[alsa-devel] Semantics of a single period per buffer?
While refining the sis7019 for submission, I found a possible issue with having a single period per buffer. The easy way out is to set the minimum number of periods to 2, but I see other drivers allow a single period. This leads to a question about the semantics of a single period that I've not been able to resolve using Google.
Any one have any thoughts or pointers to a discussion on having a single period per buffer? Should it be a one-shot play, or just let it hit XRUN every time? Other ideas?
Thanks, Dave
On Sun, 25 Nov 2007, Dave Dillow wrote:
While refining the sis7019 for submission, I found a possible issue with having a single period per buffer. The easy way out is to set the minimum number of periods to 2, but I see other drivers allow a single period. This leads to a question about the semantics of a single period that I've not been able to resolve using Google.
Any one have any thoughts or pointers to a discussion on having a single period per buffer? Should it be a one-shot play, or just let it hit XRUN every time? Other ideas?
I think, one period buffer can be only useable when XRUN check is disabled (endless ring buffer playing) and application has own timing and polls for the actual position in the ring buffer.
Jaroslav
----- Jaroslav Kysela perex@perex.cz Linux Kernel Sound Maintainer ALSA Project
On Sun, 2007-11-25 at 21:09 +0100, Jaroslav Kysela wrote:
On Sun, 25 Nov 2007, Dave Dillow wrote:
While refining the sis7019 for submission, I found a possible issue with having a single period per buffer. The easy way out is to set the minimum number of periods to 2, but I see other drivers allow a single period. This leads to a question about the semantics of a single period that I've not been able to resolve using Google.
Any one have any thoughts or pointers to a discussion on having a single period per buffer? Should it be a one-shot play, or just let it hit XRUN every time? Other ideas?
I think, one period buffer can be only useable when XRUN check is disabled (endless ring buffer playing) and application has own timing and polls for the actual position in the ring buffer.
Thanks for the clarification -- I'll code accordingly.
participants (2)
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Dave Dillow -
Jaroslav Kysela