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From: Jussi Laako <jussi@sonarnerd.net>
To: Andreas Koch <andreas@akdesigninc.com>
Cc: alsa-devel@alsa-project.org, tiwai@suse.de, clemens@ladisch.de,
	Daniel Mack <zonque@gmail.com>,
	demian@auraliti.com, ray@auraliti.com
Subject: Re: [PATCH 2/2] alsa-lib: bring pcm.h and pcm.c in sync with the kernel list
Date: Thu, 28 Mar 2013 09:36:29 +0200	[thread overview]
Message-ID: <5153F2FD.50704@sonarnerd.net> (raw)
In-Reply-To: <7.0.0.16.2.20130327213632.13b07718@akdesigninc.com>

Hi Andreas,> Now of course, with your heroic effort in creating a 
generic driver that
> would help everyone, we have a mess. Some DACs expect little endian
> (mine and others as well) and others (all that are based on Rigisystems
> modules) big endian positions.

OK, we actually have two separate endianess issues here, but only one 
with word lengths longer than 8-bit.

We have the traditional byte order endianess and the bit order 
endianess. Of course from computer point of view order of bits in a byte 
is sort of separate issue. And now the two file formats used for DSD use 
opposite bit ordering, but being byte-based don't have the byte ordering 
issue. At worst we have four different sample format possibilities for 
word lengths longer than a byte...

Either way, application will have to be able to reshuffle the bits for 
the other format.


	- Jussi

  parent reply	other threads:[~2013-03-28  7:36 UTC|newest]

Thread overview: 15+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2013-03-27 23:32 [PATCH 1/2] alsa-lib: pcm.c: fix indentation Daniel Mack
2013-03-27 23:32 ` [PATCH 2/2] alsa-lib: bring pcm.h and pcm.c in sync with the kernel list Daniel Mack
2013-03-27 23:45   ` Jussi Laako
     [not found]     ` <7.0.0.16.2.20130327213632.13b07718@akdesigninc.com>
2013-03-28  7:36       ` Jussi Laako [this message]
2013-03-28  7:49         ` Jussi Laako
2013-03-28  9:54         ` Daniel Mack
2013-03-28  9:52       ` Daniel Mack
2013-04-05  7:45       ` Daniel Mack
     [not found]         ` <7.0.0.16.2.20130405092937.144d10d0@akdesigninc.com>
2013-04-05 20:48           ` Jussi Laako
2013-04-05 20:53             ` Jussi Laako
2013-04-06 11:29               ` Daniel Mack
2013-04-06 17:52                 ` Jussi Laako
2013-04-06 17:58                   ` Daniel Mack
2013-04-06 21:48                     ` Jussi Laako
  -- strict thread matches above, loose matches on Subject: below --
2013-04-18  8:37 [PATCH 1/2] alsa-lib: pcm.c: fix indentation Daniel Mack
2013-04-18  8:37 ` [PATCH 2/2] alsa-lib: bring pcm.h and pcm.c in sync with the kernel list Daniel Mack

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