On Thu, Jun 04, 2009 at 08:29:25AM +0200, Takashi Iwai wrote: > At Thu, 4 Jun 2009 14:05:52 +0800, > Wei Ni wrote: > > > > Yes, my test wav file is from Windows. > > > > I had used different player to test with my test wav file. > > The mplayer has no mapping problem, but other players map channels > > wrong. > > As you said, it seems that is caused by the difference of the ALSA and > > Windows. > > I guess mplayer corrects the channel mapping automatically. > > > Unfortunately, our nvidia codec doesn't support channel-slot assignment > > yet. > > OK. > > > How could we fix this problems, do you have any suggestions? > > It's a bit difficult issue right now. Usually we could "fix" the > channel mapping in alsa-lib configuration. But, HD-audio has currently > a single alsa-lib configuration, and others may use the right channel > mapping. > > I don't remember how is the case of Intel HDMI... Can anyone check? The codecs I tested - G35/G45/GM45 - does not support the channel-slot assignment. I guess future hardwares may support that. Thanks, Fengguang > If it also suffers from the same problem, the channel conversion rule > can be put in hdmi configuration statically as a temporary workaround. > > We need a proper API to inform / change the channel mapping, anyway. > Then it'll be better adjustable... > > > -----Original Message----- > > From: Takashi Iwai [mailto:tiwai@xxxxxxx] > > Sent: Wednesday, June 03, 2009 7:02 PM > > To: Wei Ni > > Cc: Alan Alan; Peer Chen; Marek Vasut; alsa-devel@xxxxxxxxxxxxxxxx > > Subject: Re: ALSA patch Nvidia 8 channel hdmi audio > > > > At Wed, 3 Jun 2009 18:25:09 +0800, > > Wei Ni wrote: > > > > > > Hi, Alan > > > > > > I reproduced this problems with speaker-test. The channels are wrong > > > mapped. > > > > > > It's strange that if use mplayer to run, it looks ok. > > > > > > I'm looking this problems, and try to find the root cause. > > > > Actually, from historical reasons, the standard ALSA channel mapping > > for 5.1 is > > FL/FR/RL/RR/C/LFE > > while Windows sets FL/FR/C/LFE/RL/RR. If you play a WAV file assuming > > the latter channel assignment, it will be played like that. > > > > Does the nvidia codec support channel-slot assignment (verb 0x734)? > > If yes, we can assign the channels freely to fix this... > > > > > > thanks, > > > > Takashi > > > > > > > > > > > > > > > > Thanks > > > > > > > > > > > > From: Alan Alan [mailto:alanwww1@xxxxxxxxx] > > > Sent: Wednesday, June 03, 2009 4:00 PM > > > To: Wei Ni > > > Cc: Marek Vasut; alsa-devel@xxxxxxxxxxxxxxxx; Peer Chen > > > Subject: Re: ALSA patch Nvidia 8 channel hdmi audio > > > > > > > > > > > > Hello Wei ! > > > > > > Thanks for replying. > > > I tested it with speaker-test and xbmc babylon. Both had problems with > > > channel mapping. > > > I used this command: > > > > > > speaker-test -Dhdmi -c6 > > > or > > > speaker-test -Dhdmi -c8 > > > > > > alternatively you could try > > > > > > speaker-test -Dhw:0,3 -c6 > > > > > > > > > I had to rund Xorg first and have the command from an xterm, becasue > > > from a normal terminal it would not work. > > > I think that is normal as a limitation of hdmi. > > > > > > What about the support for 24bits 192khz sound ? > > > > > > speaker-test -Dhdmi -c6 -r192000 does not work. > > > > > > Thanks for working on this. > > > > > > > > > > > > > > > > > > 2009/6/3 Wei Ni <wni@xxxxxxxxxx> > > > > > > Hi, Marek and Alan > > > I'm a Nvidia engineer and develop this patch file. > > > > > > I used mplayer to test. The channels are mapped good. > > > Running mplayer -ao alsa:device=hw=0.3 6ch.wav > > > > > > I tried to use speaker-test to test, but I can't get the hdmi device > > > name. > > > I used speaker-test -Dsurround51:NVidia -c6, the sound output from the > > > analog jack. > > > Which device name should I use? > > > > > > I use aplay -l, it show > > > **** List of PLAYBACK Hardware Devices **** > > > card 0: NVidia [HDA NVidia], device 0: ALC1200 Analog [ALC1200 Analog] > > > Subdevices: 1/1 > > > Subdevice #0: subdevice #0 > > > card 0: NVidia [HDA NVidia], device 1: ALC1200 Digital [ALC1200 > > Digital] > > > Subdevices: 1/1 > > > Subdevice #0: subdevice #0 > > > card 0: NVidia [HDA NVidia], device 3: NVIDIA HDMI [NVIDIA HDMI] > > > Subdevices: 1/1 > > > Subdevice #0: subdevice #0 > > > > > > Thanks > > > Wei. > > > > > > > > > -----Original Message----- > > > From: Marek Vasut [mailto:marek.vasut@xxxxxxxxx] > > > Sent: Wednesday, June 03, 2009 8:01 AM > > > To: Alan Alan > > > Cc: alsa-devel@xxxxxxxxxxxxxxxx; Wei Ni > > > Subject: Re: ALSA patch Nvidia 8 channel hdmi audio > > > > > > On Wednesday 03 of June 2009 00:30:04 Alan Alan wrote: > > > > Thank's for the info. > > > > How can i contact him ? > > > > > > He and alsa-devel mailing list are both in CC already, please preserve > > > them > > > there or fix your mailer. > > > > > > > > > > > > 2009/6/3 Marek Vasut <marek.vasut@xxxxxxxxx> > > > > > > > > > I'm not the author of the patch, CCing alsa-devel and the original > > > > > author. > > > > > > > > > > On Tuesday 02 of June 2009 23:58:26 Alan Alan wrote: > > > > > > Hi Marek ! > > > > > > > > > > > > I just read your emailing with nvidia devs about alsa supporting > > 8 > > > > > > > > > > channel > > > > > > > > > > > lpcm over hdmi. > > > > > > > > > > > > I checked it out an i have to tell it is working awsome, except > > > for a > > > > > > few bugs: > > > > > > > > > > > > The channels are wrong mapped. Running a speakertest -Dhdmi -c6 > > > gives > > > > > > the following result (first where it should sound) > > > > > > FL - FL > > > > > > C - RL > > > > > > FR - FR > > > > > > RR - LFE > > > > > > RL - C > > > > > > > > > > > > The other thing i realized that playback is limited to 16 bits > > 48 > > > khz. > > > > > > I think the minimum which is supported by nvidia hardware is > > > 24bits 96 > > > > > > (or 192) khz. > > > > > > Why not ? > > > > > > > > > > > > Could you contact the devs as i don't know how to reach them. > > > > > > > > > > > > ps.: Mybe my build methot was not 100% ok ? I used 1.020 Alsa > > with > > > the > > > > > > oatched nvidia.c file. Anyway the amplifier shows multichannel > > > LPCM and > > > > > > that's great news. > > > > > > > > > > > > > > > > > ------------------------------------------------------------------------ > > > ----------- > > > This email message is for the sole use of the intended recipient(s) > > and > > > may contain > > > confidential information. Any unauthorized review, use, disclosure or > > > distribution > > > is prohibited. If you are not the intended recipient, please contact > > > the sender by > > > reply email and destroy all copies of the original message. > > > > > ------------------------------------------------------------------------ > > > ----------- > > > > > > > > > > > > _______________________________________________ > > > Alsa-devel mailing list > > > Alsa-devel@xxxxxxxxxxxxxxxx > > > http://mailman.alsa-project.org/mailman/listinfo/alsa-devel > > > > > > _______________________________________________ > Alsa-devel mailing list > Alsa-devel@xxxxxxxxxxxxxxxx > http://mailman.alsa-project.org/mailman/listinfo/alsa-devel _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
