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From: James Courtier-Dutton <James@superbug.demon.co.uk>
To: Takashi Iwai <tiwai@suse.de>
Cc: alsa-devel@lists.sourceforge.net
Subject: Re: problems: flushing during snd_pcm_wait()
Date: Fri, 11 Oct 2002 22:50:35 +1000	[thread overview]
Message-ID: <3DA6C91B.6030502@superbug.demon.co.uk> (raw)
In-Reply-To: s5hit09chus.wl@alsa2.suse.de

Takashi Iwai wrote:

>At Fri, 11 Oct 2002 01:25:19 +1000,
>James Courtier-Dutton wrote:
>  
>
>>Hello
>>I have an application that has many different threads.
>>The sound card's PCM buffer is full during playback, and one thread is 
>>currently in snd_pcm_wait() waiting for enough space to appear in the 
>>buffer before doing the next snd_pcm_write().
>>A different thread wants to flush the buffer. There are two types of 
>>flush: -
>>1) Immeadiately empty the buffer.
>>    
>>
>
>snd_pcm_drop() ?
>
>  
>
>>2) Stop accepting snd_pcm_write() commands until the current buffer has 
>>drained.
>>    
>>
>
>snd_pcm_drain() ?
>
>
>Takashi
>
>  
>
Thankyou, I will use snd_pcm_drop(), but as a side note, what actually 
does "snd_pcm_reset()" do.
Just resetting delay to 0 does not make much sense to me.

Cheer




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  reply	other threads:[~2002-10-11 12:50 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2002-10-10 15:25 problems: flushing during snd_pcm_wait() James Courtier-Dutton
2002-10-11 11:52 ` Takashi Iwai
2002-10-11 12:50   ` James Courtier-Dutton [this message]
2002-10-11 13:00     ` Jaroslav Kysela
2002-10-11 13:23       ` James Courtier-Dutton
2002-10-11 14:22         ` Jaroslav Kysela

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