Russell,
This sounds great!
I'm not sure that this interface makes sense for Pd. It's tempting to see if we can fit into something that exists, but my gut is telling me that Pd is a different animal that should be approached in a different way. Chris, in an earlier post mentioned using OSC, he was using a Python script, so communicating via OSC may be a starting point.
- I want to make it possible to develop interactive phone applications using
Pd. Basically, I want the audio from a call to go into Pd, and to get audio back out that is sent back in the caller.
Seems to me that perhaps a SIP soft phone may be trickier because rtp audio comes in on many ports, what about a Pd iax2 phone object and have it listen to the audio on port 4569?
- I also want to be able to hook Pd into the audio path of a call. So, the
audio coming from one side of the call is processed through a Pd patch before sent out to the other side of the call.
Is it possible to run Pd and Asterisk on the same machine? Like Icecast?
Best, Ryan Holsopple
On 12/2/07, Russell Bryant russell@russellbryant.net wrote:
Greetings,
I've been an Asterisk developer for a few years. I now lead the software team in charge of Asterisk at Digium, Inc. I just learned about Pd a few weeks ago when I met Hans. I think Pd is very cool, and I'm really excited to see what we can come up with to combine Pd and Asterisk.
I have been diving in head first to learn about how Pd works, and what the possibilities could be. However, I would like to discuss what the goals of "Pd
- Asterisk" are.
Coming up with the most powerful integration between the two will take two parts:
- What are the potential applications that we can dream up? I can provide
access to any aspect of a phone call. That includes the media streams and various bits of meta-deta, such as the digits that have been pressed. What can those of you that have the real knowledge about Pd think of that would be cool to do with a phone call?
- Given the applications above, what are the primitives required to accomplish
them? Both Asterisk and Pd are toolkits. It's all about breaking things down to a general solution that is the most flexible to accomplish current and future applications.
Hans-Christoph Steiner wrote:
Fun stuff, three of these. I had been vaguely thing of making some kind of AGI object for Pd. It would be nice to easily tap into Asterisk from Pd.
Just a quick bit of background. AGI is an interface that exists in Asterisk to use the programming language of your choice to control phone calls. It uses stdin/stdout or a TCP socket to send/receive text commands and responses.
I'm not sure that this interface makes sense for Pd. It's tempting to see if we can fit into something that exists, but my gut is telling me that Pd is a different animal that should be approached in a different way.
A softphone that uses Jack would be handy too... on that note, I wonder how hard it would be to make a softphone in Pd :)
A softphone in Pd? Ha ... I suppose it's possible. We can come back to this one. ;)
For now, I think I'd rather start with hooking Pd into Asterisk so that it becomes a part of a larger system. Asterisk can handle the phone calls part, and Pd gets to do what it is good at already.
I've been looking at [streamin~]/[streamout~] a bit this weekend. I am thinking of using that as an initial proof of concept to get audio from a phone call in and out of Pd. But, please yell at me if there is something else I should start with. In the end, I want to provide a couple of different things in regards to phone audio.
- I want to make it possible to develop interactive phone applications using
Pd. Basically, I want the audio from a call to go into Pd, and to get audio back out that is sent back in the caller.
- I also want to be able to hook Pd into the audio path of a call. So, the
audio coming from one side of the call is processed through a Pd patch before sent out to the other side of the call.
Finally, aside from the audio of a call, I want to be able to pass events into the Pd patch, as well. The first part of this would be any digits pressed on the phone, but there could be other things. Some telephony technologies allow text messages to be sent within a call, for example.
Anyway, those are just some initial thoughts. Let your mind wander, though. Telephones are everywhere, especially now that so many people carry cell phones. What could that mean for people using Pd in performances? interactive art projects? If you have some ideas, what can I do to make it possible? Just let me know. :)
-- Russell Bryant
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