From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Eli Zaretskii Newsgroups: gmane.emacs.devel Subject: Re: Creating a coding system Date: Sat, 20 Dec 2014 22:02:37 +0200 Message-ID: <83ioh6qeci.fsf@gnu.org> References: <87ppbeitcs.fsf@fencepost.gnu.org> <87sigasa3n.fsf@igel.home> <878ui2ieu1.fsf@fencepost.gnu.org> <87k31ms3gr.fsf@igel.home> <87zjaigtkz.fsf@fencepost.gnu.org> <83tx0qqn4d.fsf@gnu.org> <87r3vugr1s.fsf@fencepost.gnu.org> <83mw6iqicx.fsf@gnu.org> <87egrugmyi.fsf@fencepost.gnu.org> Reply-To: Eli Zaretskii NNTP-Posting-Host: plane.gmane.org X-Trace: ger.gmane.org 1419105807 16285 80.91.229.3 (20 Dec 2014 20:03:27 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Sat, 20 Dec 2014 20:03:27 +0000 (UTC) Cc: schwab@linux-m68k.org, emacs-devel@gnu.org To: David Kastrup Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Sat Dec 20 21:03:20 2014 Return-path: Envelope-to: ged-emacs-devel@m.gmane.org Original-Received: from lists.gnu.org ([208.118.235.17]) by plane.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1Y2QFE-0007GV-67 for ged-emacs-devel@m.gmane.org; Sat, 20 Dec 2014 21:03:20 +0100 Original-Received: from localhost ([::1]:35665 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Y2QFD-0000T5-GU for ged-emacs-devel@m.gmane.org; Sat, 20 Dec 2014 15:03:19 -0500 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:50420) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Y2QEw-0000Sv-6z for emacs-devel@gnu.org; Sat, 20 Dec 2014 15:03:07 -0500 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1Y2QEq-0007L7-Rv for emacs-devel@gnu.org; Sat, 20 Dec 2014 15:03:02 -0500 Original-Received: from mtaout25.012.net.il ([80.179.55.181]:46129) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Y2QEk-0007H5-Vf; Sat, 20 Dec 2014 15:02:51 -0500 Original-Received: from conversion-daemon.mtaout25.012.net.il by mtaout25.012.net.il (HyperSendmail v2007.08) id <0NGW00F00CP3SZ00@mtaout25.012.net.il>; Sat, 20 Dec 2014 21:58:37 +0200 (IST) Original-Received: from HOME-C4E4A596F7 ([87.69.4.28]) by mtaout25.012.net.il (HyperSendmail v2007.08) with ESMTPA id <0NGW00C0VCTO8Z40@mtaout25.012.net.il>; Sat, 20 Dec 2014 21:58:37 +0200 (IST) In-reply-to: <87egrugmyi.fsf@fencepost.gnu.org> X-012-Sender: halo1@inter.net.il X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.6.x X-Received-From: 80.179.55.181 X-BeenThere: emacs-devel@gnu.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: "Emacs development discussions." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Original-Sender: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Xref: news.gmane.org gmane.emacs.devel:180404 Archived-At: > From: David Kastrup > Cc: schwab@linux-m68k.org, emacs-devel@gnu.org > Date: Sat, 20 Dec 2014 20:06:45 +0100 > > Now the first iteration would be just using the pitches from a Midi > keyboard. The second iteration would then try working with durations. > Either by putting time stamps on the events as they trundle in, or by > reading from a "cooked" Midi stream already containing encoded time time > stamps. > > Conversion of time stamps to musical durations, particularly when the > time stamps have not been generated by a notation program but by a human > player, is non-trivial and would hopefully end up as an incremental > process where a human corrects durations and Emacs improves its overall > guesswork. > > But time stamps are for another time. Right now I'd be glad just to > convert the pitches from they keyboard into LilyPond's pitch notation in > order to make key entry faster. I might be mistaken, but this doesn't look to me like a job for a coding-system. You are talking about parsing input into some abstract notation, then generating a representation of that input in a different language. This is sufficiently different from converting characters from one encoding to another that you should perhaps look at cedet/semantic/ stuff instead.