Date: Wed, 01 Dec 1999 13:33:33 +1030 (CST) From: "Daniel O'Connor" <doconnor@gsoft.com.au> To: Warren Toomey <wkt@cs.adfa.edu.au> Cc: freebsd-multimedia@freebsd.org Subject: RE: Help ioctl()ing /dev/audio Message-ID: <XFMail.991201133333.doconnor@gsoft.com.au> In-Reply-To: <199912010256.NAA06269@henry.cs.adfa.edu.au>
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On 01-Dec-99 Warren Toomey wrote: > I want to encode 16-bit mono/stereo audio (at different samplerates) > on the fly using Lame (http://www.sulaco.org/mp3/). Lame can read > raw PCM data from standard input and save as an MP3 file. > > However, running lame [options] < /dev/audio isn't going to work, because > I'll need to issue the correct ioctls to the sound device. I'm thinking of > writing a front-end C program which does: Try looking at http://www.4front-tech.com/pguide/index.html > - reads cmd-line args, works out sound format required > - opens /dev/audio > - issues appropriate ioctl()s to /dev/audio > - closes file descriptor 0 > - dup2()s /dev/audio down to file descriptor 0 > - closes /dev/audio > - execs Lame with the original cmd-line args What you could do is issue the ioctl and then act like cat.. Much less hassle :) ie.. ./myaudiothing -w -f 44100 -m | lame --- Daniel O'Connor software and network engineer for Genesis Software - http://www.gsoft.com.au "The nice thing about standards is that there are so many of them to choose from." -- Andrew Tanenbaum To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-multimedia" in the body of the message
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