From: sylvain.bertrand@gmail.com
To: alsa-devel@alsa-project.org
Subject: sw_params for a direct-ed(dmix) hw pcm
Date: Wed, 25 Mar 2020 17:44:19 +0000 [thread overview]
Message-ID: <20200325174419.GA1224@freedom> (raw)
In-Reply-To: <20200321155303.GB357@freedom>
Hi,
On this issue, I am doing something fundamentaly wrong, but I don't see how to
do it right.
While configuring a pcm, I should not use sw_params if it is a "direct-ed"
(direct::dmix) real hw pcm: in pcm_direct.c, snd_pcm_direct_sw_params
function is empty and it seems coherent with the fact the real hw pcm is
actually shared and was probably already configured.
How do I know a pcm is actually a "pipeline" of pcms which ends up with a
"direct-ed" real hw pcm? That would tell my code how to behave regarding
sw_params usage.
Is this related to the "topology" and "ucm" apis?
regards,
--
Sylvain
next prev parent reply other threads:[~2020-03-25 17:45 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-03-21 15:53 monotonic raw setup seems buggy sylvain.bertrand
2020-03-25 17:44 ` sylvain.bertrand [this message]
2020-03-26 12:02 ` sw_params for a direct-ed(dmix) hw pcm Kai Vehmanen
2020-03-26 14:36 ` Jaroslav Kysela
2020-03-26 20:04 ` sylvain.bertrand
2020-03-27 8:08 ` Takashi Iwai
2020-03-27 9:40 ` Jaroslav Kysela
2020-03-28 18:26 ` sylvain.bertrand
2020-03-28 19:15 ` Pierre-Louis Bossart
2020-03-28 20:37 ` sylvain.bertrand
2020-03-28 21:34 ` Pierre-Louis Bossart
2020-03-28 22:20 ` sylvain.bertrand
2020-03-29 7:43 ` Takashi Iwai
2020-03-31 11:32 ` Takashi Iwai
2020-04-01 15:25 ` sylvain.bertrand
2020-04-01 15:59 ` Takashi Iwai
2020-04-01 20:21 ` sylvain.bertrand
2020-04-02 19:03 ` sylvain.bertrand
2020-04-06 13:49 ` sylvain.bertrand
2020-04-14 15:18 ` Takashi Iwai
2020-04-14 23:20 ` sylvain.bertrand
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