From: Timur Tabi <timur@freescale.com>
To: Takashi Iwai <tiwai@suse.de>
Cc: alsa-devel@alsa-project.org
Subject: Re: How does ALSA detect underrun in OSS emulation?
Date: Mon, 25 Feb 2008 09:38:38 -0600 [thread overview]
Message-ID: <47C2E0FE.2020207@freescale.com> (raw)
In-Reply-To: <s5hhcfxt5ih.wl%tiwai@suse.de>
Takashi Iwai wrote:
> It's just as same as on ALSA native API, checks the validity of the
> current position reported by pointer callback in
> snd_pcm_period_elapsed().
Are you talking about this code in snd_pcm_update_hw_ptr_pos?
pos = substream->ops->pointer(substream);
if (pos == SNDRV_PCM_POS_XRUN)
return pos; /* XRUN */
What if my 'pointer' function never returns SNDRV_PCM_POS_XRUN? How else can I
get an underrun detected?
--
Timur Tabi
Linux kernel developer at Freescale
next prev parent reply other threads:[~2008-02-25 15:38 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-02-25 15:22 How does ALSA detect underrun in OSS emulation? Timur Tabi
2008-02-25 15:33 ` Takashi Iwai
2008-02-25 15:38 ` Timur Tabi [this message]
2008-02-25 15:45 ` Takashi Iwai
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