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Date:      Tue, 15 Mar 2022 15:28:16 +0100
From:      Robert Clausecker <fuz@fuz.su>
To:        Emanuel Haupt <ehaupt@freebsd.org>
Cc:        ports@freebsd.org
Subject:   Re: SDL audio issue with hivelytracker (porting attempt)
Message-ID:  <YjCigEoW18UpbkEG@fuz.su>
In-Reply-To: <20220315150003.3bd1c699db4995dc1d3fe007@FreeBSD.org>
References:  <20220315124908.205a07fc8dec2d0c5d6c6e92@FreeBSD.org> <YjCIgm/yYeJcZe6v@fuz.su> <20220315150003.3bd1c699db4995dc1d3fe007@FreeBSD.org>

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Hi Emanual,

It does not look like you adjust any buffer size, but that might be
handled by code not shown in the patch.

If that's not the issue, I don't have any obvious ideas.

Yours,
Robert Clausecker

Am Tue, Mar 15, 2022 at 03:00:03PM +0100 schrieb Emanuel Haupt:
> Robert Clausecker <fuz@fuz.su> wrote:
> > Hi Emanuel,
> > 
> > This is a common issue I had with multiple ports (the latest being
> > emulators/fceux).  The fragment size must be patched to be a power of
> > 2 and the buffer for the fragments must be resized to be at least as
> > large as the fragment size (iirc).  This might be the reason why you
> > get a signal.
> > 
> > The fragment size is set in the SDL_AudioSpec structure member samples
> > passed to SDL_OpenAudio(). 
> > 
> > Try to find this call and patch it.
> 
> I already did that (see also original post):
> https://github.com/ehaupt/ports-wip/blob/master/ports/audio/hivelytracker/files/patch-replay.c
> 
> This solved the initial issue but now I'm having problems with the
> playback.
> 
> > Yours,
> > Robert Clausecker
> > 
> > Am Tue, Mar 15, 2022 at 12:49:08PM +0100 schrieb Emanuel Haupt:
> > > I've been trying to port the hivelytracker to FreeBSD. After a lot
> > > of patching I was finally able to start it with:
> > > 
> > > SDL_AUDIODRIVER=disk
> > > 
> > > with dsp (default) I would always get:
> > > 
> > > Fragment size must be a power of two
> > > 
> > > when
> > > 
> > > SDL_OpenAudio(...)
> > > 
> > > was called.
> > > 
> > > I did some further digging and found some useful references in:
> > > 
> > > https://cgit.freebsd.org/ports/tree/audio/faudio/files/patch-src_FAudio__platform__sdl2.c
> > > 
> > > With this patch I was able to get the player to launch without the
> > > above error:
> > > 
> > > https://github.com/ehaupt/ports-wip/blob/master/ports/audio/hivelytracker/files/patch-replay.c
> > > 
> > > The player now starts:
> > > 
> > > I can click on 'Load Mod', load a sample mod but as soon as I get
> > > 'Play Song' I get:
> > > 
> > > Abort trap (core dumped)
> > > 
> > > I've been trying to get some sense by running it with truss but
> > > haven't been very successful so far.
> > > 
> > > The work in progress port can be found here:
> > > https://github.com/ehaupt/ports-wip/tree/master/ports/audio/hivelytracker
> > > 
> > > The port still needs some TLC (hardcoded paths, etc...). I'll fix
> > > that before adding the port.
> > > 
> > > Could someone with SDL audio experience please have a look? I'd
> > > appreciate the help.
> > > 
> > > Emanuel
> > > 
> > > 
> > > [1] https://github.com/pete-gordon/hivelytracker
> > > 
> > 
> > -- 
> > ()  ascii ribbon campaign - for an 8-bit clean world 
> > /\  - against html email  - against proprietary attachments
> > 
> 

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