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49 lines
1.3 KiB
49 lines
1.3 KiB
extern crate assert;
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extern crate fft;
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mod fixtures;
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#[test]
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fn forward() {
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let mut data = fixtures::TIME_DATA.to_vec();
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fft::forward(as_c64_mut(&mut data));
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assert::close(&data, &fixtures::FREQUENCY_DATA_FROM_COMPLEX[..], 1e-14);
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}
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#[test]
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fn forward_real() {
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let mut data = fixtures::TIME_DATA.to_vec();
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{
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let mut data = to_c64(&data);
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fft::forward(&mut data);
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assert::close(as_f64(&data), &fixtures::FREQUENCY_DATA_FROM_REAL[..], 1e-13);
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}
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{
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fft::forward_real(&mut data);
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let data = fft::unpack_real(&data);
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assert::close(as_f64(&data), &fixtures::FREQUENCY_DATA_FROM_REAL[..], 1e-13);
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}
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}
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#[test]
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fn inverse() {
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let mut data = fixtures::FREQUENCY_DATA_FROM_COMPLEX.to_vec();
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fft::inverse(as_c64_mut(&mut data), true);
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assert::close(&data, &fixtures::TIME_DATA[..], 1e-14);
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}
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fn as_f64<'l>(slice: &'l [fft::c64]) -> &'l [f64] {
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unsafe {
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std::slice::from_raw_parts(slice.as_ptr() as *const _, 2 * slice.len())
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}
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}
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fn as_c64_mut<'l>(slice: &'l mut [f64]) -> &'l mut [fft::c64] {
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unsafe {
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std::slice::from_raw_parts_mut(slice.as_mut_ptr() as *mut _, slice.len() / 2)
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}
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}
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fn to_c64(slice: &[f64]) -> Vec<fft::c64> {
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slice.iter().map(|&re| fft::c64(re, 0.0)).collect()
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}
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