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4349 | Serge | 1 | /* |
2 | * VP8 compatible video decoder |
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3 | * |
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4 | * Copyright (C) 2010 David Conrad |
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5 | * |
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6 | * This file is part of FFmpeg. |
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7 | * |
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8 | * FFmpeg is free software; you can redistribute it and/or |
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9 | * modify it under the terms of the GNU Lesser General Public |
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10 | * License as published by the Free Software Foundation; either |
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11 | * version 2.1 of the License, or (at your option) any later version. |
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12 | * |
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13 | * FFmpeg is distributed in the hope that it will be useful, |
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14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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16 | * Lesser General Public License for more details. |
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17 | * |
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18 | * You should have received a copy of the GNU Lesser General Public |
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19 | * License along with FFmpeg; if not, write to the Free Software |
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20 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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21 | */ |
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22 | |||
23 | #include "config.h" |
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24 | #include "libavutil/cpu.h" |
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25 | #include "libavutil/mem.h" |
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26 | #include "libavutil/ppc/types_altivec.h" |
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27 | #include "libavutil/ppc/util_altivec.h" |
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28 | #include "libavcodec/vp8dsp.h" |
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29 | #include "dsputil_altivec.h" |
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30 | |||
31 | #if HAVE_ALTIVEC |
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32 | #define REPT4(...) { __VA_ARGS__, __VA_ARGS__, __VA_ARGS__, __VA_ARGS__ } |
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33 | |||
34 | // h subpel filter uses msum to multiply+add 4 pixel taps at once |
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35 | static const vec_s8 h_subpel_filters_inner[7] = |
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36 | { |
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37 | REPT4( -6, 123, 12, -1), |
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38 | REPT4(-11, 108, 36, -8), |
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39 | REPT4( -9, 93, 50, -6), |
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40 | REPT4(-16, 77, 77, -16), |
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41 | REPT4( -6, 50, 93, -9), |
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42 | REPT4( -8, 36, 108, -11), |
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43 | REPT4( -1, 12, 123, -6), |
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44 | }; |
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45 | |||
46 | // for 6tap filters, these are the outer two taps |
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47 | // The zeros mask off pixels 4-7 when filtering 0-3 |
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48 | // and vice-versa |
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49 | static const vec_s8 h_subpel_filters_outer[3] = |
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50 | { |
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51 | REPT4(0, 0, 2, 1), |
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52 | REPT4(0, 0, 3, 3), |
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53 | REPT4(0, 0, 1, 2), |
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54 | }; |
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55 | |||
56 | #define LOAD_H_SUBPEL_FILTER(i) \ |
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57 | vec_s8 filter_inner = h_subpel_filters_inner[i]; \ |
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58 | vec_s8 filter_outerh = h_subpel_filters_outer[(i)>>1]; \ |
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59 | vec_s8 filter_outerl = vec_sld(filter_outerh, filter_outerh, 2) |
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60 | |||
61 | #define FILTER_H(dstv, off) \ |
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62 | a = vec_ld((off)-is6tap-1, src); \ |
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63 | b = vec_ld((off)-is6tap-1+15, src); \ |
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64 | \ |
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65 | pixh = vec_perm(a, b, permh##off); \ |
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66 | pixl = vec_perm(a, b, perml##off); \ |
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67 | filth = vec_msum(filter_inner, pixh, c64); \ |
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68 | filtl = vec_msum(filter_inner, pixl, c64); \ |
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69 | \ |
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70 | if (is6tap) { \ |
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71 | outer = vec_perm(a, b, perm_6tap##off); \ |
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72 | filth = vec_msum(filter_outerh, outer, filth); \ |
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73 | filtl = vec_msum(filter_outerl, outer, filtl); \ |
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74 | } \ |
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75 | if (w == 4) \ |
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76 | filtl = filth; /* discard pixels 4-7 */ \ |
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77 | dstv = vec_packs(filth, filtl); \ |
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78 | dstv = vec_sra(dstv, c7) |
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79 | |||
80 | static av_always_inline |
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81 | void put_vp8_epel_h_altivec_core(uint8_t *dst, ptrdiff_t dst_stride, |
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82 | uint8_t *src, ptrdiff_t src_stride, |
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83 | int h, int mx, int w, int is6tap) |
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84 | { |
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85 | LOAD_H_SUBPEL_FILTER(mx-1); |
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86 | vec_u8 align_vec0, align_vec8, permh0, permh8, filt; |
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87 | vec_u8 perm_6tap0, perm_6tap8, perml0, perml8; |
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88 | vec_u8 a, b, pixh, pixl, outer; |
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89 | vec_s16 f16h, f16l; |
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90 | vec_s32 filth, filtl; |
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91 | |||
92 | vec_u8 perm_inner6 = { 1,2,3,4, 2,3,4,5, 3,4,5,6, 4,5,6,7 }; |
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93 | vec_u8 perm_inner4 = { 0,1,2,3, 1,2,3,4, 2,3,4,5, 3,4,5,6 }; |
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94 | vec_u8 perm_inner = is6tap ? perm_inner6 : perm_inner4; |
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95 | vec_u8 perm_outer = { 4,9, 0,5, 5,10, 1,6, 6,11, 2,7, 7,12, 3,8 }; |
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96 | vec_s32 c64 = vec_sl(vec_splat_s32(1), vec_splat_u32(6)); |
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97 | vec_u16 c7 = vec_splat_u16(7); |
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98 | |||
99 | align_vec0 = vec_lvsl( -is6tap-1, src); |
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100 | align_vec8 = vec_lvsl(8-is6tap-1, src); |
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101 | |||
102 | permh0 = vec_perm(align_vec0, align_vec0, perm_inner); |
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103 | permh8 = vec_perm(align_vec8, align_vec8, perm_inner); |
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104 | perm_inner = vec_add(perm_inner, vec_splat_u8(4)); |
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105 | perml0 = vec_perm(align_vec0, align_vec0, perm_inner); |
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106 | perml8 = vec_perm(align_vec8, align_vec8, perm_inner); |
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107 | perm_6tap0 = vec_perm(align_vec0, align_vec0, perm_outer); |
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108 | perm_6tap8 = vec_perm(align_vec8, align_vec8, perm_outer); |
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109 | |||
110 | while (h --> 0) { |
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111 | FILTER_H(f16h, 0); |
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112 | |||
113 | if (w == 16) { |
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114 | FILTER_H(f16l, 8); |
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115 | filt = vec_packsu(f16h, f16l); |
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116 | vec_st(filt, 0, dst); |
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117 | } else { |
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118 | filt = vec_packsu(f16h, f16h); |
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119 | vec_ste((vec_u32)filt, 0, (uint32_t*)dst); |
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120 | if (w == 8) |
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121 | vec_ste((vec_u32)filt, 4, (uint32_t*)dst); |
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122 | } |
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123 | src += src_stride; |
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124 | dst += dst_stride; |
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125 | } |
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126 | } |
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127 | |||
128 | // v subpel filter does a simple vertical multiply + add |
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129 | static const vec_u8 v_subpel_filters[7] = |
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130 | { |
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131 | { 0, 6, 123, 12, 1, 0 }, |
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132 | { 2, 11, 108, 36, 8, 1 }, |
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133 | { 0, 9, 93, 50, 6, 0 }, |
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134 | { 3, 16, 77, 77, 16, 3 }, |
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135 | { 0, 6, 50, 93, 9, 0 }, |
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136 | { 1, 8, 36, 108, 11, 2 }, |
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137 | { 0, 1, 12, 123, 6, 0 }, |
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138 | }; |
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139 | |||
140 | #define LOAD_V_SUBPEL_FILTER(i) \ |
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141 | vec_u8 subpel_filter = v_subpel_filters[i]; \ |
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142 | vec_u8 f0 = vec_splat(subpel_filter, 0); \ |
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143 | vec_u8 f1 = vec_splat(subpel_filter, 1); \ |
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144 | vec_u8 f2 = vec_splat(subpel_filter, 2); \ |
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145 | vec_u8 f3 = vec_splat(subpel_filter, 3); \ |
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146 | vec_u8 f4 = vec_splat(subpel_filter, 4); \ |
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147 | vec_u8 f5 = vec_splat(subpel_filter, 5) |
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148 | |||
149 | #define FILTER_V(dstv, vec_mul) \ |
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150 | s1f = (vec_s16)vec_mul(s1, f1); \ |
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151 | s2f = (vec_s16)vec_mul(s2, f2); \ |
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152 | s3f = (vec_s16)vec_mul(s3, f3); \ |
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153 | s4f = (vec_s16)vec_mul(s4, f4); \ |
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154 | s2f = vec_subs(s2f, s1f); \ |
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155 | s3f = vec_subs(s3f, s4f); \ |
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156 | if (is6tap) { \ |
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157 | s0f = (vec_s16)vec_mul(s0, f0); \ |
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158 | s5f = (vec_s16)vec_mul(s5, f5); \ |
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159 | s2f = vec_adds(s2f, s0f); \ |
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160 | s3f = vec_adds(s3f, s5f); \ |
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161 | } \ |
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162 | dstv = vec_adds(s2f, s3f); \ |
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163 | dstv = vec_adds(dstv, c64); \ |
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164 | dstv = vec_sra(dstv, c7) |
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165 | |||
166 | static av_always_inline |
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167 | void put_vp8_epel_v_altivec_core(uint8_t *dst, ptrdiff_t dst_stride, |
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168 | uint8_t *src, ptrdiff_t src_stride, |
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169 | int h, int my, int w, int is6tap) |
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170 | { |
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171 | LOAD_V_SUBPEL_FILTER(my-1); |
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172 | vec_u8 s0, s1, s2, s3, s4, s5, filt, align_vech, perm_vec, align_vecl; |
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173 | vec_s16 s0f, s1f, s2f, s3f, s4f, s5f, f16h, f16l; |
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174 | vec_s16 c64 = vec_sl(vec_splat_s16(1), vec_splat_u16(6)); |
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175 | vec_u16 c7 = vec_splat_u16(7); |
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176 | |||
177 | // we want pixels 0-7 to be in the even positions and 8-15 in the odd, |
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178 | // so combine this permute with the alignment permute vector |
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179 | align_vech = vec_lvsl(0, src); |
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180 | align_vecl = vec_sld(align_vech, align_vech, 8); |
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181 | if (w ==16) |
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182 | perm_vec = vec_mergeh(align_vech, align_vecl); |
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183 | else |
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184 | perm_vec = vec_mergeh(align_vech, align_vech); |
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185 | |||
186 | if (is6tap) |
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187 | s0 = load_with_perm_vec(-2*src_stride, src, perm_vec); |
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188 | s1 = load_with_perm_vec(-1*src_stride, src, perm_vec); |
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189 | s2 = load_with_perm_vec( 0*src_stride, src, perm_vec); |
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190 | s3 = load_with_perm_vec( 1*src_stride, src, perm_vec); |
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191 | if (is6tap) |
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192 | s4 = load_with_perm_vec( 2*src_stride, src, perm_vec); |
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193 | |||
194 | src += (2+is6tap)*src_stride; |
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195 | |||
196 | while (h --> 0) { |
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197 | if (is6tap) |
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198 | s5 = load_with_perm_vec(0, src, perm_vec); |
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199 | else |
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200 | s4 = load_with_perm_vec(0, src, perm_vec); |
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201 | |||
202 | FILTER_V(f16h, vec_mule); |
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203 | |||
204 | if (w == 16) { |
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205 | FILTER_V(f16l, vec_mulo); |
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206 | filt = vec_packsu(f16h, f16l); |
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207 | vec_st(filt, 0, dst); |
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208 | } else { |
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209 | filt = vec_packsu(f16h, f16h); |
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210 | if (w == 4) |
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211 | filt = (vec_u8)vec_splat((vec_u32)filt, 0); |
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212 | else |
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213 | vec_ste((vec_u32)filt, 4, (uint32_t*)dst); |
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214 | vec_ste((vec_u32)filt, 0, (uint32_t*)dst); |
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215 | } |
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216 | |||
217 | if (is6tap) |
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218 | s0 = s1; |
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219 | s1 = s2; |
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220 | s2 = s3; |
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221 | s3 = s4; |
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222 | if (is6tap) |
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223 | s4 = s5; |
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224 | |||
225 | dst += dst_stride; |
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226 | src += src_stride; |
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227 | } |
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228 | } |
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229 | |||
230 | #define EPEL_FUNCS(WIDTH, TAPS) \ |
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231 | static av_noinline \ |
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232 | void put_vp8_epel ## WIDTH ## _h ## TAPS ## _altivec(uint8_t *dst, ptrdiff_t dst_stride, uint8_t *src, ptrdiff_t src_stride, int h, int mx, int my) \ |
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233 | { \ |
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234 | put_vp8_epel_h_altivec_core(dst, dst_stride, src, src_stride, h, mx, WIDTH, TAPS == 6); \ |
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235 | } \ |
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236 | \ |
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237 | static av_noinline \ |
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238 | void put_vp8_epel ## WIDTH ## _v ## TAPS ## _altivec(uint8_t *dst, ptrdiff_t dst_stride, uint8_t *src, ptrdiff_t src_stride, int h, int mx, int my) \ |
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239 | { \ |
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240 | put_vp8_epel_v_altivec_core(dst, dst_stride, src, src_stride, h, my, WIDTH, TAPS == 6); \ |
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241 | } |
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242 | |||
243 | #define EPEL_HV(WIDTH, HTAPS, VTAPS) \ |
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244 | static void put_vp8_epel ## WIDTH ## _h ## HTAPS ## v ## VTAPS ## _altivec(uint8_t *dst, ptrdiff_t dstride, uint8_t *src, ptrdiff_t sstride, int h, int mx, int my) \ |
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245 | { \ |
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246 | DECLARE_ALIGNED(16, uint8_t, tmp)[(2*WIDTH+5)*16]; \ |
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247 | if (VTAPS == 6) { \ |
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248 | put_vp8_epel ## WIDTH ## _h ## HTAPS ## _altivec(tmp, 16, src-2*sstride, sstride, h+5, mx, my); \ |
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249 | put_vp8_epel ## WIDTH ## _v ## VTAPS ## _altivec(dst, dstride, tmp+2*16, 16, h, mx, my); \ |
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250 | } else { \ |
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251 | put_vp8_epel ## WIDTH ## _h ## HTAPS ## _altivec(tmp, 16, src-sstride, sstride, h+4, mx, my); \ |
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252 | put_vp8_epel ## WIDTH ## _v ## VTAPS ## _altivec(dst, dstride, tmp+16, 16, h, mx, my); \ |
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253 | } \ |
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254 | } |
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255 | |||
256 | EPEL_FUNCS(16,6) |
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257 | EPEL_FUNCS(8, 6) |
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258 | EPEL_FUNCS(8, 4) |
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259 | EPEL_FUNCS(4, 6) |
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260 | EPEL_FUNCS(4, 4) |
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261 | |||
262 | EPEL_HV(16, 6,6) |
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263 | EPEL_HV(8, 6,6) |
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264 | EPEL_HV(8, 4,6) |
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265 | EPEL_HV(8, 6,4) |
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266 | EPEL_HV(8, 4,4) |
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267 | EPEL_HV(4, 6,6) |
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268 | EPEL_HV(4, 4,6) |
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269 | EPEL_HV(4, 6,4) |
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270 | EPEL_HV(4, 4,4) |
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271 | |||
272 | static void put_vp8_pixels16_altivec(uint8_t *dst, ptrdiff_t dstride, uint8_t *src, ptrdiff_t sstride, int h, int mx, int my) |
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273 | { |
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274 | register vector unsigned char pixelsv1, pixelsv2; |
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275 | register vector unsigned char pixelsv1B, pixelsv2B; |
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276 | register vector unsigned char pixelsv1C, pixelsv2C; |
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277 | register vector unsigned char pixelsv1D, pixelsv2D; |
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278 | |||
279 | register vector unsigned char perm = vec_lvsl(0, src); |
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280 | int i; |
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281 | register ptrdiff_t dstride2 = dstride << 1, sstride2 = sstride << 1; |
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282 | register ptrdiff_t dstride3 = dstride2 + dstride, sstride3 = sstride + sstride2; |
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283 | register ptrdiff_t dstride4 = dstride << 2, sstride4 = sstride << 2; |
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284 | |||
285 | // hand-unrolling the loop by 4 gains about 15% |
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286 | // mininum execution time goes from 74 to 60 cycles |
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287 | // it's faster than -funroll-loops, but using |
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288 | // -funroll-loops w/ this is bad - 74 cycles again. |
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289 | // all this is on a 7450, tuning for the 7450 |
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290 | for (i = 0; i < h; i += 4) { |
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291 | pixelsv1 = vec_ld( 0, src); |
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292 | pixelsv2 = vec_ld(15, src); |
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293 | pixelsv1B = vec_ld(sstride, src); |
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294 | pixelsv2B = vec_ld(15 + sstride, src); |
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295 | pixelsv1C = vec_ld(sstride2, src); |
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296 | pixelsv2C = vec_ld(15 + sstride2, src); |
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297 | pixelsv1D = vec_ld(sstride3, src); |
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298 | pixelsv2D = vec_ld(15 + sstride3, src); |
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299 | vec_st(vec_perm(pixelsv1, pixelsv2, perm), |
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300 | 0, (unsigned char*)dst); |
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301 | vec_st(vec_perm(pixelsv1B, pixelsv2B, perm), |
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302 | dstride, (unsigned char*)dst); |
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303 | vec_st(vec_perm(pixelsv1C, pixelsv2C, perm), |
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304 | dstride2, (unsigned char*)dst); |
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305 | vec_st(vec_perm(pixelsv1D, pixelsv2D, perm), |
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306 | dstride3, (unsigned char*)dst); |
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307 | src += sstride4; |
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308 | dst += dstride4; |
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309 | } |
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310 | } |
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311 | |||
312 | #endif /* HAVE_ALTIVEC */ |
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313 | |||
314 | av_cold void ff_vp8dsp_init_ppc(VP8DSPContext *c) |
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315 | { |
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316 | #if HAVE_ALTIVEC |
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317 | if (!(av_get_cpu_flags() & AV_CPU_FLAG_ALTIVEC)) |
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318 | return; |
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319 | |||
320 | c->put_vp8_epel_pixels_tab[0][0][0] = put_vp8_pixels16_altivec; |
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321 | c->put_vp8_epel_pixels_tab[0][0][2] = put_vp8_epel16_h6_altivec; |
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322 | c->put_vp8_epel_pixels_tab[0][2][0] = put_vp8_epel16_v6_altivec; |
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323 | c->put_vp8_epel_pixels_tab[0][2][2] = put_vp8_epel16_h6v6_altivec; |
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324 | |||
325 | c->put_vp8_epel_pixels_tab[1][0][2] = put_vp8_epel8_h6_altivec; |
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326 | c->put_vp8_epel_pixels_tab[1][2][0] = put_vp8_epel8_v6_altivec; |
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327 | c->put_vp8_epel_pixels_tab[1][0][1] = put_vp8_epel8_h4_altivec; |
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328 | c->put_vp8_epel_pixels_tab[1][1][0] = put_vp8_epel8_v4_altivec; |
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329 | |||
330 | c->put_vp8_epel_pixels_tab[1][2][2] = put_vp8_epel8_h6v6_altivec; |
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331 | c->put_vp8_epel_pixels_tab[1][1][1] = put_vp8_epel8_h4v4_altivec; |
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332 | c->put_vp8_epel_pixels_tab[1][1][2] = put_vp8_epel8_h6v4_altivec; |
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333 | c->put_vp8_epel_pixels_tab[1][2][1] = put_vp8_epel8_h4v6_altivec; |
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334 | |||
335 | c->put_vp8_epel_pixels_tab[2][0][2] = put_vp8_epel4_h6_altivec; |
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336 | c->put_vp8_epel_pixels_tab[2][2][0] = put_vp8_epel4_v6_altivec; |
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337 | c->put_vp8_epel_pixels_tab[2][0][1] = put_vp8_epel4_h4_altivec; |
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338 | c->put_vp8_epel_pixels_tab[2][1][0] = put_vp8_epel4_v4_altivec; |
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339 | |||
340 | c->put_vp8_epel_pixels_tab[2][2][2] = put_vp8_epel4_h6v6_altivec; |
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341 | c->put_vp8_epel_pixels_tab[2][1][1] = put_vp8_epel4_h4v4_altivec; |
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342 | c->put_vp8_epel_pixels_tab[2][1][2] = put_vp8_epel4_h6v4_altivec; |
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343 | c->put_vp8_epel_pixels_tab[2][2][1] = put_vp8_epel4_h4v6_altivec; |
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344 | #endif /* HAVE_ALTIVEC */ |
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345 | }>><>><>><>><> |