From nobody Tue Feb 10 11:56:11 2026 Delivered-To: importer@patchew.org Received-SPF: pass (zoho.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Authentication-Results: mx.zohomail.com; spf=pass (zoho.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1552574984984565.7113671669075; Thu, 14 Mar 2019 07:49:44 -0700 (PDT) Received: from localhost ([127.0.0.1]:38965 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1h4Rfx-0001qY-0j for importer@patchew.org; Thu, 14 Mar 2019 10:49:41 -0400 Received: from eggs.gnu.org ([209.51.188.92]:36985) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1h4RYT-0004je-1K for qemu-devel@nongnu.org; Thu, 14 Mar 2019 10:41:58 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1h4RJj-0001zY-MW for qemu-devel@nongnu.org; Thu, 14 Mar 2019 10:26:45 -0400 Received: from [2a01:4f8:141:20d3::2] (port=54472 helo=zapp.schrodt.org) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1h4RJj-0001iP-Ah for qemu-devel@nongnu.org; Thu, 14 Mar 2019 10:26:43 -0400 Received: from schapa.schrodt.org ([46.237.225.84]:37612 helo=zoidberg.machine.schrodt.org) by zapp.schrodt.org with esmtps (TLSv1.3:TLS_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1h4RJb-0005dg-6r; Thu, 14 Mar 2019 15:26:35 +0100 Received: from spheenik by zoidberg.machine.schrodt.org with local (Exim 4.92) (envelope-from ) id 1h4RJa-00093g-Ux; Thu, 14 Mar 2019 15:26:34 +0100 From: Martin Schrodt To: qemu-devel@nongnu.org Date: Thu, 14 Mar 2019 15:26:33 +0100 Message-Id: <20190314142634.34537-3-martin@schrodt.org> X-Mailer: git-send-email 2.21.0 In-Reply-To: <20190314142634.34537-1-martin@schrodt.org> References: <20190314142634.34537-1-martin@schrodt.org> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 2a01:4f8:141:20d3::2 Subject: [Qemu-devel] [PATCH V2 2/3] audio/paaudio: prolong and make latency configurable X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: kraxel@redhat.com Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" Content-Type: text/plain; charset="utf-8" The latency of a connection to the PulseAudio server is determined by the t= length parameter. This was hardcoded to 10ms, which is a bit too tight on m= y machine, causing audio on host and guest to malfunction. A setting of 15m= s works fine here. To allow tweaking, I also made the setting configurable = via the new -audiodev config. Signed-off-by: Martin Schrodt --- audio/paaudio.c | 18 +++++++----------- qapi/audio.json | 6 +++++- 2 files changed, 12 insertions(+), 12 deletions(-) diff --git a/audio/paaudio.c b/audio/paaudio.c index 1a799ca3e7..c9007fdb01 100644 --- a/audio/paaudio.c +++ b/audio/paaudio.c @@ -500,16 +500,12 @@ static pa_stream *qpa_simple_new ( if (dir =3D=3D PA_STREAM_PLAYBACK) { r =3D pa_stream_connect_playback (stream, dev, attr, PA_STREAM_INTERPOLATE_TIMING -#ifdef PA_STREAM_ADJUST_LATENCY |PA_STREAM_ADJUST_LATENCY -#endif |PA_STREAM_AUTO_TIMING_UPDATE, NUL= L, NULL); } else { r =3D pa_stream_connect_record (stream, dev, attr, PA_STREAM_INTERPOLATE_TIMING -#ifdef PA_STREAM_ADJUST_LATENCY |PA_STREAM_ADJUST_LATENCY -#endif |PA_STREAM_AUTO_TIMING_UPDATE); } =20 @@ -549,12 +545,8 @@ static int qpa_init_out(HWVoiceOut *hw, struct audsett= ings *as, ss.channels =3D as->nchannels; ss.rate =3D as->freq; =20 - /* - * qemu audio tick runs at 100 Hz (by default), so processing - * data chunks worth 10 ms of sound should be a good fit. - */ - ba.tlength =3D pa_usec_to_bytes (10 * 1000, &ss); - ba.minreq =3D pa_usec_to_bytes (5 * 1000, &ss); + ba.tlength =3D pa_usec_to_bytes (ppdo->latency, &ss); + ba.minreq =3D -1; ba.maxlength =3D -1; ba.prebuf =3D -1; =20 @@ -813,7 +805,11 @@ static int qpa_validate_per_direction_opts (Audiodev *= dev, AudiodevPaPerDirectio { if (!pdo->has_buffer_length) { pdo->has_buffer_length =3D true; - pdo->buffer_length =3D dev->timer_period * 4; + pdo->buffer_length =3D dev->timer_period * 9 / 2; + } + if (!pdo->has_latency) { + pdo->has_latency =3D true; + pdo->latency =3D 15000; } return 1; } diff --git a/qapi/audio.json b/qapi/audio.json index 97aee37288..9fefdf5186 100644 --- a/qapi/audio.json +++ b/qapi/audio.json @@ -206,12 +206,16 @@ # # @name: name of the sink/source to use # +# @latency: latency you want PulseAudio to achieve in microseconds +# (default 15000) +# # Since: 4.0 ## { 'struct': 'AudiodevPaPerDirectionOptions', 'base': 'AudiodevPerDirectionOptions', 'data': { - '*name': 'str' } } + '*name': 'str', + '*latency': 'uint32' } } =20 ## # @AudiodevPaOptions: --=20 2.21.0