Due to quake's original sound engine using a push model, the actual place
to which the sound data should be written is not necessarily where the
"hardware" dma cursor is, but rather where the last write finished off.
Thus, the correct output location is indicated by snd_paintedtime rather
than snd_shm->framepos.
When jackd gets an unhandled xrun, it stops all processing but neglects to
tell the client about it. Thus, add a bit of a watchdog function to
s_update() and assume the client thread is dead if there's no sign of life
after one second. No more hanging on exit.
Wav file were not read correctly when encoutering most chunk type beside the ones used by QuakeForge.
This patch will fix the riff loader code so that unused but defined chunk are skipped. Most wav files should now be loaded correctly fixing some silent sound effect.
Also fixed a typo in wav loader and reordered wav validity check so that format is checked first. The data chunk could be inexistant on some weird format and so an invalid format is a more helpful error text.
! Fix: Skip unsupported chunk in riff loader instead of rejecting riff file.
! Fix: typo in Microsoft name.
! Fix: ordering of wav validity to enable more helpful error text.
This happens when qf fails to connect to jackd (possibly other times).
There is probably a better solution to the problem, but not opening a
stream when the sample rate is reported as 0 definitely fixes the inifinite
recursion in read_samples().
The sounds are down-mixed to 2 channels (qf does not (yet) support more than
2 channel output), but this allows pretty much anything to be used for a
source of music. Only 5.1 (6 channel), stereo and mono have been tested, but
the others should work (any issues would be mis-interpretation/implementation
of the channel layout).
the resampler is being badly abused for streams, and it's not yet properly
autoconfiscated, but things are working. Better yet, at the correct pitch and
speed.
Rather than using an ifdef around the entire code, get autoconf to do the work
for us. For one thing, this allows doxygen to produce decent docs. It also
makes for less compalation when building without support for various formats.
