mk-fg
commented
9 years ago So I've been looking into pjsua + pulseaudio, which would be kinda neat for integrating it with multiple sound streams from whatever sources (and mixed in whatever ways), but it's probably more trouble than it's worth.
pjsua doesn't have native support for pulse, i.e. using libpulse, connecting to pulse server(s), creating sinks and individual playback streams there, controlling whatever parameters - nothing of the sort, only works with sound devices through portaudio lib, which uses either ALSA or OSS on linux.
Strictly one playback_dev + one capture_dev from there at a time, so one can forget about feeding sound from these "proper" sources for e.g. #5.
But pjsua can also just play stuff from wav, and record to wav, and assuming it's not too smart about it, one can always put a fifo (as in mkfifo) in place of a wav (or - worst-case - a trivial FUSE layer to "emulate" wav or patch the smart bits out), and feed stuff there from whatever software audio mixer or player.
pj* itself has internal plumbing for audo - conference bridges/slots, so once audio is fed into pjsua, it can multiplex it to whatever callers via that.
mpd has "fifo" output plugin, so that's probably How It Should Be Done. "mute" is easier to control by unplugging that wav input from conference slot, but mpd should provide nicer fade-out and whatever effects, so sending "pause" there might be better.
danry25
Between calls I'd like to have a radio stream playing for people to listen to. Here is an example radio stream I'd like to play.
When an inbound call comes in, the radio stream should be muted so that the person making said call/announcement can be heard. After the call has ended, the radio stream should be unmuted so that employees and patrons can resume listening.
I think integration with mpd would cover this need, although I am open to using a different package if it would work better or be easier to integrate.