Speex dev - Aug 2004 - framesize v/s audio buffer size

Hello all..

Im new to speex, and im trying to use it in my application to transmit 
speech over multicast.

I've done some test, but i have some questions. First, I'm reading audio
with a buffer of 512 bytes, but the speex frames are 160 (using 
SPEEX_GET_FRAME_SIZE), so i have to manually divide the 512 bytes (256 
16bit samples) in blocks of 160 float samples. Using 1 frame, i dispatch 
the first 160 samples, but there are 96 (256-160) samples remaining. What 
can i do with them ? I need to send them as soon as posible, so i guess i 
cant just wait until the next audio buffer comes to push the data inside 
the codec. I dont even know if the sound card will produce more audio 
because before getting here, the audio have to pass some noise level. If 
the audio is not louder enought i will not get any data.

Any ideas ?
Thanks in advance.

<p>
-- 
The names of their development products, visual this, visual that, almost 
makes one think that you can create software just by looking at your computer

<p><p>--- >8 ----
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Hi,
The most obvious solution would be to use an audio buffer of 160 x N
instead of 512 bytes. About your soundcard you should disable that
threshold feature (of which I've never heard).

What kind of a soundcard do you have?

//Best Regards Jonas Tärnström

<p>> -----Ursprungligt meddelande-----
> Från: owner-speex-dev@xiph.org [mailto:owner-speex-dev@xiph.org] För
Eric
> Ross
> Skickat: den 13 september 2003 02:40
> Till: speex-dev@xiph.org
> Ämne: [speex-dev] framesize v/s audio buffer size
> 
> Hello all..
> 
> Im new to speex, and im trying to use it in my application to transmit
> speech over multicast.
> 
> I've done some test, but i have some questions. First, I'm reading
audio
> with a buffer of 512 bytes, but the speex frames are 160 (using
> SPEEX_GET_FRAME_SIZE), so i have to manually divide the 512 bytes (256
> 16bit samples) in blocks of 160 float samples. Using 1 frame, i
dispatch
> the first 160 samples, but there are 96 (256-160) samples remaining.
What
> can i do with them ? I need to send them as soon as posible, so i
guess i
> cant just wait until the next audio buffer comes to push the data
inside
> the codec. I dont even know if the sound card will produce more audio
> because before getting here, the audio have to pass some noise level.
If
> the audio is not louder enought i will not get any data.
> 
> Any ideas ?
> Thanks in advance.
> 
> 
> --
> The names of their development products, visual this, visual that,
almost
> makes one think that you can create software just by looking at your
> computer
> 
> 
> 
> --- >8 ----
> List archives:  http://www.xiph.org/archives/
> Ogg project homepage: http://www.xiph.org/ogg/
> To unsubscribe from this list, send a message to 'speex-dev-
> request@xiph.org'
> containing only the word 'unsubscribe' in the body.  No subject is
needed.
> Unsubscribe messages sent to the list will be ignored/filtered.
<p><p>--- >8 ----
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