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From: Patrick Lai <plai@codeaurora.org>
To: alsa-devel <alsa-devel@alsa-project.org>
Subject: Query about  SNDRV_PCM_FORMAT_S24_LE
Date: Thu, 28 Feb 2013 00:08:46 -0800	[thread overview]
Message-ID: <512F108E.20904@codeaurora.org> (raw)

Hi,

The DSP I am working with currently supports 24-bit PCM sample in
32-bit data space but with LSB padded. Based on the discussion I found
on line, SNDRV_PCM_FORMAT_S24_LE is defined to be 24-bit PCM sample in
32-bit data space with MSB padded. Also, there is no format macro
defined for the format which my DSP supports. Please correct me if I am
wrong. Furthermore, which software layer in audio stack of a typical
linux distribution such as ubuntu handles the padding. I don't think
it's handled by the alsa library. Does application or pulseaudio handle
the padding? I would think it's done in pulseaudio. I have not study
pulseaudio codec extensively but would think someone on the mailing
list can give a quick answer.

Thanks
Patrick
-- 
Sent by an employee of the Qualcomm Innovation Center, Inc.
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum.

             reply	other threads:[~2013-02-28  8:08 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2013-02-28  8:08 Patrick Lai [this message]
2013-02-28  8:45 ` Query about SNDRV_PCM_FORMAT_S24_LE Takashi Iwai

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