/* * This file is part of FFmpeg. * * FFmpeg 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. * * FFmpeg 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 FFmpeg; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ #include "libavutil/attributes.h"#include "libavutil/mem.h"#include "avfft.h"#include "fft.h"#include "rdft.h"#include "dct.h" /* FFT */ FFTContext *av_fft_init(int nbits, int inverse){    FFTContext *s = av_mallocz(sizeof(*s));     if (s && ff_fft_init(s, nbits, inverse))        av_freep(&s);     return s;} void av_fft_permute(FFTContext *s, FFTComplex *z){    s->fft_permute(s, z);} void av_fft_calc(FFTContext *s, FFTComplex *z){    s->fft_calc(s, z);} av_cold void av_fft_end(FFTContext *s){    if (s) {        ff_fft_end(s);        av_free(s);    }} #if CONFIG_MDCT FFTContext *av_mdct_init(int nbits, int inverse, double scale){    FFTContext *s = av_malloc(sizeof(*s));     if (s && ff_mdct_init(s, nbits, inverse, scale))        av_freep(&s);     return s;} void av_imdct_calc(FFTContext *s, FFTSample *output, const FFTSample *input){    s->imdct_calc(s, output, input);} void av_imdct_half(FFTContext *s, FFTSample *output, const FFTSample *input){    s->imdct_half(s, output, input);} void av_mdct_calc(FFTContext *s, FFTSample *output, const FFTSample *input){    s->mdct_calc(s, output, input);} av_cold void av_mdct_end(FFTContext *s){    if (s) {        ff_mdct_end(s);        av_free(s);    }} #endif /* CONFIG_MDCT */ #if CONFIG_RDFT RDFTContext *av_rdft_init(int nbits, enum RDFTransformType trans){    RDFTContext *s = av_malloc(sizeof(*s));     if (s && ff_rdft_init(s, nbits, trans))        av_freep(&s);     return s;} void av_rdft_calc(RDFTContext *s, FFTSample *data){    s->rdft_calc(s, data);} av_cold void av_rdft_end(RDFTContext *s){    if (s) {        ff_rdft_end(s);        av_free(s);    }} #endif /* CONFIG_RDFT */ #if CONFIG_DCT DCTContext *av_dct_init(int nbits, enum DCTTransformType inverse){    DCTContext *s = av_malloc(sizeof(*s));     if (s && ff_dct_init(s, nbits, inverse))        av_freep(&s);     return s;} void av_dct_calc(DCTContext *s, FFTSample *data){    s->dct_calc(s, data);} av_cold void av_dct_end(DCTContext *s){    if (s) {        ff_dct_end(s);        av_free(s);    }} #endif /* CONFIG_DCT */