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From: Robin Gareus <robin@gareus.org>
To: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Cc: tiwai@suse.de, alsa-devel@alsa-project.org, clemens@ladisch.de,
	ffado-devel@lists.sf.net, Damien Zammit <damien.zammit@gmail.com>
Subject: Re: [PATCH 11/11] ALSA: digi00x: apply double-oh-three algorism to multiplex PCM samples
Date: Thu, 19 Mar 2015 14:59:59 +0100	[thread overview]
Message-ID: <550AD65F.10803@gareus.org> (raw)
In-Reply-To: <5508CFA5.7060903@sakamocchi.jp>

On 03/18/2015 02:06 AM, Takashi Sakamoto wrote:
> 
> 
> On 2015年03月17日 22:49, Damien Zammit wrote:
>> Can we include my mixer control into the driver?
> 
> Depends on the reason.
> 
>> I think it is important to include the clock source selector switch as
>> an alsamixer setting.
> 
> Please explain the importance, especially the reason to include the
> selector into kernel code instead of userspace application.

Can one access the device from userspace while the kernel is using it to
stream audio or midi ("Device or resource busy") ?

This is one of the reasons, why USB soundcards expose all settings
though the alsa mixer interface. It also offers a standardized interface
for userspace apps to build on top and a method to directly link mixer
to soundcard for systems with multiple soundcards.

How do you envisage to handle this?

2c,
robin

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  parent reply	other threads:[~2015-03-19 14:00 UTC|newest]

Thread overview: 40+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-03-15 16:00 [RFC][PATCH 00/11] digi00x: new driver for Digidesign 002/003 family Takashi Sakamoto
2015-03-15 16:00 ` [PATCH 01/11] ALSA: digi00x: add skelton for Digi 002/003 device driver Takashi Sakamoto
2015-03-15 16:01 ` [PATCH 02/11] ALSA: digi00x: add streaming functionality Takashi Sakamoto
2015-03-15 16:01 ` [PATCH 03/11] ALSA: digi00x: add proc node for clock status Takashi Sakamoto
2015-03-15 16:01 ` [PATCH 04/11] ALSA: digi00x: add PCM functionality Takashi Sakamoto
2015-03-15 16:01 ` [PATCH 05/11] ALSA: digi00x: add MIDI functionality Takashi Sakamoto
2015-03-15 16:01 ` [PATCH 06/11] ALSA: digi00x: add hwdep interface Takashi Sakamoto
2015-03-15 16:01 ` [PATCH 07/11] ALSA: digi00x: support unknown asynchronous message Takashi Sakamoto
2015-03-15 16:01 ` [PATCH 08/11] ALSA: digi00x: support MIDI ports for device control Takashi Sakamoto
2015-03-15 16:01 ` [PATCH 09/11] ALSA: firewire-lib: allows to implement external MIDI callback function Takashi Sakamoto
2015-03-15 16:01 ` [PATCH 10/11] digi00x: improve MIDI capture/playback Takashi Sakamoto
2015-03-15 16:01 ` [PATCH 11/11] ALSA: digi00x: apply double-oh-three algorism to multiplex PCM samples Takashi Sakamoto
2015-03-16 11:39   ` Damien Zammit
2015-03-16 13:24     ` Takashi Sakamoto
2015-03-16 14:25   ` Robin Gareus
2015-03-16 16:25     ` Takashi Sakamoto
2015-03-16 17:13       ` Robin Gareus
2015-03-16 22:47         ` Takashi Sakamoto
2015-03-17 13:37           ` Robin Gareus
2015-03-17 13:49             ` Damien Zammit
2015-03-18  1:06               ` Takashi Sakamoto
2015-03-19  5:18                 ` Damien Zammit
2015-03-19 13:59                 ` Robin Gareus [this message]
2015-03-19 22:46                   ` Takashi Sakamoto
2015-03-19 22:51                     ` Takashi Sakamoto
2015-03-20 12:05                     ` firewire mixer interface -- was " Robin Gareus
2015-03-20 13:00                       ` Clemens Ladisch
2015-03-20 13:25                       ` Takashi Sakamoto
2015-03-20 13:35                         ` Takashi Iwai
2015-03-20 13:51                           ` Takashi Sakamoto
2015-03-20 14:13                             ` Takashi Iwai
2015-03-20 14:45                               ` Takashi Sakamoto
2015-03-20 15:01                                 ` Takashi Iwai
2015-03-21  5:59                                   ` Damien Zammit
2015-03-22  2:55                                     ` Takashi Sakamoto
2015-03-22  5:56                                       ` [FFADO-devel] " Jonathan Woithe
2015-03-24  3:15                                       ` Robin Gareus
2015-03-20 13:55                         ` Damien Zammit
2015-03-20 14:07                           ` Clemens Ladisch
2015-03-22  6:11                       ` [FFADO-devel] " Jonathan Woithe

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