yading@10: /*
yading@10:  * Header file for hardcoded sine windows
yading@10:  *
yading@10:  * Copyright (c) 2009 Reimar Döffinger <Reimar.Doeffinger@gmx.de>
yading@10:  *
yading@10:  * This file is part of FFmpeg.
yading@10:  *
yading@10:  * FFmpeg is free software; you can redistribute it and/or
yading@10:  * modify it under the terms of the GNU Lesser General Public
yading@10:  * License as published by the Free Software Foundation; either
yading@10:  * version 2.1 of the License, or (at your option) any later version.
yading@10:  *
yading@10:  * FFmpeg is distributed in the hope that it will be useful,
yading@10:  * but WITHOUT ANY WARRANTY; without even the implied warranty of
yading@10:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
yading@10:  * Lesser General Public License for more details.
yading@10:  *
yading@10:  * You should have received a copy of the GNU Lesser General Public
yading@10:  * License along with FFmpeg; if not, write to the Free Software
yading@10:  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
yading@10:  */
yading@10: 
yading@10: #ifndef AVCODEC_SINEWIN_TABLEGEN_H
yading@10: #define AVCODEC_SINEWIN_TABLEGEN_H
yading@10: 
yading@10: #include <assert.h>
yading@10: // do not use libavutil/libm.h since this is compiled both
yading@10: // for the host and the target and config.h is only valid for the target
yading@10: #include <math.h>
yading@10: #include "libavutil/attributes.h"
yading@10: #include "libavutil/common.h"
yading@10: 
yading@10: #if !CONFIG_HARDCODED_TABLES
yading@10: SINETABLE(  32);
yading@10: SINETABLE(  64);
yading@10: SINETABLE( 128);
yading@10: SINETABLE( 256);
yading@10: SINETABLE( 512);
yading@10: SINETABLE(1024);
yading@10: SINETABLE(2048);
yading@10: SINETABLE(4096);
yading@10: SINETABLE(8192);
yading@10: #else
yading@10: #include "libavcodec/sinewin_tables.h"
yading@10: #endif
yading@10: 
yading@10: SINETABLE_CONST float * const ff_sine_windows[] = {
yading@10:     NULL, NULL, NULL, NULL, NULL, // unused
yading@10:     ff_sine_32 , ff_sine_64 ,
yading@10:     ff_sine_128, ff_sine_256, ff_sine_512, ff_sine_1024, ff_sine_2048, ff_sine_4096, ff_sine_8192
yading@10: };
yading@10: 
yading@10: // Generate a sine window.
yading@10: av_cold void ff_sine_window_init(float *window, int n) {
yading@10:     int i;
yading@10:     for(i = 0; i < n; i++)
yading@10:         window[i] = sinf((i + 0.5) * (M_PI / (2.0 * n)));
yading@10: }
yading@10: 
yading@10: av_cold void ff_init_ff_sine_windows(int index) {
yading@10:     assert(index >= 0 && index < FF_ARRAY_ELEMS(ff_sine_windows));
yading@10: #if !CONFIG_HARDCODED_TABLES
yading@10:     ff_sine_window_init(ff_sine_windows[index], 1 << index);
yading@10: #endif
yading@10: }
yading@10: 
yading@10: #endif /* AVCODEC_SINEWIN_TABLEGEN_H */