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From: Charles Eidsness <charles.eidsness@ieee.org>
To: alsa-devel@alsa-project.org
Subject: S24_LE Mode for USB Driver
Date: Thu, 07 Aug 2008 16:25:50 -0400	[thread overview]
Message-ID: <489B5A4E.3040903@ieee.org> (raw)

Hi All,

It looks like the parse_audio_format_i_type function at line 2369 of usbaudio.c 
(linux v2.6.23) doesn't support the case where  bSubframeSize (fmt[5]) = 4 bytes 
and  bBitResolution (fmt[6]) = 24 bits, which should correspond to a S24_LE (or 
BE) type. I'm developing a new USD DAC which supports this mode (24-bit sample 
in a 4 byte package). Right now Linux sends me S32_LE formated data, which is 
wrong. Would it be possible to expand this function to support S24_LE/BE? It 
would only require adding a few lines of code.

Thanks!
Charles

             reply	other threads:[~2008-08-07 20:25 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2008-08-07 20:25 Charles Eidsness [this message]
2008-08-13 10:04 ` S24_LE Mode for USB Driver Takashi Iwai
2008-08-13 11:17   ` Clemens Ladisch
2008-08-13 12:27     ` Takashi Iwai
2008-08-13 12:39       ` Charles Eidsness
2008-08-13 12:55         ` Takashi Iwai
2008-08-13 14:15           ` Charles Eidsness

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