From patchwork Sun Sep 20 17:17:26 2020 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: 1367946 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=nongnu.org (client-ip=209.51.188.17; helo=lists.gnu.org; envelope-from=qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org; receiver=) Authentication-Results: ozlabs.org; dmarc=none (p=none dis=none) header.from=t-online.de Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 4BvZ6v0KZHz9sTC for ; Mon, 21 Sep 2020 03:19:03 +1000 (AEST) Received: from localhost ([::1]:43958 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1kK2zM-00045L-RN for incoming@patchwork.ozlabs.org; Sun, 20 Sep 2020 13:19:00 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:44282) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1kK2yG-00042U-7J for qemu-devel@nongnu.org; Sun, 20 Sep 2020 13:17:57 -0400 Received: from mailout06.t-online.de ([194.25.134.19]:43574) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1kK2yD-0006GZ-Ls for qemu-devel@nongnu.org; Sun, 20 Sep 2020 13:17:51 -0400 Received: from fwd27.aul.t-online.de (fwd27.aul.t-online.de [172.20.26.132]) by mailout06.t-online.de (Postfix) with SMTP id 58BC141F0588; Sun, 20 Sep 2020 19:17:47 +0200 (CEST) Received: from linpower.localnet (GuSieTZO8h624ylxxBGzLYcCBWlfKRwK+Y1HqBxfKjpXjfmdBRGNUO8FypFXY8RwrV@[93.236.144.216]) by fwd27.t-online.de with (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384 encrypted) esmtp id 1kK2y7-1SNadM0; Sun, 20 Sep 2020 19:17:43 +0200 Received: by linpower.localnet (Postfix, from userid 1000) id 01503335508; Sun, 20 Sep 2020 19:17:29 +0200 (CEST) From: =?utf-8?q?Volker_R=C3=BCmelin?= To: Gerd Hoffmann Subject: [PATCH 6/9] audio: align audio_generic_write with audio_pcm_hw_run_out Date: Sun, 20 Sep 2020 19:17:26 +0200 Message-Id: <20200920171729.15861-6-vr_qemu@t-online.de> X-Mailer: git-send-email 2.26.2 In-Reply-To: <84f1c61a-8399-c75e-96c2-febfc2dd5fab@t-online.de> References: <84f1c61a-8399-c75e-96c2-febfc2dd5fab@t-online.de> MIME-Version: 1.0 X-ID: GuSieTZO8h624ylxxBGzLYcCBWlfKRwK+Y1HqBxfKjpXjfmdBRGNUO8FypFXY8RwrV X-TOI-EXPURGATEID: 150726::1600622263-0000CED0-B7A38245/0/0 CLEAN NORMAL X-TOI-MSGID: 57f6afda-8a5b-4104-bc58-a631ae4fcd07 Received-SPF: none client-ip=194.25.134.19; envelope-from=volker.ruemelin@t-online.de; helo=mailout06.t-online.de X-detected-operating-system: by eggs.gnu.org: First seen = 2020/09/20 13:17:47 X-ACL-Warn: Detected OS = Linux 3.11 and newer [fuzzy] X-Spam_score_int: -18 X-Spam_score: -1.9 X-Spam_bar: - X-Spam_report: (-1.9 / 5.0 requ) BAYES_00=-1.9, FREEMAIL_FROM=0.001, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H2=-0.001, SPF_HELO_NONE=0.001, SPF_NONE=0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: qemu-devel , =?utf-8?b?Wm9sdMOhbiBLxZF2w6Fnw7M=?= Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: "Qemu-devel" The function audio_generic_write should work exactly like audio_pcm_hw_run_out. It's a very similar function working on a different buffer. This patch significantly reduces the number of drop-outs with the DirectSound backend. To hear the difference start qemu with -audiodev dsound,id=audio0,out.mixing-engine=off and play a song in the guest with and without this patch. Signed-off-by: Volker Rümelin --- audio/audio.c | 32 +++++++++++++++++++++++++++----- 1 file changed, 27 insertions(+), 5 deletions(-) diff --git a/audio/audio.c b/audio/audio.c index 75107a12d0..57eddb3324 100644 --- a/audio/audio.c +++ b/audio/audio.c @@ -1484,12 +1484,34 @@ size_t audio_generic_put_buffer_out(HWVoiceOut *hw, void *buf, size_t size) size_t audio_generic_write(HWVoiceOut *hw, void *buf, size_t size) { - size_t dst_size, copy_size; - void *dst = hw->pcm_ops->get_buffer_out(hw, &dst_size); - copy_size = MIN(size, dst_size); + size_t total = 0; + + while (total < size) { + size_t dst_size = size - total; + size_t copy_size, proc; + void *dst = hw->pcm_ops->get_buffer_out(hw, &dst_size); - memcpy(dst, buf, copy_size); - return hw->pcm_ops->put_buffer_out(hw, dst, copy_size); + if (dst_size == 0) { + break; + } + + copy_size = MIN(size - total, dst_size); + if (dst) { + memcpy(dst, (char *)buf + total, copy_size); + } + proc = hw->pcm_ops->put_buffer_out(hw, dst, copy_size); + total += proc; + + if (proc == 0 || proc < copy_size) { + break; + } + } + + if (hw->pcm_ops->run_buffer_out) { + hw->pcm_ops->run_buffer_out(hw); + } + + return total; } size_t audio_generic_read(HWVoiceIn *hw, void *buf, size_t size)