Re: Re: Re: [Linphone-developers] alaw codec in mediastreamer2

[Yao-Chung Chang]

Hello, I've traced the source code of ms_ticker_run(), and have a question.

Considering the following graph



A   D - - E - - F
  \         /
    \     /
     C  - - G
  /
B

In the graph,  A, B, and D are the sources. In the first round,

D is being processed, and  E is put to unschedulable list.

Then,  A is being processed,  and C is put  to unscheduable list as well.

Finally, B is being processed, then C, E, F, G are being processed though

the graph traversal. Since C, E are being processed when B is done, why the

unschedulable list containg C and E still needs to be processed? Or there is

another special case that I didn't consider?

                                Regards,
                                        ycchang

2006/9/24, Yao-Chung Chang <address@hidden>:
> Would you please tell me how msticker schedule all filters?
>
>
> In run_graphs(), there's a snippet of code handling unschedulable
>
> filter, and I still can't understand the comment there. Besides, I've
> sucessfully
>
> hook a filter though the DSP, but got many "we are late of xxx miliseconds"
>
>  messages. Is that mean the latency of my filter module is over 10ms?
>
>
>                        Regards,
>                             ycchang
>
>
> 2006/9/22, Simon Morlat <address@hidden>:
> >
> > >
> > > My question is
> > > 1.how the buffer size, and frame_per_packet size is determined?
> > I think it is determined from the ptime parameter.
> >
> > > and why the size_of_pcm is 160 * frame_per_packet?
> > "frame" stands for a 10ms buffer of alaw.
> > > 2. what the purpose of bufferizer?
> > The bufferizer object is a kind of fifo where you put mblk_t buffers of any
> > size (256,512,33), and read buffer of fized size (for example 160).
> >
> > Simon
> >
> >
> > >
> > >                               Regards,
> > >                                   ycchang
> > >
> > >
> > > _______________________________________________
> > > Linphone-developers mailing list
> > > address@hidden
> > > http://lists.nongnu.org/mailman/listinfo/linphone-developers
> >