diff options
| -rw-r--r-- | libavcodec/fft.h | 7 | ||||
| -rw-r--r-- | libavcodec/mdct.c | 4 |
2 files changed, 9 insertions, 2 deletions
diff --git a/libavcodec/fft.h b/libavcodec/fft.h index 1f5b2e86da..10ca1b140e 100644 --- a/libavcodec/fft.h +++ b/libavcodec/fft.h @@ -151,10 +151,15 @@ static inline void ff_mdct_calc(FFTContext *s, FFTSample *output, } /** + * Maximum window size for ff_kbd_window_init. + */ +#define FF_KBD_WINDOW_MAX 1024 + +/** * Generate a Kaiser-Bessel Derived Window. * @param window pointer to half window * @param alpha determines window shape - * @param n size of half window + * @param n size of half window, max FF_KBD_WINDOW_MAX */ void ff_kbd_window_init(float *window, float alpha, int n); diff --git a/libavcodec/mdct.c b/libavcodec/mdct.c index 69e1bbff22..c511188d22 100644 --- a/libavcodec/mdct.c +++ b/libavcodec/mdct.c @@ -36,9 +36,11 @@ av_cold void ff_kbd_window_init(float *window, float alpha, int n) { int i, j; double sum = 0.0, bessel, tmp; - double local_window[n]; + double local_window[FF_KBD_WINDOW_MAX]; double alpha2 = (alpha * M_PI / n) * (alpha * M_PI / n); + assert(n <= FF_KBD_WINDOW_MAX); + for (i = 0; i < n; i++) { tmp = i * (n - i) * alpha2; bessel = 1.0; |