How to tell how many frames gone to PCM

[Steve deRosier <derosier@pianodisc.com>]

All,

I'm having issues w/ synchronizing MIDI and audio data I output via Alsa.  I'm working through my program trying to confirm data flow and I need some help.

Is there a particular function (or other method) I can use to tell me the number of frames I have sent to alsa via snd_pcm_writei()?  

Either type would be good:
---
open pcm
write all data
get # frames written
close pcm
--- or
open pcm
get current frame count
write all data
get new frame count
print new - old counts
close pcm
---

Any help you could give would be appreciated.

Thanks,
- Steve


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