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


From: Yao-Chung Chang
Subject: Re: Re: [Linphone-developers] alaw codec in mediastreamer2
Date: Sun, 24 Sep 2006 21:21:19 +0800

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
>
>
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