Currently with the playback buffer attribute minreq = -1 and flag PA_STREAM_EARLY_REQUESTS PulseAudio uses minreq = tlength / 4. To improve audio playback with larger PulseAudio server side buffers, limit minreq to a maximum of 75% of audio timer_rate. That way there is a good chance qemu receives a stream buffer size update before it tries to write data to the playback stream.
Signed-off-by: Volker Rümelin <vr_q...@t-online.de> --- audio/paaudio.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/audio/paaudio.c b/audio/paaudio.c index ff3dd01c96..3186868294 100644 --- a/audio/paaudio.c +++ b/audio/paaudio.c @@ -517,7 +517,8 @@ static int qpa_init_out(HWVoiceOut *hw, struct audsettings *as, ss.rate = as->freq; ba.tlength = pa_usec_to_bytes(ppdo->latency, &ss); - ba.minreq = -1; + ba.minreq = pa_usec_to_bytes(MIN(ppdo->latency >> 2, + (g->dev->timer_period >> 2) * 3), &ss); ba.maxlength = -1; ba.prebuf = -1; -- 2.26.2