diff options
Diffstat (limited to 'src/post/visualizations/fft.h')
| -rw-r--r-- | src/post/visualizations/fft.h | 50 |
1 files changed, 50 insertions, 0 deletions
diff --git a/src/post/visualizations/fft.h b/src/post/visualizations/fft.h new file mode 100644 index 000000000..707879641 --- /dev/null +++ b/src/post/visualizations/fft.h @@ -0,0 +1,50 @@ +/* + * Copyright (C) 2000-2002 the xine project + * + * This file is part of xine, a free video player. + * + * xine is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * xine is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA + * + */ +#ifndef FFT_H +#define FFT_H + +struct complex_s +{ + double re; + double im; +}; +typedef struct complex_s complex_t; + + +struct fft_s { + int bits; + double *SineTable; + double *CosineTable; + double *WinTable; +}; +typedef struct fft_s fft_t; + +fft_t *fft_new (int bits); +void fft_dispose(fft_t *fft); + +void fft_compute (fft_t *fft, complex_t wave[]); +void fft_window (fft_t *fft, complex_t wave[]); + +double fft_amp (int n, complex_t wave[], int bits); +double fft_phase (int n, complex_t wave[], int bits); +void fft_scale (complex_t wave[], int bits); + +#endif /* FFT_H */ |