Ian,
can you add that line? Patch is attached to
http://tracker.squeakland.org/browse/SQ-638
- Bert -
Begin forwarded message:
From: "Sayamindu Dasgupta (JIRA)" tracker@squeakland.org Date: 16. Dezember 2009 22:37:40 MEZ To: bert@freudenbergs.de Subject: [JIRA] Created: (SQ-638) snd_pcm_avail_update() needs to be called in vm-sound-ALSA
snd_pcm_avail_update() needs to be called in vm-sound-ALSA
Key: SQ-638 URL: http://tracker.squeakland.org/browse/SQ-638 Project: squeakland Issue Type: Bug Components: etoys-sugar Reporter: Sayamindu Dasgupta Attachments: dlo_9375.patch
In XO 1.5, the the sounds produced in Etoys and Scratch are jumpy (http://dev.laptop.org/ticket/9375). It turns out that the issue is solved by calling snd_pcm_avail_update() after calling snd_pcm_delay() in squeak/platforms/unix/vm-sound-ALSA/sqUnixSoundALSA.c
This seems to be consistent with the ALSA documentation (http://www.alsa-project.org/alsa-doc/alsa-lib/group___p_c_m.html#g41ca534658...) which says about snd_pcm_avail_update():
"Also this function might be called after snd_pcm_delay() or snd_pcm_hwsync() functions to move private ring buffer pointers in alsa-lib (the internal plugin chain)."
vm-dev@lists.squeakfoundation.org