From: Jussi Laako <jussi@sonarnerd.net>
To: Daniel Mack <zonque@gmail.com>
Cc: alsa-devel@alsa-project.org, tiwai@suse.de, clemens@ladisch.de,
demian@auraliti.com, ray@auraliti.com,
Andreas Koch <andreas@akdesigninc.com>
Subject: Re: [PATCH 2/2] alsa-lib: bring pcm.h and pcm.c in sync with the kernel list
Date: Sat, 06 Apr 2013 20:52:01 +0300 [thread overview]
Message-ID: <516060C1.9000101@sonarnerd.net> (raw)
In-Reply-To: <5160072E.8020500@gmail.com>
> All audio formats are specified in *bytes* for sample and buffer sizes,
> so we will also keep it that way for DSD.
Umm, IIRC, all the ALSA PCM API snd_pcm_*_period_size() stuff is in
number of frames? (number of samples per channel) Thus size of the
buffer is period size * sample size * channels (* nperiods). So if we
would use 2.8 MHz as sampling rate for DSD, then buffer size would be
period size * 1/8 * channels, since one sample of DSD is eight' of a byte.
And sampling rate is number of frames per second. So it is quite clear
and non-confusing.
next prev parent reply other threads:[~2013-04-06 17:52 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-03-27 23:32 [PATCH 1/2] alsa-lib: pcm.c: fix indentation Daniel Mack
2013-03-27 23:32 ` [PATCH 2/2] alsa-lib: bring pcm.h and pcm.c in sync with the kernel list Daniel Mack
2013-03-27 23:45 ` Jussi Laako
[not found] ` <7.0.0.16.2.20130327213632.13b07718@akdesigninc.com>
2013-03-28 7:36 ` Jussi Laako
2013-03-28 7:49 ` Jussi Laako
2013-03-28 9:54 ` Daniel Mack
2013-03-28 9:52 ` Daniel Mack
2013-04-05 7:45 ` Daniel Mack
[not found] ` <7.0.0.16.2.20130405092937.144d10d0@akdesigninc.com>
2013-04-05 20:48 ` Jussi Laako
2013-04-05 20:53 ` Jussi Laako
2013-04-06 11:29 ` Daniel Mack
2013-04-06 17:52 ` Jussi Laako [this message]
2013-04-06 17:58 ` Daniel Mack
2013-04-06 21:48 ` Jussi Laako
-- strict thread matches above, loose matches on Subject: below --
2013-04-18 8:37 [PATCH 1/2] alsa-lib: pcm.c: fix indentation Daniel Mack
2013-04-18 8:37 ` [PATCH 2/2] alsa-lib: bring pcm.h and pcm.c in sync with the kernel list Daniel Mack
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