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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 2 | mjames | 1 | #include "ref.h" |
| 2 | |||
| 3 | void ref_rms_f32( |
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| 4 | float32_t * pSrc, |
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| 5 | uint32_t blockSize, |
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| 6 | float32_t * pResult) |
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| 7 | { |
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| 8 | uint32_t i; |
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| 9 | float32_t sumsq=0; |
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| 10 | |||
| 11 | for(i=0;i<blockSize;i++) |
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| 12 | { |
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| 13 | sumsq += pSrc[i] * pSrc[i]; |
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| 14 | } |
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| 15 | *pResult = sqrtf(sumsq / (float32_t)blockSize); |
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| 16 | } |
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| 17 | |||
| 18 | void ref_rms_q31( |
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| 19 | q31_t * pSrc, |
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| 20 | uint32_t blockSize, |
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| 21 | q31_t * pResult) |
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| 22 | { |
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| 23 | uint32_t i; |
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| 24 | q63_t sumsq=0; |
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| 25 | q63_t tmp1; |
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| 26 | q31_t tmp2; |
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| 27 | |||
| 28 | float help_float; |
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| 29 | |||
| 30 | for(i=0;i<blockSize;i++) |
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| 31 | { |
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| 32 | sumsq += (q63_t)pSrc[i] * pSrc[i]; |
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| 33 | } |
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| 34 | tmp1 = (sumsq / (q63_t)blockSize) >> 31; |
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| 35 | tmp2 = ref_sat_q31(tmp1); |
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| 36 | |||
| 37 | /* GCC M0 problem: __aeabi_f2iz(QNAN) returns not 0 */ |
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| 38 | help_float = (sqrtf((float)tmp2 / 2147483648.0f) * 2147483648.0f); |
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| 39 | /* Checking for a NAN value in help_float */ |
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| 40 | if (((*((int *)(&help_float))) & 0x7FC00000) == 0x7FC00000) { |
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| 41 | help_float = 0; |
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| 42 | } |
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| 43 | *pResult = (q31_t)(help_float); |
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| 44 | |||
| 45 | // *pResult = (q31_t)(sqrtf((float)tmp2 / 2147483648.0f) * 2147483648.0f); |
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| 46 | } |
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| 47 | |||
| 48 | void ref_rms_q15( |
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| 49 | q15_t * pSrc, |
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| 50 | uint32_t blockSize, |
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| 51 | q15_t * pResult) |
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| 52 | { |
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| 53 | uint32_t i; |
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| 54 | q63_t sumsq=0; |
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| 55 | q31_t tmp1; |
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| 56 | q15_t tmp2; |
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| 57 | |||
| 58 | for(i=0;i<blockSize;i++) |
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| 59 | { |
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| 60 | sumsq += (q63_t)pSrc[i] * pSrc[i]; |
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| 61 | } |
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| 62 | tmp1 = (sumsq / (q63_t)blockSize) >> 15; |
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| 63 | tmp2 = ref_sat_q15(tmp1); |
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| 64 | *pResult = (q15_t)(sqrtf((float)tmp2 / 32768.0f) * 32768.0f); |
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| 65 | } |