Re: IAX2 Java library (was Re: [Asterisk-Users] New IAX software phone (for WIndows platform))
On Mon, 3 Nov 2003, Steven Critchfield wrote: So you bought that line of Marketecture didn't you. I think there are several large open source projects that prove that C is maintainable. Maintainability is really a function of organization. If you can't be organized, you will not produce very maintainable C code. s/C code/code/g Java might force organization somewhat, but if you're not organized, you still can make the code look like a complete mess. -- JustThe.net Internet New Media Services 22674 Motnocab Road * Apple Valley, CA 92307-1950 Steve Sobol, Proprietor 888.480.4NET (4638) * 248.724.4NET * [EMAIL PROTECTED] ___ Asterisk-Users mailing list [EMAIL PROTECTED] http://lists.digium.com/mailman/listinfo/asterisk-users
IAX2 Java library (was Re: [Asterisk-Users] New IAX software phone (for WIndows platform))
On 03/11/03 00:25, Mark Spencer wrote: As a side note, I strongly would like to see someone implement a client using libiax2 which implements IAX2 instead of the (now obsolescent) IAX version 1. I'm implementing a Java-based IVR server (and yes, I know Asterisk does IVR, and no, it's not flexible enough to do what I want and no, it doesn't integrate well with the Java systems we have, etc. hence my doing this). Currently it uses SIP (using the NIST JAIN-SIP stack) and JMF to handle RTP/audio stuff. I've found that JMF/RTP doesn't scale very well, as it spawns a *lot* of threads, and can't reliably handle more than 20 simultaneous calls. So, I'm investigating the possibility of writing an IAX library for Java. Searching the archives, it seems various other people would be interested in this. So, my questions are: - Should I implement IAX or IAX2? What's the main difference, other than IAX2 supporting trunking (which according to the docs needs a Zaptel timing source). - Has anyone else made any headway with this? - Is anyone else interested in making this an LGPL or even a GPL project and helping me with it? I'm likely to implement just the call management/DTMF/audio type stuff required for IVR initially (i.e. not worry about call xfer, etc.). It'll also be geared towards handling the hundreds of simultaneous calls required in a server environment, although there'll be no reason not to use it for IAX clients too. Obviously such a library would enable a nice GUI cross-platform IAX(2?) client to be easily created, which would be a nice by-product. -- Alastair Maw MX Telecom http://www.mxtelecom.com ___ Asterisk-Users mailing list [EMAIL PROTECTED] http://lists.digium.com/mailman/listinfo/asterisk-users
Re: IAX2 Java library (was Re: [Asterisk-Users] New IAX software phone (for WIndows platform))
Alastair Maw wrote: On 03/11/03 00:25, Mark Spencer wrote: As a side note, I strongly would like to see someone implement a client using libiax2 which implements IAX2 instead of the (now obsolescent) IAX version 1. I'm implementing a Java-based IVR server (and yes, I know Asterisk does IVR, and no, it's not flexible enough to do what I want and no, it doesn't integrate well with the Java systems we have, etc. hence my doing this). Are you mad? What is not flexable enough for you? Java knows what STDIN and STDOUT is, right? What more do you need? Jeremy McNamara ___ Asterisk-Users mailing list [EMAIL PROTECTED] http://lists.digium.com/mailman/listinfo/asterisk-users
Re: IAX2 Java library (was Re: [Asterisk-Users] New IAX software phone (for WIndows platform))
On 03/11/03 16:35, Jeremy McNamara wrote: I'm implementing a Java-based IVR server (and yes, I know Asterisk does IVR, and no, it's not flexible enough to do what I want and no, it doesn't integrate well with the Java systems we have, etc. hence my doing this). Are you mad? What is not flexable enough for you? Java knows what STDIN and STDOUT is, right? What more do you need? Not wanting to start a flamewar, but... - I can't possibly fork a whole JVM process for each caller. It's much too inefficient. This needs to support hundreds of simultaneous calls, and the GNU Java compiler just isn't good enough for our needs. I guess I could write an AGI wrapper script which connected to the Java server over a TCP connection or something and piped the stdin/out down the line to it. - We'd like to use Java because: - Need to do RMI to existing systems. Can't be bothered with all the CORBA nonsense. - It's more maintainable within our organization. - We have lots of existing components to support. - It does all the interoperability stuff we need very nicely, so we save time once the system is built (XML, etc.). - We like it. :) - I need access to the raw audio streams in realtime for various reasons (need to do DSP stuff for some clients, etc). Can I get this easily with AGI? Along with this, I need to be able to play audio from a URL. I don't want to have to download the whole file from the URL in order to play it - it wants to be streamed. Is this possible with AGI? The docs aren't very good for AGI, so I don't really know... - I need to be able to generate large amounts of audio in realtime, conference people together but then only play an audio file to one person within the conference, etc. I don't think AGI is flexible enough to do this. - I'd like to be able to move from Asterisk to something else if I need to. This is why originally I was doing things using SIP/RTP. - The documentation for AGI is very poor. I know it is for IAX, too, but I can see a Java IAX library being useful for client development too, and I'd like to give a little back to the * community, you know? There are other reasons, but I haven't the time to explain right now. The above are the most important. -- Alastair Maw MX Telecom http://www.mxtelecom.com ___ Asterisk-Users mailing list [EMAIL PROTECTED] http://lists.digium.com/mailman/listinfo/asterisk-users
Re: IAX2 Java library (was Re: [Asterisk-Users] New IAX software phone (for WIndows platform))
On 03/11/03 18:02, Alastair Maw wrote: I'm implementing a Java-based IVR server (and yes, I know Asterisk does IVR, and no, it's not flexible enough to do what I want and no, it doesn't integrate well with the Java systems we have, etc. hence my doing this). Are you mad? What is not flexable enough for you? Java knows what STDIN and STDOUT is, right? What more do you need? snip There are other reasons, but I haven't the time to explain right now. The above are the most important. Additionally, I'd like to spread the load across two machines - one for the PSTN/SIP/IAX routing and one for the IVR software. -- Alastair Maw MX Telecom http://www.mxtelecom.com ___ Asterisk-Users mailing list [EMAIL PROTECTED] http://lists.digium.com/mailman/listinfo/asterisk-users
Re: IAX2 Java library (was Re: [Asterisk-Users] New IAX software phone (for WIndows platform))
On Mon, 2003-11-03 at 12:02, Alastair Maw wrote: On 03/11/03 16:35, Jeremy McNamara wrote: I'm implementing a Java-based IVR server (and yes, I know Asterisk does IVR, and no, it's not flexible enough to do what I want and no, it doesn't integrate well with the Java systems we have, etc. hence my doing this). Are you mad? What is not flexable enough for you? Java knows what STDIN and STDOUT is, right? What more do you need? Not wanting to start a flamewar, but... Awww, come on, they are fun, right? (more below that isn't joking around) - I can't possibly fork a whole JVM process for each caller. It's much too inefficient. This needs to support hundreds of simultaneous calls, and the GNU Java compiler just isn't good enough for our needs. I guess I could write an AGI wrapper script which connected to the Java server over a TCP connection or something and piped the stdin/out down the line to it. Good reason maybe not to support Java, but you are correct in the potential interface. - We'd like to use Java because: - Need to do RMI to existing systems. Can't be bothered with all the CORBA nonsense. - It's more maintainable within our organization. - We have lots of existing components to support. - It does all the interoperability stuff we need very nicely, so we save time once the system is built (XML, etc.). - We like it. :) Ohhh, Java weenies stick together. ;) - I need access to the raw audio streams in realtime for various reasons (need to do DSP stuff for some clients, etc). Can I get this easily with AGI? Along with this, I need to be able to play audio from a URL. I don't want to have to download the whole file from the URL in order to play it - it wants to be streamed. Is this possible with AGI? The docs aren't very good for AGI, so I don't really know... No, you can not get to this all easily with AGI. AGI currently will play files on a currently mounted filesystem. Audio can be gotten out of it, but it is in a strange manner, and is only half of the requirement you listed. Sounds like you really need a C programmer and get into the guts of asterisk. Can't get more flexible than having the source code yourself to do anything you want. You could add your DSP routines into the dsp.c file and call them when needed. You can also write a asterisk application and have direct access to all the audio in every direction just as you want it. - I need to be able to generate large amounts of audio in realtime, conference people together but then only play an audio file to one person within the conference, etc. I don't think AGI is flexible enough to do this. Meetme is doing the conferencing real well already, maybe needs a little tweeking to fully meet your needs, but it is a known working bit of code. - I'd like to be able to move from Asterisk to something else if I need to. This is why originally I was doing things using SIP/RTP. What else is there worth using??? Are you one of those people who always develops apps thinking, what if someone buys this and wants to run it on Oracle? or atleast something to that idea. - The documentation for AGI is very poor. I know it is for IAX, too, but I can see a Java IAX library being useful for client development too, and I'd like to give a little back to the * community, you know? Actually they documentation is just programmer oriented. The documentation is included as example scripts and the section of apps/app_agi.c that contains a nice description of each function that is available. You can even do the following from the CLI, show agi to give you a list of agi commands, and show agi command to get the paragraph or more of description of what each command does. This is one of the few parts of asterisk where the documentation actually shines pretty well. There are other reasons, but I haven't the time to explain right now. The above are the most important. -- Steven Critchfield [EMAIL PROTECTED] ___ Asterisk-Users mailing list [EMAIL PROTECTED] http://lists.digium.com/mailman/listinfo/asterisk-users
Re: IAX2 Java library (was Re: [Asterisk-Users] New IAX software phone (for WIndows platform))
On Mon, 2003-11-03 at 13:49, Alastair Maw wrote: On 03/11/03 18:02, Alastair Maw wrote: I'm implementing a Java-based IVR server (and yes, I know Asterisk does IVR, and no, it's not flexible enough to do what I want and no, it doesn't integrate well with the Java systems we have, etc. hence my doing this). Are you mad? What is not flexable enough for you? Java knows what STDIN and STDOUT is, right? What more do you need? snip There are other reasons, but I haven't the time to explain right now. The above are the most important. Additionally, I'd like to spread the load across two machines - one for the PSTN/SIP/IAX routing and one for the IVR software. Unless the IVR is way over bloated, or the routing you mention incurs heavy codec costs, one machine is fine. -- Steven Critchfield [EMAIL PROTECTED] ___ Asterisk-Users mailing list [EMAIL PROTECTED] http://lists.digium.com/mailman/listinfo/asterisk-users
Re: IAX2 Java library (was Re: [Asterisk-Users] New IAX software phone (for WIndows platform))
- Should I implement IAX or IAX2? What's the main difference, other than IAX2 supporting trunking (which according to the docs needs a Zaptel timing source). IAX2 without any question. You will not be required to run trunk mode in your case, especially if you're just doing it locally, but IAX2 is highly consistent and can be very easily parsed (see iax-parser.c in libiax2 / asterisk) Mark ___ Asterisk-Users mailing list [EMAIL PROTECTED] http://lists.digium.com/mailman/listinfo/asterisk-users
Re: IAX2 Java library (was Re: [Asterisk-Users] New IAX software phone (for WIndows platform))
On 03/11/03 20:03, Steven Critchfield wrote: Sounds like you really need a C programmer and get into the guts of asterisk. Can't get more flexible than having the source code yourself to do anything you want. You could add your DSP routines into the dsp.c file and call them when needed. You can also write a asterisk application and have direct access to all the audio in every direction just as you want it. But C isn't as maintainable as nice Java apps, and it's as simple as that. Basically, I'm after the most powerful interface possible to Asterisk, but trying to make it as friendly as possible to code things against. As far as our organization is concerned, that pretty much means Java objects. - I'd like to be able to move from Asterisk to something else if I need to. This is why originally I was doing things using SIP/RTP. What else is there worth using??? Are you one of those people who always develops apps thinking, what if someone buys this and wants to run it on Oracle? or atleast something to that idea. There isn't anything else worth using. :) But there might be in six months' time. Or we might want to plug the IVR into something with far more channels than an E1 that has a Cisco badge on the front and talks SS7 (although I guess we can always break that into a T1 channel bank or whatever and plug T1s into the TE405Ps we have on order). - The documentation for AGI is very poor. Actually they documentation is just programmer oriented. The documentation is included as example scripts and the section of apps/app_agi.c that contains a nice description of each function that is available. snip I shall look into that. Thanks. :) -- Alastair Maw MX Telecom http://www.mxtelecom.com ___ Asterisk-Users mailing list [EMAIL PROTECTED] http://lists.digium.com/mailman/listinfo/asterisk-users
Re: IAX2 Java library (was Re: [Asterisk-Users] New IAX software phone (for WIndows platform))
On Mon, 2003-11-03 at 16:27, Alastair Maw wrote: On 03/11/03 20:03, Steven Critchfield wrote: Sounds like you really need a C programmer and get into the guts of asterisk. Can't get more flexible than having the source code yourself to do anything you want. You could add your DSP routines into the dsp.c file and call them when needed. You can also write a asterisk application and have direct access to all the audio in every direction just as you want it. But C isn't as maintainable as nice Java apps, and it's as simple as that. Basically, I'm after the most powerful interface possible to Asterisk, but trying to make it as friendly as possible to code things against. As far as our organization is concerned, that pretty much means Java objects. So you bought that line of Marketecture didn't you. I think there are several large open source projects that prove that C is maintainable. Maintainability is really a function of organization. If you can't be organized, you will not produce very maintainable C code. I'll point out that I am not a C programmer, but making patches to asterisk isn't that difficult. I have also made patches to the kernel without too much hair pulling. -- Steven Critchfield [EMAIL PROTECTED] ___ Asterisk-Users mailing list [EMAIL PROTECTED] http://lists.digium.com/mailman/listinfo/asterisk-users
