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6147 | serge | 1 | /* |
2 | * Copyright (c) 2012 |
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3 | * MIPS Technologies, Inc., California. |
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4 | * |
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5 | * Redistribution and use in source and binary forms, with or without |
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6 | * modification, are permitted provided that the following conditions |
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7 | * are met: |
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8 | * 1. Redistributions of source code must retain the above copyright |
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9 | * notice, this list of conditions and the following disclaimer. |
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10 | * 2. Redistributions in binary form must reproduce the above copyright |
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11 | * notice, this list of conditions and the following disclaimer in the |
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12 | * documentation and/or other materials provided with the distribution. |
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13 | * 3. Neither the name of the MIPS Technologies, Inc., nor the names of its |
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14 | * contributors may be used to endorse or promote products derived from |
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15 | * this software without specific prior written permission. |
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16 | * |
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17 | * THIS SOFTWARE IS PROVIDED BY THE MIPS TECHNOLOGIES, INC. ``AS IS'' AND |
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18 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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19 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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20 | * ARE DISCLAIMED. IN NO EVENT SHALL THE MIPS TECHNOLOGIES, INC. BE LIABLE |
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21 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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22 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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23 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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24 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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25 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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26 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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27 | * SUCH DAMAGE. |
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28 | * |
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29 | * Author: Nedeljko Babic (nedeljko.babic imgtec com) |
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30 | * |
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31 | * This file is part of FFmpeg. |
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32 | * |
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33 | * FFmpeg is free software; you can redistribute it and/or |
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34 | * modify it under the terms of the GNU Lesser General Public |
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35 | * License as published by the Free Software Foundation; either |
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36 | * version 2.1 of the License, or (at your option) any later version. |
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37 | * |
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38 | * FFmpeg is distributed in the hope that it will be useful, |
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39 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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40 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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41 | * Lesser General Public License for more details. |
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42 | * |
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43 | * You should have received a copy of the GNU Lesser General Public |
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44 | * License along with FFmpeg; if not, write to the Free Software |
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45 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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46 | */ |
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47 | |||
48 | #include "fixed_dsp.h" |
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49 | |||
50 | static void vector_fmul_add_c(int *dst, const int *src0, const int *src1, const int *src2, int len){ |
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51 | int i; |
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52 | int64_t accu; |
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53 | |||
54 | for (i=0; i |
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55 | accu = (int64_t)src0[i] * src1[i]; |
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56 | dst[i] = src2[i] + (int)((accu + 0x40000000) >> 31); |
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57 | } |
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58 | } |
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59 | |||
60 | static void vector_fmul_reverse_c(int *dst, const int *src0, const int *src1, int len) |
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61 | { |
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62 | int i; |
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63 | int64_t accu; |
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64 | |||
65 | src1 += len-1; |
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66 | for (i=0; i |
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67 | accu = (int64_t)src0[i] * src1[-i]; |
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68 | dst[i] = (int)((accu+0x40000000) >> 31); |
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69 | } |
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70 | } |
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71 | |||
72 | static void vector_fmul_window_scaled_c(int16_t *dst, const int32_t *src0, |
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73 | const int32_t *src1, const int32_t *win, |
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74 | int len, uint8_t bits) |
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75 | { |
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76 | int32_t s0, s1, wi, wj, i,j, round; |
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77 | |||
78 | dst += len; |
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79 | win += len; |
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80 | src0+= len; |
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81 | round = bits? 1 << (bits-1) : 0; |
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82 | |||
83 | for (i=-len, j=len-1; i<0; i++, j--) { |
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84 | s0 = src0[i]; |
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85 | s1 = src1[j]; |
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86 | wi = win[i]; |
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87 | wj = win[j]; |
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88 | dst[i] = av_clip_int16(((((int64_t)s0*wj - (int64_t)s1*wi + 0x40000000) >> 31) + round) >> bits); |
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89 | dst[j] = av_clip_int16(((((int64_t)s0*wi + (int64_t)s1*wj + 0x40000000) >> 31) + round) >> bits); |
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90 | } |
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91 | } |
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92 | |||
93 | static void vector_fmul_window_c(int32_t *dst, const int32_t *src0, |
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94 | const int32_t *src1, const int32_t *win, |
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95 | int len) |
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96 | { |
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97 | int32_t s0, s1, wi, wj, i, j; |
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98 | |||
99 | dst += len; |
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100 | win += len; |
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101 | src0+= len; |
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102 | |||
103 | for (i=-len, j=len-1; i<0; i++, j--) { |
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104 | s0 = src0[i]; |
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105 | s1 = src1[j]; |
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106 | wi = win[i]; |
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107 | wj = win[j]; |
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108 | dst[i] = ((int64_t)s0*wj - (int64_t)s1*wi + 0x40000000) >> 31; |
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109 | dst[j] = ((int64_t)s0*wi + (int64_t)s1*wj + 0x40000000) >> 31; |
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110 | } |
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111 | } |
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112 | |||
113 | static void vector_fmul_c(int *dst, const int *src0, const int *src1, int len) |
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114 | { |
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115 | int i; |
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116 | int64_t accu; |
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117 | |||
118 | for (i = 0; i < len; i++){ |
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119 | accu = (int64_t)src0[i] * src1[i]; |
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120 | dst[i] = (int)((accu+0x40000000) >> 31); |
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121 | } |
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122 | } |
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123 | |||
124 | static int scalarproduct_fixed_c(const int *v1, const int *v2, int len) |
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125 | { |
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126 | /** p is initialized with 0x40000000 so that the proper rounding will occur |
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127 | * at the end */ |
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128 | int64_t p = 0x40000000; |
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129 | int i; |
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130 | |||
131 | for (i = 0; i < len; i++) |
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132 | p += (int64_t)v1[i] * v2[i]; |
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133 | |||
134 | return (int)(p >> 31); |
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135 | } |
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136 | |||
137 | static void butterflies_fixed_c(int *v1, int *v2, int len) |
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138 | { |
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139 | int i; |
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140 | |||
141 | for (i = 0; i < len; i++){ |
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142 | int t = v1[i] - v2[i]; |
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143 | v1[i] += v2[i]; |
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144 | v2[i] = t; |
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145 | } |
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146 | } |
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147 | |||
148 | AVFixedDSPContext * avpriv_alloc_fixed_dsp(int bit_exact) |
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149 | { |
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150 | AVFixedDSPContext * fdsp = av_malloc(sizeof(AVFixedDSPContext)); |
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151 | |||
152 | if (!fdsp) |
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153 | return NULL; |
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154 | |||
155 | fdsp->vector_fmul_window_scaled = vector_fmul_window_scaled_c; |
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156 | fdsp->vector_fmul_window = vector_fmul_window_c; |
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157 | fdsp->vector_fmul = vector_fmul_c; |
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158 | fdsp->vector_fmul_add = vector_fmul_add_c; |
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159 | fdsp->vector_fmul_reverse = vector_fmul_reverse_c; |
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160 | fdsp->butterflies_fixed = butterflies_fixed_c; |
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161 | fdsp->scalarproduct_fixed = scalarproduct_fixed_c; |
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162 | |||
163 | return fdsp; |
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164 | }>>>0;>0;>><> |