[xine-devel] audio output issues

[Guenter B. <bar...@st...>]

Hi everyone,

there are some issues with the audio drivers and I just wanted to
summarize them here. Perhaps you got comments, patches ... and it would be
great if you could drop me a line about who is working on what so we can
coordinate our efforts and I can estimate which feature will go into which
release.

ok, here we go:

- the alsa driver seems to have synchronization problems - I've had
  reports that you can get it out of sync by toggling fullscreen mode
  I think somebody should check this.

- there are quite a few audio boards out there that can't do
  48 kHz sampling rate so we need the downsampling capability.
  SDL seems to be one solution, but I think it would be nice if we
  could do that without SDL as well. Perhaps we can draw some code
  out of SDL? 

  SDL-1.1.6/src/audio/SDL_audiocvt.c

  looks like a good point to start

- alsa once again: Siggi told me that you can still use ALSA output even
  when native OSS drivers are loaded; but if you do there is no audio
  playback - so there seems to be a problem with ALSA driver detection

wishlist:

- digital AC3/AC5 (dts) output

- 4-channel surround sound via ALSA

- better/faster 5->2 channel downmix functions. Again, SDL seems to have
  nice routines for this (SDL_mixer.c)

- compare our libac3 to the current ac3dec from linuxvideo.org and see
  if there has been any valuable progress on their side 

ok - hoping for comments :-)

   Guenter

-- 
   xine - a free video player

bringing DVD/VCD playback to linux

   http://xine.sourceforge.net