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From: Rob Duncan <rduncan@tesla.com>
To: alsa-devel@alsa-project.org
Subject: snd_pcm_ioplug_avail_update() confusion
Date: Tue, 17 Oct 2017 23:03:57 -0700	[thread overview]
Message-ID: <dw77emh8ux0z76.fsf@tesla.com> (raw)

I'm working on an external IO plugin based on ioplug and I'm confused
about the behavior of snd_pcm_ioplug_avail_update().  Specifically this
call (src/pcm/pcm_ioplug.c:657):

    result = io->data->callback->transfer(io->data, areas, offset, size);

Why isn't there a subsequent call to snd_pcm_mmap_appl_forward() like
there is in ioplug_priv_transfer_areas()?  It seems that without such a
call the captured data will be lost, or have I missed something?

Thanks,

Rob.

             reply	other threads:[~2017-10-18  6:04 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-10-18  6:03 Rob Duncan [this message]
2017-10-24 19:50 ` snd_pcm_ioplug_avail_update() confusion Takashi Iwai

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