Hi, I AM trying to convert an internal app from oss to alsa and is trying to grok the alsa API and the examples I can find. I would like to ask some questions to avoid guessing and making wrong assumptions. Feel free to redirect me to where I should have found the answer myself. http://www.alsa-project.org/alsa-doc/alsa-lib/group___p_c_m.html#gf13067c0ebde29118ca05af76e5b17a9 says about snd_pcm_writei: > Returns: a positive number of frames actually written otherwise a negative error code > ... > Return values: > ... > -EPIPE an underrun occurred > ... > The count of bytes can be less only if a signal or underrun occurred. So what is returned in case of underrun? Error code or count of bytes? Should snd_pcm_recover always be used to get the byte count after -EPIPE? snd_pcm_recover is neither mentioned in the link above nor in http://www.alsa-project.org/alsa-doc/alsa-lib/pcm.html , so I don't feel confident about that. And is it measured in "positive number of frames actually written" or "count of bytes"? It surprises me that snd_pcm_writei shows non-blocking behaviour in case of underruns and don't use all the offered data. I would guess that it either blocked and enjoyed the data it finally got, or that it gave an error and didn't take any data at all. But if this is how it is, then ... that is how it is ;-) /Mads using alsa-lib-1.0.21-3.fc11.i586 alsa-plugins-pulseaudio-1.0.21-2.fc11.i586 _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
