From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:49489) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ZaTcd-0003JI-L9 for qemu-devel@nongnu.org; Fri, 11 Sep 2015 15:04:36 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1ZaTca-0003Wh-GC for qemu-devel@nongnu.org; Fri, 11 Sep 2015 15:04:31 -0400 Received: from mailout07.t-online.de ([194.25.134.83]:42411) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ZaTca-0003Vy-9O for qemu-devel@nongnu.org; Fri, 11 Sep 2015 15:04:28 -0400 From: =?UTF-8?Q?Volker_R=c3=bcmelin?= Message-ID: <55F3259D.3000309@t-online.de> Date: Fri, 11 Sep 2015 21:03:57 +0200 MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Subject: [Qemu-devel] [PATCH] pulseaudio: reduce 24s recording latency List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Cc: Gerd Hoffmann , =?UTF-8?B?S8WRdsOhZ8OzLCBab2x0w6Fu?= Current code doesn't provide pulseaudio buffer attributes for recording. Without buffer attributes pulseaudio uses a default buffer of 4MB. 4MB is approximately 24s 16bit stereo audio data at 44.1kHz. This patch fixes bug #1492649 |Signed-off-by: Volker R=C3=BCmelin | --- audio/paaudio.c | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-) diff --git a/audio/paaudio.c b/audio/paaudio.c index fea6071..c1169d4 100644 --- a/audio/paaudio.c +++ b/audio/paaudio.c @@ -608,6 +608,7 @@ static int qpa_init_in(HWVoiceIn *hw, struct audsetti= ngs *as, void *drv_opaque) { int error; pa_sample_spec ss; + pa_buffer_attr ba; struct audsettings obt_as =3D *as; PAVoiceIn *pa =3D (PAVoiceIn *) hw; paaudio *g =3D pa->g =3D drv_opaque; @@ -616,6 +617,12 @@ static int qpa_init_in(HWVoiceIn *hw, struct audsett= ings *as, void *drv_opaque) ss.channels =3D as->nchannels; ss.rate =3D as->freq; =20 + ba.fragsize =3D pa_frame_size (&ss) * g->conf.samples; + ba.maxlength =3D 5 * ba.fragsize; + ba.tlength =3D -1; + ba.prebuf =3D -1; + ba.minreq =3D -1; + obt_as.fmt =3D pa_to_audfmt (ss.format, &obt_as.endianness); =20 pa->stream =3D qpa_simple_new ( @@ -625,7 +632,7 @@ static int qpa_init_in(HWVoiceIn *hw, struct audsetti= ngs *as, void *drv_opaque) g->conf.source, &ss, NULL, /* channel map */ - NULL, /* buffering attributes */ + &ba, /* buffering attributes */ &error ); if (!pa->stream) { --=20 1.8.4.5