diff options
| author | Gerd Hoffmann <kraxel@redhat.com> | 2011-01-24 22:07:45 +0100 |
|---|---|---|
| committer | malc <av1474@comtv.ru> | 2011-01-25 19:56:47 +0300 |
| commit | e6d16fa439aeebd34e135edd3e29d4a2db6b1a33 (patch) | |
| tree | c9487f196d765bfc8508681393b43624204b102d | |
| parent | 6315633b2535dc82dc1b3403f884b81e26b4c72c (diff) | |
pulseaudio: setup buffer attrs
Request reasonable buffer sizes from pulseaudio. Without this
pa_simple_write() can block quite long and lead to dropouts,
especially with guests which use small audio ring buffers.
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Signed-off-by: malc <av1474@comtv.ru>
| -rw-r--r-- | audio/paaudio.c | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/audio/paaudio.c b/audio/paaudio.c index 858ca81804..75e3ea0a8c 100644 --- a/audio/paaudio.c +++ b/audio/paaudio.c @@ -289,6 +289,7 @@ static int qpa_init_out (HWVoiceOut *hw, struct audsettings *as) { int error; static pa_sample_spec ss; + static pa_buffer_attr ba; struct audsettings obt_as = *as; PAVoiceOut *pa = (PAVoiceOut *) hw; @@ -296,6 +297,15 @@ static int qpa_init_out (HWVoiceOut *hw, struct audsettings *as) ss.channels = as->nchannels; ss.rate = as->freq; + /* + * qemu audio tick runs at 250 Hz (by default), so processing + * data chunks worth 4 ms of sound should be a good fit. + */ + ba.tlength = pa_usec_to_bytes (4 * 1000, &ss); + ba.minreq = pa_usec_to_bytes (2 * 1000, &ss); + ba.maxlength = -1; + ba.prebuf = -1; + obt_as.fmt = pa_to_audfmt (ss.format, &obt_as.endianness); pa->s = pa_simple_new ( @@ -306,7 +316,7 @@ static int qpa_init_out (HWVoiceOut *hw, struct audsettings *as) "pcm.playback", &ss, NULL, /* channel map */ - NULL, /* buffering attributes */ + &ba, /* buffering attributes */ &error ); if (!pa->s) { |