<html><head><style type="text/css"></style></head><body><div style="font-family:arial,helvetica,sans-serif;font-size:10pt"><div>Hi, Further to my previous message, I tried: //    pa_sink_set_max_rewind(u->sink, u->hwbuf_size);     pa_sink_set_max_rewind(u->sink, 0); That seemed to fix it, although I fear it will break any other Alsa sinks. Is there a better way to implement this? Interestingly, I then no longer need tiemout=0 here: load-module module-suspend-on-idle But I still need to go via the rate converter to the a52 encoder in asoundrc. Cheers, Mike </div><div style="font-family: arial,helvetica,sans-serif; font-size: 10pt;"> <div style="font-family: times new roman,new york,times,serif; font-size: 12pt;"><hr size="1">From: Michael Rans <mcarans@yahoo.co.uk> To: General PulseAudio Discussion <pulseaudio-discuss@mail.0pointer.de> Sent: Sat, 10 July, 2010 14:24:02 Subject: Re: [pulseaudio-discuss] {PATCH][RFC] AC3 passthrough support <meta http-equiv="x-dns-prefetch-control" content="off"><div style="font-family: arial,helvetica,sans-serif; font-size: 10pt;">Hi, Thanks for your reply both to my message and the bug I posted. I tried Colin's patch, but it didn't work for me. I tried the following evil hack in alsa-sink.c:         out_frames = snd_pcm_rewind(u->pcm_handle, (snd_pcm_uframes_t) in_frames);         if (out_frames < 0) {             out_frames = -out_frames;         } /*        if ((out_frames = snd_pcm_rewind(u->pcm_handle, (snd_pcm_uframes_t) in_frames)) < 0) {             pa_log("snd_pcm_rewind() failed: %s", pa_alsa_strerror((int) out_frames));             if (try_recover(u, "process_rewind", out_frames) < 0)                 return -1;             out_frames = 0;         }*/ The sound played but very very fast in Oolite, so I would say it almost worked. I can't find any definition of snd_pcm_rewind() in the alsa-plugins source code. Does this function call through to a function in the plugins? I understand that there a function snd_pcm_hw_params_can_rewind which I would guess should return false for AC3 encoding - is this called by Pulseaudio? Cheers, Mike <div> </div><div style="font-family: arial,helvetica,sans-serif; font-size: 10pt;"> <div style="font-family: arial,helvetica,sans-serif; font-size: 13px;"><hr size="1">From: Tanu Kaskinen <tanuk@iki.fi> To: pulseaudio-discuss@mail.0pointer.de Sent: Sat, 10 July, 2010 11:13:13 Subject: Re: [pulseaudio-discuss] {PATCH][RFC] AC3 passthrough support On Sat, 2010-07-10 at 08:05 +0000, Michael Rans wrote: > Even with these "hacks", I found that sometimes I see: > > I: module.c: Unloading "module-alsa-sink" (index: #4). > D: module-always-sink.c: Autoloading null-sink as no other sinks > detected. > > > After I see that, the sink disappears and cannot be selected any more > in sound properties. > > 1. Does the ac3-iec958 profile resolve any of these issues? What's "the ac3-iec958 profile"? The iec958-ac3-surround-* mappings that currently exist in pulseaudio use the a52 alsa plugin, which may or may not work with Colin's patch[1]. (It didn't work for Colin.) > 2. Jack has ac3jack. What would be the pros and cons of doing the AC3 > encoding in Pulseaudio instead of in Alsa? I think it would make sense to do AC3 encoding in Pulseaudio, although in theory I don't see what difference it would make. Maybe it's somehow benefical to handle all the buffering inside Pulseaudio. If there are timing related bugs in the a52 plugin, as Colin seems to think there are, then it's also a matter of who volunteers first: a person who knows how to fix the a52 plugin, or a person who knows how to hack AC3 encoding support into Pulseaudio. [1] <a rel="nofollow" target="_blank" href="https://tango.0pointer.de/pipermail/pulseaudio-discuss/2010-June/007311.html">https://tango.0pointer.de/pipermail/pulseaudio-discuss/2010-June/007311.html</a> -- Tanu Kaskinen _______________________________________________ pulseaudio-discuss mailing list <a rel="nofollow" ymailto="mailto:pulseaudio-discuss@mail.0pointer.de" target="_blank" href="mailto:pulseaudio-discuss@mail.0pointer.de">pulseaudio-discuss@mail.0pointer.de</a> <a rel="nofollow" target="_blank" href="https://tango.0pointer.de/mailman/listinfo/pulseaudio-discuss">https://tango.0pointer.de/mailman/listinfo/pulseaudio-discuss</a> </div></div> </div> <meta http-equiv="x-dns-prefetch-control" content="on"></div></div> </div> </body></html>