diff options
Diffstat (limited to 'src/audio/window.cc')
| -rw-r--r-- | src/audio/window.cc | 12 |
1 files changed, 8 insertions, 4 deletions
diff --git a/src/audio/window.cc b/src/audio/window.cc index d92f371..927a64e 100644 --- a/src/audio/window.cc +++ b/src/audio/window.cc @@ -1,9 +1,13 @@ +// This file is part of the 64k demo project. +// It implements the Hamming window function for spectral processing. +// Used to reduce spectral leakage during DCT operations. + #include "window.h" -#include "util/math.h" #include <math.h> -void hamming_window_512(float window[WINDOW_SIZE]) { +void hamming_window_512(float *window) { + const float PI = 3.14159265358979323846f; for (int i = 0; i < WINDOW_SIZE; ++i) { - window[i] = 0.54f - 0.46f * cosf(2.0f * PI * i / (WINDOW_SIZE - 1)); + window[i] = 0.54f - 0.46f * cosf(2.0f * PI * (float)i / (float)(WINDOW_SIZE - 1)); } -} +}
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