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 > >
