Messages in this thread | | | Date | Fri, 20 Jan 2006 15:56:36 +0100 | From | Takashi Iwai <> | Subject | Re: [Alsa-devel] RFC: OSS driver removal, a slightly different approach |
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At Fri, 20 Jan 2006 15:25:54 +0100 (MET), Jan Engelhardt wrote: > > >Hi, > > > >On Thursday 19 January 2006 18:46, Adrian Bunk wrote: > >> SOUND_EMU10K1 > >> - ALSA #1735 (OSS emulation 4-channel mode rear channels not working) > > > >If I understand alsa - oss emulation correctly, I think, this will be not > >fixed soon (my opinion - never). This is too much work for too little gain. > > On that way, I'd like to inquiry something: > I have a card that works with the snd-cs46xx module. > With the OSS emulation (/dev/dsp), I can only output 2 channels, and the > other two must be sent to /dev/adsp. Is this intended? Would not it be > easier to make /dev/dsp allow receiving an ioctl setting 4 channels?
This is exactly like the case of emu10k1. The chip supports only 2-channel stereo streams. If you need a 4-channel interleaved stream, you have to merge the data in two individual streams to a single 4-channel stream on software. Currently, this isn't handled in ALSA kernel-space OSS emulation.
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