Hi Jessica, Sorry for late response. I couldn't say whether such way is better or wrong, I am not really sure on what you want to achieve. Yes, the silence/zero audio data is there to pad the last frame when you are using PJMEDIA_MEM_NO_LOOP, this should be less than one frame time (10-30ms). However if you don't want this, there may be some tricks to avoid this silence, e.g: make the audio size to be multiplication of the frame size, or remove PJMEDIA_MEM_NO_LOOP options and put your own (white) noise for 1-2 frames in the beginning of audio data to avoid 'real' silence. Regards, nanang 2008/6/26 vopjessie <jessievop at hotmail.com>: > Thanks Nanang, you are right about PJMEDIA_MEM_NO_LOOP. Your message helps > me understand why i heard some bytes replayed. Thanks! However, I am still > not able to figure out how to play an audio data stream > (stored in buffers) to a port associated with a call. If i create a mem > player for each audio buffer, i would hear the silence between each audio > buffer. It seems to me i am trying to do this in a wrong way. Is there a > better way to do this? > > thanks a lot! > > -Jessica > >> Date: Wed, 25 Jun 2008 19:38:02 +0700 >> From: nanang@xxxxxxxxx >> To: pjsip at lists.pjsip.org >> Subject: Re: Play buffer to a port associated with a call >> >> Hi Jess, >> >> Not sure what you want to achieve, but normally you should create mem >> player port for each audio. Last few bytes replayed sounds like length >> inconsistency among audio's put in the buffer. Other possibility is >> PJMEDIA_MEM_NO_LOOP option is not set when creating memplayer. >> >> Regards, >> nanang >> >> >> 2008/6/25 vopjessie <jessievop at hotmail.com>: >> > Hi Nanang, thanks for the message again. It sounds like the last a few >> > bytes >> > are replayed. You are right. I was actually not sure if the way i am >> > doing >> > is the right way to play data in a buffer to a port associated with a >> > call. >> > Is there a better way to do it? >> > >> > thanks a lot >> > >> > Jessica >> > >> >> Date: Wed,25 Jun 2008 18:15:54 +0700 >> >> From: nanang@xxxxxxxxx >> >> To: pjsip at lists.pjsip.org >> >> Subject: Re: Play buffer to a port associated with a call >> >> >> >> Hi Jess, >> >> >> >> Could you describe more detail on "I can hear the audio, but it >> >> doesn't sound correct", did it play correct audio but then continued >> >> with previous audio? or audio was played slower/faster? IMHO, it is >> >> rather unusual idea to replace the memplayer's audio buffer in EOF >> >> callback since you should make sure that the clock rate, channel >> >> number, and PCM length must be exactly same. >> >> >> >> Regards, >> >> nanang >> >> >> >> >> >> 2008/6/25 vopjessie <jessievop at hotmail.com>: >> >> > I need to play audio data in a buffer to a sip inbound or outbound. >> >> > The >> >> > following steps are what I am doing: >> >> > >> >> > - call pjmedia_conf_create() to create a conference bridge >> >> > - call pjmedia_mem_player_create() to create a port for the audio >> >> > buffer >> >> > - call pjmedia_mem_player_set_eof_cb() to register a call back >> >> > - call pjmedia_conf_add_port() to add the port associated with the >> >> > sip >> >> > call >> >> > (inbound or outbound) to the conference bridge >> >> > - call pjmedia_conf_add_port() to add the port associated with the >> >> > audio >> >> > buffer the same conference bridge >> >> > - call pjmedia_conf_connect_port() to connect the port associated >> >> > with >> >> > the >> >> > audio buffer to the port associated with the sip call (inbound or >> >> > outbound) >> >> > - call pjmedia_null_port_create() to create a null port >> >> > - call pjmedia_master_port_create() to create a master port with the >> >> > null >> >> > port as the upstream and the master port obtained from the conference >> >> > bridge >> >> > as the downstream >> >> > - call pjmedia_master_port_start() to start the master port created >> >> > in >> >> > the >> >> > last step >> >> > >> >> > I can hear the audio, but it doesn't sound correct. Since i fill the >> >> > audio >> >> > data to the buffer every time the call back function is called, i >> >> > write >> >> > the >> >> > data filled in the audio buffer to a file in the call back function, >> >> > the >> >> > audio data in the file are correct. Does anyone know if i have done >> >> > anything >> >> > wrong. >> >> > >> >> > thanks in advance >> >> > >> >> > -Jessica >> >> > >> >> > ________________________________ >> >> > "?????????" ????? >> >> > _______________________________________________ >> >> > 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 >> > >> > >> > ________________________________ >> > ???Hotmail???????? Windows Live Mail? ????? >> > _______________________________________________ >> > 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 > > -------------- next part -------------- An HTML attachment was scrubbed... URL: http://lists.pjsip.org/pipermail/pjsip_lists.pjsip.org/attachments/20080630/089195ca/attachment-0001.html
