From owner-freebsd-multimedia@FreeBSD.ORG Tue Mar 8 03:14:17 2005 Return-Path: Delivered-To: freebsd-multimedia@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 3660A16A4CE for ; Tue, 8 Mar 2005 03:14:17 +0000 (GMT) Received: from phws.ph.noda.tus.ac.jp (phws.ph.noda.tus.ac.jp [133.31.102.3]) by mx1.FreeBSD.org (Postfix) with ESMTP id 4E5F343D1F for ; Tue, 8 Mar 2005 03:14:16 +0000 (GMT) (envelope-from kazuhito@ph.noda.tus.ac.jp) Received: from localhost (unknown [133.31.111.131]) by phws.ph.noda.tus.ac.jp (Postfix) with ESMTP id 4410F4D80A3; Tue, 8 Mar 2005 12:14:15 +0900 (JST) Date: Tue, 08 Mar 2005 12:14:15 +0900 (JST) Message-Id: <20050308.121415.847025091.kazuhito@ph.noda.tus.ac.jp> To: yongari@kt-is.co.kr From: Kazuhito HONDA In-Reply-To: <20050307030419.GC951@kt-is.co.kr> References: <20050306171027.GE4237@cnd.mcgill.ca> <20050306184416.5603976c@Magellan.Leidinger.net> <20050307030419.GC951@kt-is.co.kr> X-Mailer: Mew version 3.3 on XEmacs 21.5-b18 (chestnut) Mime-Version: 1.0 Content-Type: Text/Plain; charset=us-ascii Content-Transfer-Encoding: 7bit cc: freebsd-multimedia@freebsd.org cc: Alexander@Leidinger.net cc: mat@cnd.mcgill.ca Subject: Re: uaudio patch, configurable buffer size X-BeenThere: freebsd-multimedia@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: Multimedia discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 08 Mar 2005 03:14:17 -0000 Hello, From: Pyun YongHyeon Subject: Re: uaudio patch, configurable buffer size Date: Mon, 7 Mar 2005 12:04:19 +0900 > AFAIK, we already have format converter in kernel. > See feeder_fmt.c. The converter detects differences between hardware > capabilities and audio samples and automatically converts it(e.g. > big endian <->little endian, mono <-> stereo, signed <-> unsigned, > ulaw<->alow etc). Ah, I haven't found it for a long time. I tried to change the caps in uaudio_pcm.c, and a sampling rate can be converted correctly as you wrote. I'll challenge to use this converter in uaudio, too. If I or someone will succeed in it, I'll write to PR usb/78028 that it should be closed except applied. regards, Kazuhito HONDA