Le samedi 21 février 2009 à 18:29 +0000, Andrea a écrit : > Hi, > > I've tried to compare the behaviour of ALSA when Ekiga uses the direct access > vs going through > pulse-alsa module. > > I've added some alsa print status in ptlib and the 2 files are the output > when playing the ring-tone. > > I've used the 2 alsa calls to populate the log > > 1) snd_pcm_dump at the beginning > 2) snd_pcm_status_dump after each write > > The first part is the same, but the status after each write is different > > DIRECT > > About to write 1764 len bytes > state : RUNNING > trigger_time: 9762.542972003 <<<<<<<<<<<<<<<<<<<<<<<< > tstamp : 9762.543004130 <<<<<<<<<<<<<<<<<<<<<<<< > delay : 430 <<<<<<<<<<<<<<<<<<<<<<< > avail : 1334 > avail_max : 1334 > > PULSE > > About to write 1764 len bytes > state : RUNNING > trigger_time: 1235218239.552437000 <<<<<<<<<<<<<<< > tstamp : 0.000000 <<<<<<<<<<<<<<< > delay : 0 <<<<<<<<<<<<<<< > avail : 441 > avail_max : 1764 > > > And then every now and then when running via pulse we generate an underrun > > About to write 1764 len bytes > state : RUNNING > trigger_time: 1235218239.552437000 > tstamp : 0.000000 > delay : 0 > avail : 0 > avail_max : 1764 > ####################################################################### EPIPE > state : XRUN > trigger_time: 1235218239.552437000 > tstamp : 0.000000 > delay : 0 > avail : 0 > avail_max : 1764 > > > Does anybody know a bit what all those values mean? > It seems that the underrun comes earlier that without pulse-alsa... > > I've tried to increase the size of the buffers in > PSoundChannelALSA::SetBuffers() and the playback > is much better, but that gives a bigger latency and delay when calling the > echo test.
The pulseaudio guy told us we have a problem with the way we calculate the periods. Not sure exactly what is wrong though... -- _ Damien Sandras (o- //\ Ekiga Softphone : http://www.ekiga.org/ v_/_ Be IP : http://www.beip.be/ FOSDEM : http://www.fosdem.org/ SIP Phone : sip:[email protected] _______________________________________________ ekiga-list mailing list [email protected] http://mail.gnome.org/mailman/listinfo/ekiga-list
