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#include "ref.h"
void ref_rms_f32(
float32_t * pSrc,
uint32_t blockSize,
float32_t * pResult)
{
uint32_t i;
float32_t sumsq=0;
for(i=0;i<blockSize;i++)
{
sumsq += pSrc[i] * pSrc[i];
}
*pResult = sqrtf(sumsq / (float32_t)blockSize);
}
void ref_rms_q31(
q31_t * pSrc,
uint32_t blockSize,
q31_t * pResult)
{
uint32_t i;
q63_t sumsq=0;
q63_t tmp1;
q31_t tmp2;
float help_float;
for(i=0;i<blockSize;i++)
{
sumsq += (q63_t)pSrc[i] * pSrc[i];
}
tmp1 = (sumsq / (q63_t)blockSize) >> 31;
tmp2 = ref_sat_q31(tmp1);
/* GCC M0 problem: __aeabi_f2iz(QNAN) returns not 0 */
help_float = (sqrtf((float)tmp2 / 2147483648.0f) * 2147483648.0f);
/* Checking for a NAN value in help_float */
if (((*((int *)(&help_float))) & 0x7FC00000) == 0x7FC00000) {
help_float = 0;
}
*pResult = (q31_t)(help_float);
// *pResult = (q31_t)(sqrtf((float)tmp2 / 2147483648.0f) * 2147483648.0f);
}
void ref_rms_q15(
q15_t * pSrc,
uint32_t blockSize,
q15_t * pResult)
{
uint32_t i;
q63_t sumsq=0;
q31_t tmp1;
q15_t tmp2;
for(i=0;i<blockSize;i++)
{
sumsq += (q63_t)pSrc[i] * pSrc[i];
}
tmp1 = (sumsq / (q63_t)blockSize) >> 15;
tmp2 = ref_sat_q15(tmp1);
*pResult = (q15_t)(sqrtf((float)tmp2 / 32768.0f) * 32768.0f);
}
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