From: Clemens Ladisch <clemens@ladisch.de>
To: alsa-devel@alsa-project.org
Subject: Re: safe support for rewind in ALSA
Date: Thu, 11 Feb 2010 08:20:53 +0100 [thread overview]
Message-ID: <4B73AFD5.4080205@ladisch.de> (raw)
In-Reply-To: <4f3252891002102252vb6d7a94l76fb78e33da37775@mail.gmail.com>
Raymond Yau wrote:
> Are the one period per buffer designed for specific purpose such as
> playing/looping the pre-loaded soundfont ?
No, it's just a consequence of how the card's DMA controller is designed.
> Other than pulseaudio , are there any application use this mode properly
> without glitch ?
The number of periods has nothing to do with glitching.
> Do you mean that PA only wake up once when configure sound card to use two
> periods per buffer ?
When using two periods per buffer, ALSA tries to wake up PA two times.
However, PA ignores the sound card's interrupts and is woken up by its
own timer.
Regards,
Clemens
next prev parent reply other threads:[~2010-02-11 7:20 UTC|newest]
Thread overview: 40+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-02-01 17:20 safe support for rewind in ALSA pl bossart
2010-02-01 18:00 ` Jaroslav Kysela
2010-02-01 22:40 ` pl bossart
2010-02-03 2:20 ` Raymond Yau
2010-02-03 18:03 ` Kai Vehmanen
2010-02-03 20:52 ` Kai Vehmanen
2010-02-03 22:57 ` pl bossart
2010-02-08 1:22 ` Raymond Yau
2010-02-02 2:53 ` Raymond Yau
2010-02-06 11:59 ` Raymond Yau
2010-02-17 15:30 ` Lennart Poettering
2010-02-18 1:31 ` Raymond Yau
2010-02-18 2:33 ` Lennart Poettering
2010-02-18 3:21 ` Raymond Yau
2010-02-01 18:01 ` Mark Brown
2010-02-01 18:05 ` Jaroslav Kysela
2010-02-01 21:28 ` Kai Vehmanen
2010-02-01 21:54 ` Kai Vehmanen
2010-02-08 22:59 ` Raymond Yau
2010-02-09 20:54 ` Kai Vehmanen
2010-02-10 13:19 ` Raymond Yau
2010-02-10 13:36 ` Clemens Ladisch
2010-02-11 6:52 ` Raymond Yau
2010-02-11 7:20 ` Clemens Ladisch [this message]
2010-02-11 7:27 ` Jaroslav Kysela
2010-02-15 3:03 ` Raymond Yau
2010-02-17 15:46 ` Lennart Poettering
2010-02-21 10:35 ` Kai Vehmanen
2010-02-22 9:07 ` Raymond Yau
[not found] ` <20100221203500.GH31800@tango.0pointer.de>
2010-02-22 19:15 ` semantics of SNDRV_PCM_INFO_BATCH (was: Re: safe support for rewind in ALSA) Kai Vehmanen
2010-02-23 7:02 ` Raymond Yau
2010-02-23 2:37 ` safe support for rewind in ALSA Raymond Yau
2010-02-23 2:44 ` Raymond Yau
2010-02-17 15:42 ` Lennart Poettering
2010-02-21 10:06 ` Kai Vehmanen
[not found] ` <20100221202144.GG31800@tango.0pointer.de>
2010-05-04 2:31 ` Raymond Yau
2010-02-17 15:39 ` Lennart Poettering
2010-02-17 15:36 ` Lennart Poettering
2010-02-17 15:35 ` Lennart Poettering
2010-02-01 22:10 ` Kai Vehmanen
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