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fix microphone lag with PA 

Several people have reported to have bag microphone lag with the PA
backend. While I cannot reproduce the problem here, it seems that their
PA somehow decides to buffer the microphone input for way too long,
causing this delay. This patch sets an upper limit to the amount of
data PA should hold. This fixes the problem reliably on their side,
while having no adverse effects on mine.

Signed-off-by: Martin Schrodt <martin@schrodt.org>
Message-id: 20190615153852.99040-1-martin@schrodt.org
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
This commit is contained in:
Martin Schrodt 2019-06-15 17:38:52 +02:00 committed by Gerd Hoffmann
parent 474f3938d7
commit 58c15e523a
1 changed files with 1 additions and 1 deletions
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2
audio/paaudio.c
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@ -618,7 +618,7 @@ static int qpa_init_in(HWVoiceIn *hw, struct audsettings *as, void *drv_opaque)
ss.rate = as->freq;
ba.fragsize = pa_usec_to_bytes(ppdo->latency, &ss);
ba.maxlength = -1;
ba.maxlength = pa_usec_to_bytes(ppdo->latency * 2, &ss);
ba.minreq = -1;
ba.prebuf = -1;