1 | /* |
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2 | * This file defines the high-level interface to the sound device. It |
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3 | * actually dispatches requests based on the architecture that we're |
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4 | * targetting. See alc_backend.h for more of a clue. |
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5 | */ |
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6 | #include "al_siteconfig.h" |
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7 | |
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8 | #include <AL/al.h> |
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9 | #include <stdlib.h> |
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10 | #include <string.h> |
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11 | |
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12 | #include "al_config.h" |
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13 | #include "al_debug.h" |
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14 | #include "al_main.h" |
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15 | #include "backends/alc_backend.h" |
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16 | |
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17 | typedef enum |
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18 | { |
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19 | AL_BACKEND_NONE_, |
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20 | AL_BACKEND_NATIVE_, /* native audio for platform */ |
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21 | AL_BACKEND_ALSA_, /* ALSA backend */ |
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22 | AL_BACKEND_ARTS_, /* aRts backend */ |
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23 | AL_BACKEND_DMEDIA_, /* Irix/DMedia back-end */ |
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24 | AL_BACKEND_ESD_, /* ESD backend */ |
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25 | AL_BACKEND_SDL_, /* SDL backend */ |
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26 | AL_BACKEND_NULL_, /* null backend */ |
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27 | AL_BACKEND_WAVEOUT_ /* WAVE backend */ |
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28 | } ALC_BackendType; |
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29 | |
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30 | struct ALC_BackendStruct |
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31 | { |
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32 | ALC_BackendType type; |
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33 | ALC_OpenMode mode; |
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34 | ALC_BackendPrivateData *privateData; |
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35 | }; |
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36 | |
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37 | ALC_Backend * |
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38 | alcBackendOpen_ (ALC_OpenMode mode) |
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39 | { |
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40 | Rcvar device_params; |
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41 | Rcvar device_list; |
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42 | Rcvar device; |
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43 | ALC_BackendType type = AL_BACKEND_NONE_; |
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44 | ALC_BackendPrivateData *privateData = NULL; |
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45 | ALC_Backend *backend; |
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46 | char adevname[64]; /* FIXME: magic number */ |
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47 | |
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48 | device_list = rc_lookup ("devices"); |
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49 | while (device_list != NULL) |
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50 | { |
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51 | device = rc_car (device_list); |
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52 | device_list = rc_cdr (device_list); |
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53 | |
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54 | switch (rc_type (device)) |
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55 | { |
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56 | case ALRC_STRING: |
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57 | rc_tostr0 (device, adevname, 64); |
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58 | break; |
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59 | case ALRC_SYMBOL: |
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60 | rc_symtostr0 (device, adevname, 64); |
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61 | break; |
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62 | case ALRC_CONSCELL: |
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63 | device_params = rc_cdr (device); |
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64 | if (device_params == NULL) |
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65 | { |
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66 | continue; |
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67 | } |
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68 | rc_define ("device-params", device_params); |
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69 | rc_symtostr0 (rc_car (device), adevname, 64); |
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70 | break; |
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71 | default: |
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72 | _alDebug (ALD_CONTEXT, __FILE__, __LINE__, |
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73 | "alcBackendOpen_: bad type %s for device", |
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74 | rc_typestr (rc_type (device))); |
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75 | continue; |
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76 | } |
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77 | |
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78 | if (strcmp (adevname, "dsp") == 0) |
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79 | { |
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80 | _alDebug (ALD_CONTEXT, __FILE__, __LINE__, |
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81 | "alcBackendOpen_: 'dsp' is a deprecated device name. Use 'native' instead."); |
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82 | privateData = alcBackendOpenNative_ (mode); |
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83 | if (privateData != NULL) |
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84 | { |
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85 | type = AL_BACKEND_NATIVE_; |
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86 | break; |
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87 | } |
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88 | } |
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89 | if (strcmp (adevname, "native") == 0) |
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90 | { |
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91 | privateData = alcBackendOpenNative_ (mode); |
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92 | if (privateData != NULL) |
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93 | { |
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94 | type = AL_BACKEND_NATIVE_; |
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95 | break; |
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96 | } |
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97 | } |
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98 | |
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99 | if (strcmp (adevname, "alsa") == 0) |
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100 | { |
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101 | privateData = alcBackendOpenALSA_ (mode); |
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102 | if (privateData != NULL) |
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103 | { |
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104 | type = AL_BACKEND_ALSA_; |
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105 | break; |
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106 | } |
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107 | } |
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108 | |
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109 | if (strcmp (adevname, "arts") == 0) |
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110 | { |
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111 | privateData = alcBackendOpenARts_ (mode); |
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112 | if (privateData != NULL) |
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113 | { |
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114 | type = AL_BACKEND_ARTS_; |
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115 | break; |
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116 | } |
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117 | } |
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118 | |
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119 | if (strcmp (adevname, "dmedia") == 0) |
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120 | { |
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121 | privateData = alcBackendOpenDMedia_ (mode); |
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122 | if (privateData != NULL) |
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123 | { |
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124 | type = AL_BACKEND_DMEDIA_; |
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125 | break; |
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126 | } |
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127 | } |
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128 | |
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129 | if (strcmp (adevname, "esd") == 0) |
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130 | { |
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131 | privateData = alcBackendOpenESD_ (mode); |
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132 | if (privateData != NULL) |
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133 | { |
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134 | type = AL_BACKEND_ESD_; |
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135 | break; |
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136 | } |
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137 | } |
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138 | |
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139 | if (strcmp (adevname, "sdl") == 0) |
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140 | { |
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141 | privateData = alcBackendOpenSDL_ (mode); |
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142 | if (privateData != NULL) |
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143 | { |
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144 | type = AL_BACKEND_SDL_; |
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145 | break; |
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146 | } |
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147 | } |
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148 | |
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149 | if (strcmp (adevname, "null") == 0) |
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150 | { |
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151 | privateData = alcBackendOpenNull_ (mode); |
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152 | if (privateData != NULL) |
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153 | { |
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154 | type = AL_BACKEND_NULL_; |
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155 | break; |
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156 | } |
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157 | } |
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158 | |
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159 | if (strcmp (adevname, "waveout") == 0) |
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160 | { |
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161 | privateData = alcBackendOpenWAVE_ (mode); |
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162 | if (privateData != NULL) |
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163 | { |
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164 | type = AL_BACKEND_WAVEOUT_; |
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165 | break; |
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166 | } |
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167 | } |
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168 | } |
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169 | |
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170 | /* fallback: native */ |
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171 | if (type == AL_BACKEND_NONE_) |
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172 | { |
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173 | privateData = alcBackendOpenNative_ (mode); |
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174 | if (privateData != NULL) |
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175 | { |
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176 | type = AL_BACKEND_NATIVE_; |
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177 | } |
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178 | } |
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179 | |
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180 | if (type == AL_BACKEND_NONE_) |
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181 | { |
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182 | return NULL; |
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183 | } |
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184 | |
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185 | backend = |
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186 | (struct ALC_BackendStruct *) malloc (sizeof (struct ALC_BackendStruct)); |
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187 | if (backend == NULL) |
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188 | { |
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189 | return NULL; |
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190 | } |
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191 | |
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192 | backend->type = type; |
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193 | backend->mode = mode; |
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194 | backend->privateData = privateData; |
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195 | return backend; |
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196 | |
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197 | } |
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198 | |
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199 | ALboolean |
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200 | alcBackendClose_ (ALC_Backend *backend) |
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201 | { |
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202 | switch (backend->type) |
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203 | { |
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204 | case AL_BACKEND_NATIVE_: |
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205 | release_native (backend->privateData); |
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206 | break; |
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207 | case AL_BACKEND_ALSA_: |
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208 | release_alsa (backend->privateData); |
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209 | break; |
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210 | case AL_BACKEND_ARTS_: |
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211 | release_arts (backend->privateData); |
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212 | break; |
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213 | case AL_BACKEND_DMEDIA_: |
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214 | release_dmedia (backend->privateData); |
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215 | break; |
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216 | case AL_BACKEND_ESD_: |
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217 | release_esd (backend->privateData); |
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218 | break; |
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219 | case AL_BACKEND_SDL_: |
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220 | release_sdl (backend->privateData); |
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221 | break; |
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222 | case AL_BACKEND_NULL_: |
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223 | release_null (backend->privateData); |
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224 | break; |
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225 | case AL_BACKEND_WAVEOUT_: |
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226 | release_waveout (backend->privateData); |
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227 | break; |
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228 | default: |
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229 | _alDebug (ALD_CONTEXT, __FILE__, __LINE__, |
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230 | "alcBackendClose_: unknown backend %d\n", backend->type); |
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231 | return AL_FALSE; |
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232 | } |
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233 | free (backend); |
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234 | return AL_TRUE; |
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235 | } |
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236 | |
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237 | void |
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238 | alcBackendPause_ (ALC_Backend *backend) |
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239 | { |
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240 | switch (backend->type) |
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241 | { |
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242 | case AL_BACKEND_NATIVE_: |
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243 | pause_nativedevice (backend->privateData); |
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244 | break; |
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245 | case AL_BACKEND_ALSA_: |
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246 | pause_alsa (backend->privateData); |
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247 | break; |
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248 | case AL_BACKEND_ARTS_: |
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249 | pause_arts (backend->privateData); |
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250 | break; |
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251 | case AL_BACKEND_DMEDIA_: |
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252 | pause_dmedia (backend->privateData); |
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253 | break; |
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254 | case AL_BACKEND_ESD_: |
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255 | pause_esd (backend->privateData); |
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256 | break; |
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257 | case AL_BACKEND_SDL_: |
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258 | pause_sdl (backend->privateData); |
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259 | break; |
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260 | case AL_BACKEND_NULL_: |
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261 | pause_null (backend->privateData); |
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262 | break; |
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263 | case AL_BACKEND_WAVEOUT_: |
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264 | pause_waveout (backend->privateData); |
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265 | break; |
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266 | default: |
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267 | _alDebug (ALD_CONTEXT, __FILE__, __LINE__, |
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268 | "alcBackendPause_: unknown backend %d\n", backend->type); |
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269 | break; |
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270 | } |
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271 | } |
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272 | |
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273 | void |
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274 | alcBackendResume_ (ALC_Backend *backend) |
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275 | { |
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276 | switch (backend->type) |
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277 | { |
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278 | case AL_BACKEND_NATIVE_: |
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279 | resume_nativedevice (backend->privateData); |
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280 | break; |
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281 | case AL_BACKEND_ALSA_: |
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282 | resume_alsa (backend->privateData); |
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283 | break; |
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284 | case AL_BACKEND_ARTS_: |
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285 | resume_arts (backend->privateData); |
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286 | break; |
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287 | case AL_BACKEND_DMEDIA_: |
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288 | resume_dmedia (backend->privateData); |
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289 | break; |
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290 | case AL_BACKEND_ESD_: |
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291 | resume_esd (backend->privateData); |
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292 | break; |
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293 | case AL_BACKEND_SDL_: |
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294 | resume_sdl (backend->privateData); |
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295 | break; |
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296 | case AL_BACKEND_NULL_: |
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297 | resume_null (backend->privateData); |
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298 | break; |
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299 | case AL_BACKEND_WAVEOUT_: |
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300 | resume_waveout (backend->privateData); |
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301 | break; |
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302 | default: |
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303 | _alDebug (ALD_CONTEXT, __FILE__, __LINE__, |
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304 | "alcBackendResume_: unknown backend %d\n", backend->type); |
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305 | break; |
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306 | } |
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307 | } |
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308 | |
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309 | ALboolean |
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310 | alcBackendSetAttributes_ (ALC_Backend *backend, ALuint *bufsiz, |
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311 | ALenum *fmt, ALuint *speed) |
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312 | { |
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313 | switch (backend->type) |
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314 | { |
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315 | case AL_BACKEND_NATIVE_: |
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316 | return alcBackendSetAttributesNative_ (backend->mode, |
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317 | backend->privateData, bufsiz, |
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318 | fmt, speed); |
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319 | case AL_BACKEND_ALSA_: |
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320 | return alcBackendSetAttributesALSA_ (backend->mode, |
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321 | backend->privateData, bufsiz, fmt, |
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322 | speed); |
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323 | case AL_BACKEND_ARTS_: |
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324 | return alcBackendSetAttributesARts_ (backend->mode, |
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325 | backend->privateData, bufsiz, fmt, |
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326 | speed); |
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327 | case AL_BACKEND_DMEDIA_: |
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328 | return alcBackendSetAttributesDMedia_ (backend->mode, |
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329 | backend->privateData, bufsiz, |
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330 | fmt, speed); |
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331 | case AL_BACKEND_ESD_: |
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332 | return alcBackendSetAttributesESD_ (backend->mode, backend->privateData, |
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333 | bufsiz, fmt, speed); |
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334 | case AL_BACKEND_SDL_: |
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335 | return alcBackendSetAttributesSDL_ (backend->mode, backend->privateData, |
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336 | bufsiz, fmt, speed); |
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337 | case AL_BACKEND_NULL_: |
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338 | return alcBackendSetAttributesNull_ (backend->mode, |
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339 | backend->privateData, bufsiz, fmt, |
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340 | speed); |
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341 | case AL_BACKEND_WAVEOUT_: |
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342 | return alcBackendSetAttributesWAVE_ (backend->mode, |
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343 | backend->privateData, bufsiz, fmt, |
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344 | speed); |
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345 | default: |
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346 | _alDebug (ALD_CONTEXT, __FILE__, __LINE__, |
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347 | "alcBackendSetWrite_: unknown backend %d\n", backend->type); |
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348 | return AL_FALSE; |
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349 | } |
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350 | } |
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351 | |
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352 | void |
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353 | alcBackendWrite_ (ALC_Backend *backend, void *dataptr, int bytes_to_write) |
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354 | { |
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355 | switch (backend->type) |
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356 | { |
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357 | case AL_BACKEND_NATIVE_: |
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358 | native_blitbuffer (backend->privateData, dataptr, bytes_to_write); |
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359 | break; |
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360 | case AL_BACKEND_ALSA_: |
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361 | alsa_blitbuffer (backend->privateData, dataptr, bytes_to_write); |
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362 | break; |
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363 | case AL_BACKEND_ARTS_: |
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364 | arts_blitbuffer (backend->privateData, dataptr, bytes_to_write); |
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365 | break; |
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366 | case AL_BACKEND_DMEDIA_: |
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367 | dmedia_blitbuffer (backend->privateData, dataptr, bytes_to_write); |
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368 | break; |
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369 | case AL_BACKEND_ESD_: |
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370 | esd_blitbuffer (backend->privateData, dataptr, bytes_to_write); |
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371 | break; |
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372 | case AL_BACKEND_SDL_: |
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373 | sdl_blitbuffer (backend->privateData, dataptr, bytes_to_write); |
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374 | break; |
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375 | case AL_BACKEND_NULL_: |
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376 | null_blitbuffer (backend->privateData, dataptr, bytes_to_write); |
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377 | break; |
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378 | case AL_BACKEND_WAVEOUT_: |
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379 | waveout_blitbuffer (backend->privateData, dataptr, bytes_to_write); |
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380 | break; |
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381 | default: |
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382 | _alDebug (ALD_CONTEXT, __FILE__, __LINE__, |
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383 | "alcBackendWrite_: unknown backend %d\n", backend->type); |
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384 | break; |
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385 | } |
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386 | } |
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387 | |
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388 | ALsizei |
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389 | alcBackendRead_ (ALC_Backend *backend, void *capture_buffer, int bufsiz) |
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390 | { |
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391 | switch (backend->type) |
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392 | { |
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393 | case AL_BACKEND_NATIVE_: |
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394 | return capture_nativedevice (backend->privateData, capture_buffer, |
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395 | bufsiz); |
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396 | case AL_BACKEND_ALSA_: |
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397 | return capture_alsa (backend->privateData, capture_buffer, bufsiz); |
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398 | case AL_BACKEND_ARTS_: |
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399 | return capture_arts (backend->privateData, capture_buffer, bufsiz); |
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400 | case AL_BACKEND_DMEDIA_: |
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401 | return capture_dmedia (backend->privateData, capture_buffer, bufsiz); |
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402 | case AL_BACKEND_ESD_: |
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403 | return capture_esd (backend->privateData, capture_buffer, bufsiz); |
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404 | case AL_BACKEND_SDL_: |
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405 | return capture_sdl (backend->privateData, capture_buffer, bufsiz); |
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406 | case AL_BACKEND_NULL_: |
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407 | return capture_null (backend->privateData, capture_buffer, bufsiz); |
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408 | case AL_BACKEND_WAVEOUT_: |
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409 | return capture_waveout (backend->privateData, capture_buffer, bufsiz); |
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410 | default: |
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411 | _alDebug (ALD_CONTEXT, __FILE__, __LINE__, |
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412 | "alcBackendRead_: unknown backend %d\n", backend->type); |
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413 | return 0; |
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414 | } |
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415 | } |
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416 | |
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417 | ALfloat |
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418 | alcBackendGetAudioChannel_ (ALC_Backend *backend, ALuint channel) |
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419 | { |
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420 | switch (backend->type) |
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421 | { |
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422 | case AL_BACKEND_NATIVE_: |
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423 | return get_nativechannel (backend->privateData, channel); |
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424 | case AL_BACKEND_ALSA_: |
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425 | return get_alsachannel (backend->privateData, channel); |
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426 | case AL_BACKEND_ARTS_: |
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427 | return get_artschannel (backend->privateData, channel); |
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428 | case AL_BACKEND_DMEDIA_: |
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429 | return get_dmediachannel (backend->privateData, channel); |
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430 | case AL_BACKEND_ESD_: |
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431 | return get_esdchannel (backend->privateData, channel); |
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432 | case AL_BACKEND_SDL_: |
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433 | return get_sdlchannel (backend->privateData, channel); |
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434 | case AL_BACKEND_NULL_: |
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435 | return get_nullchannel (backend->privateData, channel); |
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436 | case AL_BACKEND_WAVEOUT_: |
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437 | return get_waveoutchannel (backend->privateData, channel); |
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438 | default: |
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439 | _alDebug (ALD_CONTEXT, __FILE__, __LINE__, |
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440 | "alcBackendGetAudioChannel_: unknown backend %d\n", |
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441 | backend->type); |
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442 | return 0; |
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443 | } |
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444 | } |
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445 | |
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446 | void |
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447 | alcBackendSetAudioChannel_ (ALC_Backend *backend, ALuint channel, |
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448 | ALfloat volume) |
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449 | { |
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450 | switch (backend->type) |
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451 | { |
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452 | case AL_BACKEND_NATIVE_: |
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453 | set_nativechannel (backend->privateData, channel, volume); |
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454 | break; |
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455 | case AL_BACKEND_ALSA_: |
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456 | set_alsachannel (backend->privateData, channel, volume); |
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457 | break; |
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458 | case AL_BACKEND_ARTS_: |
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459 | set_artschannel (backend->privateData, channel, volume); |
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460 | break; |
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461 | case AL_BACKEND_DMEDIA_: |
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462 | set_dmediachannel (backend->privateData, channel, volume); |
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463 | break; |
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464 | case AL_BACKEND_ESD_: |
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465 | set_esdchannel (backend->privateData, channel, volume); |
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466 | break; |
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467 | case AL_BACKEND_SDL_: |
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468 | set_sdlchannel (backend->privateData, channel, volume); |
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469 | break; |
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470 | case AL_BACKEND_NULL_: |
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471 | set_nullchannel (backend->privateData, channel, volume); |
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472 | break; |
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473 | case AL_BACKEND_WAVEOUT_: |
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474 | set_waveoutchannel (backend->privateData, channel, volume); |
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475 | break; |
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476 | default: |
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477 | _alDebug (ALD_CONTEXT, __FILE__, __LINE__, |
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478 | "alcBackendSetAudioChannel_: unknown backend %d\n", |
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479 | backend->type); |
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480 | break; |
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481 | } |
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482 | } |
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