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: #include "libavutil/mem.h"
yading@10: #include "avfft.h"
yading@10: #include "fft.h"
yading@10: #include "rdft.h"
yading@10: #include "dct.h"
yading@10: 
yading@10: /* FFT */
yading@10: 
yading@10: FFTContext *av_fft_init(int nbits, int inverse)
yading@10: {
yading@10:     FFTContext *s = av_malloc(sizeof(*s));
yading@10: 
yading@10:     if (s && ff_fft_init(s, nbits, inverse))
yading@10:         av_freep(&s);
yading@10: 
yading@10:     return s;
yading@10: }
yading@10: 
yading@10: void av_fft_permute(FFTContext *s, FFTComplex *z)
yading@10: {
yading@10:     s->fft_permute(s, z);
yading@10: }
yading@10: 
yading@10: void av_fft_calc(FFTContext *s, FFTComplex *z)
yading@10: {
yading@10:     s->fft_calc(s, z);
yading@10: }
yading@10: 
yading@10: void av_fft_end(FFTContext *s)
yading@10: {
yading@10:     if (s) {
yading@10:         ff_fft_end(s);
yading@10:         av_free(s);
yading@10:     }
yading@10: }
yading@10: 
yading@10: #if CONFIG_MDCT
yading@10: 
yading@10: FFTContext *av_mdct_init(int nbits, int inverse, double scale)
yading@10: {
yading@10:     FFTContext *s = av_malloc(sizeof(*s));
yading@10: 
yading@10:     if (s && ff_mdct_init(s, nbits, inverse, scale))
yading@10:         av_freep(&s);
yading@10: 
yading@10:     return s;
yading@10: }
yading@10: 
yading@10: void av_imdct_calc(FFTContext *s, FFTSample *output, const FFTSample *input)
yading@10: {
yading@10:     s->imdct_calc(s, output, input);
yading@10: }
yading@10: 
yading@10: void av_imdct_half(FFTContext *s, FFTSample *output, const FFTSample *input)
yading@10: {
yading@10:     s->imdct_half(s, output, input);
yading@10: }
yading@10: 
yading@10: void av_mdct_calc(FFTContext *s, FFTSample *output, const FFTSample *input)
yading@10: {
yading@10:     s->mdct_calc(s, output, input);
yading@10: }
yading@10: 
yading@10: void av_mdct_end(FFTContext *s)
yading@10: {
yading@10:     if (s) {
yading@10:         ff_mdct_end(s);
yading@10:         av_free(s);
yading@10:     }
yading@10: }
yading@10: 
yading@10: #endif /* CONFIG_MDCT */
yading@10: 
yading@10: #if CONFIG_RDFT
yading@10: 
yading@10: RDFTContext *av_rdft_init(int nbits, enum RDFTransformType trans)
yading@10: {
yading@10:     RDFTContext *s = av_malloc(sizeof(*s));
yading@10: 
yading@10:     if (s && ff_rdft_init(s, nbits, trans))
yading@10:         av_freep(&s);
yading@10: 
yading@10:     return s;
yading@10: }
yading@10: 
yading@10: void av_rdft_calc(RDFTContext *s, FFTSample *data)
yading@10: {
yading@10:     s->rdft_calc(s, data);
yading@10: }
yading@10: 
yading@10: void av_rdft_end(RDFTContext *s)
yading@10: {
yading@10:     if (s) {
yading@10:         ff_rdft_end(s);
yading@10:         av_free(s);
yading@10:     }
yading@10: }
yading@10: 
yading@10: #endif /* CONFIG_RDFT */
yading@10: 
yading@10: #if CONFIG_DCT
yading@10: 
yading@10: DCTContext *av_dct_init(int nbits, enum DCTTransformType inverse)
yading@10: {
yading@10:     DCTContext *s = av_malloc(sizeof(*s));
yading@10: 
yading@10:     if (s && ff_dct_init(s, nbits, inverse))
yading@10:         av_freep(&s);
yading@10: 
yading@10:     return s;
yading@10: }
yading@10: 
yading@10: void av_dct_calc(DCTContext *s, FFTSample *data)
yading@10: {
yading@10:     s->dct_calc(s, data);
yading@10: }
yading@10: 
yading@10: void av_dct_end(DCTContext *s)
yading@10: {
yading@10:     if (s) {
yading@10:         ff_dct_end(s);
yading@10:         av_free(s);
yading@10:     }
yading@10: }
yading@10: 
yading@10: #endif /* CONFIG_DCT */