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Diffstat (limited to 'libavcodec/sinewin.h')
| -rw-r--r-- | libavcodec/sinewin.h | 59 |
1 files changed, 59 insertions, 0 deletions
diff --git a/libavcodec/sinewin.h b/libavcodec/sinewin.h new file mode 100644 index 0000000..2ed386a --- /dev/null +++ b/libavcodec/sinewin.h @@ -0,0 +1,59 @@ +/* + * Copyright (c) 2008 Robert Swain + * + * This file is part of Libav. + * + * Libav is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. + * + * Libav 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 + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with Libav; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#ifndef AVCODEC_SINEWIN_H +#define AVCODEC_SINEWIN_H + +#include "config.h" +#include "libavutil/mem.h" + +#if CONFIG_HARDCODED_TABLES +# define SINETABLE_CONST const +#else +# define SINETABLE_CONST +#endif + +#define SINETABLE(size) \ + SINETABLE_CONST DECLARE_ALIGNED(16, float, ff_sine_##size)[size] + +/** + * Generate a sine window. + * @param window pointer to half window + * @param n size of half window + */ +void ff_sine_window_init(float *window, int n); + +/** + * initialize the specified entry of ff_sine_windows + */ +void ff_init_ff_sine_windows(int index); + +extern SINETABLE( 32); +extern SINETABLE( 64); +extern SINETABLE( 128); +extern SINETABLE( 256); +extern SINETABLE( 512); +extern SINETABLE(1024); +extern SINETABLE(2048); +extern SINETABLE(4096); + +extern SINETABLE_CONST float * const ff_sine_windows[13]; + +#endif |
