28 lines
882 B
C
28 lines
882 B
C
/* SoX Resampler Library Copyright (c) 2007-12 robs@users.sourceforge.net
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* Licence for this file: LGPL v2.1 See LICENCE for details. */
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#include <math.h>
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#include <libavcodec/avfft.h>
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#include "filter.h"
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static void * forward_setup(int len) {return av_rdft_init((int)(log(len)/log(2)+.5),DFT_R2C);}
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static void * backward_setup(int len) {return av_rdft_init((int)(log(len)/log(2)+.5),IDFT_C2R);}
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static void rdft(int length, void * setup, float * h) {av_rdft_calc(setup, h); (void)length;}
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static int multiplier(void) {return 2;}
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static void nothing(void) {}
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typedef void (* fn_t)(void);
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fn_t _soxr_rdft32_cb[] = {
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(fn_t)forward_setup,
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(fn_t)backward_setup,
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(fn_t)av_rdft_end,
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(fn_t)rdft,
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(fn_t)rdft,
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(fn_t)rdft,
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(fn_t)rdft,
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(fn_t)_soxr_ordered_convolve_f,
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(fn_t)_soxr_ordered_partial_convolve_f,
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(fn_t)multiplier,
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(fn_t)nothing,
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};
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