Hello Pulseaudio community,<div><br></div><div>I'm playing around with pulse to assess suitability for my project, and while it seems like I should be able to do what I want, I'm struggling with the API. Essentially, I need to record audio data with precise (~1ms) time stamps. I'm doing collaborative sound source localization between several machines, all synced to gps time. Since I don't really need sample-accurate time, I figured it would be acceptable to call gettimeofday() on ALSA interrupts to get a pretty good idea of when the samples were recorded. Since all of the machines will be using the same hardware, I don't even care if there's some fixed latency involved. While doing this in ALSA would be an interesting project, when combined with some the other things I need to do (stream splitting, fixed-point resampling, etc.), it feels like I'd be reinventing the wheel. I've been using JACK to accomplish what I need, but there are stability and support issues on the embedded systems I'm using, so I'm looking into alternatives, especially since the recent headless ubuntu release, which has a working pulse server by default :)</div>
<div><br></div><div>I've tried cobbling something together using the pacat.c source using pa_stream_set_read_callback(). My callback gets called, but although I call pa_stream_get_timing_info(), I can't see how to derive the information I need from the pa_timing_info struct because I can't see how the timestamp field is related to the current fragment. </div>
<div><br></div><div>I'm not even sure if I'm going about this the right way, so if anyone who knows the system could give me a few pointers, I'd really appreciate it.</div><div><br></div><div>Thanks,</div><div>
Matt </div><div><br></div>