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1 /* Quicktime muxer plugin for GStreamer |
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2 * Copyright (C) 2008 Thiago Sousa Santos <thiagoss@embedded.ufcg.edu.br> |
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3 * |
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4 * This library is free software; you can redistribute it and/or |
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5 * modify it under the terms of the GNU Library General Public |
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6 * License as published by the Free Software Foundation; either |
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7 * version 2 of the License, or (at your option) any later version. |
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8 * |
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9 * This library 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 * Library 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 Library General Public |
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15 * License along with this library; if not, write to the |
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16 * Free Software Foundation, Inc., 59 Temple Place - Suite 330, |
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17 * Boston, MA 02111-1307, USA. |
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18 */ |
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19 /* |
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20 * Unless otherwise indicated, Source Code is licensed under MIT license. |
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21 * See further explanation attached in License Statement (distributed in the file |
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22 * LICENSE). |
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23 * |
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24 * Permission is hereby granted, free of charge, to any person obtaining a copy of |
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25 * this software and associated documentation files (the "Software"), to deal in |
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26 * the Software without restriction, including without limitation the rights to |
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27 * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies |
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28 * of the Software, and to permit persons to whom the Software is furnished to do |
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29 * so, subject to the following conditions: |
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30 * |
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31 * The above copyright notice and this permission notice shall be included in all |
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32 * copies or substantial portions of the Software. |
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33 * |
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34 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
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35 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
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36 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
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37 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
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38 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
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39 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
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40 * SOFTWARE. |
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41 */ |
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42 |
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43 #include "properties.h" |
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44 |
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45 /* if needed, re-allocate buffer to ensure size bytes can be written into it |
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46 * at offset */ |
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47 void |
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48 prop_copy_ensure_buffer (guint8 ** buffer, guint64 * bsize, guint64 * offset, |
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49 guint64 size) |
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50 { |
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51 if (buffer && *bsize - *offset < size) { |
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52 *bsize += size + 10 * 1024; |
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53 *buffer = g_realloc (*buffer, *bsize); |
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54 } |
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55 } |
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56 |
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57 static guint64 |
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58 copy_func (void *prop, guint size, guint8 ** buffer, guint64 * bsize, |
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59 guint64 * offset) |
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60 { |
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61 if (buffer) { |
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62 prop_copy_ensure_buffer (buffer, bsize, offset, size); |
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63 memcpy (*buffer + *offset, prop, size); |
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64 } |
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65 *offset += size; |
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66 return size; |
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67 } |
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68 |
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69 #define INT_ARRAY_COPY_FUNC_FAST(name, datatype) \ |
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70 guint64 prop_copy_ ## name ## _array (datatype *prop, guint size, \ |
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71 guint8 ** buffer, guint64 * bsize, guint64 * offset) { \ |
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72 return copy_func (prop, sizeof (datatype) * size, buffer, bsize, offset);\ |
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73 } |
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74 |
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75 #define INT_ARRAY_COPY_FUNC(name, datatype) \ |
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76 guint64 prop_copy_ ## name ## _array (datatype *prop, guint size, \ |
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77 guint8 ** buffer, guint64 * bsize, guint64 * offset) { \ |
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78 guint i; \ |
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79 \ |
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80 for (i = 0; i < size; i++) { \ |
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81 prop_copy_ ## name (prop[i], buffer, bsize, offset); \ |
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82 } \ |
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83 return sizeof (datatype) * size; \ |
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84 } |
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85 |
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86 /* INTEGERS */ |
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87 guint64 |
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88 prop_copy_uint8 (guint8 prop, guint8 ** buffer, guint64 * size, |
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89 guint64 * offset) |
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90 { |
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91 return copy_func (&prop, sizeof (guint8), buffer, size, offset); |
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92 } |
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93 |
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94 guint64 |
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95 prop_copy_uint16 (guint16 prop, guint8 ** buffer, guint64 * size, |
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96 guint64 * offset) |
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97 { |
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98 prop = GUINT16_TO_BE (prop); |
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99 return copy_func (&prop, sizeof (guint16), buffer, size, offset); |
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100 } |
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101 |
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102 guint64 |
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103 prop_copy_uint32 (guint32 prop, guint8 ** buffer, guint64 * size, |
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104 guint64 * offset) |
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105 { |
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106 prop = GUINT32_TO_BE (prop); |
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107 return copy_func (&prop, sizeof (guint32), buffer, size, offset); |
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108 } |
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109 |
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110 guint64 |
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111 prop_copy_uint64 (guint64 prop, guint8 ** buffer, guint64 * size, |
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112 guint64 * offset) |
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113 { |
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114 prop = GUINT64_TO_BE (prop); |
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115 return copy_func (&prop, sizeof (guint64), buffer, size, offset); |
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116 } |
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117 |
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118 guint64 |
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119 prop_copy_int32 (gint32 prop, guint8 ** buffer, guint64 * size, |
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120 guint64 * offset) |
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121 { |
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122 prop = GINT32_TO_BE (prop); |
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123 return copy_func (&prop, sizeof (guint32), buffer, size, offset); |
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124 } |
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125 |
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126 /* uint8 can use direct copy in any case, and may be used for large quantity */ |
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127 INT_ARRAY_COPY_FUNC_FAST (uint8, guint8); |
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128 /* not used in large quantity anyway */ |
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129 INT_ARRAY_COPY_FUNC (uint16, guint16); |
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130 INT_ARRAY_COPY_FUNC (uint32, guint32); |
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131 INT_ARRAY_COPY_FUNC (uint64, guint64); |
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132 |
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133 /* FOURCC */ |
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134 guint64 |
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135 prop_copy_fourcc (guint32 prop, guint8 ** buffer, guint64 * size, |
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136 guint64 * offset) |
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137 { |
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138 prop = GINT32_TO_LE (prop); |
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139 return copy_func (&prop, sizeof (guint32), buffer, size, offset); |
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140 } |
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141 |
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142 INT_ARRAY_COPY_FUNC (fourcc, guint32); |
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143 |
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144 /** |
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145 * Copies a string of bytes without placing its size at the beginning. |
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146 * |
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147 * @string: the string to be copied |
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148 * @str_size: size of the string |
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149 * @buffer: the array to copy the string to |
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150 * @offset: the position in the buffer array. |
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151 * This value is updated to the point right after the copied string. |
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152 * |
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153 * Returns: the number of bytes copied |
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154 */ |
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155 guint64 |
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156 prop_copy_fixed_size_string (guint8 * string, guint str_size, guint8 ** buffer, |
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157 guint64 * size, guint64 * offset) |
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158 { |
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159 return copy_func (string, str_size * sizeof (guint8), buffer, size, offset); |
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160 } |
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161 |
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162 /** |
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163 * Copies a string and its size to an array. Example: |
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164 * string = 'abc\0' |
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165 * result in the array: [3][a][b][c] (each [x] represents a position) |
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166 * |
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167 * @string: the string to be copied |
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168 * @str_size: size of the string |
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169 * @buffer: the array to copy the string to |
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170 * @offset: the position in the buffer array. |
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171 * This value is updated to the point right after the copied string. |
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172 * |
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173 * Returns: the number of bytes copied |
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174 */ |
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175 guint64 |
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176 prop_copy_size_string (guint8 * string, guint str_size, guint8 ** buffer, |
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177 guint64 * size, guint64 * offset) |
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178 { |
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179 guint64 original_offset = *offset; |
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180 |
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181 prop_copy_uint8 (str_size, buffer, size, offset); |
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182 prop_copy_fixed_size_string (string, str_size, buffer, size, offset); |
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183 return *offset - original_offset; |
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184 } |
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185 |
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186 /** |
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187 * Copies a string including its null terminating char to an array. |
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188 * |
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189 * @string: the string to be copied |
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190 * @buffer: the array to copy the string to |
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191 * @offset: the position in the buffer array. |
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192 * This value is updated to the point right after the copied string. |
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193 * |
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194 * Returns: the number of bytes copied |
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195 */ |
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196 guint64 |
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197 prop_copy_null_terminated_string (gchar * string, guint8 ** buffer, |
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198 guint64 * size, guint64 * offset) |
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199 { |
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200 guint64 original_offset = *offset; |
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201 guint len = strlen (string); |
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202 |
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203 prop_copy_fixed_size_string ((guint8 *) string, len, buffer, size, offset); |
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204 prop_copy_uint8 ('\0', buffer, size, offset); |
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205 return *offset - original_offset; |
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206 } |