Hello, I?m trying to add the ogg vorbis codec to the pjlib and what I?ve did so far is copied the L16 codec(I used this because it does no encoding so it?s more simple to modify) , added ogg vorbis and fishsound(simplifies the vorbis api) libraries to the pjproject. The most important vorbis-related code resides in the encode() and parse() functions. And here is the first problem I ran into, apparently there is some sort of synchronization between the parse() and the decode() calls. During encoding, vorbis produces packets which have different sizes and contain different number of frames, so basically what I did was decode incoming packets in the parse() call, return as many as possible through the frames[] argument and store in a buffer for a subequent call of parse() the rest of the frames. After that decode() just plays back the frames returned by parse(). And the problem is that I can hear some small pauses in sound. >From my understanding, parse() is only called when a packet is received from the remote party and decode() in turn si only called when parse is called so sound is played back only when I receive data. I tried to avoid what seemed to be this problem by placing all the frames produced by the ogg vorbis decoder in a buffer and creating a player using pjmedia_snd_port_create_player() and this player reads the frames from that buffer. This works fine apparently, there are no pauses in sound but after a hour or so of functioning a crash occurs. In this case the callback for the pjmedia player and the decode() callback run at the same time, difference is that the output argument from decode() has output->size=0 and output->type = PJMEDIA_FRAME_TYPE_NONE while the getframe callback is responsible for feeding audio data. The crash appears in the pjmedia_port_get_frame->get_frame->pjmedia_jbuf_get_frame2 or pjmedia_port_get_frame->get_frame->pj_mutex_unlock. My question is if there is a sync between parse() and decode() how can I break it. And if the architecture doesn?t allow this, is there any restriction on using decode() and pjmedia snd player together, because this may be a cause for the crashes I?m seeing? Thanks, Mihai Richard -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.pjsip.org/pipermail/pjsip_lists.pjsip.org/attachments/20111202/e267baab/attachment.html>
