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| author | Mans Rullgard <mans@mansr.com> | 2011-03-19 23:44:00 +0000 |
|---|---|---|
| committer | Mans Rullgard <mans@mansr.com> | 2011-03-20 13:25:19 +0000 |
| commit | 4538729afed44a0ee0a762d3ef69aa4bbb7f10b3 (patch) | |
| tree | 746f6f85406a0100bff5684c1055c8922761d020 /libavcodec/sinewin.h | |
| parent | a45fbda994df54600101e845e29f0af60e456e95 (diff) | |
| download | ffmpeg-streaming-4538729afed44a0ee0a762d3ef69aa4bbb7f10b3.zip ffmpeg-streaming-4538729afed44a0ee0a762d3ef69aa4bbb7f10b3.tar.gz | |
Move sine windows to a separate file
These windows do not really belong in fft/mdct files and were
easily confused with the similarly named tables used by rdft.
Signed-off-by: Mans Rullgard <mans@mansr.com>
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 |
