1 /* 2 * This file is part of FFmpeg. 3 * 4 * FFmpeg is free software; you can redistribute it and/or 5 * modify it under the terms of the GNU Lesser General Public 6 * License as published by the Free Software Foundation; either 7 * version 2.1 of the License, or (at your option) any later version. 8 * 9 * FFmpeg is distributed in the hope that it will be useful, 10 * but WITHOUT ANY WARRANTY; without even the implied warranty of 11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 12 * Lesser General Public License for more details. 13 * 14 * You should have received a copy of the GNU Lesser General Public 15 * License along with FFmpeg; if not, write to the Free Software 16 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 17 */ 18 19 #ifndef AVCODEC_KBDWIN_H 20 #define AVCODEC_KBDWIN_H 21 22 #include <stdint.h> 23 24 /** 25 * Maximum window size for ff_kbd_window_init. 26 */ 27 #define FF_KBD_WINDOW_MAX 1024 28 29 /** 30 * Generate a Kaiser-Bessel Derived Window. 31 * @param window pointer to half window 32 * @param alpha determines window shape 33 * @param n size of half window, max FF_KBD_WINDOW_MAX 34 */ 35 void ff_kbd_window_init(float *window, float alpha, int n); 36 void ff_kbd_window_init_fixed(int32_t *window, float alpha, int n); 37 38 #endif /* AVCODEC_KBDWIN_H */ 39