From: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
To: Takashi Iwai <tiwai@suse.de>
Cc: alsa-devel@alsa-project.org
Subject: Re: [PATCH 1/2] ALSA: usb-audio: ignore delay calculation for capture stream
Date: Mon, 26 Nov 2012 15:05:45 -0600 [thread overview]
Message-ID: <50B3D9A9.1000702@linux.intel.com> (raw)
In-Reply-To: <s5hr4ngh1u1.wl%tiwai@suse.de>
>>> It doesn't make sense to calculate the delay for capture streams in
>>> the current implementation. It's always zero, so we should skip the
>>> computation in snd_usb_pcm_pointer() in the case of capture.
>>
>> Shouldn't we add support for delay on the capture path instead? We could
>> use the same frame counter to report the delay and resync when the urb
>> is retired.
>
> Sure, it must be possible like that way.
> Wouldn't you like to volunteer? ;)
Sounds like a good skunkworks for the end of the year...If we have both
HDA and USB behaving correctly on delays, this would raise the bar for
everyone.
next prev parent reply other threads:[~2012-11-26 21:05 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-11-23 15:21 [PATCH 0/2] Fix usb-audio delay calculation Takashi Iwai
2012-11-23 15:21 ` [PATCH 1/2] ALSA: usb-audio: ignore delay calculation for capture stream Takashi Iwai
2012-11-26 14:24 ` Pierre-Louis Bossart
2012-11-26 14:32 ` Takashi Iwai
2012-11-26 21:05 ` Pierre-Louis Bossart [this message]
2012-12-10 21:33 ` Pierre-Louis Bossart
2012-12-12 11:26 ` Takashi Iwai
2012-11-23 15:21 ` [PATCH 2/2] ALSA: usb-audio: fix delay account during pause Takashi Iwai
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