Thank you, nanaing. The problem can be solved by adding --stereo param. For the people who want to use pjsip on Davinci, you should add following param in your config file for better audio quality. --stereo --ec-tail=0 --add-codec pcmu --dis-codec speex --dis-codec ilbc --dis-codec GSM --dis-codec G722 --clock-rate=8000 --snd-clock-rate=8000 Here is the remaining results of the tests you mentioned. - In Davinci, 'short' is 16 bits - sndtest output the duration is 11s - playing a 8kHz file on Davinci is centain faster than x86 Best Regards, Fan-Cheng Wu 2008/10/10 Nanang Izzuddin <nanang at pjsip.org>: > Hi, > > Just an opinion, those tests show that PJSUA on Davinci records more > samples than it is supposed to, and also plays more samples than it is > supposed to (test #1 - #4 involved only Davinci where record & play > are sync'd, thus they are fine, while test #5 & #6 involved other > machine). Or it is just an impression caused by inaccurate pjlib data > types definitions for Davinci (e.g: 'pj_int16_t' is defined as > 'short', while 'short' in Davinci may be 32 bit length instead of 16 > bit). > > So, I think more tests are needed before conclude something here, e.g: > - sndtest (in pjsip-apps/src/samples directory), check if the duration > printed by sndtest is about twice longer (e.g by default sndtest > duration is 10s, the output duration should be around 10s too). > - play a correct 8KHz wav file on Davinci's PJSUA, check if it is played faster. > - run pjsua in stereo mode 8KHz, do a recording, it will result a > stereo 8KHz file, play that recorded file as mono 8KHz. > > Regards, > nanang > > > 2008/10/10 Fan-Cheng Wu ?????\ <fcwu.cs95g at nctu.edu.tw>: >> Hi, >> >> I upload two wav files to explain my problem. >> The file recorded by this >> way(http://trac.pjsip.org/repos/wiki/audio-how-to-record) could be >> found here http://moon.cse.yzu.edu.tw/~s912356/output_people_8000.wav. >> It sound slow and low pitch. The correct one should sound like this >> http://moon.cse.yzu.edu.tw/~s912356/output_people_16000.wav. >> >> I made following testings to clarify my problem. >> 1. "cat /dev/dsp > file", and then "cat file > /dev/dsp" => Correct >> 2. Record and Play audio by portaudio(testing src is >> third_party/portaudio/test/patest_record.c) => Correct >> 3. PJSUA Looping-back >> testing(http://trac.pjsip.org/repos/wiki/audio-check-loopback) => >> Correct >> 4. Record any audio either from file or mic by PJSUA, and Play them on >> Davinci by PJSUA and sample/playfile => Correct >> 5. Record any audio either from file or mic by PJSUA, and Play them on >> my PC by mplayer => Slow and low pitch. It would be correct if playing >> it with double rate, saying 16000Hz. >> 6. VoIP between PJSUA on Davinci and PJSUA on Linux. => Slow and low pitch. >> >> So I infer the problem is triggered by pjsip. How can I dig out them in pjsip? >> >> >> >> FCWu >> >> >> >> 2008/10/10 Nanang Izzuddin <nanang at pjsip.org>: >>> Hi, >>> >>> Not sure what's going on, but I agree it seems to be a sound device >>> issue, e.g: it may be actually opened in either stereo or 16KHz. I >>> found this old post that may be related to this issue: >>> http://mlblog.osdir.com/linux.davinci/2006-10/msg00283.shtml, as it >>> says "Davinci OSS driver don't work correctly in mono mode and driver >>> still return two samples per tick". Perhaps you can check this by >>> running pjsua in stereo mode (with param '--stereo') and see the mic >>> recording result. Then you can also check pjsua with clock rate 16KHz. >>> >>> In case it *is* sound device issue, you can also search/post a >>> question in the PortAudio forum (PJSIP uses PortAudio on linux >>> platform). Moreover, you can implement your own sound device wrapper, >>> please see http://trac.pjsip.org/repos/wiki/External_Sound_Device for >>> the build config. >>> >>> Regards, >>> nanang >>> >>> >>> On Thu, Oct 9, 2008 at 1:25 PM, Fan-Cheng Wu ?????\ <fcwu.cs95g at nctu.edu.tw> wrote: >>>> Hi All, >>>> >>>> I experienced pjsua on TI Davinci, which configured ./aconfigure >>>> --host=armv5tl-montavista-linuxeabi CFLAGS='-O2 -msoft-float -DNDEBUG >>>> -mcpu=arm926ej-s' --disable-floating-point and defined "#define >>>> PJSUA_DEFAULT_CLOCK_RATE (8000)" on config_site.h. >>>> When I run pjsua to record sound of 10 second from mic to a file, the >>>> file would be extended to 20 second long and sound lower pitch than >>>> original one. (Play it with double rate, it sound fine.) I suppose >>>> it's because recording device has wrong recording rate. Anybody knows >>>> how can I adjust it? >>>> >>>> p.s. If I recorded a default ring sound from port 02 (Port #02[ >>>> 8KHz/20ms/1] ring transmitting to: ), it's also correct. So the >>>> problem come from recording device (?). >>>> >>>> The following are the steps I recorded sound from mic. >>>> ./pjsua-armv5tl-montavista-linux-gnueabi --rec-file=output.wav >>>> --clock-rate=8000 --snd-clock-rate=8000 >>>> ... >>>>>>> cc 0 1 >>>> 07:49:01.566 pjsua_media.c pjsua_set_snd_dev(): attempting to open >>>> devices @8000 Hz >>>> 07:49:01.758 ec0x150df8 AEC created, clock_rate=8000, channel=1, >>>> samples per frame=160, tail length=200 ms, latency=96 ms >>>> 07:49:01.759 conference.c Port 3 (ring) transmitting to port 1 (output.wav) >>>> >>>> >>>> >>>> Best Regards, >>>> FCWu >>>> >>>> _______________________________________________ >>>> Visit our blog: http://blog.pjsip.org >>>> >>>> pjsip mailing list >>>> pjsip at lists.pjsip.org >>>> http://lists.pjsip.org/mailman/listinfo/pjsip_lists.pjsip.org >>>> >>> >>> _______________________________________________ >>> Visit our blog: http://blog.pjsip.org >>> >>> pjsip mailing list >>> pjsip at lists.pjsip.org >>> http://lists.pjsip.org/mailman/listinfo/pjsip_lists.pjsip.org >>> >>> >> >> _______________________________________________ >> Visit our blog: http://blog.pjsip.org >> >> pjsip mailing list >> pjsip at lists.pjsip.org >> http://lists.pjsip.org/mailman/listinfo/pjsip_lists.pjsip.org >> >> > > _______________________________________________ > Visit our blog: http://blog.pjsip.org > > pjsip mailing list > pjsip at lists.pjsip.org > http://lists.pjsip.org/mailman/listinfo/pjsip_lists.pjsip.org > >
