?? dcodcbi.c
字號:
/**************************************************************************
*
* ROUTINE
* dcodcbi
*
* FUNCTION
* Decodes all code book indicies for a frame
*
*
* SYNOPSIS
* subroutine dcodcbi(cbbits,bitsum1,bitsum2,nn,cbi)
*
* formal
*
* data I/O
* name type type function
* -------------------------------------------------------------------
* cbbits int i number of bits for quantization
* bitsum1 int i number of bits for odd subframes
* bitsum2 int i number of bits for even subframes
* bitpointer int i/o number of bits used
* nn int i number of subframes/frame
* stream short i bit stream
* cbi int o vector of code book indicies
*
***************************************************************************
*
* DESCRIPTION
*
*
***************************************************************************
*
* CALLED BY
*
* celp
*
* CALLS
*
* unpack
*
***************************************************************************
*
* REFERENCES
*
*
**************************************************************************/
dcodcbi(cbbits, bitsum1, bitsum2, bitpointer, nn, stream, cbi)
int cbbits, bitsum1, bitsum2, *bitpointer, nn, cbi[];
short stream[];
{
int i, pointer;
pointer = *bitpointer;
for (i = 0; i < nn; i++)
{
unpack(stream, cbbits, &cbi[i], &pointer);
cbi[i]++;
if (i == 0 || i == 2 || i == 4)
pointer += bitsum2 - cbbits;
else if (i == 1 || i == 3 || i == 5)
pointer += bitsum1 - cbbits;
else
printf("dcodcbi: ***Error in decoding code book index\n");
}
*bitpointer += cbbits;
}
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