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142 lines
2.7 KiB
142 lines
2.7 KiB
/* |
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* This file is part of FFmpeg. |
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* |
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* FFmpeg is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Lesser General Public |
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* License as published by the Free Software Foundation; either |
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* version 2.1 of the License, or (at your option) any later version. |
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* |
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* FFmpeg is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public |
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* License along with FFmpeg; if not, write to the Free Software |
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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*/ |
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#include "libavutil/mem.h" |
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#include "avfft.h" |
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#include "fft.h" |
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/* FFT */ |
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FFTContext *av_fft_init(int nbits, int inverse) |
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{ |
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FFTContext *s = av_malloc(sizeof(*s)); |
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if (s && ff_fft_init(s, nbits, inverse)) |
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av_freep(&s); |
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return s; |
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} |
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void av_fft_permute(FFTContext *s, FFTComplex *z) |
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{ |
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s->fft_permute(s, z); |
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} |
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void av_fft_calc(FFTContext *s, FFTComplex *z) |
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{ |
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s->fft_calc(s, z); |
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} |
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void av_fft_end(FFTContext *s) |
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{ |
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if (s) { |
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ff_fft_end(s); |
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av_free(s); |
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} |
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} |
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#if CONFIG_MDCT |
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FFTContext *av_mdct_init(int nbits, int inverse, double scale) |
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{ |
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FFTContext *s = av_malloc(sizeof(*s)); |
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if (s && ff_mdct_init(s, nbits, inverse, scale)) |
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av_freep(&s); |
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return s; |
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} |
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void av_imdct_calc(FFTContext *s, FFTSample *output, const FFTSample *input) |
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{ |
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s->imdct_calc(s, output, input); |
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} |
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void av_imdct_half(FFTContext *s, FFTSample *output, const FFTSample *input) |
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{ |
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s->imdct_half(s, output, input); |
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} |
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void av_mdct_calc(FFTContext *s, FFTSample *output, const FFTSample *input) |
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{ |
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s->mdct_calc(s, output, input); |
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} |
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void av_mdct_end(FFTContext *s) |
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{ |
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if (s) { |
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ff_mdct_end(s); |
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av_free(s); |
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} |
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} |
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#endif /* CONFIG_MDCT */ |
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#if CONFIG_RDFT |
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RDFTContext *av_rdft_init(int nbits, enum RDFTransformType trans) |
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{ |
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RDFTContext *s = av_malloc(sizeof(*s)); |
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if (s && ff_rdft_init(s, nbits, trans)) |
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av_freep(&s); |
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return s; |
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} |
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void av_rdft_calc(RDFTContext *s, FFTSample *data) |
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{ |
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ff_rdft_calc(s, data); |
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} |
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void av_rdft_end(RDFTContext *s) |
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{ |
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if (s) { |
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ff_rdft_end(s); |
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av_free(s); |
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} |
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} |
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#endif /* CONFIG_RDFT */ |
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#if CONFIG_DCT |
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DCTContext *av_dct_init(int nbits, enum DCTTransformType inverse) |
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{ |
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DCTContext *s = av_malloc(sizeof(*s)); |
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if (s && ff_dct_init(s, nbits, inverse)) |
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av_freep(&s); |
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return s; |
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} |
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void av_dct_calc(DCTContext *s, FFTSample *data) |
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{ |
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ff_dct_calc(s, data); |
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} |
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void av_dct_end(DCTContext *s) |
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{ |
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if (s) { |
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ff_dct_end(s); |
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av_free(s); |
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} |
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} |
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#endif /* CONFIG_DCT */
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