How do I use AC3 codec instead of PCM like mplayer -ac hwac3

[Alexander Motin]

Hi.

Norikatsu Shigemura wrote:
> 	I think that my snd_hda(4) device supports hardware AC3 codec
> 	(SEE ALSO: attached dmesg and sysctl messages).  But I couldn't
> 	mplayer -ac hwac3 dvd:// like following:

It looks like there is two problems:

First is yours: your default pcm0/dsp0 device is PCM only, it does not 
supports AC3. Your SPDIF port is pcm1/dsp1. You should specify mplayer 
to use it it you wish to pass AC3 through to the external decoder. Also 
you have AC3 support as part of your video card HDMI port - pcm2/dsp2.

Second is at vchans: it does not support AC3 pass though when "Soft PCM 
volume" is enabled. You can hack this by commenting respective part of 
the hdac_audio_ctl_ossmixer_init(). Also it was reported that with some 
amount of luck it may work even without it is you set pcm and master 
volume on that channel to 100% and your decoder is able to detect 
unmarked AC3 stream.

-- 
Alexander Motin