[sdlsound] SMPEG

[Eric Wing]

Whoops, sorry again. I think the Vorbis problem you
described was addressed in a patch that I submitted to
SDL_sound about a month ago. It's currently in the
CVS. It will now make SDL_sound return a full buffer
like with the other codecs (barring nasty corner
cases).

-Eric


--- Ted Kulp <wishy at comcast.net> wrote:
> Doh!  Oh well, I spent the weekend ripping out the
> libao stuff and using
> SDL only.
> 
> This actually wasn't a big deal to do, until I got
> to the ogg stuff. 
> SMPEG sends a full buffer worth of data, but
> libvorbis does not.  It took
> me most of the weekend to figure out how to split
> the decoded data up into
> chunks that would fit perfectly into the *stream
> buffer.  Once I got it
> working, it was fine, but I still could have avoided
> the problem.
> 
> Oh well, I learned a little about the internals of
> SDL and SDL_sound in
> the process, so all was not lost. :)
> 
> Thanks again,
> Ted
> 
> >
> > Sorry if this is late (I currently have limited
> > internet access).
> >
> > If you're using other sound libraries other than
> SDL
> > with SDL_sound, after the Sound_Init() call, try
> doing
> > SDL_QuitSubsystem(SDL_INIT_AUDIO). I had to do
> this
> > hack to get SDL_sound to work with OpenAL for
> SMPEG
> > because I also had the SMPEG silence problem.
> > Disabling it for me reactivated SMPEG.
> >
> > It seems that the SDL_InitSubsystem() call in
> > SDL_Sound is sort of a 'half-way to hell'
> scenario.
> > You either need to fully enable SDL audio yourself
> to
> > get SMPEG playback, or you need to fully
> > disable SDL audio and use your alternative audio
> > system.
> >
> > Ryan, perhaps this should be removed from
> SDL_sound
> > unless there are other reasons to init the audio
> > system.
> > It seems reasonable to me that if a person intends
> to
> > use SDL_Audio, they should be responsible for
> calling
> > SDL_InitSubsystem() and SDL_OpenAudio() themselves
> and
> > it's no fault of SDL_sound if they don't.
> >
> > Thanks,
> > Eric
> >
> >
> >
> > --- Ted Kulp <wishy at comcast.net> wrote:
> >> Thanks for your help.  Time for me to figure out
> how
> >> to do sound in SDL.
> >> I'm still using libao from when the program was
> ogg
> >> only.  I only put SDL
> >> in to use SDL_sound (and get easy MP3 support).
> >> Guess it's time to rip
> >> out the libao stuff and go SDL only.
> >>
> >> Thanks again,
> >> Ted
> >>
> >> >
> >> >> If I enable SMPEG, I get no sound.  Nada. 
> It's
> >> filling the buffer with
> >> >> data, because I have my counter working from
> the
> >> size of the data in the
> >> >> buffer, and it's full everytime.  If I disable
> >> SMPEG, everytime I play a
> >> >> file with id3v2 tags, I get garbage and it
> just
> >> moves on to the next
> >> >> song.
> >> >
> >> > SMPEG requires you to have the audio device
> opened
> >> through SDL_OpenAudio()
> >> > before decoding. This is a stupid requirement,
> but
> >> that's how it is at the
> >> > moment. That's the usual cause of problems.
> >> >
> >> > The other MP3 decoder (mpglib) doesn't deal
> with
> >> file corruption at all,
> >> > and doesn't understand ID3v2 tags. There's a
> hack
> >> to discard ID3v1 tags
> >> > before passing them to the decoder, and the
> same
> >> could be done for ID3v2,
> >> > I suppose.
> >> >
> >> > --ryan.
> >> >
> >> >
> >> >
> >> >
> >>
> >>
> >> Ted Kulp
> >> wishy at comcast.net
> >> www.wishy.org
> >>
> >
> >
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> 
> 
> Ted Kulp
> wishy at comcast.net
> www.wishy.org
> 


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