Yair K. wrote: > On Tuesday 07 October 2008 21:05:41 Hannu Savolainen wrote: > >> Stéphane Letz wrote: >> >>> Hi, >>> >>> We are implementing a full duplex backend that is using separated in/ >>> out devices. Basically we are following what is explained in the >>> "Using separate input and output devices" section in the following >>> page http://manuals.opensound.com/developer/full_duplex.html. We use a >>> single thread that is doing read/write in a loop. >>> >>> Everything works as expected on a HDAudio card on Solaris à 48 kHz: >>> read is the function that blocks and drive the audio timing. But when >>> using another sample rate values (like 44.1 kHz) on the same card, >>> then write is blocking and read returns immediately. >>> >>> >> This is probably caused by the virtual mixer (vmix) subsystem that uses >> the device at fixed 48 kHz rate. Other rates will require conversions >> which make recording and playback to work in slightly different way. You >> can bypass vmix by opening the device with the O_EXCL flag. >> > > Can SNDCTL_DSP_COOKEDMODE be used instead? > http://manuals.opensound.com/developer/fulldup.c.html#LOC8 Seems to do this. > Actually this is necessary too (in addition to O_EXCL).
Best regards, Hannu _______________________________________________ oss-devel mailing list oss-devel@mailman.opensound.com http://mailman.opensound.com/mailman/listinfo/oss-devel
