From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-0.7 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 6EFCCC3A59E for ; Mon, 2 Sep 2019 15:21:08 +0000 (UTC) Received: from alsa0.perex.cz (alsa0.perex.cz [77.48.224.243]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 60078217D7 for ; Mon, 2 Sep 2019 15:21:07 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=alsa-project.org header.i=@alsa-project.org header.b="j4aKspDR"; dkim=fail reason="signature verification failed" (1024-bit key) header.d=visteon.onmicrosoft.com header.i=@visteon.onmicrosoft.com header.b="oH0nbgfM" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 60078217D7 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=visteon.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=alsa-devel-bounces@alsa-project.org Received: from alsa1.perex.cz (alsa1.perex.cz [207.180.221.201]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by alsa0.perex.cz (Postfix) with ESMTPS id 2B33016C8; Mon, 2 Sep 2019 17:20:15 +0200 (CEST) DKIM-Filter: OpenDKIM Filter v2.11.0 alsa0.perex.cz 2B33016C8 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=alsa-project.org; s=default; t=1567437665; bh=RVsKg1rkJTLKybRLwQGPxpEcjit20qMONmkx1yL1Mpk=; h=From:To:Date:Subject:List-Id:List-Unsubscribe:List-Archive: List-Post:List-Help:List-Subscribe:From; b=j4aKspDRoDH1YWDmPX31POKCsw114BU++h83G4HrptnTIGtZqqTB1UGv+f2BQmqCa AwETGjDtBjjYuvWpP1HRrllK+PIsrzvGOdBG8cezvorDepb4+VwdRkq1aucgZtc+nH 26bcJebAgyzfnETIr/vxV2ZfbMBxiqqNXlHkEpzg= Received: from alsa1.perex.cz (localhost.localdomain [127.0.0.1]) by alsa1.perex.cz (Postfix) with ESMTP id A7077F80394; Mon, 2 Sep 2019 17:20:14 +0200 (CEST) Received: by alsa1.perex.cz (Postfix, from userid 50401) id CF8D7F80369; Fri, 30 Aug 2019 10:31:31 +0200 (CEST) Received: from EUR04-DB3-obe.outbound.protection.outlook.com (mail-eopbgr60115.outbound.protection.outlook.com [40.107.6.115]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by alsa1.perex.cz (Postfix) with ESMTPS id 45297F80096 for ; Fri, 30 Aug 2019 10:31:27 +0200 (CEST) DKIM-Filter: OpenDKIM Filter v2.11.0 alsa1.perex.cz 45297F80096 Authentication-Results: alsa1.perex.cz; dkim=pass (1024-bit key) header.d=visteon.onmicrosoft.com header.i=@visteon.onmicrosoft.com header.b="oH0nbgfM" ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=V4cOgDSJ8i8dlF4Rs7grDhI2S+RDCwgbOzRSUkX0BaxUpuLTCdQDfFoU5mmH4EK2V92PqDfrQNCVjyZ0+eLVGRafGGvtMmLXOsVMR6wtb7EYAFQD0SmQKnfw/u46wk89JZNVoE5+j3ha35dtnMFPoaZSFAdA0gZIeAqMUB938QQu3LuslhTbZgYdXDpa7HJyJJvZhoQ57N5/wAaYspoiqwiMN7AwUor0nTaKr/CFJ1Ixm0qEpufBZwuf57QCfoPJY6JOVMaulGgRYo2WLc3zEsCCKqM2Mb4/EOKdGKym4bt48gpdYqt4E6QPOY3ZrjLAunnOdI6f7WrwFOvHgXgp4A== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; s=arcselector9901; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=xjV4z9u6N1eQ67zNUZI5BMYmP8PxVKTc1ClctCRB+SY=; b=ADji2G/Z0h4CPmNxTs9mxVASfRft5CGGAgWsNXepsZBcuHZINGjQDT9SINptDKct+gfLIf7TcEDP9TckzHFJ2UXzuQhgZqGoHNyxIL56wt28/87PNA8kaCZbAiE5QCWdropywDzYtv3AU+JgDbmyasOMTj+9LpW3ObiFgz15fFs+Aqp1QmrtNDWEh0Aj39ajdNUfqXwb0i9TbRgR2HaaUXm7U0iRoyI4C8TyQ6KUHZzfjQfwnZtIZ654nsecdtMCpr1t60oFz8YKuhPbD0nlzWUSPZ5QNRjl4A0AoZMKS46gN3O+6jgJWTdzWr64pgsfaUzvJkI7yJFq+ogtPZPSQA== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass smtp.mailfrom=visteon.com; dmarc=pass action=none header.from=visteon.com; dkim=pass header.d=visteon.com; arc=none DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=visteon.onmicrosoft.com; s=selector2-visteon-onmicrosoft-com; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=xjV4z9u6N1eQ67zNUZI5BMYmP8PxVKTc1ClctCRB+SY=; b=oH0nbgfMacAuXc1QGE3zHiXlpq950qzvMpeMH6hjOuaECj3mLaKfHvkS4CdR7uFUITJdyB/ttZUO8/qG3qW6jljVziFhOzUpeUWhUQ31Ek38SMr9mxLmTR3T8uNl2k/P+q5jc1JSbNM7XrKTGDh7bN2kMdGHD8Sp+an26tIItFk= Received: from AM6PR06MB4946.eurprd06.prod.outlook.com (20.177.118.208) by AM6PR06MB5777.eurprd06.prod.outlook.com (20.177.118.12) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.2199.21; Fri, 30 Aug 2019 08:31:25 +0000 Received: from AM6PR06MB4946.eurprd06.prod.outlook.com ([fe80::7c64:685a:dbe7:c309]) by AM6PR06MB4946.eurprd06.prod.outlook.com ([fe80::7c64:685a:dbe7:c309%6]) with mapi id 15.20.2178.023; Fri, 30 Aug 2019 08:31:25 +0000 From: "Yang, Xiaotao (X.)" To: mailing list Thread-Topic: about pop chime on pcm api Thread-Index: AdVfCcEMarxS8pnJSw6uYaa7h8B2hw== Date: Fri, 30 Aug 2019 08:31:25 +0000 Message-ID: Accept-Language: zh-CN, en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: authentication-results: spf=none (sender IP is ) smtp.mailfrom=xyang25@visteon.com; x-originating-ip: [165.225.116.207] x-ms-publictraffictype: Email x-ms-office365-filtering-correlation-id: 2da260e0-2bba-49cc-9a24-08d72d247243 x-ms-office365-filtering-ht: Tenant x-microsoft-antispam: BCL:0; PCL:0; RULEID:(2390118)(7020095)(4652040)(8989299)(4534185)(7168020)(4627221)(201703031133081)(201702281549075)(8990200)(5600166)(711020)(4605104)(1401327)(4618075)(2017052603328)(7193020); SRVR:AM6PR06MB5777; x-ms-traffictypediagnostic: AM6PR06MB5777: x-microsoft-antispam-prvs: x-ms-oob-tlc-oobclassifiers: OLM:1201; x-forefront-prvs: 0145758B1D x-forefront-antispam-report: SFV:NSPM; SFS:(10019020)(4636009)(39860400002)(366004)(396003)(136003)(376002)(346002)(189003)(199004)(256004)(6506007)(9686003)(6436002)(99286004)(14444005)(8936002)(55236004)(81156014)(55016002)(81166006)(6306002)(54896002)(4744005)(8676002)(14454004)(186003)(5660300002)(316002)(478600001)(53936002)(26005)(66946007)(64756008)(86362001)(66556008)(66476007)(7736002)(66446008)(76116006)(7696005)(66066001)(790700001)(6116002)(486006)(476003)(71190400001)(25786009)(71200400001)(33656002)(74316002)(52536014)(6916009)(3846002)(102836004)(2906002); DIR:OUT; SFP:1102; SCL:1; SRVR:AM6PR06MB5777; H:AM6PR06MB4946.eurprd06.prod.outlook.com; FPR:; SPF:None; LANG:en; PTR:InfoNoRecords; MX:1; A:1; received-spf: None (protection.outlook.com: visteon.com does not designate permitted sender hosts) x-ms-exchange-senderadcheck: 1 x-microsoft-antispam-message-info: QhuWt1k04pV5Ib0roguviJQ1DwerXqu37YqIVEgmSrLYwDpCKrgr5Js72rQGJOEg5ZTKAOpOutpYTEQXK5o3PkggQUfcGFIAwW/AJ0cqo20VOBupC8+PmGwAUMzm+AefyB2P257FnQFbWl4vEdyV+IZH2l0Q27G1XrVVDriQqpQ3ugZIGjvDj2raUKMKy5my5rIwmiNv0zJ/eU7cnkNVoD1hcoFBlRcdrLmJ/5DzuZZETQwyEU/ZlEteUua/NQ+No1+5lkgD9FNAS/PvTI4CizfHd10IQfXk6GvNyiH9e6GvH3n1yc2uB+2EBr9pSsDzM37bOdsC4RP+AdHK2IdBFJ3gRvRu0Aa6ZDuX46Ko9C+0ydynSYPV+PWbC9/TNFo/TMAhrOUy2q69Y6Xc21ommdztF81gQyz2U7qHbqJrJF8= x-ms-exchange-transport-forked: True MIME-Version: 1.0 X-OriginatorOrg: visteon.com X-MS-Exchange-CrossTenant-Network-Message-Id: 2da260e0-2bba-49cc-9a24-08d72d247243 X-MS-Exchange-CrossTenant-originalarrivaltime: 30 Aug 2019 08:31:25.2471 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 7a147aaf-01ec-498c-80a1-e34a8c63c548 X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-CrossTenant-userprincipalname: bbnA2eHhbgoZ6RF0CTB9A8gPozJ/c9BbgdJZ6ySOq1cUEau7EBZooBjDlttdZpZTGxh3z5DI6yF+hFWPTcr5tg== X-MS-Exchange-Transport-CrossTenantHeadersStamped: AM6PR06MB5777 X-Mailman-Approved-At: Mon, 02 Sep 2019 17:20:12 +0200 X-Content-Filtered-By: Mailman/MimeDel 2.1.15 Subject: [alsa-devel] about pop chime on pcm api X-BeenThere: alsa-devel@alsa-project.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: "Alsa-devel mailing list for ALSA developers - http://www.alsa-project.org" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: alsa-devel-bounces@alsa-project.org Sender: "Alsa-devel" Hi: Why should I call api between the interval if I want to play a wav file two times repeatly, Otherwise pop chime occurs? Eg: (fake code as follows): Following codes works good. Pcm.open();//open pcm device Pcm.play(demo.wav);//set parameter and call snd_pcm_writei() to play Pcm.close();//close pcm device Pcm.open(); Pcm.play(demo.wav); Pcm.close(); But following codes works with pop chime Pcm.open(); Pcm.play(demo.wav); Pcm.play(demo.wav); Pcm.close(); _______________________________________________ Alsa-devel mailing list Alsa-devel@alsa-project.org https://mailman.alsa-project.org/mailman/listinfo/alsa-devel