| 110 | } |
| 111 | |
| 112 | unsigned zeroCrossFirst(const float * src, unsigned len){ |
| 113 | uint32_t * srcI = (uint32_t *)src; |
| 114 | uint32_t prev = *srcI++; |
| 115 | |
| 116 | for(unsigned i=0; i<len-1; ++i){ |
| 117 | uint32_t now = *srcI++; |
| 118 | if((now ^ prev)>>31){ |
| 119 | return i-1; |
| 120 | } |
| 121 | prev = now; |
| 122 | } |
| 123 | return 0; |
| 124 | } |
| 125 | |
| 126 | unsigned zeroCrossN(const float * src, unsigned len, float prevVal){ |
| 127 |
nothing calls this directly
no outgoing calls
no test coverage detected