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Wave.py support for ulaw and alaw audio #43330

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ewoudenberg mannequin opened this issue May 7, 2006 · 7 comments
Closed

Wave.py support for ulaw and alaw audio #43330

ewoudenberg mannequin opened this issue May 7, 2006 · 7 comments
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3.12 bugs and security fixes stdlib Python modules in the Lib dir type-feature A feature request or enhancement

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@ewoudenberg
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ewoudenberg mannequin commented May 7, 2006

BPO 1483545
Nosy @amauryfa, @serhiy-storchaka
Files
  • wave.py_unified_diff.zip: unified diff from Lib/wave.py (At revision: 45934) to a wave.py with ulaw/alaw support
  • wave24.py: Wave.py from python 2.4 with patch applied
  • wave25.py: Wave.py from python 2.5 with patch applied
  • wave.py: Wave.py from python 2.7 with patch applied
  • test_wave.py: test_wave.py with added tests for ulaw and alaw format files.
    		•

    Note: these values reflect the state of the issue at the time it was migrated and might not reflect the current state.

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    GitHub fields:

    assignee = None
closed_at = None
created_at = <Date 2006-05-07.23:23:39.000>
labels = ['type-feature', 'library']
title = 'Wave.py support for ulaw and alaw audio'
updated_at = <Date 2014-08-25.07:32:51.887>
user = 'https://bugs.python.org/ewoudenberg'

    bugs.python.org fields:

    activity = <Date 2014-08-25.07:32:51.887>
actor = 'ewoudenberg'
assignee = 'none'
closed = False
closed_date = None
closer = None
components = ['Library (Lib)']
creation = <Date 2006-05-07.23:23:39.000>
creator = 'ewoudenberg'
dependencies = []
files = ['7234', '13931', '13932', '36465', '36466']
hgrepos = []
issue_num = 1483545
keywords = ['patch']
message_count = 5.0
messages = ['50204', '87462', '87463', '87499', '199865']
nosy_count = 3.0
nosy_names = ['amaury.forgeotdarc', 'ewoudenberg', 'serhiy.storchaka']
pr_nums = []
priority = 'normal'
resolution = None
stage = 'needs patch'
status = 'open'
superseder = None
type = 'enhancement'
url = 'https://bugs.python.org/issue1483545'
versions = ['Python 2.7']
    @ewoudenberg
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    ewoudenberg mannequin commented May 7, 2006

    Dear Python Patch Center:

    This is my first Python patch submission. Apologies for
    any errors of protocol. I have been using these
    submitted changes for several years and have even given
    it out (I mentioned it a few years back on a python
    mailing list.) I am confident to the best of my ability
    that these changes are solid.

    Unfortunately I don't have the capability of rebuilding
    the documentation, but the changes to the documentation
    are outlined below.

    Please do not hesitate to contact me for further
    information or assistance. I would be honored to have
    these changes become part of some Python revision, be
    it 2.5 or something further in the future.

    Thank you,
    Eric Woudenberg
    eaw@connact.com

    From my version of the wave.py file:

    These changes allow .wav files containing u-law and
    a-law data to be read and written. The user visible
    changes are:

    1. After a .wav file containing mu-law or a-law data is
      opened for reading, a call to getcomptype() returns
      'ULAW' (resp. 'ALAW') and a call to getcompname()
      returns 'CCITT G.711 u-law' (resp. 'CCITT G.711 a-law').

    2. After a wave object is created for writing,
      setcomptype() can be called with the arguments ('ULAW',
      'CCITT G.711 u-law') (resp. 'ALAW', 'CCITT G.711
      a-law'). The second argument (text description) is ignored.

    3. The comptype 'PCM' is now a synonym for 'NONE'.
      PCM-containing wave files will return 'PCM' instead of
      'NONE' for their comptype.

    Note that this module does not do any u-law or a-law
    format conversion to PCM, it simply allows users to
    read or write u-law/a-law data from/to .wav files that
    have conforming headers. For audio conversion of PCM
    data to or from u-law, use the audioop module.

    @ewoudenberg ewoudenberg mannequin added stdlib Python modules in the Lib dir labels May 7, 2006
    @gpolo gpolo mannequin added type-feature A feature request or enhancement labels Jan 12, 2009
    @ewoudenberg
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    ewoudenberg mannequin commented May 8, 2009

    Patch applied to Python 2.4 wave.py

    @ewoudenberg
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    ewoudenberg mannequin commented May 8, 2009

    Patch applied to Python 2.5 wave.py

    @amauryfa
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    amauryfa commented May 9, 2009

    Please read http://www.python.org/dev/patches/
    The best format for a patch is a "diff -u" format. It's much much easier
    to see what you changed to the existing code, and the same patch often
    applies to several versions.
    Also, 2.4 and 2.5 are closed for new developments - your changes would
    only go to a 2.7 version.

    And your change is more likely to be accepted if it contains unit tests
    (in Lib/test/test_wave.py)

    @serhiy-storchaka
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    For consistency with the aifc and sunau modules the wave module should compress/uncompress u-law and A-law data.

    @ezio-melotti ezio-melotti transferred this issue from another repository Apr 10, 2022
    @AA-Turner AA-Turner added pending The issue will be closed if no feedback is provided 3.12 bugs and security fixes labels Jun 7, 2022
    @AA-Turner
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    These patches are targetting Python 2.7 and earlier so I would be surprised if they apply today -- I'd sugest closing this issue.

    A

    @kumaraditya303
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    A new issue targeting main branch can be created if desired, also the patch would have to be a PR not a diff.

    @kumaraditya303 kumaraditya303 closed this as not planned Won't fix, can't repro, duplicate, stale Jun 18, 2022
    @AA-Turner AA-Turner removed the pending The issue will be closed if no feedback is provided label Jun 19, 2022
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