55 lines
2.1 KiB
C
55 lines
2.1 KiB
C
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/* (c) Copyright 2008/2009 Xiph.Org Foundation */
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/*
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions
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are met:
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- Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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- Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in the
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documentation and/or other materials provided with the distribution.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR
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CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef _dsp_fft_h_
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#define _dsp_fft_h_
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#include "config.h"
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#include "arch.h"
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#include "os_support.h"
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#include "mathops.h"
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#include "stack_alloc.h"
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typedef struct {
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int nfft;
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int shift;
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celt_int32 *twiddle;
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celt_int32 *itwiddle;
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} c64_fft_t;
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extern c64_fft_t *c64_fft16_alloc(int length, int x, int y);
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extern void c64_fft16_free(c64_fft_t *state);
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extern void c64_fft16_inplace(c64_fft_t *state, celt_int16 *X);
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extern void c64_ifft16(c64_fft_t *state, const celt_int16 *X, celt_int16 *Y);
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extern c64_fft_t *c64_fft32_alloc(int length, int x, int y);
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extern void c64_fft32_free(c64_fft_t *state);
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extern void c64_fft32(c64_fft_t *state, const celt_int32 *X, celt_int32 *Y);
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extern void c64_ifft32(c64_fft_t *state, const celt_int32 *X, celt_int32 *Y);
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#endif
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