Revision 39ded680 libavcodec/qcelpdata.h
libavcodec/qcelpdata.h  

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#define QCELP_RATE_HALF_CODEBOOK_RATIO 0.5 
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/** 
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* sqrt(1.887) is the maximum of the pseudorandom 

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* white sequence used to generate the scaled codebook 

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* vector for framerate 1/4. 

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* 

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* TIA/EIA/IS733 2.4.8.1.2 

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*/ 

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#define QCELP_SQRT1887 1.373681186 

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/** 

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* table for impulse response of BPF used to filter 
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* the white excitation for framerate 1/4 synthesis 
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* 
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