From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Jean Louis Newsgroups: gmane.emacs.help Subject: Re: sending data to an asynchronous process Date: Fri, 2 Apr 2021 21:54:02 +0300 Message-ID: References: <86im548rg5.fsf@graner.name> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="12707"; mail-complaints-to="usenet@ciao.gmane.io" User-Agent: Mutt/2.0.6 (2021-03-06) Cc: help-gnu-emacs@gnu.org To: Nicolas Graner Original-X-From: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane-mx.org@gnu.org Fri Apr 02 20:58:42 2021 Return-path: Envelope-to: geh-help-gnu-emacs@m.gmane-mx.org Original-Received: from lists.gnu.org ([209.51.188.17]) by ciao.gmane.io with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1lSP0E-0003DC-2G for geh-help-gnu-emacs@m.gmane-mx.org; Fri, 02 Apr 2021 20:58:42 +0200 Original-Received: from localhost ([::1]:45862 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1lSP0D-0008Gg-4X for geh-help-gnu-emacs@m.gmane-mx.org; Fri, 02 Apr 2021 14:58:41 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:36498) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lSOzZ-0008Dh-5s for help-gnu-emacs@gnu.org; Fri, 02 Apr 2021 14:58:01 -0400 Original-Received: from stw1.rcdrun.com ([217.170.207.13]:48845) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lSOzX-0006Mi-0T for help-gnu-emacs@gnu.org; Fri, 02 Apr 2021 14:58:00 -0400 Original-Received: from localhost ([::ffff:41.202.241.42]) (AUTH: PLAIN securesender, TLS: TLS1.3,256bits,ECDHE_RSA_AES_256_GCM_SHA384) by stw1.rcdrun.com with ESMTPSA id 000000000001E1D1.0000000060676933.00005FE5; Fri, 02 Apr 2021 11:57:55 -0700 Mail-Followup-To: Nicolas Graner , help-gnu-emacs@gnu.org Content-Disposition: inline In-Reply-To: <86im548rg5.fsf@graner.name> Received-SPF: pass client-ip=217.170.207.13; envelope-from=bugs@gnu.support; helo=stw1.rcdrun.com 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, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: help-gnu-emacs@gnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Users list for the GNU Emacs text editor List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane-mx.org@gnu.org Original-Sender: "help-gnu-emacs" Xref: news.gmane.io gmane.emacs.help:128819 Archived-At: * Nicolas Graner [2021-04-02 21:37]: > Jean Louis wrote on 2021-04-02 20:18: > > * Nicolas Graner [2021-04-02 13:21]: > >> I am writing a program that creates audio samples in an emacs > >> buffer, then sends them to an external program (sox) to play in > >> the background while I continue working with emacs. Part of the > >> code is roughly as follows: > >> > > (setq process > > (let ((process-connection-type nil)) > > (start-process "my-process" nil > > "sox" "-r" rate "-c" channels "-b" bits "-e" encoding "-q" "-d"))) > > (process-send-region process start end) > > (process-send-eof process) > > > > For process-send-region, it says: > > > > If PROCESS is a non-blocking network process that hasn’t been fully > > set up yet, this function will block until socket setup has completed. > > > > Maybe that applies. (defun rcd-command-output-from-input (program input &rest args) "Returns output from PROGRAM INPUT with optional ARGS" (let* ((output (with-temp-buffer (insert input) (apply #'call-process-region nil nil program t t nil args) (buffer-string)))) output)) (rcd-command-output-from-input "sox" (buffer-string) "-r" "44100" "-c" "2" "-b" "32" "-e" "signed-integer" "-t" "raw" "-" "-q" "-d") → "" I have tried this above, it plays my buffer. But it is not asynchronous. There is library async.el, but I am not sure if it can receive from buffer directly, you can however, make your function to feed the buffer first into a file. async-start-process is an autoloaded compiled Lisp function in ‘async.el’. (async-start-process NAME PROGRAM FINISH-FUNC &rest PROGRAM-ARGS) Start the executable PROGRAM asynchronously named NAME. See ‘async-start’. PROGRAM is passed PROGRAM-ARGS, calling FINISH-FUNC with the process object when done. If FINISH-FUNC is nil, the future object will return the process object when the program is finished. Set DEFAULT-DIRECTORY to change PROGRAM’s current working directory. async-send is a compiled Lisp function in ‘async.el’. (async-send &rest ARGS) Send the given messages to the asychronous Emacs PROCESS. -- Jean Take action in Free Software Foundation campaigns: https://www.fsf.org/campaigns Sign an open letter in support of Richard M. Stallman https://rms-support-letter.github.io/