[MPlayer-users] Latest SVN audio sync & high cpu usage with channels=6

[Jesús Guerrero]

On Tue, 29 Sep 2009 16:23:59 +0200, Reimar Döffinger
<Reimar.Doeffinger at gmx.de> wrote:
> On Tue, Sep 29, 2009 at 03:23:52PM +0200, Jesús Guerrero wrote:
>> On Tue, 29 Sep 2009 10:09:39 +0200, Reimar Döffinger
>> <Reimar.Doeffinger at gmx.de> wrote:
>> > 3) add the patch even further below and tell me what changes (if
>> > anything)?
>> > 
>> > Index: libao2/ao_alsa.c
>> > ===================================================================
>> > --- libao2/ao_alsa.c    (revision 29731)
>> > +++ libao2/ao_alsa.c    (working copy)
>> > @@ -763,8 +763,10 @@
>> >  
>> >  static int play(void* data, int len, int flags)
>> >  {
>> > -  int num_frames = len / bytes_per_sample;
>> > +  int num_frames;
>> >    snd_pcm_sframes_t res = 0;
>> > +  len = len / ao_data.outburst * ao_data.outburst;
>> > +  num_frames = len / bytes_per_sample;
>> >  
>> >    //mp_msg(MSGT_AO,MSGL_ERR,"alsa-play: frames=%i,
>> >    //len=%i\n",num_frames,len);
>> 
>> Attached output as patch2.output.txt.bz2, this patch solves the problem
>> completely, in the attached log, the A-V sync is always zero :)
> 
> Ok, so it is that old issue then. I would think it really shouldn't
happen
> with all your files then, useless ALSA extremely dislikes when it
> doesn't get a full outburst.

It happens only with ac3 files, and only when I enable surround (using
stereo they work fine). I can't guarantee that it happens in all the files,
but it happens in all the files I tried when this two conditions are met. 

I really long for the day that Linux will have a working unified sound
system with midi support that's broadly support by all the applications,
which is what keeps from away from oss4.
-- 
Jesús Guerrero