From patchwork Fri Sep 11 19:03:57 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?q?Volker_R=C3=BCmelin?= X-Patchwork-Id: 517034 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from lists.gnu.org (lists.gnu.org [IPv6:2001:4830:134:3::11]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 85EBC14010F for ; Sat, 12 Sep 2015 08:05:01 +1000 (AEST) Received: from localhost ([::1]:58729 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ZaWRH-0002Ch-He for incoming@patchwork.ozlabs.org; Fri, 11 Sep 2015 18:04:59 -0400 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 Received: from fwd19.aul.t-online.de (fwd19.aul.t-online.de [172.20.27.65]) by mailout07.t-online.de (Postfix) with SMTP id E471D161115; Fri, 11 Sep 2015 21:04:25 +0200 (CEST) Received: from [192.168.211.100] (GW7dW8ZlwhM6bYN1LnUKhtM5cRZPoCpSAfFfm3d7XbP8GuJerZAGlz6DHpjEULCgb+@[84.160.2.101]) by fwd19.t-online.de with (TLSv1.2:ECDHE-RSA-AES256-SHA encrypted) esmtp id 1ZaTcQ-4N4vDc0; Fri, 11 Sep 2015 21:04:18 +0200 To: qemu-devel@nongnu.org From: =?UTF-8?Q?Volker_R=c3=bcmelin?= Message-ID: <55F3259D.3000309@t-online.de> Date: Fri, 11 Sep 2015 21:03:57 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101 Thunderbird/38.2.0 MIME-Version: 1.0 X-ID: GW7dW8ZlwhM6bYN1LnUKhtM5cRZPoCpSAfFfm3d7XbP8GuJerZAGlz6DHpjEULCgb+ X-TOI-MSGID: f6614365-600b-4ec2-b551-35feddd130f9 X-detected-operating-system: by eggs.gnu.org: GNU/Linux 3.x X-Received-From: 194.25.134.83 X-Mailman-Approved-At: Fri, 11 Sep 2015 18:03:28 -0400 Cc: Gerd Hoffmann , =?UTF-8?B?S8WRdsOhZ8OzLCBab2x0w6Fu?= Subject: [Qemu-devel] [PATCH] pulseaudio: reduce 24s recording latency X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org 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 Rümelin | --- 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 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; @@ -616,6 +617,12 @@ static int qpa_init_in(HWVoiceIn *hw, struct audsettings *as, void *drv_opaque) ss.channels = as->nchannels; ss.rate = as->freq; + ba.fragsize = pa_frame_size (&ss) * g->conf.samples; + ba.maxlength = 5 * ba.fragsize; + ba.tlength = -1; + ba.prebuf = -1; + ba.minreq = -1; + obt_as.fmt = pa_to_audfmt (ss.format, &obt_as.endianness); pa->stream = qpa_simple_new ( @@ -625,7 +632,7 @@ static int qpa_init_in(HWVoiceIn *hw, struct audsettings *as, void *drv_opaque) g->conf.source, &ss, NULL, /* channel map */ - NULL, /* buffering attributes */ + &ba, /* buffering attributes */ &error ); if (!pa->stream) {