linux-kernel - Re: [PATCH 1/2] ALSA: aloop: Add support for the non-interleaved access mode

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Date:   Fri, 06 Oct 2023 10:52:21 +0200
From:   Takashi Iwai <tiwai@...e.de>
To:     Ivan Orlov <ivan.orlov0322@...il.com>
Cc:     perex@...ex.cz, tiwai@...e.com, alsa-devel@...a-project.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/2] ALSA: aloop: Add support for the non-interleaved access mode

On Wed, 27 Sep 2023 13:35:54 +0200,
Ivan Orlov wrote:
> 
> The current version of the loopback driver supports interleaved access
> mode only. This patch introduces support for the non-interleaved
> access mode.
> 
> When in the interleaved mode, the 'copy_play_buf' function copies data
> from the playback to the capture buffer using one memcpy call. This call
> copies samples for multiple, interleaved channels.
> 
> In the non-interleaved mode we have multiple channel buffers, so we have
> to perform multiple memcpy calls to copy samples channel after channel.
> 
> Add new function called 'copy_play_buf_part_n', which copies a part of
> each channel buffer from playback to capture. Modify the 'copy_play_buf'
> to use the corresponding memory copy function(just memcpy /
> copy_play_buf_part_n) depending on the access mode.
> 
> Signed-off-by: Ivan Orlov <ivan.orlov0322@...il.com>

Sorry for the late reaction, as I've been (still) off since the last
week.

Now applied both patches.  Thanks.


Takashi