G.729 Codec FreeSWITCH
Intel G.729 Codec on FreeSWITCH
== Introduction ==
Intel Primive Performance (IPP) Library is available at no cost for educational, research and non-commercial purpose.
We compile a new FreeSWITCH module for G729 codec based on IPP libraries.
== Method ==
Install Required Packages
sudo apt-get install build-essential uuid-dev
The G729 IPP module for Asterisk is better maintained than that of FS. Therefore, we can use asterisk-g72x configure script and resulting Makefile to get proper compile flags for FS.
hg clone https://bitbucket.org/arkadi/asterisk-g72x
cd asterisk-g72x
./configure —with-ipp=/opt/intel/ipp
make all
Once we are sure that this compiles without errors, we can use LDFLAGS and other flags from the Makefile for fsg729 module.
hg clone https://code.google.com/p/fs-g729/
cd fs-g729
Change the Makefile to this
$cat Makefile
IPPARCH=x86_64
LARCH=$(IPPARCH)
CC=cc
FSBASE=/usr/local/freeswitch
IPPBASE=/opt/intel
IPPCORE=m7
CC_OPT=-fPIC -O3 -DIPPCORE_STATIC_INIT -DG729A_ENABLE -fomit-frame-pointer -march=native -fno-exceptions
INCLUDE=-I$(IPPBASE)/ipp/include -include “$(IPPBASE)/ipp/tools/intel64/staticlib/ipp_$(IPPCORE).h” -I$(FSBASE)/include -I$(FSBASE)/libs/libteletone/src
LDFLAGS =-Wl,-static -L”$(IPPBASE)/ipp/lib/intel64” -L”$(IPPBASE)/lib/intel64” -avoid-version -module -lippsc_l -lipps_l -lippcore_l
all : decg729.o encg729.o owng729.o vadg729.o aux_tbls.o libg729.o mod_ipp_g729.o
$(CC) $(INCLUDE) -shared -O2 -Wall -Xlinker -x -o mod_ipp_g729.so \
mod_ipp_g729.o libg729.o decg729.o encg729.o owng729.o vadg729.o aux_tbls.o \
-lm $(LDFLAGS) -L/usr/local/lib -Wl,-Bdynamic $(FSBASE)/lib/libfreeswitch.so -pthread -lrt -luuid -lcrypt
decg729.o : decg729.c
$(CC) $(CC_OPT) -c decg729.c $(INCLUDE)
encg729.o : encg729.c
$(CC) $(CC_OPT) -c encg729.c $(INCLUDE)
owng729.o : owng729.c
$(CC) $(CC_OPT) -c owng729.c $(INCLUDE)
vadg729.o : vadg729.c
$(CC) $(CC_OPT) -c vadg729.c $(INCLUDE)
aux_tbls.o : aux_tbls.c
$(CC) $(CC_OPT) -c aux_tbls.c $(INCLUDE)
libg729.o: libg729.c
$(CC) $(CC_OPT) -c libg729.c $(INCLUDE)
mod_ipp_g729.o: mod_ipp_g729.c
$(CC) $(CC_OPT) -c mod_ipp_g729.c $(INCLUDE)
clean:
rm -rf *.o *.so
make clean
make all
This should compile without errors.
After compiling module fs-g729, you will get mod_ipp_g729.so
This is dynamically linked shared object file with the following linking dependencies
$ ldd mod_ipp_g729.so
linux-vdso.so.1 => (0x00007fff72da8000)
libm.so.6 => /lib/libm.so.6 (0x00007f9387a77000)
libfreeswitch.so.1 => not found
librt.so.1 => /lib/librt.so.1 (0x00007f938786e000)
libuuid.so.1 => /lib/libuuid.so.1 (0x00007f9387669000)
libcrypt.so.1 => /lib/libcrypt.so.1 (0x00007f9387430000)
libpthread.so.0 => /lib/libpthread.so.0 (0x00007f9387212000)
libc.so.6 => /lib/libc.so.6 (0x00007f9386e8f000)
/lib64/ld-linux-x86-64.so.2 (0x00007f9387f86000)
As can be seen the dependency of libfreeswitch.so.1 is not satisfied. This is because although libfreeswitch.so.1 is present in /usr/local/freeswitch/lib but this directory is not present in the link library path.
Put export LD_LIBRARY_PATH=”$LD_LIBRARY_PATH:/usr/local/freeswitch/lib” in .bashrc
After that, check again with ldd to confirm that all linking dependencies are satisfied. If anything is still missing, you may need to apt-get install the concerned development library. For instance, sudo apt-get install build-essential uuid-dev etc.
cp mod_ipp_g729.so /usr/local/freeswith/mod
chown -R freeswitch.freeswith /usr/local/freeswith
fs_cli>reload mod_ipp_g729.so
fs_cli>show codec
The result shold contain
codec,G.729 IPP Based,mod_ipp_g729
codec,G.729 for broken devices (G729A SDP),mod_ipp_g729
== Intel IPP Samples: G729 Encoder and Decoder ==
tar xvzf l_ipp-samples_p_7.0.6.046.tgz
cd ipp-samples/
cd speech-codecs/
export IPPROOT=”/opt/intel/ipp”
export LD_LIBRARY_PATH=”/opt/intel/ipp/lib/intel64/:/opt/intel/lib/intel64/”
ldconfig (or sudo ldconfig)
./build_intel64.sh
export PATH=”$PATH:$HOME/g729/ipp-samples/speech-codecs/_bin/intel64_gcc4/bin/”
To encode to G729A
usc_speech_codec -n -format IPP_G729A foo.wav foo.g729a
To decode from G729A
usc_speech_codec -n foo.g729a foo.wav
There is a 10x reduction in size form wav to g729a
ivr-welcome_to_freeswitch.wav 41840
ivr-welcome_to_freeswitch.g729a 4224
ISSUE: This does not seem to work, the resulting g729 coded files are not being played by the ipp_g729 module in FS.
== Results ==
You will see the following in the logs
v=0
o=FreeSWITCH 1326125840 1326125841 IN IP4 10.251.139.73
s=FreeSWITCH
c=IN IP4 10.251.139.73
t=0 0
m=audio 29294 RTP/AVP 18 96
a=rtpmap:18 G729/8000
a=fmtp:18 annexb=no
a=rtpmap:96 telephone-event/8000
a=fmtp:96 0-16
a=silenceSupp:off - - - -
a=ptime:20
a=sendrecv
sofia_glue.c:4727 Audio Codec Compare [G729:18:8000:20:8000]/[G7221:115:32000:20:48000]
sofia_glue.c:4727 Audio Codec Compare [G729:18:8000:20:8000]/[G7221:107:16000:20:32000]
sofia_glue.c:4727 Audio Codec Compare [G729:18:8000:20:8000]/[G729:18:8000:20:8000]
switch_core_state_machine.c:380 (sofia/external/+6285368033158@10.251.138.4) State NEW
sofia_glue.c:2848 Set Codec sofia/external/+6285368033158@10.251.138.4 G729/8000 20 ms 160 samples 8000 bits
Tested on Quad core AMD machine with 2 GB RAM for 750 concurrent calls.
== More Work ==
== References ==
https://code.google.com/p/fs-g729/
http://code.google.com/p/fsg729/
https://bitbucket.org/arkadi/asterisk-g72x
http://asterisk.hosting.lv/
http://www.readytechnology.co.uk/open/ipp-codecs-g729-g723.1/
