[SDL] SDL2_mixer & ogg vorbis file for android. Problems in IC

Sik the hedgehog sik.the.hedgehog at gmail.com
Wed Mar 13 09:42:19 PDT 2013

Yeah, there's the issue that phones usually don't support hardware
accelerated Vorbis so they're horribly slow at that. You'll end up
with a scratchy sound because it can't keep up with the streaming (so
there are gaps in the buffer all the time).

If using Tremor doesn't fix it for you may want to consider other
alternatives. I suppose you're probably avoiding the hardware
accelerated formats as they're usually patented... An alternative
would be to decompress the entire Vorbis data in RAM, and if you need
to save space use DPCM, ADPCM or something like that (there's a Sega
Genesis sound engine called TMSE that can decompress two ADPCM streams
at 22KHz simultaneously on the 3.58MHz Z80, to give you an idea of how
lightweight are those two algorithms).

2013/3/13, Gabriele Greco <gabriele.greco at darts.it>:
> On Tue, Mar 12, 2013 at 6:16 PM, image28 <image28 at slingshot.co.nz> wrote:
>> **
>> Also I'm loading the ogg file from the apk files assets directory
> Are u using libtremor to decode the vorbis streams?
> I'm doing the same thing in my game and it works perfectly (but I had to
> get an updated version of libtremor since there are a few bugged versions
> around that exhibit their bugs when used with SDL_mixer).
> --
> Bye,
>  Gabry

More information about the SDL mailing list