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| 4349 | Serge | 1 | /* |
| 2 | * This file is part of FFmpeg. |
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| 3 | * |
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| 4 | * FFmpeg is free software; you can redistribute it and/or |
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| 5 | * modify it under the terms of the GNU Lesser General Public |
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| 6 | * License as published by the Free Software Foundation; either |
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| 7 | * version 2.1 of the License, or (at your option) any later version. |
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| 8 | * |
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| 9 | * FFmpeg is distributed in the hope that it will be useful, |
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| 10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 12 | * Lesser General Public License for more details. |
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| 13 | * |
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| 14 | * You should have received a copy of the GNU Lesser General Public |
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| 15 | * License along with FFmpeg; if not, write to the Free Software |
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| 16 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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| 17 | */ |
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| 18 | |||
| 19 | #ifndef AVUTIL_FLOAT_DSP_H |
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| 20 | #define AVUTIL_FLOAT_DSP_H |
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| 21 | |||
| 22 | #include "config.h" |
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| 23 | |||
| 24 | typedef struct AVFloatDSPContext { |
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| 25 | /** |
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| 26 | * Calculate the product of two vectors of floats and store the result in |
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| 27 | * a vector of floats. |
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| 28 | * |
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| 29 | * @param dst output vector |
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| 30 | * constraints: 32-byte aligned |
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| 31 | * @param src0 first input vector |
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| 32 | * constraints: 32-byte aligned |
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| 33 | * @param src1 second input vector |
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| 34 | * constraints: 32-byte aligned |
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| 35 | * @param len number of elements in the input |
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| 36 | * constraints: multiple of 16 |
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| 37 | */ |
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| 38 | void (*vector_fmul)(float *dst, const float *src0, const float *src1, |
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| 39 | int len); |
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| 40 | |||
| 41 | /** |
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| 42 | * Multiply a vector of floats by a scalar float and add to |
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| 43 | * destination vector. Source and destination vectors must |
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| 44 | * overlap exactly or not at all. |
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| 45 | * |
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| 46 | * @param dst result vector |
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| 47 | * constraints: 32-byte aligned |
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| 48 | * @param src input vector |
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| 49 | * constraints: 32-byte aligned |
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| 50 | * @param mul scalar value |
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| 51 | * @param len length of vector |
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| 52 | * constraints: multiple of 16 |
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| 53 | */ |
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| 54 | void (*vector_fmac_scalar)(float *dst, const float *src, float mul, |
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| 55 | int len); |
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| 56 | |||
| 57 | /** |
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| 58 | * Multiply a vector of floats by a scalar float. Source and |
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| 59 | * destination vectors must overlap exactly or not at all. |
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| 60 | * |
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| 61 | * @param dst result vector |
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| 62 | * constraints: 16-byte aligned |
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| 63 | * @param src input vector |
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| 64 | * constraints: 16-byte aligned |
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| 65 | * @param mul scalar value |
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| 66 | * @param len length of vector |
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| 67 | * constraints: multiple of 4 |
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| 68 | */ |
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| 69 | void (*vector_fmul_scalar)(float *dst, const float *src, float mul, |
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| 70 | int len); |
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| 71 | |||
| 72 | /** |
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| 73 | * Multiply a vector of double by a scalar double. Source and |
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| 74 | * destination vectors must overlap exactly or not at all. |
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| 75 | * |
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| 76 | * @param dst result vector |
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| 77 | * constraints: 32-byte aligned |
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| 78 | * @param src input vector |
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| 79 | * constraints: 32-byte aligned |
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| 80 | * @param mul scalar value |
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| 81 | * @param len length of vector |
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| 82 | * constraints: multiple of 8 |
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| 83 | */ |
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| 84 | void (*vector_dmul_scalar)(double *dst, const double *src, double mul, |
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| 85 | int len); |
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| 86 | |||
| 87 | /** |
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| 88 | * Overlap/add with window function. |
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| 89 | * Used primarily by MDCT-based audio codecs. |
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| 90 | * Source and destination vectors must overlap exactly or not at all. |
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| 91 | * |
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| 92 | * @param dst result vector |
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| 93 | * constraints: 16-byte aligned |
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| 94 | * @param src0 first source vector |
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| 95 | * constraints: 16-byte aligned |
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| 96 | * @param src1 second source vector |
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| 97 | * constraints: 16-byte aligned |
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| 98 | * @param win half-window vector |
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| 99 | * constraints: 16-byte aligned |
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| 100 | * @param len length of vector |
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| 101 | * constraints: multiple of 4 |
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| 102 | */ |
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| 103 | void (*vector_fmul_window)(float *dst, const float *src0, |
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| 104 | const float *src1, const float *win, int len); |
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| 105 | |||
| 106 | /** |
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| 107 | * Calculate the product of two vectors of floats, add a third vector of |
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| 108 | * floats and store the result in a vector of floats. |
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| 109 | * |
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| 110 | * @param dst output vector |
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| 111 | * constraints: 32-byte aligned |
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| 112 | * @param src0 first input vector |
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| 113 | * constraints: 32-byte aligned |
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| 114 | * @param src1 second input vector |
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| 115 | * constraints: 32-byte aligned |
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| 116 | * @param src1 third input vector |
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| 117 | * constraints: 32-byte aligned |
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| 118 | * @param len number of elements in the input |
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| 119 | * constraints: multiple of 16 |
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| 120 | */ |
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| 121 | void (*vector_fmul_add)(float *dst, const float *src0, const float *src1, |
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| 122 | const float *src2, int len); |
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| 123 | |||
| 124 | /** |
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| 125 | * Calculate the product of two vectors of floats, and store the result |
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| 126 | * in a vector of floats. The second vector of floats is iterated over |
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| 127 | * in reverse order. |
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| 128 | * |
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| 129 | * @param dst output vector |
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| 130 | * constraints: 32-byte aligned |
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| 131 | * @param src0 first input vector |
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| 132 | * constraints: 32-byte aligned |
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| 133 | * @param src1 second input vector |
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| 134 | * constraints: 32-byte aligned |
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| 135 | * @param src1 third input vector |
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| 136 | * constraints: 32-byte aligned |
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| 137 | * @param len number of elements in the input |
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| 138 | * constraints: multiple of 16 |
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| 139 | */ |
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| 140 | void (*vector_fmul_reverse)(float *dst, const float *src0, |
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| 141 | const float *src1, int len); |
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| 142 | |||
| 143 | /** |
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| 144 | * Calculate the sum and difference of two vectors of floats. |
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| 145 | * |
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| 146 | * @param v1 first input vector, sum output, 16-byte aligned |
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| 147 | * @param v2 second input vector, difference output, 16-byte aligned |
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| 148 | * @param len length of vectors, multiple of 4 |
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| 149 | */ |
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| 150 | void (*butterflies_float)(float *av_restrict v1, float *av_restrict v2, int len); |
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| 151 | |||
| 152 | /** |
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| 153 | * Calculate the scalar product of two vectors of floats. |
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| 154 | * |
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| 155 | * @param v1 first vector, 16-byte aligned |
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| 156 | * @param v2 second vector, 16-byte aligned |
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| 157 | * @param len length of vectors, multiple of 4 |
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| 158 | * |
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| 159 | * @return sum of elementwise products |
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| 160 | */ |
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| 161 | float (*scalarproduct_float)(const float *v1, const float *v2, int len); |
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| 162 | } AVFloatDSPContext; |
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| 163 | |||
| 164 | /** |
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| 165 | * Return the scalar product of two vectors. |
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| 166 | * |
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| 167 | * @param v1 first input vector |
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| 168 | * @param v2 first input vector |
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| 169 | * @param len number of elements |
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| 170 | * |
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| 171 | * @return sum of elementwise products |
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| 172 | */ |
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| 173 | float avpriv_scalarproduct_float_c(const float *v1, const float *v2, int len); |
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| 174 | |||
| 175 | /** |
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| 176 | * Initialize a float DSP context. |
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| 177 | * |
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| 178 | * @param fdsp float DSP context |
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| 179 | * @param strict setting to non-zero avoids using functions which may not be IEEE-754 compliant |
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| 180 | */ |
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| 181 | void avpriv_float_dsp_init(AVFloatDSPContext *fdsp, int strict); |
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| 182 | |||
| 183 | |||
| 184 | void ff_float_dsp_init_arm(AVFloatDSPContext *fdsp); |
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| 185 | void ff_float_dsp_init_ppc(AVFloatDSPContext *fdsp, int strict); |
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| 186 | void ff_float_dsp_init_x86(AVFloatDSPContext *fdsp); |
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| 187 | void ff_float_dsp_init_mips(AVFloatDSPContext *fdsp); |
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| 188 | |||
| 189 | #endif /* AVUTIL_FLOAT_DSP_H */ |