| 1 | /* |
| 2 | * This file is part of FFmpeg. |
| 3 | * |
| 4 | * FFmpeg is free software; you can redistribute it and/or |
| 5 | * modify it under the terms of the GNU Lesser General Public |
| 6 | * License as published by the Free Software Foundation; either |
| 7 | * version 2.1 of the License, or (at your option) any later version. |
| 8 | * |
| 9 | * FFmpeg is distributed in the hope that it will be useful, |
| 10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 12 | * Lesser General Public License for more details. |
| 13 | * |
| 14 | * You should have received a copy of the GNU Lesser General Public |
| 15 | * License along with FFmpeg; if not, write to the Free Software |
| 16 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| 17 | */ |
| 18 | |
| 19 | #include "libavutil/attributes.h" |
| 20 | #include "libavutil/mem.h" |
| 21 | #include "avfft.h" |
| 22 | #include "fft.h" |
| 23 | #include "rdft.h" |
| 24 | #include "dct.h" |
| 25 | |
| 26 | /* FFT */ |
| 27 | |
| 28 | FFTContext *av_fft_init(int nbits, int inverse) |
| 29 | { |
| 30 | FFTContext *s = av_mallocz(sizeof(*s)); |
| 31 | |
| 32 | if (s && ff_fft_init(s, nbits, inverse)) |
| 33 | av_freep(&s); |
| 34 | |
| 35 | return s; |
| 36 | } |
| 37 | |
| 38 | void av_fft_permute(FFTContext *s, FFTComplex *z) |
| 39 | { |
| 40 | s->fft_permute(s, z); |
| 41 | } |
| 42 | |
| 43 | void av_fft_calc(FFTContext *s, FFTComplex *z) |
| 44 | { |
| 45 | s->fft_calc(s, z); |
| 46 | } |
| 47 | |
| 48 | av_cold void av_fft_end(FFTContext *s) |
| 49 | { |
| 50 | if (s) { |
| 51 | ff_fft_end(s); |
| 52 | av_free(s); |
| 53 | } |
| 54 | } |
| 55 | |
| 56 | #if CONFIG_MDCT |
| 57 | |
| 58 | FFTContext *av_mdct_init(int nbits, int inverse, double scale) |
| 59 | { |
| 60 | FFTContext *s = av_malloc(sizeof(*s)); |
| 61 | |
| 62 | if (s && ff_mdct_init(s, nbits, inverse, scale)) |
| 63 | av_freep(&s); |
| 64 | |
| 65 | return s; |
| 66 | } |
| 67 | |
| 68 | void av_imdct_calc(FFTContext *s, FFTSample *output, const FFTSample *input) |
| 69 | { |
| 70 | s->imdct_calc(s, output, input); |
| 71 | } |
| 72 | |
| 73 | void av_imdct_half(FFTContext *s, FFTSample *output, const FFTSample *input) |
| 74 | { |
| 75 | s->imdct_half(s, output, input); |
| 76 | } |
| 77 | |
| 78 | void av_mdct_calc(FFTContext *s, FFTSample *output, const FFTSample *input) |
| 79 | { |
| 80 | s->mdct_calc(s, output, input); |
| 81 | } |
| 82 | |
| 83 | av_cold void av_mdct_end(FFTContext *s) |
| 84 | { |
| 85 | if (s) { |
| 86 | ff_mdct_end(s); |
| 87 | av_free(s); |
| 88 | } |
| 89 | } |
| 90 | |
| 91 | #endif /* CONFIG_MDCT */ |
| 92 | |
| 93 | #if CONFIG_RDFT |
| 94 | |
| 95 | RDFTContext *av_rdft_init(int nbits, enum RDFTransformType trans) |
| 96 | { |
| 97 | RDFTContext *s = av_malloc(sizeof(*s)); |
| 98 | |
| 99 | if (s && ff_rdft_init(s, nbits, trans)) |
| 100 | av_freep(&s); |
| 101 | |
| 102 | return s; |
| 103 | } |
| 104 | |
| 105 | void av_rdft_calc(RDFTContext *s, FFTSample *data) |
| 106 | { |
| 107 | s->rdft_calc(s, data); |
| 108 | } |
| 109 | |
| 110 | av_cold void av_rdft_end(RDFTContext *s) |
| 111 | { |
| 112 | if (s) { |
| 113 | ff_rdft_end(s); |
| 114 | av_free(s); |
| 115 | } |
| 116 | } |
| 117 | |
| 118 | #endif /* CONFIG_RDFT */ |
| 119 | |
| 120 | #if CONFIG_DCT |
| 121 | |
| 122 | DCTContext *av_dct_init(int nbits, enum DCTTransformType inverse) |
| 123 | { |
| 124 | DCTContext *s = av_malloc(sizeof(*s)); |
| 125 | |
| 126 | if (s && ff_dct_init(s, nbits, inverse)) |
| 127 | av_freep(&s); |
| 128 | |
| 129 | return s; |
| 130 | } |
| 131 | |
| 132 | void av_dct_calc(DCTContext *s, FFTSample *data) |
| 133 | { |
| 134 | s->dct_calc(s, data); |
| 135 | } |
| 136 | |
| 137 | av_cold void av_dct_end(DCTContext *s) |
| 138 | { |
| 139 | if (s) { |
| 140 | ff_dct_end(s); |
| 141 | av_free(s); |
| 142 | } |
| 143 | } |
| 144 | |
| 145 | #endif /* CONFIG_DCT */ |