From: Vinod Koul <vinod.koul@intel.com>
To: Chemsi Mehdi <chmsmehdi@gmail.com>
Cc: alsa-devel@alsa-project.org
Subject: Re: How does ALSALIB commuciates with low level kernel API
Date: Mon, 20 Jun 2016 23:13:52 +0530 [thread overview]
Message-ID: <20160620174352.GV16910@localhost> (raw)
In-Reply-To: <CAHkWnPYuUgrARoMDHjg-0vSKVfz7x6tfh9cpzoEHzvEs+cvUKA@mail.gmail.com>
On Wed, Jun 15, 2016 at 12:12:24AM +0100, Chemsi Mehdi wrote:
> Dear experts,
>
> I am too new in ALSA, trying to read a little bit and understand.
> I want to underatnd how ALSA userspace API calls kernel space code ?
> for example when I call snd_pcm_open() which code is called in kernel
> sound code ?
easist would be to start gdb on alsa-lib snd_pcm_open() and start tracing
the steps.
> and how the link is made ? via IOCTL/write ?
IOCTL, see sound/core/pcm_native.c on kernel side..
--
~Vinod
prev parent reply other threads:[~2016-06-20 17:37 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-06-14 23:12 How does ALSALIB commuciates with low level kernel API Chemsi Mehdi
2016-06-15 7:00 ` Clemens Ladisch
2016-06-20 17:43 ` Vinod Koul [this message]
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20160620174352.GV16910@localhost \
--to=vinod.koul@intel.com \
--cc=alsa-devel@alsa-project.org \
--cc=chmsmehdi@gmail.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.