Date: Tue, 31 Mar 2020 14:35:24 +0200 From: Alexander Leidinger <Alexander@leidinger.net> To: Hans Petter Selasky <hselasky@freebsd.org> Cc: usb@freebsd.org Subject: Re: svn commit: r359446 - head/sys/dev/sound/usb Message-ID: <20200331143524.Horde.ysDNb7YHa282XO7TaHD7KeV@webmail.leidinger.net> In-Reply-To: <202003301650.02UGoX5Y046848@repo.freebsd.org>
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[-- Attachment #1 --] Quoting Hans Petter Selasky <hselasky@freebsd.org> (from Mon, 30 Mar 2020 16:50:33 +0000 (UTC)): > Author: hselasky > Date: Mon Mar 30 16:50:32 2020 > New Revision: 359446 > URL: https://svnweb.freebsd.org/changeset/base/359446 > > Log: > Add support for multiple playback and recording devices per > physical USB audio > device. This requires some structural refactoring inside the driver, mostly > about converting existing audio channel structures into arrays. > > The main audio mixer is provided by the first PCM instance. > The non-first audio instances may only have a software mixer for > PCM playback. Have you thought about providing different pcm devices per physical USB audio device for the functionality of dev.pcm.X.Y.vchanformat / vchanrate? Incompatible configs between those devices could be prevented at runtime via setting all the incompatible devices per physical device to return EBUSY or such while one of the group is open / in use. /dev/sndstat could also contain some kind of status to this effect and to which group of pcm devices pcmX belongs. Bye, Alexander. -- http://www.Leidinger.net Alexander@Leidinger.net: PGP 0x8F31830F9F2772BF http://www.FreeBSD.org netchild@FreeBSD.org : PGP 0x8F31830F9F2772BF [-- Attachment #2 --] -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iQIcBAABAgAGBQJegzkMAAoJEBINsJsD+NiGv0gQAJ8mNFO1+P6N5siNrqh4qS0j mqIWAEzLmlQZjPhMEU+OT6sb86SWgPaTHIBEraEjRmE5qRl64npOjhRDm5UyNNZn txmENRe28118iWXeu9BowcavvmeW+RkDmBJftXt8AmC0ZANzj99qmksr2u/h1xXX fyBGFG37e+DtUrW5iHGq6p2B+Ck+9e8E0fUc2lbNyK/g2szzQxc5xfB1OIfqDaUg EkufPMlgDvJdmkxV2TMgOu9+yW+56Cujf1Gs34JnrNmpVE/kLPr4Dah0o6XzdHaN DBNfMGwSLy9pvrsdx8/lyEBBxPKZvAqJsiQx8ejbzf//y+RnIaYgwRvg7kBnGEd2 BBVi0ElshqmhTQCRLnTGwxEql/i+Jz3imLJDkSebDRQ9LO5xG2WLfi4j0MVh+nL1 FNQLu+McYB4u2gbpkM+IDoUyCbLGqLOYkvdQxdUYNTeu6Zhg3AlMix2l7L7jHjbX nfbky+jzwaIPGwh9VeW99Mf60BtqdG8/Q2Ct7zJ93TZJBFcjQgnIIbKnxRbYqR3s f5WVcLKlQ9DmjIfCh8LuI2MHYrlVm70xiNDe9gRFIkQ3F9aW2QSOTUOXdTJUzIPx XUAcG7Nq+HPEg1R0xwynQBPrdVw8f/4k8y6448P50cX/bKNLY7QbBK4M7zIXbP6T r+hatnYbF9pta2+LT8+O =tODX -----END PGP SIGNATURE-----home | help
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