter of naming in the AIFC, but not a matter of two
>> different alaw implementations.
>>
>> - Lars
>>
>
> Ok, I'll handle this issue. I'll be using the audioop implementation as a
> replacement of the SGI compression library. I'll also create a test suite,
> as Brett mentioned in the bug tracker the module was missing one.
>
> Quentin
>
>
>>
>> [1] http://www-mmsp.ece.mcgill.ca/Documents/AudioFormats/AIFF/AIFF.html
>>
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.python.org/pipermail/python-dev/attachments/20080602/b5b4be23/attachment.htm>