文件列表:

openh323 (0, 2003-08-28)
openh323\.cvsignore (135, 2003-06-30)
openh323\configure (145602, 2003-08-04)
openh323\configure.exe (184320, 2003-08-05)
openh323\configure.in (5570, 2003-08-04)
openh323\CVS (0, 2003-08-28)
openh323\CVS\Entries (964, 2003-08-28)
openh323\CVS\Repository (10, 2003-08-28)
openh323\CVS\Root (67, 2003-08-28)
openh323\dllcodecs (0, 2003-08-28)
openh323\dllcodecs\CVS (0, 2003-08-28)
openh323\dllcodecs\CVS\Entries (3, 2003-08-28)
openh323\dllcodecs\CVS\Entries.Log (19, 2003-08-28)
openh323\dllcodecs\CVS\Repository (20, 2003-08-28)
openh323\dllcodecs\CVS\Root (67, 2003-08-28)
openh323\dllcodecs\ilbccodec (0, 2003-08-28)
openh323\dllcodecs\ilbccodec\CVS (0, 2003-08-28)
openh323\dllcodecs\ilbccodec\CVS\Entries (256, 2003-08-28)
openh323\dllcodecs\ilbccodec\CVS\Repository (30, 2003-08-28)
openh323\dllcodecs\ilbccodec\CVS\Root (67, 2003-08-28)
openh323\dllcodecs\ilbccodec\draft-ietf-avt-ilbc-codec-01.txt (393880, 2003-04-28)
openh323\dllcodecs\ilbccodec\extract-cfile.awk (476, 2003-04-28)
openh323\dllcodecs\ilbccodec\ilbccodec.dsp (7174, 2003-04-28)
openh323\dllcodecs\ilbccodec\ilbccodec.dsw (541, 2003-04-28)
openh323\dllcodecs\ilbccodec\Makefile (573, 2003-04-28)
openh323\include (0, 2003-08-28)
openh323\include\.cvsignore (217, 2003-05-05)
openh323\include\channels.h (35142, 2002-09-16)
openh323\include\codecs.h (39103, 2003-07-16)
openh323\include\cu30codec.h (15021, 2002-10-10)
openh323\include\CVS (0, 2003-08-28)
openh323\include\CVS\Entries (2535, 2003-08-28)
openh323\include\CVS\Repository (18, 2003-08-28)
openh323\include\CVS\Root (67, 2003-08-28)
openh323\include\dllcodec.h (2202, 2003-04-30)
openh323\include\dynacodec.h (8782, 2003-04-30)
openh323\include\ffh263codec.h (12222, 2003-08-04)
openh323\include\g7231codec.h (6293, 2002-09-16)
openh323\include\g726codec.h (4942, 2002-11-09)
openh323\include\g729codec.h (6394, 2003-05-05)
... ...

OpenH323 Library ================ The OpenH323 project aims to create a full featured, interoperable, Open Source implementation of the ITU H.323 teleconferencing protocol that can be used by personal developers and commercial users without charge. OpenH323 development is coordinated by an Australian company, Equivalence Pty Ltd (http://www.equival.com), but is open to any interested party. Commercial and private use of the OpenH323 code, including use in commercial products and resale, is enouraged through use of the MPL (Mozilla Public license). For more details see http://www.openh323.org You can subscribe to the mailing list at http://www.openh323.org/mailman/listinfo Frequently asked questions are answered at http://www.openh323.org/faq.html Building the OpenH323 Code ========================== This page describes how to compile the OpenH323 code release. Note these instructions will always refer to the latest snapshot available on the download page. The OpenH323 source will have been compiled and tested under Linux x86, and Windows NT. If it does not compile for you then the problem is likely to be a setup/configuration problem with your system and not a problem with the source code itself. The libraries and applications should also compile on Windows 95/***, BeOS (thanks Yuri!), Linux PPC, FreeBSD x86, OpenBSD x86 (thanks Roger!) and Solaris Sparc & x86. They are not automatically compiled on every release however so there could be problems, but the chances are that there aren't. Note also that not all of these platforms may have ports of the sound interface. We are also happy to port it to other Unix flavours providing people out there can provide an account and a fair bit of disk space! These instructions should contain all of the steps need. If you have a problem, please double check that you have performed ALL of the steps below, particularly setting the include file paths under MSVC. Some of the more common errors are described below. If you get a lot of compile or link errors, then the chances are that you have missed something in the list. If you are positive that something is wrong and you have followed the instructions, then send an e-mail to the mailing list, and we'll answer it for everyone to see. Bear in mind that the first question asked will be "did you follow the instructions". Windows ------- 1. Download the pwlib_1.xx.zip and openh323_1.x.zip files from the OpenH323 download page. 2. Follow the instructions for building PWLib. 3. Start MSVC (v5 or v6). If you have another compiler you are on your own! Go into the Tools menu, Options item, Directories tab and add to the beginning of the Include files path (note the order is important!): C:\OpenH323\Include and add to the Lib Files path and the Executable Files path the following: C:\OpenH323\Lib Also make sure the last directory is in your PATH environment variable. Note this is in addition to the ones in PWLib!! 4. Use the OpenH323.dsw file to build the sample code, eg SimpH323. The build should automatically create a file openh323/include/openh323buildopts.h via the configure.exe program that should be in the openh323 directory. If you have any problems try running the program directly from a command line. Use ".\configure --help" to get information on options such as forcing a feature or library dependency. Note there are additional notes in the "Platform Specific Issues" on how to compile the various libraries in a manner suitable for use by OpenH323 under Windows. 5. Run the program, and you are on your own! Unix ---- 1. Download the pwlib_min_1.xx.tar.gz and openh323_1.xx.tar.gz files from the OpenH323 download page. 2. Follow the instructions for building PWLib. 3. Extract the contents of the openh323_1.x.tar.gz file somewhere, eg: cd tar -xzvf openh323_1.1alpha1.tar.gz 4. If you have not installed OpenH323 in your home directory (~/openh323) then you will have to define the environment variable OPENH323DIR to point to the correct directory. Also make sure you have added the $OPENH323DIR/lib directory to your LD_LIBRARY_PATH environment variable if you intend to use shared libraries (the default under Linux). There are examples for sh/bash and csh/tcsh below. 5. Build the H323 bootstrap code. This will automatically build the ASN compiler (in the $PWLIBDIR/tools/asnparser directory), though this should have already been built previously. Enter: cd $(OPENH323DIR) ./configure make opt This may take some time, especially with the h245_*.cxx and h225.cxx files. You may also need to add more swap space - ***M of real memory and ***M of swap might just be enough, if your machine does nothing else! Some people have reported needing as much as 256M of swap - if your compiler bombs out with a "virtual memory exhausted" error compiling h245_*.cxx and h225.cxx, then increase your swap space. Less space is required if you build the debug version - Debug builds on ***M ram are very achievable. Opt builds on 1***M ram are doable, but only just. 6. The result should be an executable called simph323, which will be located in a directory dependent on the platform, eg sample/simple/obj_linux_x86_d. To run it, use the following command: ./sample/simple/obj_linux_x86_r/simph323 and you should get the usage help text. 9. Now you're on your own! Voice Age G.729 Codec --------------------- For the Windows system it is possible to also have a G.729 codec for non-commercial use by adding the Voice Age G.729A library to the system. To do this: 1. Get the Voice Age G.729 library from http://www.voiceage.com/g729/ 2. Unpack it somewhere, preferably at teh same level as OpenH323, eg if c:\work\openh323, then c:\work\va_g729a 3. Re-run the configure program. 4. Recompile your project. H263 Support. ============= H263 is a video compression format which is especially suited for low bandwidth situations, such as a dial up link. By adding the requisite library, recompiling openh323 and ohphone applications, H263 support is available. Two H263 codecs are in the Openh323 codebase. 1)ffmpeg, and 2)vich263 1)ffmpeg. Note that the H.263 support in OpenH323 is not yet compliant with RFC 2190, which means it is not yet interoperable with applications like NetMeeting. OpenH323 implemented H263 using the ffmpeg library, which does NOT use the same license as OpenH323. Please read the license information at http://ffmpeg.sourceforge.net to ensure that your usage of this code is allowed. OpenH323 has labelled the H263 support from ffmpeg as non standard. Some non standard hacks were added to the packets generated by ffmpeg to get it working in a voip environment. To be absolutely certain of no license problems from ffmpegs LGPL/GPL, ffmpeg is dynamically opened by openh323 at run time with dlopen. 2)vich263 is more compliant than the ffmpeg version. Andrew Morrow who did the hard part of the implementation reports that: I got something working using vic's H.263 (not plus) in OpenH323. It does not interoperate with NetMeeting, but it does interoperate with IBM's J323/JMF. Unix ---- The library was built with cd external/ffmpeg ./configure --enable-shared --disable-a52 cd libavcodec make make install The code is in the CVS, external/ffmpeg directory at sourceforge. Instructions on using the cvs are at http://sourceforge.net/cvs/?group_id=80674 cd external/vich263 make make install ==== If you have the external directory on your box, with vich263 and ffmpeg, but do not wish to enable ffmpeg or vich263, you can cd openh323 /configure make on recompiling the openh323 directory, you will not do configure again, so your ffmpeg and vich263 settings will remain. Should you wish to build in support for both H263 codecs, do: export H323_VICH263=1 export H323_AVCODEC=1 cd openh323 /configure make Now, if you just want 1 codec, just have the appropriate export statement. Note that when you do ./configure, there is a clear statement what codec is on. If you wish to remove both codecs, (after doing a configure with them on), do export H323_VICH263="" export H323_AVCODEC="" cd openh323 /configure make Now, these settings are fixed, and remain in place on subsequent makes. Thus, on recompiling the openh323 dir, you don't need to rerun configure. Now, to test the operation of the H263 codec. I used the command below in the ohphone directory: ./obj_linux_x86_r/ohphone -ln --videotest --videolocal \ --videoreceive sdl --videodevice fake --videoinput 1 \ --videobitrate 24 This brings up a SDL display window with two copies of the same image. The image on the right is generated by the fake video device, on channel 1. The image on the left is the decoded form of an image that has been encoded with H263. Wait a while, and then type q, the display will tell you what bit rate was achieved, and the frame rate. The achieved bit rate should always be less than that specified in the --videobitrate option Now, you can try the H261 codec instead. To use H261, add to the command line -D 263, so your command line becomes: ./obj_linux_x86_r/ohphone -ln --videotest --videolocal \ --videoreceive sdl --videodevice fake --videoinput 1 \ --videobitrate 24 -D 263 Get mean, set a bit rate of 12 Kilobits/sec Now, you might have a problem with it not finding the libavcodec.so library. In this case, you need to extend your LD_LIBRARY_PATH export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/usr/local/lib or append to /etc/ld.so.conf the directory /usr/local/lib and rerun ldconfig ldconfig -C /etc/ld.so.conf Do this command as root. Alternatively, append to the configure command above the phrase --prefix=/usr. This will cause all the ffmpeg stuff to go in system directories, where it will be found guaranteed. Windows ------- The ffmpeg codec is built with MingW. There have been some valiant efforts to get ffmpeg to build under msvc. However, many many code changes were required. Consequently, the code became not standard with the source code. 1) move ffmpeg directory from c:\external to c:\msys\1.0\home\administrator 2) start msys 3) cd ffmpeg 4) do ./configure --cc="gcc -mno-cygwin -mms-bitfields" --with-mingw32 "gcc -mno-cygwin -mms-bitfields" --enable-shared --disable-a52 --disable-ffserver --disable-ffplay this configure command is in external/ffmpeg/windows file 5) cd libavcodec 6) make (don't worry about the message about symbols) 7) exit msys (just type exit) 8) move ffmpeg back to c:\external (opposite of step 1) 9) move c:\external\ffmpeg\libavcodec.dll to c:\openh323\lib 10) compile libvich263 Simply go to external\vich263 open the libvich263 workspace. select batch build, buld release and debug. leave libvich263.lib where it puts this library. 11) Open up a dos terminal go to c:\openh323 configure Check that options are set correctly in c:\openh323\include\openh323buildopts.h (note, openh323buildopts.h is from openh323buildopts.h.in) If it fails to build openh323buildopts.h, well, it is OK. copy from pwlib/tools/configure the files configure.cpp and configure.dsp to the directory c:\openh323 Open configure.dsp project in msvc, build and run configure.exe recompile the OpenH323Lib and OpenH323DLL projects to create new OpenH323 libraries. Common errors ------------- Here are common errors you might encounter for both Windows and Unix builds. An error like: "Makefile", line 175: Missing dependency operator "Makefile", line 177: Need an operator "Makefile", line 179: Missing dependency operator "Makefile", line 181: Need an operator "Makefile", line 183: Missing dependency operator "Makefile", line 185: Need an operator Indicates you are using BSD Unix's Make command. You need to use gmake (GNU Make). Thinking there are missing files. A number of files, eg h235.h, h225.h etc, are generated files that are created during the build process. If they are missing then something went wrong with the creation of the asnparser or your installation of flex/bison. An error like: /home/newbie/pwlib/tools/asnparser/obj_linux_x86_r/asnparser: error in loading shared libraries: libpt_linux_x86_r.so.1: cannot open shared object file: No such file or directory Indicates you have not set the LD_LIBRARY_PATH environment variable. There are examples for sh/bash and csh/tcsh. An error like: Linking... LINK : fatal error LNK1181: cannot open input file "ptlib.lib" Error executing link.exe. Indicates you have not set the paths in MSVC directories. An error like: Performing Bison Step c:\tools\share\bison.simple: No such file or directory C:\PWLIB\TOOLS\ASNPAR~1\BISON.EXE: Cannot move asn_grammar_tab.c - No such file or directory Cannot move asn_grammar_tab.h - No such file or directory Indicates you have not installed bison correctly. In particular the bison.simple file must be available to bison. Check the bison documentation for details on this. Attempting to compile GUI systems under Unix. There are a number of partial implementations of the GUI code in the $PWLIBDIR/src/pwlib directory tree. These are not required to get the OhPhone application compiled. If you get those systems from the CVS then you are basically on your own. Do not ask for support unless you intend to help with the implementation! See the FAQ at http://www.openh323.org/~openh323/fom.cgi for more. Example environment for sh/bash ------------------------------- PWLIBDIR=$HOME/pwlib export PWLIBDIR OPENH323DIR=$HOME/openh323 export OPENH323DIR LD_LIBRARY_PATH=$PWLIBDIR/lib:$OPENH323DIR/lib export LD_LIBRARY_PATH Example environment for csh/tcsh: setenv PWLIBDIR $HOME/pwlib setenv OPENH323DIR $HOME/openh323 setenv LD_LIBRARY_PATH $PWLIBDIR/lib:$OPENH323DIR/lib Bison problem under Unix ------------------------ The bison.simple file on many releases will not compile with the options used by the PWLib getdate.y grammar. The options are required to make the date parser thread safe so it is necessary to edit the bison.simple file to fix the problem. The file is usually at /usr/lib/bison.simple but in the tradition of unix could actually be anywhere. We leave it up to you to find it. The code: /* Prevent warning if -Wstrict-prototypes. */ #ifdef __GNUC__ int yyparse (void); #endif should be changed to /* Prevent warning if -Wstrict-prototypes. */ #ifdef __GNUC__ #ifndef YYPARSE_PARAM int yyparse (void); #endif #endif To prevent the incorrect function prototype from being defined. The getdate.y should then produce a getdate.tab.c file that will actually compile. Licensing --------- The bulk of this library is licensed under the MPL (Mozilla Public License) version 1.0. In simple terms this license allows you to use the library for any purpose, commercial or otherwise, provided the library is kept in tact as a separate entity and any changes made to the library are made publicly available under the same (MPL) license. It is important to realise that that refers to changes to the library and not your application that is merely linked to the library. Note that due to a restriction in the GPL, any application you write that uses anything another than GPL, eg our library with MPL, is technically in breach of the GPL license. However, it should be noted that MPL does not care about the license of the final application, and as only the author of the GPL application is in breach of his own license and is unlikely to sue themselves for that breach, in practice there is no problem with a GPL application using an MPL or any other commercial library. Portions of this library are derived from TOAST, using the copyright: Copyright 1992, 1993, 1994 by Jutta Degener and Carsten Bormann, Technische Universitaet Berlin Any use of this software is permitted provided that this notice is not removed and that neither the authors nor the Technische ... ...

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