The streams.h documentation tells how the write pointer can be moved with pa_stream_write() - and reset with pa_stream_flush(). But AFAICS there is no way to move the write pointer without writing anything. pa_stream_write() has assertion on data not being NULL and doesn't move the pointer if nbytes is 0. Is there some kind of trick that can be used? Would it make sense to change PA so pa_stream_write() accepts a NULL pointer if nbytes is 0 and then just moves the write pointer? (Is the behaviour of pa_stream_write() with nbytes = 0 currently well-defined and working correctly? I have seen some strange some strange errors because of that - but that might be because I don't know what to expect.) /Mads using pulseaudio-0.9.15-17.fc11.i586
