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audio/paaudio: fix microphone input being unusable 

The current code does not specify the metrics of the buffers for the
input device. This makes PulseAudio choose very bad defaults, which
causes input to be unusable: Audio put in gets out 30 seconds later.
This patch fixes that and makes the latency configurable as well.

Signed-off-by: Martin Schrodt <martin@schrodt.org>
Message-id: 20190315084653.120020-4-martin@schrodt.org
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
This commit is contained in:
Martin Schrodt 2019-03-15 09:46:53 +01:00 committed by Gerd Hoffmann
parent f614277765
commit ade103011c
1 changed files with 7 additions and 1 deletions
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8
audio/paaudio.c
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@ -605,6 +605,7 @@ static int qpa_init_in(HWVoiceIn *hw, struct audsettings *as, void *drv_opaque)
{
int error;
pa_sample_spec ss;
pa_buffer_attr ba;
struct audsettings obt_as = *as;
PAVoiceIn *pa = (PAVoiceIn *) hw;
paaudio *g = pa->g = drv_opaque;
@ -615,6 +616,11 @@ static int qpa_init_in(HWVoiceIn *hw, struct audsettings *as, void *drv_opaque)
ss.channels = as->nchannels;
ss.rate = as->freq;
ba.fragsize = pa_usec_to_bytes(ppdo->latency, &ss);
ba.maxlength = -1;
ba.minreq = -1;
ba.prebuf = -1;
obt_as.fmt = pa_to_audfmt (ss.format, &obt_as.endianness);
pa->stream = qpa_simple_new (
@ -624,7 +630,7 @@ static int qpa_init_in(HWVoiceIn *hw, struct audsettings *as, void *drv_opaque)
ppdo->has_name ? ppdo->name : NULL,
&ss,
NULL, /* channel map */
NULL, /* buffering attributes */
&ba, /* buffering attributes */
&error
);
if (!pa->stream) {