Revision SVN 8 - fix documentation - diff at proper level Revision SVN 6 - convert to using subversion - update the documentation - support for Asterisk 1.2.x Revision 1.7 (2006-09-03) - update Intel filenames in documentation, use IPP 4.1.2 instead of 4.1 Revision 1.6 (2005-09-03) - unified G.723.1 and G.729 patches into a single diff, so you can study both more easily - fix memory leak - thanks to Rafael for spotting the missing `!' in Intel's code - compile the command line encoder and decoder for G.729 such that they produce raw G.729 rather than ITU demonstration bitstreams. - add Debian packaging files - add runme.sh Revision 1.5 - libimf.so and libimf.a notes Revision 1.4 - static linking - compiler optimizations Revision 1.3 - added Intel links - fixed patch command - added notes about build dependencies Prerequisites ------------- - This code has been compiled with gcc 4. To use with gcc 3, you may need to change the `-mtune' to `-mcpu' in makeopts, and some other small changes. Step 1a ------- Download the code from Intel cd /tmp wget ftp://download.intel.com/software/products/ipp/downloads/samples/l_ipp-sample-speech-coding_p_4.1.008.tgz wget ftp://download.intel.com/software/products/ipp/downloads/l_ipp_ia32_itanium_p_4_1_2.tar Step 1b ------- Install Asterisk header files On Debian, just type apt-get install asterisk-dev apt-get build-dep asterisk Specifically, you need the *.h files that come with Asterisk Step 2a ------- Register with Intel See http://www.intel.com/software/products/ipp/ a) register on Intel's site under the 'free non-commercial use' section b) obtain the license number and a license key file c) put the license key file in the place specified by Intel's documentation d) run the installer Step 2b ------- Install IPP libraries. (For more detailed help with this stage, see http://www.readytechnology.co.uk/open/ipp-codecs/intel-notes/ipp-4.1.2.txt ) mkdir /tmp/ipp-tmp cd /tmp/ipp-tmp tar xf /tmp/l_ipp_ia32_itanium_p_4_1_2.tar Follow Intel's instructions to install IPP. If using Debian, the Intel installed will stop half way, leaving a .rpm file sitting in a subdirectory of /tmp. You can install the .rpm file using `alien' and then proceed. Intel's instructions and licensing information (including Open Source version information) are at http://www.intel.com/software/products/ipp/ Once you've installed IPP and agreed to the license terms, you may need to copy the libraries from one PC to another (eg, from your development machine to a production server). You just need to copy the contents of the following directory: /opt/intel/ipp41/ia32_itanium/sharedlib/ without re-running the install process. If you use static linking (now the default method), you DON'T need to copy the libraries onto every computer where you run the codec. You only need the libraries on the computer where you compile the codec. Step 3 ------ Install IPP sample code cd /usr/local/src tar xzf /tmp/l_ipp-sample-speech-coding_p_4.1.008.tgz Step 4 ------ Apply my patch cd ipp_sample/ patch -p0 < /tmp/ipp-svn8.diff Step 4a ------- Select compiler optimizations vi speech-coding/makeopts Note: if you optimize for a more modern processor than the processor in your machine, the codec will not run and Asterisk will not start. The default is Pentium 4. If you have a Pentium III, you must change the optimizations. Step 5a ------- If you have icc 8.0 libimf, move intel_cc_80/lib/libimf.so to somewhere out of the way. This will allow you to link libimf.a statically with codec_g729.so Step 5b ------- ************************************** * New: * * If NOT using Debian: * * chmod a+x runme.sh * * ./runme.sh * * or * * chmod a+x runme.sh * * ./runme.sh install * * * * If you are using Debian: * * * * chmod a+x runme.sh debian/rules * * dpkg-buildpackage -rfakeroot * ************************************** Step 6 ------ Deploy cp codec_g72*.so /usr/lib/asterisk/modules (the target location depends on your system) or just do ./runme.sh install or if using Debian, dpkg -i ../asterisk-ipp-codecs_1.0-1_i386.deb If you haven't used static linking (now the default), modify /etc/init.d/asterisk: export LD_LIBRARY_PATH=/opt/intel/ipp41/ia32_itanium/sharedlib:/opt/intel/ipp41/ia32_itanium/sharedlib/linux32:$LD_LIBRARY_PATH You may need to insert the following into your sip.conf, iax.conf, h323.conf, etc: allow=g729 Now restart Asterisk /etc/init.d/asterisk restart Step 7 ------ Verify install At the shell prompt: # asterisk -r At the Asterisk prompt: >show translation If the G.723.1 and G.729 columns have -'s instead of numbers, then the codecs are not working properly. ============================ COMMAND LINE ENCODER/DECODER ============================ G.729 only at present Do you want to record greetings and IVR messages in G.729 format so that your CPU doesn't have to transcode every time a call takes place? Most likely, yes, you do want this. Now you can. The original Intel command line encoder and decoder utilities (g729fpencoder and g729fpdecoder) work with bitstream files in a special format used by the ITU test suite. This is not the same format that Asterisk expects when reading/writing raw G.729. The utilities `my_enc' and `my_dec' have been designed to work with the raw format. Files generated by `my_enc' can be read by Asterisk without any transcoding. Usage: my_enc audio.raw audio.g729 my_dec audio.g729 audio.raw Where: audio.raw must be - 16 bit signed linear audio, - mono, - 8000Hz sample rate To convert a WAV file into the raw uncompressed audio before feeding it to `my_enc', you would use the `sox' utility (available on all Unix systems): sox audio.wav -t raw -r 8000 -s -w -c 1 audio.raw To convert a GSM file (such as those distributed with Asterisk), do: sox audio.gsm -t raw -r 8000 -s -w -c 1 audio.raw
opentelecoms-org/ipp_audio_codecs
Intel IPP audio codecs including G.729 and G.723.1 adapted for Asterisk
C