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Diffstat (limited to 'src/audio/fft.h')
| -rw-r--r-- | src/audio/fft.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/src/audio/fft.h b/src/audio/fft.h index df37ad5..6a54742 100644 --- a/src/audio/fft.h +++ b/src/audio/fft.h @@ -8,6 +8,9 @@ #include <cstddef> +// Bit-reversal permutation (in-place). Exposed for testing. +void bit_reverse_permute(float* real, float* imag, size_t N); + // Forward FFT: Time domain → Frequency domain // Input: real[] (length N), imag[] (length N, can be zeros) // Output: real[] and imag[] contain complex frequency bins |