mirror of
https://github.com/godotengine/godot.git
synced 2025-10-31 21:51:22 +00:00
58 lines
2.2 KiB
C
58 lines
2.2 KiB
C
/* Copyright (C) 2005 Jean-Marc Valin
|
|
File: fftwrap.h
|
|
|
|
Wrapper for various FFTs
|
|
|
|
Redistribution and use in source and binary forms, with or without
|
|
modification, are permitted provided that the following conditions
|
|
are met:
|
|
|
|
- Redistributions of source code must retain the above copyright
|
|
notice, this list of conditions and the following disclaimer.
|
|
|
|
- Redistributions in binary form must reproduce the above copyright
|
|
notice, this list of conditions and the following disclaimer in the
|
|
documentation and/or other materials provided with the distribution.
|
|
|
|
- Neither the name of the Xiph.org Foundation nor the names of its
|
|
contributors may be used to endorse or promote products derived from
|
|
this software without specific prior written permission.
|
|
|
|
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
|
``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
|
LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
|
|
A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR
|
|
CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
|
|
EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
|
|
PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
|
|
PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
|
|
LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
|
|
NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
|
|
SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
|
|
*/
|
|
|
|
#ifndef FFTWRAP_H
|
|
#define FFTWRAP_H
|
|
|
|
#include "arch.h"
|
|
|
|
/** Compute tables for an FFT */
|
|
void *spx_fft_init(int size);
|
|
|
|
/** Destroy tables for an FFT */
|
|
void spx_fft_destroy(void *table);
|
|
|
|
/** Forward (real to half-complex) transform */
|
|
void spx_fft(void *table, spx_word16_t *in, spx_word16_t *out);
|
|
|
|
/** Backward (half-complex to real) transform */
|
|
void spx_ifft(void *table, spx_word16_t *in, spx_word16_t *out);
|
|
|
|
/** Forward (real to half-complex) transform of float data */
|
|
void spx_fft_float(void *table, float *in, float *out);
|
|
|
|
/** Backward (half-complex to real) transform of float data */
|
|
void spx_ifft_float(void *table, float *in, float *out);
|
|
|
|
#endif
|