[alsa-devel] [LAD] How to get correct midi timings from ALSA using the library only
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Wed Jul 25 11:16:28 CEST 2007
Clemens Ladisch wrote:
> Carlo Florendo wrote:
>> Clemens Ladisch wrote:
>>>> However, I wish to be able to make the sequencer or player work without the
>>>> use of the ALSA queue nor the workaround in (2).
>> Because the queue output and draining, AFAICS, is implemented in a blocking
> When non-blocking mode is set (see snd_seq_nonblock()),
> snd_seq_drain_output() does not block but writes only as many events to
> the kernel buffer as fit inside (or returns -EAGAIN if the kernel buffer
> is completely full).
Bingo! My recent tests show that snd_seq_nonblock() is indeed a useful
function and enables me to have control of the sequencer every time it
outputs an event :)
Gee, I've read the ALSA lib doc for months and never came across this
function. Up to now, I've not seen the part of the doc that describes
snd_seq_nonblock so I went straight to the source code of alsa-lib under
src/seq/seq.c and grepped for snd_seq_block().
The alsa-lib docs have to be improved :)
Thank you for the pointers!
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