1 /* |
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2 * This file is part of Libav. |
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3 * |
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4 * Libav 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 * Libav 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 Libav; 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 |
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19 #ifndef AVUTIL_INTREADWRITE_H |
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20 #define AVUTIL_INTREADWRITE_H |
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21 |
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22 #include <stdint.h> |
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23 #include "libavutil/avconfig.h" |
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24 #include "attributes.h" |
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25 #include "bswap.h" |
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26 |
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27 typedef union { |
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28 uint64_t u64; |
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29 uint32_t u32[2]; |
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30 uint16_t u16[4]; |
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31 uint8_t u8 [8]; |
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32 double f64; |
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33 float f32[2]; |
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34 } av_alias av_alias64; |
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35 |
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36 typedef union { |
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37 uint32_t u32; |
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38 uint16_t u16[2]; |
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39 uint8_t u8 [4]; |
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40 float f32; |
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41 } av_alias av_alias32; |
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42 |
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43 typedef union { |
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44 uint16_t u16; |
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45 uint8_t u8 [2]; |
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46 } av_alias av_alias16; |
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47 |
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48 /* |
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49 * Arch-specific headers can provide any combination of |
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50 * AV_[RW][BLN](16|24|32|64) and AV_(COPY|SWAP|ZERO)(64|128) macros. |
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51 * Preprocessor symbols must be defined, even if these are implemented |
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52 * as inline functions. |
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53 */ |
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54 |
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55 #ifdef HAVE_AV_CONFIG_H |
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56 |
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57 #include "config.h" |
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58 |
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59 #if ARCH_ARM |
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60 # include "arm/intreadwrite.h" |
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61 #elif ARCH_AVR32 |
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62 # include "avr32/intreadwrite.h" |
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63 #elif ARCH_MIPS |
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64 # include "mips/intreadwrite.h" |
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65 #elif ARCH_PPC |
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66 # include "ppc/intreadwrite.h" |
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67 #elif ARCH_TOMI |
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68 # include "tomi/intreadwrite.h" |
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69 #elif ARCH_X86 |
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70 # include "x86/intreadwrite.h" |
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71 #endif |
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72 |
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73 #endif /* HAVE_AV_CONFIG_H */ |
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74 |
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75 /* |
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76 * Map AV_RNXX <-> AV_R[BL]XX for all variants provided by per-arch headers. |
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77 */ |
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78 |
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79 #if AV_HAVE_BIGENDIAN |
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80 |
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81 # if defined(AV_RN16) && !defined(AV_RB16) |
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82 # define AV_RB16(p) AV_RN16(p) |
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83 # elif !defined(AV_RN16) && defined(AV_RB16) |
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84 # define AV_RN16(p) AV_RB16(p) |
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85 # endif |
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86 |
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87 # if defined(AV_WN16) && !defined(AV_WB16) |
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88 # define AV_WB16(p, v) AV_WN16(p, v) |
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89 # elif !defined(AV_WN16) && defined(AV_WB16) |
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90 # define AV_WN16(p, v) AV_WB16(p, v) |
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91 # endif |
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92 |
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93 # if defined(AV_RN24) && !defined(AV_RB24) |
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94 # define AV_RB24(p) AV_RN24(p) |
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95 # elif !defined(AV_RN24) && defined(AV_RB24) |
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96 # define AV_RN24(p) AV_RB24(p) |
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97 # endif |
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98 |
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99 # if defined(AV_WN24) && !defined(AV_WB24) |
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100 # define AV_WB24(p, v) AV_WN24(p, v) |
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101 # elif !defined(AV_WN24) && defined(AV_WB24) |
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102 # define AV_WN24(p, v) AV_WB24(p, v) |
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103 # endif |
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104 |
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105 # if defined(AV_RN32) && !defined(AV_RB32) |
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106 # define AV_RB32(p) AV_RN32(p) |
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107 # elif !defined(AV_RN32) && defined(AV_RB32) |
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108 # define AV_RN32(p) AV_RB32(p) |
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109 # endif |
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110 |
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111 # if defined(AV_WN32) && !defined(AV_WB32) |
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112 # define AV_WB32(p, v) AV_WN32(p, v) |
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113 # elif !defined(AV_WN32) && defined(AV_WB32) |
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114 # define AV_WN32(p, v) AV_WB32(p, v) |
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115 # endif |
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116 |
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117 # if defined(AV_RN64) && !defined(AV_RB64) |
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118 # define AV_RB64(p) AV_RN64(p) |
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119 # elif !defined(AV_RN64) && defined(AV_RB64) |
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120 # define AV_RN64(p) AV_RB64(p) |
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121 # endif |
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122 |
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123 # if defined(AV_WN64) && !defined(AV_WB64) |
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124 # define AV_WB64(p, v) AV_WN64(p, v) |
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125 # elif !defined(AV_WN64) && defined(AV_WB64) |
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126 # define AV_WN64(p, v) AV_WB64(p, v) |
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127 # endif |
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128 |
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129 #else /* AV_HAVE_BIGENDIAN */ |
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130 |
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131 # if defined(AV_RN16) && !defined(AV_RL16) |
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132 # define AV_RL16(p) AV_RN16(p) |
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133 # elif !defined(AV_RN16) && defined(AV_RL16) |
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134 # define AV_RN16(p) AV_RL16(p) |
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135 # endif |
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136 |
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137 # if defined(AV_WN16) && !defined(AV_WL16) |
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138 # define AV_WL16(p, v) AV_WN16(p, v) |
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139 # elif !defined(AV_WN16) && defined(AV_WL16) |
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140 # define AV_WN16(p, v) AV_WL16(p, v) |
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141 # endif |
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142 |
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143 # if defined(AV_RN24) && !defined(AV_RL24) |
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144 # define AV_RL24(p) AV_RN24(p) |
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145 # elif !defined(AV_RN24) && defined(AV_RL24) |
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146 # define AV_RN24(p) AV_RL24(p) |
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147 # endif |
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148 |
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149 # if defined(AV_WN24) && !defined(AV_WL24) |
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150 # define AV_WL24(p, v) AV_WN24(p, v) |
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151 # elif !defined(AV_WN24) && defined(AV_WL24) |
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152 # define AV_WN24(p, v) AV_WL24(p, v) |
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153 # endif |
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154 |
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155 # if defined(AV_RN32) && !defined(AV_RL32) |
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156 # define AV_RL32(p) AV_RN32(p) |
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157 # elif !defined(AV_RN32) && defined(AV_RL32) |
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158 # define AV_RN32(p) AV_RL32(p) |
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159 # endif |
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160 |
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161 # if defined(AV_WN32) && !defined(AV_WL32) |
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162 # define AV_WL32(p, v) AV_WN32(p, v) |
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163 # elif !defined(AV_WN32) && defined(AV_WL32) |
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164 # define AV_WN32(p, v) AV_WL32(p, v) |
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165 # endif |
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166 |
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167 # if defined(AV_RN64) && !defined(AV_RL64) |
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168 # define AV_RL64(p) AV_RN64(p) |
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169 # elif !defined(AV_RN64) && defined(AV_RL64) |
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170 # define AV_RN64(p) AV_RL64(p) |
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171 # endif |
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172 |
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173 # if defined(AV_WN64) && !defined(AV_WL64) |
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174 # define AV_WL64(p, v) AV_WN64(p, v) |
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175 # elif !defined(AV_WN64) && defined(AV_WL64) |
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176 # define AV_WN64(p, v) AV_WL64(p, v) |
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177 # endif |
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178 |
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179 #endif /* !AV_HAVE_BIGENDIAN */ |
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180 |
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181 /* |
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182 * Define AV_[RW]N helper macros to simplify definitions not provided |
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183 * by per-arch headers. |
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184 */ |
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185 |
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186 #if defined(__GNUC__) && !defined(__TI_COMPILER_VERSION__) |
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187 |
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188 union unaligned_64 { uint64_t l; } __attribute__((packed)) av_alias; |
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189 union unaligned_32 { uint32_t l; } __attribute__((packed)) av_alias; |
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190 union unaligned_16 { uint16_t l; } __attribute__((packed)) av_alias; |
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191 |
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192 # define AV_RN(s, p) (((const union unaligned_##s *) (p))->l) |
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193 # define AV_WN(s, p, v) ((((union unaligned_##s *) (p))->l) = (v)) |
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194 |
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195 #elif defined(__DECC) |
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196 |
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197 # define AV_RN(s, p) (*((const __unaligned uint##s##_t*)(p))) |
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198 # define AV_WN(s, p, v) (*((__unaligned uint##s##_t*)(p)) = (v)) |
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199 |
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200 #elif AV_HAVE_FAST_UNALIGNED |
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201 |
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202 # define AV_RN(s, p) (((const av_alias##s*)(p))->u##s) |
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203 # define AV_WN(s, p, v) (((av_alias##s*)(p))->u##s = (v)) |
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204 |
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205 #else |
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206 |
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207 #ifndef AV_RB16 |
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208 # define AV_RB16(x) \ |
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209 ((((const uint8_t*)(x))[0] << 8) | \ |
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210 ((const uint8_t*)(x))[1]) |
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211 #endif |
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212 #ifndef AV_WB16 |
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213 # define AV_WB16(p, d) do { \ |
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214 ((uint8_t*)(p))[1] = (d); \ |
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215 ((uint8_t*)(p))[0] = (d)>>8; \ |
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216 } while(0) |
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217 #endif |
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218 |
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219 #ifndef AV_RL16 |
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220 # define AV_RL16(x) \ |
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221 ((((const uint8_t*)(x))[1] << 8) | \ |
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222 ((const uint8_t*)(x))[0]) |
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223 #endif |
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224 #ifndef AV_WL16 |
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225 # define AV_WL16(p, d) do { \ |
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226 ((uint8_t*)(p))[0] = (d); \ |
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227 ((uint8_t*)(p))[1] = (d)>>8; \ |
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228 } while(0) |
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229 #endif |
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230 |
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231 #ifndef AV_RB32 |
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232 # define AV_RB32(x) \ |
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233 (((uint32_t)((const uint8_t*)(x))[0] << 24) | \ |
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234 (((const uint8_t*)(x))[1] << 16) | \ |
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235 (((const uint8_t*)(x))[2] << 8) | \ |
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236 ((const uint8_t*)(x))[3]) |
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237 #endif |
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238 #ifndef AV_WB32 |
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239 # define AV_WB32(p, d) do { \ |
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240 ((uint8_t*)(p))[3] = (d); \ |
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241 ((uint8_t*)(p))[2] = (d)>>8; \ |
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242 ((uint8_t*)(p))[1] = (d)>>16; \ |
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243 ((uint8_t*)(p))[0] = (d)>>24; \ |
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244 } while(0) |
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245 #endif |
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246 |
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247 #ifndef AV_RL32 |
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248 # define AV_RL32(x) \ |
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249 (((uint32_t)((const uint8_t*)(x))[3] << 24) | \ |
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250 (((const uint8_t*)(x))[2] << 16) | \ |
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251 (((const uint8_t*)(x))[1] << 8) | \ |
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252 ((const uint8_t*)(x))[0]) |
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253 #endif |
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254 #ifndef AV_WL32 |
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255 # define AV_WL32(p, d) do { \ |
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256 ((uint8_t*)(p))[0] = (d); \ |
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257 ((uint8_t*)(p))[1] = (d)>>8; \ |
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258 ((uint8_t*)(p))[2] = (d)>>16; \ |
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259 ((uint8_t*)(p))[3] = (d)>>24; \ |
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260 } while(0) |
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261 #endif |
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262 |
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263 #ifndef AV_RB64 |
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264 # define AV_RB64(x) \ |
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265 (((uint64_t)((const uint8_t*)(x))[0] << 56) | \ |
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266 ((uint64_t)((const uint8_t*)(x))[1] << 48) | \ |
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267 ((uint64_t)((const uint8_t*)(x))[2] << 40) | \ |
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268 ((uint64_t)((const uint8_t*)(x))[3] << 32) | \ |
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269 ((uint64_t)((const uint8_t*)(x))[4] << 24) | \ |
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270 ((uint64_t)((const uint8_t*)(x))[5] << 16) | \ |
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271 ((uint64_t)((const uint8_t*)(x))[6] << 8) | \ |
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272 (uint64_t)((const uint8_t*)(x))[7]) |
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273 #endif |
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274 #ifndef AV_WB64 |
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275 # define AV_WB64(p, d) do { \ |
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276 ((uint8_t*)(p))[7] = (d); \ |
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277 ((uint8_t*)(p))[6] = (d)>>8; \ |
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278 ((uint8_t*)(p))[5] = (d)>>16; \ |
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279 ((uint8_t*)(p))[4] = (d)>>24; \ |
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280 ((uint8_t*)(p))[3] = (d)>>32; \ |
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281 ((uint8_t*)(p))[2] = (d)>>40; \ |
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282 ((uint8_t*)(p))[1] = (d)>>48; \ |
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283 ((uint8_t*)(p))[0] = (d)>>56; \ |
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284 } while(0) |
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285 #endif |
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286 |
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287 #ifndef AV_RL64 |
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288 # define AV_RL64(x) \ |
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289 (((uint64_t)((const uint8_t*)(x))[7] << 56) | \ |
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290 ((uint64_t)((const uint8_t*)(x))[6] << 48) | \ |
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291 ((uint64_t)((const uint8_t*)(x))[5] << 40) | \ |
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292 ((uint64_t)((const uint8_t*)(x))[4] << 32) | \ |
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293 ((uint64_t)((const uint8_t*)(x))[3] << 24) | \ |
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294 ((uint64_t)((const uint8_t*)(x))[2] << 16) | \ |
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295 ((uint64_t)((const uint8_t*)(x))[1] << 8) | \ |
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296 (uint64_t)((const uint8_t*)(x))[0]) |
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297 #endif |
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298 #ifndef AV_WL64 |
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299 # define AV_WL64(p, d) do { \ |
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300 ((uint8_t*)(p))[0] = (d); \ |
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301 ((uint8_t*)(p))[1] = (d)>>8; \ |
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302 ((uint8_t*)(p))[2] = (d)>>16; \ |
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303 ((uint8_t*)(p))[3] = (d)>>24; \ |
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304 ((uint8_t*)(p))[4] = (d)>>32; \ |
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305 ((uint8_t*)(p))[5] = (d)>>40; \ |
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306 ((uint8_t*)(p))[6] = (d)>>48; \ |
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307 ((uint8_t*)(p))[7] = (d)>>56; \ |
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308 } while(0) |
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309 #endif |
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310 |
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311 #if AV_HAVE_BIGENDIAN |
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312 # define AV_RN(s, p) AV_RB##s(p) |
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313 # define AV_WN(s, p, v) AV_WB##s(p, v) |
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314 #else |
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315 # define AV_RN(s, p) AV_RL##s(p) |
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316 # define AV_WN(s, p, v) AV_WL##s(p, v) |
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317 #endif |
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318 |
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319 #endif /* HAVE_FAST_UNALIGNED */ |
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320 |
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321 #ifndef AV_RN16 |
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322 # define AV_RN16(p) AV_RN(16, p) |
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323 #endif |
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324 |
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325 #ifndef AV_RN32 |
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326 # define AV_RN32(p) AV_RN(32, p) |
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327 #endif |
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328 |
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329 #ifndef AV_RN64 |
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330 # define AV_RN64(p) AV_RN(64, p) |
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331 #endif |
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332 |
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333 #ifndef AV_WN16 |
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334 # define AV_WN16(p, v) AV_WN(16, p, v) |
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335 #endif |
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336 |
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337 #ifndef AV_WN32 |
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338 # define AV_WN32(p, v) AV_WN(32, p, v) |
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339 #endif |
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340 |
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341 #ifndef AV_WN64 |
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342 # define AV_WN64(p, v) AV_WN(64, p, v) |
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343 #endif |
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344 |
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345 #if AV_HAVE_BIGENDIAN |
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346 # define AV_RB(s, p) AV_RN##s(p) |
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347 # define AV_WB(s, p, v) AV_WN##s(p, v) |
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348 # define AV_RL(s, p) av_bswap##s(AV_RN##s(p)) |
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349 # define AV_WL(s, p, v) AV_WN##s(p, av_bswap##s(v)) |
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350 #else |
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351 # define AV_RB(s, p) av_bswap##s(AV_RN##s(p)) |
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352 # define AV_WB(s, p, v) AV_WN##s(p, av_bswap##s(v)) |
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353 # define AV_RL(s, p) AV_RN##s(p) |
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354 # define AV_WL(s, p, v) AV_WN##s(p, v) |
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355 #endif |
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356 |
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357 #define AV_RB8(x) (((const uint8_t*)(x))[0]) |
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358 #define AV_WB8(p, d) do { ((uint8_t*)(p))[0] = (d); } while(0) |
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359 |
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360 #define AV_RL8(x) AV_RB8(x) |
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361 #define AV_WL8(p, d) AV_WB8(p, d) |
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362 |
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363 #ifndef AV_RB16 |
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364 # define AV_RB16(p) AV_RB(16, p) |
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365 #endif |
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366 #ifndef AV_WB16 |
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367 # define AV_WB16(p, v) AV_WB(16, p, v) |
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368 #endif |
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369 |
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370 #ifndef AV_RL16 |
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371 # define AV_RL16(p) AV_RL(16, p) |
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372 #endif |
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373 #ifndef AV_WL16 |
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374 # define AV_WL16(p, v) AV_WL(16, p, v) |
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375 #endif |
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376 |
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377 #ifndef AV_RB32 |
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378 # define AV_RB32(p) AV_RB(32, p) |
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379 #endif |
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380 #ifndef AV_WB32 |
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381 # define AV_WB32(p, v) AV_WB(32, p, v) |
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382 #endif |
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383 |
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384 #ifndef AV_RL32 |
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385 # define AV_RL32(p) AV_RL(32, p) |
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386 #endif |
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387 #ifndef AV_WL32 |
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388 # define AV_WL32(p, v) AV_WL(32, p, v) |
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389 #endif |
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390 |
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391 #ifndef AV_RB64 |
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392 # define AV_RB64(p) AV_RB(64, p) |
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393 #endif |
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394 #ifndef AV_WB64 |
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395 # define AV_WB64(p, v) AV_WB(64, p, v) |
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396 #endif |
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397 |
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398 #ifndef AV_RL64 |
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399 # define AV_RL64(p) AV_RL(64, p) |
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400 #endif |
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401 #ifndef AV_WL64 |
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402 # define AV_WL64(p, v) AV_WL(64, p, v) |
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403 #endif |
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404 |
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405 #ifndef AV_RB24 |
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406 # define AV_RB24(x) \ |
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407 ((((const uint8_t*)(x))[0] << 16) | \ |
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408 (((const uint8_t*)(x))[1] << 8) | \ |
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409 ((const uint8_t*)(x))[2]) |
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410 #endif |
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411 #ifndef AV_WB24 |
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412 # define AV_WB24(p, d) do { \ |
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413 ((uint8_t*)(p))[2] = (d); \ |
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414 ((uint8_t*)(p))[1] = (d)>>8; \ |
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415 ((uint8_t*)(p))[0] = (d)>>16; \ |
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416 } while(0) |
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417 #endif |
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418 |
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419 #ifndef AV_RL24 |
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420 # define AV_RL24(x) \ |
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421 ((((const uint8_t*)(x))[2] << 16) | \ |
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422 (((const uint8_t*)(x))[1] << 8) | \ |
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423 ((const uint8_t*)(x))[0]) |
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424 #endif |
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425 #ifndef AV_WL24 |
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426 # define AV_WL24(p, d) do { \ |
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427 ((uint8_t*)(p))[0] = (d); \ |
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428 ((uint8_t*)(p))[1] = (d)>>8; \ |
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429 ((uint8_t*)(p))[2] = (d)>>16; \ |
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430 } while(0) |
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431 #endif |
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432 |
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433 /* |
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434 * The AV_[RW]NA macros access naturally aligned data |
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435 * in a type-safe way. |
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436 */ |
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437 |
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438 #define AV_RNA(s, p) (((const av_alias##s*)(p))->u##s) |
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439 #define AV_WNA(s, p, v) (((av_alias##s*)(p))->u##s = (v)) |
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440 |
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441 #ifndef AV_RN16A |
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442 # define AV_RN16A(p) AV_RNA(16, p) |
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443 #endif |
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444 |
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445 #ifndef AV_RN32A |
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446 # define AV_RN32A(p) AV_RNA(32, p) |
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447 #endif |
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448 |
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449 #ifndef AV_RN64A |
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450 # define AV_RN64A(p) AV_RNA(64, p) |
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451 #endif |
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452 |
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453 #ifndef AV_WN16A |
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454 # define AV_WN16A(p, v) AV_WNA(16, p, v) |
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455 #endif |
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456 |
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457 #ifndef AV_WN32A |
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458 # define AV_WN32A(p, v) AV_WNA(32, p, v) |
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459 #endif |
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460 |
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461 #ifndef AV_WN64A |
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462 # define AV_WN64A(p, v) AV_WNA(64, p, v) |
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463 #endif |
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464 |
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465 /* Parameters for AV_COPY*, AV_SWAP*, AV_ZERO* must be |
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466 * naturally aligned. They may be implemented using MMX, |
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467 * so emms_c() must be called before using any float code |
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468 * afterwards. |
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469 */ |
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470 |
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471 #define AV_COPY(n, d, s) \ |
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472 (((av_alias##n*)(d))->u##n = ((const av_alias##n*)(s))->u##n) |
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473 |
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474 #ifndef AV_COPY16 |
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475 # define AV_COPY16(d, s) AV_COPY(16, d, s) |
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476 #endif |
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477 |
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478 #ifndef AV_COPY32 |
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479 # define AV_COPY32(d, s) AV_COPY(32, d, s) |
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480 #endif |
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481 |
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482 #ifndef AV_COPY64 |
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483 # define AV_COPY64(d, s) AV_COPY(64, d, s) |
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484 #endif |
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485 |
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486 #ifndef AV_COPY128 |
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487 # define AV_COPY128(d, s) \ |
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488 do { \ |
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489 AV_COPY64(d, s); \ |
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490 AV_COPY64((char*)(d)+8, (char*)(s)+8); \ |
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491 } while(0) |
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492 #endif |
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493 |
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494 #define AV_SWAP(n, a, b) FFSWAP(av_alias##n, *(av_alias##n*)(a), *(av_alias##n*)(b)) |
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495 |
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496 #ifndef AV_SWAP64 |
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497 # define AV_SWAP64(a, b) AV_SWAP(64, a, b) |
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498 #endif |
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499 |
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500 #define AV_ZERO(n, d) (((av_alias##n*)(d))->u##n = 0) |
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501 |
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502 #ifndef AV_ZERO16 |
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503 # define AV_ZERO16(d) AV_ZERO(16, d) |
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504 #endif |
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505 |
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506 #ifndef AV_ZERO32 |
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507 # define AV_ZERO32(d) AV_ZERO(32, d) |
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508 #endif |
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509 |
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510 #ifndef AV_ZERO64 |
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511 # define AV_ZERO64(d) AV_ZERO(64, d) |
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512 #endif |
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513 |
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514 #ifndef AV_ZERO128 |
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515 # define AV_ZERO128(d) \ |
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516 do { \ |
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517 AV_ZERO64(d); \ |
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518 AV_ZERO64((char*)(d)+8); \ |
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519 } while(0) |
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520 #endif |
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521 |
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522 #endif /* AVUTIL_INTREADWRITE_H */ |
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