From: Chemsi Mehdi <chmsmehdi@gmail.com>
To: Vinod Koul <vinod.koul@intel.com>, alsa-devel@alsa-project.org
Subject: Is snd_pcm_hw_constraint_mask64 really needed ?
Date: Thu, 9 Mar 2017 17:23:46 +0100 [thread overview]
Message-ID: <CAHkWnPZu3a5WdsXzF8_faxdoYPOuSgcqkAu3tX_EL4VCczqYqw@mail.gmail.com> (raw)
Dear ALSA expert ,
I am working with an alsa codec driver where the driver is calling
err = snd_pcm_hw_constraint_mask64(substream->runtime,
SNDRV_PCM_HW_PARAM_FORMAT, formats);
my driver is already setting format before that so I wonder why this
function is called?
Looks like it is needed to add audio constraints to substreams at
open/startup time, but why ?
what can be the issue if I do not call it ?
Please explain to me Takashi.
Thanks a lot in advance.
next reply other threads:[~2017-03-09 16:23 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-03-09 16:23 Chemsi Mehdi [this message]
2017-03-12 1:24 ` Is snd_pcm_hw_constraint_mask64 really needed ? Takashi Sakamoto
2017-03-13 9:06 ` Chemsi Mehdi
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=CAHkWnPZu3a5WdsXzF8_faxdoYPOuSgcqkAu3tX_EL4VCczqYqw@mail.gmail.com \
--to=chmsmehdi@gmail.com \
--cc=alsa-devel@alsa-project.org \
--cc=vinod.koul@intel.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 a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).