[speex-dev] Where to pause stream (minimum decodable length)?

[Robert M.]

Thanks Jean-Marc. I'll take this as a fact. I guess I was confused by 
the equation in your code:

bit_rate = st->sampling_rate*SUBMODE(bits_per_frame)/st->frameSize

by the parameter SUBMODE(bits_per_frame).

Best regards

Robert M.

Jean-Marc Valin wrote:

>Yes it's the minimum, as you can't decode half a frame. In Speex frames
>are 20ms which should be low enough anyway.
>
>	Jean-Marc
>
>Le ven 16/05/2003 à 04:03, Robert M. a écrit :
>  
>
>>Here is my situation:
>>
>>I have large Speex encoded stream which I would like to playback on wave 
>>out device. I could decode whole stream to pcm and play it back as pcm 
>>audio, but this is not what I want. Instead I want to decode minimum 
>>decodable bits (bytes?) to pcm and play it ... then decode another 
>>minimum data chunk and play it, etc. This way I can achieve closest to 
>>real-time playback or I can pause and then restart playback. So, my 
>>question is: What is minimum length of Speex encoded data where decoder 
>>(speex_decode)  will still successfully decode input data? In Windows 
>>terminology this is called BlockAlign. The block alignment is the 
>>minimum atomic unit of data the playback and record software must 
>>process at a time .
>>
>>BTW, the sample provided is using frame_size*channels but I don't think 
>>this is the minimum.
>>
>>P.S. I need this for my ACM codec driver I'm working on.
>>
>>Robert M.
>>
>>
>>
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-- 
Lep pozdrav / Best regards

Robert Milharcic

ib-CADdy d.o.o. / www.ib-caddy.si
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