On Tue, 29 Sep 2009 16:23:59 +0200, Reimar D?ffinger
<Reimar.Doeffinger at gmx.de> wrote:
> On Tue, Sep 29, 2009 at 03:23:52PM +0200, Jes?s Guerrero wrote:
>> On Tue, 29 Sep 2009 10:09:39 +0200, Reimar D?ffinger
>> <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.
--
Jes?s Guerrero
