2010/2/22 Lennart Poettering <mznyfn@xxxxxxxxxxx> > On Sun, 21.02.10 11:49, Raymond Yau (superquad.vortex2@xxxxxxxxx) wrote: > > > The most common onboard audio is HDA so this is not any exceptional cases > > > > Those HDA multi streaming feature are most users wanted in desktop > > enviornment, are pulseaudio really designed for deskop or just only for > > notebook and mobile ? > > > > The front panel green/pink jack can be used by one application while the > > rear panel audio jacks can be used to another application for surround or > > mic for karaoke > > I am not entirely convinced that this is really a common case. > VT17xx codec already support independent HP mode http://git.alsa-project.org/?p=alsa-kernel.git;a=commit;h=cdc1784d49258198df600fbc1d37c07d7eee5ed6 **** List of PLAYBACK Hardware Devices **** card 0: SB [HDA ATI SB], device 0: VT1708S Analog [VT1708S Analog] Subdevices: 1/2 Subdevice #0: subdevice #0 Subdevice #1: subdevice #1 card 0: SB [HDA ATI SB], device 1: VT1708S Digital [VT1708S Digital] Subdevices: 1/1 Subdevice #0: subdevice #0 **** List of CAPTURE Hardware Devices **** card 0: SB [HDA ATI SB], device 0: VT1708S Analog [VT1708S Analog] Subdevices: 2/2 Subdevice #0: subdevice #0 Subdevice #1: subdevice #1 AD1988B 10 channels codec on my ASUS P5BV already has 3 capture subdevices **** List of CAPTURE Hardware Devices **** card 0: Intel [HDA Intel], device 0: AD198x Analog [AD198x Analog] Subdevices: 3/3 Subdevice #0: subdevice #0 Subdevice #1: subdevice #1 Subdevice #2: subdevice #2 card 0: Intel [HDA Intel], device 1: AD198x Digital [AD198x Digital] Subdevices: 1/1 Subdevice #0: subdevice #0 http://www.analog.com/en/audiovideo-products/audio-codecs/ad1988b/products/product.html The AD1988A and AD1988B have 10 DACs and 6 ADCs, Analog mixer supports recording and playback of signals from multiple sources ALC88x **** List of CAPTURE Hardware Devices **** card 0: VT82xx [HDA VIA VT82xx], device 0: ALC888 Analog [ALC888 Analog] Subdevices: 1/1 Subdevice #0: subdevice #0 card 0: VT82xx [HDA VIA VT82xx], device 2: ALC888 Analog [ALC888 Analog] Subdevices: 1/1 Subdevice #0: subdevice #0 Do any PA developer has a desktop computer with HDA audio ? > But anyway, there is nothing in PA that would limit it to not use > multiple parallel devices of a sound card at the same time, with the > exception that ALSA currently has no enumeration API which could > inform us which uses of the card are exclusive each other and which > ones are not. PA currently tries to open the sound card in all > combinations possible, assuming that EBUSY means it found an invalid > combination. If one day ALSA gains an API that allows figuring out > which combinations of streams are possible and which ones are not, I > am happy to reinvestigate the whole issue. > > > Send a game's sound through 5.1 speakers while the Internet chatting > audio > > is sent through your headset. > > More often than not you'd probably use two seperate cards for that. > > > Send a DVD movie with 5.1 audio to a surround sound system in the living > > room, while you listen to digital music and surf the Web on the PC. > > I somehow doubt that this is the most common of use cases we need to > care about. > > > THe point is that PA release/close the device (suspend on idle) , if > another > > application using the subdevice 0 before PA resume/reopen, PA will open > > subdevice 1 and cannot find the correct capture volume control and user > will > > complain they cannot record > > > > Since PA did not check the subdevice number to find the correct mixer > > control > > I'd certainly check the subdevice id if the smixer API would supply me > with it. > if ( snd_pcm_info_get_subdevices_count(pcm_info) > 1 ) && ( snd_pcm_info_get_subdevices_count(pcm_info) < 8 )) snd_mixer_selem_id_set_index(sid, snd_pcm_info_get_subdevice(pcm_info)); > > Lennart > > _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
