[pulseaudio-discuss] {PATCH][RFC] AC3 passthrough support

Michael Rans mcarans at yahoo.co.uk
Mon Jul 12 14:37:28 PDT 2010

You're welcome.

This may be an obvious question, but what is the 
@args.0 {
    type integer

Is that what you meant by "Adding the argument removes the need to exit the 
profile." and if you did, I didn't understand at what point I had to exit the 
profile. Can you explain? Sorry if I'm being stupid.


From: pl bossart <bossart.nospam at gmail.com>
To: General PulseAudio Discussion <pulseaudio-discuss at mail.0pointer.de>
Sent: Mon, 12 July, 2010 22:29:18
Subject: Re: [pulseaudio-discuss] {PATCH][RFC] AC3 passthrough support

> Even with this fix, the sink doesn't seem to do anything:

Actually discard this comment, it looks like it's crunching data if
you specify the rate in asound.conf.

# Encode AC3 -> Directly on hardware
pcm.Filter_A52Encode {
    type a52
    bitrate 448
    channels 6

# Rate Converter to 48kHz, needed for some applications
pcm.a52 {
    @args.0 {
    type integer
    type rate
    slave {
        pcm "Filter_A52Encode"
        rate 48000

Adding the argument removes the need to exit the profile.
It's really odd that the rate plugin is required even though
everything is already configured at 48kHz.
I will test tomorrow and if this is fine then I'll prepare a patch for
upstream. Thanks for doing the groundwork for this bug.
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