mirror of https://github.com/FFmpeg/FFmpeg.git
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
142 lines
2.7 KiB
142 lines
2.7 KiB
/* |
|
* 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/mem.h" |
|
#include "avfft.h" |
|
#include "fft.h" |
|
|
|
/* FFT */ |
|
|
|
FFTContext *av_fft_init(int nbits, int inverse) |
|
{ |
|
FFTContext *s = av_malloc(sizeof(*s)); |
|
|
|
if (s) |
|
ff_fft_init(s, nbits, inverse); |
|
|
|
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); |
|
} |
|
|
|
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); |
|
|
|
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); |
|
} |
|
|
|
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); |
|
|
|
return s; |
|
} |
|
|
|
void av_rdft_calc(RDFTContext *s, FFTSample *data) |
|
{ |
|
ff_rdft_calc(s, data); |
|
} |
|
|
|
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, int inverse) |
|
{ |
|
DCTContext *s = av_malloc(sizeof(*s)); |
|
|
|
if (s) |
|
ff_dct_init(s, nbits, inverse); |
|
|
|
return s; |
|
} |
|
|
|
void av_dct_calc(DCTContext *s, FFTSample *data) |
|
{ |
|
ff_dct_calc(s, data); |
|
} |
|
|
|
void av_dct_end(DCTContext *s) |
|
{ |
|
if (s) { |
|
ff_dct_end(s); |
|
av_free(s); |
|
} |
|
} |
|
|
|
#endif /* CONFIG_DCT */
|
|
|