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Date: Tue, 18 Mar 2014 15:32:18 -0400
From: Christopher Faylor <cgf-use-the-mailinglist-please AT cygwin DOT com>
To: cygwin AT cygwin DOT com
Subject: Re: sox - package is broken
Message-ID: <20140318193218.GA4530@ednor.casa.cgf.cx>
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On Tue, Mar 18, 2014 at 07:29:14PM +0000, David Stacey wrote:
>On 18/03/2014 17:53, Christopher Faylor wrote:
>> On Mon, Mar 17, 2014 at 11:53:10PM +0000, David Stacey wrote:
>>> On 17/03/2014 04:42, Christopher Faylor wrote:
>>>> On Sun, Mar 16, 2014 at 10:28:29PM -0400, Christopher Faylor wrote:
>>>>> On Sun, Mar 16, 2014 at 09:57:36PM -0400, Christopher Faylor wrote:
>>>>>> On Sun, Mar 16, 2014 at 10:36:31PM +0000, David Stacey wrote:
>>>>>>> The issue I have is that close_audio_out() isn't working as you'd
>>>>>>> expect: for some reason, the 'audio_out_' member pointer is null
>>>>>> This was because all of the I/O operations were ignoring the archetype
>>>>>> for the device.  So, this is likely an old bug.
>>>>>>
>>>>>> So, good news/bad news.  Good news: I checked in a fix which causes the missing
>>>>>> 1.5 seconds to be played.  Bad news: The process now hangs in waveOutClose()
>>>>>> in fhandler_dev_dsp::Audio_out::stop.  There seem to be a few threads hanging
>>>>>> around waiting for something so obviously something isn't cleaning up right
>>>>>> in the audio code.
>>>>> Nope.  Wrong theory.  I know what's causing this but I don't yet know how to
>>>>> fix it.
>>>> This should all be fixed in the upcoming snapshot.
>>> Thank you for looking at this. I've tried the 32-bit snapshot dated
>>> '2014-03-17', but whenever I pipe a wav file to /dev/dsp I get a
>>> segmentation fault. The error is produced immediately, and no sound is
>>> heard. I've tried wav files both longer and shorter than 1.5s.
>> What does "pipe a wav file" mean?  I was testing this by doing:
>>
>> cp h.wav /dev/dsp
>
>I was testing with
>
>     cat ding.wav > /dev/dsp
>
>This gives a segmentation fault with the latest (2014-03-18) snapshot; 
>no sound is heard However, if I repeat your test:
>
>     cp ding.wav /dev/dsp
>
>Then that works and the ding dings. Which confuses me greatly - I've 
>been using *nix for nearly 20 years, and I honestly would have said that 
>the two lines above were synonymous - they're obviously not!

Ok.  I see a SEGV with "cat >".  Investigating.

FWIW, they are not the same.  There's lots of dup'ing going on under
the hood with "cat >".

cgf

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