At Thu, 20 Feb 2003 01:01:52 -0800, Jaroslaw Sobierski wrote: > > Quoting Takashi Iwai <[EMAIL PROTECTED]>: > > > At Mon, 17 Feb 2003 08:01:27 -0800, > > Jaroslaw Sobierski wrote: > > > > > > > > > Another question though. I still cannot get the AC3 pass-through to work. > > > I assume the spdif source must be set to AC-Link (which is hw-reset default > > > > > anyway), and I figure all other stuff should be set by alsa (like > > Category > > > Code, etc.). I have no problem with AC3 on emu10k1, so I guess mplayer is > > > requesting correct stream params from alsa. Yet on AC97 I can't get it to > > > > > work (amp keeps indicating a PCM stream). Any suggestions what to look > > for? > > > > hmm.. ICH4 has a separate SPDIF channel and it looks like we don't use > > this properly. that is, SPDIF is routed via the normal slot 3/4. > > perhaps we should route the spdif via slot 10/11 (in GLOB_CNT bit > > 30:31 to 1:1), and set SPSA to the corresponding value. > > the definition of iec958 in ICH.conf should be rewritten, too... > The default configuration for ad1980 is to use slots 7/8. 3/4 is not > the best choice since the DACs are set to this by default. I don't > think ICH4 has anything to do with this, I downloaded the specs a while > ago only to realize that it just gives you access to the ac97 regs and > that's it.
no, as mentioned above, ICH4 has the configuration of SPDIF out slots via GLOB_CNT bits 30:31. please check these bits. > There's practically nothing to configure on the south bridge itself. > > > > > anyway, can you check whether the register 0x3a is set correctly when > > mplayer tries to play ac3? > > > Yes and no :-). I dumped all ac97 regs from /proc and was going to send > you teh list, but they did not change at all between PCM and ac3. I later > discovered, quite by accident, that for some reason ac3 is never routed > to the ac97 codec - when I choose the hwac3 option the stream always > goes to emu10k1 (and plays correctly over its spdif), even though I > explicitly specify "hw:1". I have to try unloading the modules for emu and > see what happens then. But this seems anyway a bug. Unless the ICH driver > declares no possibilty to create open ac3 stream and alsa falls back on > the default card? can you try ac3dec in alsa-tools (with -C option). if it works, then it's a bug of mplayer. mplayer should access "spdif" or "iec958" as the pcm name. Takashi ------------------------------------------------------- This SF.net email is sponsored by: SlickEdit Inc. Develop an edge. The most comprehensive and flexible code editor you can use. Code faster. C/C++, C#, Java, HTML, XML, many more. FREE 30-Day Trial. www.slickedit.com/sourceforge _______________________________________________ Alsa-devel mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/alsa-devel
