[CELT-dev] Getting CELT to work under Windows

Riccardo Micci riccardo.micci at cambridgeconsultants.com
Thu Jun 24 03:31:28 PDT 2010

My name is Riccardo Micci i downloaded the CELT source code and I compiled 
it under Windows. This is meant to be a preliminary study for my company's 
When i run CELT it encodes and decodes the file back saying "Encoder 
matches decoder!!". When i try to play the output though the result is 
just noise and clicks.
The only changes I've applied are some #defines to avoid compiler error 
(for example my Visual C doesn't support "restrict"...) and automatic 
loading and saving input and output files.
Looking at the decoded file with Matlab, i can see the most of the time 
the result is saturated. Even worse when i use FIXED_POINT define. I also 
tried to avoid saturation changing the following line in arch.h:
#define SCALEOUT(a)     ((a)*(1/CELT_SIG_SCALE)) to #define SCALEOUT(a) 
The result audio doesn't saturate anymore but it's still completely 
My testvector is:
freq: 44100
channels: 1
I chose: frame_size = 256 and bytes_per_packet = 46.

Does anybody else have this problem? ?Can someone help me finding the 


Riccardo Micci
Senior DSP Engineer, Wireless Group 
Cambridge Consultants
Science Park, Milton Road 
Cambridge, CB4 0DW, England
Switchboard: +44 (0)1223 420024
Direct dial: +44 (0)1223 392402
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Fax: +44 (0)1223 423373
riccardo.micci at cambridgeconsultants.com

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