1 | /* -*- mode: C; tab-width:8; c-basic-offset:8 -*- |
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2 | * vi:set ts=8: |
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3 | * |
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4 | * al_state.c |
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5 | * |
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6 | * Per-context state management. |
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7 | * |
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8 | */ |
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9 | #include "al_siteconfig.h" |
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10 | |
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11 | #include <AL/al.h> |
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12 | |
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13 | #include "al_distance.h" |
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14 | #include "al_error.h" |
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15 | #include "al_ext.h" |
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16 | |
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17 | /* |
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18 | * A few general remarks about the code below: |
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19 | * |
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20 | * * When there is no current context, we set an AL_INVALID_OPERATION. Even |
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21 | * without a context for recording this error, this is nice for |
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22 | * debugging. |
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23 | * |
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24 | * * As a general contract with the user, we never modify any data via |
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25 | * pointers if an error condition occurs. |
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26 | * |
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27 | * * Getting and locking the context should be done in a single atomic |
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28 | * operation, but our internal API is not yet capable of this. |
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29 | * |
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30 | * * We should somehow hook in the extension mechanism here. |
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31 | * |
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32 | */ |
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33 | |
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34 | void |
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35 | alEnable( ALenum param ) |
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36 | { |
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37 | AL_context *cc = _alcDCGetContext(); |
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38 | if( cc == NULL ) { |
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39 | _alDCSetError( AL_INVALID_OPERATION ); |
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40 | return; |
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41 | } |
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42 | _alcDCLockContext(); |
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43 | |
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44 | switch (param) { |
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45 | default: |
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46 | _alDCSetError( AL_INVALID_ENUM ); |
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47 | break; |
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48 | } |
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49 | |
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50 | _alcDCUnlockContext(); |
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51 | } |
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52 | |
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53 | void |
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54 | alDisable( ALenum param ) |
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55 | { |
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56 | AL_context *cc = _alcDCGetContext(); |
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57 | if( cc == NULL ) { |
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58 | _alDCSetError( AL_INVALID_OPERATION ); |
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59 | return; |
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60 | } |
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61 | _alcDCLockContext(); |
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62 | |
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63 | switch (param) { |
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64 | default: |
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65 | _alDCSetError( AL_INVALID_ENUM ); |
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66 | break; |
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67 | } |
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68 | |
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69 | _alcDCUnlockContext(); |
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70 | } |
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71 | |
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72 | ALboolean |
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73 | alIsEnabled( ALenum param ) |
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74 | { |
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75 | AL_context *cc = _alcDCGetContext(); |
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76 | if( cc == NULL ) { |
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77 | _alDCSetError( AL_INVALID_OPERATION ); |
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78 | return AL_FALSE; |
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79 | } |
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80 | _alcDCLockContext(); |
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81 | |
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82 | switch (param) { |
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83 | default: |
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84 | _alDCSetError( AL_INVALID_ENUM ); |
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85 | break; |
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86 | } |
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87 | |
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88 | _alcDCUnlockContext(); |
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89 | return AL_FALSE; |
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90 | } |
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91 | |
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92 | const ALchar* |
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93 | alGetString( ALenum param ) |
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94 | { |
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95 | const ALchar *value; |
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96 | ALchar extensions[1024]; /* TODO: Ugly! */ |
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97 | |
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98 | AL_context *cc = _alcDCGetContext(); |
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99 | if( cc == NULL ) { |
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100 | _alDCSetError( AL_INVALID_OPERATION ); |
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101 | return NULL; |
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102 | } |
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103 | _alcDCLockContext(); |
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104 | |
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105 | switch (param) { |
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106 | case AL_VERSION: |
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107 | value = "1.1"; |
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108 | break; |
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109 | case AL_RENDERER: |
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110 | value = "Software"; |
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111 | break; |
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112 | case AL_VENDOR: |
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113 | value = "OpenAL Community"; |
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114 | break; |
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115 | case AL_EXTENSIONS: |
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116 | _alGetExtensionStrings( extensions, sizeof( extensions ) ); |
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117 | value = extensions; |
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118 | break; |
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119 | case AL_NO_ERROR: |
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120 | value = "No Error"; |
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121 | break; |
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122 | case AL_INVALID_NAME: |
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123 | value = "Invalid Name"; |
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124 | break; |
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125 | case AL_INVALID_ENUM: |
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126 | value = "Invalid Enum"; |
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127 | break; |
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128 | case AL_INVALID_VALUE: |
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129 | value = "Invalid Value"; |
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130 | break; |
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131 | case AL_INVALID_OPERATION: |
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132 | value = "Invalid Operation"; |
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133 | break; |
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134 | case AL_OUT_OF_MEMORY: |
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135 | value = "Out of Memory"; |
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136 | break; |
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137 | default: |
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138 | value = NULL; |
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139 | _alDCSetError( AL_INVALID_ENUM ); |
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140 | break; |
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141 | } |
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142 | |
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143 | _alcDCUnlockContext(); |
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144 | return value; |
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145 | } |
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146 | |
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147 | #define MAX_DATA_ENTRIES_FILLED 1 |
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148 | |
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149 | /* everything is better than code duplication, even macros... */ |
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150 | |
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151 | #define DEFINE_GETTER(type,conv,namev,name) \ |
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152 | void \ |
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153 | namev( ALenum param, type *data ) \ |
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154 | { \ |
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155 | AL_context *cc = _alcDCGetContext(); \ |
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156 | if( cc == NULL ) { \ |
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157 | _alDCSetError( AL_INVALID_OPERATION ); \ |
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158 | return; \ |
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159 | } \ |
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160 | _alcDCLockContext(); \ |
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161 | \ |
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162 | switch( param ) { \ |
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163 | case AL_DOPPLER_FACTOR: \ |
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164 | data[0] = conv(cc->doppler_factor); \ |
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165 | break; \ |
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166 | case AL_DOPPLER_VELOCITY: \ |
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167 | data[0] = conv(cc->doppler_velocity); \ |
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168 | break; \ |
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169 | case AL_SPEED_OF_SOUND: \ |
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170 | data[0] = conv(cc->speed_of_sound); \ |
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171 | break; \ |
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172 | case AL_DISTANCE_MODEL: \ |
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173 | data[0] = conv(cc->distance_model); \ |
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174 | break; \ |
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175 | default: \ |
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176 | _alDCSetError( AL_INVALID_ENUM ); \ |
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177 | break; \ |
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178 | } \ |
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179 | \ |
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180 | _alcDCUnlockContext(); \ |
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181 | } \ |
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182 | \ |
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183 | type \ |
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184 | name( ALenum param ) \ |
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185 | { \ |
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186 | type buf[MAX_DATA_ENTRIES_FILLED]; \ |
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187 | namev(param, buf); \ |
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188 | return buf[0]; \ |
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189 | } |
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190 | |
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191 | #define CONV_BOOLEAN(x) ((x) ? AL_TRUE : AL_FALSE) |
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192 | #define CONV_INTEGER(x) ((ALint)(x)) |
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193 | #define CONV_FLOAT(x) ((ALfloat)(x)) |
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194 | #define CONV_DOUBLE(x) ((ALdouble)(x)) |
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195 | |
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196 | DEFINE_GETTER(ALboolean,CONV_BOOLEAN,alGetBooleanv,alGetBoolean) |
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197 | DEFINE_GETTER(ALint,CONV_INTEGER,alGetIntegerv,alGetInteger) |
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198 | DEFINE_GETTER(ALfloat,CONV_FLOAT,alGetFloatv,alGetFloat) |
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199 | DEFINE_GETTER(ALdouble,CONV_DOUBLE,alGetDoublev,alGetDouble) |
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200 | |
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201 | #undef DEFINE_GETTER |
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202 | |
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203 | void |
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204 | alDopplerFactor( ALfloat value ) |
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205 | { |
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206 | AL_context *cc = _alcDCGetContext(); |
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207 | if( cc == NULL ) { |
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208 | _alDCSetError( AL_INVALID_OPERATION ); |
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209 | return; |
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210 | } |
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211 | _alcDCLockContext(); |
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212 | |
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213 | if( value < 0.0f ) { |
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214 | _alDCSetError( AL_INVALID_VALUE ); |
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215 | _alcDCUnlockContext(); |
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216 | return; |
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217 | } |
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218 | cc->doppler_factor = value; |
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219 | |
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220 | _alcDCUnlockContext(); |
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221 | } |
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222 | |
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223 | void |
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224 | alDopplerVelocity( ALfloat value ) |
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225 | { |
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226 | AL_context *cc = _alcDCGetContext(); |
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227 | if( cc == NULL ) { |
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228 | _alDCSetError( AL_INVALID_OPERATION ); |
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229 | return; |
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230 | } |
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231 | _alcDCLockContext(); |
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232 | |
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233 | if( value <= 0.0f ) { |
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234 | _alDCSetError( AL_INVALID_VALUE ); |
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235 | _alcDCUnlockContext(); |
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236 | return; |
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237 | } |
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238 | cc->doppler_velocity = value; |
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239 | |
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240 | _alcDCUnlockContext(); |
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241 | } |
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242 | |
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243 | void |
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244 | alSpeedOfSound( ALfloat value ) |
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245 | { |
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246 | AL_context *cc = _alcDCGetContext(); |
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247 | if( cc == NULL ) { |
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248 | _alDCSetError( AL_INVALID_OPERATION ); |
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249 | return; |
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250 | } |
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251 | _alcDCLockContext(); |
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252 | |
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253 | if( value <= 0.0f ) { |
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254 | _alDCSetError( AL_INVALID_VALUE ); |
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255 | _alcDCUnlockContext(); |
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256 | return; |
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257 | } |
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258 | cc->speed_of_sound = value; |
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259 | |
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260 | _alcDCUnlockContext(); |
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261 | } |
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262 | |
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263 | void |
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264 | alDistanceModel( ALenum distanceModel ) |
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265 | { |
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266 | AL_context *cc = _alcDCGetContext(); |
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267 | if( cc == NULL ) { |
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268 | _alDCSetError( AL_INVALID_OPERATION ); |
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269 | return; |
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270 | } |
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271 | _alcDCLockContext(); |
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272 | |
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273 | switch( distanceModel ) { |
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274 | case AL_NONE: |
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275 | case AL_INVERSE_DISTANCE: |
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276 | case AL_INVERSE_DISTANCE_CLAMPED: |
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277 | case AL_LINEAR_DISTANCE: |
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278 | case AL_LINEAR_DISTANCE_CLAMPED: |
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279 | case AL_EXPONENT_DISTANCE: |
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280 | case AL_EXPONENT_DISTANCE_CLAMPED: |
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281 | cc->distance_model = distanceModel; |
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282 | _alUpdateDistanceModel(cc); |
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283 | break; |
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284 | default: |
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285 | _alDCSetError( AL_INVALID_ENUM ); |
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286 | break; |
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287 | } |
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288 | |
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289 | _alcDCUnlockContext(); |
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290 | } |
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