From: Sam Hawkens <Sam.Hawkens@freenet.de>
To: alsa-devel@alsa-project.org
Subject: Re: SPDIF receiver with dynamically changing sample rate
Date: Sun, 13 Nov 2011 04:53:13 +0100 [thread overview]
Message-ID: <4EBF3F29.2090107@freenet.de> (raw)
Am 12.11.2011 16:36, schrieb Clemens Ladisch:
> Most drivers ignore the rate requested by the application and return the samples
> as they come from the input. Only the AK411* drivers monitor the rate and stop
> the stream on changes.
OK, so that should work.
>> If yes, how can the application notice the change in sample rate?
> This is usually not possible without measuring the rate at which samples arrive.
> However, you could check the declared rate of the sender by monitoring the
> channel status bits.
OK, so this could be a solution as long as the SPDIF stream carries correct channel stauts information (which is not alway the case). Still a good idea.
Some SPDIF receivers have an interrupt output that can be configured to be asserted when sample rate changes. With a custom hardware design that's another option in addition to the available ALSA features.
Thanx a lot for the good advice!
Regards,
Sam
next reply other threads:[~2011-11-13 3:55 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-11-13 3:53 Sam Hawkens [this message]
-- strict thread matches above, loose matches on Subject: below --
2011-11-12 12:39 SPDIF receiver with dynamically changing sample rate Sam Hawkens
2011-11-12 15:36 ` Clemens Ladisch
[not found] ` <4EBEF2C1.2000408@freenet.de>
2011-11-13 6:43 ` Clemens Ladisch
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