1 | #include "alutInternal.h" |
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2 | |
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3 | static enum |
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4 | { |
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5 | Unintialized, /* ALUT has not been initialized yet or has been de-initialised */ |
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6 | ALUTDeviceAndContext, /* alutInit has been called successfully */ |
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7 | ExternalDeviceAndContext /* alutInitWithoutContext has been called */ |
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8 | } initialisationState = Unintialized; |
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9 | |
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10 | /* |
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11 | * Note: alutContext contains something valid only when initialisationState |
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12 | * contains ALUTDeviceAndContext. |
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13 | */ |
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14 | static ALCcontext *alutContext; |
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15 | |
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16 | ALboolean |
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17 | _alutSanityCheck (void) |
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18 | { |
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19 | ALCcontext *context; |
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20 | |
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21 | if (initialisationState == Unintialized) |
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22 | { |
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23 | _alutSetError (ALUT_ERROR_INVALID_OPERATION); |
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24 | return AL_FALSE; |
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25 | } |
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26 | |
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27 | context = alcGetCurrentContext (); |
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28 | if (context == NULL) |
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29 | { |
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30 | _alutSetError (ALUT_ERROR_NO_CURRENT_CONTEXT); |
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31 | return AL_FALSE; |
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32 | } |
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33 | |
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34 | if (alGetError () != AL_NO_ERROR) |
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35 | { |
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36 | _alutSetError (ALUT_ERROR_AL_ERROR_ON_ENTRY); |
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37 | return AL_FALSE; |
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38 | } |
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39 | |
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40 | if (alcGetError (alcGetContextsDevice (context)) != ALC_NO_ERROR) |
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41 | { |
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42 | _alutSetError (ALUT_ERROR_ALC_ERROR_ON_ENTRY); |
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43 | return AL_FALSE; |
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44 | } |
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45 | |
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46 | return AL_TRUE; |
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47 | } |
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48 | |
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49 | ALboolean |
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50 | alutInit (int *argcp, char **argv) |
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51 | { |
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52 | ALCdevice *device; |
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53 | ALCcontext *context; |
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54 | |
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55 | if (initialisationState != Unintialized) |
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56 | { |
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57 | _alutSetError (ALUT_ERROR_INVALID_OPERATION); |
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58 | return AL_FALSE; |
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59 | } |
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60 | |
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61 | if ((argcp == NULL) != (argv == NULL)) |
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62 | { |
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63 | _alutSetError (ALUT_ERROR_INVALID_VALUE); |
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64 | return AL_FALSE; |
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65 | } |
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66 | |
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67 | device = alcOpenDevice (NULL); |
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68 | if (device == NULL) |
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69 | { |
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70 | _alutSetError (ALUT_ERROR_OPEN_DEVICE); |
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71 | return AL_FALSE; |
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72 | } |
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73 | |
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74 | context = alcCreateContext (device, NULL); |
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75 | if (context == NULL) |
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76 | { |
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77 | alcCloseDevice (device); |
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78 | _alutSetError (ALUT_ERROR_CREATE_CONTEXT); |
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79 | return AL_FALSE; |
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80 | } |
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81 | |
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82 | if (!alcMakeContextCurrent (context)) |
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83 | { |
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84 | alcDestroyContext (context); |
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85 | alcCloseDevice (device); |
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86 | _alutSetError (ALUT_ERROR_MAKE_CONTEXT_CURRENT); |
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87 | return AL_FALSE; |
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88 | } |
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89 | |
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90 | initialisationState = ALUTDeviceAndContext; |
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91 | alutContext = context; |
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92 | return AL_TRUE; |
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93 | } |
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94 | |
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95 | ALboolean |
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96 | alutInitWithoutContext (int *argcp, char **argv) |
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97 | { |
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98 | if (initialisationState != Unintialized) |
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99 | { |
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100 | _alutSetError (ALUT_ERROR_INVALID_OPERATION); |
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101 | return AL_FALSE; |
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102 | } |
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103 | |
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104 | if ((argcp == NULL) != (argv == NULL)) |
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105 | { |
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106 | _alutSetError (ALUT_ERROR_INVALID_VALUE); |
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107 | return AL_FALSE; |
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108 | } |
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109 | |
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110 | initialisationState = ExternalDeviceAndContext; |
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111 | return AL_TRUE; |
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112 | } |
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113 | |
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114 | ALboolean |
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115 | alutExit (void) |
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116 | { |
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117 | ALCdevice *device; |
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118 | |
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119 | if (initialisationState == Unintialized) |
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120 | { |
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121 | _alutSetError (ALUT_ERROR_INVALID_OPERATION); |
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122 | return AL_FALSE; |
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123 | } |
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124 | |
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125 | if (initialisationState == ExternalDeviceAndContext) |
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126 | { |
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127 | initialisationState = Unintialized; |
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128 | return AL_TRUE; |
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129 | } |
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130 | |
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131 | if (!_alutSanityCheck ()) |
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132 | { |
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133 | return AL_FALSE; |
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134 | } |
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135 | |
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136 | if (!alcMakeContextCurrent (NULL)) |
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137 | { |
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138 | _alutSetError (ALUT_ERROR_MAKE_CONTEXT_CURRENT); |
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139 | return AL_FALSE; |
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140 | } |
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141 | |
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142 | device = alcGetContextsDevice (alutContext); |
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143 | alcDestroyContext (alutContext); |
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144 | if (alcGetError (device) != ALC_NO_ERROR) |
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145 | { |
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146 | _alutSetError (ALUT_ERROR_DESTROY_CONTEXT); |
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147 | return AL_FALSE; |
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148 | } |
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149 | |
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150 | if (!alcCloseDevice (device)) |
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151 | { |
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152 | _alutSetError (ALUT_ERROR_CLOSE_DEVICE); |
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153 | return AL_FALSE; |
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154 | } |
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155 | |
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156 | initialisationState = Unintialized; |
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157 | return AL_TRUE; |
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158 | } |
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