RE: [Gwc-general] gwc-0.20.08 -- hangs after playback

[Atwood, R. C <r.a...@im...>]

Sounds good! If anyone wants my quick fix for 0.20.08, here it is; I =
don't think this shoudl break anything and it adds very little overhead, =
and of course the message can be removed or relaced with g_print =
whatever that is... but if you have fixed the cause for the next version =
so much the better. on my system it ALWAYS hangs after playback, a =
problem that is hard to miss! so it must be system (sound card? driver =
module?) dependent if you or anyone has ever played back a selection =
without it hanging. I am guessing that it only plays complete blocks and =
reports back only integer multiples of the block size.

=20
I now understand why the tool buttons do not respond during this loop, =
the control never gets back to the gtk routines. Perhaps it would be a =
good idea to include something like this in order to ensure that the =
loop terminates eventually? or, set a limit on the number of loops?=20





audio_util.c

901 void stop_playback(int force)
 902 {
 903     if(!force) {
 904             /* Robert altered */
 905        int new_playback =3D audio_device_processed_bytes();
 906        int  old_playback;
 907         while(new_playback < playback_total_bytes) {
 908             /* Robert altered */
 909             //g_print("usleep 100\n") ;
 910             usleep(250) ;
 911             old_playback =3D new_playback;
 912             new_playback=3Daudio_device_processed_bytes();
 913             /* check if more samples have been processed, if =
not,quit */
 914             if (old_playback=3D=3Dnew_playback){
 915               fprintf(stderr,"Playback appears frozen\n =
Breaking\n");
 916               break;
 917             }
 918         }
 919         usleep(100) ;
 920     }
 921     audio_state =3D NOTHING ;
 922     audio_device_close() ;
 923 }
-----Original Message-----
From:	Jeff Welty [mailto:we...@ya...]
Sent:	Fri 1/7/2005 8:41 PM
To:	Atwood, Robert C
Cc:	gwc...@li...
Subject:	Re: [Gwc-general] gwc-0.20.08 -- hangs after playback
Thanks for the bug report.

I also caught the hanging problem and have a fix when 0.20-09 is=20
released.  What I wanted to achieve with
that little loop not closing the audio device prematurely, which I think =

is one source of a small clicking sound
at the end of playback.  I think, though, I haven't got the problem=20
licked, because even though the audio
device has receieve all the bytes in it's internal buffer, it hasn't=20
played them all.

0.20-09 will also have a fix for snapping to markers when the markers=20
are close to each other,
as well as a lowpass iir filter, and amplify can now mix/crossfade from=20
the left/right channels.

jw

Atwood, Robert C wrote:

> gwc certainly looks like it will serve the purpose of removing one=20
> more reason to run Windows on the machine! However, I experienced one=20
> significant problem already -- the program hangs when it reaches the=20
> end of a selected region upon play back.
>
> I debugged it, which led me to the following subroutine at=20
> audio_util.c:901
>
>
> ______________________________________
> void stop_playback(int force)
> {
>     if(!force) {
>         while(audio_device_processed_bytes() < playback_total_bytes) {
>             //g_print("usleep 100\n") ;
>             usleep(250) ;
>         }
>         usleep(100) ;
>     }
>     audio_state =3D NOTHING ;
>     audio_device_close() ;
> }
> ________________________________________
>
>=20