Date: Wed, 01 Dec 1999 01:19:47 -0600 From: Russell Cattelan <cattelan@thebarn.com> To: wkt@cs.adfa.edu.au Cc: freebsd-multimedia@FreeBSD.ORG Subject: Re: Help ioctl()ing /dev/audio Message-ID: <3844CC13.3687E4EA@thebarn.com> References: <199912010256.NAA06269@henry.cs.adfa.edu.au>
next in thread | previous in thread | raw e-mail | index | archive | help
Warren Toomey wrote: I would talk a look at the elightenment sound daemon. (esd) ... ports/audio/esound > Hi all, > I've just joined the multimedia list, but have searched/browsed > thru the back-issues to find an answer with no luck. > > 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: > > - 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 > > However, I'm having a damn hard time trying to find the correct ioctls > to issue to /dev/audio, or even if I should be using /dev/dsp instead. > I'm running FreeBSD-3.2 with the following kernel options: > > # css: Crystal Sound System (CSS 423x PnP) > controller snd0 > device css0 at isa? port 0x534 irq 5 drq 1 flags 0x08 vector adintr > > and the device works fine. Could somebody point me at the right place > to find the right ioctls to set up: sample rate, stereo/mono etc. > I've found machine/sound.h to be extremely confusing. > > Many thanks in advance! > > Warren > > To Unsubscribe: send mail to majordomo@FreeBSD.org > with "unsubscribe freebsd-multimedia" in the body of the message -- Russell Cattelan cattelan@thebarn.com To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-multimedia" in the body of the message
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?3844CC13.3687E4EA>